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
Organic light emitting diode light source device
Managing job execution
Image forming apparatus
Rotating-body electrification mechanism, image carrier unit, process cartridge, image forming apparatus, and method for electrifying image carrier unit
System and method for providing a path avoidance feature in a network environment
Method and apparatus for performing real time anomaly detection
Pressure-applying member, fixing device, and image forming apparatus
  Randomly Featured Patents
Database network system
Cam mechanism
Drag-type spreading apparatus for road construction mixtures
Regulating an oxidizer in an electrochemical cell pumping system
Optical transceiver for 40 gigabit/second transmission
Broadband data reception system for WorldNet.TM. access
Service level agreements based on objective voice quality testing for voice over IP (VOIP) networks
Furnace for firing dental ceramic material
Disc player
Method of preparing olefinic siloxane by GLC