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. 09, 1997
Filed:
May. 02, 1996
K Trent Christensen, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A spacer apparatus for providing separation between a photoconductor drum and a charge roller in an electrophotographic printing system prior to first use includes a first and a second spacer member pivotally mounted to the shaft of the charge roller. Attached to the first and the second spacer members are, respectively, a first and a second spacer cam which contact the photoconductor drum in a region outside of the electrostatic latent image forming area of the photoconductor drum. Prior to the first rotation of the photoconductor drum, the first and second spacer cams maintain separation between the photoconductor drum and the charge roller. After the first rotation of the photoconductor drum, the first and second spacer cams rotate about the shaft of the charge roller and permit the charge roller to be engaged against the photoconductor drum by the compression springs.