Abstract: A tire has a tread portion provided with three or four circumferential grooves including a shoulder circumferential groove to form a shoulder land region and a middle land region. The middle land region is provided with a middle circumferential sipe and middle lateral sipes. The shoulder land region is provided with shoulder lateral grooves extending from the shoulder circumferential groove to a tread edge, and shoulder lateral sipes extending from the shoulder circumferential groove and terminated without reaching the tread edge.

Abstract: A tire includes a tread portion including first and second tread edges, three or more circumferential grooves, and four or more land portions. The circumferential grooves include a first shoulder circumferential groove nearest to the first tread edge. Each land portion is provided with only sipes and is not provided with lateral grooves. The land portions include a first shoulder land portion having the first tread edge, and a first middle land portion adjacent to the first shoulder land portion. The first middle land portion is provided with first middle sipes traversing the first middle land portion completely in the tire axial direction. The first shoulder land portion is provided with first shoulder sipes extending from the first shoulder circumferential groove to the first tread edge. The first shoulder sipes have a circumferential pitch length smaller than a circumferential pitch length of the first middle sipes.

Abstract: A tire has a tread portion provided with three or four circumferential grooves including a shoulder circumferential groove to form a shoulder land region and a middle land region. The middle land region is provided with a middle circumferential sipe and middle lateral sipes. The shoulder land region is provided with shoulder lateral grooves extending from the shoulder circumferential groove to a tread edge, and shoulder lateral sipes extending from the shoulder circumferential groove and terminated without reaching the tread edge.

Abstract: A pneumatic tire includes a tread portion including a contact patch which occurs when the tire is mounted on a standard wheel rim with a standard pressure and loaded with a certain tire load at zero camber angle. The contact patch, on a respective tire load, defines a ratio Lc/Ls of a crown contact circumferential length Lc at an axial center of the contact patch to a shoulder contact circumferential length Ls at an axial location of 80% of an axial maximum width of the contact patch. The ratio Lc/Ls upon being loaded with 40%, of a standard tire load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard tire load.

Abstract: A tire is provided in a first half-tread portion with a first shoulder main groove and a first shoulder land region 4D and a first middle land region 4B on the axially outside and axially inside thereof, respectively. The first shoulder land region 4D is divided into first shoulder blocks 7D each provided with a first shoulder chamfer portion 10 at the corner portion 10 between the ground contacting surface and the groove side wall of the first shoulder main groove 3C. Both ends of the first shoulder chamfer portion 10 terminate without being connected to the first shoulder transverse grooves 6D. The first middle land region 4B is provided at the corner 14 between its ground contacting surface and the groove side wall of the first shoulder main groove with first middle chamfer portions 15 each positioned in a part of the range between the adjacent first middle rug grooves 6B. The first middle chamfer portions 15 are disposed so as face the first shoulder chamfer portions 10.

Abstract: A pneumatic tire includes a tread portion including a contact patch which occurs when the tire is mounted on a standard wheel rim with a standard pressure and loaded with a certain tire load at zero camber angle. The contact patch, on a respective tire load, defines a ratio Lc/Ls of a crown contact circumferential length Lc at an axial center of the contact patch to a shoulder contact circumferential length Ls at an axial location of 80% of an axial maximum width of the contact patch. The ratio Lc/Ls upon being loaded with 40%, of a standard tire load is equal to or less than 125% of the ratio Lc/Ls upon being loaded with 70% of the standard tire load.

Abstract: A tire is provided in a first half-tread portion with a first shoulder main groove and a first shoulder land region 4D and a first middle land region 4B on the axially outside and axially inside thereof, respectively. The first shoulder land region 4D is divided into first shoulder blocks 7D each provided with a first shoulder chamfer portion 10 at the corner portion 10 between the ground contacting surface and the groove side wall of the first shoulder main groove 3C. Both ends of the first shoulder chamfer portion 10 terminate without being connected to the first shoulder transverse grooves 6D. The first middle land region 4B is provided at the corner 14 between its ground contacting surface and the groove side wall of the first shoulder main groove with first middle chamfer portions 15 each positioned in a part of the range between the adjacent first middle rug grooves 6B. The first middle chamfer portions 15 are disposed so as face the first shoulder chamfer portions 10.

Abstract: A light beam irradiation apparatus includes a light source, a reflector for condensing light emitted from the light source, and a fiber cable for transmitting light reflected by the reflector. The fiber cable accommodates at least one bundle of optical fibers arrayed at random so that a fiber array at its first end differs from that at its second end. The apparatus further includes a lens, mounted on the second end of the fiber cable, for focusing the light on an object to be treated.

Abstract: Image-transmitting bundled fibers and processes for producing the same in which a bundle of elemental image fibers is assembled without randomizing so as to maintain the picture image without distortion utilizing an inventive assembly technique. The assembled fibers are covered with cladding layer then surrounded by a light-absorbing layer of a disclosed preferred group of materials. Fiber bundles of the invention can have a length of several tens of kilometers while the bundles have a good flexibility and a sufficiently high number of elemental image fibers to convey a clear and satisfactory image.

Abstract: A reinforced glass fiber for use in optical transmission comprising an optical fiber coated with (1) a coating of a first curable organopolysiloxane composition having a refractive index higher than that of the clad glass which forms the outermost layer of the optical fiber, said first curable organopolysiloxane composition being baked, (2) a coating of a second curable organopolysiloxane composition which can be the same as or different from the first curable organopolysiloxane composition, the second curable organopolysiloxane composition being provided on the first curable organopolysiloxane composition and being baked, and (3) optionally a coating of a thermoplastic resin composition.