Abstract: An inking pump for an offset printing press has a cylinder defining a bore in which a plunger is received for both rotation and linear reciprocation, creating a first and a second opposed fluid chamber. The cylinder has formed therein a first and a second suction port with a spacing therebetween axially of the bore, and, angularly spaced 180 degrees from the suction ports, a first and a second discharge port with an axial spacing therebetween. The plunger has formed in its surface a first recess for placing the first fluid chamber in successive communication with the first suction port and the first discharge port during each complete revolution of the plunger, and a second recess for placing the second fluid chamber in successive communication with the second suction port and the second discharge port during each complete revolution of the plunger.

Abstract: A jaw device for rotary-press folding section provided on a jaw cylinder in which the a continuous paper web guided in between a cutting cylinder and a folding cylinder is guided along the outer periphery of the folding cylinder, with the leading edge thereof held by a holding mechanism provided on the folding cylinder and wound around the outer periphery of the folding cylinder by the rotation of the folding cylinder, cut to a predetermined length with a cutting mechanism; the cut paper sheet being guided to an appropriate position along the outer periphery of the folding cylinder; the leading edge of the cut sheet being released from the held state and caused to protrude into the jaw cylinder with an insertion blade, thereby the cut sheet being folded by gripping the insertion blade and the cut sheet caused to protrude by the insertion blade; the folding section jaw device comprising an opening provided on the outer periphery of the jaw cylinder in parallel with the axial line, and a jaw proper comprising a

Abstract: An inking pump for an offset printing press has a cylinder defining a bore in which a plunger is received for both rotation and linear reciprocation, creating a first and a second opposed fluid chamber. The cylinder has formed therein a first and a second suction port with a spacing therebetween axially of the bore, and, angularly spaced 180 degrees from the suction ports, a first and a second discharge port with an axial spacing therebetween. The plunger has formed in its surface a first recess for placing the first fluid chamber in successive communication with the first suction port and the first discharge port during each complete revolution of the plunger, and a second recess for placing the second fluid chamber in successive communication with the second suction port and the second discharge port during each complete revolution of the plunger.

Abstract: A jaw device for rotary-press folding section provided on a jaw cylinder in which the a continuous paper web guided in between a cutting cylinder and a folding cylinder is guided along the outer periphery of the folding cylinder, with the leading edge thereof held by a holding mechanism provided on the folding cylinder and wound around the outer periphery of the folding cylinder by the rotation of the folding cylinder, cut to a predetermined length with a cutting mechanism; the cut paper sheet being guided to an appropriate position along the outer periphery of the folding cylinder; the leading edge of the cut sheet being released from the held state and caused to protrude into the jaw cylinder with an insertion blade, thereby the cut sheet being folded by gripping the insertion blade and the cut sheet caused to protrude by the insertion blade; the folding section jaw device comprising an opening provided on the outer periphery of the jaw cylinder in parallel with the axial line, and a jaw proper comprising a

Abstract: A plurality of pump units are juxtaposed for conjointly metering ink to an offset printing press. Each pump unit has a piston slidably received in a cylinder having formed therein a suction port and a discharge port at circumferential spacings. Conventionally pressure-tightly closed at one end, the cylinder has the piston projecting from the other end thereof. The projecting end of the piston is coupled to a drive motor via a drive linkage such that the piston both rotates and linearly reciprocates with each complete revolution of the motor for drawing ink into the cylinder through the suction port and forcing it out through the discharge port. A cylinder end seal is provided for sealing said other end of the cylinder against the leakage of the printing ink.

Abstract: In a printed matter transport device wherein a printed matter is gripped by a gripping mechanism of a chain and made to travel along a guide rail, to improve the durability of the guide rail and chain, to prevent misalignment, falling out and damage when an external force acts on the printed matter, to improve durability of a connecting part of a chain link (base) and the gripping mechanism, to reduce manufacturing costs, and to enable the printed matter to be firmly gripped. A chain with grips comprising first rollers respectively arranged on two sides in the center of the longitudinal direction of the bases, a second roller on one side perpendicular to the common center line of the first rollers and a grip mechanism on the opposite side, a guide rail, a chain drive means and a cam member, a guide rail, a chain drive means and a cam member are provided.

Abstract: A signature-delivery-pitch regulating apparatus includes a grip mechanism adapted to grip a signature received in a rotating delivery fan, push the signature out of the delivery fan, and then release the signature on the transport conveyer operating at a speed slower than the moving speed of the grip mechanism. The grip mechanism includes at least one endless chain in meshing engagement with at least a first sprocket and a second sprocket. The first sprocket rotates at a position within a rotation locus of bottoms of signature receiving spaces of the delivery fan and in the vicinity of a region where the delivery fan comes close to the transport conveyer. The second sprocket has an outer circumference located outside the rotation region of the delivery fan. The endless chain can travel along the transport direction of the transport conveyer from a position inside the rotation region of the delivery fan to a position outside the rotation region of the delivery fan.

Abstract: A printing unit drive apparatus for a rotary press which includes a single or plural printing units and a single or plural folding units. The drive apparatus includes a motor capable of driving a driven portion of each unit, a connection mechanism for drivingly connecting the motor with the driven portion, and a brake mechanism and a reduction gear mechanism disposed in the connection mechanism. All or some of the motors are selectively combined and operated in a synchronized manner. When supply of electricity to the motors is stopped, the motors stop simultaneously without continuing their independent inertial rotation.

Abstract: A rotary press has a paper web supply apparatus, a printing apparatus, and a post-printing processing apparatus. The rotary press further includes at least one heating roller provided in a path along which a paper web carrying printed images runs from the printing apparatus to the post-printing processing apparatus, as well as at least one cooling roller provided downstream from the heating roller. The heating roller and the cooling roller are disposed such that the running paper web contacts each of the rollers over at least one-fourth of the circumference thereof. The heating roller is rotated at a circumferential speed different from a running speed of the paper web. The heating roller is a cylindrical body equipped with a built-in coil to which alternating current is supplied. The heating roller has cavities which are formed in a mutually communicating manner in the wall thereof and are filled with a thermal medium, and the outer surface of the heating roller is roughened.

Abstract: An offset perfecting press is disclosed which has a pair of blanket cylinders on opposite sides of a web traveling along a predefined path. Bearing different images to be printed, two plate cylinders are disposed in circumferentially spaced apart positions on each blanket cylinder. Each plate cylinder is independently movable between an image transfer position, where the plate cylinder is held to the blanket cylinder in order to print an image thereon for subsequent transfer to the web, and an image nontransfer position where the plate cylinder is spaced from the blanket cylinder. Only one plate cylinder is held in the image transfer position on each side of the web. For a change from one image to another, the plate cylinders that have been printing the opposite sides of the web are retracted to the image nontransfer positions, and the other plate cylinders, rotating in phase with the blanket cylinders, are moved to the image transfer positions. There is no need for stopping the web or the blanket cylinders.

Abstract: Disclosed is an ink furnishing apparatus in a lithographic printing press with a keyless system which performs printing by furnishing a relatively high viscous ink and dampening water to printing plates on a plate cylinder. A first shearing force is exerted on the ink upon drawing out the ink deposited on a peripheral surface of a fountain roller through a first gap between an ink fountain and the peripheral surface of the fountain roller by rotation of the fountain roller, and a second shearing force is exerted on the ink due to a difference of peripheral speeds of the fountain roller and a first intermediate roller upon transition of the ink from the peripheral surface of the fountain roller to the peripheral surface of the first intermediate roller across a second gap between the peripheral surface of the fountain roller and the peripheral surface of the first intermediate roller, thus, water is separated from the ink.

