Abstract: A web-fed rotary press has an adjustable reel changer for accommodating printing material webs of different widths, a printing couple with printing cylinders, which can be engaged with one another to form printing stations, and an adjustable folder. The width of the reel changer and the positions of the printing cylinders and of components of the folder are adjusted automatically and in a mutually coordinated manner during the run of the press for changing over the production from a first printed product to a second printed product.

Abstract: A highly flexible printing apparatus is provided comprising printing modules (A-F) and cassettes (8) containing different web processing means. Each of the cassettes (8) is adapted to be mounted on a selected printing module (A-F) to cooperate with the module (A-F) during production of printed matters and contains means for a specific web processing technology that will be provided by the selected printing module (A-F) when the cassette (8) has been mounted to it. The different cassettes (8) may contain web processing means of a great variety, such as offset printing means, dry offset printing means, letterpress printing means, serigraphy means, hot foil application means, flexographic means, raised printing means, punching means, means for printing electronically generated images, etc.

Abstract: Flexographic web printing apparatus constructed for continuous web feed and for change-over from printing one impression on the web to printing a succeeding impression on the fly without interrupting the web feed.

Abstract: Rubber-blanket cylinder engagement and disengagement device for a rotary printing press having a plate cylinder and an impression cylinder includes swivel arms whereon the rubber-blanket cylinder is journalled, the swivel arms being articulatedly connected to a frame of the rotary printing press, an actuating device for swivelling the swivel arms, and an adjustable stop device disposed at a side of the frame for limiting swivelling motion of the swivel arms so as to bring about a setting thereof in a rubber-blanket cylinder engagement position, the stop device having at least one supporting element formed with a large supporting surface by which the stop device cooperates with the rubber-blanket cylinder.

Abstract: An apparatus for printing on individual articles comprises a printing cylinder and an impression cylinder. When printing on articles with a cavity for accommodating for example a chip the wall region of the card which delimits the cavity has to be supported for printing on the side opposite the cavity. For that purpose the impression cylinder has a support portion engageable into the cavity when the article passes the impression cylinder. For converting the apparatus between printing procedures of different kinds the support portion is displaceable between an inoperative position and an operative position by displacement of the impression cylinder in the direction of rotation thereof so that in one basic angular position the support portion does not come into contact with the articles passing the impression cylinder during the printing operation and in another basic angular position the support portion engages into the cavity of the article.

Abstract: A varnishing machine having an arrangement for adjusting pressure between the varnishing and pressure cylinders and for compensating changes in rotational speed of the varnishing cylinder caused by soaking of the varnishing cylinder shell and/or regrinding of the varnishing cylinder, with the arrangement including two auxiliary side members for supporting the varnishing cylinder or pressure cylinder, two motor spindles for pivoting the two side members, respectively, pressure sensors for sensing the axial pressures applied by the two-motor spindles, a pressure regulator for controlling the applied pressures and thereby the pressure between the varnishing and pressure cylinders, and displacement sensor for sensing an angular position of one of the side members, the position signal generated by the displacement sensor being used as a control variable for controlling the rotational speed of the varnishing cylinder.

Abstract: An apparatus for supporting a cylinder within a processing unit is provided, the cylinder having a releasable end portion and a removably sleeve mounted thereon. A counterpoise assembly is assigned to one end of the cylinder. The cylinder is supported on both ends by support housings. One of the support housings is supported, during throw-off of the cylinder, by a horizontally movable supporting device. A sliding device is assigned to the supporting device on the respective side frame.

Abstract: A device for mounting an applicator roller of a dampening unit in a printing machine is disclosed. The device is adapted for rotatably receiving a roller journal of the applicator roller and for fixing that journal relative to the frame part of the printing machine to provide jolt-free operation of the applicator roller. The device is also adapted to provide linear movement of the applicator roller relative to its adjacent plate and dipping cylinders. The device preferably includes adjusting eccentrics mounted one in the other. The adjusting eccentrics are independently adjustable. The eccentricities of the adjusting eccentrics are arranged such that the applicator roller can be thrown-on, thrown-off and set approximately radially both to the plate cylinder and to the dipping roller. As a result of the independent adjustability of the eccentrics, the applicator roller can be optionally thrown-on to the plate cylinder without contacting the dipping roller or vice versa.

