Impression control mechanism for a typewriter

Details Impression control mechanism for a typewriter Impression control mechanism for a typewriter

1980-04-11

1982-11-16

Pieprz, William

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by pivoting of type-head-carrier and type-head...

4001573, 101 9303, B41J 132

Patent

active

043592872

ABSTRACT:
Print impression control mechanism for regulating the impact velocity of a single element printing head against a platen. The printing head is normally retained to a rest position which is in a fixedly spaced relationship to the platen independent of manual adjustment of an impression control lever so as to provide best visibility of printed characters on the record medium. In a first part of each print cycle, the head is brought to an intermediate position from which it is accelerated to get sufficient velocity for printing in a subsequent second part of the print cycle. Such an intermediate position is determined depending upon manual adjustment of the control lever whereby the impression of the printed characters can be determined accordingly.

REFERENCES:
patent: 1918300 (1933-07-01), Trego
patent: 3651710 (1972-03-01), Burkett et al.
patent: 3788443 (1974-01-01), Menzi
patent: 3888339 (1975-06-01), Nowak et al.
patent: 3980169 (1976-09-01), Decker et al.
patent: 4119384 (1978-10-01), Keiter
Schaefer "Electronic Control . . . ", IBM Tech. Discl. Bulletin vol. 21, No. 10, pp. 4110-4112, 3/79.

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