[go: up one dir, main page]

US3265522A - Method and apparatus for developing latent images - Google Patents

Method and apparatus for developing latent images Download PDF

Info

Publication number
US3265522A
US3265522A US252239A US25223963A US3265522A US 3265522 A US3265522 A US 3265522A US 252239 A US252239 A US 252239A US 25223963 A US25223963 A US 25223963A US 3265522 A US3265522 A US 3265522A
Authority
US
United States
Prior art keywords
ink
strip
copy
powdered
belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US252239A
Other languages
English (en)
Inventor
Games Abraham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imagic Ltd
Original Assignee
Imagic Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imagic Ltd filed Critical Imagic Ltd
Application granted granted Critical
Publication of US3265522A publication Critical patent/US3265522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/398—Processes based on the production of stickiness patterns using powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/02—Dusting, e.g. with an anti-offset powder for obtaining raised printing such as by thermogravure ; Varnishing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/081—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer handling means after the supply and before the regulating, e.g. means for preventing developer blocking

Definitions

  • the vaporizing agents or oils disclosed in my copending application are subject to evaporation or distillation when the original with which theyare in contact is heated.
  • the oils are evaporated from the darker image areas on the original and the vapors are condensed on the copy member surface.
  • the condensed oil constitutes the latent image which is to be developed.
  • Suitable oils include odorless kerosene, essential oils, vegetable oils, glycerines, glycols, hydrogenated terphenyls and others having a suitable boiling pointor boiling point range and which do not injure the original to be copied.
  • a mixture of pigment such as carbon black or colored powder and thermoplastic binder is particularly effective but other agents which will adhere to the ink-retaining image, such as metal powders and chemical materials, are also suitable.
  • the present invention is thus particularly concerned with the application of powdered ink to the surface of a copy sheet bearing an ink-retaining latent image.
  • this latent image is represented by areas of the vaporizing agent but other forms of latent image require development in a similar manner.
  • the image on the copy surface is described as being latent, it is clearthat in view of the vaporizing [agents that may be used to create such a latent image, the ,image is latent in the sense that it is developable rather than in the strict sense that it is invisible.
  • an image created by deposition of glycerine may be discernible or indiscernible' to the unaided eye depending on the amount and purity of the glycerine and on the nature of the copy sheet.
  • an image composed of glycerine is not, therefore, necessarily invisible, that image is developable according to the invention and it is to development of such images to which the invention relates.
  • a device for this purpose comprises guides defining paths for the copy sheet and for a transfer member carryingrpowdered ink, the paths running closely adjacent one another over an inking region in which is situated means for loosening'ink on the transfer member so as to facilitate its retention by the latent image.
  • the copy sheet only needs United States Patent to be fed round the path through the inking region where the latent image picks up powdered ink from the transfer member. The necessity for passing the copy Sheet completely through an ink reservoir is avoided thus improving the overall cleanliness and convenience of the process.
  • the transfer member may itself form part of the device, being constituted for example by an endless belt or roller so as to be capable of movement in a closed path and an ink reservoir for charging the member with ink may be situated in the path away from the inking region.
  • the transfer member may be in the form of a previously inked strip which is fed from a supply reel along the path defined by the guides previously mentioned and thence to a take-up reel.
  • Such a strip docs not form any part of the device itself since it functions in a similar manner to a typewriter ribbon, being used one or more times until the supply of ink is exhausted and then being thrown away and replaced by a fresh strip. AG cordingly the need for a separate ink reservoir is completely eliminated, thus adding to the overall cleanliness of the transfer process.
  • the powderedink carried by the transfer member tends to adhere to the surface of this member, and it is for this reason that the means for loosening the ink is provided in the inking region to facilitate the transfer of the ink to the latent image on the copy 'sheet.
  • This doctor may for example be constituted by the edge of the ink reservoir, if one is provided, or by a blade or wire which serves as one of the guides defining the path of the transfer member.