Abstract: A mounting device for bearings placed on shaft extensions consists of a lower support basin rigidly connected with the frame and of a lid, connected in a pivoting manner with same, provided with a lower lever forming the operating portion which, when the lid is in the open position, extends into or across the support basin far enough to pivot the lid into its closed position by lowering the bearing abutting against it and placed on the shaft extension; in which closed position the basin rests tightly against the bearing with its circular, curved inner side. For the sake of simplification, a single lid is provided in a pivoting manner with a locking lever, which has at its end a hook portion, which engages an abutment of the support basin. Furthermore, an arrangement is provided which automatically pivots the locking lever.

Abstract: An apparatus for the print throw-on and throw-off of the rubber blanket cylinder in the printing unit of a sheet-fed offset printing machine is described. For the throw-on and throw-off of the rubber blanket cylinder in relation to the impression cylinder and to the plate cylinder, the rubber blanket cylinder is mounted pivotably on both sides in eccentric bearings. The pivoting of the eccentric bearings takes place via two individually switchable actuating means, a print regulation mechanism being connected in series up from the actuating means. The two actuating means act on the eccentric bearings via a ternary member for the pivoting of the eccentric bearings, this arrangement selected in this way making it possible, in the case of larger thicknesses of printing material, to throw off the rubber blanket cylinder only from the plate cylinder. The print throw-off and throw-on thus causes lower torque jolts because of the smaller pivoting travel.

Abstract: A device for the coupling and uncoupling of a printing unit, said printing unit, with its plate cylinder, being engaged with a blanket cylinder in a first position and being disengaged from said blanket cylinder in a second position. Further, the device can be configured so as to additionally serve for a printing press, having at least two printing units assigned to one blanket cylinder, to be variably operated with optimal results. This is achieved in that the printing unit can be brought into a third position, wherein it is disconnected from the drive. Also contemplated herein is a method for coupling printing stands to one another in a printing press.

Abstract: An apparatus for interlocking eccentric bearings for a printing cylinder in a printing press, wherein a connecting shaft is penetratingly arranged in the cylinder of the printing cylinder which is rotatively supported through a pair of eccentric side bearings mounted on a pair of side frames respectively, and each of the eccentric bearings is connected to the connecting shaft.

Abstract: An offset printing press comprises a plate cylinder onto which a printing plate is attached, a form dampening roller having an elasticity on its outer surface, a water fountain roller immersed into water in a water pan, and intermediate roller means for transferring the water from the water fountain roller to the form dampening roller. The intermediate roller means comprises a water oscillating roller which has a hydrophilic property on its outer surface and is capable of reciprocating in its axial direction with contacting the form dampening roller. Also, the offset printing press comprises first moving means for moving the form dampening roller close to and away from the plate cylinder; and second moving means for moving at least one of the water oscillating roller and the form dampening roller so that these two rollers can be moved close to and away from each other.

Abstract: A printing press is provided with at least one counterpressure cylinder and with at least one printing roller cantilevered at one end in the rolling stand and at least one inking roller or screen roller of an inking system cantilevered at one end in the rolling stand, where the bearings of the printing roller and screen roller travel, in guide mechanisms, relative to the counterpressure cylinder. In order to ensure that the printing executed by means of the end region of the cantilevered impression cylinder is also perfect, a plate is coupled to the rolling stand, which plate is provided with bearings in order to accommodate the journals of the free ends of the printing and screen rollers. In this regard, the plate can be swung to either a retracted position, in which the cantilevered rollers are freely accessible, or to a operating position, where the journals of the free ends of the rollers are carried by the plate.

Abstract: A cylinder throw-on and throw-off mechanism for a printing press having a plate cylinder and a printing cylinder, which are disposed with outer surfaces being separated from each other, and a blanket cylinder disposed therebetween includes a driving unit and a control unit. The driving unit has a motor serving as a driving source and moves the blanket cylinder between an impression-on position where the blanket cylinder is pressed against the plate cylinder and simultaneously pressed against the printing cylinder through a paper sheet and an impression throw-off position where the blanket cylinder is separated from the plate cylinder and the printing cylinder in accordance with a direction of rotation and the number of revolutions of the motor.

