DE2903447C2 - - Google Patents

Description

The invention relates to a recording and Playback device for sheet-shaped originals under Use of transparent, photoplastic Footage with a master station, one Lighting device for one in the Template holding station arranged template, a first Projection device for the projection of the Template image via a first, optical path a selectable image area of the gradual and perpendicular to the first optical path, clear, photoplastic film material, a second projection device with a Light source with which an image area for control purposes of the transparent, photoplastic film material above a second, optical path on a screen is projectable, with a device for applying a electrostatic charge on the transparent, Photoplastic footage in an area of the image is crossed by the first optical path, a device for heating the transparent, photoplastic footage in the selected one Image area for recording an image, and one that can be operated by an operator Control device with which optionally a recording or rendering an image on the clear, photoplastic film material can be effected.  

In US-PS 35 47 628 and US-PS 32 91 601 one Device described which is a photoplastic film used with a three-layer structure that is transparent to those projecting the image To let light rays through. In both Patent documents describe a device  which one such film in turn by at least transported to four stations. At the first station an even electrostatic charge on the heat deformable photoconductive outer layer applied. At the The second stop is this evenly charged outside exposed to the light of an image to pass through the activating radiation the uniform electrostatic Charge in the bright areas of the projected on it To selectively discharge the image. A heater on the third station heats the outer layer to get it give way and a deformation or swelling of the image areas to allow the remains of electrostatic charge to carry. An optical streak projects at the fourth station projector light rays through the deformed in this way Film to produce a readable copy of the image that is over deformation is recorded on the film. Such type and how they work are undesirable costly and complicated.

In a device described in US Patent 37 81 106 and U.S. Patent 3,992,090 is described as a photoplastic Film related to a four-layer structure, the fourth or outer layer of a thin strongly reflect the material exists. In US-PS 38 69 201 will continue describes a microplan film made from such film material. The device described in US Pat. No. 3,781,106 has Devices for recording and projecting on the opti Use cal elements together so that micro recording successive record or data sheets in sequence on successive fields of a plan filmes with multiple fields or on the successive Formed, reviewed and checked images of a striped film then optionally corrected if necessary, he  can be added or updated. The However, the device is quite complicated and has the aftermath part that the projection screen for using the front direction as a projector part of the template holder for the Is templates that are to be photocopied onto the film. The Device can therefore not be used as a projector, when an original is capable of photocopying. The optical system is also based on radiation parts the components and is based on the use of the reflective or reflective photoplastic film which, as it has now turned out, extraordinary is sensitive and where there is a risk that it is on its reflective layer in normal handling is damaged.

US Pat. No. 3,869,201 shows that the film plate can have dimensions such that it meets the requirements of the National Microfilm Association (NMA) microfilm standard for 24 × micro recording. That is, such a film plate can be about 105 mm long and 148 mm wide, with 98 fields or images that can carry information images and 12.5 mm long and 10 mm wide, in a rectangular pattern of seven transverse or side rows with fourteen such fields or image areas in each row. As shown in US Pat. No. 3,992,090, the 98 fields can expediently be addressed individually by using a right-angled coordinate pair based on the letters A through G , each of which is a different row from the top down Identify rows, the numbers one through fourteen each identifying from left to right another column of the fourteen columns corresponding to the fourteen image areas in each row. In this patent it is further stated that the film plate in the form of a special film card can be held in a carriage and can be transported along orthogonal paths to selectively the desired image area of the film card in a fixed optical path for recording a light beam carrying the image projected through a lens until it images the image sharply on a transverse film holder having a side plate located at the back of an area of the photoplastic film that covers a reflective surface area in the form of a film image. An optical opening is provided between the lens unit and the film area held by the plate, so that the back of the film, which is opposite its reflecting surface, is accessible in this opening. A heated metal block is movably mounted so that it can be advanced into the plate opening in order to come into contact with the accessible area of the back of the film and thereby cause a softening of this film area by thermal conduction, which is between the optical size and the plate opening located. The image area is electrostatically charged via a corona generator, which is held in a fixed position at a distance above the film plane. It is believed that a significant potential difference develops between the conductive surfaces of both the plate and the heated block, on the one hand, and the conductive layer of the multilayer photoplastic film, on the other hand, so that the film clings tightly to the plate and the heated block. This recording device does not offer the possibility of reading or checking the images recorded on the film.

A recording and known from US-PS 36 97 176 Playback device in which only one lens system is very cumbersome to use, because one Template must be placed on top of the platen. If you sit in front of this device, it is difficult in the Sitting position a template on top of the platen to align.

A recording and reproducing device of the type mentioned in the US-PS 32 63 557 described. This device has a relatively large size Size. Furthermore, the ease of use allows wish since two different positions for the recording and playback are provided, so that when looking at a picture just recorded the film has to be moved a bit. Furthermore, this known device from the Manufacturing costs not optimized since two different lens systems are required.

The invention has for its object a Recording and playback device of the entry mentioned type in such a way that they are a has a compact size and is simple and reliable is to use.

This object is achieved in that microfilm cards are used as transparent, photoplastic film material, that the first and the second optical path, starting from the image plane up to a pivotable mirror device, have a common optical path section in which the lens system of the respective projection device is to be arranged, wherein the light source of the second projection device is located on the side of the image plane opposite the lens system and
that the pivotable mirror device can be switched between a first and a second position, the common optical path section being switched on in the first position in the first optical path and the second optical path being blocked and in the second position the common optical path section being switched into the second optical path switched on and the first optical path is blocked.

Through this solution according to the invention, it is particularly enables to get by with only one lens system achieved that the device has a compact size has and is easy and reliable to use.

