EP0794063B1 - Tintenstrahldrucker - Google Patents

Tintenstrahldrucker Download PDF

Info

Publication number
EP0794063B1
EP0794063B1 EP19970102553 EP97102553A EP0794063B1 EP 0794063 B1 EP0794063 B1 EP 0794063B1 EP 19970102553 EP19970102553 EP 19970102553 EP 97102553 A EP97102553 A EP 97102553A EP 0794063 B1 EP0794063 B1 EP 0794063B1
Authority
EP
European Patent Office
Prior art keywords
roller
printhead
flat material
support member
printer according
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
EP19970102553
Other languages
English (en)
French (fr)
Other versions
EP0794063A1 (de
Inventor
Christophe Bizzini
Alain Tabasso
Georges Zoganas
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.)
Olivetti Tecnost SpA
Original Assignee
Olivetti Tecnost SpA
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 Olivetti Tecnost SpA filed Critical Olivetti Tecnost SpA
Publication of EP0794063A1 publication Critical patent/EP0794063A1/de
Application granted granted Critical
Publication of EP0794063B1 publication Critical patent/EP0794063B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
    • B41J25/3082—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms with print gap adjustment means on the print head carriage, e.g. for rotation around a guide bar or using a rotatable eccentric bearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0045—Guides for printing material
    • B41J11/005—Guides in the printing zone, e.g. guides for preventing contact of conveyed sheets with printhead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms

Definitions

  • This invention concerns an ink jet printer comprising a printing area in which a printhead is designed to print a flat material moved according to a feeding direction from a printer entrance through the printing area to an outlet and means for adjusting the distance separating the front surface of the printhead from the said flat material.
  • EP-A-0 519 495 and EP-A-0 334 548 disclose a printer according to the preamble of claim 1.
  • the European Patent Application EP-A-0 519 495 discloses a gap regulating member having an upper surface guiding an ink jet head and a lower surface guiding a recording medium at a defined distance from the head
  • the European Patent Application EP-A-0 334 548 discloses a skid-like spacer riding upon the printed surface in order to maintain a preselected spacing between the print head and the printed surface.
  • the support member(s) for the material to be printed is (are) arranged near the printhead and cooperate with the surface to be printed to form a reference level which does not change, regardless of thickness of the material to be printed, whether thin sheet, cardboard sheet, envelope, etc. Considering that it is not necessary to provide means for measuring thickness, nor mechanisms for adjusting height, construction of the printer is greatly simplified, cost price is reduced, operation is reliable and operating life longer.
  • the support member consists of at least a first rotating member (i.e. a continuous roller, a cylinder or a segmented roller) mounted on a shaft rotating around a fixed axis, or of a fixed crosspiece.
  • a first rotating member i.e. a continuous roller, a cylinder or a segmented roller
  • the support member cooperates with a second rotating member (i.e. again a continuous roller, a cylinder or a segmented roller), resiliently pressing against the support member, or with at least a first resilient pressure pad.
  • a second rotating member i.e. again a continuous roller, a cylinder or a segmented roller
  • resiliently pressing against the support member or with at least a first resilient pressure pad.
  • the printer comprises at least a third rotating member (i.e. again a continuous roller, a cylinder or a segmented roller), arranged downstream of the printhead and rotating around a second fixes axis, intended for cooperating with the surface of the flat material facing the printhead to define with the support member the said reference level, and cooperating with a fourth rotating member (i.e. again a continuous roller, a cylinder or a segmented roller), resiliently pressing against it, or with at least a second resilient pressure pad.
  • a third rotating member i.e. again a continuous roller, a cylinder or a segmented roller
  • the first and the third rotating members are driven to rotate and the tangential speed on the circumference of the third rotating member is from 0.1 to 1.0% greater than that of the first rotating member.
  • the material to be printed is thus perfectly taut and aligned, and its surface to be printed is at one with the reference level defined before, thereby ensuring printing of great quality and precision.
  • the printer can advantageously comprise a second support member consisting of a fixed crosspiece arranged between the first rotating member and the printhead and whose surface facing the flat material is aligned with the circumference of the first rotating member so as to define the said reference level.
  • the sole figure is a side view in partial section of this embodiment.
  • the ink jet printer comprises a frame 14, a printing area 10 situated between an entrance 11 for the flat materials 18 to be printed and an outlet 12.
  • a carriage 16 with a printhead 15 is slidingly fitted on a shaft 17 and rests with a projection 25 on a fixed crosspiece 26. It may be moved according to a direction perpendicular to a direction of feeding 19 of the flat materials 18.
  • the latter may be sheets of paper ranging from a light to a heavy weight, cardboard paper, envelopes, etc., so their thickness may vary to a considerable extent.
  • the ink jet printer further comprises a first support member 22 cooperating with a surface of the flat material 18 facing the printhead 15.
  • This first support member 22 comprises a roller 23 (which can be a continuous cylinder or a segmented roller), the shaft 24 of which is rotatable around a fixed axis.
  • Back-up counter-rollers 27 are mounted on pivoting levers 28 and resiliently pressed by springs 29 against the first support member 22 which is arranged in the upstream vicinity of the printhead 15.
  • a first fixed support member 32 is arranged between the roller 23 and the printhead 15 and comprises a fixed crosspiece 35 in the form of a profiled part, the lower surface of which is aligned with the circumference of the roller 23.
  • the pivoting levers 28 are provided at their top part with a blade of a plastic material 36, for example MylarTM, 0.12 mm thick.
  • the blade 36 is attached to the lever 28 and presses resiliently with a distal part against a surface of the flat material 18 opposite to the surface to be printed, so as to press the flat material 18 against the fixed crosspiece 35.
  • the fixed crosspiece 35 and the blade 36 thus ensure in combination precise alignment during introduction of the flat material 18, and also that the material 18 is held in position at page bottom, when the material 18 is no longer held by the roller 23 and the counter-rollers 27.
  • the printer comprises downstream of the printhead 15 a mechanism 40 intended for tautening the material 18 to be printed in the printing area 10.
  • the mechanism 40 comprises a roller 41, arranged on a shaft 42 rotatable around a fixed axis.
  • the roller 41 is fitted with fine points 43 intended for cooperating with the flat material 18.
  • Counter-rollers 46 are resiliently pressed by springs 47 against the roller 41.
  • the latter and the roller 23 are made rotate by a motor not shown.
  • the tangential displacement speed of the roller 41 is slightly greater than that of the roller 23 so that the material 18 is tautened in the printing area. A tangential speed difference of between 0.1 and 1.0% is particularly advantageous.
  • the flat material 18 is introduced through the entrance 11 where it slides on a surface 50 of the frame 14, and where it is guided by a guiding element 51 before being gripped between the roller 23 and the counter-rollers 27.
  • the upper surface of the flat material 18 to be printed thereafter always adopts the same position and height with respect to the printhead 15, regardless of the thickness of the material 18, in order to define a reference level creating a predetermined gap h with the front surface 20 of the printhead 15.
  • the position of the counter-rollers 27 consequently varies in function of thickness of the flat material 18.
  • the flat material 18 is then pressed by the plastic blade 36 against the fixed crosspiece 35, perfectly aligned with the circumference of the roller 23.
  • the flat material 18 is thus guided by the first support member 22 and the first fixed support member 32 until it comes between the roller 41 and the counter-rollers 46, in order to be tautened in the printing area 10.
  • the gap of distance h between the surface of the flat material 18 to be printed and the front surface 20 of the printhead 15 is also constant for all the materials to be printed, however thick they may be. This perfectly adjusted gap is obtained by the support members 22, 32 and the roller 41 and through the effect of the tension exerted on the flat material 18 in the printing area 10.
  • the rotating members 23, 27, 41 and 46 could consist of continuous rollers or cylinders or discontinuous rollers arranged on a common shaft.
  • the roller 23 could be replaced by a fixed support in the form of a crosspiece.
  • the rollers 23 and 41 need not necessarily be driven; the printer in this case would comprise additional driving members.
  • rollers 27 and 46 could be replaced by resilient support pads.
  • the printhead 15 and fixed support members could be arranged under the material 18 to be printed, in which case printing would take place upwards.
  • the reference level could be inclined, or even vertical.

Landscapes

  • Ink Jet (AREA)
  • Common Mechanisms (AREA)
  • Handling Of Cut Paper (AREA)

Claims (10)

