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:
Jan. 25, 2000
Filed:
Jan. 19, 1999
Edward B Caruthers, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Changes in toner developability of toners in a liquid toner system are determined and compensated for by sensing the toner concentration and liquid toner volume in a tank, based on changes in the toner concentration and toner mass in the tank. Based on the foreground areas for a color separation layer corresponding to a particular toner, the developed area for that toner for one or more printed pages can be determined. From the developed area and the consumed mass of toner, a developed mass per unit area (DMA) can be determined. Based on the determined DMA, the sensed toner concentration and a voltage differential, the developability of the toner can be determined. Based on a target DMA, the sensed toner concentration and the determined developability of the toner, a new voltage differential can be determined. If the new voltage differential is within a determined range, a target toner concentration is updated based on the target DMA, the determined developability and a target voltage differential for that toner. Based on the updated target toner concentration, toner and/or liquid carrier material can be added to the tank for that toner to change the sensed toner concentration to the updated target toner concentration. In multi-component toners, this method is used to determine the developability of each component. Based on the developability and target DMA of each component of a multi-component toner, new target concentrations of each toner component are determined. Accordingly, the developability of single- and multi-component toner can be corrected for.