EP0207513A1 - Vorrichtung zum Beseitigen von elektrostatischen Ladungen - Google Patents

Vorrichtung zum Beseitigen von elektrostatischen Ladungen Download PDF

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Publication number
EP0207513A1
EP0207513A1 EP86109043A EP86109043A EP0207513A1 EP 0207513 A1 EP0207513 A1 EP 0207513A1 EP 86109043 A EP86109043 A EP 86109043A EP 86109043 A EP86109043 A EP 86109043A EP 0207513 A1 EP0207513 A1 EP 0207513A1
Authority
EP
European Patent Office
Prior art keywords
rollers
strip
electrostatic charges
dielectric
passing
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.)
Granted
Application number
EP86109043A
Other languages
English (en)
French (fr)
Other versions
EP0207513B1 (de
Inventor
Patrice Playe
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.)
ALCATEL BUSINESS SYSTEMS
Original Assignee
La Telephone Industrielle et Commerciale Telic Alcatel SA
Alcatel Business Systemes SA
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 La Telephone Industrielle et Commerciale Telic Alcatel SA, Alcatel Business Systemes SA filed Critical La Telephone Industrielle et Commerciale Telic Alcatel SA
Priority to AT86109043T priority Critical patent/ATE57453T1/de
Publication of EP0207513A1 publication Critical patent/EP0207513A1/de
Application granted granted Critical
Publication of EP0207513B1 publication Critical patent/EP0207513B1/de
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 present invention relates to an erasing device responsible for ensuring the elimination of the electrostatic charges which are likely to be borne by dielectrics in thin strip, in particular those of the film roll type which are used as transfer ribbons. image in electrostatic printers.
  • Thin dielectric bands have the property of being easily electrified when they are in contact with other materials or with themselves during their shaping.
  • the parasitic electric fields thus created have their origin in the electrostatic charges carried on the surface by the dielectric, in the active dipoles created by the molecular chains of the material constituting this dielectric and incidentally by surface doublets.
  • Another known means consists of a metallic wire of small diameter stretched parallel to the surface of the dielectric and subjected to a high alternating voltage which creates by ionization of the ambient air a flow of ions, alternately positive then negative, intended to compensate for the surface charge of one of the two faces of the dielectric by electrostatic attraction.
  • the present invention therefore provides an erasing device for eliminating electrostatic charges for thin strip dielectric.
  • the erasing device comprises at least two electrostatic conducting rollers, forming electrodes, which are subjected to a potential difference by a high alternating voltage and which are parallel so as to make contact transversely and at the same level, each on one side of the thin strip of dielectric flowing between them.
  • the electrostatic charge erasing device presented in FIG. 1 is intended to eliminate any trace of electrostatic charge from a strip of conventional dielectric material 1, coming from a coil, with a view to being used as a temporary recording medium by an electrostatic printer indirect.
  • This indirect electrostatic printer is for example of the model mentioned in French patent n ° 2 524 390 and the strip of dielectric material is intended to serve as an intermediate support for a latent electrostatic image which must be developed and then transferred to a final support, generally paper, on which it is then fixed.
  • the erasing device is then placed between the reel of strip of dielectric material 1 and a latent image printing station associating a print head 2 and a roll counter-electrode 3.
  • the print head 2 is conventionally provided with a plurality of individual electrodes, arranged in one or more lines or in matrix form, which are arranged opposite the counter-electrode on a roll 3.
  • the strip of dielectric material 1 circulates between print head 2 and counter-electrode 3 to receive a latent electrostatic image on that of its faces which comes into contact with the print head, when the latter receives print command signals from a non-circuit shown here.
  • the erasing device according to the invention is therefore placed, in the example proposed, just upstream of the print head 2 so as to remove from the strip of dielectric material 1, before printing, all the parasitic electrostatic charges liable to s 'find there.
  • the erasing device is composed of at least two conductive rollers 4 and 5, forming electrodes, which are parallel and between which the strip of dielectric material 1, here from the coil to the printing head 2, circulates.
  • the roller 4 is constituted by a cylinder of hard conductive material, for example metallic, this cylinder is electrically connected to the ground by means of at least one electrical connector arrangement 6, placed at one end of a carrier shaft 4A of the roller 4, such as a conventional assembly, not shown, of the type with a rotating ring carried by the end of the shaft and a fixed brush placed near a bearing.
  • the roller 5 consists of an electrically conductive cylinder, for example of flexible material of the elastomer or silicone type charged with conductive particles; this cylinder is carried by a metal shaft 5A here mounted idly and connected to an alternating potential V via a second electrical connector arrangement 7.
  • the two rollers 4 and 5 are pressed against each other according to a generator of the cylinder that each one forms.
  • An elastic spring or compressed material assembly provides the necessary pressure according to a conventional arrangement conventional in the material which will not be described further since it is not directly related to the invention.
  • the alternating potential V is supplied by a conventional high-voltage source, not shown, which supplies for example an at least approximately sinusoidal signal, chosen for example from the range 1 kHz-150 kHz, the potential difference applied being of the order of 1500 volts. peak to peak.
  • the strip of dielectric material 1 which circulates between the rollers 4 and 5 is normally interposed between their respective conductive parts so as to avoid direct contact between these parts, the active width of these rollers is therefore generally limited so as to always be less to the width of the strip.
  • one of the rollers is possibly narrower than the other; alternatively insulating rings can be mounted at the ends of the rollers 4, 5, so that the strip is supported by its edges on its rings preventing the conductive parts from coming into contact in the event of slight lateral movement of the strip, during of its movement.
  • the strip of dielectric material 1 which is pressed by one roller against the other under the pressure of a conventional mechanism not shown, penetrates and / or springs between the rollers 4, 5 with a more or less pronounced inclination relative to the plane Q, the trace of which is shown in FIG. 2, which passes between the rollers 4, 5, and which is perpendicular to the plane passing the axes of the shafts 4A, 5A of these rollers.
  • the strip 1 is in contact with more or less of each of these rollers according to this inclination.
  • the introduction and exit of the strip takes place below the plane P passing between the rollers 4 and 5 which is perpendicular to the plane Q passing through the axes of the shafts 4A, 5A so that the tape is applied to a surface of the roller 4 which is greater than that where it is applied to the roller 5.
  • this surface is distributed over the roller 4 on either side of the plane passing through the axes of the shafts 4A, 5A, which makes it possible to obtain two zones of ionic discharge in the air respectively located on either side of this plane, between the roller 5 and the strip of dielectric material 1.
  • FIG. 4 recalls the necessary ionization voltage V, in air at ambient pressure and temperature, as a function of the distance between the electrode brought to the ionization potential and the face of the film facing this electrode and the film thickness e and its dielectric constant. It is shown there that there is ionic discharge over a defined interval of distances L, and consequently elimination of the electrostatic charges carried by the strip at least on the face oriented towards the roller 5.
  • the roller 5 brought to the ionization potential V can be associated with two parallel, conductive rollers, identical, such as 4, arranged for example on either side of the roller 5, so as to allow the successive passage into the same movement of each of the two faces of the strip of dielectric material 1 against the roll 5, between this roll 5 and a different roll linked to the ground for each strip face, the latter then forming a loop, not shown.
  • rollers provided both in this variant and in the example presented in FIG. 1 are conventionally positioned by bearings in a chassis, according to arrangements which are well known in the matter and which are therefore neither shown nor recalled here.

