GB1313273A - Printing apparatus - Google Patents

Printing apparatus

Info

Publication number
GB1313273A
GB1313273A GB2826971A GB2826971A GB1313273A GB 1313273 A GB1313273 A GB 1313273A GB 2826971 A GB2826971 A GB 2826971A GB 2826971 A GB2826971 A GB 2826971A GB 1313273 A GB1313273 A GB 1313273A
Authority
GB
United Kingdom
Prior art keywords
hammer
transistor
firing
fired
damping
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
GB2826971A
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.)
Potter Instrument Co Inc
Original Assignee
Potter Instrument Co 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 Potter Instrument Co Inc filed Critical Potter Instrument Co Inc
Publication of GB1313273A publication Critical patent/GB1313273A/en
Expired 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
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/495—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes by selective printing from a rotating helical member
    • 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
    • B41J9/42—Hammer-impression mechanisms with anti-rebound arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impact Printers (AREA)

Abstract

1313273 Selective printing POTTER INSTRUMENT CO Inc 16 June 1971 [25 June 1970] 28269/71 Heading B6F Hammer impression.-In a high speed printer, the hammers 13 are fired by first applying a firing pulse to the hammer and hammer and then applying a damping pulse to the hammer as the hammer is rebounding. The damping pulse cancels out the kinetic energy of the hammer and brings it more quickly to rest each time the hammer is fired. The firing circuit comprises a transistor 49 having the hammer coil connected in the collector circuit thereof and a resistance 51 in the emitter circuit thereof. When the hammer is fired the transistor is initially driven into saturation. When the transistor comes out of saturation, negative feedback maintains a constant current through the coil until the transistor is cut off, thus permitting the energy content of both the firing and damping pulses to be controlled by controlling the duration of the firing and damping pulses respectively.
GB2826971A 1970-06-25 1971-06-16 Printing apparatus Expired GB1313273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4976770A 1970-06-25 1970-06-25

Publications (1)

Publication Number Publication Date
GB1313273A true GB1313273A (en) 1973-04-11

Family

ID=21961615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2826971A Expired GB1313273A (en) 1970-06-25 1971-06-16 Printing apparatus

Country Status (5)

Country Link
US (1) US3678847A (en)
CA (1) CA938559A (en)
DE (1) DE2131710A1 (en)
FR (1) FR2097935A5 (en)
GB (1) GB1313273A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3843955A (en) * 1972-10-19 1974-10-22 Potter Instrument Co Inc Helical bar strip chart recorder
US3948168A (en) * 1974-08-14 1976-04-06 Willison K. Vance Digital printer
US4019100A (en) * 1975-05-16 1977-04-19 Printronix, Inc. Print hammer energizing and control circuit
US4062285A (en) * 1975-10-15 1977-12-13 Xerox Corporation Hammer driver controller for impact printers
US4291992A (en) * 1979-05-22 1981-09-29 R. C. Sanders Technology Systems, Inc. Printer pin control circuitry
DE2933616C2 (en) * 1979-08-20 1982-09-23 Siemens AG, 1000 Berlin und 8000 München Damping device for an electromagnetic drive designed as a hinged armature magnet system for the print hammer in a print hammer arrangement
DE2953825C1 (en) * 1979-08-20 1983-12-29 Siemens AG, 1000 Berlin und 8000 München Control device for the electromagnetic drive of a print hammer
US4273040A (en) * 1979-09-28 1981-06-16 International Business Machines Corporation Segmented drum bar helix printer
US4353656A (en) * 1980-10-14 1982-10-12 Xerox Corporation Moving coil, multiple energy print hammer system including a closed loop servo
US4348119A (en) * 1980-11-06 1982-09-07 General Electric Company Bounce control system for moving coil printing element
US4333398A (en) * 1980-11-06 1982-06-08 General Electric Company Driving force control system for impact printer
JPS57109678A (en) * 1980-12-27 1982-07-08 Ricoh Co Ltd Plunger type printing hammer
US4522122A (en) * 1983-05-03 1985-06-11 Ncr Canada Ltd - Ncr Canada Ltee Fast impact hammer for high speed printer
US4665371A (en) * 1983-10-27 1987-05-12 Ncr Corporation Character spacing circuit for controlling print hammer firing
US4743821A (en) * 1986-10-14 1988-05-10 International Business Machines Corporation Pulse-width-modulating feedback control of electromagnetic actuators
IT1215449B (en) * 1987-04-30 1990-02-14 Honeywell Inf Systems CONTROL CIRCUIT FOR POINT PRINTER HEAD
EP0603098B1 (en) * 1992-12-18 1998-02-04 International Business Machines Corporation Magneto-repulsion punching with dynamic damping
US6484613B1 (en) * 1993-07-27 2002-11-26 International Business Machines Corporation Electromagnetic bounce back braking for punch press and punch press process
WO1995005594A1 (en) * 1993-08-19 1995-02-23 Venturedyne Limited Particle sensor with low-pressure-drop air flow system
US5726568A (en) * 1995-06-07 1998-03-10 International Business Machines Corporation Magneto-repulsion punching with dynamic damping

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072045A (en) * 1958-06-02 1963-01-08 Bull Sa Machines Triggering electronic devices for the control of electromagnetic actuating devices
GB999372A (en) * 1961-03-30 1965-07-21 Scm Corp Tape feed
NL292717A (en) * 1962-05-16

Also Published As

Publication number Publication date
FR2097935A5 (en) 1972-03-03
US3678847A (en) 1972-07-25
CA938559A (en) 1973-12-18
DE2131710A1 (en) 1971-12-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]