Method for producing a positive drive belt
AssigneeThe Gates Rubber Company
InventorJohn D. Redmond, Jr.
Life of this patent
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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.
Claims19
A method for casting cog-type power transmission belts from flowable elastomeric material comprising the steps of:
- a. forming a mold cavity defined by a mold mandrel and an outer mold shell, one of said mandrel or shell having a plurality of notches therein disposed substantially parallel to the axis of the mold;
- b. wrapping an extensible fabric about the surface of the notched mold portion;
- c. placing loading members upon the extensible fabric and positioned opposite of and extending in the same direction as said notches;
- d. forcing said loading members and the extensible fabric ahead of the loading into the bottom contour of said notches;
- e. introducing a substantially liquid elastomeric material into said mold cavity;
- and
- f. polymerizing the resultant formed product to form one or more unitary endless belt members.
A method for casting positive drive power transmission belting from flowable elastomeric material comprising the steps of:
- forming a mold cavity defined by a mold mandrel and an outer mold shell, one of said mandrel or shell having a plurality of notches therein disposed substantially parallel to the axis of the mold;
- wrapping a fabric about the surface of the notched mold portion;
- locating loading members upon the fabric and positioned opposite of and extending in the same direction as said notches;
- wrapping a fibrous tensile layer upon the loading members and in a direction transverse to said loading members in a manner to force said loading members and the fabric ahead of the loading members into conformance with the bottom of the notches;
- said transverse members filling a major proportion of the distance between the fibrous tensile layer and the bottom of said notches;
- introducing a substantially liquid elastomeric material into said mold cavity;
- and
- polymerizing the resultant formed product to form a sleeve of belting from which one or more unitary endless belt members of the positive drive type may be severed.
Dependencies are inferred from the claim text.