US3904875A - Single radiation ray path for thermographic imaging and transfixing or fusing - Google Patents

Single radiation ray path for thermographic imaging and transfixing or fusing Download PDF

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Publication number
US3904875A
US3904875A US428957A US42895773A US3904875A US 3904875 A US3904875 A US 3904875A US 428957 A US428957 A US 428957A US 42895773 A US42895773 A US 42895773A US 3904875 A US3904875 A US 3904875A
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US
United States
Prior art keywords
image
heat sensitive
sensitive member
station
web
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
US428957A
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English (en)
Inventor
James D Rees
James A Critchlow
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to US428957A priority Critical patent/US3904875A/en
Priority to AR256317A priority patent/AR207128A1/es
Priority to CA211,709A priority patent/CA1025661A/en
Priority to DE19742451141 priority patent/DE2451141A1/de
Priority to AU75487/74A priority patent/AU481464B2/en
Priority to NL7415027A priority patent/NL7415027A/xx
Priority to GB4997674A priority patent/GB1463607A/en
Priority to JP49139409A priority patent/JPS5099549A/ja
Priority to IT30960/74A priority patent/IT1027998B/it
Priority to FR7443169A priority patent/FR2256445B1/fr
Application granted granted Critical
Publication of US3904875A publication Critical patent/US3904875A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/30—Details adapted to be combined with processing apparatus

