Abstract: A plate cylinder enables a printing plate to be attached thereto and is improved in strength. A plate cylinder is attached to a rotationally driven plate driving shaft, and is configured to mount a cylindrical printing plate attached thereon from a tip end side thereof. The plate cylinder is provided with a plate cylinder main body having a plate mounting surface to which the printing plate is attached. A flat portion is formed on a flat surface positioned further toward a radially inner side than the plate mounting surface. A plurality of hole portions is formed side by side in an axially separated state in the flat portion. A plurality of plate fixing members tightly fixes the printing plate to the plate mounting surface. The plate fixing members are fitted into the hole portions, and are provided to be movable in radially inward and outward directions of the plate cylinder.

Abstract: Liquid-cooled heat sink assemblies are provided which include: a heat transfer element including a heat transfer base with opposite first and second sides and a plurality of thermally conductive fins extending from the first side, and with the second side of the heat transfer base to couple to a component(s) to be cooled. The heat sink assembly further includes a coolant-carrying structure attached to the heat transfer element. The coolant-carrying structure includes a coolant-carrying base, and a coolant-carrying compartment through which liquid coolant flows. The coolant-carrying base includes a plurality of fin-receiving openings sized and positioned for the plurality of thermally conductive fins to extend therethrough. The plurality of thermally conductive fins extend into the coolant-carrying compartment through which the liquid coolant flows. In one or more embodiments, the heat transfer element is a metal structure and the coolant-carrying structure is a plastic structure.

Abstract: A transformer-inductor assembly includes a core, a primary winding, and a secondary winding. The primary winding is wrapped about the core. The secondary winding is wrapped about the primary winding. One or more ferromagnetic bars per phase are arranged between the secondary winding and the primary winding to control the inductance to the transformer-inductor assembly secondary winding. An electrical system including the transformer-inductor assembly and method of transforming voltage of alternating current using the transformer-inductor assembly are also described.

Abstract: Disclosed is a rollable display apparatus including: a flexible display panel that includes a pixel array; a roller part having a surface for winding the display panel; a first housing receiving the roller part and having a first opening through which a portion of the display panel passes; a rotational controller coupled between the roller part and the first housing, the rotational controller configured to: in a first state, enable the roller part to rotate in a first direction to unwind the display panel from the roller part but prevent rotation of the roller part in a second direction opposite the first direction, in a second state, enable the roller part to rotate in the second direction to wind the display panel onto the roller part, and switch from the first state to the second state responsive to receiving a triggering operation from a user.

Abstract: The invention provides a plate hanging device and an alignment film coating system. The plate hanging device includes a plate hanging part and a control part, wherein the plate hanging part is used for keeping the part of a transfer plate not coiled on a cylinder at a stretched state in a plate hanging process; the control part is used for controlling the cylinder to rotate to coil the transfer plate on the surface of the cylinder, the plate hanging device further includes a liquid spray part, the liquid spray part is connected with the control part and is controlled by the control part to uniformly spray a chemical reagent onto the surface to be jointed of the transfer plate to increase the friction between the transfer plate and the cylinder, and the surface to be jointed is a surface to be jointed with the cylinder of the transfer plate.

Abstract: A printing plate unit automatic mounting apparatus 81 includes: a pressing member 96 inserted from a pressing member insertion opening 33 and pressing an inner slider 36 against a biasing force applied by a printing plate coupling member biasing apparatus 35, a retaining means 94 configured to retain and release the printing plate unit 1 by retaining and releasing a projecting portion 11a provided on the printing plate unit 1 and configured to serve as a gripping portion; and a drive apparatus 92 configured to move the retaining means 94 in an axial direction of a plate drive shaft.

Abstract: In a flexographic printing system, both the process parameters and equipment setup and configuration may play a role in producing the desired printed pattern. One component of the equipment setup is the printer roller assembly which may comprise a roller and a flexoplate as well as tape. The properties of the flexoplate and the tape as well as the relative dimensions of each in the assembly may affect the geometry and quality of the transferred pattern, as well as the ability of the system to produce a pattern on a repeatable, consistent basis.

