Abstract: A reinforced, mechanical splice for toothed belts, the splice defined by overlapping belt end portions that interfit with each other with a male-end belt tongue portion having transversely oriented belt teeth with molded end receiving openings, and a female-end belt U-portion dimensioned to receive the male-end portion and having transversely aligned belt teeth with molded pin receiving openings so adapted and arranged for coaxial alignment with the male-end pin receiving openings such that the belt teeth of the male-end portion are aligned with the belt teeth of the female-end portion, the belt teeth of both end portions having an embedded reinforcement circumjacent to the pin receiving openings.

Abstract: A sprocket for use with positive drive belts of the type with oppositely facing curvilinear driving surfaces, the sprocket having improved symmetrical teeth with a cross-section profile defined by axially oriented, oppositely facing driving surface portions that extend from the top land of the tooth at an angle of about 15 degrees or less to the sprocket tooth, each driving surface of the sprocket tooth blending into an oppositely facing oblique surface at an angle of about 150 to about 170 degrees that provides a positive clearance between the sprocket tooth and side portions of a meshing belt tooth to direct egress of material away from the sprocket, the oblique surfaces define a sprocket tooth base that is wider than the sprocket tooth top land and bottom land portions between sprocket teeth providing positive clearance between the bottom land portions and belt tooth tips.

Abstract: A method of making toothed power transmission belting having preferably an elastomer-free sprocket-engaging toothed surface is described. A temperature sensitive tackifier is applied to a toothed mold surface and the belt face cover is stitched to the tacky surface, and then preferably further immobilized by winding tensile cord circumferentially about the mold. Elastomeric material is introduced into the tooth and body portions of the belt and the belting is cured. The temperature is elevated at some point during the process, whereby the tackifier loses its adherence to the mold, permitting easy demolding of the product.

Abstract: A method for casting cog-type power transmission belts from flowable elastomeric materials including the steps of forming a mold cavity defined by a mold mandrel and an outer mold shell, one of which has a plurality of axially disposed notches; wrapping preferably an extensible fabric about the surface of the notched mold portion; placing preferably fibrous loading members on the extensible fabric and superimposed over the axial notches; forcing the fibrous loading members and extensible fabric into the bottom contour of the notches; and introducing a substantial liquid elastomeric material into the mold cavity and polymerizing the elastomeric form in the mold to produce a sleeve containing one or more unitary endless cog-type belts.

Abstract: A toothed power transmission belt having a substantially inextensible tensile member with longitudinally spaced teeth secured thereto, the teeth having a longitudinal cross section configuration which includes low friction surfaces that extend generally perpendicularly from the tensile member to interconnected rounded corners that permit the belt teeth to mesh easily with teeth of a sprocket.

Abstract: An endless positive drive belt is described having a tensile-loaded castable elastomeric body supporting circumferentially spaced cogs or teeth. The alternating land and teeth portions of the belt carry a layer of wear-resistant fabric, the outer surface of which is free of elastomer due to the preferred presence of a bonded layer of elastomer impervious material during the casting operation. A method for producing the belt using the elastomer impervious material is described.