GB1570702A - Electrophotographic copying machine - Google Patents

Electrophotographic copying machine Download PDF

Info

Publication number
GB1570702A
GB1570702A GB52157/76A GB5215776A GB1570702A GB 1570702 A GB1570702 A GB 1570702A GB 52157/76 A GB52157/76 A GB 52157/76A GB 5215776 A GB5215776 A GB 5215776A GB 1570702 A GB1570702 A GB 1570702A
Authority
GB
United Kingdom
Prior art keywords
slot
format
photoconductive layer
copying machine
cylinder
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
GB52157/76A
Other languages
English (en)
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.)
Olivetti SpA
TIM SpA
Original Assignee
Olivetti SpA
Ing C Olivetti and C SpA
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 Olivetti SpA, Ing C Olivetti and C SpA filed Critical Olivetti SpA
Publication of GB1570702A publication Critical patent/GB1570702A/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
    • G03G15/04—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
    • G03G15/047—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 for discharging non-image areas
    • 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
    • G03G2215/04—Arrangements for exposing and producing an image
    • G03G2215/0429—Changing or enhancing the image
    • G03G2215/0431—Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0434—Parameters defining the non-image area to be cleaned
    • G03G2215/0443—Copy medium outline relative to the charge image
    • 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
    • G03G2215/04—Arrangements for exposing and producing an image
    • G03G2215/0429—Changing or enhancing the image
    • G03G2215/0431—Producing a clean non-image area, i.e. avoiding show-around effects
    • G03G2215/0448—Charge-erasing means for the non-image area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
GB52157/76A 1976-01-20 1976-12-14 Electrophotographic copying machine Expired GB1570702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67123/76A IT1055822B (it) 1976-01-20 1976-01-20 Macchina copiatrice elettrofotografica

Publications (1)

Publication Number Publication Date
GB1570702A true GB1570702A (en) 1980-07-09

Family

ID=11299778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52157/76A Expired GB1570702A (en) 1976-01-20 1976-12-14 Electrophotographic copying machine

Country Status (6)

Country Link
US (1) US4129378A (enExample)
JP (1) JPS52106745A (enExample)
DE (1) DE2702447A1 (enExample)
FR (1) FR2339192A1 (enExample)
GB (1) GB1570702A (enExample)
IT (1) IT1055822B (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215929A (en) * 1977-09-17 1980-08-05 Canon Kabushiki Kaisha Image forming method and apparatus capable of controlling an electrostatic image formation area
US4256400A (en) * 1977-10-08 1981-03-17 Canon Kabushiki Kaisha Copying machine provided with means for selectively setting original base line
JPS5669666A (en) * 1979-11-12 1981-06-11 Konishiroku Photo Ind Co Ltd Copying machine
US4431301A (en) * 1980-03-12 1984-02-14 Tokyo Shibaura Denki Kabushiki Kaisha Electrostatic copying apparatus with means for preventing contamination of reverse side of copying medium
NL8104461A (nl) * 1981-09-30 1983-04-18 Oce Nederland Bv Belichtingsinrichting.
JPS58162161U (ja) * 1982-04-23 1983-10-28 カシオ計算機株式会社 電子写真複写機の除電装置
JPS59228680A (ja) * 1983-06-10 1984-12-22 Sharp Corp 電子写真複写機
NL8502186A (nl) * 1985-08-05 1987-03-02 Oce Nederland Bv Kopieerapparaat voorzien van instelbare kadreermiddelen.
US4821067A (en) * 1985-10-31 1989-04-11 Kabushiki Kaisha Toshiba Microfilm reader-printer having an image fermation device
US5300985A (en) * 1992-05-29 1994-04-05 Xerox Corporation Multi-function erase lamp
US5459557A (en) * 1992-06-30 1995-10-17 Canon Kabushiki Kaisha Image forming apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1055781A (fr) * 1949-06-22 1954-02-22 Kodak Pathe Appareil pour la reproduction photographique de documents
US2927516A (en) * 1955-12-21 1960-03-08 Ibm Record card controlled electro-graphic printer
US3751155A (en) * 1971-12-30 1973-08-07 Xerox Corp Pre-development exposure assembly
BE793559A (fr) * 1971-12-30 1973-06-29 Xerox Corp Machine electrostatographique comportant un dispositif de pre-developpement d'exposition
US3792913A (en) * 1972-05-12 1974-02-19 Xerox Corp Xerographic erase mechanism
US3860338A (en) * 1973-01-15 1975-01-14 Xerox Corp Adjustable fadeout control
GB1416062A (en) * 1973-03-30 1975-12-03 Xerox Corp Electrostatography
DE2460544A1 (de) * 1974-02-22 1975-08-28 Xerox Corp Elektrostatisches kopiergeraet

Also Published As

Publication number Publication date
FR2339192A1 (fr) 1977-08-19
JPS52106745A (en) 1977-09-07
IT1055822B (it) 1982-01-11
FR2339192B1 (enExample) 1983-06-10
US4129378A (en) 1978-12-12
DE2702447A1 (de) 1977-07-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee