Hammer energy impact control using read only memory

Details Hammer energy impact control using read only memory Hammer energy impact control using read only memory

1977-01-10

1978-08-01

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101 9319, B41J 792

Patent

active

041036174

ABSTRACT:
In impact printing mechanism for encoding magnetic or optical characters on documents, a hammer energy control is utilized for maintaining constant impact pressure for the various surface areas of such characters. The constant impact pressure is derived by selection of the correct hammer pulse width for the surface area of each character.

REFERENCES:
patent: 3144821 (1964-08-01), Drejza
patent: 3172353 (1965-03-01), Helms
patent: 3712212 (1973-01-01), Beery
patent: 3858509 (1975-01-01), Grundherr
Barrow et al., IBM Tech. Discl. Bulletin, vol. 19, No. 8, 1/77, pp. 3107-3108.

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