Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1986-01-08
1988-01-26
Goldberg, E. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219422, 219539, 219544, 425DIG13, 425548, 425379R, H05B 348
Patent
active
047218479
ABSTRACT:
A electric runner distributor heater for use in passageway of a mold into which a flow stream of fluid plastic material is introduced and which in turn communicates with a plurality of sprue orifices. The heater includes a metal casing having an exposed surface over which the fluid material is directed at an elevated temperature, a plurality of unsheathed electrical heating elements disposed in respective zones of the casing corresponding to the location of selected of the sprue orifices, heat transmitting material compacted in the bore of the casing and surrounding each heating element for electrically insulating the heating element from the casing and filling all air voids between the casing and heating element to effect direct heat transfer to the casing from the heating element, leads coupling the heating elements to a power source, and a control for independently controlling the temperature of the heating elements and thus the temperature of respective zones of the casing.
REFERENCES:
patent: 2777931 (1957-01-01), Bundegaard
patent: 2834992 (1958-05-01), Jupa
patent: 3307135 (1967-02-01), Simmons
patent: 3439150 (1969-04-01), Wells
patent: 3678249 (1972-07-01), Lennox
patent: 3970822 (1976-07-01), Wrob
patent: 4039995 (1977-08-01), Walton
patent: 4039996 (1977-08-01), Handerhan
Fast Heat Element Mfg. Co., Inc.
Goldberg E. A.
Walberg Teresa J.
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