Printing head and its drive timing control circuit for impact pr

Details Printing head and its drive timing control circuit for impact pr Printing head and its drive timing control circuit for impact pr

1993-03-18

1995-01-31

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

40012404, B41J 230

Patent

active

053854144

ABSTRACT:
In a serial impact printer, a printing head having an impact wire pin array of two arrangement lines is mounted on a carriage in such a way that the pin arrangement lines are inclined by an angle .theta. with respect to the virtual vertical direction. The respective wire pins in the array are driven at timings different delay time by delay time according to the inclination angle .theta.. The control circuit for determining the drive timings comprises a circuit for turning on the respective wire pins at the delay time intervals and a circuit for turning off the respective wire pins in sequence at the delay time intervals after a predetermined time has elapsed. It is desirable that the inclination angle .theta. satisfies the following formula:

REFERENCES:
patent: 4071130 (1978-01-01), Lichti
patent: 4567570 (1986-01-01), Peer
patent: 5048984 (1991-09-01), Kringe et al.
patent: 5150108 (1992-09-01), Markham
patent: 5310270 (1994-05-01), Matsukura
Patent Abstracts of Japan, vol. 13, No. 118 (3466). Mar. 23, 1989.

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