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公开(公告)号：JPH10244602A
公开(公告)日：1998-09-14
申请号：JP4818097
申请日：1997-03-03
Applicant: BRIDGESTONE CORP
Inventor： INADA NORIO
Abstract: PROBLEM TO BE SOLVED: To improve the uniformity of a tire by joining the rubber-coated fabrics of cord fabric in the warp direction at constant distances by its same sided salvages in the cord width direction during the cutting period, and employing them as a belt-like carcass ply member. SOLUTION: When arranged radially from a pair of beads toward a tread in the direction substantially intersecting with respect to the circumferential direction of tire, the rubber-coated fabric 1 of cord fabric being heat-treated with an adhesive is cut in the warp direction at constant length distances for forming a cut sheet 2. The cut sheet 2 obtained is formed into a belt-like ply by joining them by its selvedges in a manner joining the same sided parts in the cord width direction during cutting, i.e., joining A-A and B-B, and subsequently these are used as a carcass ply member. In this manner, tire can be improved in its uniformity.
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公开(公告)号：JPH06320920A
公开(公告)日：1994-11-22
申请号：JP11485793
申请日：1993-05-17
Applicant: BRIDGESTONE CORP
Inventor： SAWADA HIROKI , INADA NORIO
Abstract: PURPOSE:To improve tire rim assembling and disassembling work abilities and rim fitness by selecting tire bead expanding rigidity E so as to satisfy a fixed computing expression on tire outside diameter D, the maximum width W of the section of a tire side and tire basic rim diameter B. CONSTITUTION:A pneumatic tire where an outside diameter is expressed by D(cm), the maximum width of the section of a tire side by W(cm), and a tire basic rim diameter by B(cm) is formed so that bead expanding rigidity E(kgf/ mm) measured by a bead expanding force test may satisfy the following expression, namely 1
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公开(公告)号：JPH06279591A
公开(公告)日：1994-10-04
申请号：JP7045693
申请日：1993-03-29
Applicant: BRIDGESTONE CORP
Inventor： INADA NORIO
Abstract: PURPOSE:To provide a rubber-reinforcing fibrous material obviating dipping and high-temp. tension heat treatment, a pneumatic tire comprising the fibrous material used as a reinforcing material, and a process for producing the same. CONSTITUTION:A rubber-reinforcing fibrous material is an org. fiber cord made of a poly-phenylenebenzobisoxazole fiber having an elongation of at most 1.5% as measured after it is allowed to stand under a load of one-tenth of the tensile tenacity at break thereof, T(kg), at 100 deg.C for 100min. In the course of production of a raw yarn of the fiber, the fiber is subjected to a surface treatment with a compd. capable of forming a dissociated isocyanate at 140 deg.C or above.
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公开(公告)号：JPH0692106A
公开(公告)日：1994-04-05
申请号：JP26915492
申请日：1992-09-14
Applicant: BRIDGESTONE CORP
Inventor： HACHITANI KAZUO , INADA NORIO
Abstract: PURPOSE:To improve safety of a tire and further to achieve weight reduction of the tire by improving high speed durability and fatigue resistance of a ply reinforcing cord of using superhigh strength nylon fiber, in the pneumatic tire for heavy load use in the pneumatic tire or the like for an aircraft. CONSTITUTION:In a pneumatic tire for use of heavy load reinforced by a polyamide fiber cord, the polyamide fiber cord has 9.0g/d or more strength, to obtain a sulfur amount of rubber, in which the cord is buried, in a range of 1.0 to 4.0 pts.wt relating to 100 pts.wt. diene rubber and 100% modulus of rubber in a range of 25 to 60kg/cm .
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公开(公告)号：JPH05286304A
公开(公告)日：1993-11-02
申请号：JP9522792
申请日：1992-04-15
Applicant: BRIDGESTONE CORP
Inventor： KODAMA SUNAO , INADA NORIO
Abstract: PURPOSE:To remove the bad workability of a cap band layer cord, tire deformation and the break of the cord and improve high speed durability by making the cap band layer cord and aliphatic polyamide fibre cord whose total denier is of a specific value, making residual tension per width that is expressed by a specific expression, that of a specific value. CONSTITUTION:The cord of the cap band layer 6 of a pneumatic radial tire 1 is made to be an aliphatic polyamide fibre cord whose total denier is 500-3000, and which is of a pair-ply structure and has a low ply number. A ply coefficient NT which is expressed by NT=TX(0.139XD/2X1/rho) X10 , is made to be 0.1-0.3, and residual tension F which is expressed by FW=FXEX the number of member sheets, is made to be 85kgf-400kgf. Here, NT is a ply coefficient, T is a ply number (frequency/10cm), D is total denier, and rho is specific gravity. Also, FW is residual tension per cap band layer cord right after picking from a tire center portion, and E is the placed number of cap band layer cords per 5cm in a tire width direction.
