Method for detecting the position of a web supply roll and for p

Details Method for detecting the position of a web supply roll and for p Method for detecting the position of a web supply roll and for p

1997-12-18

1999-12-28

Nguyen, John Q.

Winding, tensioning, or guiding

Unwinding

With detector, indicator, or control

242559, B65H 2600, B65H 1900

Patent

active

06007017&

ABSTRACT:
In a method for detecting the position of a web supply roll, the actual lateral positions of the two lateral faces of the web roll are detected and are compared with reference values. The differences between the actual and the reference values are used to shift the web supply roll laterally until the actual values are the same as the reference values.

REFERENCES:
patent: 4131206 (1978-12-01), Kawada et al.
patent: 4586673 (1986-05-01), Tokuno et al.
patent: 4773609 (1988-09-01), Steffen
patent: 4919353 (1990-04-01), Isowa

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