Expandable tire building drum

Details Expandable tire building drum Expandable tire building drum

1988-05-09

1989-08-08

Hoch, Raymond

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Tire body building type

156417, B29D 3024

Patent

active

048550086

ABSTRACT:
A segmental drum (10) has a plurality of axially extending circumferentially spaced segments (36) with flexible connections (56) to shoulder pistons (32) at opposite ends of each segment (36). Wedge shaped bars (62) are positioned between the segments (36) and connected to center pistons (64) for urging tapered side faces (80) of the bars (62) into engagement with sloping side faces (78) of the segments (36). Elastic turnup bladders (42) are positioned outward of the segments (36) with nose portions (40) overlapping the ends of the segments (36) for resiliently returning the segments (36) and bars (62) to a retracted condition after expansion by radially outward movement of the shoulder pistons (32) and center pistons (64).

REFERENCES:
patent: 3237199 (1966-02-01), Brey
patent: 3485700 (1969-12-01), Cooper et al.
patent: 3576693 (1971-04-01), Pacciarini et al.
patent: 3644162 (1972-02-01), Appleby et al.
patent: 4325764 (1982-04-01), Appleby et al.
patent: 4683021 (1987-07-01), Stalter et al.

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