Method for forming containers with fin-type seams

Details Method for forming containers with fin-type seams Method for forming containers with fin-type seams

1974-11-04

1976-01-27

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

53 46, 93 82, 156466, B29D 2310

Patent

active

039350487

ABSTRACT:
A conventional fin-type seam formed on tubed bag forming sheet material provided on one face with heat sealable material, has heat sealed overlapping edge portions forming the seam. The fin slides over a back-up plate extending between it and the body of the tube to prevent scuffing of the heat sealable material with consequent seal failure. A tracking wheel engaging the fin presses it against the back-up plate, and maintains alignment.

REFERENCES:
patent: 2277288 (1942-03-01), Berch
patent: 2385897 (1945-10-01), Waters
patent: 3399094 (1968-08-01), Skoggard et al.
patent: 3816043 (1974-06-01), Snelling et al.

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