Definitions

  • ABSTRACT A copying machine is provided wherein a heat image is formed on a heat sensitive intermediate member at an imaging station by exposing the same and an original to a radiation source, then moving the intermediate in one direction to a developing station and developing the image thereon with toner particles, and then reversing the direction of movement of the intermediate back along the same path to the imaging station whereat a copy medium is brought into engagement with the developed image and heat is applied thereto by the same radiation source and the developed image transferred to the copy medium.
  • the toner particles may be fixed or fused to the heat sensitive member, if desired.
  • imaging and fusing or transfixing stations are equipped with separate radiation sources.
  • separate control mechanisms and transport mechanisms must be provided. and those mechanisms must be synchronized so that the functions at each station are efficiently carried out. Obviously, this requires duplication of parts and a more complicated system.
  • FIG. I is a simplified perspective view of a copying apparatus for carrying out the present invention.
  • FIG. 2 is a view of a gear mechanism for coordinating movement of the web take-up and feed rolls and the developing apparatus
  • FIG. 3 is a fragmentary sectional view of the copying apparatus as seen during an imaging function
  • FIG. 4 is a fragmentary sectional view of the copying apparatus as seen after an image on a web has been developed.
  • FIG. 5 is a fragmentary sectional view of the copying apparatus as seen during transfer and fixing of a powder image from the web to a copy sheet.
  • FIGS. 1 and 2 there is illustrated a copying apparatus having a main frame It) with the front cover removed to show the essential elements thereof. Attached to the main frame It) are a take-up shaft 12, a feed shaft I4 and a pair of-idler rolls l6 and I8. A rotatable shaft 20 is located between the take-up roll I2 and the feed roll I4 and has a hand crank 22 fixedly attached thereto at the front end thereof and a drive gear 24 attached to the rear end thereof. Gears 26 and 28 are fixed to the take-up shafts l2 and I4., respectively. and mesh with the drive gear 24 which is located therebetween.
  • a slip clutch (not shown) is provided to con nect the gear 28 with the shaft I4 whereby upon clockwise rotation of the gear 28, the shaft I4 will be rotated and upon counterclockwise rotation of the gear 28. the gear will slip in relation to the shaft I4.
  • a slip clutch (not shown) interconnects the gear 26 with the take-up shaft I2 whereby upon counterclockwise rotation of the gear 26, the take-up shaft will be rotated and upon clockwise rotation ofthe gear 26, the gear will slip relative to the shaft I2.
  • a chamber comprising an upper curved wall 30, which is a specular or diffuse reflector.
  • side walls 32 and a bottom radiation transparent glass wall 34 is also fixed to the frame 10 and contains therein a pulsed or continuous radiation source, such as a xenon flash lamp or an incandescent lamp 36.
  • the reflector is so designed to distribute the radiation from the lamp 36 uniformly.
  • This chamber will hereinafter be referred to as a combined imaging and transfixing station.
  • a development station comprising a reservoir of ferromagnetic toner particles 38 and a well known magnetic brush 40 which is mounted on the front and rear walls of the reservoir to rotate through the toner particles.
  • a gear 42 is mounted to the rear end of the magnetic brush 40 and intcrmcshes with a rotatable drive transfer gear 44. Rotatable motion of drive gear 24 is imparted to the transfer gear 44 through a link 46 which interconnects gears 24 and 44.
  • Countcrclockwise rotation of the gear 44 will cause clockwise rotation of the gear 42 and thereby the magnetic brush 40. while clockwise rotation of the gear 44 will cause counterclockwise rotation of the gear 42 and thereby counterclockwise rotation of the magnetic brush 40.
  • a web supply roll is secured to the feed shaft I4. Estending from the supply roll there is a web 48 which runs under the glass member 34, over the magnetic brush 40 and to the take-up shaft 12.
  • the web 48 comprises a support coated with a heat sensitive material.
  • the support may be an organic film such as a polyester film, cellulose acetate or triacetate. film coated with a delayed tack adhesive which is normally hard and non-tacky at room temperature, but which, upon being activated by heat to a tacky condition and subsequently cooled to room temperature, thereafter remain tacky for considerable periods of time varying from at least 30 seconds to several days or .more depending upon the particular composition involved.
  • Such delayed tack coatings are well known and can be a mixture of discrete particles ofresin, such as indene resin or esterified resin, and discrete particles of crystalline plasticizer, such as diphenyl phthalate or N- cyclohexyl paratoluene sulfonamide.
  • the particles are bound together into the supporting film by a binder, such as styrene-butadiene copolymer.
  • a binder such as styrene-butadiene copolymer.
  • the crystalline plasticizer component of the mixture is in excess of the resin component.
