Abstract: A method for detecting registering errors for multi-color rotary presses in which register marks are printed on a paper web by each printing section, a light source is caused to flash based on a reference signal generated by signal output means operating in synchronism with the rotation of a predetermined plate cylinder for outputting signals, the register marks printed by all printing sections are read as two-dimensional image data via reading means operating in synchronism with the flashing of the light source, the two-dimensional image data are developed into matrix data, a first center of gravity is found as an approximate center of gravity of each register mark from the matrix data, a second center of gravity is found as a high-precision center of gravity of each register mark from the matrix data based on the first center of gravity, the second center of gravity of a predetermined register mark is used as a reference to find the relative positions of other register marks, a deviation of the resulting re

Abstract: A web of printed paper is cut into sections by a cutting cylinder while riding on a folding cylinder, and each paper section has its midpart subsequently pushed by a folding blade on the folding cylinder into a jaw cavity formed in the surface of a jaw cylinder in order to be folded into the form of a signature while being transferred from the folding cylinder onto the jaw cylinder. Mounted adjacent the opposite ends of the jaw cavity in the jaw cylinder are a pair of hooks which are cammed into and out of the space that is created by the midpart of each paper section upon insertion in the jaw cavity. The paper section has its midpart positively retained in the jaw cavity while being folded. A set of fixed and movable jaws is also provided in the jaw cavity and functions mostly to fold the paper section rather than to grip the same against accidental detachment.

Abstract: A paper-web holding apparatus is provided in a rotary printing press having rollers which form a path for a paper web fed from a paper web feeding unit to travel along to a folding unit via a press unit and around which the paper web is wrapped. The paper-web holding apparatus includes a rotation restraint mechanism provided for at least one selected roller, and a propeller roller mechanism provided for the selected roller. The rotation restraint mechanism restrain rotation of the roller when the rotary printing press is halted, and allows rotation of the roller when the rotary printing press is operated. The propeller roller mechanism has a pressing member which is advanced toward the roller in order to apply pressing force to the roller at least when the rotary printing press is in a halt state.

Abstract: A honeycomb structure with a plurality of flexible material strips which are arranged next to one another and are connected to one another is presented. The material strips have a corrugated shape with U-shaped cross section of essentially straight, vertical partial areas (3) and curved, horizontal partial areas (2). The material strips are connected to one another at contact points (4) of the straight, vertical partial areas. In addition, a device for manufacturing a honeycomb has welding sections (6). The flexible material strips (9) are guided by the welding sections (6), where the material strips are welded to one another by means of a comb-like finger system (10). The finger system or the welding sections are laterally displaced by two sections and by a pressing operation taking place between the finger and the welding section. This presses two material strips onto a heated welding wire (7), which leads to the thermal connection of the material strips.

Abstract: An axial-position adjustment apparatus is used to adjust the axial position of an arm shaft equipped with paper roll support arms. The arm shaft is supported rotatably and axially movably on a frame in a paper web feed unit and rotated by means of a shaft-rotating apparatus located at one end portion of the arm shaft. The axial-position adjustment apparatus has a moving member including a male screw and connected to the arm shaft in such a manner as to be rotatable and axially immovable in relation to the arm shaft; a guide member having a threaded hole formed therein, the male screw of the moving member being screwed in the threaded hole, and the guide member being provided in such a manner as to be nonrotatable and axially immovable in relation to the frame; and a drive unit for rotating the moving member. The moving member and the guide member are located adjacent to the shaft-rotating apparatus. The drive unit is provided on a support member axially immovably connected to the arm shaft.

Abstract: The folding station of a rotary printing press has a folding cylinder on which the printed paper web is cut into sections. Mounted opposite the folding cylinder, a jaw cylinder has cut in its surface several jaw cavities each extending parallel to the jaw cylinder axis for receiving the midpart of the web section as the same is inserted therein by a folding blade on the folding cylinder. Each jaw cavity has mounted therein a series of fixed jaw parts and a series of movable jaw parts, the latter being jointly movable toward and away from the former for engaging and folding the midpart of the web section. The two outmost ones of the movable jaw parts are positioned closer to the fixed jaw parts than are the other, medial movable jaw parts, in order to more firmly engage the margins of the web section without causing ink offset between the contacting surfaces of the image areas of the web section.