Abstract: An arrangement for preventing damage to print units, in which during a failure of the electrical supply of the web-fed rotary printing press, an energy reservoir yields its energy to control means which briefly charge adjusting means to bring at least one cylinder per print unit into a neutral pressure release position. In this way paper wrap-arounds during voltage failure no longer act in a manner damaging to the press.

Abstract: An automated printing press (10) is provided with a plurality of printing stations (13), each having a printing mechanism (60) which prints at least one component image at spaced apart locations along a web (11). Each printing mechanism (60) is positionable to one side of the press for servicing. The print roller (61) is driven through a swingable gear assembly (268) that maintains gear spacing as the print roller to impression roller spacing varies and that engages and disengages tangentially to improve meshing. Microprocessor based computer controllers (400, 405) at each station (13) precisely and repeatably control positions of the printing mechanism (60) and precisely register the component images being printed at the stations (13).

Abstract: In a printing machine (frame etc. not shown) a counterpressure cylinder (1) is rotatably supported in cylindrical bearing housings (5) bordering on the counterpressure cylinder (1) and being held rotatably in the printing machine by means of rollers (10, 11, 12, 13). Opposite to each of these bearing housings (5) is a bearing housing (8) for a plate cylinder (2), the later bearing housing (8)bordering on the plate cylinder (2) and likewise being held in the printing machine between pollers (14, 15, 16, 17). One of these rollers (14) is rotatably supported in the bearing housing (5) for the counterpressure cylinder (1), while two of the rollers (16, 17)act on the bearing housings (8) for the plane cylinder (2) with a classically yielding pressing force.

Abstract: In a rotary printing machine, a device for the print setting of a printing cylinder equipped with a slip-on sleeve. The printing cylinder is supported in a bearing to which an eccentric bushing is secured for reciprocating the printing cylinder between print engagement and disengagement positions. The device includes a coupling rod secured to the eccentric bushing for reciprocating the latter, and the coupling rod is joined to the eccentric bushing by a separable joint such that the coupling rod may be swung out of the area of the frame opening to accommodate changing of the sleeve without removing the printing cylinder from the printing machine.

Abstract: Improved apparatus for rotary printing of a strip of paper (1) or similar material, comprising a printing roller (2) provided with a cliche (3) brought into contact with a back pressure roller (4) and a screened roller (5) to quickly interrupt and resume the printing of the paper (1), said means comprising a support (20) to which the printing roller (2) is rotatingly connected and which is, in turn, rotatingly connected to a fixed pivot (21) eccentric with respect to the printing roller (2) and around which rotation occurs by means of an actuator (22). Washing means (15) are also provided for the cliche (3) and a mobile support (30) of the ink roller (6) which allows it to be distanced from the screened roller (5) so as to create a space (8) which promotes the formation of a film of ink on the screened roller (5) itself suitable to keep it damp and prevent drying. (FIG.

Abstract: A device (10) and a method for positioning a rotatable printing cylinder (16) for a printing press (12). A drive (24) can rotate the cylinder (16) about a cylinder axis (52) at relatively high and low speeds. A sensor (68) is positioned adjacent to the cylinder (16) for detecting rotational positions of the cylinder (16) and providing a signal which varies in response to detected rotational positions of the cylinder (16). A sensor exciting target (66) has first and second edges (74 and 76) at first and second ends, respectively, of a sector of the cylinder (16). The sensor (68) is aligned with the first edge (74) at a first rotational position of the cylinder (16) and is aligned with the second edge (76) at a second rotational position of the cylinder (16).

Abstract: Apparatus for printing onto a substrate printing plates manufactured from flexible material, comprising: a frame; a forme cylinder mounted in the frame and adapted to receive the printing plate; a counter-pressure cylinder mounted in the frame; a guide for carrying the substrate for printing between the forme cylinder and the counter-pressure cylinder; a drive for driving the forme cylinder and the counter-pressure cylinder, wherein the drive is adapted to drive the forme cylinder and the counter-pressure cylinder at a different peripheral speed.

