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:
Aug. 02, 1994
Filed:
May. 20, 1993
Arthur E Bliss, Sunnyvale, CA (US);
Phoenix Precision Graphics, Inc., Sunnyvale, CA (US);
Abstract
A toning method for electrostatic printers and copiers where paper is wound on a supply roll and moved toward a takeup roll. After a latent image of a first color is written and the image area is wound toward a takeup roll, toner of a first color is applied while rewinding the image bearing web toward the supply roll. After the image area passes the writing head, the web is stopped and reversed so that a latent image corresponding to a second color may be written. Once the image region passes toning stations, the web is stopped and again reversed. During reverse direction travel of the image region, toner of a second color is applied and the image region is again wound on the supply roll. The process continues for toning all colors during the rewind operation. Although the image area may move at variable speeds during image writing, the image area is moved at constant speed in the reverse direction for toning. Motion at constant speed allows higher quality toners to be used, leading to improvement in color saturation and hue.