F - Mech Eng,Light,Heat,Weapons – 16 – G
Patent
F - Mech Eng,Light,Heat,Weapons
16
G
74/248, 154/52
F16G 5/00 (2006.01) B29D 29/10 (2006.01) F16G 5/06 (2006.01)
Patent
CA 1116441
ABSTRACT OF THE DISCLOSURE An adjustless V-belt and method of manufacture. The V-belt comprises: a compressive rubber layer made of a heat- proof 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°C and that at room temperature (about 20°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.
326448
George H. Riches And Associates
Mitsuboshi Belting Ltd.
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