Abstract: A gripper bar conveyor mechanism for transferring sheets to be printed from one rotating impression cylinder to another in a multiple color rotary offset printer of the type having sets of impression cylinders and corresponding blanket cylinders for rolling contact with the sheets to be printed therebetween. The gripper bar conveyor mechanism includes a transferrable gripper bar activatable for releasably securing sheets to be printed in a fixed orientation with respect to the transferrable gripper bar. The registration projection is affixed to the transferrable gripper bar. A registration pocket is adjustably affixed to each of the impression cylinders for temporarily receiving the registration projection of the gripper bar and thereby holding the gripper bar in a desired position with respect to the impression cylinder. A conveyor band is attached to the gripper bar and is operably connected to the rotary offset press for moving the gripper bar from one impression cylinder to the next.

Abstract: In an apparatus for the displacement of bearing blocks mounted on carriages which support shafts, a first carriage is carried for displacement in a carriage guideway fixed to the frame, and the other carriage is carried in a carriage guideway of the first carriage, these two carriage guideways being mutually parallel. To allow the carriages to be displaced with sufficient accuracy without expensive control devices, two spindle screw nuts designed as toothed belt pulleys are mounted in the first carriage parallel to each other and freely rotatable, and the screw spindles screwed into them are mounted selectively for free rotation and for being fixed, on the one hand in the machine frame and, on the other hand, in the second carriage. In the first carriage there is mounted a further drive belt pulley that is drivable by a motor and securable by a securing device, this further drive belt pulley driving an endless toothed belt that drives said spindle screw nuts designed as toothed belt pulleys.

Abstract: A printing press includes two opposite mounting walls formed with aligned horizontally extending openings in which two sliding seats are mounted slidably and respectively, a printing roller extending horizontally between the mounting walls and having a longitudinal axis and two opposite ends mounted rotatably and respectively to the sliding seats, a printing plate unit mounted securely on the printing roller, a first retaining assembly provided on one of the mounting walls for retaining releasably a first one of the sliding seats in a desired position in the respective opening, and a second retaining assembly provided on the other one of the mounting walls for retaining releasably a second one of the sliding seats in a desired position in the respective opening.

Abstract: A coupling structure for a reversing mechanism of a printing press, having a fixed gear (18), a pivotable regulating gear (20), and a plurality of parallel tightening bolts (30) extending in a regularly spaced manner around a cylinder shaft (12) of the reversing mechanism. A one-way clutch (54) transmits limited tightening torque to the bolts (30) to hold gears (18) and (20) together in an engaged state, whereas in a release state, the bolts (30) are freely loosened. A center gear 56 having an internal gear (62) transmits torque to the one-way clutch from an external drive motor (80).

Abstract: A printing unit for a rotary printing press, and that is capable of accomplishing a flying printing change, uses a single counter-pressure cylinder and two printing cylinders and ink application rollers. The counter-pressure cylinder and the ink application rollers are shiftably supported with respect to the printing cylinders. They also carry eccentric support disks that engage concentric support disks or the printing cylinders. These disks are usable to adjust the contact force between the cylinders to compensate for printing plate wear.

Abstract: A cylinder throw apparatus includes a plate cylinder, a printing cylinder, a blanket cylinder, a pair of eccentric bearings, and a motor. The plate cylinder has a circumferential surface on which a printing plate is mounted. The printing cylinder is disposed to have a circumferential surface thereof kept away from the circumferential surface of the plate cylinder. The blanket cylinder is disposed between the plate cylinder and the printing cylinder. The eccentric bearings and the motor move the blanket cylinder between an impression-on position in which the blanket cylinder is pressed against the plate cylinder and, through a paper sheet, pressed against the printing cylinder, and an impression throw-off position in which the blanket cylinder is kept away from the plate cylinder and the printing cylinder, and automatically set a gap between the blanket cylinder and the printing cylinder at the impression-on position in correspondence with a paper thickness.

Abstract: A strip or roll of thermal transfer type recording sheet has a base film on one side of which a hot-melt ink layer is formed for recording on paper or other surface by thermal transfer. An end mark or marks to be detected optically for warning the user of the fact that the recording roll is being used up is/are formed adjacent one end of the strip by gravure printing with use of a light-reflective ink. The end mark or marks produced by gravure printing are of such constant thickness, and with the bounding edges so sharply defined, that they permit positive detection by an optical sensor.For the production of the end marks by gravure printing, a web of base film with the hot-melt ink layer formed on one side thereof, with a width several times greater than that of each strip of recording sheet to be manufactured, is fed through a printing unit of a gravure printing section.

