EP0091074A1 - Indirekter elektrostatischer Drucker - Google Patents

Indirekter elektrostatischer Drucker Download PDF

Info

Publication number
EP0091074A1
EP0091074A1 EP83103118A EP83103118A EP0091074A1 EP 0091074 A1 EP0091074 A1 EP 0091074A1 EP 83103118 A EP83103118 A EP 83103118A EP 83103118 A EP83103118 A EP 83103118A EP 0091074 A1 EP0091074 A1 EP 0091074A1
Authority
EP
European Patent Office
Prior art keywords
strip
station
image
roller
support
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
EP83103118A
Other languages
English (en)
French (fr)
Other versions
EP0091074B1 (de
Inventor
Michel Beduchaud
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 Lucent SAS
Original Assignee
Alcatel SA
Compagnie Industrielle de Telecommunication CIT Alcatel SA
Nokia Inc
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 Alcatel SA, Compagnie Industrielle de Telecommunication CIT Alcatel SA, Nokia Inc filed Critical Alcatel SA
Publication of EP0091074A1 publication Critical patent/EP0091074A1/de
Application granted granted Critical
Publication of EP0091074B1 publication Critical patent/EP0091074B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/32—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head
    • G03G15/321—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is formed dotwise, e.g. by a thermal head by charge transfer onto the recording material in accordance with the image
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G03G15/283—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning using a reusable recording medium in form of a band

