EP0498973A2 - Imprimante, en particulier imprimante matricielle - Google Patents

Imprimante, en particulier imprimante matricielle Download PDF

Info

Publication number
EP0498973A2
EP0498973A2 EP91250331A EP91250331A EP0498973A2 EP 0498973 A2 EP0498973 A2 EP 0498973A2 EP 91250331 A EP91250331 A EP 91250331A EP 91250331 A EP91250331 A EP 91250331A EP 0498973 A2 EP0498973 A2 EP 0498973A2
Authority
EP
European Patent Office
Prior art keywords
printer
print head
lever
rocker
carriage
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.)
Withdrawn
Application number
EP91250331A
Other languages
German (de)
English (en)
Other versions
EP0498973A3 (en
Inventor
Dieter Dipl. -Ing. Stellmach
Martin Dipl. -Ing. Storz
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0498973A2 publication Critical patent/EP0498973A2/fr
Publication of EP0498973A3 publication Critical patent/EP0498973A3/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a printer, in particular a matrix printer, with a print head that can be moved along a guide along the print line, with a device for adjusting the distance between the print head and a print abutment for unevenly thick, single or multiple record carriers lying on the print abutment, one on the print head rotatable sensing roller rests on the record carrier and / or on the platen.
  • Such printers with distance setting devices for the print head serve partly the purpose of processing different types or thicknesses of receipts, such as passbooks and the like, but partly also the purpose of setting the correct distance for the printing elements, the travel of which is limited.
  • the stroke length of printing needles is only about 0.3 to 0.5 mm. However, it is also necessary to process thicker recording media, such as books.
  • Printers with distance adjustment devices based on a sprung sensing roller are well known.
  • One of the known solutions (DE-Cl-36 41 044) provides a separate rocker for the sensing roller and a largely parallel rocker for the print head. Both wings are moved against each other under spring pressure.
  • Another known solution transfers the movement of the - also sprung - sensing roller to a sensor and an indicator, via a signal amplifier, an analog-digital converter on a microprocessor, via which a stepper motor is digitally controlled, whereby the stepper motor drives a gear segment which is connected to the eccentric on which the print head carriage is slidably mounted.
  • both known solutions only have the spring-loaded sensing roller in common and the prerequisite for a recording medium of the same thickness over the writing path. The starting edge for determining the width can include cannot be measured.
  • the invention has for its object to provide a versatile automatic distance setting device that is functional for relatively thin and for relatively thick recording media (books).
  • a rigidly rotatably mounted sensing roller with a slide guide which can be moved back and forth to the pressure abutment and a sensor which measures the slide movement analogously is provided on the print head or on the print head slide
  • Sensing roller a sensor lever is arranged, on one, on the pressure abutment or on the record carrier lever end a measuring skid is provided and on the other lever end a sensor for an analog measurement signal is arranged so that when the printhead or the printhead carriage moves along the print line, analog measured values can be generated and supplied to control electronics in which the measured values can be stored and evaluated and that the signals converted into digital signals can be supplied to an actuator which acts against the force a spring by means of a stepper motor with a downstream intermediate gear keeps the print head carriage or the print head at a desired distance from the print abutment.
  • the advantage is a mechanically uncontrolled system - the rigid sensing roller - in addition to a servo-operated automatic system, so that one of the two systems can always be used, while a single sprung sensing roller can only work depending on the predetermined spring force.
  • the system according to the invention therefore works either with the rigid sensing roller or with the fully automatic system and is therefore able to handle record carriers of the smallest thickness and of considerably greater thickness.
  • the sensing roller and the sensor lever are rotatably mounted on a common axis and that the respective circumferential points lying there have a minimum distance which can be determined by the lever lengths of the two-armed sensor lever designed as a rocker.
