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
Gateway channel utilization
Synergistic fungicidal interactions of 5-fluorocytosine and other fungicides
Memory device, test operation method thereof, and system including the same
Random sampling for geophysical acquisitions
Method and apparatus for providing auto-completion of information
Method for producing a sulfonated polyarylether block copolymer
Method and apparatus for controlling a multi-node process
  Randomly Featured Patents
System and method for providing visual and physiological cues in a security matching system
Flow rate measuring device, and gas supply system employing it, method for specifying gas appliance
Anti-falling device with rapid introduction and withdrawal of the cord in any position of this latter
Cryogenic liquid oxidizer cooled high energy system
Compact high efficiency clam shell heat exchanger
Disk apparatus having an improved cooling structure
Pattern counting system using line scanning
Article for growing cultures in a body cavity in the presence of gas, and package for the article
Flexible recipe modeling and recipe cluster management system
Power delivery circuit with current detection