Abstract: An adapter sleeve has an external layer for supporting a printing cylinder carrying data and/or images to be printed. The adapter sleeve has an internal layer defining a bore enabling the sleeve to be mounted onto a rotary mandrel of a printing machine. Each opposite extreme end of the adapter sleeve includes a rigid, load-bearing, radial spacer member disposed between the layers to provide rigidity and indeformability during the use of the sleeve with time. The inner surface of each of the extreme end radial spacer members is defined by rigid and non-deformable material of very low coefficients of dynamic and static friction.

Abstract: The present invention provides a machine-plate mounting device for a printer which can attach a cylindrical machine plate to the printer more easily and accurately. A machine-plate mounting device 3 is fixedly provided on a machine-plate drive shaft 1 of the printer for mounting a machine plate 2 having a form area 5 provided on a portion of an outer circumferential surface of a machine plate body 4 formed from an elastic material into a cylindrical shape and an engagement portion 6 projecting radially inward from an inner circumference of the machine plate body 5 and extending in an axial direction. The machine-plate mounting device 3 includes a machine-plate cylinder section 12 fixedly provided on the machine-plate drive shaft 1 and having, on its outer circumference, a cylindrical machine-plate mounting surface 14 on which the machine plate 2 is mounted from a front-end side of the machine-plate drive shaft 1.

Abstract: The invention relates to a method for arranging a printing plate onto a plate cylinder that has a channel in which a front and a rear clamping device are arranged. The rear clamping device is part of a slide that is arranged to be movable towards the front clamping device along a clamping path. In a first phase of the clamping process, the slide, together with a rear printing plate end that is clamped into the rear clamping device, is moved towards a first channel wall, and the printing plate is thereby clamped. In a second phase of the clamping process, the printing plate is released again, and the at least one slide is moved away from the first channel wall and towards a second channel wall. In a third phase of the clamping process, the slide, together with the rear printing plate end that is clamped into the rear clamping device, is again moved towards the first channel wall, and the printing plate is thereby clamped.

Abstract: An adapter sleeve has an external layer for supporting a printing cylinder carrying data and/or images to be printed. The adapter sleeve has an internal layer defining a bore enabling the sleeve to be mounted onto a rotary mandrel of a printing machine. Each opposite extreme end of the adapter sleeve includes a rigid, load-bearing, radial spacer member disposed between the layers to provide rigidity and indeformability during the use of the sleeve with time. The inner surface of each of the extreme end radial spacer members is defined by rigid and non-deformable material of very low coefficients of dynamic and static friction.

Abstract: A clamping device for a printing cylinder with two holders arranged on a joint axis, the holders each having a recess for receiving one end of the printing cylinder and being arranged with their recesses oriented towards each other and positioned adjustably to each other, with at least one of the recesses having a contact surface on which the allocated end of the printing cylinder is held during clamping. At least one of the holders comprises a carrier and a contact element fastened on the carrier on which the contact surface is formed. The contact element comprises a material which has a higher current conductivity and/or thermal conductivity than steel. In particular, copper or a copper alloy is suitable as a material for the contact element.

Abstract: A printing plate cylinder for a printing machine has a rotatable cylinder mandrel and a sleeve that is at least partially positionable over the cylinder mandrel. The angular positions of the mandrel and the sleeve are alignable to each other by a male register element which is fixed on one of the two elements to be aligned, and a female register element which is part of the corresponding other element to be aligned. Both the male and female register elements remain in working connection with each other if the elements to be aligned are in the set position relative to each other. At least one of the male and female register elements is controlled by movement of the other element to be aligned.

Abstract: A plate for a magnet cylinder includes a main body, a nonmagnetic portion, and a magnetic piece. The main body is formed of a flexible thin plate-like magnetic material to be magnetically mounted on the outer surface of a magnet cylinder. The nonmagnetic portion is projected from one end of the main body. The magnetic piece magnetically sandwiches the nonmagnetic portion against the outer surface of the magnet cylinder.

