DE2409060A1 - FLAT PRINTER FOR PRINTING FORMS - Google Patents

Description

AKTIENGESELLSCHAFT Munich, February 2nd . 197 4 Berlin and Munich Wittelsbacherplatz 2

74/2012

Flat printer for printing forms

The invention relates to a printing device with small External dimensions and low operating noise for printing "forms or other recording media with varying geometric dimensions.

For printing on tickets, passbooks or other form-like forms Recording media with different geometrical dimensions require printing devices, which are small in size and easy to use. Since such _printer mostly in the public traffic are operated in accessible rooms, they must also work quietly.

To meet these requirements, book and receipt printers are known in which books, receipts or forms can be drawn into the receipt printer and printed with the help of a mechanical device. It happens the actual adjustment of the receipts or forms with the help of an adjustable photocell.

The invention is based on the object of providing a printing device with small external dimensions with which in particular, the printing of forms with widely varying grammages and with varying geometric shapes Dimensions is easily possible. Such a printing device should be quick and easy to use and low Have noises.

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This object is achieved according to the invention through the use of a recording member known per se, which by means of a motorized device in the X and Y directions parallel to a flat receiving surface for a recording medium Is displaceably arranged and a device attached to the recording member for to automatically adjust the distance between the recording organ and the recording medium and a holding and adjusting device for the recording medium is solved.

The advantages achieved by the invention are in particular that the base area due to the flat arrangement of the printer is insignificantly larger than the maximum paper size and therefore the printer can easily be considered Can be run table-top unit with seat operation. When using forms as recording media, these can be fully described over their entire surface. Even when using form sets, the individual layers do not move mutually due to the lack of a paper roller, and it can for this reason no special paper is used. The recording medium remains during the entire printing process lie in the input position and is always fully visible. As in the idle state of the printing device the holding device of the recording medium is not covered at any point is easy and uncomplicated Exchange and adjustment possible. Because, moreover, the recording medium during the entire printing process is not moved, the entire construction is particularly inexpensive and simple.

In a particularly advantageous embodiment, the device is for automatic adjustment of the distance between the recording organ and the recording

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carrier made of at least one movably mounted ball, whose holder is positively connected to the recording member and in which the recording member on a Guide rail is pivotably mounted.

Such a ball, especially if it is in an advantageous holster Way is arranged in the direction of travel in front of the recording member, smooths a possibly wrinkled Form paper in front of the lettering, so that there is always a clear typeface. By using The recording organ needs a ball when changing the writing direction or, for example, when changing lines, cannot be lifted off the recording medium and can be accessed on this Way at the same time serve as a support for the recording organ.

When using pressure-sensitive paper as a recording medium or with simultaneous creation of strike-through is in place in a further embodiment the barrel ball arranged a roller. Due to their wide contact surface and the resulting low surface pressure a possible formation of tracks on the recording medium is avoided.

When using the invention in open-plan offices or rooms accessible to the public, particular must be the low noise level of the printing device is important. This is achieved with an embodiment according to the invention achieved that the receiving surface of the holding and adjusting device for the recording medium on a movable carriage is attached and that for printing the carriage along guide rails in the manner of a Drawer is introduced into the soundproofed closed printing device.

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By using a sled you can isolate yourself from the noise completed embodiment of the printer to the use of a special optoelectronic Adjusting device or similar devices are dispensed with, so that here too the recording medium can be inserted and adjusted in a simple manner by hand and thus the entire printing device in particular is inexpensive to manufacture.

To reinforce the noise isolation is another Embodiment the planar receiving surface for the recording medium is built up in layers so that it absorbs noise and the guide rails on which the receiving surface is movably supported are on the device housing elastically attached. Due to the layered structure of the flat receiving surface, in the case of the between two fixed If a viscoelastic layer is attached to the plates, the writing noise is particularly dampened. To the The guide rails are used to reinforce this effect and to reduce the transfer of structure-borne noise to the housing resiliently attached to the housing.

Embodiments of the invention are shown in the drawings and will be described in more detail below, for example described. Show it

Figure 1 is a plan view of a planographic printer according to the invention,

Figure 2 is a front view of a printer according to the invention,

Figure 3 is a side view of a recording member; FIG. 4 is a front view of a recording member,

FIG. 5 shows a perspective view of a particularly sound-insulated embodiment of one according to the invention Flatbed printer and

FIG. 6 shows a sectional drawing of a noise-insulating embodiment of the receiving surface for the Recording media.

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FIG. 1 shows a plan view of a planographic printer according to the invention. A form to be printed or a corresponding one other cut-to-size recording medium 1 is designed as a clamping device with the aid of a Holding and adjusting device 2 locked and adjusted on the housing of the flat printer so that it cannot move. That designed as a mosaic print head recording member 3 can according to the location to be printed on the form on the one hand be moved along a bridge 4, on the other hand: this bridge 4 is perpendicular to the direction of movement of the The print head is slidably mounted on two guide rails 5. This arrangement makes it possible to print the entire form completely and without a margin. The real one Moving the print head in the longitudinal and transverse direction: is done by a motor, not shown here, which is controlled depending on characters and lines. To make it easier to adjust the form to be printed, is located in an easily visible position at the lower end of the receiving area in connection with the holding device an adjustment circle on the recording medium.

