TIRE BUILDING DRUM ASSEMBLY

• US 3,576,693 A
• Filed: 12/15/1967
• Issued: 04/27/1971
• Est. Priority Date: 12/22/1966
• Status: Expired due to Term

• Current Assignee: Pirelli Coordinamento Pneumatici SpA
• Original Assignee: Caretta Renato, Pacciarini Antonio
• Inventors: PACCIARINI ANTONIO, CARETTA RENATO
• Application Number:
  US04/691,060
• Time in Patent Office: 1,229 Days
• US Class Current: 156/417
• CPC Class Codes: B29D 30/242 for manufacturing substantially cylindrical tyre components without cores or beads, e.g. treads or belts

Abstract

A RIGID COLLAPSIBLE DRUM ASSEMBLY INCLUDING A PLURALITY OF ARCUATE SECTORS DISPOSED ABOUT A ROTATABLE SHAFT AND MEANS TO DISPLACE SAID SECTORS RADIALLY WITH RESPECT TO SAID SHAFT, THE AMOUNT OF DISPLACEMENT AND THE ARCUATE LENGTH OF THE SECTORS BEING SUCH THAT A CONTINUOUS OUTER SURFACE IS FORMED BY THE SECTORS IN THEIR OUTERMOST RADIAL POSITION AND IN THEIR INNERMOST RADIAL POSITION.

Claims