EP0322727A2 - Générateur de caractères pour imprimante à tête matricielle - Google Patents

Générateur de caractères pour imprimante à tête matricielle Download PDF

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Publication number
EP0322727A2
EP0322727A2 EP88121361A EP88121361A EP0322727A2 EP 0322727 A2 EP0322727 A2 EP 0322727A2 EP 88121361 A EP88121361 A EP 88121361A EP 88121361 A EP88121361 A EP 88121361A EP 0322727 A2 EP0322727 A2 EP 0322727A2
Authority
EP
European Patent Office
Prior art keywords
character
character generator
microprocessor
print head
matrix
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Withdrawn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
EP88121361A
Other languages
German (de)
English (en)
Other versions
EP0322727A3 (fr
Inventor
Ralf Dipl.-Ing. Harbers
Peter Spoerl
Wolfgang Dipl.-Ing. Leelkok
Franz Dipl.-Ing. Kreutzburg
Bodo Christoffers
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.)
AEG Olympia Office GmbH
Original Assignee
AEG Olympia AG
AEG Olympia Office GmbH
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 AEG Olympia AG, AEG Olympia Office GmbH filed Critical AEG Olympia AG
Publication of EP0322727A2 publication Critical patent/EP0322727A2/fr
Publication of EP0322727A3 publication Critical patent/EP0322727A3/fr
Withdrawn legal-status Critical Current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
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/30—Character or syllable selection controlled by recorded information
    • B41J5/44—Character or syllable selection controlled by recorded information characterised by storage of recorded information

Definitions

  • the invention relates to a character generator for a printing device with a matrix print head, in particular with a thermal print head in a typewriter or office machine of a similar type of the type specified in the preamble of claim 1.
  • the printing is done by converting character code data supplied from a processing computer into the output characters corresponding to dot patterns which are stored in advance.
  • This principle is used for example in thermal printers, dot-matrix printers, laser beam printers and the like.
  • the characters in the different fonts can be printed out by using character pattern generators or character generators for the respective different fonts, whereby alienation of the character patterns (oblique, double-width, narrow-type) is possible.
  • a character generator such as a permanent memory (ROM) or read / write memory (RAM) is known as a cassette or plug-in unit, which is detachably or interchangeably connected to a socket attached to the printing device.
  • ROM permanent memory
  • RAM read / write memory
  • the known image generation devices which have both a built-in and an interchangeably arranged character generator, all have the disadvantage that the character preparation is separated from the character generator ordered control device, e.g. B. via the microprocessor, which also controls the printing unit carriage, the platen, the ribbon drive, etc. This threatens to overload this control device due to the many functions to be controlled, which must be taken into account or prevented in a system design.
  • a further disadvantage of these character generators is that their maximum memory size and the storage or optimization method for the stored fonts must be determined beforehand.
  • the invention has for its object to provide a character generator with which the performance and reliability of the known printing devices with matrix printers is increased. This object is achieved by the invention characterized in claim 1.
  • the microprocessor co-arranged in the character generator takes over the preparation of the character matrix, fewer lines are required compared to the known arrangements. This also relieves the load on the central control unit and the print control device (print controller), which at the same time increases the performance of the machine. Furthermore, the character generator enables a longer line routing without the reliability of the circuit arrangement being impaired.
  • the character generator and control device form a unit, no definition of a certain maximum memory size, a certain microprocessor and / or certain optimization method is required.
  • FIG. 1 shows an input keyboard 1, from which generated character code data and control commands are fed to a central control unit (CPU) 2 via an input buffer (not shown).
  • This control unit is operatively connected to a program memory (ROM) 14, a read-write memory or working memory (RAM) 15 and a printing controller 3 in a known manner.
  • This pressure control device 3 (z. B. a one-chip computer) contains drivers z. B. for driving a printing unit carriage 4, for advancing a paper roll 5 and for driving a ribbon device 6.
  • sockets 9, 17 are provided in the housing 13 of the machine for character generators 10, 16 designed as interchangeable fonts, which have a Line 8 are in operative connection with a matrix print head 12 and the pressure control device 3.
  • This matrix print head is in particular a thermal print head.
  • the interchangeable character generators 10, 16 each have their own microprocessor 18, 19, so that the character matrix can be processed directly in the character generators 10, 16 that are controlled. This has the great advantage that the matrix print head 12 is controlled directly by the respective character generator 10, 16. As a result, the central control unit 2 and the printing control device 3 are greatly relieved. In addition, only a few data lines are required by the so-called intelligent character generator 10, 16.
  • the fonts can consist of a single-chip computer.
  • the character information is then in its mask ROM.
  • a font can also consist of a microprocessor with ROM and RAM.
  • the matrix information of a character set is then accommodated in the ROM.
  • Another character set can then be loaded from outside into the RAM memory.
  • the individual elements of the fonts could be accommodated in a cartridge or in the form of check cards (using SMD technology).
EP88121361A 1987-12-24 1988-12-21 Générateur de caractères pour imprimante à tête matricielle Withdrawn EP0322727A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3744263 1987-12-24
DE19873744263 DE3744263A1 (de) 1987-12-24 1987-12-24 Zeichengenerator fuer eine druckvorrichtung mit einem matrixdruckkopf

