Electric heating – Heating devices – With heating unit structure
Patent
1986-05-30
1988-01-12
Goldberg, Elliot A.
Electric heating
Heating devices
With heating unit structure
210388, 210748, H05B 344, H05B 350
Patent
active
047193360
ABSTRACT:
The process of molding thermal insulating blocks and electrical heating units with a mold having a horizontal filter screen in which a slurry containing a mass of inorganic fibers, water, and a binder is mixed to randomly orient the fibers and thereafter poured into the mold and a first portion of the liquid component of the slurry drained through the screen, thereafter vibrating the screen and mold to drain a second portion of the liquid component of the slurry through the screen to produce a filter mat, thereafter drying the filter mat to remove the remaining liquid component of the slurry from the mat, and thereafter heating the filter mat to bond the fibers to each other. An electrical heating element may be mounted on the mold before the slurry is introduced into the mold. The products produced by the process have densities in excess of 30 pounds per cubic foot.
REFERENCES:
patent: 2094786 (1937-10-01), Flint
patent: 2632366 (1953-03-01), Ahlfors
patent: 3500444 (1970-03-01), Hesse et al.
patent: 4267046 (1981-05-01), Stoev et al.
patent: 4278877 (1981-07-01), Werych
patent: 4299364 (1981-11-01), Loniello
patent: 4457839 (1984-07-01), Bailey
patent: 4617450 (1986-10-01), Boes et al.
Donovan Lincoln
General Signal Corporation
Goldberg Elliot A.
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