Abstract: A printing assembly including a clamping annulus having a tiered circumferential end, an axial end and an oppositely axial end, the clamping annulus's axial and oppositely axial ends having outside diameters, the axial end outside diameter having with respect to said oppositely axial end outside diameter an excess dimension defining a guide sleeve receiving space within the clamping annulus; a matching cylinder annularly overlying the clamping annulus; a plurality of magnet recesses, each recess among the plurality of magnet recesses extending radially into the cylinder, and each recess among the plurality of magnet receiving recesses opening radially outwardly from the cylinder's outer surface; and a multiplicity of magnets, each magnet among the multiplicity of magnets being embedded within one of the recesses among the plurality of magnet receiving recesses.

Abstract: A blanket/plate mounting apparatus includes a leading edge holding unit, trailing edge holding unit, and first drive unit. The leading edge holding unit is movably supported by a cylinder and holds the leading edge of a blanket/plate. The trailing edge holding unit is movably supported by the cylinder and holds the trailing edge of the blanket/plate. The first drive unit moves the leading edge holding unit and the trailing edge holding unit that respectively hold the leading edge and trailing edge of the blanket/plate mounted on the circumferential surface of the cylinder, thus tightening the blanket/plate.

Abstract: A form cylinder of a printing machine includes a plurality of sections in series in an axial direction of the cylinder surface. At least one printing form is arranged in each one of these sections. The form cylinder has at least one channel, also extending in the axial direction of the cylinder. That channel has an opening on the surface of the form cylinder. At least one holding device for each of the sections is arranged in this channel. Each such holding device can be pneumatically actuated in sections. At least one recess, open to the cylinder surface, is formed outside of these sections. A device that is usable to distribute compressed air to the respective sections of the form cylinder is provided in this at least one recess. The device for distributing the compressed air is configured as a plurality of valves. At least one control device is provided outside of the form cylinder and is used to activate the plurality of valves in a non-contact manner.

Abstract: A method and apparatus of securing and tensioning a printing form in an apparatus having a rotatable drum, comprising positioning a first portion of the printing form over a first set of pins that are coupled to a surface of the drum. The first portion of the printing form is then stamped onto the first set of pins thereby securing the first portion of the printing form to the drum. A rotatable member having a second set of pins is rotated so that the circumferential distance between the first set of pins and the second set of pins, is about equal to the length of the printing form. The drum is rotated until a second portion of the printing form is positioned above the second set of pins. The second portion of the printing form is then stamped onto the second set of pins.

Abstract: Said machines comprise at least a first cylinder (1) for a printing plate, a second transfer cylinder (2) and a third cylinder, printing or counter-cylinder, with both first (1) and second (2) cylinders being hollow, through the interior of which a shaft (5, 6) is inserted belonging to the machine and in that said hollow cylinders (1, 2) of lightweight material, comprise rigid bearing rings (7, 8) located at the ends of the referred cylinders, with the same diameter or somewhat greater than the blanket or printing plate (4, 14), taking said diameter from the cylinder shaft (5, 6).

Abstract: A printing group of a printing press includes at least one form cylinder that has at least one axially extending opening on the external surface of the cylinder. That at least one axially extending opening forms a channel in the cylinder and in which channel several printing form end retaining assemblies are provided. These retaining assemblies are provided in the channel on both sides of a center plane which bisects the form cylinder perpendicularly to its axis of rotation. A first one of these retaining assemblies that adjoins the center plane cooperates with a second retaining assembly, located on the other side of the center plane, to both engage the same printing form, in a first mode of operation. In a second mode of operation, the first retaining assembly cooperates with a third retaining assembly, that is located further away from the center plane, and on the same side thereof as the first retaining assembly, to engage a second printing form.

Abstract: A cylindrically-shaped tube fitting over a cylindrically-shaped base body rotatable around an axis of rotation. The tube has a cylindrically-shaped inner surface defining a hollow region, a cylindrically-shaped outer surface, a first end, and a second end. The base body is arranged to fit either a sleeve or the tube. The outer surface includes vacuum grooves or a plate clamping system or both, and arranged to secure a flexible sheet of material around the outer surface of the tube.

