Abstract: A method for producing polymer profiles, having a varying thickness over their width and at least one longitudinal side tapering off to form a thin edge, includes of the following steps: Extruding simultaneously a plurality of the polymer profiles through a common die such that the thin edge of each one of the polymer profiles is connected to the thin edge of at least the neighboring one of the polymer profiles to form an interconnected extrudate; in a cross-section of the interconnected extrudate, providing an angle of between 45.degree. and 135.degree. between angle bisectors of neighboring ones of the polymer profiles; and separating the polymer profiles from one another after the step of extrusion.

Abstract: A pneumatic vehicle tire having a carcass that is looped about two bead cores that comprise load-carrying members such as plastic filaments and/or metal wires, with beads in which the bead cores are disposed being capable of turning from a vulcanizing position into an operating position when the tire is being mounted on a wheel rim. In order to improve the tasks of the beads without adversely affecting their ability to turn, the surfaces of the load-carrying members of the bead cores, during turning of the beads prevent adhesion to vulcanized rubber at least to the extent that the load-carrying members are immersed in rubber in the vulcanizing position, so that each load-carrying member is individually rotatable about its longitudinal axis relative to the surrounding rubber of the pertaining bead.

Abstract: A method and apparatus for vulcanizing pneumatic vehicle tires having heads that in the mounted state are disposed on the radially inner periphery of a rim. In order for such tires to achieve a satisfactorily contoured vulcanization, and in order at the same time to produce sealing surfaces with great precision, the tire is vulcanized with its beads in their operating position. During the vulcanization, the radially outwardly disposed surfaces of the tire beads are shaped with the aid of rigid, one-piece, shaped molding rings.

Abstract: A vehicle wheel that includes a valve which has a check device, with the wheel being intended for use with a pneumatic tire that even when operating as a tire which is flat or has otherwise lost pressure permits great distances to be covered at a reduced speed. To prevent misuse of the tire, in other words reinflation of a tire subsequent to flat-tire operation and before the tire has been checked for leaks, the valve is provided with a mechanism that prevents such misuse. This mechanism is pneumatically disposed in series with the check device and is installed in an open position and in such a way that it changes over into a closed position upon commencement of a flat-tire operation, with a special tool and/or special replacement parts being required in order to reestablish the open position of the mechanism.

Abstract: A pneumatic tire for a vehicular tire and wheel assembly that includes a rigid wheel rim, which is provided with essentially radially inwardly extending rim flanges, rim seating surfaces disposed on the radially inner side of the rim ring and inclined in the transverse direction, and a recessed mounting bed for each tire bead, and that also includes a pneumatic tire of elastomeric material, with bead seating surfaces of the tire beads being disposed adjacent to the rim flanges on the rim seating surfaces, and with the carcass of the tire being anchored in the beads by being looped about pressure-resistant bead cores.

Abstract: An apparatus for vulcanizing pneumatic vehicle tires where the tire beads, in the mounted state, are disposed on the radially inner periphery of a rim next to the essentially radially inwardly extending rim flanges. In order to obtain tires having a long service life and tire beads with a good sealing quality, it is proposed that the tire be vulcanized in essentially the proper contour for operation. Two, respectively radially segmented, bead-forming rings that have a variable diameter and can be displaced axially are provided. For the purpose of vulcanizing the sealing surfaces disposed in the interior of the tire so that these surfaces will rest on the rim in an airtight manner, the bead-forming rings are introduced, in a radially retracted state, into the interior of the tire blank, whereby at least one of the tire beads is ovally deformed.

Abstract: A method of producing a pneumatic vehicle tire, the beads of which can be mounted on the radially inner periphery of a rim, and are pivotably relative to the bead cores. A carcass along with the adjacent rubber layers, and the tire beads, with their pull and compression resistant cores, are combined on a drum to form an essentially cylindrical blank. What will later be the insides of the tire initially face radially outwardly, and the interfaces of the initially radially outwardly extending beads form an essentially right angle with the cylindrical surface of the blank. At least the bead regions of the tire blank are preliminarily vulcanized, whereupon the blank is turned in and has imparted thereto a toroidal shape. The blank is then provided with a tread strip, and is final-vulcanized.

Abstract: A method and apparatus for vulcanizing pneumatic vehicle tires where the tire beads, in the mounted state, are disposed on the radially inner periphery of a rim next to the essentially radially inwardly extending rim flanges. In order to obtain tires having a long service life and tire beads with a good sealing quality, it is proposed that the tire be vulcanized in essentially the proper contour for operation. Two, respectively radially segmented, bead-forming rings that have a variable diameter and can be displaced axially are provided. For the purpose of vulcanizing the sealing surfaces disposed in the interior of the tire so that these surfaces will rest on the rim in an airtight manner, the bead-forming rings are introduced, in a radially retracted state, into the interior of the tire blank, whereby at least one of the tire beads is ovally deformed.

Abstract: A method and apparatus for demounting a pneumatic vehicle tire, the beads of which, in the mounted state, are disposed on the radially inner periphery of a wheel rim having a deep mounting bed and, laterally outwardly therefrom, rim flanges which extend essentially radially inwardly. First, a portion of a given tire bead is forced into the deep mounting bed, and subsequently the oppositely located portion of the same tire bead is lifted over the rim flange.