US3322253A - Vibration control apparatus for a matrix printer - Google Patents

Vibration control apparatus for a matrix printer Download PDF

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Publication number
US3322253A
US3322253A US497386A US49738665A US3322253A US 3322253 A US3322253 A US 3322253A US 497386 A US497386 A US 497386A US 49738665 A US49738665 A US 49738665A US 3322253 A US3322253 A US 3322253A
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US
United States
Prior art keywords
printing
print
line
harness
vibration
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
US497386A
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English (en)
Inventor
Robert C Burns
Hasegawa Tatsuo
Victor R Simpson
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Priority to US497386A priority Critical patent/US3322253A/en
Priority to US497164A priority patent/US3318429A/en
Priority to DE19661524421 priority patent/DE1524421A1/de
Priority to DE19661524422 priority patent/DE1524422B2/de
Priority to FR8067A priority patent/FR1497325A/fr
Priority to CH1497866A priority patent/CH444539A/de
Priority to NL666614552A priority patent/NL148727B/xx
Priority to GB46234/66A priority patent/GB1130072A/en
Priority to CH1497966A priority patent/CH446825A/de
Priority to GB46233/66A priority patent/GB1127120A/en
Priority to SE14133/66A priority patent/SE300897B/xx
Priority to BE688411D priority patent/BE688411A/xx
Priority to SE14134/66A priority patent/SE306630B/xx
Application granted granted Critical
Publication of US3322253A publication Critical patent/US3322253A/en
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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • B41J2/265—Guides for print wires

