Abstract: In a method of manufacturing a spoke wheel premounted spokes, prior to finally tensioning them, are loaded under strain of tension by a substantial force and are subsequently unloaded again. This pre-stretching process improves the quality of the wheel. An apparatus for performing this method comprises a frame, coupled survelling arms having diabolo rollers for automatically positioning and centering the spoke wheel in the apparatus, regardless of its diameter, and pressure rollers for loading the premounted spokes of the spoke wheel sideways.

Abstract: The invention relates to a method for laying a pneumatic tire around a wheel rim by a mounting unit which is moved along the wheel rim.According to the invention at least one pair of mounting units is moved with equal speeds along the wheel rim in opposite directions through angles, which together form an angle of substantially 360.degree..The invention further relates to an apparatus for laying a pneumatic tire around a wheel rim using the method wherein a mounting unit is movable along the wheel rim.According to the invention at least one pair of mounting units is provided, which are movable with equal speeds in opposite directions along the wheel rim and which together cover an angle of substantially 360.degree..

Abstract: Apparatus for forming circular rims for bicycle wheels from metal profiled strip material in which first strip pieces are cut to a length corresponding to the circumferential length of the rims, curved end portions are formed on each strip piece, and each strip piece is introduced into a three-roll ring rolling apparatus. After the strip piece has been worked up to the trailing curved end portion thereof, the adjustable middle roll of the rolling apparatus is shifted a small distance towards the two outer rolls into a position corresponding with a substantially bending-free passage of the trailing curved end portion of the strip piece.

Abstract: Apparatus for forming circular rims for bicycle wheels from metal profiled strip material in which first strip pieces are cut to a length corresponding to the circumferential length of the rims, curved end portions are formed on each strip piece, and each strip piece is introduced into a three-roll ring rolling apparatus. After the strip piece has been worked up to the trailing curved end portion thereof, the adjustable middle roll of the rolling apparatus is shifted a small distance towards the two outer rolls into a position corresponding with a substantially bending-free passage of the trailing curved end portion of the strip piece.

Abstract: An apparatus for detecting lateral irregularities of the rim of a wire spoke wheel, in particular for use in a machine for centering such spoke wheels of the type having a wheel spindle, a hub rotatable on the spindle, a wheel rim and a plurality of adjustable spokes extending between the hub and the rim. The apparatus comprises spindle holding means for receiving and fixedly holding the wheel spindle and mounted in the frame of the apparatus for free sliding movement in the axial direction of the wheel spindle, and two oppositely arranged rim followers adapted to engage the wheel rim on both sides thereof at one location of the wheel circumference so as to hold the rim in a fixed lateral position at this location while allowing the wheel rim to be rotated about the spindle, and detecting means for detecting lateral displacements of the spindle holding means when the wheel is so rotated.