Apparatus for processing polyethylene terephthalate preforms

Details Apparatus for processing polyethylene terephthalate preforms Apparatus for processing polyethylene terephthalate preforms

1981-11-02

1983-08-02

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1041, 219 1057, 219 1081, 264 25, 264 26, 264535, 264DIG46, 425174, 4251748R, 4251748E, H05B 654, B29H 526

Patent

active

043968163

ABSTRACT:
This relates to the heating of polyethylene terephthalate by way of RF energy. It has been found that if polyethylene terephthalate articles are passed through a radio frequency energy field, the molecules thereof will become excited and rapid heating will result. This heating is particularly useful in the heating of preforms prior to the blow molding thereof and by varying the configuration and relationship of electrodes, controlled heating of the preforms may be effected with it being possible to have a controlled temperature differential along the length of the preform or other article so heated.

REFERENCES:
patent: 2415025 (1947-01-01), Grell et al.
patent: 2472370 (1949-06-01), Drugmand
patent: 2949677 (1960-08-01), Cameron
patent: 3443049 (1969-05-01), Hoagland

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