In a preferred embodiment of the invention the basic reduction ratio is something, namely increased to 25 times, so that a template 25 times between the original template level and the sharp image in the image area on the Film card is reduced. This increased Reduction ratio offers for originals with a Size of 21.6 × 27.9 cm sufficient leeway for errors in the exact arrangement of the card and other components and offers a guarantee a loss of information on the outer edges of the Originals. For image control, d. H. to read the recorded image in an image area the same lens system used, the length of the optical path or image path is chosen so that an image that only appears on an observation screen is slightly smaller than 21.6 × 27.9 cm. Due to the Change in path length and other influencing factors using this type of recording film  are the position of the lens or Lens system between the recording mode and the control mode will be changed. In the Image control, it is also desirable that the operator has the opportunity to Adjust the sharpness of the image on the Control observation screen. The sharp image of the Image on the surface of the photoplastic film when recording  however, extremely crucial and should be preferred be left to the setting in the manufacturing company. These otherwise not compatible requirements fulfilled according to the invention via an arrangement by which all setting elements controllable by the operator for the focus of the lens can be decoupled when the device operates in the recording mode, and that Lens when the device for monitoring operation returns, automatically moved to a home position which is related to the monitoring path length and the one adjustment controlled by the operator can be overlaid.

In a modified embodiment of the invention an additional lens is provided for a 32x To get downsizing, this embodiment is however, on recording to copy an image with up to 27.9 × 35.6 cm in size on an image area a standard size picture card. Because of the areas area of the observation screen remains unchanged and it it is desirable to always use the entire capacity, as well even the image area remains unchanged, only the lens used with 25x magnification in image control, no matter what reduction ratio when recording has been chosen.

Precise clamping of the film card is achieved that the corona generator housing is movably attached, so that it can be pushed down to the film to press against the underlying plate construction. An additional benefit is obtained in that neither the corona discharge still carries the image information Scatter light laterally so that it is on an adjacent one Image area meets what would otherwise lead to an error  which is known as overwriting. In addition, the Image area that is currently exposed to stray light shielded to prevent fogging.

The back of the film is over a heated block Exposed to heat through an opening in a plate is pressed, as is similar in US Pat. No. 3,992,090 is written. However, it is a powerful sub printing device provided so that the film is more effective fits tightly on the block than can be achieved if electrostatic attraction is used, as is the case with The subject of US-PS 39 92 090 is the case.

Basically, the possibility of image surveillance is Device such that it is definitely an unintended one Record on an already exposed image area an image card is avoided. Preferably located the device usually in image control mode when a Film card is inserted and gradually to the image area is transported, on which a recording is to take place. If this area is already exposed or occupied, is the image recorded there on the observation screen appear to warn the operator who then the film card to an unoccupied image area or can be transported to an image area that is deleted can be, and on which there is again a recording can. In certain circumstances, it may be desirable to ensure an automatic display that an image be sets is what can be achieved by a sensor device can in a further embodiment of the invention is used. Such a sensor takes advantage of the fact that a film in an exposed image area as a whole due to the heat present to form the image undergoes a deformation that is perceptible as an indication, that the image area is occupied. It can also be a marker  on the security margin between the whole development projected image area and the image area and ent be wrapped with the to take a template image maximum size is assigned, this marking via a suitable sensor for an automatic display can be perceived.

One idea of the invention is an award and control imaging device for photoplastic films to selectively wavy image patterns in image areas of such Film about an electro corresponding to a picture pattern form static charge and thermal deformation, wherein the device according to the invention a document holding station, a device for illuminating the original holding station, means for projecting an image from the front layer holding station via a first optical path, an on direction, which is a translucent readable map of a photo plastic film step by step at selectable image positions further transportable in an image plane perpendicular to the first optical path, a device that holds in the first optical path between the image plane and the document holder station is arranged to provide an optical image of the template at the template station on the surface of the face card in imaging the image plane sharply, a projection light source, which are on the opposite of the imaging device lying side of the image plane, an observation umbrella, a facility that can optionally work around to interrupt the first optical path and a second to form optical path, one after the other from the projection light source over the image plane and the imaging device leads to the observation screen, a facility that during electrostatic charge during a recording cycle places the image card in the image plane on an image area,  which is crossed by the first optical path, a device the film in the image area during the recording cycle Exposes heat to the formation of the image, and one of the The operator has a control device put into operation, to control the optional facility.

A particularly preferred idea of the invention consists in a photo recording and control image device plastic films that has a rotatable mirror that in a position a first optical path from one Document holding station via a lens to an image plane forms in which a plate is provided which is permeable readable film card from a photoplastic film. In a second position of the rotatable mirror results a second optical path from a projection light source over the image plane and the lens to an observation umbrella. In one embodiment, a lens revolver multiple objects with different focal lengths to to for different magnification ratios care and thereby original templates with different sizes to take pictures. Control panel are for automatic Return to the lens provided that a full screen projection of the picture from the picture card on the obs caution screen regardless of which one is selected for photography Reduction ratio delivers. The possibility of one Manual focus is only for image control possible, this setting is removed when photocopying couples. A heated block to develop the images on The different image areas of the film card is so marked orders that it works like a valve to a vacuum generate at the bottom of the movie card if he heated block is placed on it to make the film card tight on the block. An additional valve device in the he heated block ensures that the vacuum is quickly released is lifted when the heated block is withdrawn. At a modified embodiment, one on light  responsive diode and a light source related to one Deformation of the film in the image area to perceive what as Evidence serves that a picture has already been placed there beforehand is drawing. A light shield is provided blurring and blurring of the image when Avoid photocopying.

The following are preferred based on the drawing Exemplary embodiments of the invention are explained in more detail:

Fig. 1 shows a perspective view of an exemplary embodiment of the recording and control image connection according to the invention for photo plastic films.

Fig. 2 shows a schematic view of the basic components of the device shown in Fig. 1, the image control operation.

FIG. 3 shows a partial top view of certain mirrors and the observation or control screen of the device shown in FIG. 1.

Fig. 4 shows a side view of the mirrors and the control screen of Fig. 3, seen from the left side.

Fig. 5 shows in a Fig. 2 similar schematic view of the components for the recording or photography operation.

Fig. 6 shows a partial plan view of the heated block and its carriage, which are used in the device shown in Fig. 1 Darge.

Fig. 7 shows a sectional view on an enlarged scale rod along the line 7-7 in Fig. 6th

Fig. 8 shows a schematic perspective view of the main components associated with the carriage of the heated block of Fig. 6 to control it.

FIG. 9 shows the movement of the components in a schematic side view of the components shown in FIG. 8.

Fig. 10 shows a partial cross-sectional view taken along the line 10-10 in Fig. 6 and the mutual relationship between the heated block, the plate, the microplan film and the corona box in detail.

