Print hammer bank in modular design

Details Print hammer bank in modular design Print hammer bank in modular design

1985-09-04

1987-03-24

Burr, Edgar S.

Printing

Selective or progressive

Bed and platen machines

101 9329, 335256, 335267, 335268, B41J 910

Patent

active

046516409

ABSTRACT:
The invention relates to a print hammer bank of electromagnetic print hammer actuators in modular design of the type which includes a plurality of actuators each of which comprises a stator formed in two halves, each half including an electromagnet and a plurality of pole pieces, and means for positioning the stator halves relative to each other so that the ends of the pole pieces of the two halves are spaced apart in pairs so as to form a plurality of aligned operating gaps. The armature elements are designed so that the volume of each armature element is of the order of the volume of the associated operating gap.
A print hammer bank in accordance with the invention is characterized in that the print hammer bank consists of two spaced apart rows of modules of the same geometrical shape and design forming the stator halves with the armature members located side by side in the space between the rows of modules, in that, for adjacent print hammers, the associated electromagnets are staggered relative to each other within the associated module, and in that each module, looking at the side facing the armature members, is shaped like a parallelogram.

REFERENCES:
patent: 3183417 (1965-05-01), Wright
patent: 3209891 (1965-10-01), Littwin
patent: 3800257 (1974-03-01), Schmitt
patent: 3890587 (1975-06-01), Field
patent: 4371857 (1983-02-01), Bohg et al.
patent: 4377799 (1983-03-01), Froment
patent: 4425845 (1984-01-01), Bohg et al.
Tech. Disclosure Bulletin--Horizontal Sliding Print Hammer Mechanism Apr. 1983, vol. 25, No. 11B-W. A. Patterson and W. D. Thorne.

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