EP0022480B1 - Elektromagnetischer Druckhammerantrieb - Google Patents

Elektromagnetischer Druckhammerantrieb Download PDF

Info

Publication number
EP0022480B1
EP0022480B1 EP80103384A EP80103384A EP0022480B1 EP 0022480 B1 EP0022480 B1 EP 0022480B1 EP 80103384 A EP80103384 A EP 80103384A EP 80103384 A EP80103384 A EP 80103384A EP 0022480 B1 EP0022480 B1 EP 0022480B1
Authority
EP
European Patent Office
Prior art keywords
print hammer
lever arm
magnet
hammer
lever
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
Application number
EP80103384A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0022480A1 (de
Inventor
Ho Chong Lee
David Howard Rickenbach
Jack Louis Zable
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 AT80103384T priority Critical patent/ATE3622T1/de
Publication of EP0022480A1 publication Critical patent/EP0022480A1/de
Application granted granted Critical
Publication of EP0022480B1 publication Critical patent/EP0022480B1/de
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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/38—Electromagnetic means
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/127—Mounting of hammers
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/133—Construction of hammer body or tip

Definitions

  • an electromagnetically operable printing hammer drive is also known, but which consists of a two-armed, rigid lever which can be pivoted about an axis.
  • the arm of the lever carrying the print hammer head rests on a permanent magnetic holding magnet, from which, however, it is released when an electromagnet acting on the other lever arm is excited.
  • the print hammer unit further comprises a hammer element 18 which is pivotally mounted on the shaft 19 in addition to the pole face 15 of the upper yoke leg 14.
  • the armature 20 of the hammer element 18 has a projection 21 which is aligned with the lower leg 12 of the yoke 10. This projection 21 is located essentially within the winding 11 and forms with the pole face 13 of the lower leg 12 a working air gap, which lies completely inside the working winding 11 during the rotary movement of the armature 20.
  • a second air gap is formed between the bevel 22 of the armature 20 and the beveled pole face 15 of the upper leg 14.
  • the bevel 22 extends parallel to the pole face 15 in the most advanced position of the armature 20.
  • a hole 40 (FIG.
  • a stop pad 27 made of a suitable material such as polyurethane is attached to the end of the arm 26.
  • the stop lug 24 hits this cushion 27, the elastic properties of which should essentially match the pressure medium 31 with the rebound characteristic.
  • the anchor 20 and the hammer head 29 begin to bounce back essentially simultaneously when the impact on the cushion 27 and the pressure medium 31 takes place simultaneously.
  • the hammer element 18 is made from a piece of magnetizable material.
  • the hammer head 29, the shaft 28 and the armature 20 are integrated into one part.
  • the depth of the shaft 28 with respect to the anchor 20 is also reduced.
  • the total weight of the hammer element 18 is thus reduced and, in addition, the possibility is given to give the shaft 28 the desired flexibility in order to allow the shaft to bend and the hammer head to move independently of the anchor mass 20.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impact Printers (AREA)
  • Electronic Switches (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP80103384A 1979-07-11 1980-06-18 Elektromagnetischer Druckhammerantrieb Expired EP0022480B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103384T ATE3622T1 (de) 1979-07-11 1980-06-18 Elektromagnetischer druckhammerantrieb.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56486 1979-07-11
US06/056,486 US4269117A (en) 1979-07-11 1979-07-11 Electro-magnetic print hammer

Publications (2)

Publication Number Publication Date
EP0022480A1 EP0022480A1 (de) 1981-01-21
EP0022480B1 true EP0022480B1 (de) 1983-06-01

Family

ID=22004718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103384A Expired EP0022480B1 (de) 1979-07-11 1980-06-18 Elektromagnetischer Druckhammerantrieb

Country Status (10)

