US3787706A - Apparatus for the control of charge on a moving web - Google Patents

Apparatus for the control of charge on a moving web Download PDF

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Publication number
US3787706A
US3787706A US00139745A US3787706DA US3787706A US 3787706 A US3787706 A US 3787706A US 00139745 A US00139745 A US 00139745A US 3787706D A US3787706D A US 3787706DA US 3787706 A US3787706 A US 3787706A
Authority
US
United States
Prior art keywords
web
charge
field
roller
electrode roller
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
US00139745A
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English (en)
Inventor
W Degeest
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Application granted granted Critical
Publication of US3787706A publication Critical patent/US3787706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the charge on the wound web is considerably reduced if the charge is controlled by an arrangement which comprises the measuring electrode 15, the electrometer 16, the controller 17, the course 18 which is capable of producing a D.C. output voltage which is a function of the output signal of the controller 17, and a control electrode 1.9 in the form of an electrically conductive roller which is electrically insulated from the ground.
  • the roller 19 has been drawn in tangential contact with the web 10 because hereinbefore the linear web path has been considered between the roller 11 and the roll 12, but it should be understood that the roller 19 will be placed so that the web contacts the roller 19 over an angular part of its periphery, so that an intimate contact occurs between the web and the said roller.
  • means should be provided for controlling the web path from the roller 19 to the electrode 15, so that the distance between the web and the electrode 15 remains constant as the diameter of the roll 12 increases during winding.

Landscapes

  • Elimination Of Static Electricity (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Advancing Webs (AREA)
  • Paper (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US00139745A 1970-05-04 1971-05-03 Apparatus for the control of charge on a moving web Expired - Lifetime US3787706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2136570 1970-05-04

Publications (1)

Publication Number Publication Date
US3787706A true US3787706A (en) 1974-01-22

Family

ID=10161685

Family Applications (1)

Application Number Title Priority Date Filing Date
US00139745A Expired - Lifetime US3787706A (en) 1970-05-04 1971-05-03 Apparatus for the control of charge on a moving web

Country Status (5)

Country Link
US (1) US3787706A (OSRAM)
BE (1) BE766318A (OSRAM)
DE (1) DE2119780A1 (OSRAM)
FR (1) FR2089960A5 (OSRAM)
GB (1) GB1349055A (OSRAM)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863108A (en) * 1973-02-02 1975-01-28 Ici Ltd Electrostatic charge controller
US3887845A (en) * 1973-09-26 1975-06-03 Xerox Corp Copier photoreceptor charge control
US3927356A (en) * 1973-07-13 1975-12-16 Nat Res Dev Yarn detection devices
JPS50151859U (OSRAM) * 1974-06-03 1975-12-17
US4167325A (en) * 1977-11-07 1979-09-11 James River Graphics Inc. Electrographic recording apparatus
US4271451A (en) * 1976-07-20 1981-06-02 Hercules Incorporated Method and apparatus for controlling static charges
US4326796A (en) * 1979-12-13 1982-04-27 International Business Machines Corporation Apparatus and method for measuring and maintaining copy quality in an electrophotographic copier
US4431302A (en) * 1982-02-26 1984-02-14 Coulter Systems Corporation Charge level control for an electrochargeable medium
US4873512A (en) * 1984-03-20 1989-10-10 Westinghouse Electric Corp. Active shaft grounding and diagnotic system
US5041941A (en) * 1989-12-06 1991-08-20 Westvaco Corporation Charge control for EB coated paperboard
US5121285A (en) * 1991-02-11 1992-06-09 Eastman Kodak Company Method and apparatus for eliminating residual charge on plastic sheets having an image formed thereon by a photocopier
US5585730A (en) * 1994-06-20 1996-12-17 Eastman Kodak Company Apparatus for measuring surface charge on a sheet or web
US6368675B1 (en) 2000-04-06 2002-04-09 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
US6475572B2 (en) 2000-04-06 2002-11-05 3M Innovative Properties Company Electrostatically assisted coating method with focused web-borne charges
US20060289692A1 (en) * 2005-06-24 2006-12-28 Horneck Craig F Apparatus for winding paper with static control
US11155431B2 (en) * 2018-04-10 2021-10-26 Gema Switzerland Gmbh Winding machine for web-type materials and method for operating such a winding machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826166A (en) * 1955-05-06 1958-03-11 Research Corp Automatic controlled electrostatic coating apparatus
US2980834A (en) * 1956-04-26 1961-04-18 Bruning Charles Co Inc Charging of photo-conductive insulating material
US3521126A (en) * 1967-07-28 1970-07-21 Addressograph Multigraph Roller charging apparatus
US3671806A (en) * 1970-11-20 1972-06-20 Eastman Kodak Co Method of and apparatus for applying an electrical charge to a moving sheet of flexible material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2826166A (en) * 1955-05-06 1958-03-11 Research Corp Automatic controlled electrostatic coating apparatus
US2980834A (en) * 1956-04-26 1961-04-18 Bruning Charles Co Inc Charging of photo-conductive insulating material
US3521126A (en) * 1967-07-28 1970-07-21 Addressograph Multigraph Roller charging apparatus
US3671806A (en) * 1970-11-20 1972-06-20 Eastman Kodak Co Method of and apparatus for applying an electrical charge to a moving sheet of flexible material