Definitions

  • the present invention relates to electrostatic printers and more particularly to those using an intermediate support on which a latent electrostatic image is formed and a final support, advantageously made of plain paper, onto which is transferred, after development, the previous latent electrostatic image.
  • the imoression of the image is made directly on a special final support, composed of a conductive substrate on which a dielectric layer a few micrometers thick is deposited.
  • the image printing process is carried out in several successive operations carried out in separate stations assigned to these operations.
  • the latent electrostatic image generated on an intermediate support then developed is transferred to a final support, generally made of paper, on which it is then fixed.
  • the printing steps or operations in these indirect electrostatic printers are carried out by means similar to those used in the successive stations of direct electrostatic printers, that of ink transfer from the intermediate support to the final support being intercalated between image development and fixation.
  • This trans ink ink can advantageously be obtained in an image transfer station, by intimately bringing this final support of plain paper into contact with the latent inked image of the intermediate support, with, if necessary, applying a tension suitable on a so-called transfer electrode placed on the back of the final support, promoting this transfer.
  • the intermediate support may consist of a conductive substrate on which a thin dielectric layer is deposited, but may also alternatively consist of a simple film of dielectric material.
  • a pressure roller ensures the intimate contact of the final plain paper on the previously inked image, for the transfer of the ink particles on the paper on which they will be subsequently fixed by application of pressure forces greater than those of image transfer.
  • the dielectric strip is subjected to cleaning and to erasing of the electrostatic charges after this image transfer operation for a new printing at the level of the first roller mentioned.
  • the object of the present invention is to define a specific organization of the different means used in an indirect electrostatic imorimante with flexible intermediate support, such as a strip of dielectric material, allowing the reproduction of printed images on a final support, such as plain paper in sheets, and having a simple and compact structure.
  • an indirect electrostatic printer with an intermediate image support in the form of a flexible strip of dielectric material comprising a latent image printing station, an image development station and an image transfer station on a final support through which said strip is successively driven and comprising, in addition to said image transfer station, an image fixing station through which said final support is driven, characterized in that said dielectric strip is mounted in a loop open defined between two supply and take-up rollers and an auxiliary trajectory folding roller of which at least one of them ensures the drive of the strip, and in that said auxiliary roller and an associated pressure roller simultaneously define said stations of image transfer and fixing on said final support in the form of individual sheets and constitute, with said strip, their means of entrain ite to a copy return station.
  • This indirect electrostatic printing printer comprises an intermediate image support 1, formed of a flexible strip of dielectric material, of great length, coming from a supply roller 2 and received by a take-up roller 3. Between these two rollers 2 and 3, the strip 1 is mounted in an open loop by means of an auxiliary roller 4 ensuring a folding of its trajectory along which it is driven from the supplying roller to the receiving roller.
  • This flexible strip 1 is constituted by a dielectric film of small thickness and width at least equal to that of the image to be printed and to be restored.
  • the strip 1 passes successively through an electrostatic printing station 5, disposed between the supply roll and the auxiliary roller, in a image development 6 arranged in the immediate vicinity of the auxiliary roller and in a common transfer and fixing station 7 supplied with individual sheets of ordinary paper 8 from an adjacent dispenser 9.
  • the printing station 5 is as such of conventional type and comprises a printing head 10 composed of a plurality of individual electrodes arranged in one or more lines or in matrix form facing the outside surface of the strip 1 in open loop, and an associated counter-electrode constituted by a conductive roller 11 in contact with the internal surface of the strip 1.
  • the latent electrostatic image is therefore printed on the external surface of the strip, as a function of control signals successively applied to the individual electrodes of the head by a suitable control circuit not shown.
  • the print head 10 further comprises spacing means between the electrodes and the external surface of the strip, in order to provide the necessary air film ion discharge performed for printing the latent image.
  • the development station 6 is as such known. It is here constituted by a magnetic brush 12 using a single-component or two-component powder taken from a reservoir 13, to ink the latent image previously generated. For reasons of compactness, this station is advantageously disposed in the immediate vicinity of the auxiliary roller 4 and is disposed substantially in the extension of the open loop of the strip 1.
  • the station for fixing and transferring the image of the strip 1 to the final plain paper support is constituted by the auxiliary roller 4 and a pressure roller 14 receiving an external pressure P coming to apply it against the strip 1 still supported by the roller 4.
  • the distributor 9 of individual sheets of paper with a guide outlet oriented tangentially to the rollers 4 and 14, feeds this image transfer and fixing station in synchronism with the generation of latent images in the printing station 5, as symbolized by the actuation control link C indicated between these two posts.
  • This dispenser 9 is also as such known and is therefore not described; only its connection C with the printing station, specific to this application, then makes it possible to suitably trigger the output of sheets 8, successively, which are directly caught between the rollers 4 and 14.
  • the rollers 4 and 14 may be metal rolls kept cold, between which only the dielectric strip 1 and the sheet of paper are strongly pressed.
  • the rollers 4 and 14 may be metal rolls kept cold, between which only the dielectric strip 1 and the sheet of paper are strongly pressed.
  • the type of image inking powder used in the development station 6, it is possible to create a potential difference between the rollers 4 and 14, as symbolized by the voltage V applied to the roller 14, in order to facilitate the image transfer.
  • the metal rollers 4 and 14 can be heated by means of lamps or filaments not shown. Under these conditions, the fixing of the image on the paper is improved and requires only a lower pressure. Simultaneously, the image transfer can also be improved by applying a potential difference between the rollers 14 and 4.
  • This restitution station 15 comprises a roller 16 for guiding the strip against which the internal face of the strip is applied, at least slightly breaking the end of the trajectory in open loop of the strip 1, upstream of the receiving roller, and a separating member 17, mounted opposite the roller 16, at the end of the broken path, receiving the successive sheets of paper and guiding them to a receptacle for restitution 18 from where they are available.
  • the belt 1 is driven by the auxiliary roller 4 and the axis of the receiving roller 3, the supply roller 2 being mounted with slight friction on its axis so that the strip 1 is properly tensioned when it passes through the printing station 5.
  • the auxiliary roller 4 and the pressure roller 14 mounted free in rotation on its axis receiving the pressure P constitute a means for gripping the individual sheets 8 delivered by the dispenser and, associated with the strip 1, their drive means up to the receptacle 18.
  • the rollers 4 and 14 will each be covered with a material making it possible to adapt the coefficients of friction between the rollers, the paper and the dielectric strip and also compensate by its flexibility for the machining defects of the rollers.
  • the long dielectric strip in a roll running along an open loop path to a take-up roll, makes it possible to define a printer structure of great simplicity and great compactness due essentially to the fact of the use a common station for transferring and fixing a latent image on sheets of paper driven simultaneously with the strip, produced by the sole mounting of the pressure roller 14 associated with the auxiliary roller 4 for folding the trajectory of the strip.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Paper Feeding For Electrophotography (AREA)
EP83103118A 1982-04-02 1983-03-29 Indirekter elektrostatischer Drucker Expired EP0091074B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8205726A FR2524390B1 (fr) 1982-04-02 1982-04-02 Imprimante electrostatique indirecte
FR8205726 1982-04-02

