Abstract: The purpose of the present invention is to provide an ink-feeding roller capable of making the thickness of the supplied ink film to be uniform and thin, and a manufacturing method therefore. For this purpose, the present invention is an ink-feeding roller (13), which is supported between an ink fountain roller (12) and an ink roller (14) so as to be capable of reciprocating movement and which supplies ink from the ink fountain roller (12) to a plate cylinder (21) via the ink roller (14) by bringing the ink-feeding roller alternately in contact with the ink fountain roller (12) and the ink roller (14). A helical groove (13a) is provided on the outer circumference thereof according to the pattern position and pattern area on the printing plate of the plate cylinder (21).

Abstract: A sheet-fed offset rotary printing press includes one plate cylinder, one blanket cylinder with the same size as that of the plate cylinder, one impression cylinder, one plate making device, four inking devices, four roller throw-on/throw-off devices, and a cylinder throw-on/throw-off device. At least one plate is mounted on an outer surface of the plate cylinder. The blanket cylinder opposes the plate cylinder, and at least one blanket is mounted its outer surface. The impression cylinder has at least one gripper device for holding a paper sheet. The plate making device can inscribe four printing patterns on four regions of the plate. The inking devices individually supply inks to the four printing patterns of the plate on the plate cylinder through four ink form rollers. The roller throw-on/throw-off devices throw on one ink form roller onto corresponding one printing pattern of the plate and throw off the remaining ink form rollers from the remaining printing patterns.

Abstract: A printing press includes a printing unit, a plate making unit, and a control unit. The printing unit has a plate cylinder. The plate making unit is provided in the printing unit and performs plate making for a plate mounted on an outer surface of the plate cylinder. The plate making unit is supported to be movable between an operative position where it performs plate making while closing at least part of the printing unit, and a wait position where it opens at least part of the printing unit. The control unit selectively operates the printing press at a first speed at which normal printing is performed and a second speed lower than the first speed. The control unit serves to enable the printing press to operate at the first speed when the plate making unit is located at the operative position, and disable the printing press to operate at the first speed when the plate making unit is not located at the operative position.

Abstract: A printing press includes a plate cylinder, a plate making unit, and a detection unit. The plate cylinder is rotatably supported by a frame and has an outer surface on which a plate is mounted. The plate making unit is supported to be movable between an operative position where plate making is performed and a wait position to escape from the operative position to perform plate making for the plate. The plate making unit has an exposure unit and a support mechanism for supporting the exposure unit to be movable in an axial direction of the plate cylinder. The exposure unit has a head which irradiates the plate with a laser beam to print an image on the plate. The detection unit detects a position of the exposure unit with reference to the frame.

Abstract: A printing press includes a plate cylinder, a plate making unit, and an adjuster. The plate cylinder is rotatably supported by a frame and has an outer surface on which a plate is mounted. The plate making unit performs plate making for the plate mounted on the plate cylinder. The plate making unit has a support member supported by the frame and an exposure unit. The exposure unit is supported by the support member to be movable in a direction to come close to and separate from the outer surface of the plate cylinder, and has a head which irradiates the plate with a laser beam to print an image on the plate. The adjuster is supported by the plate making unit to be detachable to adjust a position of the exposure unit with respect to the support member.

Abstract: A printing press includes a plate cylinder, a plate making unit, a detection switch, and a control unit. The plate cylinder has an outer surface on which a plate is mounted. The plate making unit performs plate making for the plate mounted on the outer surface of the plate cylinder. The plate making unit is supported to be movable between an operative position where plate making is performed and a wait position to escape from the operative position. The detection switch detects the plate making unit positioned at the wait position. The control unit controls plate change operation in accordance with a detection output from the detection switch.

Abstract: A printing press includes a plate cylinder, a plate making unit, at least one first engaging member, a first regulating member, a second engaging member, and a second regulating member. The plate cylinder is rotatably supported by a frame and has an outer surface on which a plate is mounted. The plate making unit is supported to be movable between an operative position where plate making is performed and a wait position to escape from the operative position. The first engaging member is fixed to one of the frame and the plate making unit. The first regulating member is fixed to the other of the frame and the plate making unit to engage with the first engaging member, and the first regulating member has a recess extending in an axial direction of the plate cylinder. The second engaging member is fixed to one of the frame and the plate making unit, and the second regulating member is fixed to the other of the frame and the plate making unit to engage with the second engaging member.

