Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1984-06-25
1987-05-12
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
400303, 101 9305, B41J 312
Patent
active
046645411
ABSTRACT:
A microprogrammed control apparatus for dot matrix serial printers and related printing method which allows increased horizontal resolution of the printing matrix and therefore the printing quality consistent with the restriction that no printing element can be actuated before a previous energization of any printing element has been completed. The increase of the horizontal resolution is obtained by using a character description matrix with high resolution and logic circuits responsive to binary configurations read out from such matrix. In a preferred alternative, the increase of the horizontal resolution is obtained by using a "compressed" character description matrix containing a plurality of printing patterns, one for each of the columns where printing has to be performed (hereinafter "column to be printed") and a corresponding plurality of codes, each related to a printing pattern and representative of the distance/time interval between the column to be printed and the previous column to be printed.
REFERENCES:
patent: 3627096 (1971-12-01), Finnegan
patent: 4204090 (1980-05-01), Heinzl
patent: 4278359 (1981-07-01), Weikel
patent: 4284362 (1981-08-01), Jackson
patent: 4458333 (1984-07-01), Smith
patent: 4468141 (1984-08-01), Rosza
patent: 4508463 (1985-04-01), Wang
Grayson George
Honeywell Information Systems Italia
Linnell William A.
Sewell Paul T.
Solakian John S.
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