US3893762A - Master paper winding drum in electrophotographic copying machine of contact printing type - Google Patents

Master paper winding drum in electrophotographic copying machine of contact printing type Download PDF

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Publication number
US3893762A
US3893762A US435989A US43598974A US3893762A US 3893762 A US3893762 A US 3893762A US 435989 A US435989 A US 435989A US 43598974 A US43598974 A US 43598974A US 3893762 A US3893762 A US 3893762A
Authority
US
United States
Prior art keywords
drum
master
image
sheet
original
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
US435989A
Other languages
English (en)
Inventor
Keiichi Inagaki
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.)
Individual
Original Assignee
Individual
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
Priority claimed from JP1350073A external-priority patent/JPS49103637A/ja
Application filed by Individual filed Critical Individual
Priority to US435989A priority Critical patent/US3893762A/en
Priority to FR7403459A priority patent/FR2216610B1/fr
Application granted granted Critical
Publication of US3893762A publication Critical patent/US3893762A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G03G15/60—Apparatus which relate to the handling of originals
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/225—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 using contact-printing
    • 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
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/751—Details relating to xerographic drum, band or plate, e.g. replacing, testing relating to drum
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00172—Apparatus for electrophotographic processes relative to the original handling
    • G03G2215/00177—Apparatus for electrophotographic processes relative to the original handling for scanning
    • G03G2215/00181—Apparatus for electrophotographic processes relative to the original handling for scanning concerning the original's state of motion
    • G03G2215/00189—Apparatus for electrophotographic processes relative to the original handling for scanning concerning the original's state of motion original moving

Definitions

  • ABSTRACT Apparatus for electrophotostatically placing the image of the indicia of an original onto a master sheet and transferring the image to a copy sheet.
  • the apparatus includes a drum having a resilient layer and a flexible electrically conductive outer layer on which the master sheet is mounted.
  • This invention relates to an electrophotographic copying machine of the contact printing type in which a master paper wound on the peripheral surface ofa rotary drum rotating in the state circumscribed with a light exposure drum is subjected to such operations as charging, light exposure, development, transfer and cleaning.
  • FIGS. I and 2 are views showing operation systems of known electrophotographic copying machines of the contact printing type.
  • FIG. 3 is a view illustrating the section of the rotary drum of this invention.
  • FIG. 4 is a view illustrating the operation system of the electrophotographic copying machine provided with the rotary drum of this invention.
  • FIG. 1 illustrates an electrophotographic copying machine of the known contact printing type, in which a master paper mp rotated in an endless manner by means of a plurality of rollers r is charged in a charging zone E, then the master paper is travelled in the state contacted with an original ms on the periphery of a glass cylinder g for light exposure by means of a belt V forwarded by a belt-driving device, to thereby effect printing, and then the master paper is subjected to a series of operations such as development and transfer in zones D and T.
  • FIG. 2 illustrates another known type of an electrophotographic copying machine, in which, as in the case of this invention, a master paper mp is wound on a metal drum md, this metal drum is rotated in the state contacted with a light exposure cylinder, and a series of operations such as charging, light exposure, development, transfer and image erasing are performed during one rotation of the metal drum.
  • the rotary drum on which a master paper is wound is composed of a metal.
  • the metal is a material which can be processed according to the precision method.
  • the metal has a con ductivity necessary for the charging operation.
  • the master paper winding drum of this invention has been achieved. More specifically, as is illustrated in FIG. 3, the central portion of the drum is composed of a cylinder I of a metal or a rigid material, an elastic material 2 having a rich stretchability such as sponge rubber or the like is coated on said cylinder 1, and a thin metal layer or metal net or a vacuum evaporated metal is disposed on the coating 2 as an outermost layer 3.
  • the conductivity necessary for charging the master paper is provided by the outermost thin metal layer, and by virtue of the presence of the intermediate layer of the elastic material rich in stretchability the contact between the drum and light exposure cylinder is not linear but a band-like face-to-face contact is attained.
  • the master paper is forwarded on the fixed passage in the state wound and fixed on the drum, and therefore, there is no apprehension that meandering or slip of the master paper is caused to occur during transporation of the master paper as in the machine of FIG. 1. Further, a mechanism is mounted so that an original is not placed on the joint of the starting and terminal ends of the master paper. Therefore, transportation of the original and interchange of the master paper can be greatly facilitated.
  • the contact between the light exposure cylinder and rotary drum can be converted to a face-to-face contact by contraction of the intermediate layer if the thickness of the intermediate layer is adjusted appropriately, and hence, it is possible to reproduce an image of fine lines completely. Still further, even when the light exposure cylinder is composed of glass inclusive of distortion brought about during the manufacturing step, a clear copied image can be obtained with no fading, and it is unnecessary to heighten the size accuracy as strictly as in the conventional machine and therefore, the manufacturing cost can be reduced.
  • FIG. 4 is a view illustrating the entire operation system of the copying machine in which the rotary drum of this invention is provided.
  • symbols 4, D, T. cl and ch indicate a light exposure glass cylinder, a development device, a transfer device, an image erasing device and a charging device, respectively.
  • An electrophotostatic copying machine of the contact printing type comprising a drum having a rigid central cylinder, an intermediate resilient layer disposed about said central cylinder and a thin flexible electrically conductive outer layer carried by said resilient layer so that the outer surface of said drum is yieldable and electrically conductive, a master sheet mounted on said outer layer of said drum, electrical charging means located adjacent to said drum for imparting an electrical charge to said master sheet, light exposure means disposed adjacent to said drum for transferring an image of the indicia carried by an origi nal onto said master sheet, said light exposure means being in intimate contact with said drum to cause a portion of said outer layer to be deflected and a portion of said intermediate layer to be compressed, means for moving said original between said drum and said light exposure means, means for selectively operating said original moving means so that the image of the original is placed in a predetermined position on the master sheet, an image developing means located adjacent to said drum for developing the image on said master sheet, transfer means located adjacent to said drum.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
US435989A 1973-02-02 1974-01-23 Master paper winding drum in electrophotographic copying machine of contact printing type Expired - Lifetime US3893762A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US435989A US3893762A (en) 1973-02-02 1974-01-23 Master paper winding drum in electrophotographic copying machine of contact printing type
FR7403459A FR2216610B1 (enrdf_load_stackoverflow) 1973-02-02 1974-02-01

