Abstract: When building an unvulcanised tyre from tyre components using a tyre building drum, the mutual distances considered in axial direction between a bead ring segment, a first end and a steering element of a folding arm in question are chosen such that at movement of a steering element towards the bead ring segment a steering surface comes to abut the steering element so that the roller element can be moved from a first position, after which the roller element presses an outer part of the tyre components against a bead ring core to be placed on the bead ring segment while simultaneously the roller element moves away from the longitudinal axis, wherein the steering element moves along the steering surface until the stop of the annular steering segment abuts an annular folding arm segment, after which the folding arm swivels about a swivel axle and the steering element comes to lie apart from the steering surface.

Abstract: Assembly comprising a tyre drum (1) including a turn-up mechanism (5) for use in building an unvulcanized tyre, wherein the tyre drum is provided with a central shaft (2), two bead clamps (11) and bead inner supports (13) placed around the shaft and axially spaced apart on either side of a centre plane of the tyre drum, means for radially expanding a part of the tyre components that is situated within the bead clamps, wherein the tyre drum on either side outside of the bead clamps is provided with a first and a second set of turn-up arms (5), respectively, wherein the arms at a first free end oriented towards the bead clamps are provided with a turn-up means, particularly a turn-up roller (7) or turn-up band, wherein the shaft (2) is designed hollow having a circumferential wall having an outer diameter, wherein each set of arms (5) with accompanying bead clamps (11) and bead inner supports (13) is disposed on a casing (10), of which the inner diameter corresponds with the outer diameter of the circumferentia

Abstract: A tyre drum has a central shaft, two ring segments around the shaft and spaced apart for supporting bead cores and, on either side outside of the ring segments, sets of axially extending arms having free ends with first turn-up means, particularly a turn-up roller, opposite second ends hinged to an axially shiftable arm support and, near the free end, a tyre component support roller rotatable on the arm. A shifter shifts the arm supports to move the second ends axially towards each other and tilt the arms in radial planes from the initial position to a tilting position for the first ends to press tyre components outside of the ring segments against an expanded part of the tyre components within the ring segments.

Abstract: A tire drum has a central shaft, two ring segments around the shaft and spaced apart for supporting bead cores and, on either side outside of the ring segments, sets of axially extending arms having free ends with first turn-up means, particularly a turn-up roller, opposite second ends hinged to an axially shiftable arm support and, near the free end of at least one, a tire component support roller rotatable on the arm. A shifter shifts the arm supports to move the second ends axially towards each other and tilt the arms in radial planes from the initial position to a tilting position for the first ends to press tire components outside of the ring segments against an expanded part of the tire components within the ring segments.