Abstract: A sampling apparatus automatically samples a small number of printed sheets from a conveyance path which is formed by two opposed conveyance members constituting the conveyance path and through which folded printed sheets are conveyed in a line and overlap each other at a certain pitch. The sampled printed sheets are taken out from the conveyance path through an opening portion formed in one of the conveyance members. The apparatus includes a sample plate. The sampling plate reciprocates linearly between a wait position and an advanced position. When the sampling plate is advanced, the sampling plate traverse a conveyance path zone corresponding to the opening portion and reaches the opening portion, while maintaining a posture in which the sampling plate is substantially parallel to the printed sheets line.

Abstract: A branching apparatus is provided in a paper-web threading apparatus of a rotary press in which, in order to thread a paper web into a threading path of the rotary press, threading guides are disposed at side portions of the threading path to extend therealong, thereby forming a threading-member traveling path through which a threading member can travel.

Abstract: An automatic register control system for multi-color rotary presses having adjusting means for adjusting the phase on a plate cylinder of each printing section, comprising a registering error detecting device that reads register marks each printed on a traveling paper web by each printing section with a CCD camera as image data, corrects the image data using inherent correcting means, and detects the characteristic points of the register marks as their coordinates to detect a deviation between the actual coordinates of the detected characteristic points and the desired coordinates thereof, and adjusting signal output means for outputting an adjusting signal to the adjusting means to adjust the phase of the plate cylinder in each printing section on the basis of the deviation detected by the registering error detecting device, thereby automatically adjusting registering errors in the multi-color rotary press.

Abstract: A tension controller for controlling the tension of running paper web. When a rotary press starts to operate and performs a minimum speed operation, the controller balances the tension of the paper web between a floating roller and a dancer roller, thereby easily bringing the dancer roller to the central position of its swing stroke. Also, the tension controller deactivates a dancer roller positioning mechanism in accordance with an acceleration signal before an impression on signal for starting printing is issued, thereby smoothly initiating tension control from the beginning of printing. Further, the displacement range of the dancer roller is divided into a plurality of regions. Based on values detected by three detection sensors for the dancer roller, namely a displacement direction detection sensor, a displacement speed detection sensor, and a displacement position detection sensor, the tension controller controls the driving time of an infeed roller drive transmission regulation unit.

Abstract: A dampening system for planographic printing presses having a roller means for feeding dampening solution injected by a nozzle means onto the surface of a plate cylinder comprises a motor for moving the nozzle means, a nozzle position signal output means for outputting the present position of the nozzle means, a moving position setting means for setting moving position to which the nozzle means is to be moved, and a data select signal output means for outputting an access signal in accordance with the operating speed of the printing press, and controls the distance between the roller means and the nozzle means in accordance with the operating speed of the printing press.

Abstract: A mechanism for drawing superimposed webs in a rotary press comprises: a drag roller provided between a printing press and a folding machine so as to be rotated and driven at a peripheral velocity suitably higher than that of a plate cylinder; a plurality of propeller rollers operative for selective engagement with or disengagement from the edge portions at the respective sides of a plurality of printing webs which are superimposed upon each another and wound around the outer peripheral surface of the drag roller, the propeller rollers being rotatable and provided along the outer peripheral surface of the drag roller at both ends thereof; and pressing apparatus for pressing the propeller rollers onto the edge portions of the printing webs.

Abstract: An abnormality detector for nozzle-type dampening systems in offset printers, for injecting dampening solution through nozzles onto a receiving part by intermittently opening nozzles with nozzle opening signals generated by a nozzle operation controller, which detects the abnormal injection of dampening solution through the dampening system nozzles is disclosed.

Abstract: An ink pump control system for an ink pump installed on printing presses, driven by a stepping motor, with the ink feed thereof being controlled in accordance with the revolution of the stepping motor, including a first pulse output device for outputting a pulse signal proportional to the operating speed of the rotary press, a memory device for storing ON/OFF bit strings in accordance with a printing element ratio of a plate surface area to which ink is to be fed obtained in advance by a printing element ratio measuring device, a second pulse output device for sequentially reading each bit in the ON/OFF bit string stored in the memory device every time a pulse signal outputted by the first pulse output device is inputted, and outputting a pulse signal in accordance with the read bits, and a motor driver for operating the stepping motor in accordance with the pulse signal outputted by the second pulse output device, so that ink feed is controlled optimally.

Abstract: An ink fountain apparatus for a printing press includes an inclined member with an ink supply adjusting member which is swingable about an axis parallel with the rotational axis of an ink fountain roller for movement between a first position where ink fountain is formed and a second position where the ink fountain is not formed. Piston rods of hydraulic cylinders are connected to the inclined member via a connection mechanism to move the inclined member between the first position and the second position. Stoppers are also provided to stop the inclined member at the first position. Springs are included in the connection mechanism to press the inclined member against the stoppers. The spring force produced by the springs is smaller than the force produced by the drive means. With this structure, the work load of an operator can be reduced while enhancing the efficiency and safety of his work.

Abstract: An ink fountain apparatus includes a plurality of ink blade segments which are arranged in a row extending in the axial direction of a ink fountain roller to form an adjustable ink supplying port between the ink blade segments and the peripheral surface of the ink fountain roller, and an adjusting mechanism provided for each of the ink blade segments to adjust the degree of opening of the ink supplying port. The adjusting mechanism includes a spring which forces the ink blade segment to retract away from the ink fountain roller, a press rod which contacts the rear end of the blade segment at its forward end and is provided with a cam follower facing toward the direction of retracting movement of the blade segment, and an end cam member which is rotatable about a rotational axis parallel to the direction of movement of the blade segment and has a cam surface which is in contact with the cam follower.

