Abstract: The present invention provides a radial tire forming apparatus capable of being applied to the formation of a carcass band having a large folding length. On a housing for a rollover device of the tire forming apparatus, a plurality of sets of straight rail bearers are fixed at appropriate places, so that a frame provided with rails is advanced toward or retreated from a second forming point on the carcass forming former side by a cylinder fixed to the housing. The diameter of a first rollover ring is slightly smaller than the diameter of a second rollover ring. When the rollover rings are brought closest to each other, the cylindrical portions of the rings enter and lap on each other.

Abstract: An inner pressure filling apparatus for a tire-rim assembly comprises a support table which is removably fixed to a base plate via a clamp and is easily replaceable; an outer cylinder which is easily replaceable and of which upper peripheral edge is inclined with respect to a vertical-direction axis of the outer cylinder; an elevator device formed by one cylinder which moves upward and downward and a plurality of springs; an air filling device for filling pressurized air into a tire of the tire-rim assembly; and a control device supplying pressurized air into the elevator device and the air filling device to move the elevator device upward and downward and controlling the elevator device and the air filling device so as to actuate the air filling device to fill pressurized air into the tire. Accordingly, the inner pressure filling apparatus as a whole becomes simple in construction and enables simple replacement of the base plate and the outer cylinder in accordance with the size of the tire-rim assembly.

Abstract: A skiving equipment which permits a great reduction of labor and also permits the skiving work to be done always to an appropriate extent.

Abstract: An apparatus for building tires includes belt ply supply devices, first and second tread supply devices, first and second band forming drums rotatable and expansible and contractible, a taking-out device for alternately removing formed bands from the band forming drums, a first moving device for successively moving the first forming drum to the supply positions of the respective belt ply supply devices and the first tread supply device and a taking-out position of the taking-out device to successively wind belt plies and a tread around the first band forming drum and to remove a formed band from the first band forming drum, and second moving device for successively moving the second band forming drum to the supply positions of the respective belt ply supply devices and the second tread supply device and the taking-out position of the taking-out device to successively wind belt plies and a tread around the second band forming drum and to remove a formed band from the second band forming drum.

Abstract: The belt-shaped member supplying method and apparatus are used for cutting a long material paid out of a winding roll into a belt-shaped member of a predetermined length and supplying the belt-shaped member onto a winding drum by means of a transfer device.

Abstract: For folding an annular resilient band about a circumferential fold line, the band is first wrapped on a generally cylindrical, radially collapsible drum structure having a cylindrical external contour about the center axis of the drum and an annular zone radially inward of the contour with an inflatable annular first bladder positioned in such a manner as to have a folded-over axial end portion axially protruding into the aforesaid annular zone and with an inflatable annular second bladder positioned radially inwardly of the first bladder and in such a manner that the first and second bladders have axial portions overlapping each other, whereupon the first bladder is inflated to a medium expanded state so that an axial end portion of the band on the drum structure is contacted by the bladder and displaced radially outwardly and thereafter the first bladder is moved axially away from the drum structure for forming an annular gap between the first bladder and the axial end portion of the band, the second bladde

Abstract: A radial tire building drum for forming a radial tire green case having bead portions into a toroidal shape, includes a drive shaft rotatable about a center axis of rotation and movable in a fore-and-aft direction thereof, a pair of drum units carried on the drive shaft and having a common center axis of rotation which is in axially alignment with the center axis of the drive shaft, the drum units being axially movable toward and away from each other along the center axis of the drive shaft by driving at least one of the drum units to move along the common center axis of rotation, a plurality of arcuate drum segments each retained to the pair of drum units and formed with an annular groove circumferentially extending therethrough, each of the arcuate drum segments being radially movable toward and away from the common center axis.

Abstract: Herein disclosed are pneumatic tire building method and apparatus for applying a continuous rubber strip on a tire carcass preliminarily wrapped around a tire building drum to produce a pneumatic tire having a tread rubber portion and one or more side rubber portions both of which or any one of which consists of different rubber materials. A pair of calender rollers are positioned in opposing and spaced relation with each other and each having a rotational axis parallel to that of said tire building drum, and at least one comparment plate is vertically disposed on and between said calender rollers in perpendicular relation with said rotational axes of said calender rollers and having a lower edge contoured in sliding contact with said calender rollers. At least one separator relatively movably mounted on said compartment plate and having a lower edge contoured in sliding contact with said calender rollers to separate and joint said calendered rubber materials.