Title:
【発明の名称】シリアルドットマトリクスプリンタ
Document Type and Number:
Japanese Patent JP2645350
Kind Code:
B2
Abstract:
A serial dot matrix printer is provided with a slit encoder and an optical sensor opposed to the slit encoder. In the slit encoder, firing signal slits each having a fixed width are provided at a fixed pitch, and block signal slits each having a width smaller than that of each firing signal slit are provided in every block composed of a plurality of the firing signal slits. As a carriage moves, the optical sensor moves along the slit encoder to produce a signal at every slit. The signal from the optical sensor is applied to a first control device having a block detector and a firing timing unit. The block detector receives the signal from the optical sensor, measures the passing time between every slit, and detects a block signal according to a difference in passing time between the slits. The firing timing unit produces firing timing signals obtained by equally dividing the passing time of each of the firing signal slits by a predetermined number whenever the passing time of the each firing signal slit is measured. There is further provided a second control device having a carriage controller for controlling a carriage moving motor according to the block signal.
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Inventors:
OGURA WATARU
Application Number:
JP1796787A
Publication Date:
August 25, 1997
Filing Date:
January 28, 1987
Export Citation:
Assignee:
CHINON KK
International Classes:
B41J2/51; B41J19/20; B41J19/18; (IPC1-7): B41J2/51; B41J19/18
Domestic Patent References:
| JP61217278A | ||||
| JP532117A | ||||
| JP5171628A | ||||
| JP6161882A | ||||
| JP6023091A | ||||
| JP61242457A | ||||
| JP54138447A | ||||
| JP57149140U | ||||
| JP57149141U |
Attorney, Agent or Firm:
Kabazawa Xiang (3 people outside)