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863108A (en) * 1973-02-02 1975-01-28 Ici Ltd Electrostatic charge controller
US3927356A (en) * 1973-07-13 1975-12-16 Nat Res Dev Yarn detection devices
US3887845A (en) * 1973-09-26 1975-06-03 Xerox Corp Copier photoreceptor charge control
JPS50151859U (OSRAM) * 1974-06-03 1975-12-17
US4271451A (en) * 1976-07-20 1981-06-02 Hercules Incorporated Method and apparatus for controlling static charges
US4167325A (en) * 1977-11-07 1979-09-11 James River Graphics Inc. Electrographic recording apparatus
US4326796A (en) * 1979-12-13 1982-04-27 International Business Machines Corporation Apparatus and method for measuring and maintaining copy quality in an electrophotographic copier
US4431302A (en) * 1982-02-26 1984-02-14 Coulter Systems Corporation Charge level control for an electrochargeable medium
US4873512A (en) * 1984-03-20 1989-10-10 Westinghouse Electric Corp. Active shaft grounding and diagnotic system
US5041941A (en) * 1989-12-06 1991-08-20 Westvaco Corporation Charge control for EB coated paperboard
US5121285A (en) * 1991-02-11 1992-06-09 Eastman Kodak Company Method and apparatus for eliminating residual charge on plastic sheets having an image formed thereon by a photocopier
US5585730A (en) * 1994-06-20 1996-12-17 Eastman Kodak Company Apparatus for measuring surface charge on a sheet or web
US6368675B1 (en) 2000-04-06 2002-04-09 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
US6475572B2 (en) 2000-04-06 2002-11-05 3M Innovative Properties Company Electrostatically assisted coating method with focused web-borne charges
US6666918B2 (en) 2000-04-06 2003-12-23 3M Innovative Properties Company Electrostatically assisted coating apparatus with focused web charge field
US6716286B2 (en) 2000-04-06 2004-04-06 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
US20060289692A1 (en) * 2005-06-24 2006-12-28 Horneck Craig F Apparatus for winding paper with static control
WO2007001610A1 (en) * 2005-06-24 2007-01-04 Kimberly-Clark Worldwide, Inc. Apparatus for winding paper with static control
US7398943B2 (en) 2005-06-24 2008-07-15 Kimberly-Clark Worldwide, Inc. Apparatus for winding paper with static control
US11155431B2 (en) * 2018-04-10 2021-10-26 Gema Switzerland Gmbh Winding machine for web-type materials and method for operating such a winding machine

Also Published As

Publication number Publication date
GB1349055A (en) 1974-03-27
FR2089960A5 (OSRAM) 1972-01-07
DE2119780A1 (de) 1971-11-25
BE766318A (nl) 1971-10-27

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