Flexible form sheet

Details Flexible form sheet Flexible form sheet

1989-01-26

1990-05-08

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428180, 428179, 428174, 428120, 52220, 52380, 52381, 52382, 249117, B32B 300, B32B 328

Patent

active

049237330

ABSTRACT:
A flexible form sheet is described, which is used for producing plaster cavity floors. The sheet has regularly distributed, leg-like bulges. The bulges are interconnected by horizontal sheet surfaces. Increased flexibility areas are located between the bulges, and are preferably deformed. They are appropriately constructed as zig-zag or concertina-like strips concentrically surrounding the bulges. This provides an increase in the vertical reciprocal mobility of the bulges, so that on applying the plaster, the form sheet can adapt to unevennesses of the underfloor.

REFERENCES:
patent: 2007689 (1935-07-01), Merrill
patent: 2602323 (1952-07-01), Leemhuis
patent: 3218767 (1965-11-01), Stark
patent: 3288998 (1966-11-01), Press, Jr.
patent: 3334458 (1967-08-01), Leemhuis
patent: 3501878 (1970-03-01), Segal
patent: 3575781 (1971-04-01), Pezely
patent: 4144369 (1979-03-01), Wass
patent: 4637184 (1987-01-01), Radtke et al.
patent: 4640854 (1987-02-01), Radtke

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