Guiding an elongate sheet of packaging material

Details Guiding an elongate sheet of packaging material Guiding an elongate sheet of packaging material

1977-02-09

1978-05-23

Coan, James F.

Advancing material of indeterminate length

By intermittent material-mover

Comprising material-moving roll

93 82, 93 94R, 226 21, B65H 2526

Patent

active

040904326

ABSTRACT:
A method of and apparatus for guiding an elongate sheet of packaging material towards a former which manipulates the sheet into a tube having its longitudinal edges slightly overlapped to enable them to be formed into a seam, the sheet being caused initially to drift sideways in one direction as it is drawn towards the former, a detector being provided for detecting when one longitudinal edge of the sheet has drifted to a first predetermined position, the sheet then being caused to drift sideways in the opposite direction until the said one longitudinal edge of the sheet has drifted to a second predetermined position after which the sheet is caused to drift sideways again in the said one direction.

REFERENCES:
patent: 2771252 (1956-11-01), Johnson
patent: 2777069 (1957-01-01), Saeman
patent: 3313461 (1967-04-01), Andersen
patent: 3380637 (1968-04-01), Knapp
patent: 3533542 (1970-10-01), Ziebolz et al.
patent: 3680446 (1972-08-01), James et al.

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