Abstract: An assembly for a rotary press is provided including a hub which is suitable for being rotatably mounted about a center axis in a rotary press, a format adaptation sleeve and means for fixing the adaptation sleeve to the hub. The hub and the adaptation sleeve each include a stop surface. The stop surfaces have a frustoconical shape about the center axis, and the fixing means comprise a radial stop element which is suitable for being interposed between the hub and the adaptation sleeve.

Abstract: An apparatus and method for clamping printing plates on a plate cylinder is disclosed. A clamping element is integrated into a lockup slot of a plate cylinder with an actuating element. The clamping element is transferred by the actuating element between a first position, where the clamping element clamps the leading end and/or the trailing end of the printing plate, and a second position, where the clamping element releases the leading end and/or the trailing end of the printing plate. The clamping element can be adjusted exclusively in the radial direction of the plate cylinder and the actuating element exclusively in the axial direction of the plate cylinder such that, depending upon the relative axial position of the actuating element with respect to the clamping element, the clamping element is displaced either radially outwardly for clamping the printing plate or is displaced radially inwardly for releasing the printing plate.

Abstract: A cylinder of a printing machine is provided with at least one axially extending channel located beneath the circumferential surface of the cylinder. At least one plate end holding device is arranged in the channel and usable to exert a clamping force on an end of at least one printing forme or plate positioned on the assembly's circumferential surface. At least one control assembly is utilized to counteract the clamping force exerted on the plate end by the at least one holding device. A force that is exerted by the control assembly can be set to a value which is different either a maximum force or a minimum force which the control assembly can exert. Preferably, the circumferential surface of the cylinder can be divided, in its axial direction, into several adjacent sections. Several of the plate end holding devices are then arranged in the cylinder channel or groove and are positioned adjacent each other.

Abstract: An apparatus for a rotary offset printing press includes a print cylinder having a radially inward extending groove and a rubber blanket having a main section coupled to the print cylinder. The rubber blanket includes at least first, second and third layers in the main section. The first layer is a self-adhering layer which faces the print cylinder and is adapted to attach the rubber blanket to the print cylinder. The second and third layers are a support layer and a cover layer, respectively, which both face away from the print cylinder. The rubber blanket has a leading end section, as seen in a production direction of the print cylinder, and a trailing end section, as seen in the production direction of the print cylinder. The end sections directly adjoin the main section and at least the leading end section of the rubber blanket is inserted into the groove of the print cylinder.

Abstract: It is proposed to provide a printing die clamp which can clamp a printing die by rotating the take-up shaft without rotating the printing cylinder. A printing die clamp is proposed for clamping a printing die 1 wrapped around an outer periphery of a printing cylinder 2 of a printing press against the outer periphery of the printing cylinder 2 by engaging one end of the printing die 1 with the printing cylinder 2 through an engaging means 18 provided on the printing cylinder 2, engaging the other end of the printing die 1 with a take-up shaft 3 rotatably mounted in a receiving groove 19 formed in the outer periphery of the printing cylinder 2, and rotating the take-up shaft 3. The printing cylinder 2 has a tubular printing cylinder shaft 9 in which a control shaft 5 is inserted so as to be rotatable relative to the printing cylinder shaft 9.

Abstract: A printing group of a printing press includes at least one forme cylinder that has at least one axially extending opening on the external surface of the cylinder. That at least one axially extending opening forms a channel in the cylinder and in which channel several printing forme end retaining assemblies are provided. These retaining assemblies are provided in the channel on both sides of a center plane which bisects the forme cylinder perpendicularly to its axis of rotation. A first one of these retaining assemblies that adjoins the center plane cooperates with a second retaining assembly, located on the other side of the center plane, to both engage the same printing forme, in a first mode of operation. In a second mode of operation, the first retaining assembly cooperates with a third retaining assembly, that is located further away form the center plane, and on the same side thereof as the first retaining assembly, to engage a second printing forme.

Abstract: A rotating member of a printing press is typically a cylinder that is provided with a circumferential area. A securement channel or a flow channel, which is at least partly open toward the circumferential area of the cylinder, is formed in the cylinder. A profiled member, which at least partly covers the securement channel or flow channel, with respect to its circumferential area, is inserted into the cylinder to form an integrated joint with the cylinder.

