Flexible or portable closure – partition – or panel – Pleating type – Lazy-tong links pivot about axes parallel to panel
Patent
1990-08-10
1991-12-17
Friedman, Carl D.
Flexible or portable closure, partition, or panel
Pleating type
Lazy-tong links pivot about axes parallel to panel
160348, A47H 500
Patent
active
050727672
ABSTRACT:
A goods-handling door comprises a raisable curtain 1 which folds concertina-like and which is stiffened by reinforcing bars 2 having rings 4 through which lifting straps 3 are passed, which straps are wound onto a top shaft 5. During lifting and while the curtain is folding, it is desirable for the curtain to fold regularly and in a preferred direction. Flexible and inextensible elements 11 are placed between adjacent bars in order to limit the spacing between the bars, and they are given a structure which facilitates folding in the desired direction.
REFERENCES:
patent: 2648379 (1953-08-01), Bishop
patent: 4727919 (1988-03-01), Kraeutler
patent: 4921032 (1990-05-01), May
Berger Derek J.
Friedman Carl D.
Nergeco (SA)
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