Impact dot matrix printer

Details Impact dot matrix printer Impact dot matrix printer

1985-08-30

1987-03-31

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400 54, 400124, B41J 312

Patent

active

046539417

ABSTRACT:
An impact dot matrix printer is disclosed in which a print head consisting of an array of dot pins constituted by wires arranged in a vertical direction faces a printing sheet via an ink ribbon and is reciprocable along a horizontal direction. While the print head is moved reciprocally, the dot pin array is driven according to printing data to print a dot pattern consisting of a plurality of dots in a dot matrix, the printing sheet being fed by one line pitch in a vertical direction after printing of each line. The printer comprises first detecting means for detecting the position of the print head during reciprocating, second detecting means for detecting the number of cycles of movement of the print head executed during printing of a dot pattern for one line, means for judging whether to permit dot printing according to the outputs of the first and second detecting means, driver means for driving the print head according to the output of the judging means and printing data, and a sheet feeding mechanism for feeding the printing sheet in the vertical direction for every N cycle (N being a positive integer) of the print head.

REFERENCES:
patent: 4284362 (1981-08-01), Jackson
IBM Tech. Disc. Bulletin, by B. R. Cavill, vol. 24, No. 11A, Apr. 1982, pp. 5430-5432.

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