Apparatus for making laminated thermoplastic film

Details Apparatus for making laminated thermoplastic film Apparatus for making laminated thermoplastic film

1973-12-03

1976-05-18

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With casting, plastic molding, or extruding means

156244, 264 95, 264172, 264173, 264176R, 425114, 4251331, B29F 308

Patent

active

039575667

ABSTRACT:
Several thermoplastic tubes to be bonded to one another are jointly extruded through concentric annular orifices while cool air is blown from annular Venturi nozzles in concentric streams past the outer surface of the outermost tube and past the inner surface of the innermost tube to accelerate their solidification. The inter-tube space or spaces can be inflated by similar air streams blown at least in part along their confronting tube surfaces. The return of the injected air from the innermost and inter-tube spaces takes place through conduits disposed midway between the nozzles.

REFERENCES:
patent: 2753596 (1956-07-01), Bailey
patent: 3541191 (1970-11-01), Thordarson
patent: 3758354 (1973-09-01), Sakurai et al.

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