Mitsuboshi Belting Ltd.

Mitsubishi Belting Ltd.

Masahiko Kawashima

Kyoichi Mishima

Koji Kitahama

Toshimi Kumazaki

Shinji Aono

Yuji Okiyoshi

Osamu Miyajima

A power transmission belt having a body with a length, inside, and outside, and laterally spaced side surfaces. The body has a compression section, with there being a plurality of fibers embedded in the compression section having a diameter of 0.7 to 0.9 denier.

Power transmission belt

An apparatus and method for forming at least one of a rib and groove on a surface of a power transmission belt/belt sleeve. The apparatus has first and second supports on which the belt/belt sleeve can be mounted for movement in an endless path. First structure is provided on at least one of the first and second supports for reinforcing a belt/belt sleeve, mounted on the first and second supports, against movement and deformation of the belt/belt sleeve relative to the at least one of the first and second supports transversely to the endless path as the belt/belt sleeve moves in the endless path.

Apparatus and method for forming ribs on a belt/belt sleeve

A double V-ribbed belt having a body with an inside, an outside, a length, and laterally spaced sides. At least a first rib is exposed on the inside of the body and extends in a lengthwise direction. At least a second rib is exposed on the outside of the body and extends in a lengthwise direction. A substantially inextensible layer resides between the first and second ribs. Laterally extending reinforcing fibers are provided in the body on at least one of the inside and outside of the inextensible layer, with the concentration of reinforcing fibers on the inside of the inextensible layer being different than the concentration of reinforcing fibers on the outside of the inextensible layer.

Double V-ribbed belt

A method of forming a power transmission belt including the steps of: providing a belt sleeve defining an axis and having a rubber layer with elongate fibers embedded therein and extending generally parallel to each other in a first line; rotating the belt about its axis; providing a grinding element for cutting the rubber layer and fibers to define ribs with oppositely facing flanks; and urging the rotating belt sleeve and grinding element, one against the other in first and second steps and, as an incident thereof, causing the grinding element to define the oppositely facing flanks. The belt sleeve and grinding element are urged one against the other transversely of the first line at a first speed during the first step and at a second speed different than the first speed during the second step.

V-ribbed belt and method of fabricating the same

A power transmission belt having an inside surface and an outside surface. The power transmission belt has: a compression section defining a plurality of laterally spaced, longitudinally extending ribs made at least partially of rubber; a plurality of discrete, laterally extending reinforcing fibers in the ribs; a tension section outside of the compression section and defined at least partially by a rubber layer; and a plurality of discrete, laterally extending reinforcing fibers in the rubber layer of the tension section. The length of the reinforcing fibers in the rubber layer of the tension section is greater than the length of the reinforcing fibers in the ribs.

V-ribbed belt

A power transmission belt having a belt body defining laterally spaced, oppositely facing flank surfaces for engagement with a pulley and at least one fiber within the belt body and extending in a lateral direction. The fiber has a cross-sectional area taken transversely of its length and a surface exposed at at least one of the flank surfaces. The exposed fiber surface is flared to have an area that is greater than the cross-sectional area of the fiber.

V-ribbed belt having protruding fibers

A power transmisison belt having: at least one longitudinally extending rib having laterally spaced, first and second oppositely facing surfaces for reception within a complementary pulley groove; at least one fiber embedded in the one rib and having a length extending transversely to the longitudinal extent of the one rib, with the fiber having a portion projecting outwardly from the one rib beyond one of the first and second surfaces; and a noise suppressing material applied to the one of the first and second surfaces and a portion of the one fiber to inhibit noise generation between a power transmission belt and a cooperating pulley resulting from relative movement of one against the other.

Growing community of inventors

Hyogo, Japan

Masahiko Kawashima