Abstract: In order to enable a rotary press having a plurality of printing units capable of printing on a paper web drawn out of a roller sheet of paper to operate in an increased working efficiency, to be saved in space and to be small sized, there is provided a construction thereof in which a space is provided which is substantially identical to a space that is required to accommodate a single roll of paper of a predetermined diameter, in each of one half or less (3) of the said plurality of printing units; a means (30) is provided for supporting, in the said substantially identical space, a plurality of rolls of paper (W21, W22) each with a diameter that is smaller than the said predetermined diameter, the said means being operable so that the said plurality of rolls of paper may be joined together in succession automatically; and further there is provided, in the said substantially identical space and at a site that is adjacent thereto, a means (50) supported on the said supporting means (30) for joining the said p

Abstract: There is provided a construction which comprises: a printing plate receiving means that is arranged at a position remote from the periphery of a plate cylinder for supporting a printing plate lock-up hook portion in parallel to the axis of the plate cylinder and as capable of displacement in parallel to that axis; a receiving position determining means for positioning at a predetermined position of the printing plate receiving means the printing plate lock-up hook portion mounted thereon; and a stop position determining means for stopping the printing plate receiving means at a predetermined position relative to a side end surface of the plate cylinder. The invention enables a printing plate being locked up to be positioned with an extremely high precision, yet in a short period of time, corresponding to the position where it is to be locked up, relative to an axially displaced plate cylinder.

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: 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: There is provided a construction which comprises: a printing plate receiving means that is arranged at a position remote from the periphery of a plate cylinder for supporting a printing plate lock-up hook portion in parallel to the axis of the plate cylinder and as capable of displacement in parallel to that axis; a receiving position determining means for positioning at a predetermined position of the printing plate receiving means the printing plate lock-up hook portion mounted thereon; and a stop position determining means for stopping the printing plate receiving means at a predetermined position relative to a side end surface of the plate cylinder. The invention enables a printing plate being locked up to be positioned with an extremely high precision, yet in a short period of time, corresponding to the position where it is to be locked up, relative to an axially displaced plate cylinder.

Abstract: In a rotary press comprised of one or more constructional units each including: a plurality of paper feed stations, a plurality of printing stations, a single folding station having a cutting function. An improvement in the or each constructional unit further comprises a first drive source for the folding station and a second drive source separately provided from the first drive source for operating the printing stations and the paper feed stations. In addition, a control apparatus may be provided for controlling both the first drive source and the second drive source so that the folding station and the printing stations may, in the constructional unit, be operated in a matched state.

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 dampening apparatus of a lithographic printing machine in which a dampening train constituted by a roller or rollers is arranged and a dampening liquid is supplied to a printing plate through the dampening train, comprises a spraying mechanism facing a peripheral surface of a roller of the dampening train with a space therefrom and disposed along an axis of the roller, the spraying mechanism containing a plurality of nozzles directing to the peripheral surface of the roller, a cover unit disposed in the space between the spraying mechanism and the roller and having a roller side cover opened and a spraying mechanism side cover closed, the cover unit having a structure extendable and retractable between the roller side cover and the spraying mechanism side cover, and movement adjusting means for adjusting relative movement of the roller side cover and the spraying mechanism side cover so as the spraying mechanism side portion of the cover unit and the spraying mechanism may move close to or apart from the pe

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 printing plate lock-up apparatus for a plate cylinder in a printing press comprises a groove defined in the plate cylinder and having an essentially circular cross section, the groove having an opening end opening to the outer periphery of the plate cylinder and having a width in the circumferential direction smaller than the internal diameter, the opening end having one edge engageable with a turned back edge of the printing plate, an engaging member disposed along the groove and having mating surfaces slidably contacting with the inner periphery of the groove for permitting rotation of the engaging member relative to the groove, the engaging member having an engaging hook engageable with a turned back edge, and having a thickness permitting withdrawal and installation through the opening end, and an operation assembly cooperating with the engaging member for operating the latter to rotate within the groove, the operation assembly maintaining an angular phase of the engaging means at least in the position

Abstract: A printing plate delivery system for a multi-stage printing press, in which a plurality of printing stages are arranged in vertical direction, comprises a vertical transporting device having a carrier movable in vertical direction between a loading position where a printing plate set along the height direction of the printing press being loaded and a printing plate transfer positions at the corresponding height positions to the printing stages for transferring the printing plate, and receiving device provided corresponding to each of the printing stages and cooperated with the vertical transporting device for receiving the printing plate from the carrier at the corresponding transfer position.

