Method and apparatus for making post-tensioning tendons for conc

Details Method and apparatus for making post-tensioning tendons for conc Method and apparatus for making post-tensioning tendons for conc

1984-10-22

1986-11-18

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

15624421, 264568, 264173, 264174, 425 71, 425112, 425113, B29C 4702

Patent

active

046235043

ABSTRACT:
A method of making a tendon suitable for use in the post-tensioning of concrete as well as for other applications is disclosed. The method comprises the steps of coating a wire or a multiple-wire strand with a thin coat of a corrosion inhibitor. In the preferred embodiment, the thin coat may be more easily applied by coating the wire or multiple-wire strand with a thick coating of corrosion inhibitor and then removing the surplus amount of the corrosion inhibitor from the outer periphery of the strand, including the interstices, to leave the desired thin coat. A seamless plastic jacket is then formed around the wire or the multiple-wire strand while simultaneously creating a differential pressure across the wall of the seamless plastic jacket to provide a loosely fitting seamless plastic jacket.

REFERENCES:
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patent: 4085183 (1978-04-01), Roe
patent: 4290841 (1981-09-01), Fukuhara
patent: 4435348 (1984-03-01), Standley

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