Abstract: Printing apparatus with quickly changeable printing plate, the impression cylinder being mounted on the drive side of the machine and the remaining end of the impression cylinder being arranged to be freely floating in order to permit an unhindered attaching or fitting of the printing plate on the cylinder.

Abstract: A bank check endorser is provided that permits endorsement in each of three discrete locations along the length of the reverse side of a check. The endorser unit utilizes a one-way clutch along the drive shaft to permit movement of the drive mechanism for the print cylinder. By releasing a latch mechanism, the housing portion, which contains the drive mechanism and the print cylinder, is moved along the length of the drive shaft to a second position.

Abstract: An impression roller for an electostatic printing assist system consists of a metal roller core, a relatively thick insulating layer of substantially uniform thickness covering the main body of the core, a relatively thin intermediate conductive layer covering the insulating layer and a relatively thick semiconductive layer covering the intermediate layer. The relatively thin conductive layer is exposed at one end of the roller so it can make contact with a rotary transformer. In a first embodiment of the invention the roller core is tapered at one end and the slope of the tapered end built up with semiconductive material. In a second embodiment there is an annular groove which is cut into the conductive layer to provide improved contact with a transformer. A method of preparing rollers is also disclosed.

Abstract: In an intaglio printing press, a sheet printed by an impression cylinder impressed on a plate cylinder, ink rollers for transferring ink impressed on said plate cylinder and the sheet transmitted with held by the impression cylinder and the plate cylinder after the sheet fed from a feeder transmitted from an upstream of a feeder board to a downstream of the feeder board, the ink rollers are impressed on when the first sheet from starting sheet supply is positioned at the upstream of the feeder board and the impression cylinder is impressed on when the first sheet is arrived at the down stream of the feeder board so that an impression-on timing is hastened so as to transfer an ink on the plate cylinder to the first sheet when the first sheet is arrived between the impression cylinder and the plate cylinder, and the sheet supplying is stopped and the ink rollers and the impression cylinder are thrown off impression when an irregular register occurs in a printing operation.

Abstract: A rotary printing press for printing strip paper, wherein a pressure roller is supported for rotation at each end by a pair of jaws of a supporting device on the printing unit. The jaws are lifted and lowered, together with the pressure roller, by a lifting device, and are opened and closed by an actuating device via a prismatic joint defined by a fixed portion and a portion moving with the jaws. The two portions of the prismatic joint mate in sliding manner as the jaws are moved by the lifting device, and, when mated, rotate integral with each other.

Abstract: A printing press having an impression cylinder with a bearing at each end an image carrier cylinder and a frame in which both cylinders are positioned. A device is provided for moving the impression cylinder between an engaged printing position cooperating with the image carrier cylinder and a disengaged position and also for producing a larger motion of the impression cylinder for the purpose of replacing the image carrier cylinder. A lead screw is provided for each bearing for lifting and lowering the bearing of the impression cylinder and a thrust piston and cylinder unit for acting on each bearing for urging the impression cylinder towards the image carrier cylinder. A nut engages each lead screw, each nut having a tubular section with a constant external diameter, and a pinion is mounted on each tubular section, and having a hub supported for pinion rotation in a fixed position relative to the frame.

Abstract: An inking unit for a gravure printing press has an ink trough which is movable vertically with respect to a forme cylinder which contacts ink in the trough. An inking roller is supported by levers in the ink trough and is shiftable with respect to the trough to control the impression pressure between the inking roller and the forme cylinder which it contacts.

Abstract: An impression cylinder provided with a replaceable sleevelike impression cylinder shell is movably and releasably mounted in a printing press by a bearing in such a manner that the impression cylinder adjacent to its one stub shaft is adapted to protrude freely from the machine frame and permit replacement of the impression cylinder shell. In order to permit a particularly simple replacement of the impression cylinder shell, the bearings are hinged bearings having bearing shell sections which can be swung off to a position in which they permit the impression cylinder to be swung out in a horizontal plane. The impression cylinder is provided at one end with a stub shaft, which extends beyond the associated hinged bearing and which at the top of its end portion is supportedd by a supporting shell section, which is axially immovably mounted in the machine frame for rotation about a vertical axis.

