Manufacturing container or tube from paper; or other manufacturi – Control means energized in response to activator stimulated... – Responsive to work material – the product or means engaging...
Patent
1993-03-19
1995-10-17
Lavinder, Jack W.
Manufacturing container or tube from paper; or other manufacturi
Control means energized in response to activator stimulated...
Responsive to work material, the product or means engaging...
493 22, 493 24, 493 29, 226 32, 364469, 36447409, B31B 108
Patent
active
RE0350672
ABSTRACT:
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 preselectd number of successive eyemarks.
REFERENCES:
patent: 3375961 (1968-04-01), Flick
patent: 3713571 (1973-01-01), Simonton
patent: 4737904 (1988-04-01), Ominato
patent: 4781317 (1988-11-01), Ditto
patent: 4782987 (1988-11-01), Giacomelli
patent: 5041070 (1991-08-01), Blaser
FMC Corporation
Lavinder Jack W.
Low Warren N.
Rudy Douglas W.
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