  • the doctor may merely exert a scraping action on the transfer member, but the loosening effect is enhanced if the transfer member has a rough surface which cooperates with the doctor to create a vibration of the transfer member during movement of the latter. This'vibration helps to loosen'the ink and keeps it in a mobile condition once loosened.
  • the loosening action may be. achieved merely by vibration without any scraping elfect by a doctor and for this purpose the transfer member may be in the form of an endless belt having a rough surface on the side opposite that carrying the ink. This surface then cooperates with a stationary member to create the necessary vibration.
  • the device in another form of device in accordance with the invention utilizing the same general principle of loosening the ink from a transfer member
  • the device comprises an endless strip having a rough surface on one side and which is movable round a substantially horizontal closed path defined between a pair of rollers having substantiallyvertical axes.
  • the strip is folded on itself along its longitudinal axis over at least part of one of the horizontal runs between the rollers with thefold at the bottom and, the rough surface on the outside and the free edges of the folded portion separated to form a trough through which the copy sheet is guided and which has an ink reservoir towards one end.
  • the strip is folded. along the whole of its length so that along one horizontal run the fold is opened to form the trough and on the return run the two folded portions lie fiat against one another.
  • the means for loosening the ink is in the'form of a doctor Altemately, the vibration may be able amount of vibration which maintains the ink in the trough in a free and mobile condition so that it may readily be picked up by the latent image on the copy sheet.
  • the means for loosening is effective to create a pool of loose and mobile ink particles supported by the transfer member which are contacted by the latent image on the copy sheet.
  • FIGURE 1 shows a construction in which the transfer member is in the form of a roller
  • FIGURE 2 shows a construction in which the transfer member is an endless belt and the ink reservoir is a perfo-ratedcylinder;
  • FIGURE 3 shows a construction in which the transfer member is a strip wound between a supply reel and a take-upreel with an ink reservoir in the form of a hopper;
  • FIGURE 4 shows a modification of the construction of FIGURE 3 for use with a pre-inked strip
  • FIGURE 5 shows a modification of the construction of FIGURE 4.
  • FIGURE 6 shows a construction in which the transfer member is an endless belt to which vibration is applied from a support fora copy strip
  • FIGURE 7 shows a modification of the construction of FIGURE 6 in which the support for the copy strip is in the form of an endless belt;
  • FIGURE 8 shows a construction in which the transfer member is an endless belt having a cellular compressible surface layer
  • the copy sheet is shown in the form of a continuous strip which is the case with the apparatus described in the earlier application. If individual copy sheets are to be treated, the continuous copy strip shown in the drawings is replaced by a suitable carrier for the sheets. 1 1
  • the transfer member is in the form of a driving roller 1 having a smooth surface covering of a material such as silicone rubber, silicone- ,treated paper or plastic, or latex to which powdered ink tends to adhere in the form of a thin film.
  • Powdered ink shown at 2 is contained in a reservoir in the form of a hopper 3 shaped to conform with the surface of the roller 1 and formed with.an extension 4 which constitutes a form of guard preventing the dispersal of the ink and maintaining the overall cleanliness of the device.
  • the edge 5 of the hopper 3 bears lightly against the surface of the roller 1 so as to act as a doctor blade which has a slight scraping action and thus serves to loosen the ink on the surface of the roller and to form a small pool 6 of loose ink in a mobile condition.
  • a copy strip 7 is driven to pass around a roller 8 so that its path runs closely adjacent to that of the roller 1 to constitute an inking region in the vicinity of the pool of ink 6. 'Consequently a latent image on the surface of the copy strip picks up powdered ink from the pool 6 and the developed image is indicated diagrammatically at 9.
  • the opposite side of the copy strip does not come into contact with the powdered ink and only the part of the surface bearing the latent image picks up powdered ink so that a high standard of cleanliness is maintained.
  • the copy strip 7 is driven to pass about a roller 8 situated adjacent a pool of powdered ink 6 defining an inking region.
  • the transfer member is constiuted by an endless belt 15 which may for example be made of silicone-treated paper or plastic and which tends to pick up powdered ink in a similar manner to the roller 1.
