摘要:
A wetting apparatus for offset printing machines comprising a first wetting roller immersed in a pan having dampening solution, a metering roller contacting with the first wetting roller, a second wetting roller contacting with the metering roller and with a printing surface, an ink application roller contacting with the printing surface, an ink receiving roller rotatably in contact with the second wetting roller and movable toward and away from at least one of the metering roller and the ink application roller, a vibrating roller rotatably in contact with the ink application roller, and an ink transferring roller rotatably in contact with the vibrating roller and movable toward and away from the ink receiving roller.
摘要:
A pneumatic radial tire comprising a belt portion disposed between the tread portion and the carcass portion wherein the belt portion is constituted by at least a pair of first belts, a second belt and a third belt which are arranged from radially inward to outward, the first, second and third belts having a first series, second series and third series of parallel cords embedded therein, respectively. The first belts being laterally spaced apart a predetermined lateral space symmetrically with respect to the mid-circumferential centerline and the cords thereof are disposed at an angle of between 40 to 60 degrees with respect to the mid-circumferential centerline. The spaced-apart first belts have opposite lateral ends which are located within less than 5 percent of a belt width of the third belt from the corresponding opposite lateral ends of the third belt, respectively. The first series of the cords of the first belt and the second series of the cords of the second belt are oriented in same directions, while the second series of the cords of the second belt and the third series of the cords of the third belt are oriented in opposite directions with each other.
摘要:
A heavy duty pneumatic radial tire comprises a carcass of a substantially radial construction composed of at least one rubberized ply layer containing cords embedded therein and a belt superimposed about said carcass for stiff reinforcement beneath a tread and composed of at least two rubberized ply layers each containing metal cords embedded therein, said metal cords of which being crossed with each other at a relatively small angle with respect to the circumferential direction of tire, and said tread being provided with a plurality of continuous or discontinuous zigzag circumferential ribs defined along the widthwise direction of tire by at least three, substantially zigzag main grooves extending circumferentially of said tread, said main grooves comprising one or a pair of central circumferential grooves located at a substantially central region of said tread and a pair of outside circumferential grooves defining each of outermost ribs of said tread. In this tire, the central circumferential groove has such a symmetrical cross-sectional shape with respect to a center line of said groove that an inclination angle of a groove wall of said groove with respect to a normal line drawn from an outer surface of said tread and passing an edge of said groove in the cross section perpendicular to said groove wall is made relatively large in a region extending from the groove bottom to at least 50% of groove depth, and the outside circumferential groove has such an unsymmetrical cross-sectional shape with respect to a center line of said groove that an inclination angle of an outer groove wall of said groove in the rotation axial direction of tire is made relatively large and an inclination angle of an inner groove wall of said groove in a region extending from the outer surface of said tread to at least 10% of groove depth is made smaller than that of said outer groove wall.
摘要:
A cleaning device that cleans an ink-supply path of a printer including a plurality of cylinders that constitute the ink-supply path. The cleaning device supplies cleaning solution from a cleaning nozzle to an ink-transfer cylinder in the state where the ink-transfer cylinder is not in contact with an ink-source cylinder, and a blanket cylinder is not in contact with a recording medium. After the cleaning solution is supplied to all the cylinders, a cleaning-solution collecting cylinder is brought into contact with an inking cylinder to collect waste cleaning solution therefrom. A cleaning-solution removing blade removes the waste cleaning solution from the cleaning-solution collecting cylinder.
摘要:
A re-treading method and an apparatus. An image of a zone of the tread material including its cut position is compared with a stored tread pattern image to detect a deviation amount. The tread material or the cut position are moved relative to each other by the deviation amount. The tread material is cut at the cut position after the relative movement. The tread material is wound on a base tire, and the leading and trailing edges of the tread material are united. The tread material or cut position may not be moved relative to each other if the deviation amount is within an allowable range.
摘要:
The uneven wear produced in the tread side rib in the heavy duty pneumatic radial tire is prevented by arranging a peripheral fine groove on a particular region of the side face of the tread portion in a particular form.
摘要:
A main circumferential groove for a pneumatic tire having asymmetrical side walls. One of the side walls has three segments each inclined differently to a line normal to the tread surface. The angle of the inner segment is larger than that of an outer segment.