  • the toner particles 38 comprise thermoplastic particles pigmented with carbon black or other radiation absorbing dyes of pigments, and mixed with iron oxide particles.
  • a pressure plate 50 has a pair of pins 52 at the front and rear sides (not shown) thereof which extend through separate slotted guide member 54 (which are secured to the frame for vertical. slidable movement.
  • a plurality of coil springs 56 are located between the bottom wall of the support frame 10 and the bottom of the pressure plate 50 to urge the pressure plate 50 downwardly away from the glass member 34.
  • a shaft 58 is rotatably mounted on the frame 10 below the pressure plate 50 and has a pair of eccentric cams 60 fixed thereto. The cams 60 engage the bottom surface of the pressure plate 50 at the front and rear thereof.
  • a hand crank 62 is fixed to the front end of the shaft 58 for rotating the cams 60.
  • a removable tray 64 is provided which may be slid in between the pressure plate 50 and the glass plate 34 to then rest on the pressure plate 50.
  • the tray 63 is constructed to fasten an original or a copy sheet on the top surface thereof for the purposes of this invention and to facilitate separation of the sheet from the web should there be any tendency of sticking therebetween.
  • a fresh portion of web 48 is brought into alignment with the imaging and transfixing station by turning the crank 22 in a clockwise direction.
  • An original sheet 64 having an image thereon is placed onto the tray 63 and the cams 60 are manually rotated to move the pressure plate 50 and the tray 63 upwards, thereby bringing the original sheet into contact with the heat sensitive layer of the web 48.
  • the lamp 36 is energized to expose the web and the original image, thereby heating the heat sensitive layer in the areas corresponding to the image to form a tacky image thereon.
  • the lamp 36 is turned off and then the cams 60 are rotated to allow the springs 56 to release the tray 63.
  • the tray 63 is thereafter removed from the apparatus, thereby separating the original sheet from the web 48.
  • crank 22 is then rotated in a clockwise direction thereby driving take-up shaft 12 to move the web 48 past the developer station where the magnetic brush 40 brushes toner particles 38 onto the web 48 to develop the tacky areas thereon corresponding to the image.
  • the crank 22 is turned in the opposite direction .to drivethe feedroll 14 in a clockwise direction to reverse the direction of travel of the web 48 and bring the developed image back to the imaging and transfixing station.
  • a copy sheet 66 is placed onto the tray 63 which, in turn, is remounted on the pressure plate 50.
  • the cams 60 are then turned to lift the pressure plate 50 and the tray 63 upwardly to thereby press the copy sheet against the developed image on the web 48.
  • the lamp 36 is then energized to heat the toner particles whereby a substantial portion thereof are transfixed (transfer and fixed) to the copy sheet to provide a reproduction of the original image. This transfixing occurs due to the pressure between the web 48 and the copy sheet 66 combined with a corresponding proper temperature.
  • the cams are rotated again to release tray 63, and the tray is then removed thereby separating the copy sheet 62 from the web with a copy of the original image thereon.
  • the crank 22 is turned in a clockwise direction to move the used portion of the web 48 out of the combined imaging and transfixing station and to bring an unused portion of the web 48 into alignment with the imaging and transfixing station in preparation for another copying circle during which the above steps are repeated.
  • the developed image may be fused onto the heat sensitive web 48. This may be desired when a series of copies are needed in a specified sequence and a savings of copy paper is desired. In that event, the copy paper is eliminated and the lamp 36 is energized to fuse the toner particles to the web with the tray 63 either removed 'or in a released position. When that is done, the combined imaging and transfixing station becomes a combined'imaging and fusing station.
  • An image copying method comprising the steps of:
  • a method as recited in claim 1 further comprising the step of holding a copy medium in pressure contact with the developed image while said member is being reexposed, whereby said image is transfixed onto said copy medium.
  • said heat sensitive member is a web which is fed from a supply roll to a take-up roll when moved in said one direction and from the take-up roll to the supply roll when moved in the opposite direction, said method further comprising the step of moving the web in said one direction to move an unused portion thereof into position to make a new copy in preparation for each successive copying cycle.
  • thermosensitive member passes the development station while moving in each of said directions.
  • thermographic copier comprising the combination of a first station including a radiant source,
  • said first station further includes means for holding an original bearing an image in pressure contact with said heat sensitive member while said heat sensitive member is being exposed, whereby the image imparted to said heat sensitive member corresponds to the image of said original.
