Digital printhead energy control system

Details Digital printhead energy control system Digital printhead energy control system

1988-03-25

1989-06-13

Sewell, Paul T.

Printing

Selective or progressive

Bed and platen machines

4001573, 400166, 361152, B41J 792, B41J 938

Patent

active

048381578

ABSTRACT:
A digital printhead energy control system includes a first storage device for receiving hammer pulse duration data, a second storage device for receiving hammer pulse energization data and for producing a trigger signal and hammer pulse energization signals, a counter for counting to a value equal to the value stored in the first storage device, a comparator for comparing the value stored in the first storage device with the incrementing counter value, latch means for latching the output of the comparator to produce an end pulse signal, first gating means for combining the end pulse signal and a reset signal for controlling the clearing of the second storage device and terminating the hammer pulse energization signals, and second gating means for combining the trigger signal and a reset signal for controlling the clearing of the counter.

REFERENCES:
patent: 3628100 (1971-12-01), Zettler
patent: 4048665 (1977-09-01), Lia et al.
patent: 4103617 (1978-08-01), O'Brien et al.
patent: 4162131 (1979-07-01), Carson, Jr. et al.
patent: 4293233 (1981-10-01), Hoffman
patent: 4407193 (1983-10-01), Hall et al.
patent: 4597328 (1986-07-01), Carrington
patent: 4653945 (1987-03-01), Sato et al.
patent: 4667117 (1987-05-01), Nebgen et al.
patent: 4683817 (1987-08-01), Del Signore, II
IBM Technical Disclosure Bulletin, vol. 21, No. 3 (8/78) entitled, "Pulse-Width Modulation of Magnets", pp. 1107-1108.
IBM Technical Disclosure Bulletin, vol. 22, No. 8A (1/80) entitled, "Controller for Electromechanical Printhammer", pp. 3294-3295.

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