Fig. 11 shows in a Fig. 10 similar view he heated block and the corona box in their relative position to the film card to form an image.

Fig. 12 shows a partial side view of the device for attaching and handling the corona box.

FIG. 13 shows a view of the components shown in FIG. 12 from below.

Fig. 14 shows a partial sectional view along the line 14-14 in Fig. 12 on an enlarged scale.

Fig. 15 shows an enlarged view of a keyboard in a modified embodiment of the embodiment shown in Fig. 1, which provides two different magnifications.

Fig. 16 shows a partial plan view of a Einstellein direction and a holder for the lens frame, which are used in a modified embodiment example with the keyboard shown in Fig. 15.

Fig. 17 shows a perspective exploded partial view of the key elements in Fig. 16 to explain the various movements and Ver adjustment options of the device.

Fig. 18 shows another modified exemplary embodiment of the keyboard used in use with the surface sensor.

Fig. 19 shows in a Fig. 5 similar schematic representation of the components, which are provided in an exemplary embodiment from, which uses the upper surface sensor, the device being in the operational state.

Fig. 20 shows the components in the recording process in a view similar to Fig. 19.

FIG. 21 shows the components in image control in a view similar to FIG. 19.

Fig. 22 shows in a Teildraufsich the sensor and the breaker in the illustrated in FIGS. 18 to 21 embodiment.

FIG. 23 shows a cross-sectional view along line 23-23 in FIG. 2.

In Fig. 1, an embodiment of the invention designated 30 is shown. With the exception of the keyboard 31 , all components are accommodated in a housing 32 . An opening 33 in the housing 32 makes the viewing screen 34 accessible, while an opening 35 makes the document holding station 36 accessible. The document holding station 36 has a flat horizontal surface on which the reproduction limits or boundaries 37 can be plotted, which indicate the maximum document limits to the operator. Another opening 38 is located above the keyboard 31 and serves to insert a photoplastic film card on which the images are to be recorded. An operating switch 39 controls the main power supply for the devices located in the housing, while a manually operated setting button 40 and a button-operated switch 175 are provided for reasons described later.

The keyboard 31 has a number of control buttons, which serve both to determine the various ways of working of the device and to select the image area on the film card. The central group 41 of 21 buttons, which are designated with the letters A to G and 1 to 14 , serves to select the desired picture on the film card via rectangular coordinates. The other buttons are the button 42 labeled "Hi-Lo-Monitor" for a strong and weak control image, the button 43 labeled "Photograph" for photography, the button 44 labeled "Advance Frame" for the image feed, the button " Unload "button 45 for output, button" Erase "button 46 for deleting and button" ON-OFF Monitor "button 176 for switching the control image on and off. A signal lamp 177 is also provided, which indicates that the device is ready for photocopying.

As shown in FIG. 2, the document holding station is provided with a device in the form of light emitters 47 and 48 in order to illuminate the document holding station 36 . Although only two light emitters are shown in FIG. 2, a bank of four light emitters is preferably used in a preferred embodiment, with a second pair of emitters behind the two emitters shown in the drawing. A device in the form of a first mirror 49 serves to project an image from the original holding station 36 via a first optical path, the initial part of which is represented by dash-dotted lines 50 and 51 in FIG. 2.

When the film card is inserted into the device, it is located in an image plane 52 which, as will be shown later, is arranged perpendicular to the first optical path. A lens 53 is arranged in the first optical path between the image plane 52 and the original station 36 and sharply images an optical image of the original at the original station on the surface of the image card in the image plane 52 . A projection light source 54 comprising a projection lamp 55 , a mirror 56 and a converging lens system 57 is arranged on the side of the image plane 52 opposite the imaging device or the objective 53 .

A rotatably mounted mirror device 58 can optionally be actuated in the manner described later in order to interrupt the first optical path and form a second optical path which leads in turn from the projection light source 54 via the image plane 52 and the imaging device 53 to the observation screen 34 , which is not shown in Fig. 2 and is in front of the drawing plane in Fig. 2, as shown in Fig. 3. From FIGS. 2, 3 and 4 it can be seen that the second optical path from the mirror 58 to the mirror 59, is then deflected to the mirror 60 and finally to the observation screen 34. A light interrupter 178 , which is under the control of an actuator 179 , is disposed above the lens 53 to independently interrupt the first optical path to the image plane in a manner to be described later.

A corona discharge generating element in a box or housing 61 is held at one end of a lever arm 62 and serves to apply an electrostatic charge to the image card in the image plane 52 at an image area crossed by the first optical path during a recording cycle . A heated metal block or block 63 is held at the end of a carriage member 64 to expose the film in the image area to heat that forms the image during a recording cycle.

When the power supply for the devices is switched on by actuation of the power supply switch 39 , the emitters 47 and 48 are switched on, the interrupter 178 is withdrawn and the rotatable mirror 58 assumes the position shown in FIG. 2. The mirror 58 is connected to an electrical switch 65 , which is connected to the projection light source 54 , in order to supply it with energy only when the mirror device 58 assumes the position shown in FIG. 2, namely a position in which it switches forms a second optical path, in which an image is projected onto the observation screen 34 . Although it is not shown in the drawing, a film card carrier is provided which appears at the slot 38 in the housing 32 , as shown in FIG. 1. The support may be approximately as shown in US Pat. No. 3,992,090, except that it only has to be large enough to accommodate the film card without an additional index part, which is shown in US Pat. No. 3,992,090 is. The film card can be inserted into the carrier and an index position can be selected by pressing one of the alphabetically labeled buttons A through G to select the desired horizontal row on the film card and one of the numerically labeled buttons to select the vertical column . When the first pair of index buttons is pressed, the card carrier is automatically brought into position in the image plane 52 and arranged at the desired image position via a suitable XY slide device . During this handling of the film card, the corona box 61 is in a raised position under the control of a connected actuator 66 . As soon as the Schlittenein direction reaches the selected position, the corona box 61 is lowered by a control signal until its lower surface detects the surface of the film and presses it against a plate 67 .

The lens 53 is attached to a lens plate 68 which can be moved around a pivot point 69 via a lifting element 70 under the control of the control button 40 which can be operated by hand. As shown in Fig. 2, is the lifting member 70 via a connecting member 71 with the rotatable mirror means 58 from later-described reasons. Additional actuators 72 and 73 serve to control the carriage 64 for the heated block and the rotatable mirror device 58 , respectively.