  • said means for holding said original and said heat sensitive member in pressure contact comprises a radiation transparent member positioned between the radiant source and one side of said path, a pressure plate disposed on the opposite side of said path, means for supporting said original between said pressure plate and said path, and means for movingsaid pressure plate toward and away from said transparent member.
  • said first station further includes means for holding a copy medium in pressure copy contact with the developed image on said heat sensitive member while said heat sensitive member is being re-exposed, whereby the developed image is transfixed onto said copy medium.
  • said means for holding said copy medium and said heat sensitive member in pressure contact comprises a radiation transparent member positioned between said radiant source and one side of said path, a pressure plate disposed on the opposite side of said path, means for supporting said copy medium between said pressure plate and said path, and means for moving said pressure plate toward and away from said transparent member.
  • said first station further includes a radiation transparent member positioned between said radiant source and one side of said path, a pressure plate disposed on the opposite side of said path, means for moving said pressure plate toward and away from said transparent member, means for sandwiching an original bearing an image between said pressure plate and said heat sensitive member while said heat sensitive member is being exposed such that the image imparted to said heat sensitive member corresponds to the image of said original, and means for sandwiching a copy medium between said pressure plate and the developed image on sa'd heat sensitive member while said heat sensitive member is being reexposed such that the developed image is transfixed onto said copy medium.
  • said first station further includes means for holding an original bearing an image in pressure contact with said portion of said 7 web during the exposure thereof, whereby the image imparted to said portion of said web corresponds to the image of said original.
  • said means for holding said original in pressure contactwith said portion of said web comprises a radiation transparent member positioned between said radiant source and one side of said path, a pressure plate disposed on the opposite side of said path, means for supporting said original between said pressure plate and said path, and means for moving said pressure plate towards and away from said transparent member.
  • said first station further includes means, for holding a copy medium in pressure contact with the developed image on said portion of said web while said portion is being re-exposed, whereby said image is transfixed onto said copy medium.
  • said means for holding said copy medium in pressure contact with the developed image on said portion of said web comprises a radiation transparent member positioned between said radiant source and one side of said path, a pressure plate disposed on the opposite side of said path, means for supporting said copy medium between said pressure plate and said path, and means for moving said pressure plate towards and away from said transparent member.
  • said first station further includes means for holding selected documents in pressure contact with said portion of said web while said portion is being exposed and re-exposed; said document holding means comprising a radiation transparent member positioned between said radiant source and one side of said path, a pressure plate supported on the opposite side of said path, means for supporting a selected document between said pressure plate and said path, and means for moving said pressure plate towards and away from said transparent member.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
US428957A 1973-12-27 1973-12-27 Single radiation ray path for thermographic imaging and transfixing or fusing Expired - Lifetime US3904875A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US428957A US3904875A (en) 1973-12-27 1973-12-27 Single radiation ray path for thermographic imaging and transfixing or fusing
AR256317A AR207128A1 (es) 1973-12-27 1974-01-01 Aparato copiador
CA211,709A CA1025661A (en) 1973-12-27 1974-10-18 Single radiation ray path for thermographic imaging and transfixing or fusing
DE19742451141 DE2451141A1 (de) 1973-12-27 1974-10-28 Verfahren und vorrichtung zum thermografischen abbilden und transfixieren oder aufschmelzen eines originals
AU75487/74A AU481464B2 (en) 1973-12-27 1974-11-18 Single radiation ray path for thermographic imaging and transfixing or fusing
NL7415027A NL7415027A (nl) 1973-12-27 1974-11-18 Werkwijze en inrichting voor het vervaardigen van een kopie van een origineel beeld door middel van warmte.
GB4997674A GB1463607A (en) 1973-12-27 1974-11-19 Thermographic copying process and apparatus
JP49139409A JPS5099549A (enrdf_load_stackoverflow) 1973-12-27 1974-12-03
IT30960/74A IT1027998B (it) 1973-12-27 1974-12-23 Procedimento per preparare unda copia di un documento originale
FR7443169A FR2256445B1 (enrdf_load_stackoverflow) 1973-12-27 1974-12-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US428957A US3904875A (en) 1973-12-27 1973-12-27 Single radiation ray path for thermographic imaging and transfixing or fusing