Definitions

  • Printing machines are known in which the outlines of characters are formed by printing the appropriate dots of a bi-dimensional dot matrix having the same general size as the characters to be printed.
  • One version of such a machine sometimes called a wire printer, employs a matrix of individually operable dot printing wire elements or the like which are projected in combination simultaneously toward a platen to effect printing of the whole character on an interposed print medium.
  • means are provided for effecting a relative longitudinal motion between the print matrix and the platen (and print medium) so that different charac ters are printed in series at successive positions along the print line.
  • the print head In serial machines, the print head, having the wire matrix formed therein, is moved along the print line while the print wires are actuated successively to record the characters composing the line of print.
  • the print head may be moved incrementally or continuously along the print line and then, upon completion of the line returned to the starting point for the next line, usually at the left side of the record member.
  • the incremental motion is characteristically interrupted so that one of the members moves in steps along the print line. It can be appreciated that if printing with incremental motion is to be performed at high rates of speed, the moving parts must be accelerated from rest, advanced, then brought to rest rapidly in short intervals of time. In addition, it is essential that the print head be returned to the starting point for a new line immediately upon completion of a line with a minimum of elapsed time.
  • the rate at which lines are printed also varies (for a given character rate) so that the amplitude of vibrations either increased or decreased depending upon the coincidence of the printing rate with the resonant frequency of the printing member. Because of the variation in vibration amplitude, the necessary incrementing force for the printing member applied at the print head would also change thus creating 3,322,253 Patented May 30, 1967 difficulty in keeping the increment time and distance carefully controlled.
  • Another object of this invention is to provide apparatus for limiting vibration in a serial matrix print member.
  • a further object of this invention is to provide a flexible restraining device for restricting objectionable vibrational and whiplash motion while yet permitting the necessary degree of movement for the printing member in a serial matrix printer.
  • a still further object of this invention is to provide a print member restraining device in a serial matrix printer which is flexible and resiliently supported, and which can be variably moved to different positions in accordance with the desired home position of the print member yet retaining its effectiveness.
  • the preceding and other objects are attained in accordance with the practice of the present invention by providing a flexible, elongate element adjacent the printing member when in the initial or home position.
  • the restraining element is supported at its two ends, one end being fixed adjacent the fixed end of the printing member and the other end being movably secured along the printing line so as to be variably settable at the left end of each printing line.
  • the restraining element is approximately the same length as the printing member so as to have a configuration similar thereto intermediate the two ends and conform approximately to the curvature of the printing member in the home position.
  • the restraining element has a vibration absorbing material thereon which serves to dampen vibrational movement set: up in the element by impact with the printing member.
  • auxiliary resilient means are included to be effective at only selected ones of the positions to which the restraint element can be set.
  • the auxiliary resilient means provide a change in the damping characteristics of the restraint element which is necessary because of the changing vibrational characteristics in the printing member at various home positions.
  • the restraint element is coated on its surface adjacent the printing member with a friction reducing material so that the printing member is not subjected to sticking and undue wear.
  • the restraint element by being coextensive with the printing member, is able to limit vibrational amplitude throughout the length of the printing member.
  • FIGURE 1 is a plan view of a serial matrix printer showing the printing member and arrangement of a restraining element therefor in accordance with the principles of the invention.
  • FIGURE 2 is a sectional view of the printing member and restraining element in conjunction with a vibration damping brush taken along the line 2-2 of FIG. 1.
  • the serial matrix printer apparatus comprises generally a stationary control mechanism 10 and a flexible print wire harness 11, including a matrix print head 12.
  • the print head is secured to a band 14 which can be moved incrementally or continuously along a horizontal supporting track 13 by any suitable mechanism such as electrostatic clutches 15, 16.
  • electrostatic clutches 15, 16 the print head is incremented from the left toward the right by energizing clutch 16 and, upon completion of a printing line, the print head is returned toward the left by energizing clutch 15.
  • the control mechanism is actuated by appropriate input signals to simultaneously project selected print wires through the harness 11 and from the print head 12 to produce the character desired.
  • the wire ends move an ink ribbon (not shown) against the platen-supported document to be printed thus leaving an impression of a character on the document.
  • the print head movement is limited by stops 20, 21 and limit switches 22, 23 which serve as auxiliary controls to terminate movement of the print head at each end of travel.
  • the stops and limit switches are adjustable to different line lengths as may be required by the form being printed.
  • restraining element 25 Adjacent the home position of the print harness at the left limit of travel, there is provided restraining element 25 which is secured to a bracket 26 on adjustable stop 20.
  • the restraining element is secured at its other end to fixed supports 27 and 36 on stationary control mechanism 10.
  • the flexible restraint element is preferably a thin, continuous strip formed of metal such as spring steel a few thousandths of an inch in thickness. The strip is approximately the same length as the print harness and is unsupported between its two ends so that it is thereby free to move horizontally.
  • the restraint element has secured thereto on the outside, away from the print harness, a vibration damping material 28 such as foam polyurethane or other nonmetallic material.
  • the element In order to minimize friction between the restraint element and the print harness, the element has bonded thereto on the inside, toward the harness, a friction reducing material 29 such as Teflon, a product of the E. I. du Pont de Nemours and Co., Inc.
  • a friction reducing material 29 such as Teflon, a product of the E. I. du Pont de Nemours and Co., Inc.
  • the layers of the laminated restraint member can be seen in FIG. 2.
  • print wire harness 11 is returned to the left home position rapidly and suddenly stopped at the desired position.
  • Limit stop is positioned so that the print wire harness contacts the restraint element substantially along the entire length of the harness.
  • the flexibility of the restraint element allows it to conform to the curvature of the harness and the foam backing on the element damps vibrations set up in the restraint element.
  • harness 11 including print head 12 can be accurately brought to the desired position by overtraveling a predetermined minimal distance and incrementing toward the right to the home position.
  • the restraint element is substantially the same length and height as the print wire harness so that at the extreme left emergency stop position both the harness and the elements are in substantially parallel adjacent planes. This position establishes the proper length of the restraint element.
  • the print head be capable of starting from any print position as a home position.
  • limit stop 20 is movable to the desired home position for the length of printing line required. Therefore, one end of the restraint element is also movable to the required position.
  • the frequency of return, or line rate is higher thus changing the frequency of vibration set up in print harness 11. This change in forcing frequency is compensated, however, by the provision of an auxiliary resilient member 30 which is secured to brackets 31 and 26 supported on limit stop 20.
  • resilient spring 30 contacts restraint element 25 only at one point 32.
  • the auxiliary member 30 contacts the restraint element at a second point 33.
  • the acute angle between the mounting surface of resilient spring 30 and restraint element 25, at the pont of contact 32 decreases as limit stop 20 is moved from left to right thus varying the amount and direction of applied spring force at this point in the desired manner.
  • the auxiliary member 3t thus provides decreasing stiffness at point 32, but adds a second support point for the higher line rate operation of the print harness in order to reduce the changing amplitude of vibrational undulations set up in the print harness and restraint element.
  • the sudden stopping and starting of the print head at the print line creates a second mode of vibration at the character rate.
  • This vibration is of varying amplitude dependent upon the frequency with which the incrementing occurs.
  • Vibration due to forward incrementing is damped by providing a light resistance element 34 constantly in contact with the print wire harness during operation.
  • the resistance element is a brushlike device made of plastic material, such as polyurethane, with bristles 35 in contact with the bottom edge of harness 11, and is shown most clearly in FIG. 2.
  • the plastic brush is also effective following the return sweep of the print harness for subduing minor vibrational amplitudes.
  • vibration control apparatus comprising:
  • vibration control apparatus comprising:
  • a printing member having one end fixed and the other end movable along a printing line between protracted and retracted positions and being unsupported between its ends;
  • Apparatus as described in claim 3 further comprising:
  • an elongate printing member having one end fixed and the other end movable from a protracted to a retracted position and :being unsupported between said ends;
  • Apparatus as described in claim 5 further including resilient support means at one end of said element effective for absorbing the shock developed by said impact.
  • Apparatus as described in claim 5 further comprising a plurality of flexible bristles adjacent said member and engageable thereby during and following said retraction for damping vibrations occurring in said member.
  • a printing machine the combination comprising: an elongate printing member having one end fixed and the other end movable along a printing line between a protracted position and variable retracted positions;
  • vibration absorbing material on said impact receiving means for damping vibrations developed therein by said impact.
  • Apparatus as described in claim 8 further comprising:
  • auxiliary support means operable when said impact receiving means is adjacent predetermined ones of said variable positions for providing a resilient sup- References Cited UNITED STATES PATENTS 2,129,065 9/1938 Loop 197-1 2,720,164 10/1955 Braun et al 1971 X 2,785,627 3/1957 Johnson 197-1 X 2,911,085 11/1959 Leathers 1971 3,236,351 2/1966 Fitch et al 197-1 ROBERT E. PULFREY, Primary Examiner. E. S. BURR, Assistant Examiner.