Abstract: Within the impression cylinder of a rotogravure press and within the roll shell thereof there are provided over the width of the impression cylinder a number of layer packages which can be separately supplied with electrical charge in order to apply electrostatic charges to the impression cylinder surface for the purpose of augmenting printing of a material web. By differently controlling segments of the impression cylinder, there can be accommodated different widths of the material web to be processed. In order to concentrate the electric charge at the actually used region of the impression cylinder and for protecting the zones of the impression cylinder which are not currently being used, there are provided internally of the roll jacket, in axial direction thereof, a number of support elements arranged adjacent one another and braced against a central carrier.

Abstract: The arrangement has a device for cooling the impression cylinder (2) with a plurality of continuous metal belts (6) which run over two drums (4, 5) which partially wrap the impression cylinder (2) and are carried along by the latter during its rotation. These metal belts discharge the heat arising at the surface of the impression cylinder during the printing operation and are themselves cooled by the fact that one of the two drums (4) is constructed as a hollow cooling drum through which a cooling means flows. The drums (4, 5) are mounted in an adjustable frame (7) and, when the printing machine is switched off, can be removed from the impression cylinder (2) to the extent that the latter is not contacted by the metal belts (6).

Abstract: A mounting and drive assembly which is designed to easily, rapidly and accurately remove and replace a cylinder such as a transfer cylinder of a gluing unit that may be provided in associated with a web printing press.

Abstract: A rotogravure printing press includes a boundary layer air scraper which is located immediately upstream of the pinch area of the press (e.g. the area formed by the impression roller and the printing cylinder). The air scraper blocks boundary layer airflow drawn with the moving web. This reduces the solvent laden air and allows a reduction in the capacity of the scavenger system.

Abstract: The intaglio printing machine comprises a plate cylinder (4) with a plurality of engraved printing plates equipped with intaglio cuts representing the elements of a main design and with less deep and finer intaglio cuts representing the elements of a safety background, an impression cylinder (3), a wiping device (10) and a multicolor inking system. This inking system consists of a collector inking cylinder (5) having an elastic surface interacting with the engraved plates mounted on the plate cylinder (4) and having the same diameter as this. The collector inking cylinder (5) is inked by as many selective color inking cylinders (7) as there are colors to be printed, these selective color inking cylinders (7) having reliefs corresponding to the colored zones of the safety background and of the main design, an inking device (8) being associated with each selective color inking cylinder (7).

Abstract: A counter pressure cylinder including an electrostatic printing assist system, with the counter pressure cylinder including an insulating jacket having a conductive coating thereof over which a further coating is arranged having limited conductivity. A primary winding, concentric to an electrically grounded axle or shaft of the counter pressure cylinder, is disposed beside the counter pressure cylinder in a fixed fashion with respect to the printing unit, and a secondary winding is mounted concentrically to the electrically grounded shaft of the counter pressure cylinder at one end face of the counter pressure cylinder in a fixed fashion with respect to the counter pressure cylinder. An electrical connection of the secondary winding is connected to the axle of shaft of the counter pressure cylinder and another electrical connection is connected to the coating by way of a rectifier circuit.

Abstract: A rotary die hold down unit (10) is carried between opposed sideframes (12) of a printing press and includes a clamping unit (14) carried by each sideframe and a cross member (22) extending between said clamping units. The clamping units each include a base (34) having quick-release pins (62) for attachment to the sideframes. The sideframes include vertical slots (18) and an elongate adjustment member (52), is received by an adaptor sleeve (48) threadedly connected to the base and extending into the sideframe slot, the adjustment member and the sleeve cooperating to provide coarse and fine adjustment capability of the adjustment member. The cross member includes pressure blocks (20) at each end received within the sideframe slots for engagement by the adjustment members, and a pair of spaced roller blocks (24) having rollers (26) engageable with the rotary die (32) respectively at points on each side of the axis of rotation of said rotary die.

Abstract: A gravure printing press includes a scavenger located adjacent a pinch formed by an impression roller and a printing cylinder. The scavenger captures air drawn to the printing clinder which has become laden with solvent from ink on an outer surface of the cylinder, to minimize the dispersion of the solvent laden air to the area surrounding the press.