Landscapes

  • Elimination Of Static Electricity (AREA)
  • Advancing Webs (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Solid State Image Pick-Up Elements (AREA)
EP86109043A 1985-07-03 1986-07-03 Vorrichtung zum Beseitigen von elektrostatischen Ladungen Expired - Lifetime EP0207513B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109043T ATE57453T1 (de) 1985-07-03 1986-07-03 Vorrichtung zum beseitigen von elektrostatischen ladungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8510168 1985-07-03
FR8510168A FR2584560B1 (fr) 1985-07-03 1985-07-03 Dispositif effaceur de charges electrostatiques

Publications (2)

Publication Number Publication Date
EP0207513A1 true EP0207513A1 (de) 1987-01-07
EP0207513B1 EP0207513B1 (de) 1990-10-10

Family

ID=9320932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109043A Expired - Lifetime EP0207513B1 (de) 1985-07-03 1986-07-03 Vorrichtung zum Beseitigen von elektrostatischen Ladungen

Country Status (7)

Country Link
US (1) US4831488A (de)
EP (1) EP0207513B1 (de)
JP (1) JPS62503200A (de)
AT (1) ATE57453T1 (de)
DE (1) DE3674842D1 (de)
FR (1) FR2584560B1 (de)
WO (1) WO1987000389A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2119657A2 (de) * 2008-05-15 2009-11-18 Macpi Pressing Division S.P.A. Haftmittelaufbringvorrichtung zum Aufbringen einer Haftverbindung auf Stoffmaterialstücken
WO2012052254A1 (en) * 2010-10-22 2012-04-26 Sca Hygiene Products Ab Apparatus with arc generator for dispensing absorbent sheet products
RU2575695C2 (ru) * 2010-10-22 2016-02-20 Ска Хайджин Продактс Аб Устройство с дуговым генератором для раздачи впитывающих листовых изделий