  • the belt 15 is driven in the direction of the arrows about rollers 16, 17 and 18 i which define part of its path, the remainder of the path being defined by a perforated cylinder 19 and a doctor blade 20.
  • the cylinder 19 constiutes a reservoir for powdered ink 21 which passes outwardly through the perforations and forms a film indicated at 22 on the surface of the belt 15. This film is loosened by the action of the doctor blade 20 to constitute the pool 6 of mobile ink which is then transferred to the latent image to give a developed image 9.
  • a belt shown as 25 is again used but in this case it is not an endless belt.
  • the belt 25 is driven from a supply reel 26 to a take-up reel 27.
  • the copy strip 1 passes around a roller 8 through a pool of mobile ink 6.
  • Theink is supplied to the surface of the belt 25 from a hopper 28.
  • the pool of ink 6 is con stituted by ink loosened by means of a doctor blade 33 which, together with the rollers 31 and 32, defines the path of the strip between the reels 26 and 27.
  • the belt 25 may be replaced by a pre-inked strip which may be used a number of times and then thrown away in the manner of a typewriter ribbon.
  • a pre-inked strip may for example be formed of latex, silicone-treated paper, plastic or grosgrain to which it is found that powdered ink will adhere without becoming appreciably loosened during the storage of the reel of strip.
  • the scraping action of the doctor blade 33 readily provides a pool of mobile ink as already described.
  • FIGURE 4 illustrates specifically a construction using such a pre-inked strip and having no reservoir for powdered ink.
  • the strip 34 is led from a supply reel 35 to a take-up reel 36, passing about a pair of guide rollers 37 and 38 and a pair of doctor wires 39.
  • the strip 34 passes in a horizontal path of travel between the doctor wires 39 and this provides an inking region.
  • the copy strip 7 passes around rollers 40 and 41 defining a corresponding horizontal path, the strip being backed, over the horizontal portion of its path, by a plate 42.
  • the drive to the strip 34 is such as to produce rapid forward and reverse movement of the strip; for example the strip may move forw ard and backwards in steps equal to the width of the inking region with periodic additional forward steps of A or so.
  • each of the doctor wires 39 alternatelyproduces a pool of mobile ink'44 according to the direction of travel of the strip and as a result a layer of ink is caused to move back and forth over the whole horizontal portion of the strip 34 between the doctor wires 39, thus permitting an effec tive transfer of ink to the copy strip 7.
  • a pair of doctor wires 39 produces pools of ink'44 as the result of to-and-fro movement of a belt 45, made of silicone-treated paper or plastic, or grosgrain for example.
  • the belt 45 passes around an ink reservoir in the form of a perforated cylinder 46 and the remainder of its path is defined by guides formed by shaped projections from a unitary member 47, which also supports the cylinder 46.
  • the member 47 is formed of a material having a high slip surface such as polytetrafiuoroethylene, so that the need for individual rollers is avoided.
  • the device is intended for the inking of individual sheets which are supported by carrier wires 48, guided by rollers 49.
  • the fact that the copy material travels in a straight line makes this construction particularly suitable for the inking of individual sheets, although a continuous copy sheet can, of course, replace the wires '48.
  • the inking region is defined by the horizontal part of the path of the'belt 45, over the whole of which ink is maintained in a mobile condition as described in connection with FIGURE 4.
  • FIGURES 6 and 7 In addition to the scraping action of the doctor, whether in the form of a blade asshownin FIGURES 1, 2 and 3 or a wire as shown'in FIGURES'4 and 5, a certainamount of vibration of the transfer member is produced. This wibration' by itself may be sufiieient to loosen the ink without the need for a doctor and this principle is il1ustrated by FIGURES 6 and 7.
  • thetransfermember is inthe form of an endless belt 50 driven around rollers51 52 and 53' and ink is supplied to it from a hopper 54.
  • the copy strip 7 passes around a support in the form of a hollow cylinder 55 having a roughened internal surface as shown at 56.
  • FIG- URE 7 A similar'result is achieved by the construction of FIG- URE 7 in which the belt 50 is guided by rollers 60,61, 62 and 63.
  • a slightly different form of ink reservoir is shown, constituted by a closed container 64 having entrance and exit slits 65 and 66, respectively.
  • the powdered ink is shown as 67 and the belt 50 is guided through the container by means of a rod 68 so that only its upper surface comes into contact with the ink 67.
  • the copy strip 7 is supported by an endless belt 70- capable of movement in a substantially triangular path'defined by rollers 71, 72 and 73.
