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US 4,201,744 AGranted
Method of making tires
AssigneeThe Goodyear Tire & Rubber Company
InventorCharles L. Makinson
Life of this patent
Estimating the term…
Abstract
A tire prepared by molding in one or more first molds of at least two separate annular tire body parts of an elastomer composition and stabilizing same, a set of said tire body parts forming a complete tire body exclusive of tread, transferring said parts to a second annular mold which positions them in the same relationship to one another that they will have in the completed tire and introducing into said second mold a predetermined quantity of an elastomer composition to join said parts and form an annular tread about the crown thereof.
Claims10
A method of making a tire comprising:
- A. molding two annular tire body parts, each in a first-stage mold having a core, said tire body parts each including a crown portion having a tread-receiving surface, a base portion, and a sidewall joining said crown portion and said base portion, said tire body parts each having integrally formed therewith a load-bearing structure intermediate its crown and its base, said structure having a plurality of webs formed by lobes of said core, said webs being spaced apart from one another in the circumferential direction of said tire, said webs extending in a direction generally parallel to the axis of rotation of said tire so that said lobes may be retracted from the molded part as a unit;
- B. arranging said two annular tire body parts in a second-stage mold in the position they will have in the completed tire, forming a tire body having a tread-receiving surface, thereby defining a tread-shaped cavity between said tread-receiving surface of said tire body and said second-stage mold;
- and
- C. filling said tread-shaped cavity with an elastomer composition to join said parts and form an annular tread thereon.
1 more element
Dependencies are inferred from the claim text.