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1350073A JPS49103637A (enrdf_load_stackoverflow) 1973-02-02 1973-02-02
US435989A US3893762A (en) 1973-02-02 1974-01-23 Master paper winding drum in electrophotographic copying machine of contact printing type

Publications (1)

Publication Number Publication Date
US3893762A true US3893762A (en) 1975-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US435989A Expired - Lifetime US3893762A (en) 1973-02-02 1974-01-23 Master paper winding drum in electrophotographic copying machine of contact printing type

Country Status (2)

Country Link
US (1) US3893762A (enrdf_load_stackoverflow)
FR (1) FR2216610B1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2335879A1 (fr) * 1975-12-15 1977-07-15 Coulter Information Systems Procede et dispositif pour reproduction ou tirage electrophotographique par contact
US5099284A (en) * 1989-08-28 1992-03-24 Eastman Kodak Company Master sheet and drum assembly
US20150093467A1 (en) * 2012-06-12 2015-04-02 Automatik Plastics Machinery Gmbh Feed roll for strand pelletizers and method for producing such a roll

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490842A (en) * 1966-10-18 1970-01-20 Sunbeam Business Equipment Co Electrophotostatic copying machine
US3612680A (en) * 1968-11-26 1971-10-12 Equipment Dev Corp Reflex to direct photocopying method and apparatus
US3689144A (en) * 1971-01-28 1972-09-05 Arthur L Kaufman Electrostatic copying apparatus employing development on side of the imaging sheet opposite the photoconductive coating

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490842A (en) * 1966-10-18 1970-01-20 Sunbeam Business Equipment Co Electrophotostatic copying machine
US3612680A (en) * 1968-11-26 1971-10-12 Equipment Dev Corp Reflex to direct photocopying method and apparatus
US3689144A (en) * 1971-01-28 1972-09-05 Arthur L Kaufman Electrostatic copying apparatus employing development on side of the imaging sheet opposite the photoconductive coating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2335879A1 (fr) * 1975-12-15 1977-07-15 Coulter Information Systems Procede et dispositif pour reproduction ou tirage electrophotographique par contact
US5099284A (en) * 1989-08-28 1992-03-24 Eastman Kodak Company Master sheet and drum assembly
US20150093467A1 (en) * 2012-06-12 2015-04-02 Automatik Plastics Machinery Gmbh Feed roll for strand pelletizers and method for producing such a roll

Also Published As

Publication number Publication date
FR2216610B1 (enrdf_load_stackoverflow) 1978-02-10
FR2216610A1 (enrdf_load_stackoverflow) 1974-08-30

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