When a film card is inserted into the device, the device's internal logic selects a reduced intensity level for the projection lamp 55 . The operator can then use the button 42 labeled "Hi-Lo monitor" to select either a lower or a higher light intensity for the projection lamp 55 . The reduced intensity is generally chosen to extend the life of the lamp. The observation screen 34 shows the operator an image of what is recorded on the map in the selected image area. If the selected image area is not occupied or has no recorded image, this fact becomes visible on the observation screen. Conversely, if the operator has selected an occupied image of the film card, what is recorded in this image area will appear on the observation screen and can be sharply imaged there by the operator via an actuation of the control button 40 .

If the selected image area is unoccupied and the operator has arranged an original to be photographed within the size and boundary lines 32 of the original holder 36 , the operator can press the photograph button 43 . When the signal lamp 177 lights up, which indicates that the mercury vapor lamps have their full light intensity, which is the case after a start-up time of about 5 minutes, actuation of the button 43 via a suitable control circuit leads to the work sequence of the device starting . During this start-up time, a blocking circuit is activated, which prevents triggering of a photographing or erasing cycle or a labeling cycle, if this is provided, as will be shown later. After pressing the button 43 , the first step consists in rotating the mirror device 58 from the position shown in FIG. 2 to the position shown in FIG. 5. At the beginning of such a rotation of the mirror device, the switch 65 is actuated in order to interrupt the energy supply of the projection lamp 55 . When the device 58 reaches the position shown in FIG. 5, it separates the lifting elements 70 from the lens mount 68 via the connecting member 71 , so that the lens is no longer subject to the control of the operator, but rather a position specified in the manufacturer's works for optimal imaging of a Image takes on the image plane 52 . As shown in FIG. 5, the first optical path from the master station 36 via the mirrors 49 and 58 to the objective 53 and through the tubular corona housing 61 onto the image plane 52 is completed.

As soon as the mirror device 58 has reached the position shown in FIG. 5, the corona generator, which is located in the box 61, is supplied with energy in order to apply an electrostatic charge to the film card in the image plane 52 at the image area immediately below the corona box.

At the same time, the optical image from the original station 36 is projected onto the image area of the image card via the devices described above. This creates an electrostatic image pattern in the photoplastic layer of the film card. The corona generator is energized for approximately 2 seconds, after which it is switched off. After 0 to 2 seconds, which depends on an adjustable setting of the device, the heating block 63 is moved from the position shown in FIG. 2 to the position shown in FIG. 5, in which it is against the lower surface through an opening in the plate 67 of the film protrudes in the image plane 52 . Further details of this mutual engagement will be described later. Before the heating block detects the film, however, the interrupter 178 is moved by the actuator 179 to interrupt the first optical path, thereby avoiding blurring of the image when the film vibrates by being detected by the heating block is or is shaken.

The temperature of the heating block 63 is kept at a certain level by thermostatically controlled electric heaters, at which the image is developed within approximately 1 second of contact with the film surface by causing rippling. After about 1 second of film contact, the heating block 63 is withdrawn into the position shown in Fig. 2. Although not shown in the drawing, interlocking means is provided between the heating block carriage 64 and the electrical control circuit so that when the block 63 detects the film on the plate 67 , the mirror 58 retracts in the direction shown in FIG Fig. 2 standby position is triggered. If the block 63 falls downward at the beginning of its return movement from the plate 67 , it triggers a withdrawal of the interrupter 178 and a delayed automatic transport of the film card to the next neighboring image position. The delay can be set to 0 to 2 seconds using a device (not shown), during which time the mirror 58 switches back to the mode of operation of the image control and the operator can quickly view the quality of the image that has just been developed. After a certain delay, switching automatically begins, which is accompanied by the fact that the corona box 61 is raised above its actuator 66 , so that it releases the film surface during its movement.

If an operator wants to further check the image recorded on the image area, they can retrieve a reset of the film card to the desired image via the coordinate selection buttons 41 . When the operator has determined that the image quality is satisfactory, he can advance the image card to the next available image by either pressing two corresponding coordinate buttons or, more conveniently, pressing the image transfer button 44 which, when actuated , the film card advances to the next picture below. This button 44 is also advantageous when scanning a series of images, since it moves the image card forward by one image each time it is pressed. The original at the original stand 36 can then be exchanged and the next image can be recorded.

In certain circumstances, the operator may find it unnecessary to check the film card after each photographing cycle. In this case, it can lock the rotary mirror 58 in the position shown in FIG. 5 by locking that the button 176 is pressed. Thereafter, the photography cycles can begin without the time delay due to the rotation of the mirror 58 . Subsequent actuation of button 176 will again result in movement of mirror 58 , as described above.

If a busy picture is to be deleted, the spring-loaded key switch 175 is held in the actuated position and the delete button 46 is pressed, whereupon, starting from the position of the device shown in FIG. 2, the temperature of the hot block 63 to a value is increased to erase the image and the hot block 63 is moved into contact with the film card for a period of time sufficient to erase the image in the frame. The hot block 63 is then withdrawn to the position shown in FIG. 2 and the image control is then switched on in order to view and check the deleted image field. If necessary, a new image can then be recorded on the deleted image field.

The device consisting of the hot block 63 and its slide 64 will be described in detail below with reference to FIGS. 6 to 11. The carriage 64 is fork-shaped at one end with two arms 74 and 75 , at the ends of which a transverse strut 76 is fastened by screws 77 and 78 , which have rollers 79 and 80 with flanges at their ends. A vertical pin 81 is fastened in the middle of the transverse strut 76 by a screw 82 . The upper end of the pin 81 is tapered and provided with a valve closing surface 83 which is complementary to a conical seat 84 near the upper end of an axial bore 85 which only partially passes through the block 63 from the bottom upwards. As best shown in FIGS. 10 and 11, the pin-like element 81 is arranged in the bore 85 in such a way that it keeps the block 63 free under the influence of its own weight. Lateral passages 86 and 87 connect the upper end of bore 85 in block 63 to the outside of the block under step or shoulder 88 . As is best shown in FIGS. 6 and 7, a plate 89 is attached to the underside of the block 63 , which on one side carries an arm 90 which sits loosely in a groove in a carrier 91 which is on the slide element 64 is attached. The engagement between the arm 90 and the bracket 91 prevents the block 63 from rotating about the pin 81 . Another arm 92 is attached to the underside of the block 63 and extends below the cross strut 76 and the screw 82 with a small space between them. The arm 92 prevents the block 63 from moving vertically away from the pin 81 for a distance greater than the space between the arm 72 and the underside of the cross strut 76 or more precisely the head of the screw 82 . So much play is provided between the block 63 and its holder that it can be released from the pin 81 to open the passage between the bore 85 and the side passages 86 and 87 .

