Shiftable guide for a matrix printhead

Details Shiftable guide for a matrix printhead Shiftable guide for a matrix printhead

1989-02-10

1990-05-29

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

049291033

ABSTRACT:
A printhead for dot matrix printing has several styli arranged in one or two vertical columns so that the tips are arranged in one or two mouthpieces being independently movable. High-speed printing operates with a matrix per character having a number of horizontal line positions and as many vertical print positions as there are styli in a column. High-quality printing involves increasing the resolution in both directions, the number of horizontal positions possibly exceeding the number of vertical positions (the latter being an integral multiple larger than one of the numbers of styli in one column). Various structures are disclosed to shift one or two such mouthpieces in vertical direction.

REFERENCES:
patent: 3392814 (1968-07-01), Rasmussen
patent: 3759359 (1973-09-01), Stellmach
patent: 3900094 (1975-08-01), Larsen
patent: 4010835 (1977-03-01), Martin et al.
patent: 4086997 (1978-05-01), Wu
patent: 4256408 (1981-03-01), Shelton
patent: 4278359 (1981-07-01), Weikel
patent: 4459051 (1984-07-01), Kawai

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