JPS4911139A - - Google Patents

Info

Publication number
JPS4911139A
JPS4911139A JP48026238A JP2623873A JPS4911139A JP S4911139 A JPS4911139 A JP S4911139A JP 48026238 A JP48026238 A JP 48026238A JP 2623873 A JP2623873 A JP 2623873A JP S4911139 A JPS4911139 A JP S4911139A
Authority
JP
Japan
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.)
Granted
Application number
JP48026238A
Other languages
Japanese (ja)
Other versions
JPS5231741B2 (it
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 filed Critical
Publication of JPS4911139A publication Critical patent/JPS4911139A/ja
Publication of JPS5231741B2 publication Critical patent/JPS5231741B2/ja
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
    • G03G2215/0436—Document properties at the scanning position, e.g. position and density
    • 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
    • G03G2215/0463—Exposure lamp used for scanning

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Projection-Type Copiers In General (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
JP48026238A 1972-04-12 1973-03-07 Expired JPS5231741B2 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24313772A 1972-04-12 1972-04-12

Publications (2)

Publication Number Publication Date
JPS4911139A true JPS4911139A (it) 1974-01-31
JPS5231741B2 JPS5231741B2 (it) 1977-08-17

Family

ID=22917482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP48026238A Expired JPS5231741B2 (it) 1972-04-12 1973-03-07

Country Status (6)

Country Link
US (1) US3724942A (it)
JP (1) JPS5231741B2 (it)
CA (1) CA985733A (it)
FR (1) FR2179732B1 (it)
GB (1) GB1374564A (it)
IT (1) IT978354B (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526520U (it) * 1978-08-07 1980-02-20
JPS55135867A (en) * 1979-04-10 1980-10-23 Ricoh Co Ltd Optical device of copying machine
JPS566270A (en) * 1979-06-28 1981-01-22 Sharp Corp Electrophotographic apparatus

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133609A (en) * 1974-05-15 1979-01-09 Minolta Camera Kabushiki Kaisha Charge-erasing device for electrophotographic copying apparatus
US4008954A (en) * 1974-07-15 1977-02-22 Minolta Camera Kabushiki Kaisha Device for extinguishing unnecessary electrostatic charge in electrophotographic copier
JPS5123724A (en) * 1974-08-06 1976-02-25 Ricoh Kk Fukushakitoniokeru suritsutoshomeisochi
US3998541A (en) * 1975-04-18 1976-12-21 Eastman Kodak Company Illumination arrangement providing for interframe flashdown
US3967896A (en) * 1975-05-14 1976-07-06 Rank Xerox Ltd. Variable edge fadeout apparatus for electrostatic reproduction machines
DE2528925A1 (de) * 1975-06-28 1977-01-13 Agfa Gevaert Ag Fotokopiergeraet
US4023896A (en) * 1975-08-07 1977-05-17 Addressograph Multigraph Corporation Clean margin mechanism for electrostatic copiers
NL7510270A (nl) * 1975-09-01 1977-03-03 Oce Van Der Grinten Nv Methode en middelen voor het vermijden van rand- schaduweffekten bij episkopische belichting van een origineel.
JPS5527885Y2 (it) * 1975-09-09 1980-07-03
JPS5328430A (en) * 1976-08-30 1978-03-16 Olympus Optical Co Ltd Shutter o pen-close mechanism for electro-photographic device
US4166692A (en) * 1976-09-14 1979-09-04 Minolta Camera Kabushiki Kaisha Protection and safety device for a photocopying machine
US4086008A (en) * 1976-11-04 1978-04-25 Oce-Van Der Grinten, N.V. Electrophotographic copying apparatus with device for exposing imaged photoconductive plate
JPS53132348A (en) * 1977-04-22 1978-11-18 Minolta Camera Co Ltd Destaticizing method for image non-forming portion of photoreceptor of electrophotographic copier
US4183657A (en) * 1978-04-10 1980-01-15 International Business Machines Corporation Dynamic reference for an image quality control system
US4179213A (en) * 1978-04-10 1979-12-18 International Business Machines Corporation Vector pinning in an electrophotographic machine
US4178095A (en) * 1978-04-10 1979-12-11 International Business Machines Corporation Abnormally low reflectance photoconductor sensing system
GB2058400B (en) * 1979-07-16 1983-12-07 Canon Kk Electrophotographic image forming apparatus
GB2132942B (en) * 1982-09-30 1987-07-29 Canon Kk Detachable parts of image-forming apparatus
US4505575A (en) * 1983-08-26 1985-03-19 Xerox Corporation Non-image erase system for reproduction machines
US5365323A (en) * 1991-09-19 1994-11-15 Canon Kabushiki Kaisha Image recording device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375806A (en) * 1965-05-06 1968-04-02 Xerox Corp Xerographic donor development apparatus
US3556655A (en) * 1968-01-22 1971-01-19 Addressograph Multigraph Photoelectrostatic copying machine
US3540806A (en) * 1968-03-06 1970-11-17 Xerox Corp Half-toning method and apparatus for solid area coverage
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526520U (it) * 1978-08-07 1980-02-20
JPS55135867A (en) * 1979-04-10 1980-10-23 Ricoh Co Ltd Optical device of copying machine
JPS566270A (en) * 1979-06-28 1981-01-22 Sharp Corp Electrophotographic apparatus

Also Published As

Publication number Publication date
GB1374564A (en) 1974-11-20
FR2179732B1 (it) 1976-10-08
JPS5231741B2 (it) 1977-08-17
CA985733A (en) 1976-03-16
FR2179732A1 (it) 1973-11-23
DE2315763A1 (de) 1973-10-25
DE2315763B2 (de) 1976-10-28
US3724942A (en) 1973-04-03
IT978354B (it) 1974-09-20

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