Patent application number | Description | Published |
20090065123 | METHOD FOR MANUFACTURING PNEUMATIC TIRE - Provided is a method of manufacturing a pneumatic tire, which is capable of reducing tire failure without leading to reduction in productivity, the method including: folding a cylindrical film made of thermoplastic resin or thermoplastic elastomer composition into a sheet shape; stacking rubber layers on both surfaces of the folded film in a manner that the rubber layers protrude from both edge portions of the film; forming a laminate by cutting protruding parts of the rubber layers into rubber protruding portions each having an amount of protrusion (h) in a range from 3 mm to 20 mm; expanding the laminate into a cylindrical shape and fitting the laminate onto a tire making drum; pressing down each rubber protruding portion toward the surface of the drum by use of a pressure roller; pasting other components of a tire onto the laminate to form an uncured tire; and curing the uncured tire. | 03-12-2009 |
20090211674 | NON-PNEUMATIC TIRE - Provided is a non-pneumatic tire in which buckling can be prevented without a weigh increase of the tire, the non-pneumatic tire including a spoke structure. The non-pneumatic tire is characterized in that, in the non-pneumatic tire where a spoke structure obtained by circumferentially arranging spokes intermittently at intervals, which radially couple together annular cylindrical outer member and cylindrical inner member, is joined to an inner peripheral side of a tread ring, at least some of a plurality of spaces each formed between two spokes adjacent to each other in the tire circumferential direction each have an air-containing structure. | 08-27-2009 |
20090320983 | PNEUMATIC TIRE AND PROCESS FOR PRODUCING THE SAME - A pneumatic tire in which, in employing as an air-impermeable layer a film formed of a thermoplastic resin or a thermoplastic elastomer component obtained by blending a thermoplastic resin with an elastomer, separation of the film during tire production is prevented; and a process for producing the same. The pneumatic tire is obtained by disposing a film closer to a tire cavity than a carcass layer, disposing a first rubber layer closer to the tire cavity than the film so as to cover the film, and disposing ends, in the width direction, of the first rubber layer outward of ends, in the width direction, of the film, the film being formed of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer. | 12-31-2009 |
20100108221 | PNEUMATIC TIRE AND PROCESS FOR MANUFACTURING THE SAME - A pneumatic tire and a process for manufacturing the same which enable, in the use of a film of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending an elastomer in a thermoplastic resin as an air permeation preventive layer, formation of the air permeation preventive layer excelling in gas barrier performance, and molding of the tire through a simple molding operation without generating any unnecessary scraps. For the pneumatic tire of the present invention, a cylindrical molded article composed of a film of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending an elastomer in a thermoplastic resin is crushed into a sheet-like laminate; and the sheet-like laminate is used as the air permeation preventive layer. In the manufacturing operation, the sheet-like laminate is wrapped around a making drum so that an unvulcanized tire having the sheet-like laminate as an air permeation preventive layer is molded, and the unvulcanized tire is vulcanized. | 05-06-2010 |
20100126647 | PNEUMATIC TIRE - A pneumatic tire using as an air permeation prevention layer a film consisting of thermoplastic resin or thermoplastic elastomer composition obtained by blending thermoplastic resin with elastomer, wherein the film is prevented form being peeled off to prevent entry of a release agent into the interior and the internal view of the tire is improved. An air permeation prevention layer ( | 05-27-2010 |
20100314030 | MANUFACTURING METHOD FOR PNEUMATIC TIRE - Provided is a manufacturing method for a pneumatic tire including the steps of: shaping a cylindrical film formed of a thermoplastic resin or a thermoplastic elastomer composite in which a thermoplastic resin is blended with an elastomer, folding the film into a sheet shape, laminating rubber layers on both surfaces of the folded film, opening the laminate of the film and the rubber layers into a cylindrical shape, fitting the laminate thus opened on a tire making drum, forming the tire pneumatic tire including the film as an air permeation preventing layer, and curing the uncured tire. In the method, when the rubber layers are laminated on the both surfaces of the folded film, positions of the rubber layers in a width direction are displaced from each other such that an end portion of one of the rubber layers is arranged to protrude from an end portion of the film and an end portion of the other one of the rubber layer is arranged on an inner side, in the width direction, of the protruding end portion of the one of the rubber layers, and the protruding end portion of the one of the rubber layers is caused to cover the end portion of the other one of the rubber layers in a state where the laminate is fitted on the tire making drum. By employing the manufacturing method for the pneumatic tire, troubles due to a splice portion of the rubber layers can be reduced. | 12-16-2010 |
20110000603 | METHOD OF FORMING TIRE INNERLINER AND METHOD OF PRODUCING PNEUMATIC TIRE - A method of forming a tire innerliner and a method of producing a pneumatic tire according to the present invention suppresses occurrence of an air pocket and avoids complicating the structure of a tire building machine. | 01-06-2011 |
20110240193 | NON-PNEUMATIC TIRE AND METHOD OF MANUFACTURING SAME - A non-pneumatic tire with spokes easily mountable on and dismountable from a wheel. In the non-pneumatic tire ( | 10-06-2011 |
20120073722 | PNEUMATIC TIRE - A pneumatic tire including a carcass layer wherein reinforcing cords are arranged in a tire circumferential direction and ends thereof in a tire width direction extend to bead cores disposed in bead portions of both sides; and a belt layer including a layer provided on an outer side in a tire radial direction of the carcass layer. A range, inward in the tire width direction of ends of the belt layer in the tire width direction, is not less than 5% and not more than 95% of a maximum dimension of the belt layer in the tire width direction; and a carcass strength coefficient K of the carcass layer defined by the formula [carcass strength coefficient K (N/mm·kPa)]=[reinforcing cord count (cords/mm)]×[reinforcing cord strength (N/cord)]×[number of carcass layers]÷[maximum air pressure (kPa)] is such that 0 (N/mm·kPa)03-29-2012 | |
20120318421 | NON-PNEUMATIC TIRE TIRE/WHEEL ASSEMBLY - A non-pneumatic tire tire/wheel assembly including a tire main body | 12-20-2012 |
20130025763 | PNEUMATIC TIRE - Disclosed is a pneumatic tire comprising (A) reinforcing layer comprising a plurality of reinforcing cords or wires coated with a rubber composition, wherein (B) a film layer, (C) an elastomer layer, and (D) a film layer comprising ethylene-vinyl alcohol copolymer are sequentially laminated on the tire inner surface side of reinforcing layer (A), and the product of Young's modulus Eb (MPa) and thickness Gb (mm) of film layer (B) is equal to or more than 5 kN/m, wherein the reinforcing layer having improved durability. | 01-31-2013 |
20130042962 | PNEUMATIC TIRE AND PROCESS FOR MANUFACTURING THE SAME - A pneumatic tire and process for manufacturing the same enable, in the use of a film of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending an elastomer in a thermoplastic resin as an air permeation preventive layer, formation of the air permeation preventive layer excelling in gas barrier performance, and molding of the tire through a simple molding operation without generating any unnecessary scraps. For the pneumatic tire, a cylindrical molded article composed of a film of a thermoplastic resin or thermoplastic elastomer composition obtained by blending an elastomer in a thermoplastic resin is crushed into a sheet-like laminate; and the laminate is used as the air permeation preventive layer. In the manufacturing operation, the sheet-like laminate is wrapped around a making drum so that an unvulcanized tire having the sheet-like laminate as an air permeation preventive layer is molded, and the unvulcanized tire is vulcanized. | 02-21-2013 |
20130126064 | METHOD FOR PRODUCING PNEUMATIC TIRE AND PNEUMATIC TIRE - Disclosed is a method of producing a pneumatic tire in which a green tire having a layer of film having a thermoplastic resin as a main component, and an uncured rubber layer provided thereon is cured. When the uncured rubber layer is formed on the film layer, at least one uncured rubber strip is applied serially onto the film layer to form the uncured rubber layer. | 05-23-2013 |
20130269852 | PNEUMATIC TIRE - A pneumatic tire which uses, as an inner liner layer, a laminated sheet obtained by laminating an air permeation preventing layer, made of any one of a thermoplastic resin and a thermoplastic elastomer composition containing a blend of the thermoplastic resin and an elastomer, and a tie rubber layer, and which has high durability to prevent development of a crack in the tie rubber layer that occurs around a splice portion of the laminated sheet after the tire starts to be used. In the pneumatic tire, a sagged portion is formed by a concavo-convex structure in the air permeation preventing layer at least between points P and Q in a shape that a length La of a straight line connecting points P and Q and a length Lb of the air permeation preventing layer actually passing through points P and Q satisfy a relationship of (1.03×La)≦Lb≦(1.5×La). | 10-17-2013 |
20140041780 | PNEUMATIC TIRE - A pneumatic tire includes: an air permeation preventive layer disposed in the inner surface of the tire; a belt layer buried in a tread part; and a cord layer formed by arranging a plurality of cords. The cord layer is disposed between the air permeation preventive layer and the belt layer, and extends to a bead part side further from a tire maximum width position. At least a part of the cord layer is located close to the outer surface of the tire, at a position closer to the bead part side than the tire maximum width position, so that the distance between the cords and the outer surface of the tire is not more than 2 mm. | 02-13-2014 |
20140116595 | PNEUMATIC TIRE - A pneumatic tire uses, as an inner liner layer, a laminated sheet obtained by laminating a tie rubber layer and an air permeation preventing layer made of any one of a thermoplastic resin and a thermoplastic elastomer composition containing a blend of the thermoplastic resin and an elastomer, and has excellent durability making it possible to prevent the tie rubber layer from being cracked around a splice portion of the laminated sheet after the tire starts to be used. The pneumatic tire also can include, in addition to the laminated sheet, a perforated portion penetrating the air permeation preventing layer that is formed within a range of 25 mm, on at least either side in a tire circumferential direction, from a cavity-side end A of a splice portion of the air permeation preventing layer. | 05-01-2014 |