Wrapping steel pipes in a thermoplastic ribbon

Details Wrapping steel pipes in a thermoplastic ribbon Wrapping steel pipes in a thermoplastic ribbon

1982-02-19

1985-02-26

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156188, 15624413, 15624418, 156443, 156446, 156500, B29D 2304, B32B 3118, B32B 3130

Patent

active

045016321

ABSTRACT:
A thermoplastic hose is extruced, longitudinally, but in opposite (thinned) locations, and the resulting two semi-circular sheets are flattened, superimposed with an offset, and wrapped around a rotating and axially advanced pipe. The hose may be extruded from above or from the side. The method and apparatus is applicable also for high-density PE (e.g., 0.95).

REFERENCES:
patent: 3616006 (1971-10-01), Landgraf et al.
patent: 3758370 (1973-09-01), Sakurai et al.
patent: 3972761 (1976-08-01), Landgraf et al.
patent: 4130453 (1978-12-01), Hollister
patent: 4178200 (1979-12-01), Hakert et al.
patent: 4211595 (1980-07-01), Semour

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