Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1982-01-04
1984-01-31
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
264283, 264333, D01D 520
Patent
active
044288980
ABSTRACT:
The present invention concerns a construction element, in particular containing plaster, in a plate which includes reinforcements distributed throughout the greater part of its thickness, such that along lines parallel to the sides of the plate, the reinforcements are concentrated in predetermined zone of the thickness and the plaster is removed plumb with these lines which may thus become folding lines to achieve a non-planar element. The invention also concerns a process and apparatus for manufacturing these construction elements. The invention applies, in particular, to the manufacture of U-shaped plasterboard panels for use in ceilings and in building structures.
REFERENCES:
patent: 2047197 (1936-07-01), Fordyce
patent: 2505152 (1950-04-01), Shearer
patent: 3197536 (1965-07-01), French
patent: 3289371 (1966-12-01), Pearson et al.
Buck Yves
Delcoigne Adrien
A. Earley John F.
Czaja Donald E.
Housel James C.
Isover Saint-Gobain
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