  • the use of the rigid sensing roller or the use of the fully automatic system depending on the direction of movement of the print head carriage, from left to right or from right to left, i.e. from a predetermined starting position of the print head, the use of the rigid sensing roller or the use of the fully automatic system.
  • the axis for the sensor roller and the sensor lever is attached to the housing of the pressure needle guide assembly. This means that there is only a single axis of rotation for both the sensing roller and the sensor lever required.
  • the print head and the connected print head carriage are mounted so as to be movable in the line direction on the slide guide profile which can be moved back and forth to the pressure abutment, the rocker arm being coupled as a drive to a lever arm. Due to the rocker arm, it is possible to achieve the desired transmission ratios and thus the response to faster or slower adjustment on the adjustment path.
  • the drive for the rocker arm consists of the actuator and this consists of a stepper motor, the motor pinion of which drives an intermediate gear, an eccentric disc being arranged at the output of the intermediate gear, against which the lever end of the rocker rests under the force of a tension spring.
  • the printhead is now turned on or moved away solely on the basis of the control signals.
  • An embodiment of the invention provides that the rocker is rotatably mounted in pairs on a rigid axis, that the tension springs are arranged in pairs and that the actuator or the intermediate gear are provided with axially identical motor stumps or output shafts. This results in an absolutely parallel adjustment of the print head relative to the print abutment.
  • a further embodiment of the invention consists in that the rocker is mounted in the printer side wall or in the slide guide profile by means of a pivot pin and that an elongated hole is provided in the printer side wall for the pivot pins is.
  • the guide profile can be displaced parallel to the printer side walls.
  • the senor consists of elements which are arranged either between the printer side wall and the movable carriage guide profile or between the rocker and the fixed printer side wall or between the back of the carriage guide profile and a part of the printer which is fixed to the frame.
  • the location for the sensor can advantageously be provided here where the greatest possible movement or translation of the movement takes place.
  • the measuring skid on the side facing away from the sensing roller has a run-up slope for recording media of considerably different thicknesses. This ramp is advantageous for relatively thick books.
  • a printer has a print head 1, which is supported by means of a sensing roller 2 on a print abutment 3 or on a recording medium 3a lying on the print abutment 3 without air bubbles.
  • the pressure abutment 3 is rectangular in cross section; square or cylindrical.
  • the printing needles 1b emerging from the printing needle guide assembly 1a of the print head 1 perform a fixed stroke within which an ink ribbon 3b has to be struck down to the recording medium 3a in order to generate dots which form a character.
  • the print head 1 is attached to a print head carriage 4 which is movable perpendicular to the plane of the drawing in FIG. 1.
  • the print head carriage 4 in turn carries pairs of guide rollers 4a and 4b which are supported on a carriage guide profile 5.
  • This slide guide profile 5 is made of an extruded aluminum profile with bead-shaped borders. Both ends of the slide guide profile have a pair of pivots 5a and 5b. The upper and the lower pair of pivots 5a / 5b engage in elongated holes 6, which are located in the printer side walls 3c shown in FIG. 2. The lower pair of pressure pins 5b engages in rockers 7 which are rotatably mounted next to the printer side walls 3c. The rocker 7 is axially fixed with an axial ring 7a. Due to this mobility in the elongated holes 6 of the fixed printer side walls 3c, the carriage guide profile 5 is movable together with the print head 1 in the plane of the drawing in FIG. 2, specifically by one Printhead distance to the recording medium 3a determining total amount.
  • the rocker 7 consists of two angle levers, each with the lever arms 7b and 7c.
  • the two angle levers are rigidly connected to one another by an axis 7d.
  • An actuator 8, which has an intermediate gear 9, is assigned to the lever arm 7c.
  • This intermediate gear 9 initially consists of the motor pinion 9a of a stepper motor 10 which engages in a larger gear 9b.
