Process and apparatus for forming a multilayer tube

Details Process and apparatus for forming a multilayer tube Process and apparatus for forming a multilayer tube

1985-05-31

1987-02-24

Simmons, David

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

138144, 138145, 138150, 156195, B32B 3100

Patent

active

046455531

ABSTRACT:
Process for manufacturing a calibrated cardboard tube having minimal surface roughness and dimensional stability, involving helically winding a plurality of glued strips or plies around a mandrel and then polishing the exterior surface of the rough tube, coating the exterior surface with a thermosetting resin, cutting the tube, drying and compressing the cut pieces transversely together with applying heat, wherein at least the next-to-last ply and the last ply or strips of a dense material are impregnated with a thermosetting resin and, after coating and heat compression of the pieces, a final coating of a thermosetting resin is applied to the last plies before drying the coated surface and buffing or finish polishing to form a smooth surface, and the apparatus for performing the process.

REFERENCES:
patent: 2751936 (1956-06-01), Dunlap et al.
patent: 2785700 (1957-03-01), Yovanovich
patent: 3002433 (1961-10-01), Dunlap
patent: 3170489 (1965-02-01), Cunningham
patent: 3300159 (1967-01-01), Johnson et al.
patent: 3430543 (1969-03-01), Cunningham
patent: 3451433 (1969-06-01), Cunningham
patent: 3457130 (1969-07-01), Morrison
patent: 3545494 (1970-12-01), Cunningham
patent: 3813026 (1974-05-01), Biancamaria

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