GB1374923A - Electrostatic reproduction apparatus - Google Patents

Electrostatic reproduction apparatus

Info

Publication number
GB1374923A
GB1374923A GB346472A GB346472A GB1374923A GB 1374923 A GB1374923 A GB 1374923A GB 346472 A GB346472 A GB 346472A GB 346472 A GB346472 A GB 346472A GB 1374923 A GB1374923 A GB 1374923A
Authority
GB
United Kingdom
Prior art keywords
copy sheet
image
toner
point
electrostatic
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
GB346472A
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of GB1374923A publication Critical patent/GB1374923A/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
    • G03G15/70—Detecting malfunctions relating to paper handling, e.g. jams
    • G03G15/706—Detecting missed stripping form xerographic drum, band or plate

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Printing Methods (AREA)
  • Cleaning In Electrography (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Abstract

1374923 Stripping sheets XEROX CORP 2.5 Jan 1972 [1 Feb 1971] 3464/72 Heading B8R [Also in Division G2] An electrostatic printing apparatus comprises an image-bearing surface 14, on which an electrostatic latent image is formed, either electrophotographically or by imagewise charging, and is developed by application of a toner, together with an electrical detector by which the presence of a copy sheet on the surface 14 can be established if one remains on the surface 14 beyond a point at which the copy sheet should have been removed with the developed image. The surface 14 may be cylindrical and revolve, and be of photoconductive material over a grounded conductive backing. If a copy sheet which has received a toner image while held on the surface 14 is not removed by air blast nozzles 24 it continues with the revolving surface to a corona discharge apparatus 27, which usually imposes an electrostatic charge on the surface and on any untransferred toner to assist removal of untransferred toner. The apparatus 27 is fed by an A.C. source 33A, biased by a D.C. source 33B so that in normal use no negative voltage appears at the terminal A, but if a copy sheet appears between the apparatus 27 and the surface 14 it interferes with the current flow from the apparatus 27 to the surface 14, and causes a portion of the A.C. profile at point A to go negative. A half wave diode rectifier 35 then causes a rectified output voltage to appear at point B and to operate a relay 42 which shuts off the printing apparatus.
GB346472A 1971-02-01 1972-01-25 Electrostatic reproduction apparatus Expired GB1374923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11140471A 1971-02-01 1971-02-01

Publications (1)

Publication Number Publication Date
GB1374923A true GB1374923A (en) 1974-11-20

Family

ID=22338347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB346472A Expired GB1374923A (en) 1971-02-01 1972-01-25 Electrostatic reproduction apparatus

Country Status (8)

Country Link
US (1) US3650616A (en)
BE (1) BE778739A (en)
CA (1) CA954181A (en)
DE (1) DE2204445A1 (en)
FR (1) FR2125044A5 (en)
GB (1) GB1374923A (en)
IT (1) IT947120B (en)
NL (1) NL7201261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011203A1 (en) * 1978-11-13 1980-05-28 Hoechst Aktiengesellschaft Device for charging a dielectric layer electrostatically

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH528105A (en) * 1970-09-22 1972-09-15 Agfa Gevaert Ag Electrostatic copier
US3778222A (en) * 1972-09-18 1973-12-11 Xerox Corp Fire prevention apparatus
US5241276A (en) * 1989-04-28 1993-08-31 Kabushiki Kaisha Toshiba Surface potential measuring system
JP2001213546A (en) * 2000-02-03 2001-08-07 Canon Inc Sheet winding sensing device, fixing device, and image forming device
US6744993B2 (en) * 2001-04-24 2004-06-01 Canon Kabushiki Kaisha Sheet winding detecting device and image forming apparatus
US6718146B2 (en) * 2001-04-24 2004-04-06 Canon Kabushiki Kaisha Image forming apparatus and image forming method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3360652A (en) * 1964-10-14 1967-12-26 Xerox Corp Fail safe photoelectric sheet sensing machine control circuit
DE1238492B (en) * 1966-02-14 1967-04-13 R & M Leuze Device for shutting down a sheet processing machine when double sheets or imperfections occur
US3506259A (en) * 1967-10-12 1970-04-14 Xerox Corp Electrostatic sheet detacking apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011203A1 (en) * 1978-11-13 1980-05-28 Hoechst Aktiengesellschaft Device for charging a dielectric layer electrostatically

Also Published As

Publication number Publication date
IT947120B (en) 1973-05-21
CA954181A (en) 1974-09-03
FR2125044A5 (en) 1972-09-22
BE778739A (en) 1972-07-31
US3650616A (en) 1972-03-21
DE2204445A1 (en) 1972-08-10
NL7201261A (en) 1972-08-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees