Two drum turret for tire assembly

Tire building apparatus comprising a turret having a master drum and a slave drum, a turret support housing, a turret shaft rotatably mounted on said housing and connected to said turret, said master drum being rotatably mounted on said turret for rotation about a master axis at a first side of said turret, said slave drum being rotatably mounted on said turret for rotation about a slave axis parallel to and spaced from said master axis at a second side of said turret, master drum power means to rotate said master drum mounted on said turret, slave drum power means to rotate said slave drum mounted on said turret, turret power means to engage and rotate said turret shaft a predetermined angular distance and then disengage from said turret shaft beyond said angular distance, shock absorber means to stop rotation of said turret after rotation beyond said angular distance, and said shock absorber means being positioned between said housing and said turret shaft for engagement with said turret after disengagement of said turret shaft from said power means to limit the movement of said turret.

A tire building apparatus comprising a turret rotatable about a turret axis, a first drum extending outwardly from a first side of said turret and rotatable about a first axis, a second drum extending outwardly from a second side of said turret and rotatable about a second axis parallel to and spaced from said first axis, turret power means to rotate said turret a predetermined angular distance to move said first drum from a first position at a first height to a second position at a second height and move said second drum from said second position to said first position providing access to said first drum and said second drum by an operator at said first height for tire component applications at a lower height above a floor surface, motion limiting means to stop rotation of said turret after rotation of said turret beyond said predetermined angular distance, said turret power means comprising a motor having a pinion gear engageable with a semi-circular gear rack mounted on said turret and having a predetermined length, and said gear rack being movable out of engagement with said pinion gear after said turret is rotated beyond said predetermined angular distance.