EP0431714B1 - Drucker mit einem Druckwiderlager, insbesondere Matrixnadeldrucker - Google Patents

Drucker mit einem Druckwiderlager, insbesondere Matrixnadeldrucker Download PDF

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Publication number
EP0431714B1
EP0431714B1 EP90250292A EP90250292A EP0431714B1 EP 0431714 B1 EP0431714 B1 EP 0431714B1 EP 90250292 A EP90250292 A EP 90250292A EP 90250292 A EP90250292 A EP 90250292A EP 0431714 B1 EP0431714 B1 EP 0431714B1
Authority
EP
European Patent Office
Prior art keywords
printer
layer
caps
platen
intermediate layer
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
EP90250292A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0431714A3 (en
EP0431714A2 (de
Inventor
Günter Dipl.-Ing. Gomoll
Wolfgang Dipl.-Ing. Hauslaib
Ulrich Dipl.-Ing. Buschmann
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 EP0431714A2 publication Critical patent/EP0431714A2/de
Publication of EP0431714A3 publication Critical patent/EP0431714A3/de
Application granted granted Critical
Publication of EP0431714B1 publication Critical patent/EP0431714B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B41J11/02—Platens
    • B41J11/08—Bar or like line-size platens

Definitions

  • the invention relates to a printer with a pressure abutment, in particular a matrix dot-matrix printer, which consists of a layer structure in the vertical cross section, with a metallic pressure bar following one after the other in the direction of action of the pressure element, a vibration-reducing damping layer and a metallic intermediate layer, as well as with an insulating layer that decouples frequencies.
  • a pressure abutment in particular a matrix dot-matrix printer, which consists of a layer structure in the vertical cross section, with a metallic pressure bar following one after the other in the direction of action of the pressure element, a vibration-reducing damping layer and a metallic intermediate layer, as well as with an insulating layer that decouples frequencies.
  • Such abutments are used in so-called workplace printers, which have to work very quietly so as not to disturb the worker.
  • the pressure elements acting on the pressure abutment generate structure-borne noise, which are transmitted through the pressure abutment in the printer frame and thus also into the housing, from where they are then emitted as airborne sound.
  • the known solution accordingly has a vibration damping, consisting of a pressure beam, a damping layer as a plastic adhesive layer, an intermediate layer made of metal, followed by an insulating layer made of plastics from the polymer group, and finally a metal pressure beam underlay, all of which are in a special pressure beam support are stored, but only the pressure beam support is in contact with the pressure beam support.
  • This arrangement has proven itself in terms of vibration, and the noise resulted in a noise level in the range of approx. 50 dB (A).
  • the invention is based on the call that the insulation assembly decoupling the frequencies with at least the same result of the noise level of approximately 50 dB (A) be made more cost-effective.
  • the insulating layer decoupling the frequencies is formed by elastic caps arranged at the ends of a unit consisting of pressure beam, damping layer and intermediate layer, which are provided with thickenings in the corner areas with respect to the wall areas and in recesses the printer side walls can be inserted.
  • the caps advantageously cause the structure-borne noise to be decoupled from the printer side walls, these being made of plastic that can be plasticized, which can be glass-fiber reinforced, so that as little structure-borne noise as possible can be emitted by components located behind the caps, i.e. the resonance frequency of this spring-mass oscillator is also decisive here under the printing frequency of the printing elements.
  • the thickening results in a more rigid construction, ie a rigid mounting of the designated unit in the side walls without affecting the frequency decoupling (insulation).
  • the invention represents a significant simplification compared to the older solution and is also more economical to manufacture and more advantageous in terms of the space required in the construction of a printer. It also saves weight.
  • the caps are molded from rubber.
  • the caps mounted on the pressure beam, damping layer and intermediate layer can be snapped into the recesses in the printer side walls and snapped out again. This considerably simplifies the assembly of the platen, and it is possible to replace the platen as a whole with a new or modified one or to perform the desired service work in the interior of the printer without having to dismantle it.
  • the matrix printer is drawn without the upper half of the housing (Fig. 1> to allow an insight into the inside.
  • the essential components are a pressure abutment 1 with a carriage 2 that can be moved back and forth in parallel with a matrix print head 3 and a belt drive 4.
  • the carriage 2 is mounted or guided on a guide axis 5 and an axis 6.
  • a push tractor device 7 In the rear part of the matrix printer there is a push tractor device 7 with push tractors 7a and 7b.
  • the pressure abutment 1 (FIG. 2) consists in a cross-section 11 (FIG. 3) perpendicular to the longitudinal extent of a layer structure with a metallic pressure bar 13 in succession in the direction of the pressure element 12, a vibration-reducing damping layer 14 and a metallic intermediate layer 15.
  • the functional "intermediate layer” 15 "is now followed by an insulating layer 16 that decouples the frequencies, which results as follows:
  • the insulation layer 16 is located at ends 17a and 17b of a unit 17, consisting of the pressure beam 13, the damping layer 14 and the metallic intermediate layer 15, and consists of elastic caps 18 which can be inserted into recesses 19 of the printer side walls 20.
  • the caps 18 made of elastic material are provided in corners 18a with thickenings 18b opposite wall areas 18c.
  • the caps 18 are made of rubber or similar elastic plastic materials.
  • the caps 18 comprising the pressure bar 13, the damping layer 14 and the intermediate layer 15 are held in place by the dimensions of the recess frames 21 formed on the printer side walls 20.
  • the unit 17 is introduced in the axial direction in FIG. 1 first in the left end 17a and then from the front in the right end 17b, (Fig. 4) the cap 18 is locked and unlocked again.
  • the lock consists of an arm 22, the arm 22 with projections (Fig. 4) on the left and right engages under corresponding projections of the printer side wall 20.