Abstract: A pitted roll for an offset litho press inking unit, more especially as part of a short inking unit, has a dual coating layer of which the inner layer is formed of a material such as copper comprising the application of a high affinity for ink and the outer layer is formed of ceramic material to give lands wiped by a doctor, preferably set at a negative angle, around the pits. A high wear resistance and a high accuracy may be achieved if the plain base member of the roll is coated with copper or the like and then with ceramic material, after which engraving takes place to penetrate the ceramic layer right into the copper or the material with an affinity for ink.

Abstract: An intaglio printing press is disclosed employing cantilevered press rollers which can be easily removed and replaced, and which are supported to apply high uniform printing pressure to a substrate web. The rollers are each mounted on a spherical bearing permitting them to cant such that their axes remain parallel. One roller shaft is fixed to a frame and the other is carried by deflectable slides carried by the frame. The high printing pressure is achieved by shifting one shaft by driving the slides with hydraulic rams against adjustable stops formed by movable wedges.

Abstract: A rotary safety contact featuring dual brush contacts, contained within an isolating housing, shielded from the environment, purged with compressed air to prevent the entry of potentially explosive vapors, and adapted to be connected to a conductive cylinder/roller for electrostatic assist rotogravure printing is disclosed and described.

Abstract: A method and associated apparatus for applying a charge directly to an impression roll (12) which engages a gravure cylinder (14) of an electrostatic assist gravure press, wherein the improvement comprises the steps of placing a plurality of spaced contacts (26 or 54) capable of applying a charge to the impression roll (12) in direct contact with the surface of the impression roll (12), arranging the spacing between the contacts (26 or 54) and the width thereof so that predetermined groupings of the contacts (26 or 54) correspond to approximately the various web widths to be used with the gravure press, and controlling the charge applied by the contacts (26 or 54) to the surface of the immpression roll (12) to minimize the current leakage between the impression roll (12) and the gravure cylinder (14) in those areas of the impression roll (12) where the impression roll (12) directly engages the gravure cylinder (14) without the interposition of a web (22) therebetween.

Abstract: Intaglio printing cylinder, comprising a core of a virtually undeformable material and a multilayer sleeve joined releasably thereto. The new intaglio printing cylinder especially is more durable than prior cylinders of a similar type, and it is interchangeable with conventional solid metal intaglio printing cylinders. The new intaglio printing cylinder is characterized by the fact that on the outside of the first, inner layer of the sleeve a plurality of ribs projecting outwardly and running substantially in the longitudinal direction of the cylinder are disposed. This intaglio printing cylinder has an improved stability, especially against circumferential shifting or displacement within the sleeve and thus is more durable. An additional improvement of its working characteristics is achieved by a continuous electrical continuity from the core to the outer copper layer. The new intaglio printing cylinder is especially suitable as a substitute for the solid metal printing cylinders still in use.

Abstract: To permit re-lining of a printing machine cylinder (9), while retaining the printing machine cylinder in adjusted position with respect to a reference, for example an associated cylinder, the side wall (1) of the printing machine is formed with an opening (2) sufficiently large to permit placing of a sleeve (14) over the cylinder. The cylinder shaft (8) is retained, prior to re-lining, in eccentric adjustment by a jaw chuck (3), preferably having three jaws (16, 17, 18) arranged in a star pattern and surrounding the shaft or the bearing, or an eccentric element thereof; the jaws of the jaw chuck are so placed that they can be withdrawn to clear the opening.

Abstract: A method and apparatus for printing repeat patterns of various lengths from a printing apparatus with a limited number of printing cylinders by driving the web being printed and the rotary printing means at a predetermined speed ratio. An impression element for pressing the web against the rotary printing cylinder has an impression portion with a radius of curvature in a range of from 2 mm to 70 mm.

Abstract: A coating feeder system is disclosed herein. The coating feeder system comprises, in close vicinity to an outer peripheral surface of a gravure roll, a coating container or vessel defining a reservoir for storing a coating under a pressurized condition and a stirring mechanism for stirring the coating within the reservoir. The stirring mechanism may be a stirring and feeding roll mounted within said reservoir. The stirring and feeding roll includes forcedly stirring means formed on an outer peripheral surface thereof for forcedly stirring the coating.