Abstract: This printing plate (6) for a rotary press includes a head (22) for fastening to an impression cylinder, and a tail (24) for fastening to the impression cylinder. The fastening head (22) includes a holding projection (28) suitable for mating with an element (34) for holding the impression cylinder.

Abstract: A protection ring for a printing sleeve such as a sleeve or cylinder carrying the characters to be printed, or an adapter sleeve for supporting said sleeve or cylinder, the sleeve to be mounted on a rotary mandrel provided with a register pin, can include an annular body to be disposed on an end edge of the sleeve. The body defines a first coupling member for its detachable coupling to the sleeve, which is provided with a second coupling member for cooperating with the first coupling member. The body includes a register notch for cooperating with the mandrel's register pin. The body includes a first orientation element for properly orienting the ring on the sleeve, to enable the ring to be disposed on the sleeve such that the register notch lies in a position suitable for cooperation with the register pin.

Abstract: An adapter sleeve has an external layer for supporting a printing cylinder carrying data and/or images to be printed. The adapter sleeve has an internal layer defining a bore enabling the sleeve to be mounted onto a rotary mandrel of a printing machine. Each opposite extreme end of the adapter sleeve includes a rigid, load-bearing, radial spacer member disposed between the layers to provide rigidity and indeformability during the use of the sleeve with time. The inner surface of each of the extreme end radial spacer members is defined by rigid and non-deformable material of very low coefficients of dynamic and static friction.

Abstract: A holding apparatus holds a flexible plate wound on a circumferential surface of a holder of a printing machine. A holding apparatus includes a hole section made in the holder along an axial direction of the holder, a groove section made by notching the circumferential surface of the holder along the axial direction to establish a connection with the hole section and accept insertion of a leading edge end portion and trailing edge end portion of the plate, a tension bar inserted and fitted into the hole section for engaging the trailing edge end portion of the plate, and a rotating mechanism provided in the hole section for rotating the tension bar.

Abstract: In the case of a blanket holding rail for the releasable attachment of a blanket (12) on a printing mechanism roll comprising two holding limbs (13a and 13b) having an elongated configuration, and joined together by way of a back portion (14) and between which the blanket (12) may be clamped and be so fixed by means of additional securing means that the blanket (12) is secured to avoid its being pulled out athwart the longitudinal direction of the rail, the additional securing means are constituted by a claw means (16), which digs into the material of the blanket on clamping the blanket (12) in position.

Abstract: Disclosed is a clamping device (02) for fastening a plate (03) to the periphery of a cylinder (01). Said clamping device (02) comprises a first clamping element (04), a pivotally mounted second clamping element (06), a spring part (07), and a bracing element that is embodied as a pivotable spindle (08) and is movable between a clamping position in which the bracing element maintains the plate in a clamped state between the clamping elements and a released position in which the clamping elements release the plate. The spindle (08) is mounted in a groove so as to be displaceable, is fixed in an intermediate space between the spring part (07) and the second clamping element (06), and is pressed against the second clamping element by means of the spring part in the clamping position.

Abstract: A clamping device for a printing cylinder with two holders arranged on a joint axis, the holders each having a recess for receiving one end of the printing cylinder and being arranged with their recesses oriented towards each other and positioned adjustably to each other, with at least one of the recesses having a contact surface on which the allocated end of the printing cylinder is held during clamping. At least one of the holders comprises a carrier and a contact element fastened on the carrier on which the contact surface is formed. The contact element comprises a material which has a higher current conductivity and/or thermal conductivity than steel. In particular, copper or a copper alloy is suitable as a material for the contact element.

Abstract: A system and method for adhering and aligning a generally flat, planar object to an adhesive layer, and for facilitating the mounting of the generally flat planar object, such as a printing plate, in near perfect alignment in a cylindrical manner. The method includes providing a generally flat, planar object such as a printing plate and an adhesive member having an adhesive layer at least on one surface. The adhesive member is preferably approximately the same size as the printing plate. The printing plate is mounted to the adhesive member such that there is one edge of the adhesive member which is not initially covered by the printing plate and one edge of the printing plate which overhangs the adhesive member. The combined adhesive member/printing plate structure is next rolled into a cylindrical form and held in place on a device which allows alignment marks on the printing plate to align the two ends of the printing plate prior to the printing plate being fully adhered to the adhesive member.

