Web registration system and method

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...

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493 22, 493 24, 493 29, 493239, 83 75, 83209, 83371, 83365, 226 27, 226 32, B31B 102

Patent

active

054703000

ABSTRACT:
A system and method in the manufacture of plastic bags for accurately registering a web having graphic material printed repetitively thereon with respect to a transverse cutting and sealing device comprise detecting the passage of an eyemark printed on the web by a certain location at an initial part of a web index, calculating the initial length travelled by the web from the start of the web index to the detection of the eyemark, and then adjusting a predetermined draw length of the web based upon that calculated initial length.

REFERENCES:
patent: 4781317 (1988-11-01), Ditto
patent: 5000725 (1991-03-01), Bauknecht
patent: 5041070 (1991-08-01), Blaser
"Photoelectric Register Controls"-by Allan Lytel of General Electric, pp. 38, 39, (Jan. 1960).

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