Abstract: In an image recording apparatus in which an image optically formed on a photosensitive material is transferred as a visible image onto an image receiving material by pressurization, a back-up roller is employed to press a free nip roller against a fixed nip roller so that the pressure at the nip region of the two nip rollers is made uniform over the entire length thereof. The back-up roller has a width smaller than the width of the free nip roller against which it presses, and the back-up roller presses only against a central portion of the free nip roller.

Abstract: An apparatus and method for loading a mandrel-mounted roll into an uncoiler, which utilizes a pair of rotating contoured plates for engaging the ends of the mandrel. The rotating plates each having a lifting hook, a placing hook and a cam surface between the hooks, with the cam surface contoured to clear obstructions between the loading position and the production position as the plates rotate to translate the respective hooks therebetween.

Abstract: A method for conducting a proofing operation of a rotogravure printing cylinder includes preparation of a steel drum having in sequence from the outer steel surface a layer of plastic such as Mylar.RTM., a blanket consisting of a rubber composite material, a paper/foil layer with the foil side facing outwardly, and a proofing sheet consisting of normal printing paper. The rotogravure cylinder which is to be proofed is brought into contact with the thus-prepared drum, and a high voltage is applied to the foil via the proofing sheet. The rotogravure cylinder is inked and rotated through one printing revolution so that a complete impression is made on the proofing sheet. The high voltage assists in the transfer of ink from the cups of the rotogravure cylinder to the proofing sheet. The impression produced by the rotogravure cylinder can then be checked before the rotogravure cylinder is sent to a user.

Abstract: In a gravure printing with liquid ink upon a dielectric surface of a substrate such as paper, transfer to the substrate of a gravure ink having a conductivity of the order of about 5.times.10.sup.-6 mho/cm. is improved by creating, at the nip between the gravure cylinder and its impression roll, in the ink in the gravure cells at that nip, a charge whose intensity is sufficient under action by the field to overcome the surface tension forces that normally form a concave meniscus on the ink in those cells so that a portion of the surface of the ink in such cells bulges above the surface of the gravure cylinder and wets the surface of the substrate in contact with the gravure cylinder at that point.

Abstract: A hybrid printing process wherein an ink fountain cylinder is provided with a gravure image carrier portion and an anilox ink metering portion. A cylinder associated with the ink fountain cylinder is provided with a blanket transfer portion and a flexographic image carrier portion. The images carried by the gravure and flexographic portions are imprinted at one or more stations to create a total design on a flexible plastic substrate.

Abstract: An apparatus for lining a form cylinder for gravure printing with a wrap-around plate is characterized by a machine frame having insertion apertures (3) provided in the area of its side walls (2) and allocated to the lateral journals (4) of the form cylinder (5), and having a swivel frame (10) which is pivotably mounted outside the insertion apertures (3), can be fixed relative to the machine frame and accommodates a drivable pressing roller (7) mounted in rotatable eccentric bushes. In this way, the wrap-around plate can be rolled onto the form cylinder, so that a full, uniform seating of the wrap-around plate on the cylinder periphery is ensured even when the form cylinder possesses no adjustable clamping device.

Abstract: The splattering of ink droplets in rotogravure printing onto plastic film is eliminated by an improved rotogravure process. There is applied to the surface of the rubber impression cylinder, a coating of a polymeric substrate which is triboelectrically more positive than the plastic film which is to be printed. When the coated impression cylinder makes contact with the plastic film, a negative charge is triboelectrically imparted to said film, thereby eliminating the static attraction between the film and the negatively charged ink.

Abstract: An intaglio printing machine includes a plate cylinder having a plate thereon, a pattern roller having projections which are in rolling contact with the outer surface of the plate, and an inking unit with a duct roller which is in rolling contact with the pattern roller, wherein the duct roller has substantially the same diameter as that of the pattern roller which includes the projections, and ink holding recesses having different depths corresponding to those of the plate are formed in the outer surface of the duct roller along the circumferential and axial directions thereof.

