Box-shaped container for use as a cold frame

Details Box-shaped container for use as a cold frame Box-shaped container for use as a cold frame

1982-03-22

1984-02-07

Hafer, Robert A.

Plant husbandry

Bench or elevated bed, hotbed

47 17, 47 19, A01G 906

Patent

active

044294891

ABSTRACT:
A box-shaped container for use as a cold frame is composed of a number of side wall panels and a cover. The side wall panels and the cover are formed of hollow transparent panels of plastics. The side walls are connected to each other by connecting angle-shaped elements forming stop faces abutting against respective end surfaces of the adjacent walls to be connected. The connecting elements are formed with holes receiving stud pins extended through respective bores in side wall panels and locked thereon by locking members.

REFERENCES:
patent: 1809929 (1931-06-01), Farmer
patent: 1870132 (1932-08-01), Miller
patent: 2339220 (1944-01-01), Crowley
patent: 2545717 (1945-12-01), Voigt
patent: 3321864 (1967-05-01), Stasiuk
patent: 3889419 (1975-06-01), Maleck
patent: 3912407 (1975-10-01), Heininger

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