Observation of moving webs

Details Observation of moving webs Observation of moving webs

1974-10-07

1976-08-31

Coan, James F.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

93 80, 156193, B31C 300

Patent

active

039773094

ABSTRACT:
A method for observing a moving web having printed thereon a regularly repeated pattern and control features along the web, comprising mounting two photoelectric cells a fixed distance apart in the direction of movement of the web, the photoelectric cells being adapted simultaneously to scan identical data in different locations on said web, the cells being connected in an electrical circuit which is balanced when they observe identical data and which produces an output when they observe non-identical data due to one cell but not the other observing a control feature.

REFERENCES:
patent: 3150575 (1964-09-01), Couzens et al.
patent: 3330186 (1967-07-01), Glasby et al.
patent: 3664239 (1972-05-01), Woelbel

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