Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
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.
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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
Robinson Ellis P.
Watkins III William P.
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