Abstract: A rotary offset printing press which has a series of printing units of identical make through which a web of paper is threaded. In each printing unit the blanket cylinder is made displaceable into and out of printing engagement with the plate cylinder and the impression cylinder. The cylinders of each printing unit are driven from a separate variable-speed motor via a train of gears which stay intermeshed whether the blanket cylinder is in or out of printing engagement with the other cylinders. A clutch is inserted between the drive linkage and the impression cylinder for connecting and disconnecting the latter to and from the former. A plate change is possible in any of the printing units by moving the blanket cylinder out of printing engagement with the plate cylinder and the impression cylinder, and declutching the impression cylinder from the drive linkage, in that printing unit while the other printing unit or units are in continuous operation for printing the web.

Abstract: An apparatus is operable to print both sides of a web using two sets of ink-jet printers. A first set of printers are aligned horizontally, and so are the second set, with a vertical spacing between the first set and the second set. Paid out from its roll, the web is first fed forwardly past the first set of ink-jet printers so as to be printed on one side thereof, then reversely past the second set to be printed on the other side. The web can be guided solely by parallel rollers without the use of turning bars.

Abstract: An arbitrarily positioned lateral perforation forming apparatus can form a lateral perforation at an arbitrary position or selected position in a continuous web paper at high precision by a simple control system with small control amount. A lateral roulette cylinder projecting a lateral roulette edge on its outer periphery, arranged on one side of the continuous web paper and rotating in a traveling direction of the continuous web paper; and a receptacle cylinder projecting an edge projecting portion opposing to the lateral roulette edge of the lateral roulette cylinder on its outer periphery, arranged on the other side of the continuous web paper, rotating in the traveling direction of the continuous web paper, and forming a lateral perforation in the continuous web paper when the edge receptacle portion opposes the roulette edge; are rotated in synchronism with traveling of the continuous web paper in the drive system.

Abstract: A delivery fan, comprising sets of blades at constant circumferential spacings, receives therebetween the sheets successively falling from an overhead infeed conveyor. The sheets fall off the delivery fan on hitting a set of abutment tines arranged interdigitatingly with the fan blades. A stack of sheets thus formed on a retractable platform is unloaded therefrom onto a delivery conveyor. A temporary sheet holder is provided which is angularly displaceable about the delivery fan axis between a working position, where it temporarily receive the sheets falling off the delivery fan pending unloading of the preformed stack of sheets, and a retracted position where the sheet holder allows the sheets to fall from the delivery fan onto the platform. The sheet holder is mounted to the shaft of the delivery fan via a pair of overrunning clutches and sprung from the retracted toward the working position.

Abstract: In a rotary press, a traveling amount of a paper web is controlled by an infeed system including infeed rolls which feed the paper web to a subsequent stage for an operation such as a printing process. The infeed system of the rotary press includes a traveling amount measuring device disposed on a traveling line of the paper web fed by the infeed rolls for measuring the traveling amount of the paper web in a tension free state and for generating a signal representing the measured result, and a traveling amount controlling device for controlling the traveling amount of the paper web fed by the infeed rolls in response to the signal from the traveling amount measuring device.

Abstract: An arbitrarily positioned longitudinal perforation forming apparatus includes a longitudinal roulette cylinder composed of a first rotary shaft arranged on one side of a continuous web paper and at least one disc-shaped longitudinal roulette edge supported on the first rotary shaft so as to be adjustably positioned in an axial direction of the first rotary shaft. The apparatus further includes a receptacle cylinder composed of a second rotary shaft arranged on the other side of the continuous web paper in parallel relationship with the first rotary shaft and at least one disc-shaped edge receptacle plate supported so as to be adjustably positioned in an axial direction of the second rotary shaft. A projecting edge receptacle portion on the outer periphery of the edge receptacle plate opposes the longitudinal perforation edge of the longitudinal roulette cylinder.

Abstract: An ink jet printer of the type having a plurality or multiplicity of ink jet heads for printing as many characters on a continuous strip of paper or the like traveling between a pair of guide rollers or the like. In order to prevent the strip from fluttering while traveling the elongate distance between the pair of guide rollers, one or more intermediate guide rollers are provided therebetween, in positions offset from a plane tangent to both guide rollers toward one side of the plane opposite to the side where the guide rollers are located. At least two ink jet heads may be provided between every two neighboring pair of guide and intermediate guide rollers.

Abstract: A rotary printing press has a postprinting processing station where the printed web of paper, stretched out between two pairs of nip rollers, is slit longitudinally into a pair of web halves and where the web halves are subsequently superposed one upon the other. This station includes a tension roller for imparting tension to the web being slit, and a set of turnbars for causing a change in the traveling direction of one of the web halves before being placed in register with the other. The tension roller and one of the turnbars are both automatically driven to their working positions with the start of machine operation and retracted when the machine is set out of operation.

Abstract: In a method of making sealed paper, a web of paper is unrolled and fed, while under a given tension, from a paper roll, and is single-folded or multiple-folded. Prior to the or each folding step, the unrolled web of paper is treated by having an adhesive applied to margin portions thereof destined to be margins of the sealed paper on an inner surface thereof other than along a fold line at which the paper is to be folded. The folded web of paper is then cut to yield a number of sealable paper units so treated and folded as above. The method further includes pressing the sealable paper units to have them sealed with the adhesive applied and thereafter discharging the sealed paper units each of which represents a sealed paper. The method may further include printing a given message or information on a sheet of paper before the paper is rolled into the above mentioned paper roll.