Abstract: A flexible thinwalled sleeve for gravure printing is provided, which, going from inside to outside, essentially consists of(1) a slightly conical layer of nickel to provide mechanical strength,(2) a layer of copper, having the structure of high-gloss copper and which is essentially free of internal stresses, said layer having a cylindrical outer surface,(3) a thin, cylindrical layer of hard copper having a structure suitable for electronic engraving and having a gravure pattern on its outer surface, and if desired,(4) a thin protective layer of chrome.These layers are all firmly adhered to each other and especially the two layers of copper cannot be separated by peeling off. Since a high-gloss copper layer, which is free of internal stresses, has been found unsuitable for electronic engraving, and since the layer of hard copper, suitable for electronic engraving, has been found to have internal stresses, which would be unacceptable in the first layer of copper, the two layers must necessarily be different.

Abstract: The printing unit (1) operating with an electrostatic printing aid has an inductor device (7) for transmitting an electrostatic charge to an outer-shell layer (5) of a back-up cylinder (4). The inductor device is provided on one end face (14) of the back-up cylinder and engages over this end face in the manner of a lid. A continuous annular air gap (15) is located between the end face and the inductor device. Inductor electrodes (9) serve for transmitting the electrostatic charge to the outer-shell layer in a contactless manner and are arranged, concealed against outside access, on the inner face of the inductor device and are aligned by means of their electrode tips with an end-face edge (10) of the outer-shell layer (5). So that no impurities can penetrate into the air gap, it is sealed off or constantly scavenged by compressed air.

Abstract: The invention concerns a rotating printing device and process for transferring a product from an engraved printing cylinder to a continuously moving web. A press or presser roller is adapted to provide a contact zone with the web and to apply the contact zone against the printing cylinder during the transfer of the product to the web. The device includes an enclosure adapted to enclose both the contact zone and a container for containing the product. Gas flow means are included for providing a flow of temperature controlled gas so as the temperature of the contact zone and the temperature in the product container at substantially equal. The process includes the step of flowing a gas in the enclosure to substantially equalize temperature of the contact zone and in the product container.

Abstract: In a rotary gravure press in which the journal bearings of the impression cylinder are each connected to a piston rod of the double acting piston-cylinder units serving to raise and lower the impression cylinder, the piston rods extend out of the cylinders and are rotatably but axially undisplaceably mounted in the journal bearings. On the sides opposite to the piston rods, spindles which are screwed into the pistons are provided with unthreaded portions on which worm wheels are secured against rotation but to allow limited axial displacement through a distance corresponding to the stroke between impression throw-on and throw-off.

Abstract: This direct plate printing or copperplate machine comprises a plate carrier cylinder with at least one engraved or etched plate provided with cuts corresponding to the elements of a main design and shallower, finer cuts corresponding to the elements of a safety background, an impression cylinder, an inking roller cooperating with an inking unit and being in direct contact with the plate for inking the cuts corresponding to the elements of the main design, a pre-wiping device and a wiping device, and an inking system for inking the cuts corresponding to the safety background in several colors.

Abstract: A gravure pressure roller with an axis of variable shape, in which the outer jacket (2), rotated coaxially to and inside the jacket (2) of the roller by the shaft (3), is supported at its ends by bearings (10) and at the mid-part by levers (21) coupled in an articulated manner to the mid-part of the shaft (3), so as to be in contact with the inner surface (7) of the jacket (2), contacting the same with the intercalation of bearings (22) and actuators (15) inserted between the shaft (3) and each lever (21).

Abstract: A convertible, multicolor, printing press for printing the safety background of banknotes or the like comprises, in one configuration, an impression cylinder, a second blanket cylinder which engages the impression cylinder, a first plate cylinder which engages the second blanket cylinder and also engages a first blanket cylinder which first blanket cylinder is spaced from the impression cylinder, and several sectioned inking rollers which engage the first blanket cylinder and which are each inked by inking devices of different colors. The printing press is converted to a second configuration by exchanging the sectioned inking rollers for second plate cylinders, separating the first plate and second blanket cylinders from engagement with the first blanket (11-14) and impression cylinders respectively, and moving the impression cylinder to directly engage the first blanket cylinder.

Abstract: A lightweight, thin walled, plural metal coated plastic sleeve for use in rotogravure or flexographic printing as well as a rotogravure printing cylinder are disclosed. The sleeve is supported internally and laterally by, for example, an expanding mandrel containing journal bearings and the resulting combination may be used as a rotogravure printing cylinder in a rotogravure printing machine. The sleeve and cylinder are lightweight and easy to handle and store and are adapted for quick changes in the printing machine without removal of the journals and the internal support. The particular method of making the sleeve enhances the adhesion of the copper to the plastic base.