FIG. 2 shows a front view of the planographic printer, specifically seen from the lower edge of FIG. That on the die Printer electronics and control containing printer base 6 with the help of the holding device 2 locked form 1 and the print head 3, which is mounted transversely displaceably in the bridge 4, can be moved relative to one another in such a way that The view of the recording medium 1 remains unobstructed at all times and in each phase of the printing process. With a such a device, it is possible in a particularly simple and fast manner to print the forms in inserting or replacing the flat printer, the print head being in the position shown in FIG.

FIG. 3 shows a side view of the recording element VPA 9/240/3044 · - 6 -

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and Figure 4 is a front view of the recording member. Within the bridge 4, the recording element 3, which is designed as a mosaic print head, is positioned on a guide rail 7 moved with the help of rollers 8. A pressure roller 9 mounted in front of the print head in the direction of movement ensures regardless of the thickness of the recording medium used during the actual printing process automatically, for the necessary distance between the print head needle 10 and the recording medium 1. Since the roller in front of the print head needle 10 is attached, any unevenness and creases of the recording medium 1 that may occur balanced, so that a particularly clear and clean picture results. With the help of a not shown here The motorized device is the recording member 3 when changing the print line around the axis of the guide rail 7 is pivoted upwards and the pressure rollers 9 are lifted off the recording medium 1. In this condition the recording element 3 is shifted, and the location coordinates of the next line to be printed can be entered will.

In a particularly advantageous embodiment of the recording element, not shown here, there are instead of the rolling balls. In this way, the recording member is freely movable in all directions without it must be lifted from the recording medium for this purpose. When changing the print line, the recording element lies on the recording medium 1 and is with the help of the Bridge moved by one line width.

FIG. 5 shows a perspective view of a particularly sound-insulated embodiment of one according to the invention Flat printer, in which the receiving surface 6 for the recording medium 1 along in the manner of a drawer introduced by guide rails 11 in the flat printer

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can be. By means of a device of this type, the forms to be printed can be processed in a particularly simple manner can be exchanged and adjusted. Special adjustment and retraction devices are not necessary. at Another embodiment is for faster replacement of the recording medium, the receiving surface 6 against an elastic energy store, e.g. a Feather introduced into the planographic printer and with the help of an electromagnetic holding device, not shown here locked. After the printing process has ended, this holding device is released and the receiving surface 6 jumps out of the flat printer under the effect of the elastic energy store and is in this way to be renewed Ready to receive a form to be printed.

FIG. 6 shows a sectional drawing of a noise-insulating embodiment of the receiving surface for the recording medium. In this case, the receiving surface 6 consists of three layers - namely two solid support layers 12 and a viscoelastic layer 13 with a high internal loss factor inserted between the two layers and high modulus of elasticity. Such a layered structure damps in a particularly advantageous manner the writing noise caused by the impact of the type carrier. For further noise insulation and in particular To reduce the transmission of structure-borne noise to the device housing, the receiving surface 6 on the guide rail 11 stored in small areas. The guide rail 11 is in turn elastic in the form of an anti-vibration mount executed; namely is also here between the attachment to the housing 14 and a bearing rail 15 an elastic layer 16, which has a particularly noise-absorbing effect.

Overall, it can be stated that through the interaction VPA 9/240/3044 - 8 -

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With all of these construction elements, the noise of the entire device can be reduced to a minimum.

7 claims
6 figures

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Claims (1)

Sponsorship claims Printing device with small overall dimensions and low operating noise for the printing of forms or other record carriers of varying geometric dimensions, characterized by the use of a known recording element (3) "the means of a motor device in X- and Y-direction parallel to a planar receiving surface" for a recording medium (1) and a device (9) attached to the recording element (3) for automatic adjustment of the distance between the recording element (3) and the recording medium (1) and a holding and adjusting device (2) for the Record carrier (1). * Device according to claim 1, characterized in that that the device for automatically adjusting the distance between the recording member (3) and the recording medium (1) consists of at least one movably mounted ball (9), whose holder is positively connected to the recording member (3) and that the recording member (3) is pivotably mounted on a guide rail (7) is. 3. Device according to one of claims 1 or 2, characterized in that the running ball (9) is movably mounted on the recording member (3) in such a way that when the recording member is moved (3) rolls over the recording medium (1) in front of the recording element (3) in the writing direction. 4. Device according to one of claims 1 to 3 _f, characterized in that rollers are arranged instead of the running balls. VPA 9/240/3044 - 10 - 5 0 9835/0563 5. Device according to one of claims 1 to 4, characterized in that the receiving surface with the holding and adjusting device (2) for the recording medium (1) on a movable one Carriage is attached and that for printing the carriage along guide rails (11) in the manner of a Drawer is introduced into the soundproofed closed printing device. 6. Device according to one of claims 1 to 5 »characterized in that the plane The receiving surface (6) for the recording medium (1) is constructed in layers so that it absorbs noise and that the Guide rails (11), on which the receiving surface is movably mounted, are elastic on the rest of the device are attached. 7. Device according to one of Claims 1 to 6, characterized in that the recording element (3) consists of a mosaic print head. VPA 9/240/3044 509835/0563