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. 23, 2003
Filed:
Jul. 03, 2001
Dariush Aboonasry, Lexington, KY (US);
Christopher Alan Adkins, Lexington, KY (US);
Alexander Lloyd Chapman, Lexington, KY (US);
Darell Dean Cronch, Georgetown, KY (US);
David Michael Cseledy, Lexington, KY (US);
Edmund Hulin James, III, Lexington, KY (US);
Michael Anthony Marra, III, Lexington, KY (US);
Barry Baxter Stout, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
An encoder including a light source for emitting light, a photodetector for detecting at least part of the light emitted by the light source, and an encoder film including a plurality of alternating bars and windows and being located between the light source and the photodetector. The encoder includes a mask including a plurality of alternating bars and windows, the mask being located between the light source and the photodetector. The encoder further includes a spacer located between the mask and the encoder film, the encoder film contacting the spacer to maintain a predetermined spacing between the mask and the encoder film.