Cement board having reinforced edges

Details Cement board having reinforced edges Cement board having reinforced edges

1989-04-07

1993-06-22

Chin, Peter

Adhesive bonding and miscellaneous chemical manufacture

Methods

Plaster board making

156 42, 156348, B32B 318

Patent

active

052213862

ABSTRACT:
A cement board having bare surfaces and a woven mesh of reinforcing fibers underlying the top, bottom, and longitudinal edge surfaces is made continuously on an improved apparatus which comprises a pair of edger rails which slidably rest on a conveyor belt and define the path of the cement board being made on the conveyor belt and a means for folding and pressing outer margins of the bottom mesh into the edge surfaces and the top surface.

REFERENCES:
patent: 1787163 (1930-12-01), New
patent: 1808003 (1931-06-01), New
patent: 2035495 (1936-03-01), Mills
patent: 3373065 (1968-03-01), Gutzman et al.
patent: 3578517 (1971-05-01), Lapp et al.
patent: 4187275 (1980-02-01), Bracalielly et al.
patent: 4203788 (1980-05-01), Clear
patent: 4450022 (1984-05-01), Galer
patent: 4488917 (1984-12-01), Porter et al.
patent: 4504335 (1985-03-01), Galer
patent: 4810569 (1989-03-01), Lehnert et al.

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