Abstract: A milling tool includes a cutting tool insert, roughly plate-shaped and having a rake face on an upper face and a flank on a side face and a main cutting edge at an intersection ridge line part at the intersection of the rake face and the flank, fitted in the periphery of a substantially cylindrical holder removably and so that an axial rake angle of the cutting edge ridge line of the main cutting edge is positive. When the cutting tool insert is rotated about the axis of rotation of the holder, the shape of the locus of rotation of the main cutting edge in a section parallel to the axis of rotation is made an approximate circular arc shape swelling outward with progress from the ends to the center.

Abstract: A tire puncture sealant comprises a latex of natural rubber, an emulsion of a tackifier and an antifreezing agent, wherein the tackifier is an aromatic modified terpene resin, and given that the total A+B+C of the solid content A of the natural rubber latex, the solid content B of the tackifier emulsion and the content C of the antifreezing agent is 100 weight %, the solid content A of the natural rubber latex is in a range of from 30 to 60 weight %, the solid content B of the tackifier emulsion is in a range of from 10 to 30 weight %, and the content C of the antifreezing agent is in a range of from 20 to 50 weight %.

Abstract: A puncture sealant supplying/removing apparatus includes a pressure-resistant bottle, an apparatus body on which the pressure-resistant bottle can be mounted, supply hose means which supplies or returns a puncture sealant accommodated in the pressure-resistant bottle to or from a tire, and a high pressure air source. The apparatus body comprises a venturi flow-path having a venturi portion, a first flow-path extending from the venturi portion into the pressure-resistant bottle, and a second flow-path extending from an inside of the pressure-resistant bottle and connected to one end of the supply hose means. The venturi flow-path is provided at its one end with an air intake which is connected to the high pressure air source, the venturi flow-path is provided at its other end with an opening/closing tool capable of opening and closing the other end.

Abstract: A puncture sealing agent for a tire is at least comprising a rubber latex, an adhesive agent, and an antifreezing agent, wherein propylene glycol is used as the antifreezing agent, and further the ratio of the propylene-glycol to the total weight of the puncture sealing agent is set from 20 to 40% by weight.

Abstract: A tire puncture sealant comprises a latex of natural rubber, an emulsion of a tackifier and an antifreezing agent, wherein the tackifier is an aromatic modified terpene resin, and given that the total A+B+C of the solid content A of the natural rubber latex, the solid content B of the tackifier emulsion and the content C of the antifreezing agent is 100 weight %, the solid content A of the natural rubber latex is in a range of from 30 to 60 weight %, the solid content B of the tackifier emulsion is in a range of from 10 to 30 weight %, and the content C of the antifreezing agent is in a range of from 20 to 50 weight %.

Abstract: A device and a method for making a tire puncture sealant having a higher concentration of propylene glycol are disclosed, wherein the device comprises: a container having a cylindrical space for a mixed solution of rubber latex and a tackifier; a squirter comprising at least one spout for pouring propylene glycol on the surface of the mixed solution in the container at a rate of 0.01 to 1.0 liter/minute per spout; and an agitator for the mixed solution in the container, comprising a stirring blade rotatable in the mixed solution to cause said surface a current speed of the mixed solution in a range between about 1.0 and about 10.0 meter/second during pouring the propylene glycol.

Abstract: A tire puncture sealant set comprises a bottle having a body and a threaded neck portion provided with an outlet, a puncture sealant in the bottle, an inside plug put into the outlet, an outer cap screwed onto the neck portion for covering the inside plug, an injector replaceable with the outer cap, a side wall of the body having a triple layered structure of an inner layer, an outer layer and a middle layer therebetween made of a gas barrier resin so that the body is squeezable by hand, the inside plug provided with a breakable partition wall separating the inside of the bottle from the outside, the injector comprising an adapter cap to be screwed onto the neck portion, a sticking pipe for piercing the breakable partition wall into the inside of the bottle, and a hose for injecting the sealant into a pneumatic tire.

Abstract: A puncture sealing agent for a tire is at least comprising a rubber latex, an adhesive agent, and an antifreezing agent, wherein propylene glycol is used as the antifreezing agent, and further the ratio of the propylene-glycol to the total weight of the puncture sealing agent is set from 20 to 40% by weight.

Abstract: A tire puncture sealant set comprises a bottle having a body and a threaded neck portion provided with an outlet, a puncture sealant in the bottle, an inside plug put into the outlet, an outer cap screwed onto the neck portion for covering the inside plug, an injector replaceable with the outer cap, a side wall of the body having a triple layered structure of an inner layer, an outer layer and a middle layer therebetween made of a gas barrier resin so that the body is squeezable by hand, the inside plug provided with a breakable partition wall separating the inside of the bottle from the outside, the injector comprising an adapter cap to be screwed onto the neck portion, a sticking pipe for piercing the breakable partition wall into the inside of the bottle, and a hose for injecting the sealant into a pneumatic tire.

Abstract: A throwaway tip comprises a base which is to be held between a pair of holder pieces of a holder. A cutting edge is provided on a front edge of the base. A pair of holder bearing faces to be respectively brought into abutment against the holder pieces are respectively provided on sides of the base. A rear bearing face to be brought into abutment against a bottom of a pocket of the holder is provided on a rear side of the base. The rear bearing face is substantially orthogonal to the holder bearing faces. Most of a thrust load exerted on the tip during a drilling operation is stably received by the bottom of the pocket.

Abstract: The present invention relates to a throwaway tip of single tip type having an inner cutting edge for cutting a center area of a hole being drilled and an outer cutting edge for cutting a circumference area of the hole, and to a drill holder for holding the throwaway tip. The tip is characterized in that a step gap between a first rake face and a second bearing face on the side of the inner cutting edge are spanned by a first curved surface, and the drill holder is characterized in that a connection surface thereof adjacent to the first rake face is inclined in the same direction as an inclination of the helix of a flute, whereby chip ejection is facilitated.

Abstract: A throwaway tip comprises a base which is to be held between a pair of holder pieces of a holder. A cutting edge is provided on a front edge of the base. A pair of holder bearing faces to be respectively brought into abutment against the holder pieces are respectively provided on sides of the base. A rear bearing face to be brought into abutment against a bottom of a pocket of the holder is provided on a rear side of the base. The rear bearing face is substantially orthogonal to the holder bearing faces. Most of a thrust load exerted on the tip during a drilling operation is stably received by the bottom of the pocket.

Abstract: The present invention relates to a throwaway tip of single tip type having an inner cutting edge for cutting a center area of a hole being drilled and an outer cutting edge for cutting a circumference area of the hole, and to a drill holder for holding the throwaway tip. The tip is characterized in that a step gap between a first rake face and a second bearing face on the side of the inner cutting edge are spanned by a first curved surface, and the drill holder is characterized in that a connection surface thereof adjacent to the first rake face is inclined in the same direction as an inclination of the helix of a flute, whereby chip ejection is facilitated.

Abstract: A pneumatic radial tire and a method for manufacturing the same, a device for forming a band of radial tire, and a method of and device for forming a belt-band-tread rubber assembly. The pneumatic tire including a belt arranged on the radially outer side or a carcass, and a band arranged on the radially outer side of the belt and composed of continuous one to several organic fiber cords wound spirally and approximately parallel to the circumferential direction of the tire. The radial tire manufacturing method including the steps of laminating the predetermined number of belt plies on a belt drum or belt ring for forming a belt, and winding one to several organic fiber cords continuously and spirally in the cicumferential direction of the belt on the outer surface of the formed belt in order to form a band.

Abstract: A drill insert has a polygon plate-shaped body that defines a top face and a central shaft extending substantially perpendicular to the top face. A pair of first cutting edges are formed on the top face in a dot symmetrical relation with respect to the central shaft. A pair of second cutting edges are formed on the top face in a dot symmetrical relation with respect to the central shaft. The second cutting edges are disposed adjacent to the first cutting edges. A projected cutting edge portion is provided in each of the second cutting edges. The projected cutting edge portion outwardly projects from each of the second cutting edges in a radial direction with respect to the central shaft.

Abstract: This invention relates to high-speed radial tires, and more particularly to radial tires wherein the thickness ratio (Gc-Gs)/Gc, that is the ratio of the difference between the crown tread thickness Gc, which is a thickness of the tread on the equator of the tire, and the shoulder tread thickness Gs, which is a thickness of the tread of the ground contact surface at the outer edge in direction of the tire axis, to the crown tread thickness Gc is set to be 0 or more and 0.8 or less. By setting the ratio within a range of 0 to 0.8, the force Fs acting in the radial direction on the tread shoulder part, out of the total load acting to the tire, is decreased, thus, the deformation in the bead part is diminished and the permanence in the bead part can be improved. In a tire having the ratio of 0 to 0.

Abstract: A pneumatic safety tire in which each sidewall portion is provided with a minimum thickness at a position E between an outer edge point A and a 65% height point B both located on each side of the tire equator, where the outer edge points A are defined as the axially outer edges of a ground contacting region on the tread surface in a standard loaded state in which the tire mounted on a regular rim and inflated to a regular pressure is loaded with a regular load, and the 65% height points B are defined as the positions at 65% height of the tire section height H from the bead base in a standard unloaded state in which the tire mounted on the regular rim and inflated to the regular pressure is kept free of load, and further the thickness of each sidewall portion is gradually increased from the minimum thickness position E toward the 65% height point B.

Abstract: A pneumatic radial tire includes a belt arranged on the radially outer side of a carcass, and a band arranged on the radially outer side of the belt and composed of one or more continuous organic fiber cords wound spirally and approximately parallel to the circumferential direction of the tire. A radial tire manufacturing method includes the steps of laminating a predetermined number of belt plies on a belt drum or belt ring for forming a belt, and winding one to several organic fiber cords continuously and spirally in the circumferential direction of the belt on the outer surface of the formed belt in order to form a band. A band forming device includes a device for drawing out a cord to be wound, a device for traversing a let-off device in the widthwise direction of the belt, and a device for controlling the traverse of the let-off device.

Abstract: A radial tire comprises a carcass, a tread thereon, a breaker therebetween, bead cores, and rubber bead apexes, and is characterized in that:(a) the clip width (C1) is smaller than the rim width (C2) of a normal rim for a tire;(b) the carcass (6), in a state of the tire mounted on the normal rim and inflated to a standard pressure, has:an outwardly bulging outer part (21) between the largest width point (D) and a radially outer second point (E2),an outwardly bulging middle part (22) between the largest width point (D) and a inflexion point (F), andan inwardly bulging inner part (23) between the inflexion point (F) and a radially inner first point (E1);(c) the radial height (H2) of the largest width point (D) from the first point (E1) is 50-40% of the height (H1) of the second point (E2);(d) the axial distance (L1) between the largest width point (D) and a third line (X3) is 28-33% of the height (H1); and(e) the axial distance (L2) between the inflexion point (F) and the third line (X3) is 70-55% of the distan