Abstract: There is provided a plate carrier mechanism A having an endless plate belt 3 hung on between a pair of pulleys 2p and 2q spaced from each other, and a blanket carrier mechanism B having an endless blanket belt 5 hung on between a pair of pulleys 4p and 4q spaced from each other, the blanket carrier mechanism B is adapted to be displaceable to a pressure-contacting position Pp or a separating position Pr to the place carrier mechanism A, also, a speed of an outer surface of the plate belt 3 is made greater than that of the blanket belt 5, and the plate carrier mechanism A is of a driving side and the blanket carrier mechanism B is of a driven side, and the plate carrier mechanism A and the blanket carrier mechanism B are connected to each other through a rotation transmitting gear mechanism 6 having a predetermined play which can absorb a difference of the speed of the outer surface of the plate belt 3 and the speed of the outer surface of the blanket belt 5.

Abstract: A blanket belt for use in a printing machine is produced through a producing step including a reinforcement member setting step P1 of setting a reinforcement member 3 onto a mold having teeth shape at an outer circumferential surface thereof, a rubber sheet setting step P2 of setting a green rubber sheet made of a rubber material for use in a blanket, on the reinforcement member 3 set onto the mold, a vulcanizing step P3 of forming teeth T . . . for use in a timing belt on an inner surface thereof by vulcanizing an intermediate produced article obtained on the rubber sheet setting step P2, and obtaining an endless timing belt having the reinforcement member 3 at an inside thereof, and a blanket surface working step P4 of working an outer surface of the timing belt on a blanket surface, after vulcanizing.Thereby, both of expansion and contraction of a blanket surface and a slip thereof to the pulleys are prevented effectively.

Abstract: There are provided an operating mechanism 5 having an operating portion, for example, freely rotatable roller 4, which is displaced to a setting position Ps of pressure-contacting to the plate belt 2 by a spring member 3 and a releasing position Pr spaced apart from the plate belt 2, a fore clamping mechanism 8 supported in a seasaw manner on widthwise supporting shafts 6 . . . disposed on the plate belt 2, and having clamping portions 7c . . . for clamping a fore portion of the plate S at one end thereof, operated portions 7m . . . pressed by the freely ratable roller 4 at the setting position Ps, at the other end thereof, and fore clamps 7 . . . pressed in a clamping direction by spring members 9 . . . , and a rear clamping mechanism 12 supported in a seasaw manner on a widthwise supporting shaft disposed on the plate belt 2 at a rearward of the fore clamping mechanism 8, and having a clamping portion 11c for clamping a rear portion of the plate S at one end thereof, operated portions 11m . . .