Plant husbandry – Greenhouse – apparatus or method
Patent
1980-08-01
1983-06-14
Bagwill, Robert E.
Plant husbandry
Greenhouse, apparatus or method
52 2, 52 22, 52 63, A01G 900, E04B 112
Patent
active
043875335
ABSTRACT:
An improved building, e.g., a greenhouse structure, is provided herein. It consists of an enclosure having a pair of spaced-apart walls, e.g., an outer light transparent covering and an inner light transparent membrane spaced apart from the outer covering. A fan is provided for charging the space between the covering and the membrane with air, under pressure having a dew point so selected that it will not allow condensation to take place, e.g., outdoor air, or, preferably, heated air. An insulating layer is disposed in the pressurized air space between the outer covering and the inner membrane so that it is bathed, on both its faces, with the low dew point air under pressure. The insulating layer includes an insulating blanket disposed between the outer covering and the inner membrane, and is positively movable between an extended covering position and a retracted stored position. Operating structure is connected to a leading edge of the blanket and this structure is adapted to move the leading edge from its retracted stored position to its extended covering position. Cooperative structure is provided operatively associated with the trailing portion of the blanket. This structure is adapted to draw the blanket from its extended covering position to its retracted stored position. This provides a system in which heat loss from within the structure is minimized at night and yet does not result in excessive condensation within the structure.
REFERENCES:
patent: 2193921 (1940-03-01), Gibbons
patent: 3481073 (1969-12-01), Yoshida et al.
patent: 4064648 (1977-12-01), Cary
patent: 4067347 (1978-01-01), Lipinski
patent: 4073089 (1978-02-01), Maginnes et al.
Green George H.
Maginnes Edward A.
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