Method of making lengths of flexible insulated air duct with end

Details Method of making lengths of flexible insulated air duct with end Method of making lengths of flexible insulated air duct with end

1982-06-30

1983-08-23

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

138121, 138129, 138149, 156184, 156187, 156294, 156443, 156446, B65H 8100

Patent

active

044002289

ABSTRACT:
A tubular jacket of flexible plastic film is telescoped over one of two spaced coaxial mandrels extending toward each other, duct end collars are secured respectively on the mandrels, opposite ends of a flexible helically reinforced core are strapped respectively to the collars, a flexible insulation blanket is wrapped around the core and taped adjacent opposite ends, the jacket is pulled over the blanket, the collars are released, and the collared duct is removed from the mandrels.

REFERENCES:
patent: 3240643 (1966-03-01), Schroeder et al.
patent: 3538956 (1970-11-01), Helbing
patent: 3709751 (1973-01-01), Carlson et al.
patent: 3817804 (1974-06-01), Helmick et al.

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