  • This belt has a roughened internal surface 74 cooperating with two stationary. members 75 to produce a vibration which is transmittedto the belt 50 and thus serves to loosen the ink in the manner already described in connection with FIGURE-5.
  • the cop strip 7 may be replaced by' a carrier'belt for individual copy sheets.
  • the transfer member is constituted by an endless belt having a cellular compressible surface constituted, for example, by soft rubber or polyurethane foam.
  • Ink is supplied to the belt 80 from a hopper 81 and collects in the open cells of the material.
  • the layer of ink carried by the belt is thus discontinuous.
  • the guide rollers for the belt 80 are omitted for simplicity, its path being indicated by the arrow 82.
  • the belt passes around a stationary member 83 so that the tension at this point tends to compress the surface of the belt and thus to loosen the ink by ejecting it from the cells to form a pool of mobile ink 84.
  • the copy strip 7 passes about a roller 8 so as to dip into the pool of mobile ink 84 in the manner previously described.
  • a transfer member is formed by an endless strip 96 which is folded on itself along its longitudinal axis as best seen in FIGURE 9.
  • This material is formed on its outer surface with transverse ribs 91 seen in FIGURE 9 and illustrated diagrammatically in FIGURE 10.
  • the stri may for example be formed of grosgrain which has ribs of a suitable size.
  • the folded strip is driven around a substantially horizontal path defined by a pair of rollers 92 turning about vertical axes. As can be seen from FIGURES 9 and 11 the fold in the strip is at the bottom and in one of the horizontal runs between the rollers 92 the free edges are separated by a spacer 93 to form a trough within which the copy strip 7 is guided by a roller 94.
  • FIGURES 12 and 13 show a final form of device in which the transfer member is formed by an endless belt passing around rollers 101 and having ribbed surfaces I 102 which may for example be fogmed'of grosgrain as previously mentioned. Powdered inkis supplied from a hopper 103 and the belt 101 iscaused to vibrate over the greater part of its upper run by means of stationary blades 104. The copy strip 7 is led around a guide member 105 so as to pass closely adjacent the belt 101 over the region of vibration in which the ink is maintained in a mobile condition so as to be transferred to the latent image in the manner previously described.
  • a device for applying powdered ink to a copy surface having a latent image comprising an ink-retaining substance, said device comprising means to guide a copy surface in a first pre-determined path in said device; means to guide a powdered ink supply member bearing a layer of powdered ink thereon in a second pre-determined path in said device; said first and second paths being closely adjacent at an inking region in said device and disposed such'that, when the device is operative, at least a portion of said copy surface is located above said powdered ink supply member at said inking region; and.
  • ink release means cooperatively arranged to loosen by mechanical action only powdered ink disposed on said powdered ink supply member to form a pool of loose and mobile ink particles at said inking region, said loosened particles being supported on said powdered ink supply member and disposed between said powdered ink 2.
  • said powdered ink supply member comprises a cellular, compressible surface for the reception of powdered ink.
  • a device according to claim '1 wherein said means to guide a powdered ink supply member comprises a supply reel and a take-up reel and said powdered ink supply member is in the form of a strip extending between said supply reel and said take-up reel.
  • said ink release means comprises means to vibrate the powdered ink supply member.
  • a device according to claim 1 wherein the powdered ink supply member has a roughened surface and wherein the ink release means comprises a stationary member 'which' cooperates with said roughened surface to vibrate the powdered ink supply member during movement of the latter.
  • a device wherein the stationary member is a doctor cooperatively arranged to loosen by mechanical action only powdered ink disposed on said powdered ink supply member.
  • a device according to claim 1 wherein said ink release means comprises means to vibrate the copy surface to thereby vibrate said powdered ink supply member.
  • a device for applying powdered ink to a copy surface bearing a latent image comprising an ink-retaining substance, said device comprising means to guide a copy surface in a first pre-determined path in said device; means to guide a powdered ink supply member bearing a layer of powdered ink on a surface thereof in a second pre-determined path in said device; said first and second paths being closely adjacent at an inking region vin said device and disposed such that, when the device is operative, at least a portion of said copy surface is located above the ink-bearing surface of said powdered ink supply member at said inking region; and ink release means comprising a doctor cooperatively arranged to loosen by mechanical action only powdered ink disposed on the surface of said powdered ink supply member to form a pool of loose and mobile ink particles at said inking region, said loosened particles being supported on said powdered ink supply member and disposed between said ink-bearing surface of said powdered ink supplymember and said copy surface
