Adjustless V-belt and method of manufacture

Details Adjustless V-belt and method of manufacture Adjustless V-belt and method of manufacture

1979-04-20

1981-05-12

Dixon, Jr., William R.

Endless belt power transmission systems or components

Positive drive belt

Drive surfaces on belt formed in or interconnected by...

156138, 156139, 156140, 156141, 474260, 474263, 474267, F16G 516, F16G 126, B29H 722

Patent

active

042669375

ABSTRACT:
An adjustless V-belt and method of manufacture. The V-belt comprises: a compressive rubber layer made of a heatproof or coldproof rubber and an adhesion rubber layer laminated on said compressive rubber layer. A group of cogs protrude from said adhesion rubber layer with a predetermined pitch and depth and a longitudinally stretchable cover canvas covers the cogs, and the roots between said cogs. Rope tensile members are embedded between the adhesion rubber layer and the group of cogs with a regular pitch line and in the cylindrical state such a manner that parts of the tensile members are in contact with said cover canvas. The rope tensile members have a high thermal contraction stress of at least 3.5 g/denier which is the differential between a thermal contraction stress at 100.degree. C. and that at room temperature (about 20.degree. C.). Short fibers are embedded in the compressive rubber layer in such a manner that the short fibers are orientated laterally therein. A ply of rubberized canvas is bonded, in lamination, to the lower surface of the compressive rubber layer. A reversal molding technique is used with the cover canvas first wound around a metal mold having protrusions and grooves followed by the rope tensile member, the adhesion rubber sheet, the compressive rubber sheet and finally the rubberized canvas. A cylindrical sleeve is placed over the belt blank thus formed and the assembly is pressurized and heated to permit a portion of the adhesion rubber to fill the grooves in the metal mold.

REFERENCES:
patent: 3473989 (1969-10-01), Richmond
patent: 3656360 (1972-04-01), Fix
patent: 3738188 (1973-06-01), Ray
patent: 3830113 (1974-08-01), Bruns
patent: 3995507 (1976-12-01), White et al.
patent: 4024773 (1977-05-01), Hartman et al.
patent: 4027545 (1977-06-01), White, Jr.
patent: 4083261 (1978-04-01), Speer et al.

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