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EP0500334A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Dot-matrix thermal recording device

Assignee: Riso Kagaku Corp
•
Filing: 1992-02-19
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Granted: —
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Expires: 2012-02-19
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Abstract

Abstract Provided is a device which can form favorable perforated images corresponding to the resolution of the thermal head, reproduce faithful printed images for all kinds of original picture images, avoid ink transfer, and adapt itself to different environmental conditions, and is suitable for use with different thermal recording materials such as thermal recording paper, OHP TP sheets, and thermal stencil master plates. In the device of the present invention, a thermal head 4 consisting of a plurality of heat emitting elements 5 arranged in a single row in the primary scanning direction is directly contacted to the recording surface of a thermal recording material such as thermal recording paper, and the thermal recording material 1 is moved relative to the thermal head 4 in the secondary scanning direction which is perpendicular to the direction of the row of the heat emitting elements so that picture images may be formed with a dot matrix by selectively heating the thermal heat emitting elements, the ratios of the length of each heat emitting element 5 in the primary and secondary scanning directions to the pitches of the primary and secondary scanning are set 30 to 70% and 60 to 95%, respectively.

Inventors

  • 👤 Takanori C/O Riso Kagaku Corp. Hasegawa
  • 👤 Koichi c/o Riso Kagaku Corp. Okusawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 18:32
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/345; B41C; B41C1/00; B41C1/14; B41C1/144; B41J2202/00; B41J2202/30; B41J2202/32

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 154 words
A thermal recording device for forming an image with a dot matrix by applying a thermal head consisting of a plurality of heat emitting elements arranged in a single row at a first pitch along a primary scanning direction onto a surface of a thermal recording material and moving said thermal recording material relative to said thermal head in a secondary scanning direction perpendicular to said primary scanning direction, and selectively heating said heat emitting elements for each successive movement of said thermal recording material at a second pitch in said secondary scanning direction, wherein: a ratio of a length of each of said heat emitting elements of said thermal head in said primary scanning direction to said first pitch is 30 to 70%, and a ratio of a length of each of said heat emitting elements of said thermal head in said secondary scanning direction to said second pitch is 60 to 95%.
Claim 2
Dependent Claim 154 words
A thermal recording device for forming an image with a dot matrix by applying a thermal head consisting of a plurality of heat emitting elements arranged in a single row at a first pitch along a primary scanning direction onto a surface of a thermal recording material and moving said thermal recording material relative to said thermal head in a secondary scanning direction perpendicular to said primary scanning direction, and selectively heating said heat emitting elements for each successive movement of said thermal recording material at a second pitch in said secondary scanning direction, wherein: a ratio of a length of each of said heat emitting elements of said thermal head in said primary scanning direction to said first pitch is 30 to 70%, and a ratio of a length of each of said heat emitting elements of said thermal head in said secondary scanning direction to said second pitch is 60 to 95%.
Claim 3
Dependent Claim 19 words
A thermal recording device according to claim 1, wherein said first pitch is substantially equal to said second pitch.
Claim 4
Dependent Claim 20 words
A thermal recording device according to claim 1, wherein said thermal recording material consists of a thermal stencil master plate.
Claim 5
Dependent Claim 18 words
A thermal recording device according to claim 1, wherein said thermal recording material consists of heat sensitive paper.
Claim 6
Dependent Claim 18 words
A thermal recording device according to claim 1, wherein said thermal recording material consists of thermal transfer ribbon.

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