Printer carriage bushing

Details Printer carriage bushing Printer carriage bushing

1992-10-23

1994-09-13

Burr, Edgar S.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage, per se, or guideway therefor

400352, B41J 1122

Patent

active

053463200

ABSTRACT:
A dimensionally stable bushing assembly for a printer carriage 10 uses a bushing liner 20 constructed of a relatively flexible and dimensionally non-stable lubricous material which is afforded dimensional stability by an interference fit of the exterior wall of the liner 20 with the interior wall 15, 17 of apertures 14, 16 in the carriage which are manufactured to the desired degree of dimensional tolerance. In the preferred embodiment, the printer carriage 10 is made of polycarbonate which slides on stainless steel slider rods. The bushing liners are preferably a molded mixture of from 25-35 percent carbon, 15-25 percent teflon and 45-55 percent nylon. Although such mixtures typically shrink during the molding process, it is necessary, due to the special open or C-shaped configuration of the liners, only to maintain a close control on the thickness of the molded liners 20 rather than carefully controlling both thickness as well as their peripheral dimension.

REFERENCES:
patent: 674625 (1901-05-01), Clay
patent: 4468144 (1984-08-01), McMahon et al.
patent: 4620805 (1986-11-01), Belanger
patent: 4772899 (1988-09-01), Mamiya et al.
patent: 4898487 (1990-02-01), Brull et al.

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