  • a device for applying powdered ink to a copy sursubstance comprising means to guide a copy surface in a first predetermined path in said device; reservoir means to store a supply of powdered ink; means to supply powdered ink from said reservoir means to a powink supply member bearing a layer of said powdered 'ink thereon in a second pre-determined path in said device; said first and second paths being closely adjacent at an inking region in said device and disposed such that, when the device isoperative, at least a portion of said copy surface islocated above said powdered ink supply member; at said inking region; and ink release means cooperatively arranged to loosen by mechanical action only powdered ink disposed on said powdered ink supply memher to form a pool of loose and mobile ink particles at said inking region, said loosened particles being supported on said powdered ink supply member and disposed besurface such that, during operation, mobile ink particles of said pool are brought into contact with and adhere to said ink-retaining
  • a device for applying powdered ink to the surface of a copy sheet bearing an ink-retaining latent image of an ink-retaining substance comprising an endless strip having a rough surface on one side and which deredink supply member; means to guide said powdered .45 face bearing a latent image comprising an ink-retaining tween said powdered ink supply member and said copy is movable in a substantially horizontal closed path defined between a pair of rollers having substantially vertical axes, the strip being folded on itself along its longitudinal axis over at least part of one of the horizontal runs between the rollers with the fold at the bottom, the rough surface on the outside and the free edges of the folded portion separated to form a trough through which the copy sheet is guided, an ink reservoir located adjacent one end of said trough and providing a supply of ink on the walls of said trough, said trough being of such a width that the side adjacent a second of said horizontal runs of said strip bears against the rough surface of the latter, so that when
  • a device in which said strip is folded along the whole length.
  • a device for applying ink to the surface of a copy sheet bearing an ink-retaining latent image of an inkretaining substance comprising: reservoir means to store a supply of powdered ink; first conveyor means to convey a first endless belt member along a'first path; second conveyor means to convey a second endless belt member along a second path such that a portion of said second path is in close proximity to a portion of said first path at aninkiug region and disposed such that, when the device is in operation, said portion of said second path is disposed below said portion of said first path, said second path extending to said reservoir means to enable said second belt member to carry a thin layer of powdered ink from said reservoir means to said inking region; means to feed a copy sheet bearing an ink-retaining latent image into contact with said first belt member, means to maintain said copy sheet adjacent to said first belt member such that the copy sheet is conveyed through said inking region; ink release means at said inking region cooperatively arranged to loosen by mechanical action only powderedink disposed on said
  • said second endless belt member comprises,'on a surface disposed away from said first endless belt member, a rough surface and wherein said ink release means includes a.
  • a device comprises a closed container having entrance and exit slits for said'second endless belt means and guide means to guide said second endless belt member therethrough such that only one surface thereof contacts said powdered ink.
  • a method of developing a liquid, ink-retaining latent image on the surface of a copy sheet comprising 7 9 layer of powdered ink particles to an inking region on a movable ink carrying supply member, removing, by mechanical action only, the ink particles from the ink carrying supply member to maintain a pool of mobile ink particles at said inking region supported by said ink carrying supply member, and moving the latent image surface of the copy member in contact with mobile ink particles of said pool to allow ink particles to adhere to said inkretaining substance on said copy surface at said inking region to develop said latent image.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Photographic Developing Apparatuses (AREA)
US252239A 1962-01-25 1963-01-17 Method and apparatus for developing latent images Expired - Lifetime US3265522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2870/62A GB1031511A (en) 1962-01-25 1962-01-25 Improvements relating to copying processes

