TIRE BUILDING DRUM

• US 3,674,604 A
• Filed: 11/17/1969
• Issued: 07/04/1972
• Est. Priority Date: 02/25/1966
• Status: Expired due to Term

• Current Assignee: Gazuit Georges
• Original Assignee: Gazuit Georges
• Inventors: GAZUIT GEORGES
• Application Number:
  US04/877,400
• Time in Patent Office: 960 Days
• US Class Current: 156/415
• CPC Class Codes: B29D 2030/3214 Locking the beads on the drum; details of the drum in the bead locking areas, e.g. drum shoulders
• CPC Class Codes: B29D 30/245 Drums for the single stage building process, i.e. the building-up of the cylindrical carcass and the toroidal expansion of it are realised on the same drum expansion to a toroidal shape B29D30/36
• CPC Class Codes: B29D 30/36 Expansion of tyres in a flat form , i.e. expansion to a toroidal shape independently of their building-up process, e.g. of tyres built by the flat-tyres method or by jointly covering two bead-rings

Abstract

In this Rind-type drum for making tires described in my co-pending application Ser. No. 617,658 now abandoned in favor of applicant'"'"''"'"'s continuation Ser. No. 28,281, filed Apr. 22, 1970, entitled "Tire Building Machine," the bead clamping means consist for each flange supporting same of an annular set of pivoted arms each formed with an outer bent radially away from the drum axis, this end carrying a pivoted finger formed with a forked outer end and radially urged away from the drum axis by a spring reacting against said arm, and a link connecting said arm to the moveable end of a double-acting cylinder mounted in said flange at a point nearer to the drum axis than the fulcrum of said arm, the movement of the operative end of said cylinder towards the transverse plane of symmetry of the drum causing the arm to move away from the drum axis so that the outer end of said arm, by co-acting with said pivoted finger, engages the bead of the tire carcass somewhat like a pair of tongs.

Claims