Method for guiding a moving web of material

Details Method for guiding a moving web of material Method for guiding a moving web of material

1987-05-04

1989-07-18

Levy, Stuart S.

Advancing material of indeterminate length

With material-responsive control means

To position material laterally

226 20, 226 21, B65H 2302

Patent

active

048486329

ABSTRACT:
The invention relates to a method of guiding a web of paper or foil material in a web-guiding device, such web having print marks applied to it at least over stretches of the web, as well as to such a web-guiding device with a correcting device, the latter being adjustable when the center of the web runs off course and with a controlling system connected to an edge-sensing system, whereby the position of the print marks relative to an imaginary guide line is controllable over stretches of the web carrying print marks, and additional correction relating to the latter can be made, if required. According to the invention, print marks signals are produced by means of a print mark sensor and linked with the correction signals of the edge-sensing system, with priority of the print mark signals.

REFERENCES:
patent: 2961548 (1960-11-01), Prell
patent: 3567091 (1971-03-01), Woolard
patent: 3682362 (1972-08-01), Ott, Jr.
patent: 3752377 (1973-08-01), Knapp
patent: 4135664 (1979-01-01), Resh
patent: 4470555 (1984-09-01), Lawson

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