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Patent Agency Ranking
公开(公告)号：JPH05193306A
公开(公告)日：1993-08-03
申请号：JP26303592
申请日：1992-09-04
Applicant: BRIDGESTONE CORP
Inventor： WATANABE ATSUSHI , INADA NORIO
Abstract: PURPOSE:To reduce a weight and prevent standing wave, together with cuts and peel-off of an aircraft radial tire by uniformly embedding cords of specified angles against the tire equatorial surface in respective inner and the outer side belt plies provided on the side close to a carcass layer of a belt and a tread rubber. CONSTITUTION:Inner and outer side belt plies 41, 42 are formed on the side close to a carcass layer 31 of a belt layer 40 and a tread rubber 36, and a cord 46 which crosses a tire equatorial surface E at an angle A in range from 5 to 15 degrees and extending zigzag in the circumferential direction, is embedded uniformly inside of the inner belt ply 41. Moreover, a cord 51, having a crossing angle B against the tire equatorial surface E bigger than A, is embedded uniformly in the outer side belt ply 42. thus weight of an aircraft radial tire can be reducel and generation of cuts and peel-off can be checked while occurrenece of a standing wave is prevented.
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公开(公告)号：JPH04108003A
公开(公告)日：1992-04-09
申请号：JP22236090
申请日：1990-08-27
Applicant: BRIDGESTONE CORP
Inventor： ONIKI TORU , KIKUCHI MICHITSUGU , INADA NORIO
Abstract: PURPOSE:To realize weight reduction without spoiling cut resistive ability or weatherability in sidewall parts by setting construction materials of fiber for a carcass ply cord to be used, its strongly ductile physical property value, its count, a certain relationship between side thicknesses and a range of cord diameter, under specific conditions. CONSTITUTION:A radial tire has one sheet of carcass ply layer in which fiber cords are arranged at an angle in a range from 90 degrees to 75 degrees in the circumferential direction of the tire. In this case, the fiber cords are formed from aromatic polyamide fiber or highly strong polyvinyl alcohol fiber (hereinafter referred to as PVA fiber) having more than 14g/d of raw yarn strength. The cords taken out from the tire are set so as to satisfy an equation I. In the equation, Tb shows rupture strength (kg), and Eb shows rupture elongation (%), N shows a count (number/5cm) in a crown center part, and S shows a sidewall total gauge (mm) in the thinnest part of the tire sidewall. Furthermore, cord diameter D is set below 0.6mm.
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公开(公告)号：JPH03208704A
公开(公告)日：1991-09-11
申请号：JP91490
申请日：1990-01-09
Applicant: BRIDGESTONE CORP
Inventor： IWASAKI SHIZUO , INADA NORIO
Abstract: PURPOSE:To improve manoeuvering stability, riding comfortableness and durability by adopting PVA fiber of high hot water resisting property having high strength and high elastic modulus as cord material for at least one of two or more belt reinforced layers, and specifying prescribed characteristics as well as arrangement specifications. CONSTITUTION:PVA fiber cord embedded in rubber of at least one of two belt reinforced layers 3, 4 provided in a tire satisfies a relation of 12(S X T) + 1,000U > 28,000, wherein S(kg) represents strength of the cord, U(%) an elongation percentage at breakage of the cord and T a count number per 5 cm in a crown center part. Similarly, a diameter of the cord L(mm) and the count number per 5 cm T coincide with a relation of (L X T)/50 X 100 dyn/cm dyn/cm , and hot water resisting property at 140 deg.C or more are provided thereto.
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公开(公告)号：JPH01314743A
公开(公告)日：1989-12-19
申请号：JP32477888
申请日：1988-12-24
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , NISHIKAWA TOMOHISA , INADA NORIO
Abstract: PURPOSE:To provide the subject tire having improved decomposition resistance by amine, good high speed durability and good reclamation durability by reinforcing with organic fiber cords having a specific polyester/polyamide core-sheath structure. CONSTITUTION:Organic fiber cords constituting a carcass supply layer 4 are composed of cords produced by twisting organic fibers having a polyester/ polyamide core-sheath structure. The intrinsic viscosity of the polyester forming the core portion is >=0.8 and the ratio of the weight of the core portion to that of (the core portion + the sheath portion) is 0.3-0.9. The cords are embedded in an embedding rubber containing >=50% of polyisoprene to form a carcass supply layer, thereby remarkably improving the amine decomposition resistance of the organic fiber cords.
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公开(公告)号：JPH0120081B2
公开(公告)日：1989-04-14
申请号：JP5255683
申请日：1983-03-30
Applicant: BRIDGESTONE CORP
Inventor： IMAI ISAMU , OOSHIMA KAZUO , TANAKA KENICHI , INADA NORIO
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