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Impact Printers (AREA)
US497386A 1965-10-18 1965-10-18 Vibration control apparatus for a matrix printer Expired - Lifetime US3322253A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US497386A US3322253A (en) 1965-10-18 1965-10-18 Vibration control apparatus for a matrix printer
US497164A US3318429A (en) 1965-10-18 1965-10-18 Wire harness structure for matrix printing apparatus
DE19661524421 DE1524421A1 (de) 1965-10-18 1966-10-08 Vorrichtung zur Daempfung von Schwingungsbewegungen
DE19661524422 DE1524422B2 (de) 1965-10-18 1966-10-08 Lagerkoerper fuer die verbindungs- bzw. druckdraehte eines drahtmatrixdruckers
FR8067A FR1497325A (fr) 1965-10-18 1966-10-11 Imprimante à fil
NL666614552A NL148727B (nl) 1965-10-18 1966-10-17 Draaddrukinrichting bevattende een langs een afdrukrol beweegbare drukkop.
CH1497866A CH444539A (de) 1965-10-18 1966-10-17 Lagerkörper für die Verbindungsdrähte zwischen Druckkopf und Steuereinheit in einem Drahtmatrixdrucker
GB46234/66A GB1130072A (en) 1965-10-18 1966-10-17 A flexible print wire tube harness
CH1497966A CH446825A (de) 1965-10-18 1966-10-17 Vorrichtung zur Dämpfung von Schwingungsbewegungen einer flexiblen, kabelartigen Führung
GB46233/66A GB1127120A (en) 1965-10-18 1966-10-17 Vibration reducing apparatus for curved resilient member
SE14133/66A SE300897B (enrdf_load_stackoverflow) 1965-10-18 1966-10-18
BE688411D BE688411A (enrdf_load_stackoverflow) 1965-10-18 1966-10-18
SE14134/66A SE306630B (enrdf_load_stackoverflow) 1965-10-18 1966-10-18

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US497386A US3322253A (en) 1965-10-18 1965-10-18 Vibration control apparatus for a matrix printer
US497164A US3318429A (en) 1965-10-18 1965-10-18 Wire harness structure for matrix printing apparatus

Publications (1)

Publication Number Publication Date
US3322253A true US3322253A (en) 1967-05-30

Family

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Application Number Title Priority Date Filing Date
US497386A Expired - Lifetime US3322253A (en) 1965-10-18 1965-10-18 Vibration control apparatus for a matrix printer
US497164A Expired - Lifetime US3318429A (en) 1965-10-18 1965-10-18 Wire harness structure for matrix printing apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
US497164A Expired - Lifetime US3318429A (en) 1965-10-18 1965-10-18 Wire harness structure for matrix printing apparatus

Country Status (8)

