Frost control system for high-speed mechanized doors
US4950869A · kind A · utility
18Cited by
8References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D13/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.