Apparatus and method for fabricating a flexible cylinder from mu

Details Apparatus and method for fabricating a flexible cylinder from mu Apparatus and method for fabricating a flexible cylinder from mu

1979-12-12

1982-01-12

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156272, 156446, 156456, 156458, 1563797, 219 1053, 493304, 493306, B31C 100

Patent

active

043103693

ABSTRACT:
An apparatus for fabricating a flexible cylinder from multi-ply flexible web material has a cylindrical forming cavity with a longitudinal opening through which the flexible web material is fed into the cavity. A non-metallic cylindrical mandrel, about which the flexible web material is fed, is mounted along the central axis of the cavity. The diameter of the mandrel is less than the diameter of the cavity in which it is disposed by an amount greater than the thickness of the web material. The web material is fed loosely around the mandrel by a feed roller to form a flexible cylinder having an internal diameter greater than the diameter of the mandrel and an outer diameter less than the internal diameter of the cavity. The amount of web material fed is enough to form a narrow longitudinal overlap zone which is heat sealed to form a longitudinal seal.
A seam presser holds the overlap seam during sealing and subsequent cooling. Finally the finished cylinder is slid from the mandrel and thereby removed from the cavity.

REFERENCES:
patent: 2403995 (1946-07-01), Peters
patent: 2697387 (1954-12-01), Falconer
patent: 3252388 (1966-05-01), Schur
patent: 3510378 (1970-05-01), Kramer
patent: 3567546 (1971-03-01), Morris et al.
patent: 3604609 (1972-09-01), Kennedy
patent: 3730393 (1973-05-01), Ledewitz et al.
patent: 3959066 (1976-05-01), Miller et al.
patent: 4200482 (1980-04-01), Magerle

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