  1. Tintenstrahldrucker, aufweisend:
    einen Druckbereich (10), in dem ein Druckkopf (15) zum Bedrucken eines flachen Materials (18) angeordnet ist, das entsprechend einer Vorschubrichtung (19) von einem Eingang (11) des Druckers durch den Druckbereich (10) zu einem Ausgang (12) bewegt wird;
    Einstell-Mittel zum Einstellen eines Zwischenraums (h), der eine Stirnfläche (20) des Druckkopfes von dem flachen Material (18) trennt, wobei die Einstell-Mittel ein Auflageteil (22, 32) aufweisen, das mit einer dem Druckkopf (15) zugewandten Fläche des flachen Materials (18) zusammenarbeitet, um eine Bezugshöhe zu definieren, die den vorgegebenen Zwischenraum (h) mit der Stirnfläche (20) des Druckkopfes (15) bildet; und
    einen Mechanismus (40) zum Spannen des flachen Materials (18) im Druckbereich (10), um es in einer Ebene anzuordnen, die sich in der Bezugshöhe erstreckt,
    dadurch gekennzeichnet, dass
    das Auflageteil eine erste Rolle (23), die sich um eine erste feststehende Achse drehen kann, aufweist, und dadurch, dass der Mechanismus zum Spannen eine zweite Rolle (41), die sich um eine zweite feststehende Achse drehen kann, aufweist, wobei die erste Rolle, die zweite Rolle und der Druckkopf an der selben Seite des flachen Materials angeordnet sind, und wobei sich die erste Achse und die zweite Achse in einer festen Position in Bezug auf den Druckkopf (15) befinden und der Zwischenraum (h) für alle zu bedruckende Materialien konstant bleibt.
  2. Drucker nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die erste Rolle (23) auf einer Welle (24) sitzt, die sich um die erste Achse drehen kann.
  3. Drucker nach Anspruch 1,
    dadurch gekennzeichnet, dass
    das Auflageteil (32) ein starres Querstück (35) aufweist.
  4. Drucker nach Anspruch 3,
    dadurch gekennzeichnet, dass
    er eine elastische Klinge (36) aufweist, das gegenüber dem starren Querstück (35) angeordnet ist, um das flache Material (18) gegen das starre Querstück (35) zu drücken.
  5. Drucker nach Anspruch 2,
    dadurch gekennzeichnet, dass
    das Auflageteil (22) mit einem ersten Drehteil (27), das federnd gegen das Auflageteil (22) gedrückt wird, zusammenarbeitet.
  6. Drucker nach Anspruch 2,
    dadurch gekennzeichnet, dass
    das Auflageteil (22) mit einem federnden Halteglied zusammenarbeitet.
  7. Drucker nach einen der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass
    die zweite Rolle (41) stromabwärts des Druckkopfes (15) angeordnet ist, an einer um eine feststehenden Achse drehbar gelagerten Welle (42) befestigt ist, für das Zusammenarbeiten mit der Oberfläche des flachen Materials (18), das dem Druckkopf (15) zugewandt ist, angeordnet ist, um mit dem ersten Auflageteil (22) die Bezugshöhe zu definieren, und mit einem zweiten Drehteil (46), das federnd an sie gedrückt wird, zusammenarbeitet.
  8. Drucker nach einen der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass
    die zweite Rolle (41) stromabwärts des Druckkopfes (15) angeordnet ist, an einer um eine feststehenden Achse drehbar gelagerten Welle (42) befestigt ist, für das Zusammenarbeiten mit der Oberfläche des flachen Materials (18), das dem Druckkopf (15) zugewandt ist, angeordnet ist, um mit dem ersten Auftagetell (22) die Bezugshöhe zu definieren, und mit einem federnden Halteglied zusammenarbeitet.
  9. Drucker nach Anspruch 7 oder 8,
    dadurch gekennzeichnet, dass
    die zweite Rolle (41) von einem Antriebsmechanismus angetrieben wird und an seinem Umfang dünne Spitzen (43) hat, die mit dem flachen Material (18) zusammenarbeiten, um einen Mechanismus (40) zu bilden, der zum Spannen des flachen Materials (18) im Druckbereich dient.
  10. Drucker nach Anspruch 7 oder 8,
    dadurch gekennzeichnet, dass
    die erste Rolle (23) und die zweite Rolle (41) gedreht werden, und dass die Tangentialgeschwindigkeit am Umfang der zweiten Rolle (41) zwischen 0.1 und 1.0% größer ist als die Tangentialgeschwindigkeit am Umfang der ersten Rolle (23).
EP19970102553 1996-03-05 1997-02-18 Tintenstrahldrucker Expired - Lifetime EP0794063B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH568/96 1996-03-05
CH00568/96A CH691961A5 (fr) 1996-03-05 1996-03-05 Imprimante.
CH56896 1996-03-05

Publications (2)

Publication Number Publication Date
EP0794063A1 EP0794063A1 (de) 1997-09-10
EP0794063B1 true EP0794063B1 (de) 2001-10-10

Family

ID=4190025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970102553 Expired - Lifetime EP0794063B1 (de) 1996-03-05 1997-02-18 Tintenstrahldrucker

