GB867834A - Process of and apparatus for printing or copying by electro or electrostatic photography - Google Patents

Process of and apparatus for printing or copying by electro or electrostatic photography

Info

Publication number
GB867834A
GB867834A GB25267/56A GB2526756A GB867834A GB 867834 A GB867834 A GB 867834A GB 25267/56 A GB25267/56 A GB 25267/56A GB 2526756 A GB2526756 A GB 2526756A GB 867834 A GB867834 A GB 867834A
Authority
GB
United Kingdom
Prior art keywords
inch
carrier
wires
charging
positive
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
GB25267/56A
Inventor
Raymond George Pritchard
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.)
EN Mason and Sons Ltd
Original Assignee
EN Mason and Sons 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 EN Mason and Sons Ltd filed Critical EN Mason and Sons Ltd
Priority to GB25267/56A priority Critical patent/GB867834A/en
Priority to US678466A priority patent/US3054897A/en
Publication of GB867834A publication Critical patent/GB867834A/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0283—Arrangements for supplying power to the sensitising device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/001—Electric or magnetic imagery, e.g., xerography, electrography, magnetography, etc. Process, composition, or product
    • Y10S430/102—Electrically charging radiation-conductive surface

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Elimination Of Static Electricity (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

867,834. Charging with static electricity. MASON & SONS Ltd., E. N. Aug. 14, 1957 [Aug. 17, 1956], No. 25267/56. Class 35. [Also in Group XXXVI] A photo-sensitive layer on a carrier is electrostatically charged for printing and copying by applying a positive charge to one side and a negative charge to the other, these charges being derived from electronic generators. The charging units consist of wires 20 supported in spring mounts 21 and enclosed in a shield having slots 22 for the carrier. The wires may be of stainless steel or platinum-clad molybdenum of from 0.001 inch to 0.003 inch but tungsten wires 0.002 inch diameter are preferred. They may be spaced 0.875 inch to 1.25 inch from the carrier and have a brass shield 0.5 inch from their plane and between the wires. The negative charging unit, which is on the active side of the carrier is at a greater potential than the positive unit facing the back of the paper and which serves mainly to neutralize the negative charge on the paper. The positive charging potential may be 6-9 k.v. D.C. Both charges are derived from electronic oscillators, preferably operating at about 18 kc/s. and feeding a diode rectifier.
GB25267/56A 1956-08-17 1956-08-17 Process of and apparatus for printing or copying by electro or electrostatic photography Expired GB867834A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB25267/56A GB867834A (en) 1956-08-17 1956-08-17 Process of and apparatus for printing or copying by electro or electrostatic photography
US678466A US3054897A (en) 1956-08-17 1957-08-16 Process of and apparatus for printing or copying by electrostatic photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25267/56A GB867834A (en) 1956-08-17 1956-08-17 Process of and apparatus for printing or copying by electro or electrostatic photography

Publications (1)

Publication Number Publication Date
GB867834A true GB867834A (en) 1961-05-10

Family

ID=10224937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25267/56A Expired GB867834A (en) 1956-08-17 1956-08-17 Process of and apparatus for printing or copying by electro or electrostatic photography

Country Status (2)

Country Link
US (1) US3054897A (en)
GB (1) GB867834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6022654A (en) * 1996-12-28 2000-02-08 Fuji Photo Film Co., Ltd. Production process of lithographic printing plate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339069A (en) * 1964-10-14 1967-08-29 Xerox Corp Corona charging device with means to prevent toner dust contamination
US3414769A (en) * 1966-02-14 1968-12-03 Wabash Magnetics Inc Power supply with simultaneously peaking positive and negative output voltages
US3374348A (en) * 1966-05-09 1968-03-19 Scm Corp Corona unit with a tapered passageway of flectrically nonconductive material betweenconductive housings thatare electrically interconnected

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297691A (en) * 1939-04-04 1942-10-06 Chester F Carlson Electrophotography
US2588699A (en) * 1943-08-27 1952-03-11 Chester F Carlson Electrophotographic apparatus
BE488391A (en) * 1948-04-09
US2777957A (en) * 1950-04-06 1957-01-15 Haloid Co Corona discharge device
US2716826A (en) * 1951-10-24 1955-09-06 Huebner Company Apparatus for reproducing images
US2811465A (en) * 1952-04-30 1957-10-29 Rca Corp Electrostatic printing
US2777745A (en) * 1952-10-04 1957-01-15 Gen Dynamics Corp Electrostatic recording apparatus
BE545664A (en) * 1955-03-03
US2864756A (en) * 1955-06-08 1958-12-16 Modern Plastic Machinery Corp Method and apparatus for the treatment of plastic materials
US2885556A (en) * 1955-08-01 1959-05-05 Haloid Xerox Inc Simultaneous charging device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6022654A (en) * 1996-12-28 2000-02-08 Fuji Photo Film Co., Ltd. Production process of lithographic printing plate

Also Published As

Publication number Publication date
US3054897A (en) 1962-09-18

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