Abstract: A turn bar apparatus is incorporated in a rotary press for reversing a web position during running thereof. The turn bar apparatus includes an upstream side turn bar, and a downstream side turn bar disposed along a web running direction. Pull rollers are disposed on an upstream side and a downstream side of the upstream side and downstream side turn bars, respectively. The puller rollers are controlled in such a manner that the peripheral speeds of the pull rollers are faster than a running speed of the web.

Abstract: A tension control system for a web in a form printing press permits arbitrary setting of tensions of a web at respective zones between an impression cylinder and respective rollers. The system includes tension detectors located on the upstream side of an impression cylinder in the printing portion and upstream side of a tension roller in the processing portion, for detecting tension on the web, speed adjusting mechanisms provided at least in respective drive systems of the impression cylinder and the tension roller adjacent to respective tension detectors, for adjusting respective rotation speeds of the impression cylinder and the tension roller on the basis of output signals from controllers, to which detected signals of respective tension detectors are fed back and tension setting devices associated with respective controllers.

Abstract: In a printing apparatus for performing a printing operation on both obverse and reverse surfaces of a continuous web paper with an ink jet printing machine, there is a construction having a first printing unit for printing on one surface of the continuous web paper and a second printing unit for printing on the other surface of the continuous web paper, in which the first printing unit and the second printing unit are arranged at an identical position in respective paths of travel of a first portion and a second portion of the continuous web paper as oriented in parallel to each other, as facing downwards and as shifted to each other in the direction perpendicular to directions in which the first portion and the second portion of the continuous web paper are traveling, and the path of travel of the first portion of the continuous web paper which is printed by the first printing unit and the path of travel of the second portion of the continuous web paper which is printed by the second printing unit are made c

Abstract: A paper folding apparatus for a form printing machine includes an automatic paper cutting device having a cutting cylinder, which is disposed on an upstream side of an oscillatory shooter assembly, and which is adapted to form a cross line of cuts interposed by at least one small uncut portion in a continuous web of paper. The cutting cylinder is synchronously rotated with the paper for forming the cross line of cuts in response to a signal detected according to a predetermined length of travel of the continuous web of paper.

Abstract: The present invention relates to a printed paper folding apparatus comprising: conveyor means provided from the upstream side of a folded paper conveying path located below a folder unit to a folded paper cutting position on the downstream side thereof so as to convey a sheet of printed paper which is folded and discharged by the folder unit in a zigzag fashion; a folded paper separating position indicating device provided along the paper conveying path so as to indicate separating positions at intervals of a predetermined number of folds of the printed paper which is folded and discharged by the folder unit; a folder paper cutting device provided by the cutting position so as to automatically cut the paper, which is continuously conveyed by the conveyor means along the conveying path, into an upstream portion and a downstream portion relative to the conveying path; and a paper sorting device provided near the cutting position so as to automatically sort the upstream portion of the paper from the downstream p

Abstract: A rotary printing machine body is provided with a U-shaped longitudinal portion for mounting an interchangeable drum unit. A pair of left and right interchangeable drum unit moving devices are mounted on the left and right printing machine body frames and adapted to move an interchangeable drum unit resting on a carriage into the mounting portion formed in the printing machine body and to move an interchangeable drum unit from the mounting portion onto the carriage. A pair of left and right fixing devices are also provided for fixing the interchangeable drum unit in the mounting portion to the printing machine body.

Abstract: A method of makeready for a web printing press of the type wherein a web of paper or the like is fed through a print station and a perforating or like processing station driven by first and second drive shaft sections, respectively, which are normally held interconnected via a clutch for joint rotation and which are declutched to allow the print station to operate independently of the processing station. For reconnecting the two drive shaft sections in phase, the method comprises counting the number of revolutions of the first drive shaft section after the same has been declutched from the second drive shaft section, as by a CPU connected to receive electric pulses representative of the revolutions of the first drive shaft section. Upon reception of a clutch engage command from a manually actuable control panel, the CPU computes the additional number of revolutions required for the first drive shaft section before being reconnected in phase to the second drive shaft section.

Abstract: For image registration as in a web fed, multiple color printing press, printing plates are employed each bearing a registration mark having a first line segment extending transversely of the web and a second line segment extending aslantly of the web. The registration marks are so located on the printing plates that their images reproduced on the web are in a row arranged longitudinally of the web and with spacings from one to another. The printed images of the registration marks on the traveling web are sensed optically in order to determine the actual distances between them and between the first and second line segments of each registration mark. The thus ascertained actual distances are converted into corresponding numbers of reference pulses, and these pulse numbers are compared with reference pulse numbers representative of the proper distances.

Abstract: A printing press inking mechanism comprising a fountain roller dipped in a printing ink in an ink fountain, and a drawout roller movable alternately into and out of rolling engagement with the fountain roller and a first of a series of ink rollers for ink transfer from the former to the latter and then to a plate cylinder. The drawout roller when in rolling engagement with the first of the ink rollers can be revolved therewith and so can be automatically cleaned therewith clean of the printing ink by a solvent. The fountain roller has so far been left out of rotation, requiring manual cleaning. Thus a cleaning roller is additionally provided which is movable, at the time of the cleaning of the rollers, into rolling engagement with both the fountain roller and the drawout roller to transmit the rotation of the ink rollers to the fountain roller, so that the fountain roller can also be automatically cleaned with the other rollers.