EP0152117A3 - Actuator for dot matrix printhead - Google Patents

Actuator for dot matrix printhead Download PDF

Info

Publication number
EP0152117A3
EP0152117A3 EP85101689A EP85101689A EP0152117A3 EP 0152117 A3 EP0152117 A3 EP 0152117A3 EP 85101689 A EP85101689 A EP 85101689A EP 85101689 A EP85101689 A EP 85101689A EP 0152117 A3 EP0152117 A3 EP 0152117A3
Authority
EP
European Patent Office
Prior art keywords
actuator
dot matrix
efficiency
elements
maximize
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Withdrawn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
EP85101689A
Other languages
German (de)
French (fr)
Other versions
EP0152117A2 (en
Inventor
Daniel Alan West
Lawrence Shau-Ming Nyi
Ramon Jose Ravelo
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.)
Ricoh Printing Systems America Inc
Original Assignee
Ricoh Printing Systems America Inc
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 Ricoh Printing Systems America Inc filed Critical Ricoh Printing Systems America Inc
Publication of EP0152117A2 publication Critical patent/EP0152117A2/en
Publication of EP0152117A3 publication Critical patent/EP0152117A3/en
Withdrawn legal-status Critical Current

Links

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
    • B41J2/27—Actuators for print wires
    • B41J2/275—Actuators for print wires of clapper type

Landscapes

  • Impact Printers (AREA)
  • Electromagnets (AREA)

Abstract

An improved dot matrix actuator is provided which includes a magnetic circuit formed of a yoke assembly and a pivotal armature. The armature is pivotally supported with respect to the yoke by means of a flexure assembly which eliminates the need for a true pivot between the two elements. The elements are shaped so as to maintain a constant small air gap therebetween so as to maximize the magnetic efficiency of the device while eliminating wear. The device is operated just below saturation of the magnetic circuit in order to maximize efficiency. In addition, the actuator includes several features for maximizing its speed and operational efficiency.
EP85101689A 1984-02-16 1985-02-15 Actuator for dot matrix printhead Withdrawn EP0152117A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58065684A 1984-02-16 1984-02-16
US580656 1984-02-16

Publications (2)

Publication Number Publication Date
EP0152117A2 EP0152117A2 (en) 1985-08-21
EP0152117A3 true EP0152117A3 (en) 1987-05-27

Family

ID=24321980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101689A Withdrawn EP0152117A3 (en) 1984-02-16 1985-02-15 Actuator for dot matrix printhead

Country Status (2)

Country Link
EP (1) EP0152117A3 (en)
JP (1) JPS60247570A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE87545T1 (en) * 1988-04-22 1993-04-15 Mannesmann Ag PROCESS FOR MANUFACTURING ARMATURES OF THE ELECTROMAGNETIC COIL ARMATURE SYSTEM FOR MATRIX PRINT HEADS AND ARMATURES, ESPECIALLY. THE FOLDING ANCHOR DESIGN.
JPH0239947A (en) * 1988-07-29 1990-02-08 Seikosha Co Ltd Printing head
DE58907361D1 (en) * 1989-12-18 1994-05-05 Mannesmann Ag Matrix print head, especially serial matrix needle print head.
JP6213229B2 (en) 2013-12-26 2017-10-18 株式会社明電舎 Insulation structure of power converter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991869A (en) * 1975-12-15 1976-11-16 General Electric Company Print head improvement
US4136978A (en) * 1975-10-10 1979-01-30 Optical Business Machines, Inc. High speed electromagnetic printing head
DE2935994A1 (en) * 1979-09-06 1981-04-02 Ibm Deutschland Gmbh, 7000 Stuttgart Print hammer with electromagnetic actuator - has hammer mounted on spring arm coupled to magnetic actuator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206266A (en) * 1977-12-27 1980-06-03 Florida Data Corporation Printer arm blank
JPS54130225A (en) * 1978-03-29 1979-10-09 Hitachi Ltd Printer
JPS5832237Y2 (en) * 1979-09-28 1983-07-16 古河電気工業株式会社 Current collector for trolley wire
JPS5676444U (en) * 1979-11-20 1981-06-22
JPS5691035U (en) * 1979-12-18 1981-07-20
JPS6123406Y2 (en) * 1980-02-29 1986-07-14
JPS5720351U (en) * 1980-07-10 1982-02-02
JPS5720368A (en) * 1980-07-11 1982-02-02 Brother Ind Ltd Printing head for dot printer
JPS5787969A (en) * 1980-11-25 1982-06-01 Brother Ind Ltd Supporting device for armature
JPS57173174A (en) * 1981-04-17 1982-10-25 Hitachi Ltd Printer arm
JPS5798366A (en) * 1981-09-28 1982-06-18 Ricoh Co Ltd Dot printer
JPS5833479A (en) * 1982-07-23 1983-02-26 Ricoh Co Ltd Printing head of dot printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136978A (en) * 1975-10-10 1979-01-30 Optical Business Machines, Inc. High speed electromagnetic printing head
US3991869A (en) * 1975-12-15 1976-11-16 General Electric Company Print head improvement
DE2935994A1 (en) * 1979-09-06 1981-04-02 Ibm Deutschland Gmbh, 7000 Stuttgart Print hammer with electromagnetic actuator - has hammer mounted on spring arm coupled to magnetic actuator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 17, no. 1, June 1974, pages 340,341; Armonk, New York, US R.W. LUOMA: "Electromagnetic actuator unit." * The whole article * *

Also Published As

Publication number Publication date
JPH0455115B2 (en) 1992-09-02
JPS60247570A (en) 1985-12-07
EP0152117A2 (en) 1985-08-21

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Effective date: 19870303

RIN1 Information on inventor provided before grant (corrected)

Inventor name: NYI, LAWRENCE SHAU-MING

Inventor name: WEST, DANIEL ALAN

Inventor name: RAVELO, RAMON JOSE