Abstract: A rotary drum of the folding device includes a reference portion having a rotating shaft and a basic body rotated integrally with the rotating shaft an adjusted portion able to be rotated integrally with the reference portion and arranged so as to be displaced with respect to the reference portion; an adjusting operation mechanism having a driving source for displacing the adjusted portion with respect to the reference portion, a power source arranged in the reference portion, a control board additionally arranged in the driving source and having a wireless receiving function, and a wireless operation machine for wirelessly transmitting an operation signal to the control board; and an adjusting transmission mechanism for transmitting a movement of the driving source to the adjusted portion; wherein electric power is supplied from the power source to the driving source, and the driving source is operated by a wireless signal from the adjusting operation mechanism.

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: The folding machine with a collect run mode of this invention comprises folding cylinder fixed cam means for carrying out a straight run at pins, folding cylinder rotating cam means provided with covering section so as to enable rotation of the covering sections for covering a cam shape for carrying out the straight run, jaw cylinder fixed cam means for carrying out a straight run at jaw mechanisms, jaw cylinder rotating cam means provided with covering sections to enable rotation of the covering sections covering a cam shape for carrying out a straight run, drive transmission means for ensuring that the covering sections of the folding cylinder rotating cam means rotate at a predetermined rotational speed ratio with respect to rotation of the folding cylinder and that the covering sections of the jaw cylinder rotating cam means rotate at a predetermined rotational speed ratio with respect to rotation of the jaw cylinder, and switching means for switching over driving between the folding cylinder rotating cam

Abstract: A printed paper web or any required number of such web in superposition are cut into sections at the folding station of a rotary printing press. Each web section has its midpart subsequently pushed into one of the jaw cavities in a jaw cylinder, therein to be engaged and folded by a fixed and a movable jaw. Both jaws are mounted to separate, independently movable parts of the jaw cylinder, to which is coupled a jaw spacing adjustment mechanism for moving the jaws toward and away from each other in order to vary the spacing therebetween in any operating phase of the movable jaw relative to the fixed jaw. In order to adjust the jaw spacing to the running speed of the press, as well as to the number of webs being processed jointly, a jaw spacing adjustment circuit is provided which puts out a signal indicative of a desired jaw spacing suiting both the press speed and the web thickness, for delivery to a stepper motor driving the jaw spacing adjustment mechanism.

Abstract: To provide a synchronous controller of a rotary press for selecting a control subject based on print image information, wherein the rotary press of a multicolor printing unit has a printing division for printing a print image on the plate cylinder onto continuous paper passing between two blanket cylinders via the blanket cylinders and is constituted by combining at least two such printing divisions, and the controller has a print image allocation setting division for allocating print images to be printed to each printing couple, a driving unit for individually driving the printing couples, a slave control division for controlling rotation of the driving unit, and a master control division provided by connecting the slave control division and print image allocation setting division.

Abstract: A sheet delivery apparatus includes a cutter cylinder, a cutter reception cylinder, and a conveyor provided downstream of the cylinders. The cutter cylinder and the cutter reception cylinder cooperatively cut a paper web so as to yield sheets of predetermined size. The sheets are delivered by the conveyor. A dampening unit is provided upstream of a region where the cutter cylinder and the cutter reception cylinder closely face each other and in the vicinity of the paper web so as to dampen the paper web such that the surface of the paper web which will face the cutter cylinder is dampened to a greater extent than is the other surface. Grooves are formed circumferentially on the outer circumferential surface of the cutter reception cylinder.

