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EP0160318A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Printing system for dot-matrix printer

Assignee: Oki Electric Industry Co Ltd
•
Filing: 1985-05-02
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Granted: —
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Expires: 2005-05-02
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Abstract

Abstract A printing system for a dot-matrix printer for printing a dot-matrix character or graphic pattern with a print head having head pins. The printing system includes a memory for storing preceding data printed by the head pins, a register for storing input data, a processing circuit for processing the stored preceding data from the memory and the input data from the register to modify the input data by omitting certain data items thereof, and a print head driver for enabling the print head to print the modified input data. When the printing system operates in a high-speed printing mode, the character or graphic pattern with certain dots skipped can be printed at a higher speed. When the printing system operates in a normal-speed printing mode, the character or graphic pattern with certain dots skipped can be printed at a lower speed with low noises.

Inventors

  • 👤 Norio Oki Electric Ind. Co. Ltd. Shimoyama
  • 👤 Kohtaroh Oki Electric Ind. Co. Ltd. Yoshimura
  • 👤 Takeshi Oki Electric Ind. Co. Ltd. Matsumura
  • 👤 Motonobu Oki Electric Ind. Co. Ltd. Hatakeyama

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 14:17
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/485; B41J2/505; B41J2/5056; B41J2/5058; G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K2215/00; G06K2215/0002; G06K2215/0062; G06K2215/0071; G06K2215/0074

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 93 words
A printing system for a dot-matrix printer for printing a dot-matrix character or graphic pattern with a print head having head pins, said printing system comprising: (a) a memory for storing preceding data printed by said head pins: (b) a register for storing input data; (c) a processing circuit for processing said stored preceding data from said memory and said input data from said register to modify said input data by omitting certain data items thereof; and (d) a print head driver for enabling said print head to print said modified input data.
Claim 2
Dependent Claim 93 words
A printing system for a dot-matrix printer for printing a dot-matrix character or graphic pattern with a print head having head pins, said printing system comprising: (a) a memory for storing preceding data printed by said head pins: (b) a register for storing input data; (c) a processing circuit for processing said stored preceding data from said memory and said input data from said register to modify said input data by omitting certain data items thereof; and (d) a print head driver for enabling said print head to print said modified input data.
Claim 3
Dependent Claim 32 words
A printing system according to claim 1, including a printing speed control circuit for controlling said print head driver to print said modified input data selectively in high- and normal-speed printing modes.
Claim 4
Dependent Claim 28 words
A printing system according to claim 1, wherein said processing circuit comprises an exclusive-OR gate and an AND gate for processing said preceding data and said input data.

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