Publications (1)

Publication Number Publication Date
US3265522A true US3265522A (en) 1966-08-09

Family

ID=9747553

Family Applications (1)

Application Number Title Priority Date Filing Date
US252239A Expired - Lifetime US3265522A (en) 1962-01-25 1963-01-17 Method and apparatus for developing latent images

Country Status (7)

Country Link
US (1) US3265522A (xx)
CH (1) CH402016A (xx)
DE (1) DE1289429B (xx)
DK (1) DK113405B (xx)
GB (1) GB1031511A (xx)
NL (1) NL288124A (xx)
SE (1) SE309784B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404994A (en) * 1965-02-11 1968-10-08 Arnold G. Gulko Thermographic copying process utilizing recording member with dispersed oil particles
US3444809A (en) * 1965-06-05 1969-05-20 Fuji Photo Film Co Ltd Reproduction process
US3473923A (en) * 1965-04-14 1969-10-21 Fuji Photo Film Co Ltd Reproduction process including transfer and redevelopment of electrostatically formed images
US3661118A (en) * 1971-01-06 1972-05-09 Xerox Corp Electrostatic development
US3841265A (en) * 1972-08-14 1974-10-15 Zerox Corp Developer assembly for electrostatic copier
US3921578A (en) * 1972-07-03 1975-11-25 Itek Corp Power cascade electrophotographic development
FR2366605A1 (fr) * 1976-10-01 1978-04-28 Du Pont Appareil automatique de developpement d'images
US4353637A (en) * 1981-08-31 1982-10-12 Xerox Corporation Development system
US4943816A (en) * 1989-06-14 1990-07-24 International Business Machines Corporation High quality thermal jet printer configuration suitable for producing color images

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2115504A1 (de) * 1970-04-01 1971-10-21 Mihalik N Elektrostatisches Kopiergerat
US3984856A (en) * 1972-07-29 1976-10-05 Hoechst Aktiengesellschaft Process and apparatus for developing diazotype material

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503759A (en) * 1947-08-16 1950-04-11 Eastman Kodak Co Evaporography
US2732775A (en) * 1956-01-31 Continuous direct electrophotographic recorder
US2808777A (en) * 1952-02-26 1957-10-08 Dick Co Ab Method for manufacturing duplicating masters
US2811465A (en) * 1952-04-30 1957-10-29 Rca Corp Electrostatic printing
US2829025A (en) * 1952-04-18 1958-04-01 John E Clemens High speed apparatus for recording intelligence
US2851373A (en) * 1955-11-21 1958-09-09 Bruning Charles Co Inc Developing electrostatic latent images on photo-conductive insulating material
US2895847A (en) * 1953-12-21 1959-07-21 Battelle Development Corp Electric image development
US3008826A (en) * 1958-03-06 1961-11-14 Xerox Corp Xerographic development
US3013890A (en) * 1958-07-08 1961-12-19 Xerox Corp Process of developing electrostatic images and composition therefor
US3081737A (en) * 1961-03-01 1963-03-19 Gen Aniline & Film Corp Xerographic apparatus for applying ferromagnetic powder
US3093039A (en) * 1958-05-12 1963-06-11 Xerox Corp Apparatus for transferring powder images and method therefor
US3098765A (en) * 1959-03-16 1963-07-23 Robertson Photo Mechanix Inc Xerographic brush
US3103445A (en) * 1963-09-10 Method of developing an electrostatic
US3108895A (en) * 1959-12-24 1963-10-29 Burroughs Corp Method and apparatus for erasing developed images
US3117884A (en) * 1955-03-23 1964-01-14 Rca Corp Electrostatic printing process and apparatus
US3140199A (en) * 1961-04-28 1964-07-07 Eastman Kodak Co Vibrating belt powder cloud generator for xerography

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017911B (de) * 1954-10-26 1957-10-17 Rca Corp Material und Verfahren fuer die elektrostatische Bildherstellung und eine Einrichtung zur Durchfuehrung des Verfahrens
BE546297A (xx) * 1955-03-23
DE1039836B (de) * 1956-06-14 1958-09-25 Ibm Deutschland Xerographisches Entwicklungsverfahren
DE1067305B (xx) * 1957-01-18 1959-10-15
DE1080856B (de) * 1957-07-03 1960-04-28 Siemag Feinmech Werke Gmbh Einrichtung an Elektrokopiergeraeten zum Einfaerben von elektrostatisch aufgeladenen elektrophotographischen Stoffbahnen

