The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 1994
Filed:
Oct. 23, 1992
Michael A Nguyen, Singapore, SG;
Hewlett-Packard Company, Palo Alto, CA (US);
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.