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 photographyInfo
- 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
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.
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)
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)
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)
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 |
-
1956
- 1956-08-17 GB GB25267/56A patent/GB867834A/en not_active Expired
-
1957
- 1957-08-16 US US678466A patent/US3054897A/en not_active Expired - Lifetime
Cited By (1)
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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