Publications (2)

Publication Number Publication Date
EP0322727A2 true EP0322727A2 (fr) 1989-07-05
EP0322727A3 EP0322727A3 (fr) 1990-01-31

Family

ID=6343718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121361A Withdrawn EP0322727A3 (fr) 1987-12-24 1988-12-21 Générateur de caractères pour imprimante à tête matricielle

Country Status (2)

Country Link
EP (1) EP0322727A3 (fr)
DE (1) DE3744263A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706655A1 (fr) * 1993-06-17 1994-12-23 Gemplus Card Int Procédé de contrôle d'une imprimante pour obtenir des affranchissements postaux.
EP0689158A2 (fr) * 1990-04-12 1995-12-27 Canon Kabushiki Kaisha Appareil de traitement d'information à programme commutable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012806A1 (fr) * 1978-11-21 1980-07-09 Olympia Werke Ag Machine à écrire comportant un porte caractère monté dans une cassette interchangeable
EP0181949A1 (fr) * 1984-11-14 1986-05-28 Mannesmann Tally Ges. mbH Imprimante, en particulier imprimante matricielle
GB2193162A (en) * 1986-08-01 1988-02-03 Alps Electric Co Ltd Dot printers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012806A1 (fr) * 1978-11-21 1980-07-09 Olympia Werke Ag Machine à écrire comportant un porte caractère monté dans une cassette interchangeable
EP0181949A1 (fr) * 1984-11-14 1986-05-28 Mannesmann Tally Ges. mbH Imprimante, en particulier imprimante matricielle
GB2193162A (en) * 1986-08-01 1988-02-03 Alps Electric Co Ltd Dot printers

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0689158A2 (fr) * 1990-04-12 1995-12-27 Canon Kabushiki Kaisha Appareil de traitement d'information à programme commutable
EP0689158A3 (fr) * 1990-04-12 1996-01-17 Canon Kk
EP0881593A2 (fr) * 1990-04-12 1998-12-02 Canon Kabushiki Kaisha Appareil de traitement d'information à programme commutable
EP0881593A3 (fr) * 1990-04-12 1999-02-03 Canon Kabushiki Kaisha Appareil de traitement d'information à programme commutable
US5878275A (en) * 1990-04-12 1999-03-02 Canon Kabushiki Kaisha Information processing apparatus which discriminates whether or not input information is stored in memory and controlling the switching from a first control program to a second control program
US6154795A (en) * 1990-04-12 2000-11-28 Canon Kabushiki Kaisha System for switching from control program stored in an output apparatus to control program stored in detachable memory based on discriminated feeding status of recording medium
US6397271B1 (en) 1990-04-12 2002-05-28 Canon Kabushiki Kaisha System for switching from a first control program to a second control program based on discriminated transport status of recording medium
FR2706655A1 (fr) * 1993-06-17 1994-12-23 Gemplus Card Int Procédé de contrôle d'une imprimante pour obtenir des affranchissements postaux.
WO1995000929A1 (fr) * 1993-06-17 1995-01-05 Gemplus Card International Procede de controle d'une imprimante pour obtenir des affranchissements postaux
US5688056A (en) * 1993-06-17 1997-11-18 Gemplus Card International Method for controlling a printer in order to obtain postages

Also Published As

Publication number Publication date
DE3744263A1 (de) 1989-07-13
EP0322727A3 (fr) 1990-01-31

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