GB1165405A - Electrophotography - Google Patents

Electrophotography

Info

Publication number
GB1165405A
GB1165405A GB3132966A GB3132966A GB1165405A GB 1165405 A GB1165405 A GB 1165405A GB 3132966 A GB3132966 A GB 3132966A GB 3132966 A GB3132966 A GB 3132966A GB 1165405 A GB1165405 A GB 1165405A
Authority
GB
United Kingdom
Prior art keywords
electro
photographic
insulating layer
conductive layer
charge
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
GB3132966A
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 GB1165405A publication Critical patent/GB1165405A/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
    • G03G15/226—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 where the image is formed on a dielectric layer covering the photoconductive layer
    • 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/045—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
    • 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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • 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
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0035—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a brush; Details of cleaning brushes, e.g. fibre density
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/08—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic
    • G03G5/087—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being inorganic and being incorporated in an organic bonding material

Abstract

1,165,405. Electro-photographic processes. CANON CAMERA CO. Inc. July 12, 1966 [July 12, 1965; Oct. 28, 1965; Dec.1, 1965; Feb. 23, 1966], No.31329/66. Heading G2H. An electro-photographic member consists of a conductive layer, a photo-conductive layer, and an insulating layer. Either or both the conductive layer and the insulating layer are translu-. cent. The member is such that upon the application to the insulating layer of a positive or negative charge, according to whether the photoconductive layer is N-type or P-type respectively, charges of opposite polarity are even in the absence of activating radiation injected into the photoconductive layer from the conductive layer and bound in the region of the interface between the photo-conductive layer and the insulating layer, and is such that the insulating layer can support said charges without breakdown. Such a member is claimed in Specification 1,165,407. In use the member is charged, then simultaneously imagewise exposed and reverse charged, and then (preferably) uniformly exposed to increase contrast. Dependent upon the construction of the apparatus and of the member, the member may be exposed either through the conductive layer or through the insulating layer. In the apparatus shown in Fig. 11 the electro-photographic member is in the form of a cylinder. Primary charging takes place by means of corona charger 4t. The simultaneous secondary reverse charging and imagewise exposure takes place through the open shield of coratron 8t. Following this the material is uniformly exposed by tungsten illumination 23t. The elctrostatic image is then developed by charged toner particles applied by magnet brush 15t. At the next station the developed image is transferred by coratron 10t to a charge receiving base 11t. This base is then passed over an infrared heated roller 18t to produce the final copy. The electro-photographic cylinder is subjected to an A. C. discharge 20t and remaining developer particles removed by brush 22t. The cycle is thus completed. The alternative apparatus of Fig. 12 and of Fig. 13 (not shown) makes use of an electro-photographic member having an opaque insulating layer. The exposure takes place here through the conductive backing. In use the corona charger 23 is passed across the electro-photographic member B to apply the primary charge from section 23 ab, In the next stage imagewise exposure takes place through the travelling optical system 18b which is scanned across the under surface of the electro-photographic member. Facing magnets 24b and 25b in the optical system and in the corona charger from means by which the corona charger 23 may be synchronously scanned with the optical system during secondary charging from section 23bb., The final stage of overall illumination of the plate B is acheived by means of an internal lamp 21b (not shown). Normal processes of development may then be used to produce a developed image on the upper surface of the electro-photographic member B. The process may of course be used in ordinary daylight. In these processes a high primary charge and high secondary charge give enhanced contrast, but it is possible to degrade the contrast by having an excessive secondary charge.
GB3132966A 1965-07-12 1966-07-12 Electrophotography Expired GB1165405A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP4163965 1965-07-12
JP6578465 1965-10-28
JP40073379 1965-12-01
JP1091566 1966-02-23

Publications (1)

Publication Number Publication Date
GB1165405A true GB1165405A (en) 1969-10-01

Family

ID=27455495

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3132966A Expired GB1165405A (en) 1965-07-12 1966-07-12 Electrophotography
GB1510969A Expired GB1165407A (en) 1965-07-12 1966-07-12 Electrophotography

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1510969A Expired GB1165407A (en) 1965-07-12 1966-07-12 Electrophotography

Country Status (1)

Country Link
GB (2) GB1165405A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299900A (en) 1979-03-09 1981-11-10 Canon Kabushiki Kaisha Electrostatic image magnetic developing process
US4340660A (en) * 1979-04-24 1982-07-20 Canon Kabushiki Kaisha Toner for development having crosslinked polymers
US4499168A (en) * 1979-07-17 1985-02-12 Canon Kabushiki Kaisha Fixing method
US4946755A (en) * 1982-04-01 1990-08-07 Canon Kabushiki Kaisha Electrophotographic one component magnetic toner comprising hydrophobic silica and iron oxide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7803301A (en) * 1978-03-29 1979-10-02 Oce Van Der Grinten Nv ELECTROPHOTOGRAPHIC METHOD.
JP3930873B2 (en) 2004-06-18 2007-06-13 シャープ株式会社 Two-component developer and two-component developing apparatus using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299900A (en) 1979-03-09 1981-11-10 Canon Kabushiki Kaisha Electrostatic image magnetic developing process
US4340660A (en) * 1979-04-24 1982-07-20 Canon Kabushiki Kaisha Toner for development having crosslinked polymers
US4499168A (en) * 1979-07-17 1985-02-12 Canon Kabushiki Kaisha Fixing method
US4946755A (en) * 1982-04-01 1990-08-07 Canon Kabushiki Kaisha Electrophotographic one component magnetic toner comprising hydrophobic silica and iron oxide

Also Published As

Publication number Publication date
GB1165407A (en) 1969-10-01

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Legal Events

Date Code Title Description
PS Patent sealed
433G Case decided by the comptroller ** application refused (sect. 33/1949)
PE Patent expired