Abstract: A flexographic printing system using mechanical and friction drive at the same time. The print cylinder is rotated by a friction drive only while printing (during the print cycle). The print cylinder is rotated past the anilox roll (during the inking cycle), and the print cylinder is reset to the start position ready for the next printing cycle by a mechanical drive. The print cylinder is preferably less than 360 degrees around, and most preferably measures only 170 degrees around in a "short print" version and 270 degrees around in a "long print" version. The print cylinder is made from plastic. Printing plates are premounted permanently to a mylar carrier sheet that is designed with pin and hook holes that line up with pins and hooks that are part of the print cylinder. These plates have drive bearers as part of the mylar carrier sheet.

Abstract: An apparatus for adjusting the impression of an impression cylinder, equipped with a tube that can be slipped on, in a rotary press, the mounting of which apparatus has an eccentric bush equipped with a gearing, which is engaged in the operating state by an eccentric adjustment, which can be shifted out of the region of an opening enabling an exchange of tubes and is equipped with a gearing. A toothed quadrant, engaging the gearing of the eccentric bush, and a working cylinder, which is operated by a pressure medium and linked to the toothed quadrant, are pivotably connected with a rocking lever, which is mounted in the supporting frame and engaged by a two-membered driven toggle joint, which is pivotably connected at the other end with the supporting frame.

Abstract: In a printing machine with an impression roll and several printing mechanisms, the bearings of the size cylinders and the inking device supports can be moved with the screen rolls on guides of the printing machine stand, approximately radially to the impression roll. The drive of the size cylinders and of the screen rolls is derived from a central drive. In order to create a simple continuously running drive for the inking device rolls, the screen rolls are actively connected via a freewheel to the central drive. For the screen rolls, which can be moved away from the size cylinders, a continuously running drive is provided which consists of a toothed belt, driven by a servomotor, which loops around all of the toothed drive wheels of the screen rolls. The strands of the toothed belt and the strands of the toothed belt enclosing the respectively radial external idle wheels in a loop-like manner, extend in parallel with each other.

Abstract: A mounting for an impression cylinder equipped with a slipped on tube, in a rotary press. The axle journal of the cylinder is braced by way of a bearing an operating state against at least three supporting bodies. The supporting bodies can be shifted out of the area of an opening in a supporting frame to enable the tubes to be changed, as well as with respect to the position of the impression cylinder that is to be realized. The supporting bodies are supported in each case in the supporting frame so that they can be pivoted about an axis perpendicular to the supporting frame.

Abstract: An inking unit having a cantilevered inking roller and a cantilevered plate cylinder. The plate cylinder and the inking roller are mounted together and for horizontal displacement relative to each other. The plate cylinder and the inking roller are pivotally mounted both together as well as separately on pins arranged in the zone of the cantilever mounting.

Abstract: A web-fed rotary printing press having a main drive includes, in combination, a plurality of consecutively arranged printing units and a printing unit for flying printing-form exchange having an auxiliary drive and a plurality of printing-unit cylinders, at least one of which has a shaft, the plurality of printing-unit cylinders including two printing-form cylinder-transfer cylinder pairs for the printing-form exchange, and a common, rotating impression cylinder driven via the main drive, one of the cylinder pairs being inactivatable and the other being bringable into engagement with the common, rotating impression cylinder so as to be driven by the main drive, two gearwheels positioned on the shaft of the one cylinder of the printing unit for the flying printing-form exchange, including a drive for the respective printing-form cylinder-transfer cylinder pair which is decouplable from the main drive, during an imprinting operation, and connectable via a coupling device with the auxiliary drive, includes an ar

Abstract: An intermittent motion rotary printing press in which the inking cylinder and pressure cylinder are mounted in spaced apart relation on a single common bracket assembly which pivots between an inking step position and a print step position. The range of bracket assembly pivot motion is adjustable to define a first stop point at which the inking cylinder transfers ink to a printing plate and a second stop point at which the pressure cylinder confines a web in printing contact with the printing plate. One or more pneumatic cylinders operate to shift the bracket assembly between first and second stop points and hold the assembly at the selected stop point for inking or printing operations respectively.

