Method for manufacturing thermoplastic resin racks
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United States of America Patent
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Aug 21, 1990
Grant Date -
N/A
app pub date -
Dec 27, 1988
filing date -
Feb 24, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rack of a thermoplastic resin is produced by heating a rod of a thermoplastic resin so that the temperature of at least the surface of said rod reaches a level within a range expressed by the equation, ##EQU1## (wherein T is a melting point of a resin forming a matrix for said rod), and thereafter forming a rack in one or both surfaces of said rod by a toothed roller and a grooved guide roller which are paired with each other, or a pair of opposed toothed rollers.
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