Hammer assembly for printers

Details Hammer assembly for printers Hammer assembly for printers

1985-07-12

1986-06-17

Pearson, Charles A.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by movement of record-medium against type-face

101 9334, 101 9348, B41J 906, B41J 938

Patent

active

045953040

ABSTRACT:
A plunger type electromagnetic hammer assembly for use with a printer including a hammer housing having a magnetic flux emitting surface. The hammer assembly includes a hammer slidably situated in the housing wherein the hammer includes a plunger portion having a first radius and a head portion having a second radius. The plunger portion and the head portion are coupled by a neck portion having a third radius, the third radius being less than the first radius and than the second radius. The plunger, neck and head portions are coaxially oriented. A biasing structure biases the hammer away from the platen. A magnetic flux on the magnetic flux emitting surface causes the hammer to slide toward the platen.

REFERENCES:
patent: 1361935 (1920-12-01), Villiers
patent: 4422784 (1983-12-01), Arzoumanian et al.

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