Abstract: A wall is provided on one side of a web of paper or the like traveling along a predefined path, and an airstream is produced between the wall and the traveling web approximately in the direction of web travel. A transverse static pressure gradient is established across the airstream, causing the stream to flow close to the wall surface. This phenomenon is called as the Coanda effect. A partial vacuum created in the airstream causes the web to deflect from its normal path and to be drawn to the wall surface under sufficient pressure to be kept from fluttering. This method of web flutter control is applied to the splicing of webs, as from one roll to another in a web-fed rotary printing press. The web being unwound from the old roll has been susceptible to fluttering while being spliced to the new roll, such web fluttering being eliminable by providing a wall member along the web path and producing an airstream between the web and the wall member.

Abstract: A delivery fan used in a rotary printing press receives signatures from a folding machine and deposits them on a delivery conveyor and includes hub means, a plurality of fingers mounted to the hub means and a plurality of flat springs anchored to the hub means. The delivery fan handles signatures of varying thicknesses and prevents the signatures from jumping out of pockets formed by the fingers.

Abstract: A tower type multi-color printing press has heating means which is constructed in compact and simple in structure to require lesser space for installation, to lower production cost, to facilitate inspection and maintenance and to reduce frequency of occurrence of failure. The tower type multi-color printing press includes a plurality of printing sections provided with stacking in vertical direction, and heating means provided on downstream side of each printing section and extending in a width direction of a paper web fed through a path across each printing section, for heating a printed surface of the paper web every time completing the printing in each printing section.

Abstract: An ink fountain has one side closed by a fountain roller constantly exposed to the ink contained therein. Forming a part of the fountain bottom, a blade assembly defines in combination with the fountain roller an ink outlet which is to be closed and opened as the blade assembly travels toward and away from the fountain roller. Sprung away from the fountain roller, the blade assembly is moved toward the fountain roller against the spring bias by at least two linear actuators such as double-ended-rod fluid actuators spaced from each other in the axial direction of the fountain roller. The output members of the linear actuators, such as the reciprocable cylinders of the double-ended-rod fluid actuators, are rigidly interconnected as by a simple link, being aligned parallel to the fountain roller axis, for synchronous operation, thereby conjointly causing the travel of the blade assembly into leak-free contact with the fountain roller.

Abstract: Angular deformation is caused in a portion of offset-printed web paper corresponding to an adjacent portion of each of side edges of two blankets of a blanket cylinder so that paper wrinkles are caused. To prevent the paper wrinkles from being caused, a contact roller 10 is arranged in a paper wrinkle preventing device such that a circumferential face of the contact roller can rotatably come in contact with the running web paper W in a rotary printing press having an offset printing portion P for printing the web paper W coming in contact with surfaces of two blankets B2 having side edges adjacent to each other at an approximately axial center of a blanket cylinder B. The contact roller 10 is arranged between the offset printing portion P and a drag roller D1. An equal diameter portion 101c is formed by a roller portion coming in contact with an area of the running web paper W coming in contact with an adjacent portion B1 of each of the two blankets B2 and a portion near this adjacent portion.

Abstract: A printing web transporting roller is disclosed which is characterized by using as the roller basis thereof a roller basis made of a fiber-reinforced plastics and provided on the peripheral surface thereof with a plurality of portions of a surface of large curvature and a plurality of portions of a surface of small curvature alternately arranged in a mutually adjoining state and having a composite coating film superposed on the roller basis and composed of a porous ceramic layer formed by thermal spraying and a resin layer formed on the surface of the ceramic layer and inside the pores in the ceramic layer.

Abstract: An ink supply unit of a keyless printing press is capable of preventing leakage of an ink while printing is interrupted. The ink supply unit includes a movable blade provided between the both side plates in integral form, inclined descending toward a tip end side, supported on a base for movement toward and away from the peripheral surface of the fountain roller, driving means for driving the movable blade between a position where a tip end of the movable blade contacts to the peripheral surface of the fountain roller and a predetermined position where the tip end of the movable blade is located away from the peripheral surface of the fountain roller, and guide means coupled with the movable blade and guiding the movable blade so that the tip end of the movable blade moves with respect to the peripheral surface of the fountain roller with maintaining a predetermined attitude.

Abstract: A tension control device for paper web used in a rotary printing machine which includes paper rolls each of which has a brake mechanism varied in response to fluid pressure to splice to a new roll when a preceding roll reaches to a predetermined remain level, comprises; a tension detecting mechanism for detecting the magnitude of the tension applied to the paper web; a fluid pressure feeding system including at least three routes for feeding respective different pressures to the brake mechanisms; a first brake-force adjusting mechanism to provide a first pressure which is reduced as the tension applied to the paper web increases; a second brake-force adjusting mechanism to provide a second pressure which is reduced as the tension applied to the paper web increases and is greater than the first pressure; a first switching mechanism to switch the fluid pressure route in response to one of predetermined emergency signals; and a second switching mechanism for feeding a third pressure greater than the maximum of t

Abstract: A paper roll supply system for a printing press system comprises a paper roll storage portion having a plurality of vertically arranged shelves for storing a plurality of paper rolls in desired orientation and a paper roll delivery outlet for the paper roll storage portion, the paper roll delivery outlet being positioned in alignment with a paper roll supply station along a substantially straight paper roll transporting path, by way of which a paper roll is transferred to a printing press. For supplying the paper roll to the printing press system, a paper roll transporting means is disposed between the paper roll delivery outlet and the paper roll supply station for transporting a paper roll along the paper roll transporting path.

Abstract: A fold section feeding out apparatus of a folding unit for a rotary press is capable of preventing rebounding of a read end portion of a fold section to be caused upon transferring from a delivery fan to a conveyer. The fold section feeding out apparatus includes the delivery fan receiving fold sections cut and folded by a folding unit for feeding, and the conveyer receiving fold sections fed from the delivery fan and transporting the fold section in overlapped condition with shifted for a predetermined pitch. The fold section feeding out apparatus also includes at least one air ejecting means opening above the conveyer and ejecting a compressed air from a leading end side of the fold section at least toward a position in the vicinity of the rear end of the fold section for holding the rear end of the fold section transferred from the delivery fan to the conveyer as being lowered according to rotation of the delivery fan, for restricting free movement of the rear end of the fold section.

Abstract: An offset perfecting press is disclosed wherein a web is printed on both sides while traveling between a pair of blanket cylinders. In the event of a web break downstream of the blanket cylinders, the web is conventionally cut off immediately upstream of the blanket cylinders. Thereupon, on the downstream side, the web will stick to either of the printing cylinders due to the adhesiveness of the ink thereon, tending to be wound about the cylinder all the way down to the point of break. In order to prevent this a pair of opposed web cut blades are disposed. Intermediate the printing cylinders and a downstream guide roller. Upon web break a pressure roller is actuated into rolling engagement with the guide roller via the web, urging the web forwardly by inertial rotation of the guide roller. Thus tensioned between either of the printing cylinders and the guide roller, the web is held tightly against either of the opposed blades thereby to be cut off.

Abstract: For moistening a water roller in contact with a planographic printing plate on a plate cylinder in an offset printing press, a sprayer produces a more or less flat spray of dampening water. Baffles are positioned in front of the sprayer to define an aperture through which the spray travels before hitting the water roller. The aperture has a width shorter than the longer dimension of the cross section of the spray as measured in a plane containing the aperture, and longer than the shorter dimension of the cross section of the spray in the same plane. Thus the rate at which the dampening water is supplied to the water roller is infinitely variable by changing the angular position of the spray relative to the aperture between a minimum dampening position where the spray has the opposite longitudinal end portions of its cross section interrupted to the utmost by the baffle means and a maximum dampening position where the spray is allowed wholly through the aperture.

Abstract: A paper pasting device has a depressing member depressing a paper web being fed. The paper web is depressed onto a roll of a paper web by the depressing member. The paper pasting device includes first depressing element cooperatively connected with the depressing member, for urging the depressing member toward the currently consumed paper and depressing the currently consumed paper onto the another roll of the paper web, and second depressing element provided separately from the depressing member and actuated after depressing operation of the first depressing means for contacting with a proper second portion of the depressing member and the cooperating member of the depressing member, for contacting with the proper second position of the depressing member and the cooperating member and reinforcing a depressing force by the depressing member.