Publications (2)

Publication Number Publication Date
EP0091074A1 true EP0091074A1 (de) 1983-10-12
EP0091074B1 EP0091074B1 (de) 1986-09-24

Family

ID=9272686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103118A Expired EP0091074B1 (de) 1982-04-02 1983-03-29 Indirekter elektrostatischer Drucker

Country Status (7)

Country Link
US (1) US4514078A (de)
EP (1) EP0091074B1 (de)
JP (1) JPS58187380A (de)
CA (1) CA1191188A (de)
DE (1) DE3366381D1 (de)
FR (1) FR2524390B1 (de)
IE (1) IE54161B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589104A1 (fr) * 1985-10-28 1987-04-30 Telephonie Ind Commerciale Imprimante electrostatique indirecte recto-verso
FR2608098A1 (fr) * 1986-12-10 1988-06-17 Toshiba Kk Appareil d'impression et procede d'impression utilisant cet appareil
EP0240938A3 (en) * 1986-04-03 1989-11-23 Fuji Photo Film Co., Ltd. Image recording apparatus
EP0359571A3 (de) * 1988-09-16 1991-09-25 Lexmark International, Inc. Elektrophotographisches Druckgerät

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4600296A (en) * 1985-06-17 1986-07-15 Eastman Kodak Company Compact electrographic reproduction apparatus
FR2584560B1 (fr) * 1985-07-03 1990-05-11 Telephonie Ind Commerciale Dispositif effaceur de charges electrostatiques
US4684238A (en) * 1986-06-09 1987-08-04 Xerox Corporation Intermediate transfer apparatus
US4796048A (en) * 1987-11-23 1989-01-03 Xerox Corporation Resilient intermediate transfer member and apparatus for liquid ink development
US5194902A (en) * 1988-05-16 1993-03-16 Sharp Kabushiki Kaisha Transfer unit
US4954845A (en) * 1988-08-02 1990-09-04 Canon Kabushiki Kaisha Image fixing device and image forming apparatus with same
US5257046A (en) * 1992-08-31 1993-10-26 Xerox Corporation Direct electrostatic printing with latent image assist
AUPN846496A0 (en) * 1996-03-05 1996-03-28 Research Laboratories Of Australia Pty Ltd Electronic printing for display technology
CN102627043A (zh) * 2012-04-24 2012-08-08 陈成文 一种自动盖章机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132861B (de) * 1959-09-29 1962-07-05 Sandt A G Maschinenfabrik J Ablegevorrichtung fuer Stanzgut
US3194674A (en) * 1961-05-24 1965-07-13 Burroughs Corp Apparatus and method for duplicating messages which are electrostatically charged, developed and fixed on a master dielectric medium onto copy media capable of retainingelectrostatic charges
US3198648A (en) * 1961-11-30 1965-08-03 Burroughs Corp Electrostatic recording method
GB1064980A (en) * 1963-12-28 1967-04-12 Hitachi Ltd Method of and apparatus for electro-static successive recording of letters and printing of lines
US3739087A (en) * 1970-10-26 1973-06-12 Commw Of Australia Multi point distributor head for signal recording or the like
DE2917005A1 (de) * 1978-04-27 1979-11-08 Canon Kk Verfahren und vorrichtung fuer die elektrophotographie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761416A (en) * 1953-01-02 1956-09-04 Battelle Development Corp Development mechanism for electrostatic images
JPS5312618A (en) * 1976-07-22 1978-02-04 Fujitsu Ltd Recording device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132861B (de) * 1959-09-29 1962-07-05 Sandt A G Maschinenfabrik J Ablegevorrichtung fuer Stanzgut
US3194674A (en) * 1961-05-24 1965-07-13 Burroughs Corp Apparatus and method for duplicating messages which are electrostatically charged, developed and fixed on a master dielectric medium onto copy media capable of retainingelectrostatic charges
US3198648A (en) * 1961-11-30 1965-08-03 Burroughs Corp Electrostatic recording method
GB1064980A (en) * 1963-12-28 1967-04-12 Hitachi Ltd Method of and apparatus for electro-static successive recording of letters and printing of lines
US3739087A (en) * 1970-10-26 1973-06-12 Commw Of Australia Multi point distributor head for signal recording or the like
DE2917005A1 (de) * 1978-04-27 1979-11-08 Canon Kk Verfahren und vorrichtung fuer die elektrophotographie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
257 AUTOMATION, vol. 22, no. 6, juin 1975, page 6 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589104A1 (fr) * 1985-10-28 1987-04-30 Telephonie Ind Commerciale Imprimante electrostatique indirecte recto-verso
EP0222224A1 (de) * 1985-10-28 1987-05-20 Alcatel Business Systems Indirekte zweiseitige elektrostatische Druckmaschine
US4723137A (en) * 1985-10-28 1988-02-02 La Telephonie Industrielle Et Commerciale Telic Alcatel Recto-verso indirect electrostatic printer
EP0240938A3 (en) * 1986-04-03 1989-11-23 Fuji Photo Film Co., Ltd. Image recording apparatus
FR2608098A1 (fr) * 1986-12-10 1988-06-17 Toshiba Kk Appareil d'impression et procede d'impression utilisant cet appareil
EP0359571A3 (de) * 1988-09-16 1991-09-25 Lexmark International, Inc. Elektrophotographisches Druckgerät

