Toothed belts formed mainly of thermoplastic material and method of making
AssigneeDayco Products, Inc.
InventorsDanny L. Thomas, Clinton L. Bishop
Life of this patent
Estimating the term…
Abstract
A toothed belt construction formed mainly of thermoplastic material and method of making the same are provided, the method including the steps of disposing at least one layer of the thermoplastic material about the outer peripheral surface of a building drum that has the outer peripheral surface thereof defined by alternating teeth and grooves, and then forcing the one layer of thermoplastic material toward the drum while the temperature of the one layer of thermoplastic material is above its softening temperature and below its melting temperature so as to cause at least part of the one layer of thermoplastic material to exude into the grooves to form at least part of the plurality of teeth of the belt construction.
Claims10
In a method of making a belt construction mainly of thermoplastic material and having opposed sides one of which comprises a plurality of teeth and the other of which comprises a backing portion of said belt construction, said thermoplastic material being of the type of material that has only been used to form a toothed belt construction by having been heated to a temperature above its melting temperature so as to be in a molten condition thereof and then been injection molded while in said molten condition thereof to form that toothed belt construction, the improvement comprising the steps of disposing one layer of said thermoplastic material about the outer peripheral surface of a building drum that has said outer peripheral surface thereof defined by alternating teeth and grooves, and then forcing said one layer of thermoplastic material toward said drum while the temperature of said one layer of thermoplastic material is above its softening temperature and below its melting temperature so as to cause part of said one layer of thermoplastic material to exude into said grooves to form at least the major portion of said plurality of teeth and to cause another part of said one layer of thermoplastic material to form at least the major portion of said backing portion of said belt construction.
In a method of making a belt construction mainly of thermoplastic material and having opposed sides with reinforcing tensile means between said opposed sides one of which comprises a plurality of teeth and the other of which comprises a backing portion of said belt construction, said thermoplastic material being of the type of material that has only been used to form a toothed belt construction by having been heated to a temperature above its melting temperature so as to be in a molten condition thereof and then been injection molded while in said molten condition thereof to form that toothed belt construction, the improvement comprising the steps of disposing one layer of said thermoplastic material about said reinforcing tensile means that has been wound on the outer peripheral surface of a building drum that has said outer peripheral surface thereof defined by alternating teeth and grooves, and then forcing said one layer of thermoplastic material toward said drum while the temperature of said one layer of thermoplastic material is above its softening temperature and below its melting temperature so as to cause part of said one layer of thermoplastic material to exude through said tensile means and enter into said grooves to form at least the major part of said plurality of teeth and to cause another part of said one layer of thermoplastic material to form at least the major portion of said backing portion of said belt construction.
Dependencies are inferred from the claim text.