Landscapes

  • Handling Of Sheets (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Vibration Prevention Devices (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
EP90250292A 1989-12-06 1990-11-28 Drucker mit einem Druckwiderlager, insbesondere Matrixnadeldrucker Expired - Lifetime EP0431714B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940776 1989-12-06
DE3940776A DE3940776C1 (it) 1989-12-06 1989-12-06

Publications (3)

Publication Number Publication Date
EP0431714A2 EP0431714A2 (de) 1991-06-12
EP0431714A3 EP0431714A3 (en) 1991-10-09
EP0431714B1 true EP0431714B1 (de) 1995-03-29

Family

ID=6395163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250292A Expired - Lifetime EP0431714B1 (de) 1989-12-06 1990-11-28 Drucker mit einem Druckwiderlager, insbesondere Matrixnadeldrucker

Country Status (4)

Country Link
US (1) US5106218A (it)
EP (1) EP0431714B1 (it)
AT (1) ATE120407T1 (it)
DE (2) DE3940776C1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4755747B2 (ja) * 2000-05-17 2011-08-24 東芝テック株式会社 画像形成装置
JP4756730B2 (ja) * 2000-09-07 2011-08-24 東芝テック株式会社 印台支持装置
CN103481676B (zh) * 2013-09-29 2016-05-18 江门市得实计算机外部设备有限公司 一种针式打印机的打印辊结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1091281B (it) * 1977-10-19 1985-07-06 Olivetti & Co Spa Organo di contrasto per una stampante ad impatto
DE2928233C2 (de) * 1979-07-12 1984-06-28 Siemens Ag, 1000 Berlin Und 8000 Muenchen Vorrichtung zur Dämpfung des von einem Druckbalken eines Druckers ausgehenden Geräusches
DE2941172C2 (de) * 1979-10-11 1982-09-09 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Lagerteil, z.B. für die Achse einer Schreibwalze in Büromaschinen
IT1126317B (it) * 1979-11-06 1986-05-21 Honeywell Inf Systems Struttura antirumore di una stampante ad impatto
DE2947111A1 (de) * 1979-11-22 1981-05-27 Siemens AG, 1000 Berlin und 8000 München Laermgedaempfte baueinheit eines geraetes
US4364682A (en) * 1981-10-15 1982-12-21 Scm Corporation Acoustic member mounting means for use in typewriters
JPS60192670A (ja) * 1984-03-14 1985-10-01 Toshiba Corp プリンタ
JPS61248762A (ja) * 1985-04-26 1986-11-06 Canon Inc プリンタ
DE3538762A1 (de) * 1985-10-31 1987-05-14 Mannesmann Ag Drucker, insbes. matrixdrucker der nadelbauart

Also Published As

Publication number Publication date
EP0431714A3 (en) 1991-10-09
US5106218A (en) 1992-04-21
EP0431714A2 (de) 1991-06-12
DE59008801D1 (de) 1995-05-04
ATE120407T1 (de) 1995-04-15
DE3940776C1 (it) 1991-09-12

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