Method of heating thermal shrinkage tube and apparatus therefor

Details Method of heating thermal shrinkage tube and apparatus therefor Method of heating thermal shrinkage tube and apparatus therefor

1983-06-03

1985-07-02

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Reshaping or treatment of an optical preform

264 15, 264 25, 264230, 264327, 264DIG46, 425143, 4251744, B29C 2720

Patent

active

045267324

ABSTRACT:
A heating apparatus for thermally shrinkable tubes and the like has a heating density gradient such that a higher temperature is imparted initially to a central portion of the heated tube, spreading gradually to the ends of the tube, to purge air bubbles to the outside of the tube while employing only one heating element.

REFERENCES:
patent: 2452197 (1948-10-01), Kennedy
patent: 2695853 (1954-11-01), Foreit
patent: 3423500 (1969-01-01), Gregory
patent: 3470046 (1969-09-01), Verdin
patent: 3761550 (1975-09-01), Seefluth
patent: 4019241 (1977-04-01), Logan
patent: 4129932 (1978-12-01), Stancati
patent: 4198119 (1980-04-01), Uberbacher
patent: 4220619 (1980-09-01), Kersten
patent: 4269640 (1981-05-01), Frosch et al.
patent: 4289721 (1981-09-01), Ishise

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