EP0188669A3 - Matrix printing head - Google Patents

Matrix printing head Download PDF

Info

Publication number
EP0188669A3
EP0188669A3 EP85113392A EP85113392A EP0188669A3 EP 0188669 A3 EP0188669 A3 EP 0188669A3 EP 85113392 A EP85113392 A EP 85113392A EP 85113392 A EP85113392 A EP 85113392A EP 0188669 A3 EP0188669 A3 EP 0188669A3
Authority
EP
European Patent Office
Prior art keywords
armature
plate
permanent magnet
cores
electromagnetic
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
EP85113392A
Other languages
German (de)
Other versions
EP0188669B1 (en
EP0188669A2 (en
Inventor
Bernd Dipl.-Ing. Gugel (Fh)
Harald Dipl.-Ing. Niebel (Fh)
Hubert Ott
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
Priority to AT85113392T priority Critical patent/ATE55729T1/en
Publication of EP0188669A2 publication Critical patent/EP0188669A2/en
Publication of EP0188669A3 publication Critical patent/EP0188669A3/en
Application granted granted Critical
Publication of EP0188669B1 publication Critical patent/EP0188669B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J2/28—Actuators for print wires of spring charge type, i.e. with mechanical power under electro-magnetic control

Abstract

A matrix print head includes a magnetic yoke plate, magnetic pole defining cores annularly arranged on the yoke plate, electromagnetic coils mounted on the cores, a permanent magnet plate arranged in magnetic conductive relationship to the yoke plate; the yoke plate, the cores, coils, and permanent magnet plate establishing an electromagnetic assembly, there being additionally an armature assembly including an armature plate and a plurality of deflectable radially extending armature arms, the armature assembly being arranged in relation to the electromagnetic assembly such that the armature arms cooperate with the electromagnetic cores, there being print elements such as styli connected to the armature arms; the improvement disclosed is comprised of the following features, the armature plate and the armature arms are physically separated from each other but resiliently interconnected to establish a single uncritical parasitic air gap; and the magnetic yoke and armature plates are radially, inwardly recessed vis-a-vis the permanent magnet plate. A radially inwardly and outwardly recessed intermediate plate is interposed between the permanent magnet and the armature ring.
EP85113392A 1985-01-25 1985-10-22 Matrix printing head Expired - Lifetime EP0188669B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85113392T ATE55729T1 (en) 1985-01-25 1985-10-22 MATRIX PRINT HEAD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853502469 DE3502469A1 (en) 1985-01-25 1985-01-25 MATRIX PRINT HEAD
DE3502469 1985-01-25

Publications (3)

Publication Number Publication Date
EP0188669A2 EP0188669A2 (en) 1986-07-30
EP0188669A3 true EP0188669A3 (en) 1988-06-01
EP0188669B1 EP0188669B1 (en) 1990-08-22

Family

ID=6260757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113392A Expired - Lifetime EP0188669B1 (en) 1985-01-25 1985-10-22 Matrix printing head

Country Status (5)

Country Link
US (1) US4695174A (en)
EP (1) EP0188669B1 (en)
JP (1) JPS61172745A (en)
AT (1) ATE55729T1 (en)
DE (2) DE3502469A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1331313C (en) * 1988-07-08 1994-08-09 Akio Yano Printing head of wire-dot impact printer
US5102245A (en) * 1989-08-26 1992-04-07 Citizen Watch Co., Ltd. Print head
JP4905093B2 (en) * 2006-12-01 2012-03-28 ブラザー工業株式会社 Machine tool spindle equipment
US20100104398A1 (en) * 2008-09-23 2010-04-29 Guy Lemire Fastener for bathing apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348120A (en) * 1979-05-11 1982-09-07 Oki Electric Industry Co. Ltd. Printing head for a dot printer
US4433926A (en) * 1979-09-03 1984-02-28 Oki Electric Industry Co., Ltd. Printer head

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7606042L (en) * 1975-10-10 1977-04-11 Florida Data Corp QUICK-OPERATING ELECTROMAGNETIC PRINTING HEAD
JPS54104925A (en) * 1978-02-01 1979-08-17 Suwa Seikosha Kk Dot printer head
GB2064874B (en) * 1979-12-10 1984-10-17 Florida Data Corp Electromagnetic actuator for high speed dot matrix impact printer
JPS5749576A (en) * 1980-09-11 1982-03-23 Nec Corp Printing head of dot matrix printer
US4351235A (en) * 1980-09-11 1982-09-28 Mannesmann Tally Corporation Dot printing mechanism for dot matrix line printers
JPS5993362A (en) * 1982-11-19 1984-05-29 Brother Ind Ltd Wire dot printer head
US4498791A (en) * 1983-03-28 1985-02-12 Texas Instruments Incorporated Printer having improved stored energy printhead

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348120A (en) * 1979-05-11 1982-09-07 Oki Electric Industry Co. Ltd. Printing head for a dot printer
US4433926A (en) * 1979-09-03 1984-02-28 Oki Electric Industry Co., Ltd. Printer head

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 203 (M-326)[1640], 18. September 1984; & JP - A - 59 93362 (BROTHER KOGYO K.K.) 29.05.1984 *

Also Published As

Publication number Publication date
EP0188669B1 (en) 1990-08-22
DE3502469A1 (en) 1986-07-31
JPS61172745A (en) 1986-08-04
EP0188669A2 (en) 1986-07-30
US4695174A (en) 1987-09-22
ATE55729T1 (en) 1990-09-15
DE3502469C2 (en) 1991-09-12
DE3579309D1 (en) 1990-09-27

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