Frost control system for high-speed mechanized doors

Details Frost control system for high-speed mechanized doors Frost control system for high-speed mechanized doors

1988-10-19

1990-08-21

Walberg, Teresa J.

Electric heating

Heating devices

Combined with diverse-type art device

219213, 62248, H05B 384, F25D 2108

Patent

active

049508695

ABSTRACT:
A frost control system for a freezer door which has a header disposed along the top of a doorway for supporting a downwardly depending curtain configured for movement between a closed, extended position and an open, retracted position. Heating elements are secured to the header to inhibit frost formation on the header. In an alternate embodiment, a heat lamp is disposed on the "warm" side of the curtain proximate the doorway for directing radiant heat at the curtain to thereby inhibit the formation of frost thereon.

REFERENCES:
patent: 2731804 (1956-01-01), Grubbs
patent: 2858408 (1958-10-01), Barroero
patent: 3141954 (1964-07-01), Simon
patent: 3186185 (1965-06-01), Bently
patent: 3612821 (1971-10-01), Stromquist
patent: 3697723 (1972-10-01), Winsler
patent: 4109484 (1978-08-01), Cunningham
patent: 4516482 (1985-05-01), Smith
Electrical Construction and Maintenance, vol. 67, No. 7, Jul. 1968, p. 134.

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