  • An eccentric disc 11 is mounted on the gear 9b, against which the lever arm 7c is held constantly in contact under the force of a tension spring 12 (FIG. 1).
  • the force of the tension springs 12 simultaneously determines the pressure force of the print head 1 against the pressure abutment 3, provided that this force is not canceled out by a counterforce.
  • the printhead 1 is initially held by the sensing roller 2 at a distance from the platen 3 or recording medium 3a, which corresponds to a printhead distance 13 between the lowest circumferential point 14 and the printing elements 1c as a printing distance (FIG. 3).
  • a feeler lever 15 for scanning the thickness of the recording medium 3a is also rotatably mounted on the printing needle guide assembly 1a.
  • the sensor lever 15 is rotatably mounted on the same axis 16 on the pressure needle guide assembly 1a, and the sensing roller 2 is rotatably mounted on one lever end 17 of the sensor lever 15.
  • a measuring skid 18 is formed and a sensor 20 is connected to the other lever end 19 (FIG. 3).
  • the sensor 20 generates an analog measurement signal, so that when the print head 1 or the print head carriage 4 moves along a print line, analog measurement values occur on the recording medium 3a and can be supplied to control electronics 21.
  • the measured values can be stored and evaluated in the control electronics 21 and are converted into digital signals.
  • the signals are given to the actuator 8, the stepper motor 10 moves against the force of the spring 12 via the downstream intermediate gear 9, the print head carriage 4 or the print head 1 independently of the sensing roller 2 to a new distance. This new distance is then always larger than the distance difference 13 of the printing elements 1c.
  • the measuring skid 18 could of course also have a roller 22 of suitable diameter to reduce friction (FIG. 3).
  • the measuring skid 18 is arranged at a minimum distance 23 from the sensing roller 2 or from the pressure elements 1c.
  • a tension spring 12 is also attached to the lever end 19 and pulls the sensor lever 15 with the lever end 17 against the recording medium 3a or against the pressure abutment 3.
  • the sensor 20 is formed from elements 25 and 26 which move past one another and which are parts of an optical, a field plate or an inductive transmitter.
  • the elements 25 and 26 for the sensor 20 can also be arranged as elements 25a and 26a between the printer side wall 3c and the slide guide profile 5 or as elements 25b and 26b between the rocker 7 and the printer side edge 3c. It is also possible to assign the elements 25c and 26c to the rear side 28 of the slide guide profile 5 and a part of the printer which is fixed to the frame.
  • the encoder signal is amplified and converted in the control electronics 21.
  • the digitized signal is then processed by the microprocessor.
  • the microprocessor then controls a driver circuit of the actuator 8.
  • the above-described printer with the printhead gap adjuster operates as follows:
  • the print head 1 is as shown (Fig. 2) outside the path of the recording medium 3a.
  • Now the recording medium 3a to be printed is drawn into the printer and adjusted to the first print line.
  • the print head 1 then moves to the right (FIGS. 2 and 3).
  • the sensor lever 15 reaches the edge 27 and triggers a jump function.
  • the recording medium thickness 3d or 3e is measured.
  • the position of the recording medium 3a is calculated via the position of the print head carriage 4 and a thickness-dependent correction factor (FIG. 4).
  • the actuator 8 now adjusts the printhead spacing 13 before the printing elements 1c have reached the recording medium 3a.
  • the measuring point of the sensor lever 15 leads the printing point of the print head 1 by a minimum distance 23, so that the actuator 8 has sufficient time for adjustment.
  • the print head either moves beyond the edge 27, or the actuator 8 lifts the print head 1 by an amount which is necessary in order to be able to perform the line connection of the recording medium 3a in a functionally reliable manner.
  • the actuator 8 remains in the basic position during printing. In the line connection for printing a book (such as a passbook), the actuator 8 lifts the print head 1 from the book, or the print head 1 is moved to the side of the book.
  • the actuator 8 sets a small value compared to the value measured by the sensor 20 smaller printing distance 13 a. As a result, the sensing roller 2 only raises the bridging head 1 by this small difference. The book pages are still pressed together.