Abstract: A pump for a printing press includes a plunger within 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: A jaw cylinder in a jaw folder is provided. A first base (1) includes a stationary member (11) in a jaw mechanism. A second base (2) includes a swing member (21) having a jaw portion accessible to the jaw portion of the stationary member (11). A third base (3) has end axes (31a, 31b) at both ends and is rotatably supported by the end axes (31a, 31b) on a pair of opposite frames (Fa, Fb). The first (1) and second (2) bases are rotatably located on the third base (3) about the rotational centerline of the third base (3) relative to the third base (3). The first (1), second (2) and third (3) bases synchronously rotate to move the swing member (21) close to and apart from the stationary member (11) to grip a print therebetween. A jaw clearance adjusting mechanism (4) turns the first (1) and second (2) bases about the rotational centerline of the third base (3) in opposite directions to adjust a gap between the jaw portions of the stationary (11) and swing (21) members in the jaw mechanism.

Abstract: A paper jam detection system for a folding machine includes an interval signal generator for generating an interval signal which assumes ON and OFF levels alternately according to cutting intervals of a cutting cylinder; a signature detection mechanism including reflection plates each having a light reflection surface and being arranged circumferentially at an outer circumferential surface portion of a jaw cylinder and a photoelectric sensor adapted to generate a reflection plate detection signal upon detection of the reflection plate; and a control unit for outputting a paper jam signal on the basis of the interval signal and the reflection plate detection signal.

Abstract: Problems exist such as the presence of a narrow gap when the vicinity of a spliced joint of paper webs is passed between an outer surface of a roller and an outer surface of a folding cylinder. Paper blockages due to increased thickness are therefore likely to arise, making it easy for the paper web to become torn. This in turn damages the paper, and machine stoppages are also increased.

Abstract: An apparatus splices a web of paper being paid out from a one web roll and fed into a printing press to another web roll being rotated in a splicing position. The new web roll of any diameter is spaced a prescribed distance from the old web traveling along a predefined path into the press. A sensor positioning mechanism adjustably moves a photoelectric web roll speed sensor along two orthogonal axes to an optimum sensing position with respect to the new web roll regardless of its diameter. An electronic control circuit has an input connected to a speed sensor for the old web traveling along the predefined path, and another to the photoelectric speed sensor for the new web roll, for energizing a new web roll drive motor according to a departure of the peripheral speed of the new web roll from the running speed of the old web.

Abstract: An apparatus for changing operational plate cylinders during rotary press operation is provided. This apparatus is possible to substantially equalize an actual print count to a set print count before change of operational plate cylinders. This can eliminate waste to print undesired recording paper (paper loss) and lead to cost down. A rotary press includes at least two or more plate cylinders (P), drive means (13, 13′) for driving the plate cylinders (P) and switching means (15) for selectively switching the plate cylinders (P) in a printable state and in an unprintable state.

Abstract: A paper roll driving apparatus for use in a paper roll feeding apparatus comprises a prime mover moving mechanism being freely reciprocally movable along a guide rail and having a moving body on which a prime mover is mounted, and a driving transmission mechanism comprising a relay shaft provided on the moving body so as to be in parallel to the rotating shaft and rotatable, an arm mounted on the moving body so as to be pivotable around the axial center of the relay shaft and driven by the prime mover at least via the relay shaft, and a driving transmission mechanism having a pivoting means for pivoting the arm at a predetermined angle; wherein both the prime mover and the driving transmission mechanism being adapted so as to be integrally movable with respect to the paper roll support in parallel with the rotating shaft.

Abstract: There is provided a paper cutting apparatus for a folder, the folder for a web rotary press being provided with a forming roller pair and at least one nipping roller pair on a downstream side of the forming roller pair in a paper passage between a former and a folding cylinder group, and provided with a paper jam detector S for detecting an occurrence of a paper jam at least in the folding cylinder group, including a first cutter A provided so as to be capable of cutting a paper 1 running between the forming roller pair under the former and a nipping roller pair just on the downstream side of the forming roller pair; a second cutter B provided so as to be capable of cutting the paper running between the folding cylinder group and the nipping roller pair just on the upstream side of the folding cylinder group; and control unit D which receives a paper jam signal generated from the paper jam detector S and sends a cutting signal to the first cutter A and the second cutter B.