Publications (1)

Publication Number Publication Date
US3904875A true US3904875A (en) 1975-09-09

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US428957A Expired - Lifetime US3904875A (en) 1973-12-27 1973-12-27 Single radiation ray path for thermographic imaging and transfixing or fusing

Country Status (9)

Country Link
US (1) US3904875A (enrdf_load_stackoverflow)
JP (1) JPS5099549A (enrdf_load_stackoverflow)
AR (1) AR207128A1 (enrdf_load_stackoverflow)
CA (1) CA1025661A (enrdf_load_stackoverflow)
DE (1) DE2451141A1 (enrdf_load_stackoverflow)
FR (1) FR2256445B1 (enrdf_load_stackoverflow)
GB (1) GB1463607A (enrdf_load_stackoverflow)
IT (1) IT1027998B (enrdf_load_stackoverflow)
NL (1) NL7415027A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184428A (en) * 1976-08-26 1980-01-22 Riso Kagaku Corporation Perforating-printing device for making and using thermal stencils
US4270449A (en) * 1978-03-02 1981-06-02 Toppan Printing Co., Ltd. Method of printing plastic surfaces
US4323775A (en) * 1979-07-30 1982-04-06 Riso Kagaku Corporation Divided exposure method and device
JPS59111885A (ja) * 1982-12-17 1984-06-28 Gakken Co Ltd 小型簡易複写機
US4558331A (en) * 1984-05-07 1985-12-10 Honeywell Inc. Heating resistor shape in a thermal printhead
EP0106663A3 (en) * 1982-10-20 1985-12-18 Xerox Corporation Thermal marking printer system
US5057875A (en) * 1989-01-27 1991-10-15 Oki Electric Industry Co., Ltd. Image forming apparatus provided with an image bearing film and a movable transfixing station
US5084738A (en) * 1989-10-31 1992-01-28 Canon Kabushiki Kaisha Fixing apparatus
US5220388A (en) * 1987-10-08 1993-06-15 Fuji Photo Film Co., Ltd. Method of and apparatus for transferring toner images

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260612A (en) * 1961-07-14 1966-07-12 Eastman Kodak Co Thermographic recording process and heat-sensitive elements therefor
US3617124A (en) * 1969-10-20 1971-11-02 Minnesota Mining & Mfg Electrographic copying machine
US3673961A (en) * 1960-04-27 1972-07-04 Eastman Kodak Co Xerothermographic process
US3684372A (en) * 1969-08-23 1972-08-15 Lumoprint Zindler Kg Copying machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673961A (en) * 1960-04-27 1972-07-04 Eastman Kodak Co Xerothermographic process
US3260612A (en) * 1961-07-14 1966-07-12 Eastman Kodak Co Thermographic recording process and heat-sensitive elements therefor
US3684372A (en) * 1969-08-23 1972-08-15 Lumoprint Zindler Kg Copying machine
US3617124A (en) * 1969-10-20 1971-11-02 Minnesota Mining & Mfg Electrographic copying machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184428A (en) * 1976-08-26 1980-01-22 Riso Kagaku Corporation Perforating-printing device for making and using thermal stencils
US4270449A (en) * 1978-03-02 1981-06-02 Toppan Printing Co., Ltd. Method of printing plastic surfaces
US4323775A (en) * 1979-07-30 1982-04-06 Riso Kagaku Corporation Divided exposure method and device
EP0106663A3 (en) * 1982-10-20 1985-12-18 Xerox Corporation Thermal marking printer system
JPS59111885A (ja) * 1982-12-17 1984-06-28 Gakken Co Ltd 小型簡易複写機
US4558331A (en) * 1984-05-07 1985-12-10 Honeywell Inc. Heating resistor shape in a thermal printhead
US5220388A (en) * 1987-10-08 1993-06-15 Fuji Photo Film Co., Ltd. Method of and apparatus for transferring toner images
US5057875A (en) * 1989-01-27 1991-10-15 Oki Electric Industry Co., Ltd. Image forming apparatus provided with an image bearing film and a movable transfixing station
US5084738A (en) * 1989-10-31 1992-01-28 Canon Kabushiki Kaisha Fixing apparatus

Also Published As

Publication number Publication date
JPS5099549A (enrdf_load_stackoverflow) 1975-08-07
GB1463607A (en) 1977-02-02
FR2256445A1 (enrdf_load_stackoverflow) 1975-07-25
DE2451141A1 (de) 1975-07-10
CA1025661A (en) 1978-02-07
FR2256445B1 (enrdf_load_stackoverflow) 1978-07-13
AR207128A1 (es) 1976-09-15
IT1027998B (it) 1978-12-20
AU7548774A (en) 1976-05-20
NL7415027A (nl) 1975-04-29

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