Abstract: In a balancing system and a method for balancing a drum of a printing plate exposer, at least one mass element is provided which can be moved substantially in the circumferential direction of the drum in order to reduce an imbalance of the drum. Previous devices and methods either needed the expertise and the knowledge of a user or external actuators which had to be driven by corresponding devices, for example computers, in order to compensate for an imbalance by moving the mass elements. The balancing system is simple and automatic balancing of the drum is achieved by a mass element being coupled to a positioning element and by its position being adjusted automatically on the basis of the circumferential extent of the printing form.

Abstract: An ink transfer device which can be clamped on a rubber covered cylinder in a printing press includes a rubber blanket for transferring ink from a printing forme to a printing material, the blanket having a leading end and a trailing end which are separated by a non-ink transferring gap when the device is clamped on the cylinder; a carrier element fixed to the rubber blanket; and a pair of fixing elements for clamping the blanket on the cylinder, the fixing elements being positioned on the carrier adjacent to respective ends of the blanket. In order to minimize the non-ink transferring gap, the fixing elements and the carrier element are formed as separate subassemblies which are joined together.

Abstract: A tensing means for a tensing channel of a cylinder body comprises a clamping piece for clamping a first cover end and for clamping a second cover end between the clamping piece and a tensing piece, wherein at least one contact region of the clamping piece and/or tensing piece, used to clamp a cover end or printing cylinder end, is formed to be roughly linear.

Abstract: A method and apparatus for securing a printing plate on a plate cylinder is disclosed. A tensioning bar is moved by an actuating device toward an entrance slot defined by an outer circumferential edge of the cylinder to engage a rear end of the printing plate. The tensioning bar is disposed on a profile body disposed within a channel defined by the cylinder and extending parallel to an axis of the cylinder. The actuating device is disposed in the profile body. The tensioning bar is then moved away from the entrance slot by the actuating device to exert a tensioning force on the rear end of the printing plate.

Abstract: A clamping device for clamping a flexible packing (2, 3) of a cylinder (1) of a printing press, which cylinder has an axial channel (6) on a jacket surface, the clamping device includes a clamping body (10), which has a surface (S) that forms in the channel (6) with an opposite surface (4) a clamping gap for at least one end of the packing (2, 3) protruding through an opening (7) of the channel (6). A pressing device (13; 14; 10a) presses the clamping body (10) and the opposite surface (4) against each other with a clamping force (F). A mounting device (12; 14; 1, 8), which forms a support surface (9; 14?; 9?), touches the clamping body (10) and the clamping body (10) is supported on it.

Abstract: A plate cylinder includes a cylinder including a longitudinal axis and a centroid located at a geometric center of the cylinder. The cylinder also includes a slot for receiving both ends of a printing plate; the cylinder including a counter balance hole extending axially in the cylinder and being displaced from the longitudinal axis, the counter balance hole balancing the slot; and the cylinder including a mass balance hole extending axially in the cylinder and being displaced from the longitudinal axis, the mass balance hole balancing the plate cylinder. The cylinder further including at least one hole extending axially in the cylinder and being displaced from the longitudinal axis of the cylinder to reduce the variation in products of inertia as the plate cylinder rotates. A cylinder is also provided. A method is also provided.

Abstract: A process for the manufacture of rollers for the printing of laminar materials, a machine for carrying out the process and a printing support for printing rollers. A printing support is wholly manufactured within an irradiating machine equipped with visible marks located on the lower plate and on the machine. The laminar support supports the plates positioned on a dimensionally stable substrate sheet on which marks are made accurately in the same location relative to the overall image as a reference axis for subsequent positioning on the roller and on which also matching marks are printed or engraved. Some of these marks are repeated on films which restrict the passage of ultraviolet light, one of the films having transparent areas which present elements of one colour of the image which has to be printed while the remaining film represents mounts surrounding such elements.

