Winding tape and method of making winding tape

Details Winding tape and method of making winding tape Winding tape and method of making winding tape

2007-02-27

2007-02-27

Hess, B. Hamilton (Department: 1774)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S210200, C264S211200, C428S411100, C428S421000

Reexamination Certificate

active

10345300

ABSTRACT:
In a method for manufacturing a winding tape (10) of unsintered polytetrafluoroethylene wherein polytetrafluoroethylene powder is mixed with a lubricating or slip agent, the material is molded into a cylindrical blank (1) and the blank (1) is first extruded as a strand with small outer dimensions and subsequently calendered into the tape (10) in the forming gap (13) of a pair of rolls (8,9). The surface of at least one roll is deformed under compression during calendering of the round rope (6) into the tape.

REFERENCES:
patent: 3940081 (1976-02-01), Kubicki, Sr.
patent: 4791966 (1988-12-01), Eilentropp
patent: 5772884 (1998-06-01), Tanaka et al.
patent: 6117556 (2000-09-01), Tamaru et al.
patent: 562 098 (1975-04-01), None

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