Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1984-10-31
1985-11-19
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
400322, B41J 312, B41J 1930
Patent
active
045538638
ABSTRACT:
A method and apparatus for tolerance compensation in matrix printing devices. A time duration is defined between the edge of a scan clock period formed by sensing motion of a printer carriage and a criterion formed at a start of a printing line. The time duration is identified in a measuring operation executed before the actual printing event and is compared to an upper and to a lower time threshold. If the time duration is below the lower time threshold or above the upper threshold, an output signal is emitted which delays a start of the print clock generation at a beginning of the printing line for the following actual print event.
REFERENCES:
patent: 4076111 (1978-02-01), Robinson et al.
patent: 4195938 (1980-04-01), Velazquez
patent: 4208137 (1980-06-01), Liu
patent: 4284362 (1981-08-01), Jackson et al.
patent: 4448553 (1984-05-01), Yonezawa et al.
Sewell Paul T.
Siemens Aktiengesellschaft
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