Process for producing a tubular casing

Details Process for producing a tubular casing Process for producing a tubular casing

1985-04-03

1987-02-17

Simmons, David

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156257, 264130, B31D 304

Patent

active

046437886

ABSTRACT:
A process for producing a tubular casing by folding a flat plastic sheet (1) into a tubular structure by a shaping former (6) as the sheet advances, and joining the meeting edges of the folded sheet to form the tubular casing, characterized by forming grooves (13) on one or both sides of the sheet along fold lines, coating a surfactant (12) on the sheet surface at least at the fold line portions of the sheet surface which are to be brought into contact with the shaping former, and then folding the sheet into a tubular structure by the shaping former.

REFERENCES:
patent: 2041974 (1936-05-01), Sloan
patent: 2244282 (1941-06-01), Bergstein
patent: 2900881 (1959-08-01), Barnes et al.
patent: 4242161 (1980-12-01), Hulten et al.

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