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:
May. 28, 1996
Filed:
May. 25, 1995
Kristina J Barnes, Boise, ID (US);
John A Thompson, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A foam roller cleaning system for removing excess toner and carrier in an LEP printer includes a foam roller, having a reduced outer foam layer thickness, that is retractably engagable with an adjacent wringer bar for selective yet complete compression of the foam roller. The outer foam layer thickness is reduced to limit the volume of toner that can accumulate in the foam and, consequently, to reduce the build-up of toner solids therein. The complete compression of the outer foam layer by the wringer bar ensures removal of substantially all toner from the foam to prevent toner solids build-up and to improve cleaning of the foam. The retractable engagement of the foam roller with the wringer bar prevents compression set in the foam roller for improved cleaning of the developer and rigidizing/squeegee rollers and improved useful life of the foam roller.