Abstract: To permit ready exchange of the length of printed subject matter to be reproduced, particularly to make packaging cartons, the cut-off size of printing cylinders, as well as blanket cylinders of an offset machine is constructed, can be changed in this manner: The respective cylinders include a cylinder shaft (44, 45) on which a lightweight cylinder sleeve (3, 3a, 4, 4a) of different circumferential size can be placed.

Abstract: An apparatus for displacing bearing blocks which are mounted on carriages and which support shafts to be displaceable on a common carriage guideway, preferably for the displacement of bearing blocks of plate cylinders and inking rollers of an inking unit in carriage guideways of the inking unit brackets of a multicolour rotary printing press, with two lead screw drives driven by two electric motors, preferably stepper motors. Each bearing block is provided with a nut into which there is respectively screwed one lead screw assigned to each of the bearing blocks. Each of the two lead screws is provided with one lead screw drive each, fixed to the frame at the end zones of the carriage guideway lying opposite each other.

Abstract: A printing press (32) with a pair of plate cylinders (12A, 12B) each having a cylindrical body (22A, 22B) and a central axis of rotation (20A, 20B) mounted in fixed parallel spaced relationship, a pair of blanket cylinders (14A, 14B) located adjacent the plate cylinders (12A, 12B) with each having a cylindrical body (30A, 30B) and a rotary axis (24A, 24B) parallel to the axes (20A, 20B) of the plate cylinders (12A, 12B), having a blanket cylinder throw off apparatus (26) mounting the blanket cylinders (14A, 14B) in an operative position in engagement with the pair of plate cylinders (12A, 12B), respectively, and with their rotary axes (24A, 24B) in lateral alignment with the axes of rotation (20A, 20B) of the plate cylinders to reduce vibration and a throw off position in which a throw off gap (39) exists between the pair of blanket cylinders (14A, 14B) and a pair of gaps (403, 43B) exist between the pair of plate cylinders (12A, 12B), respectively.

Abstract: Method and device for automatically and semi-automatically starting and stopping a sheet-turning operation and for sheet-format adjusting during sheet transport through a recto-and-verso printing press, wherein the sheets are singly transported in succession, by at least one transport drum, between two printing units, wherein, with the aid of remotely operated actuating and position-locking elements, gripper-control elements and sheet-holding segments of a storage drum are disposed so that sheets are transfered from the storage drum to a turning drum by the leading or trailing edge of the sheets, depending upon the mode of operation thereof, the grippers being, with respect to a suction device, adjusted to an appropriate sheet format. Adjustment of the sheet format can be performed both in recto-printing mode as well as in recto-and-verso printing mode.

Abstract: An installation for supplying pressurized gas to pressure medium-actuated systems of a printing machine is disclosed. The installation comprises at least one compressor; a plurality of pressure tanks; and a plurality of sensors for measuring a system pressure, each of the pressure medium-actuated systems of the printing machine having at least one of the pressure tanks and one of the sensors associated therewith; pressure pick-off connections fluidically communicating with the pressure tanks; a pressure medium distribution and feed device for connecting an input side of the pressure tanks to the at least one compressor; the pressure medium distribution and feed device having actuators; and an electrical control apparatus controlling the actuators and the at least one compressor, the control apparatus being connected with the sensors and with the machine control of the printing machine.

Abstract: A self-locking mechanism (10) for selectively dynamically adjusting expansion bands (12) of a running cylinder (11) of a rotary printing press during rotation includes a cylindrical adjustment member (30, 72) with a diameter substantially the same as the diameter of the running cylinder which engages a band box (22, 80) rotating with the running cylinder (11) to make the selected adjustments in response to rotation of cylindrical adjusting member (30, 72) at a speed different from the speed of the running cylinder (11). The speed difference is produced by a differential (52, 75) stationary with respect to the running cylinder (11) which engages the cylindrical member (30, 72) and the running cylinder (11). The cylindrical adjusting member (30, 72) is mounted to the running cylinder (11) on an interrupted journal (35). The cylindrical adjusting member (30) has an inner engagement surface (38) for engagement with the band box (22) and another engagement surface (39) for engagement with the differential.