Abstract: A plate lock system for use with cylinder slots having inwardly-angled slot walls. The system includes at least one lead clamp assembly having at least one lead clamp positioned adjacent at least one inwardly-angled slot wall, at least one trail clamp assembly having at least one trail clamp, and at least one register assembly having at least one register. At least one of the lead clamp assembly, the trail clamp assembly and the register assembly is a modular assembly having moving parts that are assembled together in a manner that allows limited relative movement between the moving parts. The modular assembly can be installed into the print cylinder slot through the slot opening without disassembling the moving parts. Also provided are printing plate clamp assemblies, a printing plate lock systems, and printing plate register assemblies.

Abstract: A printing cylinder having an axis-parallel channel in the cylinder, the channel narrowing toward the surface to form a slot for receiving the ends of a covering; a clamping member arranged in the channel and urged toward the slot by springs, the clamping member having at least one recess facing a respective at least one wall of the channel; and at least one supporting element arranged inside the channel and engaging a respective recess of the clamping member. A pair of adjusting elements arranged at the ends of the cylinder support the clamping member so that the clamping member can be radially displaced, the adjusting elements being arranged so that movement of the adjusting elements causes relative movement between the supporting element and the clamping member, whereby the clamping member is caused to move radially for clamping and unclamping the ends of the covering in the slot.

Abstract: Depending on the lateral width thereof, an image recording material P is stably positioned on a recording drum, employing two positioning pins with an appropriate pitch therebetween. Non-contacting portions prevent any irrelevant positioning pins from coming into contact with the material P. The material P may be transported onto the recording drum 5 while one end thereof constitutes an angle U with a rotation axis 5N of the recording drum 5. A reference notch 44ae first fits with a positioning pin 51a. Thereafter, as the aforementioned end of the material P abuts with a positioning pin 51b, accurate positioning occurs. Each positioning pin 51 includes a tapered portion having a reference taper angle 2T. When a leading-end clamp 52 clamps the aforementioned end, the material P comes in contact with the tapered portion, with a, reduced friction force against the positioning pin 51, thereby preventing deformation of the material P.

Abstract: An apparatus and method for reducing oscillations in a web-fed rotary press are disclosed. The apparatus includes a form cylinder of a web-fed rotary press, having at least one clamping device for fastening at least one printing plate on the form cylinder. The clamping device has at least one clamping element which is positioned in a clamping channel. As seen in a circumferential direction, the clamping channel of the form cylinder has an effective clamping-channel width of at most 7 mm.

Abstract: A cylinder of a printing unit of a web-fed printing press includes a cylinder channel which receives plate ends and includes plate end retaining devices. A remotely controllable actuating device or an actuator is located in the channel. The actuating device, or actuator is preferably a piezoelectric system or is in the form of a magnetostrictive system. This actuator is usable, preferably during continuous printing, to shift a plate end retaining device inside the channel in an axial direction of the cylinder to achieve an improved register precision and lateral register precision. The device makes it possible to counteract the influence of a transverse strain imposed by the material to be printed and acting transverse to its direction of conveyance, such a transverse strain having an effect on a common printed image that is printed at different positions of the printing unit.

Abstract: The present invention relates to an improved compressible flexographic printing plate that uses a compressible layer comprising a polyurethane (meth)acrylate resin and microspheres. The process of the invention produces a chemically fused printing plate that eliminates the need for an adhesive to secure the compressible layer to the back of the printing plate.

Abstract: At least one dressing, such as a printing forme, is secured to the surface of a cylinder of a rotary printing press by securement devices. These securement devices are arranged in an axially extending channel on the surface of the cylinder. The channel is defined by at least one wall and by an opening directed toward the circumferential surface of the cylinder. At least one wall of the opening extends into the channel at an acute angle with respect to the cylinder circumferential surface. A deflection-resistant retaining device, provided with a first end and with a second end, is pivotably mounted in the channel. The first end holds an angled end of the dressing that is introduced into the channel opening. This first end is disposed remote from a bearing and pivoting point of the retaining device. A dimensionally stable bow, which has a portion that engages the wall of the opening that extends toward the channel at an acute angle, is situated in the channel.