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS643113U (de) * 1987-06-25 1989-01-10
US4992907A (en) * 1989-05-12 1991-02-12 Hewlett-Packard Company Electrostatic discharge protection system
ES2162531B1 (es) * 1998-05-27 2002-08-01 Serveis De Produccio Empresari Perfeccionamientos en la eliminacion de electricidad estatica en lineas de extrusion.
US7102366B2 (en) * 2001-02-09 2006-09-05 Georgia-Pacific Corporation Proximity detection circuit and method of detecting capacitance changes
ES2253491T3 (es) * 2001-02-09 2006-06-01 Georgia-Pacific Corporation Dispensador de toallas de papel.
US7017856B2 (en) 2001-02-09 2006-03-28 Georgia-Pacific Corporation Static build-up control in dispensing system
US6592067B2 (en) 2001-02-09 2003-07-15 Georgia-Pacific Corporation Minimizing paper waste carousel-style dispenser apparatus, sensor, method and system with proximity sensor
US7341170B2 (en) * 2002-03-07 2008-03-11 Georgia-Pacific Consumer Operations Llc Apparatus and methods usable in connection with dispensing flexible sheet material from a roll
US7553440B2 (en) 2005-05-12 2009-06-30 Leonard William K Method and apparatus for electric treatment of substrates
RU2441566C2 (ru) * 2006-02-18 2012-02-10 Джорджия-Пэсифик Консьюмер Продактс Лп Электронное раздаточное устройство для выдачи листовых изделий
US7878446B2 (en) * 2006-10-20 2011-02-01 Georgia-Pacific Consumer Products Lp Dispenser housing with motorized roller transport
RU2530861C2 (ru) 2010-07-07 2014-10-20 Ска Хайджин Продактс Аб Устройство для раздачи абсорбирующих листовых изделий и способ модификации такого устройства
NL2007783C2 (en) * 2011-11-14 2013-05-16 Fuji Seal Europe Bv Sleeving device and method for arranging tubular sleeves around containers.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1154211A (fr) * 1956-01-30 1958-04-03 Modern Plastic Machinery Corp Procédé et dispositif pour le traitement superficiel des matières plastiques et analogues
FR2002962A1 (de) * 1968-03-19 1969-11-07 Iwasaki Tsushinki
FR2077603A1 (de) * 1970-01-16 1971-10-29 Eastman Kodak Co

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4363070A (en) * 1980-09-02 1982-12-07 Polaroid Corporation Neutralization of electrostatic charges
FR2524390B1 (fr) * 1982-04-02 1986-10-17 Cit Alcatel Imprimante electrostatique indirecte
US4494166A (en) * 1982-09-21 1985-01-15 Xerox Corporation Printing machine with static elimination system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1154211A (fr) * 1956-01-30 1958-04-03 Modern Plastic Machinery Corp Procédé et dispositif pour le traitement superficiel des matières plastiques et analogues
FR2002962A1 (de) * 1968-03-19 1969-11-07 Iwasaki Tsushinki
FR2077603A1 (de) * 1970-01-16 1971-10-29 Eastman Kodak Co

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2119657A2 (de) * 2008-05-15 2009-11-18 Macpi Pressing Division S.P.A. Haftmittelaufbringvorrichtung zum Aufbringen einer Haftverbindung auf Stoffmaterialstücken
EP2119657A3 (de) * 2008-05-15 2011-02-02 Macpi Pressing Division S.P.A. Haftmittelaufbringvorrichtung zum Aufbringen einer Haftverbindung auf Stoffmaterialstücken
WO2012052254A1 (en) * 2010-10-22 2012-04-26 Sca Hygiene Products Ab Apparatus with arc generator for dispensing absorbent sheet products
US8730643B2 (en) 2010-10-22 2014-05-20 Sca Hygiene Products Ab Apparatus with arc generator for dispensing absorbent sheet products
RU2575695C2 (ru) * 2010-10-22 2016-02-20 Ска Хайджин Продактс Аб Устройство с дуговым генератором для раздачи впитывающих листовых изделий
AU2011317767B2 (en) * 2010-10-22 2016-07-07 Essity Hygiene And Health Aktiebolag Apparatus with arc generator for dispensing absorbent sheet products

Also Published As

Publication number Publication date
JPS62503200A (ja) 1987-12-17
DE3674842D1 (de) 1990-11-15
ATE57453T1 (de) 1990-10-15
FR2584560A1 (fr) 1987-01-09
EP0207513B1 (de) 1990-10-10
WO1987000389A1 (fr) 1987-01-15
US4831488A (en) 1989-05-16
FR2584560B1 (fr) 1990-05-11

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