HK27079A - Method and apparatus for enhancing and maintaining character quality in thermal printers - Google Patents

Method and apparatus for enhancing and maintaining character quality in thermal printers

Info

Publication number
HK27079A
HK27079A HK270/79A HK27079A HK27079A HK 27079 A HK27079 A HK 27079A HK 270/79 A HK270/79 A HK 270/79A HK 27079 A HK27079 A HK 27079A HK 27079 A HK27079 A HK 27079A
Authority
HK
Hong Kong
Prior art keywords
enhancing
thermal printers
character quality
maintaining character
maintaining
Prior art date
Application number
HK270/79A
Other languages
English (en)
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of HK27079A publication Critical patent/HK27079A/xx

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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • B41J2/37—Print density control by compensation for variation in current
HK270/79A 1974-09-23 1979-04-26 Method and apparatus for enhancing and maintaining character quality in thermal printers HK27079A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/508,111 US3934695A (en) 1974-09-23 1974-09-23 Method and apparatus for enhancing and maintaining character quality in thermal printers

Publications (1)

Publication Number Publication Date
HK27079A true HK27079A (en) 1979-05-04

Family

ID=24021426

Family Applications (1)

Application Number Title Priority Date Filing Date
HK270/79A HK27079A (en) 1974-09-23 1979-04-26 Method and apparatus for enhancing and maintaining character quality in thermal printers

Country Status (7)

Country Link
US (1) US3934695A (xx)
JP (2) JPS5524432B2 (xx)
CA (1) CA1059578A (xx)
DE (2) DE2540686C2 (xx)
GB (1) GB1503970A (xx)
HK (1) HK27079A (xx)
IT (1) IT1047502B (xx)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2291035A1 (fr) * 1974-11-14 1976-06-11 Sagem Perfectionnements apportes aux dispositifs d'impression d'informations d'un premier et d'un second types qui comprennent au moins une tete d'impression
JPS52141526A (en) * 1975-10-27 1977-11-25 Seiko Epson Corp Voltage and temperature compensating control of thermal printer
DE2603347C3 (de) * 1976-01-29 1980-06-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anordnung zum Aufzeichnen von Zeichen aus matrixartig gerasterten Zeichenelementen
JPS5353223A (en) * 1976-10-25 1978-05-15 Epson Corp Circuit for compensating voltage of thermal printer
JPS53102124A (en) * 1977-02-15 1978-09-06 Hitachi Ltd Dot driving system
US4192618A (en) * 1977-03-28 1980-03-11 Lrc, Inc. High speed ticket printer
DE2725352C2 (de) * 1977-06-04 1982-12-09 Helmut Dipl.-Ing. 8000 München Gröttrup Aus Druckstempeln und Ankern bestehende, gemeinsam auswechselbare Einheit für ein Mosaikdruckwerk
JPS5497438A (en) * 1978-01-18 1979-08-01 Hitachi Ltd Heat sensitive recording device
JPS5563278A (en) * 1978-11-02 1980-05-13 Ricoh Co Ltd Multi-head ink jet recorder
JPS5551573A (en) * 1978-10-10 1980-04-15 Ibm Thermal printer
US4242003A (en) * 1978-10-16 1980-12-30 Xerox Corporation Multi-pass matrix printing
JPS5560351U (xx) * 1978-10-20 1980-04-24
JPS55124674A (en) * 1979-03-22 1980-09-25 Fuji Xerox Co Ltd Driver for thermosensitive recording head
FR2457771A1 (fr) * 1979-06-01 1980-12-26 Thomson Csf Dispositif de commande de la tension d'alimentation d'une tete d'impression thermique et imprimante thermique comportant un tel dispositif
US4246587A (en) * 1979-09-04 1981-01-20 Gould Inc. Thermal array protection method and apparatus
US4347518A (en) * 1979-09-04 1982-08-31 Gould Inc. Thermal array protection apparatus
JPS5695680A (en) * 1979-12-28 1981-08-03 Seiko Epson Corp Dot printer
DE3003966C2 (de) * 1980-02-04 1982-06-09 Speidel + Keller Gmbh + Co Kg, 7455 Jungingen Schaltungsanordnung zum Ansteuern von Schreibelektroden zur Aufzeichnung eines Analogsignals
JPS6010914B2 (ja) * 1980-02-14 1985-03-20 松下電送株式会社 感熱記録装置
JPS56117664A (en) * 1980-02-22 1981-09-16 Canon Inc Dot matrix printer
JPS6027577B2 (ja) * 1980-03-12 1985-06-29 株式会社東芝 熱記録装置
US4350449A (en) * 1980-06-23 1982-09-21 International Business Machines Corporation Resistive ribbon printing apparatus and method
JPS5779761A (en) * 1980-11-05 1982-05-19 Sony Corp Drive method for thermo-sensing picture display device
US4376942A (en) * 1980-12-01 1983-03-15 Cubic Western Data Thermal printing system
JPS6036949B2 (ja) * 1980-12-29 1985-08-23 エプソン株式会社 サ−マルプリンタの駆動回路
JPS57128570A (en) * 1981-02-03 1982-08-10 Canon Inc Printer
JPS57181882A (en) * 1981-05-01 1982-11-09 Sharp Corp Printing density control device in thermal printer
JPS582918A (ja) * 1981-06-30 1983-01-08 Canon Inc 電子機器
JPS58150370A (ja) * 1982-03-02 1983-09-07 Sony Corp プリンタにおける階調信号発生回路
FR2547556B1 (fr) * 1983-04-14 1988-07-15 Monarch Marking Systems Inc Etiqueteuse comportant un dispositif d'impression thermographique
AU2609884A (en) * 1983-04-14 1984-10-18 Monarch Marking Systems Inc. Labeller with thermographic printer
US4783667A (en) * 1987-07-17 1988-11-08 Ncr Canada Ltd - Ncr Canada Ltee Printing of angled and curved lines using thermal dot matrix printer
FR2696978B1 (fr) * 1992-10-19 1994-12-09 Sca Gemplus Procédé d'impression par transfert thermique.
EP0595095B1 (en) * 1992-10-29 1996-07-31 Eastman Kodak Company Thermal printer system and operating method
US6095700A (en) * 1993-10-30 2000-08-01 Asahi Kogaku Kogyo Kabushiki Kaisha Battery operated thermal printer with means to optimize battery life
US6784908B2 (en) 2000-11-16 2004-08-31 Olympus Corporation Printer
US7880755B1 (en) 2008-04-17 2011-02-01 Lathem Time Multi-segment multi-character fixed print head assembly
GB2577264A (en) * 2018-09-18 2020-03-25 Pryor Edward & Son Dot marking machine