Abstract: When a screw 60 has been adjusted, a printing pressure adjusting disc 72 is turned through a shaft 75 and a segment gear 73 to adjust an eccentric pin through a link 78 and a lever 79. Also when the amount of eccentricity of a rubber cylinder 53 has been changed as a result of the adjustment of the stopper screw 60, the eccentric pin of each plate cylinder also is simultaneously adjusted in accordance with the amount of adjustment of the screw 60, and further the amount of eccentricity of the plate cylinder is changed to such a state that a printing pressure is kept constant in relation to the rubber cylinder 53, thus enabling the printing pressure adjustment with little labor and time to thereby improve printing operation performance.

Abstract: A method of driving the impression cylinder receiving carriages into the printing elements of a rotary printing machine whilst executing a simultaneous displacement of all the impression cylinder receiving carriages provided in the printing elements and of all the impression cylinder receiving carriages arranged in a waiting position in front of the printing elements, the displacement movement taking place in a first direction of advance and, for the subsequent driving-in of the impression cylinder receiving carriages, the latter being displaced simultaneously and together with the carriages located in the printing elements in the opposite direction.

Abstract: A printing unit (10) includes a frame (22), first and second brackets (50, 54), and upper and lower plate cylinders (14, 18). The first bracket (50) is supported on the frame (22) for movement relative to the frame (22). The upper plate cylinder (14) has an end supported to move with the first bracket (50). The second bracket (54) also is supported on the frame (22) for movement relative to the frame (22), and the lower plate cylinder (18) has an end supported to move with the second bracket (54). The printing unit (10) also includes a skewing mechanism and a throw-off mechanism. The skewing mechanism moves the brackets (50, 54) transversely relative to the frame (22) independently of each other. The throw-off mechanism moves the brackets (50, 54) pivotally relative to the frame (22).

Abstract: Apparatus for printing images on certain randomly selected ones of the pre-printed pages comprising a web. The pages are attached to one another end to end to form the web. The apparatus imprints in specific defined areas on the pre-printed pages fixed data in a color other than the color of the pre-printed information on the pages.

Abstract: An apparatus for controlling a contact pressure between a plate cylinder and a form roller includes a roller arm, an actuator, a plate, and strain gauges. The roller arm supports the form roller to be movable with respect to the plate cylinder. The actuator moves the roller arm so as to adjust a contact pressure applied by the form roller to the plate cylinder. The plate is brought into contact with an end shaft portion of the form roller and supported on a machine frame. The strain gauges detect a displacement of the plate to generate a signal.

Abstract: Disclosed is an offset printing apparatus, wherein the bearings of the blanket cylinder are mounted fixed on the cheeks of the cassette; the bearings of the plate cylinder comprise means for adjusting the position of the axis of the plate cylinder; and each of the front and rear cheeks of the cassette bears a mechanism for connection between mobile control means of the printing apparatus and the means for adjusting the bearings of the plate cylinder, in order to adjust the position of the axis of this cylinder as a function of the printing conditions required.

Abstract: A throw-on and throw-off device for a blanket cylinder in the printing unit of an offset press is provided wherein two parallel double-acting fluid pressure cylinders connected to the blanket cylinder via a toggle-like linkage can be individually supplied with compressed air either consecutively or simultaneously so that, in the first case, precise sequential throw-on of the blanket cylinder on the plate cylinder and subsequently on the impression cylinder can be achieved and, in the latter case, there can be a very rapid throw-off of the blanket cylinder from both the impression cylinder and the plate cylinder. Compressed air energization of the two pressure cylinders is triggered by a control unit in accordance with the position of grip edge zones of the blanket, plate and impression cylinders being in registration.

Abstract: A printing apparatus has an array of cartridges for printing a web of e.g. paper passing through the array, and one or more units containing printing medium. The cartridges each are capable of transferring the printing medium from the unit(s) to the web. The unit(s) and the cartridges of the array are relatively movable, to allow the unit(s) to interact successively with at least two of the cartridges. In this way it is possible to change printing from one cartridge to another, allowing changes to be made to what is printed, without halting the movement of web significantly. The present invention also proposes that the cartridges may have printing cylinders of different sizes, and furthermore that a mobile unwind stand may be used to move web material to the printing apparatus, and the web output from the printing apparatus processed by sheet folding techniques.