Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Variable magnification copying apparatus and automatic shutdown therefor










Image Number 12 for United States Patent #5008712.

This invention relates to a copying apparatus with variable magnification capability, wherein the reduced and enlarged copying operations are achieved by varying the speed of a photosensitive drum, while controlling an optical system. The size of a copying material is compared with the size of a reproduced image at a selected magnification, and the comparison is displayed. Also, the size of copy material and the selected magnification can be changed during an interrupt process, and the scanning stroke and timing for image formation are controlled differently for different magnifications. The size of a copying material is compared with the size of a reproduced image at a selected magnification, and the comparison is displayed. Also, the size of copy material and the selected magnification can be changed during an interrupt process, and the scanning stroke and timing for image formation are controlled differently for different magnifications. the optical system is moved to a determined position for a selected magnification and an error signal is generated when the optical system does not arrive at the determined position within a predetermined time after the selected magnification is input by the operator. The image forming cycle is stopped or inhibited in response to generation of the error signal.








 
 
  Recently Added Patents
Image output method and device, and image display
Automatic engine oil life determination with a factor for oil quality
Automated gate system
Housekeeping cart
Control device with adjusting pulse width modulation function and the backlight module thereof
Low offset, fast response voltage controlled current source and controlling method thereof
System and method for infrared dongle
  Randomly Featured Patents
Balance system for sash window assembly
Systems and methods for providing remote ordering
Training apparatus for cyclist and for physical exercise
Paw covers
VLAN trunking over ATM PVCs (VTAP)
Method for producing organic agent coated with powders of coating agent
Exercise aid
Method and apparatus for gas feed control in a dry etching process
TV lens with still-taking function
Polynucleotide encoding a human receptor tyrosine kinase