Printing – Selective or progressive – Bed and platen machines
Patent
1974-02-20
1977-01-25
Coven, Edward M.
Printing
Selective or progressive
Bed and platen machines
B41J 792
Patent
active
040045048
ABSTRACT:
An arrangement in a printer of the kind having a type drum with printing types arranged line-wise around the periphery, which drum is mounted on a rotatable shaft, and a number of movable hammers actuated by individual electro-magnets for producing printing of a type upon excitation of the associated magnet by impact of the hammer against the drum. The excitation is effected under cooperation with a position sensing device indicating the position of the shaft, and consequently the type which is in position for printing. A memory device is adapted to produce excitation of predetermined electro-magnets on basis of the information in the memory device and the output signal from the position sensing device.
REFERENCES:
patent: 2935935 (1960-05-01), Preston et al.
patent: 3144821 (1964-08-01), Dreiza
patent: 3172353 (1965-03-01), Helms
patent: 3218965 (1965-11-01), Simons et al.
patent: 3443514 (1969-05-01), Schwartz
patent: 3513774 (1970-05-01), Pawletko et al.
patent: 3661077 (1972-05-01), Findlay et al.
IBM Technical Disclosure Bulletin, vol. 5, No. 11, Apr. 1963, pp. 27-29.
Coven Edward M.
Trifari Frank R.
U.S. Philips Corporation
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