Method for making patches for rubber articles

Claim 1

A METHOD OF MAKING A REPAIR PATCH FOR A RUBBER INNER TUBE WHICH COMPRISES, COATING A FLEXIBLE CARRIER SHEET WITH AN EXTREMELY THIN LAYER OF VULCANIZABLE RUBBER COMPOUND IN AN UNCURED STATE, LAYING SAID CARRIER WITH ITS COATED SIDE AGAINST AN UNCURED VULCANIZABLE RUB BER DISC TO FORM A STACK IN WHICH THE DISC IS ENGAGED AGAINST A LAYER OF RUBBER ADHESIVE COATED ON A SHEET OF PROTECTIVE MATERIAL WITH THE RUBBER DISC SANDWICHED BETWEEN THE LAYERS, SAID LAYERS BENG PROVIDED TO PROTRUDE BEYOND THE MARGINAL EDGES OF THE DISC ON ALL SIDES THEREOF WITH THE PROTRUDING PORTIONS OF THE LAYERS IN FACE TO FACE CONTACT ALONG THE ENTIRE FACING AREAS THEREOF, PRESSING SAID STACK WITH A HOT PLATEN JUXTAPOSED THE CARRIER SHEET INTO A RESILIENT CUSHION CARRIED ON A COLD PLATEN WITH CUSHION JUXTAPOSED THE PROTECTIVE SHEET IN A PREDETERMINED VULCANIZATION PROCEDURE IN WHICH THE DISC IS DEFORMED TO PROVIDE A THICK CENTRAL BODY AND AN INTEGRAL PERIPHERAL RIM OF EXTREME THINNESS PROJECTING BEYOND THE BODY PORTION, SAID PROCEDURE AFFECTING COMPLETE VULCANIZATION OF THE DISC AND PERMANENT UNION OF THE RUBBER COMPOUND LAYER AND ADHESIVE LAYER TO FORM THE RIM BY CURING OF THE ENTIRE RUBBER COMPOUND LAYER AND ONLY THE PORTIONS OF ADHESIVE LAYER ADJACENT THE RUBBER COMPOUND LAYER AND THE DISC AND WITHOUT CURING THOSE PORTIONS OF THE ADHENSIVE LAYER IMMEDIATELY ADJACENT THE PROTECTIVE SHEET.

Claim 2

A METHOD OF MAKING A REPAIR PATCH FOR A RUBBER INNER TUBE WHICH COMPRISES, COATING A FLEXIBLE CARRIER SHEET WITH AN EXTREMELY THIN LAYER OF VULCANIZABLE RUBBER COMPOUND IN AN UNCURED STATE, LAYING SAID CARRIER WITH ITS COATED SIDE AGAINST AN UNCURED VULCANIZABLE RUB BER DISC TO FORM A STACK IN WHICH THE DISC IS ENGAGED AGAINST A LAYER OF RUBBER ADHESIVE COATED ON A SHEET OF PROTECTIVE MATERIAL WITH THE RUBBER DISC SANDWICHED BETWEEN THE LAYERS, SAID LAYERS BENG PROVIDED TO PROTRUDE BEYOND THE MARGINAL EDGES OF THE DISC ON ALL SIDES THEREOF WITH THE PROTRUDING PORTIONS OF THE LAYERS IN FACE TO FACE CONTACT ALONG THE ENTIRE FACING AREAS THEREOF, PRESSING SAID STACK WITH A HOT PLATEN JUXTAPOSED THE CARRIER SHEET INTO A RESILIENT CUSHION CARRIED ON A COLD PLATEN WITH CUSHION JUXTAPOSED THE PROTECTIVE SHEET IN A PREDETERMINED VULCANIZATION PROCEDURE IN WHICH THE DISC IS DEFORMED TO PROVIDE A THICK CENTRAL BODY AND AN INTEGRAL PERIPHERAL RIM OF EXTREME THINNESS PROJECTING BEYOND THE BODY PORTION, SAID PROCEDURE AFFECTING COMPLETE VULCANIZATION OF THE DISC AND PERMANENT UNION OF THE RUBBER COMPOUND LAYER AND ADHESIVE LAYER TO FORM THE RIM BY CURING OF THE ENTIRE RUBBER COMPOUND LAYER AND ONLY THE PORTIONS OF ADHESIVE LAYER ADJACENT THE RUBBER COMPOUND LAYER AND THE DISC AND WITHOUT CURING THOSE PORTIONS OF THE ADHENSIVE LAYER IMMEDIATELY ADJACENT THE PROTECTIVE SHEET.