Two-piece lock for securing polymeric sheeting over greenhouses

Details Two-piece lock for securing polymeric sheeting over greenhouses Two-piece lock for securing polymeric sheeting over greenhouses

1985-07-19

1987-05-19

Bell, J. Karl

Static structures (e.g., buildings)

Tensioned or flexed sheet facing

47 17, 52202, 160354, 160380, E04B 100

Patent

active

046656707

ABSTRACT:
An improved two-piece lock for securing polymeric sheeting for use in covering greenhouses. The lock has an elongated lower member affixed to the frame of the greenhouse and one or more layers of polymeric sheeting are held in the lock between the lower member and an upper member. The upper member has two downwardly extending bars one of which fits into a channel of the lower member and the other of which abuts a concave contact bar of the lower member which faces the channel.

REFERENCES:
patent: 875552 (1907-12-01), McGee
patent: 1741958 (1929-12-01), Shogren
patent: 3909994 (1975-10-01), Richter
patent: 4231141 (1980-11-01), Derrick
patent: 4453585 (1984-06-01), Ruggeberg et al.
patent: 4566236 (1986-01-01), Pound
T-lok advertisement; Mar. 2, 1984; 1041/2 Charter. P.O. Box 358, Redwood City, CA.

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