Also Published As

Publication number Publication date
JPS58187380A (ja) 1983-11-01
IE830741L (en) 1983-10-02
JPH0257781B2 (de) 1990-12-05
EP0091074B1 (de) 1986-09-24
IE54161B1 (en) 1989-07-05
DE3366381D1 (en) 1986-10-30
CA1191188A (fr) 1985-07-30
US4514078A (en) 1985-04-30
FR2524390B1 (fr) 1986-10-17
FR2524390A1 (fr) 1983-10-07

Similar Documents

Publication Publication Date Title
EP0091074B1 (de) Indirekter elektrostatischer Drucker
CN100432843C (zh) 图像形成装置
JPS6252712B2 (de)
US5801729A (en) Image forming device with aperture electrode body
JPH0443795B2 (de)
EP0315509B1 (de) Verfahren zum Fixieren eines auf einem Blatt gelegenen Pulverentwicklers und Vorrichtung zum Fixieren dieses Entwicklers nach diesem Verfahren
JPH06336049A (ja) 画像形成装置
JPH0448635B2 (de)
EP0221452B1 (de) Elektrostatischer Bilddruckkopf
EP0218551A1 (de) Elektrothermischer Drucker
JP2004174914A (ja) 静電ミスト対策装置
JP3078360B2 (ja) 両面印刷装置およびそのための機構
JPH08137216A (ja) 画像形成装置
JPH0930031A (ja) 画像形成装置
JPH0863016A (ja) 定着装置
FR2524166A1 (fr) Procede d'impression electrostatique en couleurs a partir d'un signal video et dispositif pour la mise en oeuvre de ce procede
JPH1111727A (ja) 静電気ピンチベルト式用紙搬送装置
JPH075771A (ja) 転写材搬送装置
JPH0740583A (ja) 画像形成装置
JP2000168987A (ja) 搬送ベルト及び画像形成装置
JPH08118715A (ja) 画像形成装置
JPH08146725A (ja) 画像形成装置
JPS61120784A (ja) 熱転写方式プリンタ
JPS63149172A (ja) サ−マルプリンタ−
JPH08118716A (ja) 画像記録装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19840412

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALCATEL

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 3366381

Country of ref document: DE

Date of ref document: 19861030

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19870331

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: ALCATEL

Effective date: 19870331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19911230

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920218

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920226

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920331

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19931001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19931130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19931201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83103118.2

Effective date: 19880215