Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Dividing work to form plural articles
Patent
1989-04-14
1990-10-16
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Dividing work to form plural articles
264108, 264258, B29C 4514, B29C 4516
Patent
active
049633082
ABSTRACT:
A method of making power transmission belt including an endless belt body made of an elastomer matrix. Embedded in the endless body are tensile cords used to strengthen the belt. Along the inner circumference of the belt are formed a plurality of teeth having teeth bottoms there between. Embedded in the endless belt body between the tensile cords and the surfaces of the teeth and teeth bottoms is a layer composed of nonwoven fabric having the elastomer matrix permeated therethrough. The nonwoven fabric layer is evenly diffused in the teeth, but is compressed at the tooth bottoms to form, along with the elastomer matrix permeated therethrough, a thinly compressed layer protecting the tensile cords. The nonwoven fabric is placed around the outer cylindrical surface of a cylindrical internal die in a substantially uncompressed state. The tensile cords are wound spirally over the nonwoven fabric to compress the fabric to a predetermined thickness. Elastomeric material is injected into the die and hardened to form the transmission belt.
REFERENCES:
patent: 3103703 (1963-09-01), Ludewig
patent: 3200180 (1965-08-01), Russ
patent: 3404578 (1968-10-01), Koch et al.
Minamimure Mamoru
Watanabe Katuki
Bando Chemical Industries Ltd.
Durkin II Jeremiah F.
Woo Jay H.
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