Print hammer flight time control system

Details Print hammer flight time control system Print hammer flight time control system

1984-11-30

1986-07-01

Burr, Edgar S.

Printing

Selective or progressive

Bed and platen machines

101 9303, 101 9314, 400166, B41J 127

Patent

active

045973288

ABSTRACT:
A hammer timing control system for the print hammers of a line printer uses a plurality of read/write RAMs in place of individual fire control circuits for controlling the firing periods of the hammers. A delay value RAM stores individual delay values to be interposed before each hammer is fired, and a terminate fire RAM stores a delay value to be interposed before the firing of a hammer is terminated. The hammers are turned on and turned off by signals incrementally clocked out from two pairs of RAMs which store each hammer address at memory locations corresponding to the hammer's assigned delay values.

REFERENCES:
patent: 3845710 (1974-11-01), Brodrueck
patent: 4384520 (1983-05-01), Nakano et al.
patent: 4440079 (1984-04-01), Dayger et al.
IBM Technical Disclosure Bulletin, "Variable Control of Print Hammer on Time" by Gibb et al., vol. 24, No. 9, Feb. '82, pp. 4705-4706.
IBM Technical Disclosure Bulletin, "Print Hammer Flight Time Compensation" by Dayger, vol. 24, No. 1A, Jun. '81, pp. 18-19.

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