As shown in FIGS. 8 and 9, the carriage 64 is connected at its surface to a second cross member 93 which carries rollers 94 and 95 with flanges at their respective ends which run on respective support rails 96 and 97 . The actuator 72 in the form of a vacuum actuator is pivotally connected to its lower arm 98 with the lower end of an arm 99 which sits on the underside of the carriage 64 . The carriage is normally biased by a spring into the position shown in solid lines in FIG. 9, the roller 80 running on a holding platform 100 and the roller 79 being held on a corresponding platform, not shown, in the manner shown in FIG. 6. When there is a vacuum via an input line, not shown, on the actuator 72 , the arm 98 is pulled to the left in Fig. 9, whereby the carriage on its rollers 79, 80, 94 and 95 is moved to the left while the hot block 63 in remains in its lowered position. Upon further actuation of the element 92, the roller 94 engages a stop element 101 which interrupts further movement to the left and acts as a fulcrum which causes the platform 64 to pivot about the cross strut 93 , whereby the hot block 63 is raised to its upper position which is shown in broken lines in FIG. 9. As a result, the surface of the block is passed up through the opening 102 in the surface of the plate 67 and in close contact with the image area of the film card 103 , which is held by the corona box 61 in firm abutment on the edges of the opening 102 , such as it is best shown in FIG .

Throughout the operation of the device, there is a vacuum across line 104 and side passage 105 in plate structure 67 in the side of the area or volume between hot block 63 in its raised position, film 103 and the edges of opening 102 . When the hot block is withdrawn, as shown in Fig. 10, the pressure in the opening 102 of the plate is essentially atmospheric. However, when the hot block is raised and begins to pass through the opening 102 , it acts as a valve that seals the volume and pulls the film card 103 down into close contact with the surface 127 of the hot block 63 . When the hot block 63 is raised, the pin 81 is of course relative to the valve seat 84 in the valve closed position. However, at the end of a record or erase cycle, when the actuator 72 of the carriage begins to release the carriage 64 , the initial movement of the cross member 76 downward will retract the pin 81 from contact with the valve seat 84 , thereby reducing the passage from the passages 86 and 87 to hole 85 is opened. As a result, the negative pressure in the space between the hot block 63 and the film 103 is immediately ventilated, so that the block falls off and follows the pin 81 in its downward movement. When the vacuum line communicating with the line 104 is tapped by the line supplying actuator 72 , a breakdown of the vacuum by opening the passage between the bore 85 and the passages 86 and 87 will also quickly reduce the vacuum on the actuator 72 cancel.

Referring to Figs. 10 and 11 it can be seen that the section of the platform next to the plate 67 is provided with air holes 106, which communicate with a skeleton-like network of passages in the bottom surface in connection with which a not shown device is a compressed air supply ver connected is. This creates an air cushion table to float the film card in place and thereby prevent scratching the surface of the card.

In the following, details of the element generating the corona discharge and its housing as well as its fastening will be described with reference to FIGS . The corona box or the housing 61 is fastened between two insulating arms 62 a and 62 b , which are articulated at 107 at the lower end of a holding element 108 . The element 108 hangs from a mounting plate 109 and is provided with a transverse slot 110 to weaken the element 108 and make it flexible. A stand 111 hangs rigidly from the mounting plate 109 at a short distance in front of the holding element 108 . The displacement of the hinge point 107 to the stator 111 to and carried by the stator 111 away on the cooperation of a pin 112 which passes through the element 108 and is screwed into the stand 111 and a set screw 113 which is screwed into the member 108 and the side of the stand 111 .

A solenoid 66 hangs from the mounting plate 109 , the armature 114 of the solenoid 66 being connected to the lever arms 62 a and 62 b via a cross pin 115 .

The lateral adjustment of the arms 62 a and 62 b is possible via a set screw 116 , which is held at the ver with a slot end of a stand 112 which hangs down from the mounting plate 109 , the set screw 116 abutting the arm 62 a while a leaf spring 118 , which is supported by a stand 119 , bears against the arm 62 b .

The adjustment of the articulation point 107 and the lateral position of the arms 62 a and 62 b is required in order to bring the application area 120 , which projects downward on the outside of the corona housing 61 , into position, as is best shown in FIG. 13 . The landing area has the shape of the Roman numeral two and is dimensioned so that it corresponds to the gaps on the film card between adjacent image areas. The underside of the housing 61 is open within the entire rectangular space, which is delimited by the central part of the contact area 120 . The upper end of the housing 61 is provided with a circular opening 121 into which a cylindrical light guide element 122 extends telescopically, which is held by a light shielding plate 123 which is attached to the lower end of the stand 119 and a second stand 124 . The plate 123 and the light element 122 remain stationary, while the corona housing 61 is articulated in the vertical direction in FIG. 12.

An element generating a corona discharge or a wire 125 is attached in the manner shown in FIG. 14 so that it projects into the center of the cavity of the housing 61 , which is made of an electrically insulating material, preferably a plastic, such as a polyacetal plastic ( Delrin) exists.

The corona housing 61 thus has a first opening which is delimited by the application region 120 and through which a corona discharge can pass if the corona element 125 is excited by applying a suitable voltage to the conductor 126 . The entire area of the contact area 120 lies in a common plane and the device is mounted relative to the plate 67 in the manner shown in FIGS . 10 and 11 in such a way that the contact area can be guided parallel to the plate 67 and down onto the plate 67 , so that the area with a good alignment can abut the boundaries of the opening 102 in the plate 67 . The settings described using the holder for the corona box in conjunction with FIGS. 12 and 13 are expedient in order to obtain the desired orientation. The housing 61 has a second opening 121 which, as already described, is arranged opposite the first opening, so that the light can pass through the openings in the housing 61 . The corona wire 125 is so fine that it leads to negligible interference of the light rays that pass through the housing.

