Apparatus for manufacturing cylindrical tubes

Details Apparatus for manufacturing cylindrical tubes Apparatus for manufacturing cylindrical tubes

1977-10-04

1980-04-01

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Longitudinally progressive helical winding means

156498, B65H 8100

Patent

active

041960378

ABSTRACT:
Apparatus for manufacturing cylindrical tubes from paper or similar fibrous materials. A layer of plastics material which becomes tacky when heated provided on a paper web is heated through the paper web then pressed against a plastics foil web with one edge of the plastics foil web extending beyond the corresponding edge of the paper web. The joined webs are wound helically onto a mandril with the extended edge of the plastics foil web overlapping a corresponding opposite second edge of the plastics foil web. A string of molten adhesive is applied along the extended edge on the mandril. The mandril is cooled to maintain the foil layer nearest the mandril below its melting temperature.

REFERENCES:
patent: 3125478 (1964-03-01), Pratt
patent: 3400029 (1968-09-01), Mesrobian et al.
patent: 3406614 (1968-10-01), Martin
patent: 3563826 (1971-02-01), O'Neal, Jr.
patent: 3988190 (1976-10-01), McWilliams
patent: 4010054 (1977-03-01), Bradt
patent: 4087299 (1978-05-01), Berg

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