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732775A (en) * 1956-01-31 Continuous direct electrophotographic recorder
US3103445A (en) * 1963-09-10 Method of developing an electrostatic
US2503759A (en) * 1947-08-16 1950-04-11 Eastman Kodak Co Evaporography
US2808777A (en) * 1952-02-26 1957-10-08 Dick Co Ab Method for manufacturing duplicating masters
US2829025A (en) * 1952-04-18 1958-04-01 John E Clemens High speed apparatus for recording intelligence
US2811465A (en) * 1952-04-30 1957-10-29 Rca Corp Electrostatic printing
US2895847A (en) * 1953-12-21 1959-07-21 Battelle Development Corp Electric image development
US3117884A (en) * 1955-03-23 1964-01-14 Rca Corp Electrostatic printing process and apparatus
US2851373A (en) * 1955-11-21 1958-09-09 Bruning Charles Co Inc Developing electrostatic latent images on photo-conductive insulating material
US3008826A (en) * 1958-03-06 1961-11-14 Xerox Corp Xerographic development
US3093039A (en) * 1958-05-12 1963-06-11 Xerox Corp Apparatus for transferring powder images and method therefor
US3013890A (en) * 1958-07-08 1961-12-19 Xerox Corp Process of developing electrostatic images and composition therefor
US3098765A (en) * 1959-03-16 1963-07-23 Robertson Photo Mechanix Inc Xerographic brush
US3108895A (en) * 1959-12-24 1963-10-29 Burroughs Corp Method and apparatus for erasing developed images
US3081737A (en) * 1961-03-01 1963-03-19 Gen Aniline & Film Corp Xerographic apparatus for applying ferromagnetic powder
US3140199A (en) * 1961-04-28 1964-07-07 Eastman Kodak Co Vibrating belt powder cloud generator for xerography

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404994A (en) * 1965-02-11 1968-10-08 Arnold G. Gulko Thermographic copying process utilizing recording member with dispersed oil particles
US3473923A (en) * 1965-04-14 1969-10-21 Fuji Photo Film Co Ltd Reproduction process including transfer and redevelopment of electrostatically formed images
US3444809A (en) * 1965-06-05 1969-05-20 Fuji Photo Film Co Ltd Reproduction process
US3661118A (en) * 1971-01-06 1972-05-09 Xerox Corp Electrostatic development
US3921578A (en) * 1972-07-03 1975-11-25 Itek Corp Power cascade electrophotographic development
US3841265A (en) * 1972-08-14 1974-10-15 Zerox Corp Developer assembly for electrostatic copier
FR2366605A1 (fr) * 1976-10-01 1978-04-28 Du Pont Appareil automatique de developpement d'images
US4353637A (en) * 1981-08-31 1982-10-12 Xerox Corporation Development system
US4943816A (en) * 1989-06-14 1990-07-24 International Business Machines Corporation High quality thermal jet printer configuration suitable for producing color images

Also Published As

Publication number Publication date
SE309784B (xx) 1969-04-08
DK113405B (da) 1969-03-17
CH402016A (fr) 1965-11-15
NL288124A (xx)
DE1289429B (de) 1969-02-13
GB1031511A (en) 1966-06-02

Similar Documents

Publication Publication Date Title
US3265522A (en) Method and apparatus for developing latent images
US3170395A (en) Duplicating
CA1144821A (en) Method and apparatus for liquid-developing latent electrostatic images
US3368526A (en) Apparatus for developing electrostatic latent images by liquid developing system
JPH0257781B2 (xx)
US3418912A (en) Photographic processing apparatus
DE2223926A1 (de) Elektronischer Lichtbildvervielfältiger des Umdrucktyps
US2878742A (en) Dry type developing tank apparatus
US3698312A (en) Rotary planographic printing press
US3265891A (en) Copy apparatus with means to apply a vaporizing agent to the original prior to exposure to infrared radiation while adjacent a copy sheet
JPS63200176A (ja) 液体像定着・液体キャリヤ除去装置
US3324292A (en) Thermographic copying machine with a series of driven rollers to separate the copy and transfer sheets
DE2800290A1 (de) Verfahren und vorrichtung zum herstellen von elektrostatischen kopien von schriftstuecken
US1891722A (en) Sensitized paper developing apparatus
US1961906A (en) Manifolding attachment for typewriters
US3688112A (en) Addressing apparatus
US3776117A (en) Method and apparatus for developing for diazo type copying machines
US3766887A (en) Developing device for electrostatic latent image
US1789273A (en) Process of ornamenting strip metal
JPS5789987A (en) Screen process printing device
US2090773A (en) Apparatus for multiplying records
JPH0816004A (ja) 湿式電子写真複写機におけるトナー像定着方法
US1825728A (en) Apparatus for developing photographic prints and the like
US4783675A (en) Image recording method
US1745219A (en) Duplicating machine or copygraph and method of operating same