Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for improved retention copying










Image Number 5 for United States Patent #4531827.

A method of producing multiple copies of an original document with a minimum number of document imaging scannings includes impressing an electrostatic image of a reference density patch on the charge receptor together with an image of the document, detecting the potential of the patch, comparing the detected potential with a reference level, and controlling further copy production in accordance with the results of such comparison, so that additional copies are produced from the electrostatic image of the document without reimaging until the detected potential of the patch image drops below the reference level, at which time the patch and document are reimaged to form new electrostatic images of the patch and document on the charge receptor for the production of additional copies.








 
 
  Recently Added Patents
Terminal device, system and computer readable medium
Generating wiki pages from content and transformation objects
Television with a stand
Method, apparatus, and system for synchronizing contents
Carbonyl-ene functionalized polyolefins
Determination of copy number variations using binomial probability calculations
Automatic baroreflex modulation responsive to adverse event
  Randomly Featured Patents
Supported catalyst for demetalation and desulfurization of hydrocarbon oils
Hinge block for the arm-rest of a wheelchair for the handicapped, and a corresponding wheelchair
Dynamic random access memory controller with multiple independent control channels
Process for preparing dilute aqueous copper zirconium ammonium carbonate solutions containing less than about 0.5% Cu and 1.5% ZrO.sub.2
Facilitating performance analysis for processing
Method for producing a metallized image on a sheet material and device for carrying out said method
Detonation system and method
Personal voice portal service
Method and system for enhancing transmission reliability of video information over wireless channels
STI measuring