Abstract: A guide apparatus is composed of a guide plate which is disposed in such a manner as to be able to move between an active position located within the sheet transfer space and a retreat position where the guide plate does not interfere with the sheet transferring from the collect cylinder to the jaw cylinder; a position-changeover drive unit for moving the guide plate between the active position and the retreat position; a printing-speed detection unit for detecting the driving speed of a rotary press and outputting a driving speed signal during printing; and a control unit for outputting, upon reception of the driving speed signal from the printing-speed detection unit, a position changeover signal to the position-changeover drive unit in order to move the guide plate accordingly.

Abstract: A pump for a printing press includes a plunger accommodated within a main bore of a cylinder to be rotatable and reciprocatable and having a cutaway portion at its distal end, and a constant-speed motor for rotating and reciprocating the plunger. The plunger and the output shaft of the motor are radially offset relative to each other and inclined with respect to each other. The output shaft of the motor is coupled to the plunger via a transmission mechanism which includes an arm and a connection member. The arm is connected to, for example, the plunger, and the connection member is connected to, for example, the output shaft of the motor. The arm and the connection member are connected with each other at an eccentric position in such a manner that the arm and the connection member can displace relative to each other in the radial direction and can change the intersecting angle therebetween.

Abstract: In a rotary press intended to perform the synchronous control of driving means with high precision, quickly stabilize rotation, and reduce spoilage caused by phase shifts, comprising a plurality of printing mechanisms in which driving means M rotate N turns while plate cylinders P rotate one turn, so that printing images can be printed on a paper web sequentially passing through each printing mechanism in such a manner that the printing images are matched with a predetermined reference, in which a control section 3 replaces the rotational phase of the plate cylinder with the rotational phase of the driving means M corresponding to that rotational phase so as to match the printing images with a predetermined reference, converts a shift between the rotational phase of the driving means M for matching and the rotational phase of the driving means M in a normal state into the number of outputs of the first pulse signals, set it as a correction value, and obtains a virtual feedback value by shifting the rotational

Abstract: A rotary printing press control method receiving a drive reference from a master control section, generating a phase correction based on dividing a length between a printing unit and a folding unit by an outer peripheral length of a printing cylinder of the printing unit, generating a drive reference speed signal based on the drive reference, generating a corrected drive reference phase signal obtained by correcting a drive reference phase based on the drive reference with the phase correction, generating a feedback speed signal and a feedback phase signal based on the operating condition of the printing unit, generating a phase difference signal based on a phase difference between the corrected drive reference phase and the feedback phase signal, and correcting the drive reference speed signal and the feedback speed signal to control a drive for the printing unit.

Abstract: A paper-web guide apparatus includes a guide member having a vibration guide surface which is curved about an axis and is adapted to guide the paper web toward a desired direction, and a vibration excitation unit for vibrating the guide member about the axis to thereby generate ultrasonic torsion vibration on the vibration guide surface. The vibration guide surface may be further displacable about the axis, and a displacement drive unit for displacing the curved vibration guide surface about the axis may be provided. When the vibration excitation unit is operated, the guide member is twisted about the axis and thus ultrasonic torsion vibration is generated on the curved vibration guide surface. As a result, antinodes and nodes of vibration appear on the curved vibration guide surface, whereby frictional resistance between the paper web and the curved guide surface decreases.

Abstract: A method of manufacturing an orifice member used in a nozzle for ink-jet printing includes a first step of applying an adhesive onto one surface of a synthetic resin member; a second step of forming at least one through-opening in a metallic member such that the through-opening extends in a direction perpendicular to the direction of penetration of the through-opening; a third step of bonding together the metallic member having the through-opening and the synthetic resin member via the adhesive; and after the bonding step, a fourth step of forming a plurality of through-holes having substantially the same diameter in a portion of the synthetic resin member corresponding to the through-opening of the metallic member such that the through-holes are aligned at a substantially constant pitch along the through-opening of the metallic member and such that the through-holes do not deviate from an area corresponding to the through-opening.

Abstract: A printing cylinder for offset printing includes a cylinder member of a hollow cylinder having a covering portion which forms a substantially uniform, smooth outer circumferential surface having no spliced portion in the circumferential direction, the covering portion being capable of transferring printing images onto an adjacent printing cylinder or printing paper in contact with the covering portion; and printing cylinder support mechanism including a pair of support shafts which are supported on opposed frames such that the support shafts are rotatable about a common axis, the support shafts each having a shaft end portion which is connected to an end portion of the cylinder member via an engagement portion and by use of connection member. The engagement portion includes a depression and a projection formed on the end surface of the cylinder member and the shaft end portion of the corresponding support shaft.

Abstract: A groove for receiving opposite end edges of an object, like a printing plate that extends around a printing cylinder, is formed in a printing cylinder adjacent the outer circumferential surface thereof to extend from an axially extending anchor-shaft hole to the outer circumferential surface of the cylinder body. One wall surface of the groove intersects, at an acute angle, a tangent plane passing through a line of intersection between the wall surface and the outer circumferential surface of the printing cylinder, thereby forming an edge together with the circumferential surface of the printing cylinder. When an anchor shaft inserted into the anchor-shaft hole is rotated by means of elastic force, pins studded into a cutaway surface of the anchor-shaft enter anchor holes formed in an end edge portion of the object and secure the end edge portion within the groove. Thus, the object is attached to the printing cylinder.

Abstract: An object of the present invention to make it possible to bring precision-machined electrodes close to liquid filaments being injected through orifices, and manufacture a charging plate easily and at low cost. An unrounded edge on which a work surface on an upper surface intersects with one side surface is formed on a substrate made of non-conductive substance, and a plurality of electrodes are disposed, with the distal ends thereof aligned with the edges.

