GB1214149A - Electrostatic copying process - Google Patents

Electrostatic copying process

Info

Publication number
GB1214149A
GB1214149A GB5793067A GB5793067A GB1214149A GB 1214149 A GB1214149 A GB 1214149A GB 5793067 A GB5793067 A GB 5793067A GB 5793067 A GB5793067 A GB 5793067A GB 1214149 A GB1214149 A GB 1214149A
Authority
GB
United Kingdom
Prior art keywords
drum
roller
image
photo
plate
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
Application number
GB5793067A
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.)
Canon Inc
Original Assignee
Canon Camera Co Inc
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 Canon Camera Co Inc filed Critical Canon Camera Co Inc
Publication of GB1214149A publication Critical patent/GB1214149A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
    • 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
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/101—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer for wetting the recording material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Cleaning In Electrography (AREA)

Abstract

1,214,149. Electrostatic copier. CANON CAMERA CO. Inc. Dec.20, 1967 [Dec.24, 1966] No.57930/67. Heading G2H. In an electrostatic copying process, an image is formed on an insulating layer above a photoconductive layer on a photo-sensitive plate, liquid developer containing a toner is applied to the plate, and the developed image transferred by line contacting a sheet of copying material whilst applying a voltage between the copy material and the plate, and the toner is then fixed on the copy material. As shown in Fig.1, a photo-sensitive drum 2 is charged by a D. C. corona device 3, and exposed, at an opposite polarity or A. C. corona device 4, to an image of an original O moving synchronously with the drum, the image being illuminated by a tungsten lamp 5 for increased contrast and being developed at 6 and transferred at 7 to copy paper P, a voltage of polarity depending on the conductivity of the photo-sensitive layer being applied, from source 15 via change over switch 17, between the drum 2 and transfer roller 16. The image is fixed by device 32, and drum cleaned by brushes 8 and dried by blower 9. The drum 2 consists, Fig.2 (not shown) of a plastics insulating layer (2a) on a photo-conductive layer (2b) on a conducting base (2c) and liquid developer (19) is applied to the insulating layer (2a) by a roller (21) a bias voltage being applied between roller (21) and drum (2). Alternatively, developer (19) is applied, Fig.3 (not shown) by a sponge or felt layer (24) on a conductive roller (23), or, Fig.4 (not shown) a block (26) of porous material is dipped in the developer, and its upper surface is placed against the drum (2), or developer may be sprayed on to the drum by a siphon (27), Fig. 5 (not shown). In a second embodiment of the image transfer process, Fig.10 (not shown) guide roller (16) is driven by a roller (33) through a conductive belt (34) and a roller (35) pushes copy material (P) at the same speed as the drum (2). The photo-sensitive plate may be a belt or a plane plate.
GB5793067A 1966-12-24 1967-12-20 Electrostatic copying process Expired GB1214149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8467666 1966-12-24

Publications (1)

Publication Number Publication Date
GB1214149A true GB1214149A (en) 1970-12-02

Family

ID=13837292

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5793067A Expired GB1214149A (en) 1966-12-24 1967-12-20 Electrostatic copying process

Country Status (2)

Country Link
DE (1) DE1597815B2 (en)
GB (1) GB1214149A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179052A1 (en) * 1972-04-06 1973-11-16 Fuji Photo Film Co Ltd
WO2013117219A1 (en) * 2012-02-07 2013-08-15 Hewlett-Packard Indigo Bv Liquid electrophotography

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2179052A1 (en) * 1972-04-06 1973-11-16 Fuji Photo Film Co Ltd
WO2013117219A1 (en) * 2012-02-07 2013-08-15 Hewlett-Packard Indigo Bv Liquid electrophotography
US10261437B2 (en) 2012-02-07 2019-04-16 Hp Indigo B.V. Liquid electrophotograpy
US10423094B2 (en) 2012-02-07 2019-09-24 Hp Indigo B.V. Liquid electrophotography
EP2812759B1 (en) * 2012-02-07 2020-07-22 HP Indigo B.V. Liquid electrophotography

Also Published As

Publication number Publication date
DE1597815C3 (en) 1974-12-05
DE1597815A1 (en) 1971-11-04
DE1597815B2 (en) 1974-04-04

Similar Documents

Publication Publication Date Title
US3520604A (en) Photoelectrostatic copier
GB1445671A (en) Transferring charged particles
US3981267A (en) Electrophotographic liquid developing system
GB1076625A (en) Improvements in electrostatic printing
US3216844A (en) Method of developing electrostatic image with photoconductive donor member
US3332396A (en) Xerographic developing apparatus with controlled corona means
US3707138A (en) Apparatus for transferring a developed image from a photosensitive member to a receiver
US4686936A (en) Liquid development system
US3751155A (en) Pre-development exposure assembly
US4027960A (en) Transfer system for electrostatic reproduction machine
US3492476A (en) Electrostatic charging device utilizing both a.c. and d.c. fields
CA1046268A (en) Continuous bias control for electrographic development apparatus
US3543022A (en) Method and apparatus for charging discrete small areas of xerographic plates to different potentials in continuous tone printing
GB1236056A (en) Electrophotographic copier
US3817615A (en) Device for preventing soiling of the trailing end portion of a transfer sheet
GB2036605A (en) Developing latent electrostatic images
GB1433350A (en) Process and apparatus for electrophotographic copying by transfer of electrostatic images
GB1214149A (en) Electrostatic copying process
US4161360A (en) Liquid development apparatus
GB1214512A (en) Developing electrostatic images
GB1023052A (en) Improvements in xerographic fixing apparatus
US3620614A (en) Photoelectrostatic copying machine with corona means establishing a reference potential
US3640249A (en) Transfer apparatus
USRE30477E (en) Electrophotographic liquid developing system
GB1447280A (en) Australia secretary department of supply electrostatic printing method crystallization apparatus

Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years