GB1369776A - Photocopying apparatus - Google Patents

Photocopying apparatus

Info

Publication number
GB1369776A
GB1369776A GB1355373A GB1355373A GB1369776A GB 1369776 A GB1369776 A GB 1369776A GB 1355373 A GB1355373 A GB 1355373A GB 1355373 A GB1355373 A GB 1355373A GB 1369776 A GB1369776 A GB 1369776A
Authority
GB
United Kingdom
Prior art keywords
photocopying apparatus
photocopying
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
GB1355373A
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB1369776A publication Critical patent/GB1369776A/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
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0275—Arrangements for controlling the area of the photoconductor to be charged
    • 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
    • G03G2215/0436—Document properties at the scanning position, e.g. position and density
    • G03G2215/0441—Manual input of properties
    • 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
    • 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
    • G03G2215/046—Charger

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Rotary Presses (AREA)
GB1355373A 1972-04-17 1973-03-21 Photocopying apparatus Expired GB1369776A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47037745A JPS4912829A (enrdf_load_stackoverflow) 1972-04-17 1972-04-17

Publications (1)

Publication Number Publication Date
GB1369776A true GB1369776A (en) 1974-10-09

Family

ID=12506002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1355373A Expired GB1369776A (en) 1972-04-17 1973-03-21 Photocopying apparatus

Country Status (4)

Country Link
US (1) US3827799A (enrdf_load_stackoverflow)
JP (1) JPS4912829A (enrdf_load_stackoverflow)
DE (1) DE2316387C3 (enrdf_load_stackoverflow)
GB (1) GB1369776A (enrdf_load_stackoverflow)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5820032B2 (ja) * 1974-07-06 1983-04-21 株式会社リコー センコウロコウガタセイデンフクシヤキニオケル ゲンゾウハンイゲンテイソウチ
JPS5172044U (enrdf_load_stackoverflow) * 1974-12-04 1976-06-07
CH607624A5 (en) * 1976-05-14 1978-09-29 Walter Spengler Printer with electrostatic printing ink transfer onto a dielectric substrate
JPS5312334A (en) * 1976-07-20 1978-02-03 Oki Electric Ind Co Ltd Light beam printer
JPS6051709B2 (ja) * 1976-07-23 1985-11-15 沖電気工業株式会社 光ビ−ムプリンタ
JPS5913633Y2 (ja) * 1977-06-30 1984-04-23 株式会社リコー 変倍複写用帯電チャ−ジャ−
US4256400A (en) * 1977-10-08 1981-03-17 Canon Kabushiki Kaisha Copying machine provided with means for selectively setting original base line
JPS5469438A (en) * 1977-11-14 1979-06-04 Ricoh Co Ltd Electrophotographic apparatus
JPS565098Y2 (enrdf_load_stackoverflow) * 1977-12-24 1981-02-04
JPS5494038A (en) * 1978-01-07 1979-07-25 Ricoh Co Ltd Copier for zerography
JPS55121452A (en) * 1979-03-12 1980-09-18 Olympus Optical Co Ltd Electrophotographic apparatus
US4255042A (en) * 1979-03-26 1981-03-10 International Business Machines Corporation Light pipe for accurate erasure of photoconductor charge
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
JPS56146155A (en) * 1980-04-15 1981-11-13 Mita Ind Co Ltd Electrostatic copying machine
JPS5793942U (enrdf_load_stackoverflow) * 1980-11-28 1982-06-09
JPS57105638U (enrdf_load_stackoverflow) * 1980-12-18 1982-06-29
JPS57163253A (en) * 1981-04-01 1982-10-07 Sharp Corp Electrophotographic copier
JPS57163254A (en) * 1981-04-01 1982-10-07 Sharp Corp Electrophotographic copier
JPS57160148U (enrdf_load_stackoverflow) * 1981-04-01 1982-10-07
JPS59228680A (ja) * 1983-06-10 1984-12-22 Sharp Corp 電子写真複写機
DE3601122A1 (de) * 1985-01-18 1986-07-24 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Bilderzeugungsgeraet mit bereichswahl und -bestaetigung
JPS61175631A (ja) * 1985-01-30 1986-08-07 Minolta Camera Co Ltd リ−ダ−・プリンタ−
JPS61180265A (ja) * 1985-02-06 1986-08-12 Toshiba Corp 画像形成装置
US4774593A (en) * 1985-04-19 1988-09-27 Sanyo Electric Co., Ltd. Image forming apparatus
US5521675A (en) * 1995-06-28 1996-05-28 Xerox Corporation Annotation system occluding device for an electrophotographic printing apparatus
EP0855051B1 (de) * 1995-10-09 2001-07-04 Océ Printing Systems GmbH Elektrografischer drucker mit einstellbarer koronaeinrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3556655A (en) * 1968-01-22 1971-01-19 Addressograph Multigraph Photoelectrostatic copying machine
US3578970A (en) * 1968-05-03 1971-05-18 Plastic Coating Corp Variable width corona discharge apparatus with means to shield or vary a predetermined length of a corona discharge wire
AU421643B2 (en) * 1968-11-11 1972-02-23 The Commonwealth Of Australia A method of countour charging
JPS4813446B1 (enrdf_load_stackoverflow) * 1969-03-10 1973-04-27
US3685895A (en) * 1970-05-18 1972-08-22 Opto Graphics Inc Electrophotographic charging easel
US3671121A (en) * 1970-08-05 1972-06-20 Eastman Kodak Co Exposure device for controlling charge on a portion of a charged surface bordering an image frame projected on the charged surface
US3724940A (en) * 1970-12-07 1973-04-03 Ricoh Kk Electrophotographic copying apparatus with means for erasing marginal images
US3751155A (en) * 1971-12-30 1973-08-07 Xerox Corp Pre-development exposure assembly

Also Published As

Publication number Publication date
DE2316387B2 (de) 1975-04-17
DE2316387A1 (de) 1973-10-25
JPS4912829A (enrdf_load_stackoverflow) 1974-02-04
US3827799A (en) 1974-08-06
DE2316387C3 (de) 1975-11-27

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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