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL212759A (xx) * 1955-12-12
BE639289A (xx) * 1962-11-01
US3467810A (en) * 1967-10-02 1969-09-16 Ncr Co Thermal printing selection circuitry
GB1190709A (en) * 1967-12-05 1970-05-06 Henning Gunnar Carlsen A Thermoprinting Device.
US3509980A (en) * 1968-03-12 1970-05-05 Ncr Co Thermal printer
GB1171412A (en) * 1968-04-04 1969-11-19 Standard Telephones Cables Ltd A Character Generation System
US3512158A (en) * 1968-05-02 1970-05-12 Bunker Ramo Infra-red printer
GB1284939A (en) * 1968-12-31 1972-08-09 Texas Instruments Inc Electronic thermal devices for producing thermal patterns representing characters
US3577137A (en) * 1968-12-31 1971-05-04 Texas Instruments Inc Temperature compensated electronic display
US3725898A (en) * 1971-05-03 1973-04-03 Texas Instruments Inc Temperature compensated multiple character electronic display
JPS556076B1 (xx) * 1971-07-13 1980-02-13
JPS5315378B2 (xx) * 1971-08-05 1978-05-24
IT939920B (it) * 1971-10-04 1973-02-10 Olivetti & Co Spa Unita di stampa termografica
US3754278A (en) * 1971-12-01 1973-08-21 American Micro Syst Thermal printing system
US3845850A (en) * 1973-02-22 1974-11-05 Bowmar Instrument Corp Thermal printer

Also Published As

Publication number Publication date
JPS5159641A (xx) 1976-05-24
GB1503970A (en) 1978-03-15
CA1059578A (en) 1979-07-31
IT1047502B (it) 1980-10-20
DE2540686A1 (de) 1976-04-01
DE2559563A1 (de) 1977-03-10
DE2540686C2 (de) 1985-01-31
JPS58125037U (ja) 1983-08-25
US3934695A (en) 1976-01-27
JPS5928849Y2 (ja) 1984-08-20
JPS5524432B2 (xx) 1980-06-28

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