Phasing control system for web having variable repeat length por

Details Phasing control system for web having variable repeat length por Phasing control system for web having variable repeat length por

1986-10-27

1988-11-01

Gilreath, Stanley N.

Advancing material of indeterminate length

With material-responsive control means

To regulate longitudinal movement of material

83 74, 83 76, 226 29, B65H 2304, B26D 534

Patent

active

047813172

ABSTRACT:
A method and apparatus for controlling the phasing of repeat length portions of a moving web to an operating machine along the web including method and apparatus for measuring instantaneous phasing error between web portions being operated on and the operating machine; method and apparatus for measuring repeat length error in web portions upstream of the operating station; method and apparatus for determining the total distance by which a web portion is out of phase with the operating machine before the web portion is operated on by the operating machine, method and apparatus for adjusting the movement of a web portion relative the movement of the operating machine during the last repeat length of web travel of the web portion before it is operated on by the operating machine; and method and apparatus for monitoring and correcting the phasing adjustment response.

REFERENCES:
patent: 3397634 (1968-08-01), Betts et al.
patent: 3556509 (1971-01-01), Crum
patent: 3559568 (1971-02-01), Stanley
patent: 3601587 (1971-08-01), Thiede
patent: 3774016 (1973-11-01), Sterns et al.
patent: 3802306 (1974-04-01), Brown et al.
patent: 4618391 (1986-10-01), Torti et al.

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