EP0030271A2 - Structure d'amortissement du bruit - Google Patents

Structure d'amortissement du bruit Download PDF

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Publication number
EP0030271A2
EP0030271A2 EP80106663A EP80106663A EP0030271A2 EP 0030271 A2 EP0030271 A2 EP 0030271A2 EP 80106663 A EP80106663 A EP 80106663A EP 80106663 A EP80106663 A EP 80106663A EP 0030271 A2 EP0030271 A2 EP 0030271A2
Authority
EP
European Patent Office
Prior art keywords
platen
frame
guiding bars
printing
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.)
Granted
Application number
EP80106663A
Other languages
German (de)
English (en)
Other versions
EP0030271A3 (en
EP0030271B1 (fr
Inventor
Cosimo Cassiano
Celestino Bosani
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.)
Bull HN Information Systems Italia SpA
Original Assignee
Honeywell Information Systems Italia 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 Honeywell Information Systems Italia SpA filed Critical Honeywell Information Systems Italia SpA
Publication of EP0030271A2 publication Critical patent/EP0030271A2/fr
Publication of EP0030271A3 publication Critical patent/EP0030271A3/en
Application granted granted Critical
Publication of EP0030271B1 publication Critical patent/EP0030271B1/fr
Expired 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/04—Sound-deadening or shock-absorbing devices or measures therein
    • B41J19/06—Resilient mounting of mechanism
    • 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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/10—Sound-deadening devices embodied in machines

Definitions

  • the present invention relates to the impact serial printers used in data processing systems, and more particularly to the mechanical structure of such printers with reference to the noise produced during the printing.
  • an impact serial printer generally includes a rigid fra me equiped with parallel guides, arranged in the direction of the prin ting line, and a platen on which a printing support is leaned. Guides and platen are strictly fixed to the frame and are part of the same.
  • a printing carriage equiped with a printing head (of needle type for mosaic printing or of bearing-type element kind) slides on the guides. It has been experimentally noted that the main noise source is given by the impact on the platen caused by the printing head, and by the head and carriage vibrations during the carriage sliding on the guides. However the produced vibrations induce vibrations all over the frame through the mechanical restraints, which frame acts therefore as sound source.
  • a noise reduction is therefore obtained by decoupling, as to the vibration diffusion, the mechanical elements, which contitute the main noise source, the one from the other and from the secondary element that is the frame.
  • the mechanical structure of a printer includes a metallic frame formed by a bot tom 5 and at least two sides 2, 3.
  • Both bottom 5 and sides 2, 3 are made with suitable thickness metal plate in order to give to the equipment an high stoutness.
  • Figure 2 shows, for better clearness, the particular of such grooves on side 2, indicated with reference numerals 24, 25.
  • Bars 6 and 7 have a bearing and_guiding function for a carriage which supports the printing head.
  • Carriage and printing head are shown in figure 1 where they are respec tively indicated by reference numerals 21, 22.
  • Bars 6 and 7 are preferably cylindrical and are provided with two end cylindrical tapers.
  • front bar 6 is therefore engaged in the two grooves of side plate 3 and of side plate 2 respectively, through bushes 9, 10 and rear bar 7 is engaged in the other two grooves of si de plate 3 and of side plate 2 respectively, through bushes 12 and 11. Both couples of bushes 10, 11 and 8, 9 are then clamped to side plates 2 and 3 respectively through clamping plates 13, 12.
  • bars 6 and 7 are restrained to the frame through interposition of the rubber bushes and the mutual position of the bars to as sure a proper sliding of the carriage is determined within acceptable tolerances.
  • Clamping plates 12, 13 in turn are restrained to side plates 3, 2 by a pair of screws.
  • Platen 16 is formed by a prismatic elongated rigid element provided with two fixing holes 19, 20 at the ends and, instead of being fixed to the frame it is fixed to bars 6 and 7 by means of two arms 14, 15.
  • Each arm has two holes 28, 29 designed to receive the tapered ends of bars 6 and 7 and a third hole 5 designed to receive a screw or fixing element of the platen and corresponding to one of the two holes 19, 20 present in platen 16 ends.
  • arms 14 and 15 are engaged on the tapered ends of bar 6 and 7 and are interposed between the untapered end portions of the bars and the shoulder of the rubber bush pairs 8, 9 and 10, 11. Platen 16 is restrained to the two arms 14 and 15 ends through clamping screews 23, 24.
  • the two arms 14 and 15 are made with plastic material; their function is to bear platen 16 allowing to maintain the parallelism between pla ten and bars 6 and 7 within acceptable tolerances also during printing. It is to be noted that the parallelism between the axis of bars 6 and 7 within acceptable toleranoes is determined by the side plates 2 and 3.
  • the parallelism between bars 6 and 7 is essential for a proper advancement of the printing head carriage; the parallelism between platen 16 and bar 7 is essential for uniform printing.
  • platen 16 ends are not restrained to side pla tes 2 and 3 of the metallic frame (solution adopted in the prior art) but platen 16 together with bars 6 and 7, thanks to arms 14 and 15 form a unitary member connected to the metallic frame only through bushes 8, 9, 10, 11.

