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
Low voltage sensing scheme having reduced active power down standby current
Method and node for generating distributed Rivest Shamir Adleman signature in ad-hoc network
Delivery system for radiation therapy
LED lamp module
Thermoplastic composition having low gloss and low temperature impact performance
Assemblies for identifying a power injectable access port
Production of renewable diesel by pyrolysis and esterification
  Randomly Featured Patents
Stacker
Friction reducers for fluids comprising carbon dioxide and methods of using friction reducers in fluids comprising carbon dioxide
Spatio-temporal pattern recognition using a spiking neural network and processing thereof on a portable and/or distributed computer
Fluorosilicone coatings
Heat exchanger for cooling solid substance-containing gas
Sandmill vessel with inlet diffuser and removeable outlet filter
Method for making a design layout of a semiconductor integrated circuit
Cabinet
Lighter cover
Organizer kit