Landscapes

  • Common Mechanisms (AREA)
EP19910250331 1990-12-21 1991-12-12 Printer, in particular matrix printer Withdrawn EP0498973A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041985 1990-12-21
DE4041985A DE4041985A1 (de) 1990-12-21 1990-12-21 Drucker, insbesondere matrixdrucker

Publications (2)

Publication Number Publication Date
EP0498973A2 true EP0498973A2 (fr) 1992-08-19
EP0498973A3 EP0498973A3 (en) 1992-10-14

Family

ID=6421557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910250331 Withdrawn EP0498973A3 (en) 1990-12-21 1991-12-12 Printer, in particular matrix printer

Country Status (4)

Country Link
US (1) US5172987A (fr)
EP (1) EP0498973A3 (fr)
JP (1) JPH04296582A (fr)
DE (1) DE4041985A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930005467B1 (ko) * 1990-12-07 1993-06-22 주식회사 금성사 칼라 비디오 프린터의 노광부 필름간격 유지장치
US5265966A (en) * 1993-03-05 1993-11-30 Rimage Corporation Printer linkage
US5366301A (en) * 1993-12-14 1994-11-22 Hewlett-Packard Company Record media gap adjustment system for use in printers
US5672015A (en) * 1994-04-11 1997-09-30 International Business Machines Corporation Apparatus and method for printing
DE19581389T1 (de) * 1994-10-06 1996-12-05 Pfu Ltd Verfahren und Vorrichtung zur Papierzuführung für einen Drucker
US6771378B2 (en) 1994-10-20 2004-08-03 Canon Kabushiki Kaisha Information processing apparatus which obtains information concerning residual ink amount from an attached ink jet printer
DE19609659C1 (de) * 1996-03-12 1997-04-17 Siemens Nixdorf Inf Syst Belegtransport- und Anschlageinrichtung
JPH1016350A (ja) * 1996-03-14 1998-01-20 Canon Inc プリント装置
DE19742147C2 (de) * 1997-09-24 1999-07-22 Siemens Nixdorf Inf Syst Verfahren zum Einstellen und Einhalten des Abstandes zwischen einer Druckoberfläche und einem Druckkopf und Druckvorrichtung zur Durchführung des Verfahrens
GB2333266B (en) * 1998-01-14 2002-03-13 Tally Computerdrucker Gmbh Printer with Print Head Distance-setting Device
US6578276B2 (en) * 1998-01-27 2003-06-17 Eastman Kodak Company Apparatus and method for marking multiple colors on a contoured surface having a complex topography
US7213989B2 (en) * 2000-05-23 2007-05-08 Silverbrook Research Pty Ltd Ink distribution structure for a printhead
US6786658B2 (en) * 2000-05-23 2004-09-07 Silverbrook Research Pty. Ltd. Printer for accommodating varying page thicknesses
US6488422B1 (en) * 2000-05-23 2002-12-03 Silverbrook Research Pty Ltd Paper thickness sensor in a printer
WO2001089837A1 (fr) * 2000-05-23 2001-11-29 Silverbrook Research Pty. Ltd. Capteur d'epaisseur de papier dans une imprimante
US7004652B2 (en) * 2000-05-23 2006-02-28 Silverbrook Research Pty Ltd Printer for accommodating varying page thickness
US6526658B1 (en) 2000-05-23 2003-03-04 Silverbrook Research Pty Ltd Method of manufacture of an ink jet printhead having a moving nozzle with an externally arranged actuator
US6988840B2 (en) * 2000-05-23 2006-01-24 Silverbrook Research Pty Ltd Printhead chassis assembly
US6755518B2 (en) * 2001-08-30 2004-06-29 L&P Property Management Company Method and apparatus for ink jet printing on rigid panels
US20100263557A1 (en) * 2009-04-21 2010-10-21 HD Stencil Printer, LL Tattoo stencil printing system and use of the same
US9139024B2 (en) 2013-01-31 2015-09-22 Hewlett-Packard Development Company, L.P. Sensor positioning system
GB2559404A (en) 2017-02-06 2018-08-08 Dover Europe Sarl A printing apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420269A (en) * 1981-03-27 1983-12-13 Triumph-Adler A.G. Fur Buro- Und Informationstechnik Device for lifting the printing head off the platen
DE3417381A1 (de) * 1984-05-10 1985-11-14 CAB-Produkttechnik Gesellschaft für Computer- und Automations-Bausteine mbH, 7500 Karlsruhe Vorrichtung zur automatischen papierdickenanpassung eines druckerkopfes
JPS63254079A (ja) * 1987-04-13 1988-10-20 Fujitsu Ltd 印刷装置
DE3830880A1 (de) * 1988-09-08 1990-03-15 Mannesmann Ag Drucker, insbesondere matrixnadeldrucker, mit einer druckkopfabstandseinstelleinrichtung

