US3866096A - Charging photoconductive membranes - Google Patents

Charging photoconductive membranes Download PDF

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Publication number
US3866096A
US3866096A US401105A US40110573A US3866096A US 3866096 A US3866096 A US 3866096A US 401105 A US401105 A US 401105A US 40110573 A US40110573 A US 40110573A US 3866096 A US3866096 A US 3866096A
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US
United States
Prior art keywords
gas
charged
corona
charge
photoconductive
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 - Lifetime
Application number
US401105A
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English (en)
Inventor
Kenneth A Metcalfe
Alwin S Clements
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.)
Commonwealth of Australia
Commonwealth of Australia Department of Supply
Original Assignee
Commonwealth of Australia
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 Commonwealth of Australia filed Critical Commonwealth of Australia
Application granted granted Critical
Publication of US3866096A publication Critical patent/US3866096A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/06—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using vacuum drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/10—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment
    • B29C59/12—Surface shaping of articles, e.g. embossing; Apparatus therefor by electric discharge treatment in an environment other than air
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/02—Sensitising, i.e. laying-down a uniform charge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T19/00—Devices providing for corona discharge
    • 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

Definitions

  • the third Australian Patent was Pat. No, 421,643 dated the Nov. 1 1th, 1968 related to a still further improvement in the charging technique in that the corona was again offset from the area being charged to make use of the particular part of the field found to be more desirable.
  • masking members were used which were of a shape such that a uniform charge resulted over the entire workpiece spite of the fact that the point was centrally positioned but shielded to again give a soft charge.
  • An object of the present invention therefore is to provide a method of charging in which charge level is increased and loss of charges by rejection is reduced.
  • the gas stream can be directed on to the nip of a biasing roller with similar effects and is found to minimise defects caused by a hard" charge, and it is particularly useful when using .a shielded wire charge system with a pair of gas streams directed from nozzles which are co-extensive with the charging wire and directed generally in the same direction as the ion stream.
  • a discharge point positioned to face downwards at an angleto the surface to.be charged and adjacent one edge of same is supplied with a direct current voltage of 10,000 volts negative applied between the point and a platen electrode on which the photoconductor medium is supported, spaced at 8 inches from the platen.
  • a stream of oxygen or nitrogen gas or, carbon dioxide, or even air, is directed downward at an angle, to-
  • the gas flow having a velocity of 20 centimeters per second and issuing from a flat'nozzle.
  • FIG. 1 illustrates this principle, the platen being designated at 1, the membrane which is being charged at 2, the charging point at 3, the high voltage supply at 4 and the gas-discharge nozzle at 5.
  • FIG. 2 shows the principle applied to a charging wire, the base electrode being designated at 6, the medium being charged at 7, the charging wire at 8, the directing shield at 9, thehigh voltage generator at 10, and the gas nozzles at 11 and 12. These nozzles are elongatedto be co-extensive with the wire and shield. The nozzles can form part of the shield if required.
  • a method of charging photoconductive membranes which comprise applying a corona-producing voltage between a corona discharge electrode and a base electrode, interposing near the base electrode-a photoconductive membrane to be charged, and'simulbon dioxide.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Elimination Of Static Electricity (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
US401105A 1972-09-28 1973-09-26 Charging photoconductive membranes Expired - Lifetime US3866096A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB062872 1972-09-28

Publications (1)

Publication Number Publication Date
US3866096A true US3866096A (en) 1975-02-11

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ID=3765375

Family Applications (1)

Application Number Title Priority Date Filing Date
US401105A Expired - Lifetime US3866096A (en) 1972-09-28 1973-09-26 Charging photoconductive membranes

Country Status (9)

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US (1) US3866096A (US20080293856A1-20081127-C00139.png)
BE (1) BE805507A (US20080293856A1-20081127-C00139.png)
CA (1) CA979968A (US20080293856A1-20081127-C00139.png)
CH (1) CH568592A5 (US20080293856A1-20081127-C00139.png)
DE (1) DE2348552A1 (US20080293856A1-20081127-C00139.png)
FR (1) FR2201491B1 (US20080293856A1-20081127-C00139.png)
GB (1) GB1416058A (US20080293856A1-20081127-C00139.png)
IT (1) IT996753B (US20080293856A1-20081127-C00139.png)
SE (1) SE386518B (US20080293856A1-20081127-C00139.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6207332B1 (en) * 1996-12-28 2001-03-27 Fuji Photo Film Co., Ltd. Process for producing lithographic printing plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827630A1 (de) * 1988-08-16 1990-02-22 Hoechst Ag Flaechengebilde aus einem substrat und einem ueberzug und verfahren zu seiner herstellung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555378A (en) * 1967-05-15 1971-01-12 Commw Of Australia Charging xerographic images
US3783352A (en) * 1971-08-05 1974-01-01 Canon Kk Developing method for electrophotography

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2153948A1 (en) * 1970-10-29 1972-06-29 Brock A Corona discharge device - for applying low voltage 'cleaning' charge to an electro-photographic surface

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555378A (en) * 1967-05-15 1971-01-12 Commw Of Australia Charging xerographic images
US3783352A (en) * 1971-08-05 1974-01-01 Canon Kk Developing method for electrophotography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6207332B1 (en) * 1996-12-28 2001-03-27 Fuji Photo Film Co., Ltd. Process for producing lithographic printing plate

Also Published As

Publication number Publication date
CA979968A (en) 1975-12-16
SE386518B (sv) 1976-08-09
DE2348552A1 (de) 1974-04-18
GB1416058A (en) 1975-12-03
CH568592A5 (US20080293856A1-20081127-C00139.png) 1975-10-31
FR2201491B1 (US20080293856A1-20081127-C00139.png) 1977-05-27
BE805507A (fr) 1974-01-16
FR2201491A1 (US20080293856A1-20081127-C00139.png) 1974-04-26
IT996753B (it) 1975-12-10

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