GB1227996A - Improvements in or relating to corona generating apparatus - Google Patents

Improvements in or relating to corona generating apparatus

Info

Publication number
GB1227996A
GB1227996A GB1489468A GB1489468A GB1227996A GB 1227996 A GB1227996 A GB 1227996A GB 1489468 A GB1489468 A GB 1489468A GB 1489468 A GB1489468 A GB 1489468A GB 1227996 A GB1227996 A GB 1227996A
Authority
GB
United Kingdom
Prior art keywords
shield
passage
convergent
discharge
corona
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
GB1489468A
Inventor
Thomas C Whitmore
Peter H Zachmann
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1227996A publication Critical patent/GB1227996A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices
    • 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

Landscapes

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

Abstract

1,227,996. Discharge apparatus. EASTMAN KODAK CO. 28 March, 1968 [3 April, 1967], No. 14894/68. Heading H1X. A shield 35 is attached to the outlet of a corona discharge device producing ionized gas for altering the electrostatic condition of photosensitive material to shield the material from any actinic radiation generated by the discharge, said shield having a convergent passageway 62 with sections 59, 60, 61 at increasing angles of inclination. Pressurized gas, e.g. air, introduced through a flexible connection 22 and passing through apertures 29 in a plastics sleeve 28 is ionized by a corona discharge between a needle 18 and an apertured plate 23 held in position by a spring ring 26. The shield 35 is attached to a metallic sleeve 23 of the discharge device by a set screw 38. The passage 62 is convergent in the cross-section shown and divergent in the orthogonal cross-section, terminating in a narrow slit 64. A breather hole 65 is provided to reduce turbulence, and the walls of the passage 62 may be sand-blasted, painted black, or otherwise treated to eliminate reflection of light. In an alternative embodiment (Fig. 6, not shown) and elongated shield with a convergent passage comprising two sections at increasing angles of inclination is recured to an outlet slit of an elongated casing enclosing a linear array of corona needles.
GB1489468A 1967-04-03 1968-03-28 Improvements in or relating to corona generating apparatus Expired GB1227996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US627990A US3409768A (en) 1967-04-03 1967-04-03 Light lock for air ionizer to shield photosensitive material

Publications (1)

Publication Number Publication Date
GB1227996A true GB1227996A (en) 1971-04-15

Family

ID=24516961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1489468A Expired GB1227996A (en) 1967-04-03 1968-03-28 Improvements in or relating to corona generating apparatus

Country Status (5)

Country Link
US (1) US3409768A (en)
BE (1) BE713102A (en)
DE (2) DE1772116A1 (en)
FR (1) FR1560804A (en)
GB (1) GB1227996A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133224A (en) * 1982-11-19 1984-07-18 Ensign Bickford Ind Inc Corona discharge device
GB2150764A (en) * 1983-11-30 1985-07-03 Xerox Corp Corona charging apparatus and method

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557367A (en) * 1967-09-01 1971-01-19 Xerox Corp Method and apparatus for increasing the efficiency of corona charging of a photoconductor
US3566110A (en) * 1968-02-20 1971-02-23 Rca Corp Electrostatic charging apparatus with means to blow electrostatic charge onto a photoconductive surface from a remotely located corona generator
US3660656A (en) * 1970-08-26 1972-05-02 Eastman Kodak Co Light lock for corona device
US3850519A (en) * 1973-01-12 1974-11-26 Xerox Corp Xerographic image transfer apparatus
JPS5373139A (en) * 1976-12-13 1978-06-29 Ricoh Co Ltd Transfer device
US4156266A (en) * 1978-03-03 1979-05-22 Static Inc. Light free static neutralizer
FR2419647A1 (en) * 1978-03-10 1979-10-05 Onera (Off Nat Aerospatiale) DEVICE FOR PRODUCING A GAS JET CARRIING ELECTRIC CHARGES
US4291226A (en) * 1980-03-10 1981-09-22 Armstrong Cork Company Corona discharge electrode system
FR2690302A1 (en) * 1992-04-17 1993-10-22 Kodak Pathe Cleaning device for strip of unexposed photosensitive product.
US5898484A (en) * 1997-05-30 1999-04-27 Harris; Steven E. Hand-held distance-measurement device with an enhanced viewfinder
JP4430409B2 (en) * 2004-01-19 2010-03-10 株式会社キーエンス Static eliminator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133224A (en) * 1982-11-19 1984-07-18 Ensign Bickford Ind Inc Corona discharge device
US4556795A (en) * 1982-11-19 1985-12-03 Ensign-Bickford Industries, Inc. Corona discharge device
GB2150764A (en) * 1983-11-30 1985-07-03 Xerox Corp Corona charging apparatus and method
US4762997A (en) * 1983-11-30 1988-08-09 Xerox Corporation Fluid jet assisted ion projection charging method

Also Published As

Publication number Publication date
US3409768A (en) 1968-11-05
BE713102A (en) 1968-08-16
DE6608188U (en) 1971-07-15
DE1772116A1 (en) 1970-10-29
FR1560804A (en) 1969-03-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee