Abstract: With a view to suppressing fretting in a power transmission chain, when a chain straight-line area is seen from a chain widthwise direction W, a flat portion 18 of a first pin 3 of the chain extends in an inclination direction D. A point of intersection P0 is formed by an imaginary line L1 which passes through a center position of an overall height h of the first pin 3 along the inclination direction D intersecting the flat portion. A point of intersection P2 is formed by an imaginary line L2 which passes through a contact portion A0 and which extends in a chain advancing direction X intersecting the flat portion 18 between the point of intersection P0 and one end P1 of the flat portion. When assuming that a distance between the point of intersection P0 and the point of intersection P2 is referred to as h1 and a distance between the point of intersection P2 and the one end P1 of the flat portion 18 is referred to as h2, 0.1·h1?h2.

Abstract: A belt for a continuously variable transmission and elements used in the belt. The elements include a stopper portion formed integrally with a neck portion erected upwardly from a saddle face to hold a width end portion of the ring. The elements are juxtaposed annularly in a same orientation and fastened by rings disposed on a saddle face of the element thereby forming a belt for a continuously variable transmission. A recessed portion is formed by depressing the saddle face at a corner between a side face of the neck portion and the saddle face; and an inner face of the recessed portion includes a first inner face extending smoothly into the side face of the neck portion and having a relatively larger curvature radius, and a second inner face extending smoothly into the first inner face and having a relatively smaller curvature radius.

Abstract: A belt (metal V belt) has a number of elements held by a ring in an endless shape and aligned in a peripheral direction of the ring. The element includes a head portion, a neck portion and a body portion. The body portion has a V face brought into contact with a drive pulley and a driven pulley and left and right locking edge portions wrapped with the ring and disposed on an inner peripheral side of the ring. The head portion is disposed on an outer peripheral side of the ring and having an ear portion extended to left and to right sides to be opposed to the locking edge portion. The neck portion integrally connects the body portion and the head portion. Front faces of the ear portion, the neck portion and the locking edge portion of the element are formed with contact portions capable of bringing the contiguous elements into contact with each other.

Abstract: There are provided a power transmission chain which can improve not only noise level but also durability by eliminating unfavorable combinations from a random arrangement of combinations of pitch lengths and pin shapes by paying attention to maximum bending angle and bending angle minimum value and a power transmission system using the same power transmission chain. With respect to pitch length, links include two types of a link L1 which has a small pitch length and a link L2 which has a large pitch length. With respect to pin shape, pins include two types; a pin P1 of which a curvature of a rolling contact surface is large and a pin P2 of which the curvature of the rolling contact surface is small.

Abstract: To enhance the durability of the V-shaped belt by allowing the strength and the heat-radiating property of the resin blocks to stand together at high levels in the V-shaped belt, which has a plurality of resin blocks and endless connecting members connecting the resin blocks. The V-shaped belt includes a plurality of resin blocks arranged in a direction and an endless connecting member that is impacted into the resin blocks and that extends in the arrangement direction of the resin blocks. Depressions are longitudinally and vertically formed in the upside and downside of the front surface and the rear surface of each resin block. The depressions are separated from the connecting member and are also separated from the lateral surfaces of the resin block.

Abstract: A power transmission chain includes a plurality of links, a plurality of pins, and a plurality of interpieces. By pressing upper and lower edges of the pin into upper and lower edges of a through hole, the pin is connected to the link. The end of the pin which is located at a front end side when the pin is pressed is formed in a shape into which the upper and lower edges of the pin are pressed at the same time.

Abstract: The invention provides a power transmission chain in which abnormal noise can be reduced. In a link, a front through hole 7 and a rear through hole 8 aligned in a chain traveling direction X are provided. A pillar portion 9 is provided between the front through hole 7 and the rear through hole 8. Projecting portions 26, 29 are provided at a central portion in a height direction V of the pillar portion 9, and concave curve portions 27, 28, 30, 31 are provided at both end portions. A pair of flat portions (33,34 and 38,39) are provided on each projection portion 26,29 for restricting an overshoot of the chain. A not-shown pin that is loosely fitted to each of the front through hole 7 and the rear through hole 8 is brought into abutment with corresponding flat portions 27,28,30,31 to restrict an overshoot of the chain 1.

Abstract: An endless metal belt including a ring formed by laminating endless metal plates; and multiple elements continuously attached to the ring. Each of the elements has a body, a head connected to the body by a pillar, and slots formed between the body and the head on left and right sides of the pillar, respectively, for receiving the ring. The elements satisfy the equations (h/t)<1 and (S/h)>40, where h is a width of the slots, t is a plate thickness of the elements, and S is an area of the head.

Abstract: To enhance the durability of the V-shaped belt by allowing the strength and the heat-radiating property of the resin blocks to stand together at high levels in the V-shaped belt, which has a plurality of resin blocks and endless connecting members connecting the resin blocks. The V-shaped belt includes a plurality of resin blocks arranged in a direction and an endless connecting member that is impacted into the resin blocks and that extends in the arrangement direction of the resin blocks. Depressions are longitudinally and vertically formed in the upside and downside of the front surface and the rear surface of each resin block. The depressions are separated from the connecting member and are also separated from the lateral surfaces of the resin block.

Abstract: A power transmission chain includes a plurality of link units which are aligned in a chain advancing direction, and each link unit includes a plurality of link plates which are aligned in a chain width direction W. The plurality of link plates include link plates which are punched out of a material by pressing to first and second specifications. A punching direction of the link plates to the first specification and a punching direction of the link plates to the second specification are made opposite to each other.

Abstract: In a continuously variable transmission metal belt, a lateral-most projecting portion of a side edge of a metal ring assembly wherein each metal ring is located between a radially central plane and a radially inner peripheral surface of the metal ring. A contact point in which the projecting portion abuts against a V-face of a pulley is closer to the radially central plane than to the radially inner peripheral surface. Moreover, as the metal rings are laminated on one another, recesses are formed between the side edges of the adjacent metal rings to retain oil therein, which lubricates the sliding faces of adjacent metal rings and enhances durability of the assembly.

Abstract: A transverse element for a drive belt, includes a recess on either side for at least partially accommodating a ring assembly of the drive belt. The transverse element includes a base part lying radially inside the recesses, a connecting piece lying between the recesses, and a head part lying radially outside the recesses, the base part on either side of the connecting piece being provided with a radially outwardly directed saddle surface for contact with a ring assembly, and between a saddle surface and the connecting piece a notch being provided, in which notch a convexly curved part connects to the respective saddle surface, and in which notch a concavely curved part connects to a respective substantially axially directed side face of the connecting piece. The concavely curved part on either side of a radially most inward lying part thereof has a mutually differing degree of curvature.

Abstract: A belt-type continuously variable transmission (15) includes a primary sheave (29) having a pair of first clamp surfaces (37a, 37b), a secondary sheave (30) having a pair of second clamp surfaces (51a, 51b), and a belt (31) endlessly wound between both the sheaves (29, 30). The belt (31) has contact surfaces (58a, 58b) clamped between the first clamp surfaces (37a, 37b) and between the second clamp surfaces (51a, 51b). Powder (64) having infusibility as a friction enhancing material is held on at least one of the first clamp surfaces (37a, 37b) of the primary sheave (29), the second clamp surfaces (51a, 51b) of the secondary sheave (30), and the contact surfaces (58a, 58b) of the belt (31).

Abstract: A variable speed belt comprising an elastomeric body, a tensile cord disposed within the elastomeric body and extending in an endless direction, a cog extending from the body, the cog comprising opposing flanks, each flank comprises a first planar surface describing an included angle (?), the first planar surface engageable with a sheave, each flank comprises a second planar surface disposed toward a cog tip describing an included angle (?); and included angle (?) is not equal to the included angle (?).