Country Link
US (1) US4269117A (enrdf_load_stackoverflow)
EP (1) EP0022480B1 (enrdf_load_stackoverflow)
JP (1) JPS5615378A (enrdf_load_stackoverflow)
AT (1) ATE3622T1 (enrdf_load_stackoverflow)
AU (1) AU528596B2 (enrdf_load_stackoverflow)
BR (1) BR8004295A (enrdf_load_stackoverflow)
CA (1) CA1139004A (enrdf_load_stackoverflow)
DE (1) DE3063597D1 (enrdf_load_stackoverflow)
ES (1) ES8102915A1 (enrdf_load_stackoverflow)
IT (1) IT1148842B (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4397234A (en) * 1981-12-30 1983-08-09 International Business Machines Corporation Electromagnetic print hammer coil assembly
US4423675A (en) * 1982-03-08 1984-01-03 Hewlett-Packard Company Magnetic circuit and print hammer
US4522122A (en) * 1983-05-03 1985-06-11 Ncr Canada Ltd - Ncr Canada Ltee Fast impact hammer for high speed printer
US4503768A (en) * 1983-07-11 1985-03-12 Mannesmann Tally Corporation Single piece hammer module
US4703689A (en) * 1985-09-20 1987-11-03 International Business Machines Corporation Two lever print actuator with aligned pivots and energy transfer surfaces
US4756246A (en) * 1987-10-13 1988-07-12 International Business Machines Corporation Lubrication system for print hammer pivot pin
CA2040993C (en) * 1990-04-25 2001-08-07 Yoshiaki Inoue Oxygen absorbent composition and method of preserving article with same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705370A (en) * 1971-04-15 1972-12-05 Ibm Magnetically actuated and restored print hammer
US3711804A (en) * 1971-04-15 1973-01-16 Ibm Magnetically restorable high speed print hammer
US3747521A (en) * 1971-06-25 1973-07-24 Ibm Low cost hammer unit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195453A (en) * 1962-12-26 1965-07-20 Potter Instrument Co Inc Magnetically actuated print hammer
US3266418A (en) * 1963-12-02 1966-08-16 Anelex Corp Print hammer assembly for high speed printers
FR1501069A (fr) * 1965-09-30 1967-11-10 Olivetti General Electric Spa Module d'impression pour imprimante à grande vitesse
US3459976A (en) * 1966-07-05 1969-08-05 Mohawk Data Sciences Corp Rotary electrodynamic driver
US3547028A (en) * 1968-02-02 1970-12-15 Sherwood Medical Ind Inc Vibratable platen means in selective printing machines
US3714892A (en) * 1970-10-20 1973-02-06 Odec Computer Syst Inc Impact hammer for liner printer
US3741113A (en) * 1971-06-25 1973-06-26 Ibm High energy print hammer unit with fast settle out
US3919933A (en) * 1973-10-05 1975-11-18 Potter Instrument Co Inc High speed printer
US4018155A (en) * 1975-06-02 1977-04-19 Mohawk Data Sciences Corporation Ballistic print hammer assembly
US4233894A (en) * 1978-06-02 1980-11-18 Printronix, Inc. Print hammer mechanism having dual pole pieces

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705370A (en) * 1971-04-15 1972-12-05 Ibm Magnetically actuated and restored print hammer
US3711804A (en) * 1971-04-15 1973-01-16 Ibm Magnetically restorable high speed print hammer
US3747521A (en) * 1971-06-25 1973-07-24 Ibm Low cost hammer unit

Also Published As

Publication number Publication date
ES493278A0 (es) 1981-02-16
US4269117A (en) 1981-05-26
EP0022480A1 (de) 1981-01-21
JPH0331586B2 (enrdf_load_stackoverflow) 1991-05-07
BR8004295A (pt) 1981-01-27
ATE3622T1 (de) 1983-06-15
IT1148842B (it) 1986-12-03
AU528596B2 (en) 1983-05-05
CA1139004A (en) 1983-01-04
ES8102915A1 (es) 1981-02-16
AU5901480A (en) 1981-01-15
IT8022714A0 (it) 1980-06-11
DE3063597D1 (en) 1983-07-07
JPS5615378A (en) 1981-02-14

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