Abstract: A tab for fixing a paper web end portion of a paper roll includes a substantially parallelogram-shaped base sheet having two diagonally opposite acute angles. A plurality of linear, discontinuous cuts are formed on the base sheet in parallel with two opposite sides of the base sheet to thereby define a first portion in cooperation with one of the two opposite sides and a second portion in cooperation with the other side. The cuts extend to at least one of other two opposite sides of the base sheet. Adhesive is applied to the first and second portions on the same surface such that an appropriate nonadhesive portion is formed between adhesive applied onto the first portion and adhesive applied onto the second portion. A release sheet having a size greater than that of the tab is attached to an adhesive-applied side of the tab such that a portion thereof is projected beyond the profile of the tab. Alternatively, the release sheet assumes the form of tape.

Abstract: A printed image inspection apparatus comprises an image reading section that irradiates a printed image being inspected with two types of light having different dominant wavelengths and reads images from the reflections of the two types of light, a judgment section that compares the images read by the image reading section with reference images stored in advance and judges the agreement between both, and an operation control section that control the operation of the image reading section and the judgment section. The image reading section comprises a first light source outputting blue light having a low reflectance with respect to yellow, magenta and black inks, and a second light source outputting yellow light having a low reflectance with respect to cyan, magenta and black inks.

Abstract: The problem to be solved by this invention is a conventional printing web position adjusting apparatus poses a problem in which angularly displacing means having excellent accuracy is difficult to install, large power is needed, fabrication cost is high, an adjustment result cannot be detected since a side edge position is detected on an inlet side of the apparatus and space saving cannot be achieved. A printing web position adjusting apparatus for adjusting a side edge position of printing web to a previously,determined position based on an output signal of an edge sensor provided on a downstream side of the apparatus by angularly displacing integrally two of guide bars provided between two guide rollers orthogonal to a travelling direction of printing web and in parallel with each other and respectively having different angular displacement centers arranged such that printing web is made to wrap over substantially 180 degree of peripheral faces thereof while maintaining parallelism therebetween.

Abstract: A printing cylinder for offset printing includes a cylinder member of a hollow cylinder having a covering portion which forms a substantially uniform, smooth outer circumferential surface having no spliced portion in the circumferential direction, the covering portion being capable of transferring printing images onto an adjacent printing cylinder or printing paper in contact with the covering portion; and printing cylinder support mechanism including a pair of support shafts which are supported on opposed frames such that the support shafts are rotatable about a common axis, the support shafts each having a shaft end portion which is connected to an end portion of the cylinder member via an engagement portion and by use of connection member. The engagement portion includes a depression and a projection formed on the end surface of the cylinder member and the shaft end portion of the corresponding support shaft.

Abstract: A paper roll braking device for rotary presses, in which a web is paid off from a paper roll supported between frames, caused to travel, and printed in a printing unit, comprising rotors provided on supporting members for supporting the paper roll, braking sections provided at a plurality of locations along the rotors and having friction discs that can engage with, or disengage from, the rotors at their respective locations, engage/disengage changeover sections for controlling the engage/disengage operation of the friction discs with respect to the rotors, and a tension sensing mechanism for sensing changes in the running tension of the web; a contact pressure adjusting section for adjusting the contact pressure of the friction discs to the rotors via the engage/disengage changeover section in accordance with the changes in running tension detected by the tension sensing mechanism, an outside diameter detecting section for detecting the outside diameter of the paper roll, and an operation control section for

Abstract: A groove for receiving opposite end edges of an object such as a printing plate is formed in a printing cylinder in the vicinity of the outer circumferential surface thereof such that the groove extends from an axially extending anchor-shaft hole toward the outer circumferential surface of the cylinder body, thereby opening at the outer circumferential surface. One wall surface of the groove intersects, at an acute angle, with a tangent plane passing through a line of intersection between the wall surface and the outer circumferential surface of the printing cylinder, thereby forming an edge together with the outer circumferential surface of the printing cylinder. The first end edge portion of the object is bent at an acute angle, and the second end edge portion of the object is bent at an obtuse angel which is substantially the supplementary angle of the acute angle.

Abstract: Disclosed is a guide apparatus for use in a folder which is composed of a collect cylinder, a cutting cylinder, and a jaw cylinder. In the guide apparatus, a paper guide is disposed to partially cover the outer circumferential surfaces of the collect cylinder and the jaw cylinder on the downstream side of a narrowest gap between the collect cylinder and the jaw cylinder, to thereby define a triangular sheet transfer space in cooperation with the collect cylinder and the jaw cylinder.

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 printed matter transport device. 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 and the gripping mechanism, to reduce manufacturing costs, and to enable the printed matter to be firmly gripped. A chain with grips having 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 and a cam member are provided.

Abstract: A chopper folder for a rotary press folds signatures which are periodically conveyed, one signature at a time, from a folding machine. The chopper folder includes a pair of folding rollers for folding a signature parallel to the conveyance direction, a prime mover, a crank arm fixed to an output shaft of the prime mover to be rotated together with the output shaft, a blade holder connected to the crank arm via a link, a chopper blade held in the blade holder and adapted to push the signature from an upper surface thereof in order to insert the signature into a space between the pair of folding rollers, and guide units for restricting motion of the blade holder such that the blade holder reciprocates only in a direction perpendicular to a conveyance plane along which the signature is conveyed.

Abstract: It is an object of the present invention to prevent waste when printing is made on a paper web threaded through a detour web path from a printing unit to a folding unit via other printing units in such a manner that printing images are changed while the web is being transported by changing over a plurality of printing units through which the web is passed. The control section of each printing units having a detour web path is adapted so that it can produce a phase correction value so as to correct a drive reference speed signal with a signal relating to the difference between a drive reference phase and a corrected phase and a feedback speed signal.