Optical Method for Detecting Photoconductor Panel Increment in Copier/Printer
Original Publication Date: 1985-May-01
Included in the Prior Art Database: 2005-Feb-18
This article relates to an electrophotographic copier/printer machine with an incrementing drum and describes the control for the advance of a photoconductor (PC) from a supply reel to a take-up reel, in order to place a new panel of photoconductor on the surface of the drum. The advance of the photoconductor is determined by detecting the change in reflectance between a new and used PC. The flowchart in Fig. 2 depicts the sequence of events in measuring the PC. Sensing of the trailing edge of a PC panel is optional but allows early detection of failure by the PC advance mechanism. Fig. 1 shows a typical electrophotographic copier/printer machine. A charge corona 10 places a relatively uniform charge on a photoconductor surface carried by the rotating drum 11.