Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Bi-directional registration of servo indexed webs










Image Number 3 for United States Patent #5000725.

A bag machine fabricates plastic bags by transversely cutting and sealing, at regularly spaced preselected locations, an elongate plastic web having graphic material repetitively printed thereon. In operation, the bag machine advances the web by a calculated draw length, and an optical sensor, sensitive to the passage of eyemarks printed in regularly spaced locations on the web, functions to ensure that the web is cut and sealed only at the desired locations. To avoid inaccuracies resulting from a gradual variance between the nominal draw length and the actual distance between eyemarks, a control system monitors the actual distance between eyemarks and sets the nominal draw length to the average actual spacing between eyemarks as measured over a preselected number of successive eyemarks.








 
 
  Recently Added Patents
Recombinant vectors for use in position-independent transgene expression within chromatin
Information processing apparatus and storage medium for storing information processing program
Fabrication of high gradient insulators by stack compression
Reovirus for the treatment of cellular proliferative disorders
Anti-infective derivatives, method for the production thereof, pharmaceutical compositions containing same and uses of said derivatives in treatment
Temporal document trainer and method
Tuning peg for a stringed instrument
  Randomly Featured Patents
Racket having thickened shaft portion
Rotating anode x-ray tube capable of efficiently discharging intense heat
Intubation device
Damper device for precision assembling robot
Method and system for handling telecommunications data traffic
Mold apparatus for forming polymer and method
Compact display assembly
Sleeping infant positioning device
Catalytic reactions
Dynamic leak control for system with working fluid