The embodiment of the invention described so far uses a single set of lenses, which only allows a magnification ratio for recording and reading. The related ratio is a 25x magnification. A much greater adaptability can, however, be achieved in that additional lenses are built in to provide selectable focal lengths, so that different magnification ratios can be obtained. In Fig. 15, a keyboard is shown which is substantially similar to the keyboard shown in Fig. 1, but has provisions for 32x magnification during recording. As already mentioned in the introduction, only the lens with 25x magnification is used for reading and image control.

Details of the numerous lens attachment and handling devices will be described below with reference to FIGS. 16 and 17. The mounting plate or turret plate 68 carries two objectives 130, 131 at one end. In a preferred embodiment, the lens 130 has a focal length of 41 mm and has a magnification of 25 times, while the lens 131 has a focal length of 32 mm and a magnification of 32 times. The turret plate 68 is seen at its opposite end with two pins 132, 133 , which protrude from its lower surface so that they engage in slots 134 and 135 in the elements 136 and 137 . The pin 132 acts as a fulcrum for the turret movement in the horizontal plane. The setting of the location of this fulcrum is possible by loosening a fastening screw 138 and changing its position in the slot 139 in a bridge element 140 . The element 137 is movably mounted in the longitudinal direction under the control of a vacuum actuating member 141 and serves as a handling device for moving the turret plate 68 from one position on a stop 142 to a second position on a stop 143 . The stops 142 and 143 are adjustable together with the setting of the element 136 in order to center the lenses 130 and 131 in the desired optical path.

The turret plate 68 is held vertically by two plastic sliding elements 69 a , and 69 b at one end of an imaginary triangle, the apex of which is at pin 70 , which sits in a vertical bore in a disk 144 , the upper edge of which is vertical over the upper outer surface of the bridge element 140 protrudes. The washer 144 is attached to the side edge of the bridge member 140 in the manner shown. When the device is operating in the recording or photography mode, the pin 70 is in its lower retracted position in the bore of the disk 144 , so that the turret plate 68 sits on the outer circumference of the disk 144 . This means that the adjustable bearing plate 145 , which is fastened under the turret plate 68, rests on the disk 144 .

As best shown in FIG. 17, the bearing plate 145 is loosely attached at its respective ends to the underside of the plate 68 by header pins located at 146 and 147 and up through respective slots in the ends of the plate 145 go. Two adjustable screws 148 and 149 go through the turret plate from its upper outer surface and rest on the plate 145 to adjust its distance from the underside of the plate 68 . When the turret plate 68 is at the stop 142 and the bearing plate 145 detects the disc 144 , the adjustment of the adjusting screw 148 serves as a fine adjustment for the sharpness of the lens 130 . Similarly, when the turret plate 68 is at the stop 143 , the set screw 149 serves as a fine adjustment for the sharpness of the lens 131 . These two settings are made in the manufacturer's company in order to ensure correct focusing when taking pictures or drawing through the device.

Two levers 150 and 151 , which are each held by pivot pins 152 and 153 , are connected to the bridge element 140 and its associated frame, not shown. One end of the lever 151 protrudes under the pin 70 and determines the lifting of the pin 70 . The opposite end of the lever 151 communicates with a link 71 which is fixedly connected to the rotatable mirror device as described above. The link 71 may have the shape of a simple rope. One end of the lever 150 engages the outer end of the lever 151 and sits on top of that other end of the lever 151 under the force of a spring 154 . An eccentric element 155 , which is connected to an axis 156 , rests on the opposite end of the lever 150 . The axis 156 is connected to an adjusting button 40 . If, in the view shown in FIG. 17, there is an upward pull on the cable or on the connecting link 71 , the right end of the lever 150 is moved downward from engagement with the eccentric element 155 . At the same time, the lever 151 is pivoted so that the pin 70 retracts under the peripheral surface of the disk 144 . This serves to couple the manual setting and at the same time to transfer the focus of the lens to the precise setting of the disc 144 and the bearing plate 145 . Whenever the rope 71 is de-energized, the pin 70 is raised so that it engages the bearing plate 145 while the lever 150 pivots to engage the eccentric element 155 . This serves to shift the focus of the turret plate 68 to a central position by a certain distance, whereupon any adjustment can be made via the button 40 and the eccentric element 155 .

The operation of the device with a double lens system is essentially the same as that described above with reference to FIGS. 1 to 5. However, if a film card is inserted at the beginning, the nosepiece is automatically moved to the 25x position. If afterwards an original is to be photocopied, which is not larger than 21.6 × 27.9 cm, only the photographer button has to be pressed. The mode of operation is then exactly the same as that described above with reference to FIGS. 1 to 5. However, if an original is larger than 21.6 × 27.9 cm, ie up to approximately 27.9 × 35.5 cm in the illustrated embodiment, the button for 32x magnification in FIG. 15 is pressed in front of the photography button. When the photography button is pressed, the nosepiece 68 is moved to bring the lens 131 into the optical path while the rotatable Spiegelein device 58 is rotated to the photographing or recording position ge. As previously illustrated, when the heated block 63 detects the film, the rotatable mirror assembly begins to return to the image control position. The operation of the breaker 178 is the same as that previously described. If the lens system has been in the 32x magnification position, it will simultaneously move to the 25x magnification position. With this sequence of operations, the device is switched to the mode of image control, the projection lamp lighting up when the heated block is withdrawn. When the 32x magnification is selected, the nosepiece moves whenever the photography button is pressed until the 25x magnification is selected by pressing the 25x magnification button.

Instead of relying on reading the image area of the image card on the observation screen, it is also possible to provide a sensor in order to determine an exposed or occupied image area. An exemplary embodiment having such a device is described below with reference to FIGS. 18 to 23. The modified keyboard for such a device is shown in Fig. 18. It differs from the keyboard shown in Fig. 15 in that a monitor switch is used which has a different function than the switch labeled "Hi-Lo Monitor" in Fig. 15. The switch for image transport originally designated "Advance Frame" is now referred to as "Exposed Frame" and at least partially has a somewhat different function. Finally, the switch labeled "ON-OFF-Monitor" is replaced by a switch for the labeling, which is labeled "Annotate".

