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:
Apr. 04, 1995
Filed:
Mar. 02, 1994
Gene F Day, Hillsborough, CA (US);
Phoenix Precision Graphics, Inc., Sunnyvale, CA (US);
Abstract
An electrostatic color printer or copier having a single toner applicator with a system for continuous toner purification. The single applicator is used for each color sequentially and as toning of one color is completed a volume of spent or contaminated toner fluid is left behind in the applicator. This volume is removed with clean wash fluid and sent to a wash fluid tank. Dirty wash fluid is continuously purified either before or after return to a wash fluid supply tank. In the latter case, the wash fluid supply becomes contaminated but is purified as wash fluid is withdrawn or while still in the tank. Continuous purification of dirty wash fluid allows a small volume purifier to be used without need for spent toner disposal.