Abstract: A guide roller for a printing press is designed to prevent foreign matters, such as ink or so forth from adhering on the peripheral surface thereof and to sweep up the peripheral surface by a traveling web. The guide roller comprises a roller body having a peripheral surface to contact with a traveling web. The roller body incorporates a first peripheral surface for converting the traveling speed of the web into a first rotational speed and a second peripheral surface having a different geometry to the first peripheral surface for converting the traveling speed of the web into a second rotational speed, the second peripheral surface being cooperative with the first peripheral surface for interacting the second rotational speed with the first rotational speed for determining a rotational speed of the guide roller so that the peripheral speed of the guide roller is differentiated from the traveling speed of the web.

Abstract: A paper web threading apparatus for a rotary printing press, which occupies a minimum space required for the installation thereof and which enables automatic threading of a paper web to be conducted smoothly without applying any ineffective tension to the paper web which can be guided along all relevant paper web threading paths. The paper web threading apparatus includes a guide path provided along and laterally of the paper web threading path. A paper web guiding member includes a belt-shaped member having a guided end engaging portion adapted to engage with or secure the guided end of the paper web. A guiding member moving and driving device meshs with the paper we guiding member so as to move the latter along the guide path.

Abstract: A paper web threading apparatus for use in a paper web handling machine includes a paper web threading member movably disposed substantially along a paper web threading path; a driver for driving the paper web threading member; a first signal generator for outputting a signal in response to the movement of the paper web threading member; a processor for receiving the signal outputted by the first signal generator as an input thereof, processing the signal so as to obtain a processed value relating to the speed of movement of the paper web threading member, and comparing the processed value with a reference value preset in connection with the operating speed of the paper web handling machine when the paper web is threaded along its paper web threading path, and then outputting an adjusting signal depending on the result of comparison; and an adjusting device for receiving the adjusting signal outputted by the processor as an input thereof and adjusting the driver so as to vary the speed of movement of the pape

Abstract: A BB-type printing press employing a divided plate cylinder has a novel drive gear train for avoiding rotation in the associated rotating condition and whereby to maintain satisfactory level of sharpness and/or clearness of printed patterns.

Abstract: In a multicolor printing press which has a plurality of printing sections arranged in vertical alignment, the multicolor printing press facilitates adjustment of register position between a plurality of printing sections. The multicolor printing press thus has a first printing section which includes at least one first plate cylinder, and at least one second printing section which includes at least one second plate cylinder. The multicolor printing press is also provided with means for rotatably supporting the first plate cylinder in a fixed register position for providing reference position in adjustment of register position in the second printing section, means for rotatably supporting the second plate cylinder, and adjusting means of register position of said second plate cylinder relative to the reference position defined by the first plate cylinder.

Abstract: In a multicolor printing press which has a plurality of printing sections arranged in vertical alignment, the multicolor printing press facilitates adjustment of register position along the feeding direction of a printing medium. The multicolor printing press comprises a plurality of printing sections arranged in vertical alignment, a plurality of the printing sections each including at least one plate cylinder for transferring printing pattern defined on a printing plate carried thereon to a printing medium on which the printing pattern is to be printed, and means, associated with the plate cylinder, for adjusting rotational phase of the plate cylinder relative to the printing medium for adjustment of register position of the printing pattern on the printing medium.

Abstract: A paper web threading apparatus for use in a paper web processing machine which aims at threading a paper web along a paper web threading path by moving a paper web threading member to which the paper web is secured along a guide member provided along the path, and which comprises detectors for detecting the paper web threading member which is moved along the guide member and outputting a detection signal; and an abnormality indication signal outputting device for outputting an abnormality indication signal when the detection signal is not outputted within a predetermined period of time during the movement of the paper web threading member.

Abstract: An ink fountain apparatus in an ink supply system for use with a printing press. The apparatus comprises an ink reservoir provided with an ink fountain, an ink steering/collecting section formed in a zone of the ink reservoir and in which a screw adapted to stir, transfer and collect ink is rotatively mounted therein, an ink delivery section for delivering ink into the ink reservoir, and a pump installed between the ink steering/collecting section and the ink delivery section. A suction port of the pump is directly connected to an ink collecting zone of the ink steering/collecting section where ink is collected through the action of the screw.

Abstract: An ink feed adjusting apparatus for use in an ink supply equipment that includes a plurality of ink feed adjusting members juxtaposed with one another under a top plate so as to adjust the amount ink supplied by moving each of them towards or away from or bringing each of them into contact with the peripheral surface of an ink fountain roller the adjusting members have through-holes formed in each of them and cover members fitted at least in the respective upper parts of these through-holes.