As shown in FIG. 19, the modified device is substantially the same as that described above with reference to FIGS. 1 to 5, modified by the construction of the double lens system of FIGS. 15 to 17. In addition, the light interrupter 160 , which is coupled to an actuating member 162, carries at one end an upper surface view sensor 161 which can move into and out of the optical path. As shown in detail in FIGS. 22 and 23, the breaker 160 is pivotally mounted at 163 to a housing 164 and then, when it detects the stop member 165, arranged so that it closes an opening 159 in the housing 164. When the actuator 162 , which may be of the vacuum type, is energized, it rotates the breaker 160 clockwise in Fig. 22 to expose the entire opening 159 and remove the sensor 161 from the optical path.

FIG. 19 shows this exemplary embodiment of the invention in the operational state. When the main power switch is turned on, the emitters 47 and 48 are energized to illuminate the original station 36 and project an image of any object thereon down the mirrors 49 and 58 onto the back of the sensor 161 , whereby the optical path is briefly interrupted. The sensor 161 is of a type commonly used to control web material, particularly fabrics, and includes a small light source and a light-insensitive diode. As shown in FIG. 19, the image card is clamped in the image plane 52 by the corona box 61 , which presses down on the image card and presses it against the plate 67 , as described above. The sensor 161 is arranged on the optical axis above the normal lens 130 with a magnification of 25 times and projects the light from its light source through the lens 130 and the corona box onto the image area of the image card, whereupon it is reflected back upwards. When the image card is completely flat, the reflected light is picked up by the light sensitive diode, releasing the control system to start a photographing cycle. An indicator light 166 located in the button labeled "Exposed Frame" in Fig. 18 will then go out.

If the image area under the lens 130 is already occupied by a recorded image, the film has a curved shape or a distortion that deflects the reflected light from the sensor 161 so that it no longer strikes the photosensitive diode located therein. This lack of receipt of a return signal by sensor 161 actuates an interlocking system which illuminates signal light 166 and prevents a photography cycle from being initiated when the photography button labeled "photographer" is pressed.

There are occasions when the operator may wish to label the occupied image area. In this case, he can first simultaneously press the key lock switch 175 and press the label button labeled "Annotate", whereby the locking of the system is released and a photography cycle can be triggered.

If an original is placed on the original holder 36 and the light 166 labeled "Exposed Frame" does not illuminate for an already exposed image area, the operator can press the photograph button labeled "Photograph" to initiate a photographing cycle. As a result, the actuator 162 withdraws the interrupter 160 with the sensor 161 and, if a 32-fold magnification is selected, the objective turret 68 is simultaneously displaced in order to position the objective 131 .

The rotatably mounted mirror 58 is already in its recording position. As soon as the light interrupter 160 is no longer in the light path, the image is projected through the corona box 61 onto the image area of the film and the corona generator is supplied with energy to produce an electrostatic pattern. The rest of the duty cycle is substantially the same as that described in the foregoing with reference to the other embodiments of the invention, except that the rotatable mirror 58 does not automatically move into the image monitoring position. Rather, at the end of the photographing cycle, the interrupter 160 is returned to its position covering the opening 159 in the housing 164 . Fig. 20 shows the relative arrangement of the components during the recording cycle, while Fig. 19, as mentioned above, shows the operational state which is taken up at the end of the recording or photographing cycle. If a 32x magnification, ie the lens 113 has been selected for the photographing cycle, the nosepiece 68 will move back again in order to bring the normal lens 130 into the optical path so that it cooperates with the surface vision sensor 161 .

If an image area of the image card is to be viewed, the button labeled "monitor" for the control image on the keyboard in Fig. 18 can be pressed to move the rotatable mirror 58 to the position shown in Fig. 21 in which the device works in image control mode. Simultaneously with the rotation of the mirror 58 , the interrupter 160 is actuated to pull the sensor 161 from the opening 159 . When returning to the recording mode of operation, the button labeled "monitor" may be pressed a second time, provided that the switch is an alternate ON-OFF switch or two-way switch to return the devices to the operational position shown in FIG Fig. 19 is shown.

If the signal light 166 lights up for an already exposed image area because there is an exposed image area under the sensor 161 , the film card can be transported further to the next image area by the button labeled "Exposed Frame" for an already exposed image on the keyboard is pressed in Fig. 18. This function of transporting the image card is the same as that described in the previous embodiment in the previous embodiments.

If the image card is to be removed from the device, the button labeled "Unload" for card output is pressed in all the exemplary embodiments described. The card carrier will gradually move to a middle position and advance to the access slot 38 in the front of the device.

In a preferred embodiment of the invention the entire image area on an image card that is an image can accommodate a size of approximately 9.119 × 11.735 mm. A reduction of a field of 21.6 × 27.9 cm around that 25 times leads to an area that is approximately 8.636 × Measures 11.176 mm, while a 32-fold reduction of one Field of 27.9 × 35.6 cm to an area of approximately 8.731 × 11.113 mm leads. It therefore remains a narrow one unused edge area. If there is an appropriate mark located on the template holder, which per on this edge area is being jicated or if there is another facility there a marker is developed whenever an image is added to the audible image area is imprinted, the presence be the image of the marking in the border area by a Suitable sensor can be determined, which is another possibility represents a display for an already exposed Deliver image.

