Abstract: A vehicle wheel having a one-piece rim and being provided for a pneumatic belted tire. The seats for the tire beads are located on the radially inner surface of the rim. In order to assure trouble-free emergency operation of the tire in the event of damage or a defect, on the rim and/or on the tire, structures are provided which, at least in the region of the support surface of the tire, effect a disengagement of the tire beads from the rim seats during a loss of air pressure, and which prevent an only periodic return of the tire beads to the seats while driving.

Abstract: A vehicle wheel and pneumatic tire assembly, including a tire which essentially comprises rubber or rubber-like synthetic material, and a rigid rim which on the radially inner periphery of the rim ring has seating surfaces for the tire, from where the tire walls initially extend essentially horizontally toward the outside. On the radially inner periphery, the rim ring is provided with support surfaces for supporting the tire during an emergency operation. In order to be able to transmit increased forces during an emergency operation, the inner wall of the tire, in the region of the tread, and the radially outer portions of the rim, are provided with raised portions and recessed portions which predominantly extend in the transverse direction, and which are adapted to engage in one another during an emergency operation of the tire.

Abstract: A wheel and tire assembly for a vehicle, including a solid rubber tire, and a wheel body, one or both edges of which are provided with a circumferential groove for receiving a retaining ring for the solid tire. In order to be able to repeatedly mount the solid tire with a sufficiently reliable seating, there is inventively proposed to provided the solid tire with a base having a width such that when the retaining ring is omitted, the tire extends slightly into the region which would otherwise be occupied by the retaining ring. Accordingly, when the retaining ring is inserted, the base of the tire must be slightly elastically deformed, thus assuring a secure seating of the tire on a wheel rim therewith.

Abstract: A pneumatic vehicle tire which has fine slits in the tread. These slits are inclined relative to the circumferential direction of the tire. In order to increase the frictional connection to the roadway, to make the wear of the tread more uniform, and in addition to be able to use mechanically stiff plates for the associated vulcanization molds, the fine slits are twisted about an at least approximately radially extending twist axis. The fine slits preferably extend continuously from their roots into the tread surface region proper.

Abstract: A valve for wheels for pneumatic tubeless bicycle tires. The wheel has a wellbase or drop-center rim and a valve opening in the base of the wellbase for such a valve. For simple installation of the valve, the valve body is provided on the outlet end with a cylindrical projection, the outer dimensions of which correspond to the inner dimensions of a valve opening recess, so that in the installed state the valve body has a surface which is flush with the base of the wellbase of the rim.

Abstract: A covering ring for a vehicle wheel. The bead seating surfaces of a tire are mounted on the radially inner periphery of the rim. In order to prevent dirt and/or water from entering the space between the tire bead and the rim well, the covering ring has a width which covers the space between the tire bead, that portion of the rim which extends axially outwardly from the rim well, and the rim well. Also, provision is made that the radially inner surface of the covering ring, when viewed in the transverse direction, extends horizontally or is laterally inclined toward the outside. Also, provision is made that the radially inner diameter of the covering ring at no point of the space, which is to be covered, be greater than the radially inner diameter of the mounted tire in the bead region.

Abstract: An extruder head for producing flat cohesive profiled strips from resilient mixtures of differing composition, such as mixtures of rubber or synthetic material, and especially for manufacturing uncured tread strips for pneumatic tires having a two-ply central portion and two similar edge portions. The extruder head includes two extruders which are disposed at an acute angle next to or above one another, and feed a common extrusion nozzle via a preform die or member having flow channel which extend one above the other. The extruder head also has a third extruder which conveys the mixture for the edge portions and is connected to the preform die at a greater angle than are the aforementioned extruders.

Abstract: A variable-volume receptacle, especially for use as a compensating receptacle in heating systems. The receptacle includes two membrane-like sheets of rubber or synthetic material; the sheets have the same surface areas, and are placed against one another. The edges of the sheets are bound together by a peripheral U-shaped strip which is attached to both sides. The novel edge connection is considerably more durable than the conventional overlap connection, and as a result of not being susceptible to the otherwise constant danger of tearing due to having been folded, the connection also has a much longer life than do the heretofore known overlap connections.

Abstract: A pneumatic tire, the tread of which is provided with zigzagged grooves. In order to keep rocks or similar solid foreign objects from getting stuck in the tread recesses, and in order to have these rocks drop out of the tread when the associated tire axis pivots, the side faces or the zigzagged grooves are stepped. Furthermore, the step faces, which extend approximately transverse to the circumferential direction of the tire, are disposed at an incline to a plane which extends through the main axis of the tire. Side faces which merge into one another via a given step face are parallel to one another, yet are staggered relative to one another by the width of this step face. The step faces are upwardly inclined at approximately 15.degree. to 25.degree..

Abstract: A sealing profiled strand of elastomeric materials provided with sealing lips along portions of the strand. The strands emerge from the nozzle or orifice of the extruder, at which point they still have a complete cross section. While still in the plastic state, the strands are cut by a transversely movable cutting knife which is curved in conformity to the outer contour of the strand. The strand is cut pursuant to a prescribed pattern in such a way as to remove portions of the sealing lip.

Abstract: A method of mounting a tire on a rim. Contemplated are vehicle wheels having rims where the seats for the tire beads are disposed along the inner periphery of the rim respectively next to a radially inwardly extending rim flange. The rims also have circumferential recessed portions which are disposed next to the seats and which have a base with a diameter which is greater than the diameter of the seats. The following method steps are involved. The rim and the tire are moved toward one another, with their axes of rotation being disposed at an angle to one another. The rim is introduced into the tire, at least one bead portion of which has assumed an oval shape. The rim is rotated. A portion of one of the beads, the seat of which extends parallel to the rim seat, is intorduced into the recessed portion of the rim. Subsequently, the rest of that bead is inserted. After the same procedure is repeated for the other bead, the tire is inflated with air, so that the beads are brought onto the rim seats.

Abstract: A filling gas for a tire having one or more hollow chambers, especially vehicle tires with a body of rubber or rubber-like material having suitable reinforcement inserts. Sulfur hexafluoride (SF.sub.6) is used as the filling gas, which can also be a mixture of sulfur hexafluoride and one or more other gases, such as air. The tire hollow chamber, in comparison to the air, contains a greater quantity of sulfur hexafluoride. The ratio of air quantity to the quantity of sulfur hexafluoride is in the range of approximately 1:1 to 1:8.5. A relief or venting conduit is provided that extends into the vicinity of the highest location of the tire hollow chamber. Optionally, the rim breakthrough or valve leading to the tire hollow chamber is closed or sealed off. The valve for filling the tire hollow chamber, and the venting device may be arranged as a combined unit with respect to the rim body.

Abstract: A rubber mixture is provided for direct bonding to metal surfaces, and includes a base of natural and/or synthetic rubber which contains fillers, processing aids, vulcanizing agents, a bonding agent in the form of a phenol, or derivatives thereof, which form phenolic resins with formaldehyde, a source of formaldehyde, and metallic compounds, preferably oxides of metals, the outer electron shell of which has 2s electrons. The metallic compounds are present in a measured quantity which is about 30 to 400 mMol above the conventional dosage of 40 to 60 mMol for activating the polymerization, with this measured quantity being applicable to each 100 g of rubber. The measured quantity of bonding agent ranges from two to four times the conventional quantity of 40 mMol per 100 g rubber.

Abstract: A pneumatic vehicle tire having a belt and a radial carcass. Located laterally outwardly in the bead region are end portions of the carcass ply or plies which are guided upwardly, i.e. radially outwardly. Bead reinforcers are also provided. In order to achieve a great dynamic resilience along with sufficient stiffness of the bead regions, it is proposed pursuant to the present invention that the filaments of the bead reinforcers, and the strength carriers of the end portions of the carcass, be disposed at opposite inclines relative to the radial direction. Furthermore, in the vicinity of their outer ends, these filaments and strength carriers form a smaller angle with the circumferential direction of the tire than do those portions thereof in the bead core region, so that these reinforcing inserts are thus disposed in such a way that they extend in a curved manner.

Abstract: An extruder which serves for kneading and extruding rubber and synthetic material mixtures. The extruder is equipped with a rotatably mounted screw, and pin bodies which project into the interior of the housing. These pin bodies can be damaged, and in particular can be bent or even broken. In order to quickly determine these failures, and possibly to even determine deformed pin bodies, the latter are incorporated into an electrical monitoring circuit. The pin bodies are provided with electrical inserts which influence the monitoring circuit when deformations or breakage of the pin bodies occur, in order in this way to transmit a signal or even electrically switch off the extruder. In place of the electrical inserts, photo conductors can be used, the optical conductivity of which can be utilized for determining the aforementioned damages.

Abstract: A tread configuration for motor vehicle tires, especially spare tires, with several peripheral rows of essentially V-shaped blocks, with the points of successive blocks, as seen in the peripheral direction of the tire, alternately pointing in opposite directions transverse to the circumferential or peripheral direction of the tire. Three rows of blocks are provided, and are separated from each other by linearly extending peripheral grooves. The width of the two outer rows correspond essentially to the axial dimension of a block; in the middle row, the successive blocks are laterally displaced or offset with respect to each other in such a way that the width of this middle row is approximately 1.3 to 1.8 times the axial dimension of a block individually.

Abstract: A tread structure for pneumatic tires, especially for motor vehicles, having two circumferential ribs which include essentially rectangular blocks; these blocks are arranged sequentially one after the other in the circumferential direction of the tire, and are separated from each other by S-shaped fine slits. Several circumferential main grooves extend in a zig-zag manner in such a way as to form angles of 90.degree.. Respective separating grooves separate the tread from the sidewalls of the tire. Three main grooves are provided which enclose the two circumferential ribs of essentially rectangular blocks. The central main groove is located in the zenith portion of the tire; the outer main grooves are respectively connected with the adjacent separating grooves by transverse grooves which are disposed at a slight incline to the transverse direction. The tread profile depth is at most 5 mm.

Abstract: A multi-layer printing blanket having a reinforcing section as a substructure which is composed of one or more fabric layers with rubberized layers disposed therebetween, and having a cover which can include a compression layer, a fabric layer, and a top or cover layer. A thin rubberized coating is worked-in on that side of the reinforcing section remote from the cover. This rubberized coating is composed on the basis of such a rubber type which is as swell-resistant as possible against water, conventional solvents, and colors or inks employed in connection with the printing blanket.

Abstract: A tread configuration for pneumatic vehicle tires, especially for spare tires. A number of recesses are arranged in succession and next to each other in the circumferential direction of the tire. Transverse ribs and substantially circumferential ribs separate the recesses from one another and have a width which is approximately 1/4 to 3/4 of the circumferential dimension of the recesses. The radially outwardly located peripheral surface of the tire is subdivided into several segments. Within each of the segments, the circumferential dimension of the recesses and of the transverse ribs is constant, and the circumferential dimension of the recesses and of the transverse ribs is different in successive segments. The recesses are of such a cross-sectional shape or outline that at least one boundary line thereof is formed by an edge of a transverse rib. At least some of the circumferential ribs extend at an angle to the circumferential direction of the tire.

Abstract: A pneumatic vehicle tire of elastomeric material has a radial carcass and a pull-resistant belt which is located between the carcass and the tread, and extends approximately over the width of the tread. The belt includes at least two cord fabric plies. A rubber layer is arranged at least partially between two of these plies and has a thickness in a range from the diameter of the cords of the belts to 5 mm. Furthermore, in the central region of the belt, the rubber layer located between the belt plies is considerably softer than are those portions of the rubber layer located in the vicinity of the two edge regions of the belt. The two harder portions of the rubber layer, which harder portions are arranged laterally of the softer central portion, project beyond the belt on both sides.