Abstract: An inking roller has a pair of journals coaxially coupled to its opposite ends, the journals being supported by frame means for both rotation and axial reciprocation with the roller. The journals are detachable from the roller by being moved axially away therefrom, as when the roller becomes worn or flawed and needs replacement. A pair of guide rails are removably mounted to the frame means so as to extend in parallel spaced relationship to each other. On being freed from the journals, the roller rests on the guide rails for rolling thereon between a mount/dismount position, where the roller is mounted to and dismounted from the frame means via the journals, and a load/unload position where the roller is loaded into and unloaded from the press. A drive lever coupled to one of the journals to impart linear reciprocation to the roller is deprived of its fulcrum to permit that journal to travel axially away from the roller for disconnection.

Abstract: An offset perfecting press is disclosed which has a pair of blanket cylinders on opposite sides of a web traveling along a predefined path. Bearing different images to be printed, two plate cylinders are disposed in circumferentially spaced apart positions on each blanket cylinder. Each plate cylinder is independently movable between an image transfer position, where the plate cylinder is held to the blanket cylinder in order to print an image thereon for subsequent transfer to the web, and an image nontransfer position where the plate cylinder is spaced from the blanket cylinder. Only one plate cylinder is held in the image transfer position on each side of the web. For a change from one image to another, the plate cylinders that have been printing the opposite sides of the web are retracted to the image nontransfer positions, and the other plate cylinders, rotating in phase with the blanket cylinders, are moved to the image transfer positions. There is no need for stopping the web or the blanket cylinders.

Abstract: A paper feeding apparatus is provided for use in a web threading apparatus of a rotary press for threading a web along a web threading path by drawing a leading end of the web using a web threading member movably provided on an outside portion of the web threading path and along the web threading path. The paper feeding apparatus includes a pair of an upstream roller and a downstream roller extending substantially parallel to a width direction of the web in the web threading path, and a driving mechanism for driving the upstream and downstream rollers in a feeding direction of the web and for ensuring that a peripheral speed of the downstream roller is at least equal to a moving speed of the web threading member. The upstream and downstream rollers are offset on an upstream side and a downstream side in a direction of the web threading path so that the web is not nipped by both the upstream roller and the downstream roller.

Abstract: An ink fountain divider, which is capable of completely preventing leakage of ink and is easy to handle, includes an ink fountain divider body which has an approximately triangular shaped cross-section having a bottom edge having a contour line conforming with the outer peripheral surface of the ink fountain roller, and another edge having a contour line conforming with the an upper surface of the bottom plate, having a given width in a direction parallel to an axis of the ink fountain roller. The ink fountain divider body is formed of a non-magnetic material having a hardness smaller than that of a material forming the outer peripheral surface of the ink fountain roller. The ink fountain divider body contacts with the bottom plate of the ink fountain arrangement for dividing an ink storage space in the ink fountain arrangement.

Abstract: A dampening water supply device is capable of reducing spoilage upon initiation of printing after temporary stop when accumulated printing operation before temporary stop is large.

Abstract: A dampening device for supplying a dampening liquid to a plate of a printing press is capable of optimize amount of the dampening liquid to be supplied to the plate through a transfer roller irrespective of fluctuation of supply amount of the dampening liquid from the dampening liquid source. The dampening device thus adjusts deposition pattern of the dampening liquid ejected from a plurality of nozzles onto the transfer rollers depending upon a printing speed of the printing press.

Abstract: A reel feeding apparatus comprises a rotational shaft to be rotatably driven, plural pairs of reel supporting arms radially provided in an equally divided arrangement around the rotational shaft, each of the pairs of the supporting arms being arranged opposite to each other in an axial direction of the rotational shaft and movable in accordance with the rotation of the rotational shaft, and a reel supporting member rotatably provided at the reel supporting arm. Both sides of the web are supported by the reel supporting members of the opposing pair thereof.