Claims (11)

1. recording and reproducing device for sheet-shaped originals using transparent, photoplastic film material with a template holding station, a lighting device for a in the original holding station arranged template, a first projection device for the projection of the original image via a first, optical path in a selectable manner Image area of the transparent, photoplastic film material that can be transported step by step and perpendicular to the first optical path,
a second projection device with a light source with which an image area of the transparent, photoplastic film material can be projected onto a viewing screen via a second optical path for control purposes,
with a device for applying an electrostatic charge to the transparent, photoplastic film material in an image area which is crossed by the first, optical path,
a device for heating the transparent, photo-plastic film material in the selected image area for recording an image and
a control device which can be operated by an operator and which can optionally be used to record or reproduce an image on the transparent, photoplastic film material,
characterized,
that micro film cards are used as transparent, photoplastic film material,
that the first and the second optical path starting from the image plane ( 52 ) to a pivotable mirror device ( 58 ) have a common optical path section in which the lens system ( 53 ) of the respective projection device is to be arranged, the light source ( 55 ) the second projection device is located on the side of the image plane ( 52 ) opposite the lens system ( 53 ) and
that the pivotable mirror device ( 58 ) can be switched between a first and a second position, where the common optical path section in the first position is switched on in the first optical path and the second optical path is blocked and in the second position the common optical path Path section switched on in the second optical path and the first optical path is blocked. 2. Apparatus according to claim 1, characterized in that an electrical switching device ( 65 ) can be actuated by the pivotable mirror device ( 58 ) through which the light source ( 55 ) of the second projection device can only be supplied with electrical energy when the pivotable mirror device ( 58 ) is in its second position. 3. Apparatus according to claim 1, characterized in that the lens system ( 130, 131 ) is attached to a bracket ( 68 ) movable along the optical axis of the lens system, that a manually operable actuating device ( 40, 156, 155, 150, 151 , 144, 70 ) is provided, which can be brought into engagement with the holder ( 68 ) for its movement, that the pivotable mirror device ( 58 ) with the actuating device ( 40, 156, 155, 150, 151, 144, 70 ) in such a way is coupled that the actuating device ( 40, 156, 155, 150, 151, 144, 70 ) in the first position of the pivotable mirror device ( 58 ) is disengaged from the holder ( 68 ) and the holder ( 68 ) is in a focus position for the lens system ( 130, 131 ) and in the second position of the pivotable mirror device ( 58 ) the actuating device ( 40, 156, 155, 151, 144, 70 ) is in engagement with the holder ( 68 ) for its movement. 4. Apparatus according to claim 1 or 3, characterized in that a plurality of lens systems ( 130, 131 ) are provided which can optionally be switched on in the optical path section when the pivotable mirror device ( 58 ) is in the first position, and that by the Steuerein direction a predetermined ( 130 ) of the lens systems ( 130, 131 ) in the optical path section can be switched on when the pivotable mirror device ( 58 ) is in the second position. 5. The device according to claim 1, characterized in that the device for applying an electrostatic charge has a housing ( 61 ) with a corona discharge electrode arranged in this ( 125 ), that the housing has a first opening for corona emission, a pressure range ( 120 ) on the outside of the housing ( 61 ), which ends with the first opening and lies in a common plane therewith, and has a second opening ( 121 ) which is arranged opposite the first opening, that the housing ( 61 ) is held above the image plane ( 52 ), the optical path section running through the openings in the housing ( 61 ) that a plate ( 67 ) with an opening ( 102 ), which corresponds essentially to a single image area, is provided , of which at least a part of a microfilm card can be supported, that the housing ( 61 ) has an actuating device ( 66, 114 ) along the optical path section of a first plate ( 6 7 ) raised position can be moved into a second position in which the pressing area ( 120 ) presses against a microfilm card on the plate ( 67 ), the pressing area ( 120 ) pressing the plate ( 67 ) close to the edges of the opening ( 102 ) detected, and that the actuating device ( 66, 114 ) for the housing ( 61 ) is controllable in such a way that the microfilm card is only released for gradual transport. 6. The device according to claim 5, characterized in that the device for heat development on the micro film card a heatable, metallic block element ( 63 ) with a flat surface ( 127 ), which with the flat surface ( 127 ) first in the plate opening ( 102 ) the plate ( 67 ) can be moved in and out of the opening, and has a vacuum device with which in the space defined by the microfilm card, the block element ( 63 ) and the edges of the opening ( 102 ) in the plate ( 67 ) Vacuum can be generated. 7. The device according to claim 6, characterized in that the block element ( 63 ) is formed from its underside with an axial blind bore ( 85 ) that a stift-shaped element ( 81 ) is arranged in the blind bore ( 85 ), on the upper one End the block element ( 63 ) usually sits under the influence of its own weight that the pin-shaped element ( 81 ) is attached at its lower end to an actuating device ( 76, 64, 93, 99, 98, 72 ) with which the block element ( 63 ) in the opening ( 102 ) of the plate ( 67 ) and out of this and laterally this opening ( 102 ) is movable and that at least one lateral passage ( 86, 87 ) is seen before, which the upper end of the blind bore ( 85 ) the pin-shaped member (81) connects in the block member (63) with the outer side of the block member (63) at a location within the space in which the Un is generated terdruck, whereby upon downward movement of otherwise closed passage (86, 8 7 ) open to the ambient air and thus the negative pressure can be removed. 8. Device according to one of the preceding claims, characterized in that the control device under the control of the operator comprises a device which, in functional connection with the electrostatic charge-applying device ( 61, 125 ), which generates the heat for the microfilm device ( 63 ) and the step-by-step holding device and by the operator's instigation the pivotable mirror device ( 58 ) is movable from the second to the first position, whereupon the charge applying device ( 61, 125 ) during a certain time interval can be activated, whereupon the activation of the heat-generating device ( 63 ) can be carried out during a predetermined time interval, the pivotable mirror device ( 58 ) being able to be moved into the second position at the same time as the activation of the heat-generating device ( 83 ) is , and that at the end of the time interval during which the microfilm card is exposed to the heat, the stepwise transportable holding device can be activated in such a way that the film card is transported to the next following image position in accordance with a predetermined pattern. 9. The device according to claim 8, characterized, that a facility is provided with which the asset tion of the gradually transportable holding device is delayed for a certain period of time, so that the Operator the image just created in the image area can control. 10. Device according to one of the preceding claims, characterized in that an optical detection device ( 161 ) is attached to a movable light shutter ( 160 ), which is movable in the common optical path section above the lens system ( 130, 131 ), and that with the detection device ( 161 ) introduced into the optical path section, a signal indicating the presence of an exposed image in the image area of a microfilm card can be generated with which an alarm device can be triggered. 11. The device according to claim 10, characterized in that the optical detection device ( 161 ) responds to the deviating from a flat surface deformation that develops in the exposed image area when this water image area is exposed to heat.