Abstract: A printing press includes a printing unit, a plate making unit, and a control unit. The printing unit has a plate cylinder. The plate making unit is provided in the printing unit and performs plate making for a plate mounted on an outer surface of the plate cylinder. The plate making unit is supported to be movable between an operative position where it performs plate making while closing at least part of the printing unit, and a wait position where it opens at least part of the printing unit. The control unit selectively operates the printing press at a first speed at which normal printing is performed and a second speed lower than the first speed. The control unit serves to enable the printing press to operate at the first speed when the plate making unit is located at the operative position, and disable the printing press to operate at the first speed when the plate making unit is not located at the operative position.

Abstract: A printing press includes a plate cylinder, a plate making unit, and an adjuster. The plate cylinder is rotatably supported by a frame and has an outer surface on which a plate is mounted. The plate making unit performs plate making for the plate mounted on the plate cylinder. The plate making unit has a support member supported by the frame and an exposure unit. The exposure unit is supported by the support member to be movable in a direction to come close to and separate from the outer surface of the plate cylinder, and has a head which irradiates the plate with a laser beam to print an image on the plate. The adjuster is supported by the plate making unit to be detachable to adjust a position of the exposure unit with respect to the support member.

Abstract: A printing press includes a plate cylinder, a plate making unit, at least one first engaging member, a first regulating member, a second engaging member, and a second regulating member. The plate cylinder is rotatably supported by a frame and has an outer surface on which a plate is mounted. The plate making unit is supported to be movable between an operative position where plate making is performed and a wait position to escape from the operative position. The first engaging member is fixed to one of the frame and the plate making unit. The first regulating member is fixed to the other of the frame and the plate making unit to engage with the first engaging member, and the first regulating member has a recess extending in an axial direction of the plate cylinder. The second engaging member is fixed to one of the frame and the plate making unit, and the second regulating member is fixed to the other of the frame and the plate making unit to engage with the second engaging member.

Abstract: A printing press includes a plate cylinder, a plate making unit, a detection switch, and a control unit. The plate cylinder has an outer surface on which a plate is mounted. The plate making unit performs plate making for the plate mounted on the outer surface of the plate cylinder. The plate making unit is supported to be movable between an operative position where plate making is performed and a wait position to escape from the operative position. The detection switch detects the plate making unit positioned at the wait position. The control unit controls plate change operation in accordance with a detection output from the detection switch.

Abstract: A printing press includes a plate cylinder, a plate making unit, and a detection unit. The plate cylinder is rotatably supported by a frame and has an outer surface on which a plate is mounted. The plate making unit is supported to be movable between an operative position where plate making is performed and a wait position to escape from the operative position to perform plate making for the plate. The plate making unit has an exposure unit and a support mechanism for supporting the exposure unit to be movable in an axial direction of the plate cylinder. The exposure unit has a head which irradiates the plate with a laser beam to print an image on the plate. The detection unit detects a position of the exposure unit with reference to the frame.

Abstract: A paper conveying apparatus for a sheet-fed press includes a shaft, a gripper shaft, a plurality of grippers, a gripper pad, levers, a rod, a slide member, rollers, and cam plates. The shaft has two ends pivotally supported by a pair of frames. The gripper shaft extends parallel to the shaft and swings upon pivotal movement of the shaft. The plurality of grippers are aligned on the gripper shaft. The gripper pad extends to be parallel to the gripper shaft and swings upon pivotal movement of the shaft. The grippers and the gripper pad grip the end portion of a sheet conveyed from upstream a paper conveying direction by cooperation thereof, and convey the sheet to a cylinder downstream the paper conveying direction. The levers, the rod, the slide member, the rollers, and the cam plates reciprocally move in the axial direction of the shaft to flex the central portions of the gripper pad and gripper shaft in the paper conveying direction.