Country Link
US (2) US3322253A (enrdf_load_stackoverflow)
BE (1) BE688411A (enrdf_load_stackoverflow)
CH (2) CH444539A (enrdf_load_stackoverflow)
DE (2) DE1524421A1 (enrdf_load_stackoverflow)
FR (1) FR1497325A (enrdf_load_stackoverflow)
GB (2) GB1130072A (enrdf_load_stackoverflow)
NL (1) NL148727B (enrdf_load_stackoverflow)
SE (2) SE300897B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685629A (en) * 1970-09-21 1972-08-22 Scope Inc Print head carriage mechanism for impactless printer
US3782520A (en) * 1971-11-04 1974-01-01 Centronics Data Computer Resilient head assembly having resilient mount
US3867882A (en) * 1973-04-19 1975-02-25 Houston Eng Res Apparatus for printing labels directly onto packages, containers and the like
US4273457A (en) * 1976-11-16 1981-06-16 Canon Kabushiki Kaisha Recording device for use with recording media of various widths
FR2487260A1 (fr) * 1980-07-24 1982-01-29 Kienzle Apparate Gmbh Dispositif pour l'amenee du courant a une tete d'impression mobile

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592311A (en) * 1968-10-02 1971-07-13 Ibm Wire printing head
US3742846A (en) * 1972-03-31 1973-07-03 Ibm Wire printer with print head moved in figure eight pattern
DE2249125C2 (de) * 1972-10-06 1974-11-07 Camille Bauer Messinstrumente Ag, Wohlen (Schweiz) Drucker mit einer Auswählanordnung für Druckelemente
USRE32053E (en) * 1976-04-01 1985-12-24 Articulated ribbon-guiding structure
US4632583A (en) * 1984-10-01 1986-12-30 International Business Machines Corporation Flexible leader
JPH07186412A (ja) * 1993-12-24 1995-07-25 Brother Ind Ltd シャトルプリンタ
JP6640255B2 (ja) * 2018-02-20 2020-02-05 矢崎総業株式会社 湾曲規制部材及び給電装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129065A (en) * 1937-07-06 1938-09-06 Joseph N Loop Apparatus for printing characters
US2720164A (en) * 1952-01-26 1955-10-11 Remington Rand Inc Dot printing interpreter
US2785627A (en) * 1953-10-07 1957-03-19 Ibm Wire printer
US2911085A (en) * 1957-07-01 1959-11-03 Burroughs Corp Wire printer with oscillatory print head
US3236351A (en) * 1961-12-05 1966-02-22 Ibm High speed matrix printer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653534A (en) * 1948-06-26 1953-09-29 Burroughs Adding Machine Co Wire character forming printing machine
US2681614A (en) * 1949-09-27 1954-06-22 Burroughs Corp Recording machine with grouped recording elements operable selectively to form data-representations

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129065A (en) * 1937-07-06 1938-09-06 Joseph N Loop Apparatus for printing characters
US2720164A (en) * 1952-01-26 1955-10-11 Remington Rand Inc Dot printing interpreter
US2785627A (en) * 1953-10-07 1957-03-19 Ibm Wire printer
US2911085A (en) * 1957-07-01 1959-11-03 Burroughs Corp Wire printer with oscillatory print head
US3236351A (en) * 1961-12-05 1966-02-22 Ibm High speed matrix printer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685629A (en) * 1970-09-21 1972-08-22 Scope Inc Print head carriage mechanism for impactless printer
US3782520A (en) * 1971-11-04 1974-01-01 Centronics Data Computer Resilient head assembly having resilient mount
US3867882A (en) * 1973-04-19 1975-02-25 Houston Eng Res Apparatus for printing labels directly onto packages, containers and the like
US4273457A (en) * 1976-11-16 1981-06-16 Canon Kabushiki Kaisha Recording device for use with recording media of various widths
FR2487260A1 (fr) * 1980-07-24 1982-01-29 Kienzle Apparate Gmbh Dispositif pour l'amenee du courant a une tete d'impression mobile

Also Published As

Publication number Publication date
DE1524421A1 (de) 1970-08-20
NL148727B (nl) 1976-02-16
CH446825A (de) 1967-11-15
US3318429A (en) 1967-05-09
GB1127120A (en) 1968-09-11
BE688411A (enrdf_load_stackoverflow) 1967-03-31
NL6614552A (enrdf_load_stackoverflow) 1967-04-19
DE1524422A1 (de) 1970-08-13
CH444539A (de) 1967-09-30
SE306630B (enrdf_load_stackoverflow) 1968-12-02
FR1497325A (fr) 1967-10-06
DE1524422B2 (de) 1972-05-04
GB1130072A (en) 1968-10-09
SE300897B (enrdf_load_stackoverflow) 1968-05-13

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