Diagnostics for color printer on-line spectrophotometer control system

US6639669B2 · kind B2 · utility

Assignee

• Xerox Corporation · US

Inventors

• Fred F. Hubble, III · Rochester, US
• Tonya L. Love · Rochester, US
• Lalit Keshav Mestha · Fairport, US
• Gary W. Skinner · Rochester, US
• Dennis M. Diehl · Penfield, US
• Robert E. Grace · Fairport, US
• Eric Jackson · Webster, US
• Yao Rong Wang · Webster, US

Key dates

• Filing date: Sep 10, 2001
• Grant date: Oct 28, 2003
• Expiry date: Jan 28, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J3/524
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a color analysis method in which sheets with multiple different color printed test patches are moved relative to a color analyzing spectrophotometer, and in which fiducial marks are printed adjacent to respective test patches and optically detected by a fiducial mark detector to provide a triggering system for the respective test patch analysis, there is provided automatic diagnostic testing of the spectrophotometer and the fiducial mark triggering system, including automatically generating special test sheets, some of which may include test areas of varying density black.