Print head

Details Print head Print head

1989-06-09

1990-04-10

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 310

Patent

active

049155172

ABSTRACT:
A print head for the print wire impact type dot matrix printer, including means for producing a gas flow into a sealed print head housing and through tubular linear bearings of an end guide to prevent migration of ribbon ink into the bearings and the housing. Sufficient gas pressure is provided to create gas bearings for each print wire to reduce friction between the reciprocally moving print wire and the end guide for superior performance and to lessen wear on both the print wire and the guide. Gas flow to create gas bearings in internal guides is also provided.

REFERENCES:
patent: 4044668 (1977-08-01), Barrus et al.
patent: 4571101 (1986-02-01), Sakaida et al.
patent: 4699051 (1987-10-01), Jezbera

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