GB1326472A - Apparatus and methods for controlling the electrostatic condition of moving sheet or web material - Google Patents

Apparatus and methods for controlling the electrostatic condition of moving sheet or web material

Info

Publication number
GB1326472A
GB1326472A GB225271A GB225271A GB1326472A GB 1326472 A GB1326472 A GB 1326472A GB 225271 A GB225271 A GB 225271A GB 225271 A GB225271 A GB 225271A GB 1326472 A GB1326472 A GB 1326472A
Authority
GB
United Kingdom
Prior art keywords
roller
web
jan
engaging
electrically conductive
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
GB225271A
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 GB1326472A publication Critical patent/GB1326472A/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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • 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
    • G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
    • G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers

Abstract

1326472 Discharging static electricity from webs EASTMAN KODAK CO 18 Jan 1971 [16 Jan 1970 20 Nov 1970] 2252/71 Heading B8R The electrostatic charge on a moving web 11, e.g. of photographic film or paper, is neutralized or controlled to a desired condition by apparatus including a first roller 13 having-an electrically conductive surface for engaging one side of the web and a second roller 15 having a partiallyconductive surface 17 for engaging the other side of the web; one roller, e.g. roller 13 as shown, is earthed, whilst the other roller 15 is connected to a variable D.C. source 19 having adjusters 21, 23 which can be set so that a direct voltage of the correct sign and magnitude is applied to the roller 15, the value of this voltage being determined either empirically or by means of a meter 25, 27. The roller surface 17 has a resistivity of between 1 Î 10<SP>7</SP> and 1 Î 10<SP>12</SP> ohm per square and is preferably constituted by a cotton velour plush sleeve treated with a surfactant material to make it partially conductive, this property of the surface preventing undesirable sparking should the roller 13 contact the roller 15, as may occur if the web should break or run out. Modifications of the apparatus for treating sheets of material cut from a web, and for treating a web with an electrically conductive coating on one side, are described with reference to Figs. 2 and 3 (not shown).
GB225271A 1970-01-16 1971-01-18 Apparatus and methods for controlling the electrostatic condition of moving sheet or web material Expired GB1326472A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US343470A 1970-01-16 1970-01-16
US9134270A 1970-11-20 1970-11-20

Publications (1)

Publication Number Publication Date
GB1326472A true GB1326472A (en) 1973-08-15

Family

ID=26671743

Family Applications (1)

Application Number Title Priority Date Filing Date
GB225271A Expired GB1326472A (en) 1970-01-16 1971-01-18 Apparatus and methods for controlling the electrostatic condition of moving sheet or web material

Country Status (6)

Country Link
JP (1) JPS4637U (en)
BE (1) BE761667A (en)
CA (1) CA925562A (en)
DE (1) DE7101469U (en)
FR (1) FR2077603B1 (en)
GB (1) GB1326472A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185455A (en) * 1981-05-11 1982-11-15 Toshiba Corp Charging device
JPS62269975A (en) * 1986-12-04 1987-11-24 Toshiba Corp Electrostatic charger

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938238Y2 (en) * 1980-04-15 1984-10-24 株式会社富士通ゼネラル electric washing machine operation box
JPS598710Y2 (en) * 1980-04-15 1984-03-17 株式会社富士通ゼネラル electric washing machine operation box
JPS6019247Y2 (en) * 1980-10-01 1985-06-10 中川機械工業株式会社 door-handle
JPS6016193Y2 (en) * 1980-10-01 1985-05-20 中川機械工業株式会社 door-handle
JPS6113497Y2 (en) * 1980-10-02 1986-04-25
JPS5764754A (en) * 1980-10-08 1982-04-20 Toshiba Corp Charging device
JPS5764753A (en) * 1980-10-08 1982-04-20 Toshiba Corp Charging device
JPS5925177Y2 (en) * 1980-10-17 1984-07-24 兵助 須田 scooping net
JPS5772157A (en) * 1980-10-22 1982-05-06 Toshiba Corp Electrostatic charger
DE3122584A1 (en) * 1981-06-06 1982-12-23 Agfa-Gevaert Ag, 5090 Leverkusen TRANSPORT ROLLER FOR PHOTOGRAPHIC MATERIAL
FR2584560B1 (en) * 1985-07-03 1990-05-11 Telephonie Ind Commerciale ELECTROSTATIC CHARGE ERASER
GB9503849D0 (en) * 1995-02-25 1995-04-19 Kodak Ltd Improvements in or relating to curtain coating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185455A (en) * 1981-05-11 1982-11-15 Toshiba Corp Charging device
JPH0251185B2 (en) * 1981-05-11 1990-11-06 Tokyo Shibaura Electric Co
JPS62269975A (en) * 1986-12-04 1987-11-24 Toshiba Corp Electrostatic charger

Also Published As

Publication number Publication date
BE761667A (en) 1971-06-16
JPS4637U (en) 1971-09-13
DE7101469U (en) 1971-08-26
FR2077603A1 (en) 1971-10-29
CA925562A (en) 1973-05-01
FR2077603B1 (en) 1973-06-08
DE2101904A1 (en) 1971-10-07
DE2101904B2 (en) 1976-01-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee