Barrier sheet and method of manufacturing same
AssigneeUnited Tire & Rubber Co. Limited
InventorJohn S. Shackleton
Life of this patent
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Abstract
A barrier sheet suitable for use in the manufacture of cured rubber products, such as tires, belts or the like, is produced by a method which includes the steps of coating elongated reinforcement cords with uncured rubber, cutting the coated reinforcement cords to form short lengths, lubricating the short lengths to prevent balling and sheeting-out the fine particles to form a sheet of green barrier material. The barrier sheet formed by this method may be laid in to a tire during a tire building operation to form a tire reinforcement.
Claims16
A method of forming a barrier sheet suitable for use in the manufacture of cured rubber products, such as tires, belts and the like comprising the steps of:
- (a) coating elongated reinforcement cords with uncured rubber;
- (b) cutting the coated reinforcement cords to form short lengths suitable for subsequent cryogenic shattering;
- (c) lubricating the short lengths to prevent balling thereof;
- (d) cooling the short lengths to a temperature suitable to permit cryogenic shattering;
- (e) shattering the cooled short lengths to form fine particles;
- (f) permitting the fine particles to return to a temperature suitable for sheeting-out;
- (g) sheeting-out the fine particles to form a sheet of green barrier material.
In a method of manufacturing a tire the improvement wherein a green barrier sheet is formed by coating elongated fibre cords with uncured rubber, cutting the coated rubber cords into short lengths suitable for subsequent cryogenic shattering, lubricating the short lengths to prevent balling, cryogenically shattering the cooled short lengths to form a fine particulate material, permitting the fine particle material to return to a temperature suitable for sheeting-out, sheeting-out the fine particle material to form a sheet of green barrier material, cutting said sheet of green barrier material to form a tire barrier sheet, laying-in said tire barrier sheet in a tire during construction of a tire and curing the tire thus formed to bond the tire barrier sheet in place within the tire.
Dependencies are inferred from the claim text.