Abstract: Each steel element for a V-belt of a continuously variable transmission has a flank (4a) that comprises a plurality of equally spaced raised portions (41) each being placed between two fine grooves (42). A flat flatness ratio (FR) given by the equation (1) is set to the highest one of values that are capable of practically machining the flank (4a) of the steel element (4) and capable of causing the flank (4a) to exhibit a given and satisfied lubrication oil discharging effect, and a groove pitch (GP) that is a distance between the two fine grooves (42) is set to a value that is capable of practically machining the flank of the steel element and capable of causing the flank to exhibit a given and satisfied lubrication oil discharging effect. The groove pitch thus set is a value that is permitted by the higher value of the flatness ratio thus set.

Abstract: An assembling device, an assembling method and a manufacturing method of a driving belt, which can facilitate fitting of rings into a recess of an element to improve productivity of the driving belt. The driving belt V, in which two rows of rings 8a and 8b are accommodated parallel to each other in a recess 7 of a plurality of elements 1 interlinked annularly in a manner to situate the recess 7 to open to an outer circumferential side, and in which the rings 8a and 8b are held in an inner circumferential side of the protruding portions 9 formed on an opening end of inner walls 6 of the recess 7 to prevent detachment of the rings 8a and 8b from the recess 7, comprises: a ring holding member 8c for restricting a relative movement between the rings 8a and 8b aligned parallel to each other entirely in its length direction without being overlapped.

Abstract: A power transmission chain (1) includes connection members (3; 3A; 4) flexibly connecting corresponding links (2) of a plurality of link rows (52; 52; 53). The connection members (3; 3A; 4) include a first power transmission member (3; 3A) and a second power transmission member (4). The chain (1) includes a module (40; 40A) as a unit element. A moving locus of a contact part (T1; T1A) between the corresponding first and second power transmission members conjunction with flexure between the links (2) defines prescribed curve. The positions of a gravity center (GC; GCA) of the contact part (T1; T1A) and the module (40; 40A) in the chain straight area are space apart by a prescribed distance from each other with respect to an orthogonal direction (V) perpendicular to both a chain advancing direction (X) and a chain width direction (W).

Abstract: A metal V-belt includes a plurality of metal elements supported by a metal ring. The metal ring includes front and rear main surfaces, a pair of left and right slots that receive the metal ring therein, the slots being defined between a saddle surface and an ear-part bottom surface. A protrusion is provided on one of the front and rear main surfaces, and a concavity is provided in the other of the front and rear main surfaces. A clearance defined between an outermost peripheral surface of the metal ring and the ear-part bottom surface of the metal element is set to a value that at an exit of a driven pulley, contact of the innermost peripheral surface of the metal ring with the saddle surface of the metal element, and contact of the protrusion of a succeeding metal element and the concavity of a preceding metal element is avoided.

Abstract: A continuously variable transmission is provided with a drive belt (3) and with a primary pulley (1) and a secondary pulley (2), each including two conically shaped pulley sheaves (4,5) placed on a respective pulley shaft (6,7) and between which the drive belt (3) is held at a variable radial position (R; Rmin; Rmax). The drive belt (3) is provided with transverse elements (32) that are moveable along a circular tensioning element (31) of the drive belt (3), the transverse elements (32) being provided with axially oriented and convexly curved pulley contact faces (40) for arriving into frictional contact with likewise convexly curved outer sheave surfaces (10) of the pulley sheaves (4,5). In this transmission an annular radially inner section (10f) of the outer sheave surface (10) of at least one pulley (1,2) is provided with either a straight or a concave contour as seen in a tangential cross section.

Abstract: A first pin of a connecting member of connecting a plurality of links to each other includes a front portion opposed to a corresponding second pin. The front portion is brought into rolling and sliding contact with the corresponding second pin at a contact portion displaced in accordance with a vibration in a bending angle between the links. A locus of moving the contact portion in accordance with bending the link forms an involute curve INV. A contact region of an end face of the first pin is brought into contact with a sheave face of a pulley by constituting a center by a contact center point. With regard to an orthogonal direction, a distance between a contact center point and a contact portion when the bending angle is zero and a distance between the contact center point and a contact portion when the bending angle is an allowable maximum bending angle are equal to each other.

Abstract: A transmission belt is formed by annularly arranging elements including a plate-shaped first element and a plate-shaped second element, and annularly connecting the elements using a ring. The first element includes a first edge surface on which a burr is formed when the first element is formed by a press operation. The second element includes a second edge surface on which a burr is formed when the second element is formed by the press operation. The first and second edge surfaces face in directions opposite to each other in a direction in which the elements are arranged. The first edge surface includes a first rocking edge that contacts the element adjacent to the first element when the elements are arranged in an arc. The second edge surface includes a second rocking edge that contacts the element adjacent to the second element when the elements are arranged in the arc.

Abstract: A belt guide and an image forming apparatus having the same are disclosed. The image forming apparatus includes a belt supported by supporting rollers and circulates endlessly. A belt guide is disposed on contact portions between the belt and each of the supporting rollers to prevent a separation of the belt from the supporting rollers. The belt guide is formed in a multi-step concave-convex shape, e.g., a staircase-like shape or a square wave shape. Accordingly, a contact area between the belt and the supporting roller is maximized, thereby effectively preventing wear, separation and color mis-registration of the belt due to meandering thereof.

Abstract: Drive belt provided with a continuous band having a radially inwardly oriented surface and a radially outwardly oriented surface, and with an array of plate-like transverse elements engaging the continuous band.

Abstract: A metal belt includes a metal ring assembly formed from a plurality of layered endless metal rings, and a large number of metal elements supported on the metal ring assembly, the metal belt assembly being wound around a pulley and transmitting a driving force. The clearance between adjacent metal rings is set to be in a range from negative to positive from the innermost ring to a middle ring and to be only positive from the middle ring to the outermost ring. Therefore, good lubricating conditions can be maintained by virtue of the clearance being always positive for sliding surfaces of the metal rings from the middle ring to the outermost ring, for which lubrication easily becomes insufficient in the prior art.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contacting plane of the transverse element is shaped by an substantially flat surface, while the inner contacting face of the carrier contacting the contact plane the element has a profiled surface, the combined roughness Ra? of both surfaces being more than 0.6 ?m, preferably over 0.75 ?m. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a boundary lubricating condition, while the lubricating oil is defined to meet the requirements of prohibiting the occurrence of scratch, at least reducing the urging thereof considerably.

Abstract: A production method of a decorative film comprising a step of, in a state in which a transparent resin film is laid on a surface of a laminate sheet in which a pattern layer is placed on one surface of a base film of a thermoplastic resin, inserting the laminate sheet and the transparent resin film into between a pair of endless belts placed opposite each other, thereby obtaining a decorative film, wherein the transparent resin film is preheated by contact with a peripheral surface of a preheat roll urged toward the endless belt, and the transparent resin film is run so as to constantly contact a peripheral surface of at least one guide roll during a period between departure from the peripheral surface of the preheat roll and contact with the laminate sheet.

Abstract: A transverse element for a push belt for a continuously variable transmission comprises a supporting surface for supporting a carrier of the push belt, and a pulley sheave contact surface for contacting pulley sheaves of the continuously variable transmission. A curved transition surface is connected to the supporting surface, whereas a distance surface is located between this transition surface and the pulley sheave contact surface. The distance surface is positioned lower than the supporting surface. When the transverse element collides with a relatively large collision element like another transverse element, protrusions may be developed exclusively on the distance surface. These protrusions are not capable of inflicting damage on a carrier which is to be laid on the supporting surface, because these protrusions do not protrude beyond the level of the supporting surface.

Abstract: A belt for a continuously variable transmission (CVT) includes at least one continuous band supported against a contact face in a slot formed in each of a plurality of transverse elements of the CVT. The band has a surface positioned against the contact face. This surface is coated with chromium nitride by physical vapor deposition to reduce wear.

Abstract: A belt for a continuously variable transmission comprises endless plate-like rings 2 and a plurality of plate-like elements 3, which are placed adjacent to one another and slidably on the rings 2, so that the rings 2 are disposed on the saddle portions 34 of the elements 3, respectively. In each element 3, a first recess 42 is provided at the upper innermost part of each saddle portion 34 such that the first recess 42 is continuous to a corresponding lower side end of the neck portion 33. In addition, a second recess 43 is provided at the lower innermost part of each ear portion 35 such that the second recess 43 is continuous to a corresponding upper side end of the neck portion 33. At least one of the first and second recesses 42 and 43 is in an elliptic arc figure, in a compound arc figure that comprises various circular arcs or in a compound arc figure that comprises an elliptic arc and one or more circular arcs.

Abstract: A pin and an opening in which the pin is fixed have in their cross section straight-line portions and circular arc portions which connect to upper and lower ends of the straight-line portion, respectively. The length LD of the straight-line portion of the pin and the length LL of the straight-line portion of the opening satisfy LL?LD, and the radius RD of the circular arc portions which connect to the upper and lower ends of the pin, and the radius RL of the circular arc portions which connect to the upper and lower ends of the opening satisfy RL<RD.

Abstract: A chain is provided with a plurality of links, and connecting members for connecting those links such that the links are relatively bendable to each other. A first pin of the connecting member is clamped between pulleys thereby to transmit the power between itself and said pulleys. The chain includes a central area with respect to chain width directions, and side areas located on the sides of the central area. In the central area, links adjoining in the chain width directions are pushed to contact with each other, and rotate relative to each other while exerting frictional forces on each other as the chain is bent. In each of the side areas, the links adjoining in the chain width directions are arrayed through a predetermined clearance.

Abstract: At the peripheral edge of a through hole, in which one pin or strip in a link plate is fixed, a compressive residual stress is applied selectively to vicinities of the outer corners of two upper and lower sides confronting in the chain radial direction of said one pin or strip.

Abstract: An element for use in an annular metal belt (1) is disclosed. The annular metal belt (1) transmits torque between two pulleys each having a V-shaped groove. The element has a flank capable of making frictional contact with the V-shaped groove for transmission of torque. A plurality of threads are disposed on the flank substantially in parallel to one another. The threads has a slight height relative to a dimension of the flank, and the top section of each thread is substantially planar.

Abstract: A belt for a continuously variable transmission, and a continuously variable transmission including the same, includes a plurality of clips, each defining a space which defines a groove to which a ring is inserted, thereby reducing slip.

Abstract: A belt type continuously variable transmission includes a drive pulley having a fixed pulley half and a movable pulley half; a driven pulley having a fixed pulley half and a movable pulley half; and a metal belt. The metal belt includes a metal ring assembly having a plurality of endless metal rings laminated on one another and a plurality of metal elements supported on the metal ring assembly. The metal belt is wound around the drive pulley and the driven pulley. The movable pulley half of the drive pulley has a flexural stiffness higher than that of the fixed pulley half of the drive pulley, wherein it is difficult for the edges of the metal ring assembly to contact the metal elements and a V-face of the drive pulley.

Abstract: Driving belt provided with an enclosed tension element and metal transverse elements accommodated so as to be movable in a longitudinal direction along the tension element. The transverse elements each comprise a body part, a head part and a neck part therebetween. On either side of the neck part between the body part and the head part two axially oriented openings are present, for accommodating in each a part of the tension element. The body part includes side contact surfaces oriented substantially in an axial direction and diverging from each other in the radial direction, and with a substantially axially oriented tilting line and in which an upper limit of an opening formed by the head part extends in the axial direction at least to an imaginary line, which extends from the radially lower limit to the radially upper limit of the respective opening in line with a contact surface.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contact plane of both the carrier and the element have a non profiled surface. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a hydrodynamic lubricating condition, while the lubricating oil is defined to meet the requirements of an improved efficiency push belt.

Abstract: A continuously variable transmission belt, including a metal ring assembly including a plurality of metal rings, and a plurality of metal elements which are retained by the metal ring assembly and each has a saddle surface contacted with an inner circumferential surface of the metal ring assembly. The saddle surface includes opposed end peripheries spaced from each other in a traveling direction of the belt and a curved portion located at each of the opposed end peripheries. The curved portion has a range length extending in the traveling direction of the belt and a radius of curvature larger than the range length. The metal element is produced by a method including subjecting a metal sheet to presswork to form a workpiece, subjecting the workpiece to heat treatment and deburring and then to preliminary beveling and subsequent beveling.

Abstract: A production method of a decorative film comprises a first step of laying a base film of a thermoplastic resin on a pattern layer of a transfer sheet in which the pattern layer is placed on one surface of a carrier film, thermally transferring the pattern layer onto the base film, and thereafter stripping off the carrier film, thereby obtaining a laminate sheet in which the pattern layer is placed on one surface of the base film; and a second step of, in a state in which a transparent resin film is laid on a surface of the laminate sheet on the pattern layer side, inserting the laminate sheet and the transparent resin film into between a pair of endless belts placed opposite each other, and conveying the laminate sheet and the transparent resin film under heat and pressure, thereby obtaining a decorative film in which a transparent resin layer of the transparent resin film is placed on the surface of the laminate sheet on the pattern layer side.

Abstract: In a low-vibration V-belt (2), consisting of at least one load carrier (4; 4a, 4b) and a plurality of support elements (6) located thereon, the damping effect is improved. The formation of the damping elements (34) in a radial direction above the central section and in the direction of the width of the belt substantially symmetrical to the axis of symmetry of the support element (6) allows both possible transversal vibrations to be simultaneously damped. The damping elements (34), which consist preferably of elastomer and have high inherent damping properties, can be seated in recesses or bores (36) of the support elements (6). The rear faces of the support elements (6) can have cylindrical counterforms (38), which correspond in shape and position to the convex damping elements (34) located on the respective front faces. The edges of the convex parts (34) have radii or chamfers which permit the corresponding counterparts (34, 38) to engage without force or impact.

Abstract: In a heavy duty power transmission V-belt B formed by engaging tension members 1 and 1 with a plurality of blocks 10, 10, . . . , to prevent as much as possible each block 10 from producing failure at the high-speed running of the belt, a fitting part 12 of each block 10 has an indent 22 formed by upwardly recessing a portion of a resin part 17 located between an upper ridge 14 and an innermost abutment surface 20 of the fitting part 12. Thereby, no edge exists between the innermost abutment surface 20 and the upper ridge 14 so that stress can be distributed. This prevents the occurrence of a crack in the resin part 17 due to stress concentration on the edge, the occurrence of a crack in a reinforcement 18 of each block 10 beginning at the leading end of the crack in the resin part 17, and in turn the fracture of an upper beam 18a of the reinforcement 18, thereby providing enhanced resistance against failure of the block 10.

Abstract: A metal belt for a continuously variable transmission includes many metal elements assembled to an endless metal ring assembly, and is wound around drive and driven pulleys to transmit a driving force. A retainer comprising an endless resilient member deformable radially is disposed between a lower face of an ear of a ring slot in the metal element and a radially outer peripheral surface of the metal ring assembly. When the metal elements are inclined in such a manner that they are fallen forwards in the vicinity of an exit portion of the driven pulley, the metal ring assembly is prevented from strongly interfering with a lower face of the ear and a saddle face by a buffering action provided when the retainer is deformed radially, thereby preventing the wear of the metal belt to enhance its durability without increasing the processing cost for the metal elements.

Abstract: A power transmission belt having a load carrying band with a length, and a plurality of blocks attached to the load carrying band at preselected, spaced intervals along the length of the load carrying band. The plurality of blocks have a thickness (t), measured in a direction along the length of the load carrying band, and a width (W), measured in a direction transversely to the length of the load carrying band. Each of the plurality of blocks is made from synthetic resin material and has no shape-determining insert therein. The synthetic resin material is made from a synthetic resin having a bending modulus of 15 to 20 GPa. The ratio of t/W is from 0.11 to 0.20.

Abstract: A continuous variable transmission belt includes a set of nested metal rings, the set interacting with transverse elements provided slidably along the set, and the rings of the set being accommodated with small mutual play between each pair of adjacent rings, where for at least the majority of the pairs of adjacent rings the nominal value of the play is zero. The innermost and outermost rings having an elasticity modulus significantly lower than the intermediate rings.

Abstract: Belt for a continuous variable transmission, comprises an endless carrier for taking up tensile forces, and a plurality of transverse elements moveable in the longitudinal direction along the carrier. The elements are provided with at least one saddle surface for contacting the carrier. The saddle surface defines an ultimate mutual position of the carrier and the elements relative to each other within the belt in radial direction, with a tapered lower part including a rocking edge and an upper part extending radially above the edge and beyond the carrier, when the carrier and surface are in mutual contact. A thickness of the upper part of a majority of the elements in the longitudinal direction is larger than a largest thickness of the tapered lower part, such that an array of elements pushed against one another within the belt when mutually contacting through their upper parts assumes an arc-like shape.

Abstract: Protrusions formed on an inner peripheral surface of at least an innermost metal ring of a belt for a continuously variable transmission are initially worn. An average contact width w of the protrusions, measured in a direction perpendicular to a direction of travel of the metal ring, is equal to or less than 16 ?m. The development of pitching at a top of the protrusion in a depthwise direction is inhibited. Shallow pitching is eliminated due to the contact between the protrusion and a metal element, which prevents the generation of cracks. When the metal ring and the metal element are conformed to each other, the average Hertz's surface pressure is lowered, whereby the pitching is difficult to occur. Also, the top of the protrusion is worn, leading to an improved surface roughness, whereby the lubrication is enhanced, resulting in an enhancement of metal ring durability.

Abstract: Notched areas are provided on the outer periphery of a flat plate in the coining process to allow material of said plate flow more easily toward the periphery during the coining process. Use of flat plate provides a more economical way of making elements with accurate size and dimensions for continuously variable transmission belt.

Abstract: A composite driving belt provided with a carrier and a plurality of transverse elements assembled slidably thereon, the carrier including one or more bands, preferably composed of a plurality of endless metal bands disposed radially around each other, each element being provided with a radially outward directed carrier contact plane for contacting a radial inner contact plane of the carrier while in operation, wherein the contacting plane of the transverse element is shaped by an substantially flat surface, while the inner contacting face of the carrier contacting the contact plane the element has a profiled surface, the combined roughness Ra? of both surfaces being more than 0.6 ?m, preferably over 0.75 ?m. In particular the roughness and shape of the relevant contacting faces of a belt are adapted to achieve a boundary lubricating condition, while the lubricating oil is defined to meet the requirements of prohibiting the occurrence of scratch, at least reducing the urging thereof considerably.

Abstract: A belt fabric which is provided at a part of a power transmission belt on which frictional forces act is formed by dipping into a rubber solution prepared by dissolving a non cross-linked hydrogenated nitrile rubber composition, mixed with a polyethylene powder having a molecular weight in excess of 1 million and an organic peroxide as a cross-linking agent, in a solvent.

Abstract: A belt drive for a machine for printing images on a flat printing material, having a continuous belt revolving during operation, includes a belt guide having stops for two protruding edges of the belt, the edges being oriented in a longitudinal direction of the belt and opposite one another in a transverse direction of the belt; and a machine for printing images on flat printing material having such a belt drive.