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
Predicting popularity of electronic publications
Method for assisting in the checking of transaction records, transaction device, server, mobile terminal, and corresponding computer programs
O-space imaging: highly efficient parallel imaging using complementary nonlinear encoding gradient fields and receive coil geometries
Systems and methods for facilitating communication with foundation fieldbus linking devices
Drive apparatus
Optimized control of an energy supplying system and an energy consuming system
Managing personal information on a network
  Randomly Featured Patents
Remote control switch for posture adjustment of automotive mirrors
Gas discharge display tube with barrier means for prevention of ion scattering
Device for information storage using field emission
Composition for improving adherence of fat-based coatings to frozen fat-based confections
Rotating cage security device for a gyratory projectile
Time estimator for object oriented software development
Input/output pads placement for a smart card chip
Externally adjustable liquid interface for a centrifugal separator
Papermaking felt with hydrophobic layer
Diesel fuel injection pump with solenoid controlled low-bounce valve