F - Mech Eng,Light,Heat,Weapons – 16 – G
Patent
F - Mech Eng,Light,Heat,Weapons
16
G
18/1006, 74/248
F16G 5/00 (2006.01)
Patent
CA 1116442
ABSTRACT OF THE DISCLOSURE An adjustless V-belt having a compressive rubber layer made of heatproof rubber or coldproof rubber and an ad- hesion rubber layer laminated on the upper surface of said compressive rubber layer. A group of first cogs protrude from the adhesion rubber and have a predetermined depth and arranged at a predetermined pitch A cover canvas is stretchable in the longitudinal direction of the V-belt, and covers the first cogs and roots between the first cogs. Rope tensile members are embedded between the adhesion rubber layer and the group of first cogs with a regular pitch line in such a manner that the tensile members form a cylinder and parts of the tensile members are in contact with the cover canvas. The rope tensile members have a thermal contraction stress of at least 3.5 g/denier, the difference between the thermal contraction stress at 100°C and that at room temperature. Short fibers are embedded laterally in the compressive rubber layer and a group of second cogs are formed on the lower surface of the compressive rubber layer. The method comprises the steps of (1) winding a longitudinally stretchable cover canvas around a metal mold on the outer wall of which strip-like protrusions and grooves are alternately provided; (2) spirally winding rope tensile members subjected t- thermal elongation around the cover canvas; (3) winding an adhesion rubber sheet on the rope tensile members; (4) winding a compressive rubber sheet containing short fibers laterally arranged, around the adhesion rubber sheet, thereby to form a molded belt blank; (5) placing a cylindrical mold in the inner wall of which a group of cogs are formed over the molded belt blank; and (6) heating and pressurizing the molded belt blank to permit a part of the adhesion rubber sheet to flaw to fill the grooves of the metal mold, and to permit a part of the compressive rubber sheet to flow to fill the grooves of the cylindrical mold, to either form two groups of cogs on the upper and lower surfaces of the molded belt blank, respectively or, a group of cogs covered with the cover canvas on the surface of the compressive rubber layer.
327004
George H. Riches And Associates
Mitsuboshi Belting Ltd.
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