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE389061B (sv) * 1975-03-06 1976-10-25 Philips Svenska Ab Tryckhuvud med distansorgan for instellning av tryckavstand
DE2608301C2 (de) * 1976-02-28 1986-02-20 Ncr Corp., Dayton, Ohio Vorrichtung zur Regelung des Abstandes eines Druckkopfes von einem Aufzeichnungsträger
US4024940A (en) * 1976-04-13 1977-05-24 Mannesmann Aktiengesellschaft Matrix printer having document thickness compensating device
DE2642540C3 (de) * 1976-09-22 1984-03-22 NCR Corp., 45479 Dayton, Ohio Druckvorrichtung
DE2752061C3 (de) * 1977-11-22 1981-02-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Einrichtung zur Einstellung des Abstandes eines Druckkopfes senkrecht zum Druckwiderlager
JPS5739978A (en) * 1980-08-25 1982-03-05 Toshiba Corp Printer
JPS5796868A (en) * 1980-12-08 1982-06-16 Fujitsu Ltd Dot printer
JPS58205785A (ja) * 1982-05-26 1983-11-30 Tokyo Electric Co Ltd プリンタの印字ヘツドギヤツプ調節装置
US4676675A (en) * 1984-05-09 1987-06-30 Brother Kogyo Kabushiki Kaisha Media thickness compensating device for a printer
JPS6232067A (ja) * 1985-08-02 1987-02-12 Tokyo Electric Co Ltd プラテンギヤツプ調整装置
JPS6274676A (ja) * 1985-09-30 1987-04-06 Tokyo Electric Co Ltd 印字装置
JPS62119077A (ja) * 1985-11-19 1987-05-30 Ricoh Co Ltd 印字装置の印字ヘツドギヤツプ調整機構
DE3641044C1 (de) * 1986-12-01 1988-05-11 Nixdorf Computer Ag Vorrichtung zur Halterung eines Matrixdruckkopfes
CN1013840B (zh) * 1988-01-28 1991-09-11 精工爱普生株式会社 打印机的压纸卷筒间隙的自动调整机构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420269A (en) * 1981-03-27 1983-12-13 Triumph-Adler A.G. Fur Buro- Und Informationstechnik Device for lifting the printing head off the platen
DE3417381A1 (de) * 1984-05-10 1985-11-14 CAB-Produkttechnik Gesellschaft für Computer- und Automations-Bausteine mbH, 7500 Karlsruhe Vorrichtung zur automatischen papierdickenanpassung eines druckerkopfes
JPS63254079A (ja) * 1987-04-13 1988-10-20 Fujitsu Ltd 印刷装置
DE3830880A1 (de) * 1988-09-08 1990-03-15 Mannesmann Ag Drucker, insbesondere matrixnadeldrucker, mit einer druckkopfabstandseinstelleinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 48 (M-793)(3396) 3. Februar 1989 & JP-A-63 254 079 ( MIKIO MAEDA ) 20. Oktober 1988 *

Also Published As

Publication number Publication date
DE4041985A1 (de) 1992-07-02
EP0498973A3 (en) 1992-10-14
US5172987A (en) 1992-12-22
JPH04296582A (ja) 1992-10-20
DE4041985C2 (fr) 1993-09-23

Similar Documents

Publication Publication Date Title
DE4041985C2 (fr)
EP0360728B1 (fr) Dispositif pour régler l'espacement entre la tête d'impression et le cylindre d'une imprimante, notamment d'une imprimante à aiguilles
DE2535136C2 (de) Halteeinrichtung in einer Druckvorrichtung zum Halten eines Einzelblattes oder eines einen Buchrücken aufweisenden Aufzeichnungsmediums
DE2239117C3 (de) Verstellvorrichtung zum Verändern des Abstandes zwischen Druckkopf und Druckwiderlager
DE2365899B2 (de) Mosaik-Druckkopf-Anordnung
DE3521093A1 (de) Mechanismus zum einstellen des abstands zwischen druckkopf und walze eines druckers
EP0542811B1 (fr) Dispositif d'impression a tete d'impression reglable
DE1806714A1 (de) Druckwerk zum fliegenden Abdrucken von Zeichen
DE2723806C3 (de) Schrittschaltmechanismus, insbesondere Zeilenschaltmechanismus für Drucker und ähnliche Büromaschinen
DE2752061B2 (de) Einrichtung zur Einstellung des Abstandes eines Druckkopfes senkrecht zum Druckwiderlager
DE2430407A1 (de) Mosaik-drahtdruckkopf
DE3511387A1 (de) Druckwerk mit einem in druckzeilenrichtung verfahrbaren druckkopf und einem als druckgegenlager dienenden druckbalken
DE2354137C2 (de) Vorrichtung zur Steuerung der Bewegung eines Druckkopfes für anschlagloses Drucken
DE3329927C2 (fr)
DE4023411A1 (de) Vorrichtung zur einstellung des abstandes eines druckkopfes eines matrixdruckers von der oberflaeche des aufzeichnungstraegers
DE2159201C3 (de) Vorrichtung zur Führung und Bewegung eines Lesekopfes
DE4201636C2 (de) Vorrichtung zur Befestigung eines Aufzeichnungsblattes an der Druckwalze eines Farbdruckers
DE2554804C2 (de) Belegdrucker
DE3315733A1 (de) Vielfarben-schreibgeraet
AT406429B (de) Vorrichtung zur herstellung von taktil erfassbaren erhabenheiten
EP0269976B1 (fr) Dispositif de support pour tête d'impression à matrice
DE3036337C2 (de) Schreib- oder ähnliche Maschine mit einer Hub- und Transportvorrichtung für das Farbband
DE1561237C (de) Druckvorrichtung
DE3339134C2 (de) Elektrischer Schreiber
EP0369162A2 (fr) Imprimante comportant un poste d'impression basculant

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: A2

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19921112

R17P Request for examination filed (corrected)

Effective date: 19921111

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940701