Country Status (4)

Country Link
EP (1) EP0794063B1 (de)
JP (1) JPH09323408A (de)
CH (1) CH691961A5 (de)
DE (1) DE69707173T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4892389B2 (ja) * 2007-04-03 2012-03-07 株式会社ミマキエンジニアリング プリンター装置
CN102616006B (zh) * 2012-03-13 2014-02-26 新会江裕信息产业有限公司 一种平推式打印机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859878A (ja) * 1981-10-06 1983-04-09 Usac Electronics Ind Co Ltd 印字ヘツドの支持装置
EP0334548B1 (de) * 1988-03-21 1993-12-22 Hewlett-Packard Company Vorrichtung zum Sichern des Flachliegens eines Blattes und der Druckspalteinstellung
JP3584044B2 (ja) * 1991-06-18 2004-11-04 セイコーエプソン株式会社 インクジェットプリンタ
DE69415129T2 (de) * 1993-10-29 1999-04-29 Hewlett Packard Co Selbstanpassende Steuerung des Abstandes zwischen Druckkopf und Aufzeichnungsträger in Tintenstrahldruckern
GB2290262B (en) * 1994-02-10 1996-09-04 Seiko Epson Corp Ink jet printer

Also Published As

Publication number Publication date
CH691961A5 (fr) 2001-12-14
JPH09323408A (ja) 1997-12-16
EP0794063A1 (de) 1997-09-10
DE69707173T2 (de) 2002-06-27
DE69707173D1 (de) 2001-11-15

Similar Documents

Publication Publication Date Title
KR960012776B1 (ko) 잉크-제트 프린트헤드 대 종이의 기준 시스템
US7677683B2 (en) Recording apparatus
EP0627322B1 (de) Druckermechanismus zur Druckspalteüberwachung
EP0595321B1 (de) Apparat zum Fördern von Blättern
KR19980032691U (ko) 잉크젯 프린터의 용지두께에 따른 헤드갭 조정장치
EP0166132B1 (de) Drucker mit einem Zuführungssystem für mehrfache Wirkungsweise
US6089773A (en) Print media feed system for an ink jet printer
CN1076670C (zh) 打印机
GB2320466A (en) Ink-jet printer with dual incline sheet support for controlling printhead to sheet spacing
JP3497388B2 (ja) プリンタ
EP0794063B1 (de) Tintenstrahldrucker
EP0519495B1 (de) Tintenstrahldrucker
US7568852B2 (en) Printer with reciprocating printhead carriage
JPH0725085A (ja) 湿潤性インクプリンタの印刷材料可動支持機構
US5992846A (en) Sheet feeder and printer
US20010010775A1 (en) Platen and printing apparatus
US5329302A (en) Tapered platen roller for thermal printer
JP2542947Y2 (ja) 印字装置
EP0334548B1 (de) Vorrichtung zum Sichern des Flachliegens eines Blattes und der Druckspalteinstellung
JP4424509B2 (ja) 記録装置の紙送り装置及び該装置を備える記録装置
JP2002053241A (ja) フラップ押さえ部材及び該部材を備える記録装置
JP3815541B2 (ja) 記録装置の紙送り装置及び該装置を備える記録装置
JPH08310068A (ja) プリンタ
JP4092679B2 (ja) ドットプリンタの用紙搬送方法
JPH047185A (ja) インクジェットプリンタにおける記録ヘッドの位置調整機構

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

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19980310

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

Owner name: OLIVETTI LEXIKON S.P.A.

17Q First examination report despatched

Effective date: 19990712

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

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

Owner name: OLIVETTI TECNOST S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 69707173

Country of ref document: DE

Date of ref document: 20011115

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

ET Fr: translation filed
ET1 Fr: translation filed ** revision of the translation of the patent or the claims
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
REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

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

Ref country code: DE

Payment date: 20150226

Year of fee payment: 19

Ref country code: IT

Payment date: 20150225

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69707173

Country of ref document: DE

Representative=s name: WEICKMANN & WEICKMANN PATENTANWAELTE - RECHTSA, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 69707173

Country of ref document: DE

Representative=s name: PATENTANWAELTE WEICKMANN & WEICKMANN, DE

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

Ref country code: FR

Payment date: 20150217

Year of fee payment: 19

Ref country code: GB

Payment date: 20150226

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69707173

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160218

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20161028

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

Ref country code: IT

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

Effective date: 20160218

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

Ref country code: GB

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

Effective date: 20160218

Ref country code: DE

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

Effective date: 20160901

Ref country code: FR

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

Effective date: 20160229