Abstract: A dampening arrangement for a printing press such as a lithographic press includes at least one solution receiving roller for receiving dampening solution and other rollers for conveying the dampening solution to a printing plate. The dampening arrangement is provided with a nozzle unit having a plurality of nozzles arranged substantially in parallel with the axis of the solution receiving roller and opposed to predetermined areas on the surface of the solution receiving roller, and a dampening solution supply source connected to the nozzle means for supplying the nozzles with a pressurized dampening solution. The distance between the nozzles and the surface of the solution receiving roller is automatically adjusted in accordance with the printing speed of the printing press. The printing press does not cause a printing defect due to excess supply of the dampening solution even when the printing press is operated at a high speed.

Abstract: An ink fountain apparatus comprises a storage part for forming an ink storage space in cooperation with an external periphery of a fountain roller, the storage part including a bottom portion having a front edge which is opposed to the external periphery of the fountain roller with a gap defined by the front edge and the external periphery, the gap serving as an inc supplying port, an ink supply adjusting member arranged movably forward and rearward in contact/separation directions with respect to the fountain roller to adjust the degree of opening of the ink supplying port by means of the front edge of the ink supply adjusting member, a screw feeding mechanism for driving the ink supply adjusting member to move it forward and rearward, and stopper means for restricting the rotation of a rotation driving member of the screw feeding mechanism.

Abstract: A ladder for contraction and storage on an upper working floor of a printing press having a plurality of vertically arranged working floors for access to said printing press at said working floors, such ladder having a plurality of substantially equal length sections coupled to each other at overlapping ends of said sections at side rack of said ladder for expanding and contracting such ladder, the upper end of the upper-most ladder section, when such ladder is expanded, having coupling means engageable with rails on such upper working floors for guiding such ladder, when contracted, into a horizontal position at such upper working floor for storage and for guiding such contracted ladder to a position at the end of such upper working floor for movement from a horizontal storage position to a substantially vertical expanded position for extension between such upper working floor and a working floor therebelow and means for locking such plurality of coupled sections into such contracted position for storage.

Abstract: A paper web routing control system for rotary press having a printing system in which a plurality of printing machine sets are arranged so that paper web routes ranging from a plurality of paper web feeding sections to folding sections via the respective printing sections thereof can be built freely; the paper web routing control system comprises a course portion storage and control means for controlling divided course portions, a paper web route storage and control means having data for constructing continued paper web routes, a link table preparation means for preparing link tables, an input/output control means for generating, transmitting and receiving control signals, and a control section.

Abstract: A printing plates lifting apparatus having storing function in a rotary press having upper and lower printing units arranged in tiers and upper and lower work floors corresponding to the printing units. The printing plates lifting apparatus comprises upper and lower rotating bodies, opposed endless flexible bodies which are engaged with vertically opposed upper and lower rotating bodies, driving means for rotating the rotating bodies to run the endless flexible bodies, and printing plate hanging members arranged along and between the endless flexible bodies.

Abstract: A rotary press has a feeder unit provided with a paper roll support frame, and a printing unit (tower type printing unit) provided with a printing means, and the feeder unit is disposed in a non-parallel and vertical relation with respect to the printing unit, the rotary press being further provided with a means for turning a paper web, which is fed from a paper roll supported on the feeder unit, and sent to the printing means, in such a manner that the surface of the paper web is opposed to the printing means. The web turning means is provided so that the guide surface thereof can be displaced in the direction in which the position of a paper web is changed with respect to the widthwise direction of the printing means. The feeder unit is provided with a plurality of paper roll support frames so that the paper webs can be drawn out at once from at least two paper rolls out of the paper rolls set on these paper roll support frames.

Abstract: A plate cylinder for a printing press having mounting apparatus for mounting sheet type printing plates on such plate cylinder, such plate cylinder having grooves extending in parallel to each other and parallel to the axis of such plate cylinder on the outer circumferential surface of such cylinder, such mounting apparatus including side edge positioning members for engagement in said grooves for engaging side edge reference on a sheet type printing plate to be mounted on such plate cylinder and slit positioning members for engagement in said groove for engaging slits formed in end portions of a sheet type printing plate to be mounted on such plate cylinder.

Abstract: A delivery machine of a folder unit including endless transfer means disposed to pass in close proximity to a downstream side of a discharge portion of a folding machine for discharging, one-by-one, folded paper sheets while passing around guide wheels driven in synchronism with the operation of the folding machine. The delivery machine also includes an openable/closable folded paper sheet holding device sequentially disposed on the endless transfer means with predetermined gaps between them. A folded paper sheet holding operation device brings the folded paper sheet holding device at least from an open state to a closed state in close proximity to the downstream side of the discharge portion of the folding machine so as to allow them to hold one-by-one the folded paper sheets discharged sequentially from the discharge portion of the folding machine.

Abstract: An auto-paster adapted to press a paper web which is drawn out from one paper roll out of a plurality of paper rolls supported on a paper roll support frame, and which runs forward, against the circumferential surface of another paper roll by pressing members and bond the paper web to a paper web from the second-mentioned paper roll, having at least an operating force applying arrangement for operating the pressing members quickly so as to press the paper web in motion against the circumferential surface of the second-mentioned paper roll, and a pressing force applying arrangement for suppressing the bouncing of the pressing members occurring after the pressing members have come into operation, the auto-paster being further provided as necessary with a control apparatus for controlling the operation timing of the pressing force applying arrangement.

Abstract: Disclosed is a paper roll driving apparatus which comprises a timing belt pulley fitted to a rotatable holding member for holding a paper roll core, a timing belt disposed in such a manner as to be selectively displaceable into an engagement/disengagement state with and from the timing belt pulley and belt driving means for driving and moving the timing belt in engagement. The holding member or in other words, the paper roll, is driven for rotation by driving of the timing belt.