Grooved drum for tire building machine

Details Grooved drum for tire building machine Grooved drum for tire building machine

B - Operations, Transporting

29

D

B29D 30/26 (2006.01) B29D 30/24 (2006.01) B29D 30/32 (2006.01)

Patent

CA 2049696

0900023 GROOVED DRUM FOR TIRE BUILDING MACHINE ABSTRACT OF THE DISCLOSURE An apparatus for building a tire having an inner liner to which a sealant strip is to be laminated, comprises a rotary drum having a surface in which a trough or "groove" is provided. The depth of the groove corresponds approximately to the thickness of a layer of an elastomeric sealant which is to be placed in the groove. If the walls of the groove are contoured so as to confine the sealant layer in a specified manner while accomodating the thermo-viscous properties of the laminate, the completed first stage carcass may be remov- ed without damaging the sealant layer which is adhered to the inner liner. The rotary drum is provided with fingers movable to a position to support the tire bead by means of an annular piston and cylinder surrounding the shaft of the drum and connected to the fingers by bell cranks which are pivotally mounted in the drum and operatively interconnected with means to move the fingers radially between an inactive position and a bead engaging position in response to appropriate axial movement of the drum mechanism.

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