Abstract: An ink furnishing apparatus is capable of furnishing relative high viscosity ink in keyless ink furnishing. The apparatus operates in such a manner that an ink drawn from an ink fountain by rotation of a fountain roller and having a thickness corresponding to a first gap is supplied to the peripheral surface with compression by passing through a second gap, is provided fluidity by compression and disrupter through contact between the peripheral surfaces of an uneven surface roller and an intermediate roller and contact between the peripheral surfaces of the intermediate roller and a metering roller for supplying to the peripheral surface of the metering roller, the excess amount of ink on the peripheral surface of the metering roller is scraped off by a doctor means and returned to the ink fountain for supplying substantially uniform amount of ink at any axial position of the metering roller to a printing plate on a plate cylinder via the peripheral surface of the form roller.

Abstract: An ink furnishing apparatus for a printing press for performing printing by furnishing an ink to a printing plate on a plate cylinder is selectively operable in an entire surface ink furnishing mode, in which a first gap is held fully opened, the doctor means is placed in contact with the metering roller, ink drawn through the fully opened first gap in a thickness corresponding to the first gap by rotation of the fountain roller, is furnished in an excess amount of ink onto the peripheral surface of the metering roller, the extra amount of ink on the peripheral surface is scraped off by means of the doctor means contacting with the peripheral surface of the metering roller to return to the ink fountain, and the ink is furnished onto a printing plate in a plate cylinder via the peripheral surface of the form roller in substantially uniform amount over the entire position along the axis of the metering roller, and in a local ink furnishing mode, in which the first gap is adjusted to be narrower with respect to

Abstract: A pump unit for a printing machine comprises a base member and a plurality of pumps incorporated in the base member. Each of the pumps comprises a cylinder mounted to the base member and provided with a main bore closed at one end thereof and extending in an axial direction of the cylinder member and with suction and discharge ports, a plunger fitted in the main bore of the cylinder so as to always close another end of the main bore and to be reciprocal and rotatable therein, a variable speed motor mounted to the base member having an output shaft, and a transmission mechanism disposed between the plunger and the variable speed motor for transmitting an output of the variable speed motor to the plunger member. The transmission mechanism comprises an arm member mounted to the output shaft of the variable speed member and a connection member coupled at one end to the plunger member and at another end to the arm member through a spherical bearing.

Abstract: A roller changer of this invention is disposed in a machine the rollers of which must be changed, such as in a rotary press. The roller changer includes manipulators disposed on a movable machine table, for handling rollers to be changed, a roller support unit disposed either integrally with, or separately from, the machine frame in such a manner as to exist inside the operation zone of the manipulators at least when the manipulators handle the rollers to be changed, and capable of supporting thereon the rollers to be changed, and a control unit for controlling at least the operation of the manipulators.

Abstract: The present invention relates to a roll core holding device equipped with a roll core release mechanism which can facilitate to automatically and certainly release the empty roll core from a rotary printing machine. The roll core holding device for each end of a roll core comprises a shifting means; a center member capable of shifting owing to the shifting motion of the shifting means and consisting of a base section and a shaft section protruded from the base section; a plurality of pawls capable of shifting along the shaft section of the center member, arranged so as to widen the space between the pawls as they are shifted toward the base section; an urging means for the pawls toward the top of the shaft section; and a stopper secured at the top of the shaft section of the center member.

Abstract: The present invention relates to a roll core holding device equipped with a roll core release mechanism which can facilitate to automatically and certainly release the empty roll core from a rotary printing machine. The roll core holding device for each end of a roll core comprises a shifting means; a center member capable of shifting owing to the shifting motion of the shifting means and consisting of a base section and a shaft section protruded from the base section; a plurality of pawls capable of shifting along the shaft section of the center member, arranged so as to widen the space between the pawls as they are shifted toward the base section; an urging means for the pawls toward the top of the shaft section; and a stopper secured at the top of the shaft section of the center member.