Intermittent seal sensing apparatus and methods for pouch webs

Details Intermittent seal sensing apparatus and methods for pouch webs Intermittent seal sensing apparatus and methods for pouch webs

1992-10-30

1994-05-31

Coan, James F.

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53 67, 53455, 53562, 493 9, B65B 5702, B65B 6106

Patent

active

053158075

ABSTRACT:
A vacuum means for detecting transverse seal areas dividing unsealed areas in adjacent plies of a moving, multiple ply web includes vacuum ports defining a gap through which the web moves. Unsealed web areas are sucked against the ports. When a sealed area enters the gap, it is sucked to one or the other port, uncovering the opposite port. The ensuing pressure differential is sensed to indicate a seal entering or passing the gap. Seal signals are produced and used to control accurate cutting at the seals to separate the web into individual pouches. Control and circuitry apparatus and methods are disclosed.

REFERENCES:
patent: 3453799 (1969-07-01), Cloud et al.
patent: 3481099 (1969-12-01), Clancy
patent: 3680446 (1972-08-01), James et al.
patent: 3782069 (1974-01-01), Fischbein et al.
patent: 3782252 (1974-01-01), Kozlowski et al.
patent: 3802051 (1974-04-01), Andler et al.

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