Printer magnetic interference prevention system

Details Printer magnetic interference prevention system Printer magnetic interference prevention system

1979-07-12

1981-09-01

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101 9329, 101 9309, 361191, B41J 120

Patent

active

042865174

ABSTRACT:
A magnetic interference prevention system in a printer comprising a plurality of print hammers whose hammering surfaces are disposed in a straight line and a plurality of printing magnets arranged adjacent one another to drive each of the print hammers respectively. In this system when a signal to drive a first printing magnet for a column is provided the driving of at least one of two printing magnets adjacent to the first printing magnet is inhibited for a predetermined period of time. This will prevent three adjacent printing magnets from being driven substantially at the same time.

REFERENCES:
patent: 3633496 (1972-01-01), Kearns
patent: 3855923 (1974-12-01), Foley
patent: 3899968 (1975-08-01), McDevitt
patent: 3952648 (1976-04-01), Sery et al.
Blythe et al., IBM Tech. Discl. Bulletin, vol. 20, No. 4, Sep. 1977, pp. 1319-1320.
Gregory et al, IBM Tech. Discl. Bulletin, vol. 20, No. 1, Jun. 1977, pp. 90-95.

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