Apparatus for driving dotting hammers of a matrix printer

Details Apparatus for driving dotting hammers of a matrix printer Apparatus for driving dotting hammers of a matrix printer

1976-09-17

1978-03-28

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

197 1R, 101 9309, B41J 770

Patent

active

040808920

ABSTRACT:
Apparatus is described for driving dotting hammers of a matrix printer consisting of a number of electro-magnets mounted in parallel at one side of the printing paper and at the other side of the paper, a number of electro-magnetic plates mounted in parallel to be attracted to said electro-magnets, wherein each plate has a dotting hammer for printing on the paper and wherein the electro-magnetic plates are driven for printing by the magnetic field of the electro-magnets passing through the printing paper. Letter printing on the printing paper is accomplished by dotting. The pitch or spacing arrangement of the paralleled electro-magnets is preferably half of the pitch arrangement of the electro-magnetic plates to be attached.

REFERENCES:
patent: 2930847 (1960-03-01), Metzger
patent: 3281853 (1966-10-01), Madeira et al.
patent: 3715978 (1973-02-01), Raider
patent: 3782278 (1974-01-01), Barnett et al.
patent: 3797387 (1974-03-01), Decker et al.
patent: 3941051 (1976-03-01), Barrus et al.
IBM Tech. Disclosure Bulletin, Dowd, Sept. 1974, vol. 17, No. 4, p. 1012-1013.

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