Landscapes

  • Handling Of Sheets (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP80106663A 1979-11-06 1980-10-30 Structure d'amortissement du bruit Expired EP0030271B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2705079 1979-11-06
IT27050/79A IT1126317B (it) 1979-11-06 1979-11-06 Struttura antirumore di una stampante ad impatto

Publications (3)

Publication Number Publication Date
EP0030271A2 true EP0030271A2 (fr) 1981-06-17
EP0030271A3 EP0030271A3 (en) 1981-08-12
EP0030271B1 EP0030271B1 (fr) 1983-09-14

Family

ID=11220847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106663A Expired EP0030271B1 (fr) 1979-11-06 1980-10-30 Structure d'amortissement du bruit

Country Status (4)

Country Link
EP (1) EP0030271B1 (fr)
JP (1) JPS5684984A (fr)
DE (1) DE3064842D1 (fr)
IT (1) IT1126317B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466753A (en) * 1982-09-24 1984-08-21 Willcox Frederick P Carriage guiding system and frame for a printer
US4556334A (en) * 1984-06-29 1985-12-03 Electronique Serge Dassault Unitary guide for platen and print head
GB2221654A (en) * 1988-07-12 1990-02-14 Citizen Watch Co Ltd Accommodating vibration-producing components (e.g. in selective printers)
EP0431714A3 (en) * 1989-12-06 1991-10-09 Mannesmann Aktiengesellschaft Printer with a platen, in particular matrix needle printer
EP1674281A1 (fr) * 2004-12-22 2006-06-28 Océ-Technologies B.V. Imprimante à chariot à mouvement de va-et-vient et à structure de cadre en deux-pièces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58138024U (ja) * 1982-03-15 1983-09-17 株式会社堀場製作所 記録計

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827147A (en) * 1954-12-30 1958-03-18 Underwood Corp Typewriter and the like, with elongated platen carriage
DE2437454B2 (de) * 1974-08-03 1976-12-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Druckwiderlager fuer druckwerke

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466753A (en) * 1982-09-24 1984-08-21 Willcox Frederick P Carriage guiding system and frame for a printer
US4556334A (en) * 1984-06-29 1985-12-03 Electronique Serge Dassault Unitary guide for platen and print head
GB2221654A (en) * 1988-07-12 1990-02-14 Citizen Watch Co Ltd Accommodating vibration-producing components (e.g. in selective printers)
GB2221654B (en) * 1988-07-12 1992-10-28 Citizen Watch Co Ltd Printing apparatus including means for absorbing vibration and for locking vibrating portion against movement
EP0431714A3 (en) * 1989-12-06 1991-10-09 Mannesmann Aktiengesellschaft Printer with a platen, in particular matrix needle printer
EP1674281A1 (fr) * 2004-12-22 2006-06-28 Océ-Technologies B.V. Imprimante à chariot à mouvement de va-et-vient et à structure de cadre en deux-pièces
US7438488B2 (en) 2004-12-22 2008-10-21 Oce-Technologies B.V. Printer with reciprocating carriage and a two-stage frame structure

Also Published As

Publication number Publication date
IT7927050A0 (it) 1979-11-06
IT1126317B (it) 1986-05-21
EP0030271A3 (en) 1981-08-12
JPS6345954B2 (fr) 1988-09-13
EP0030271B1 (fr) 1983-09-14
JPS5684984A (en) 1981-07-10
DE3064842D1 (en) 1983-10-20

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