Abstract: A method and apparatus for changing printing elements in each of the printing units of a printing press. In one embodiment the device includes a table composed of individual plates with a lifting arrangement for each of the individual plates, and the table, which is positioned underneath the press with two plates for each unit, has means for shifting the table between a first position with one of the plates being disposed under the unit to a second position with the other plate positioned underneath the unit so that a new carriage can be moved underneath the unit as an old carriage is removed.

Abstract: A system for compensating for roll deflection to provide uniform contact pressure across the width of a web disposed between a pair of counter rollers, comprising a first roller mounted for rotation, a second roller mounted for rotation about a deflectable shaft, pressure applying means coupled to the ends of the deflectable shaft for moving the second roller into contact with the first roller, the second roller including an outer shell mounted for rotation relative to the deflectable shaft, a pair of end bearings disposed adjacent the ends of the outer sleeve and a pair of main bearings disposed inwardly from the end bearings a predetermined distance to transmit the applied pressure uniformly over the face width of the second roller when the second roller is used with a flexible first roller, and self-adjusting deflection compensating means arranged proximate to the deflectable shaft for applying pressure to the ends of the outer shell in response to the deflection of the deflectable shaft by the pressure ap

Abstract: The embodiment of a lithography or intaglio printing apparatus described herein include a plate cylinder, an impression cylinder adapted to be periodically pressed against the plate cylinder for rotation therewith at the same speed as that of said plate cylinder, and inking rollers in contact with the surface of a plate. The length of a printing plate mounted on the plate cylinder is less than a half of the peripheral length of the plate cylinder and is also less than the peripheral distance between the contact points of inking rollers with the surface of the printing plate and of the objects to be printed with the surface of the printing plate. The impression cylinder is moved intermittently toward said printing plate to urge sheet material into contact therewith and the periods during which the inking rollers and the sheet material are maintained in contact with the printing plate may be changed independently.

Abstract: In a printing press such as a rotogravure press having cylinder which frequently has to be changed and which is joined up with a driving shaft by way of a clutch, more rational changing of the cylinder is made possible by designing the clutch in the form of a housing, joined with the driving shaft, and of a pin (coaxially fixed to the end of the cylinder) within the housing, that has a collet-like bush within it which takes up the pin and may be caused to undergo contraction and expansion for gripping and freeing the pin within it. To this end there is a stack of frustoconical washers placed on the bush. This stack may be acted upon by a spring unit in an axial direction while the opposite end of the stack is supported. For freeing the stack from the force of the spring unit and so letting expansion of the bush take place, the spring unit may be acted upon by a piston and pushed clear of the stack. On the opposite side of the piston there is a piston working space into which driving fluid may be run.

Abstract: A printing system having an electric circuit supplying an output potential to assist the transfer of ink to a printable substrate is provided wherein the potential is applied to the substrate 12 prior to entry of the substrate into the nip 14 of the printing apparatus.

Abstract: A cylinder for machines processing running lengths of material is supported at its ends by bearing frames which may be moved for moving the cylinder, the cylinder having a pipe-like or tube-like outer casing which is supported by self-aligning bearings and has within it a core which is not turned and has an outer diameter smaller than the inner diameter of the casing, the casing being supported on the core by at least one support bearing which is symmetrical with respect to the middle of the casing and coaxial thereto. To give the casing a desired line of bending, to be in harmony with the cylinder with which it is used (on the other side of the running length of material) without being changed by moving the cylinder towards and away from the other cylinder, the pipe-like casing is supported in self-aligning bearings at its ends, separately from the core within it, on the end bearing frames.

Abstract: A compound printer having print stations, die cutting stations and other operations, such as perforating and punching, has structure for rapid changeover of the individual stations. Movable carriages on carriage bars and indexing mounts allow rapid removal and installation of the elements, such as the print station or the die. Changeover time is substantially reduced. Removed components may be stored on the carriages.

Abstract: A roto-gravure printing base cylinder is made by providing a cylindrical body (1), for example of steel, and applying thereover a cover layer (2) by thermal spraying, for example plasma-spraying, or arc-spraying. The cover layer is made of a material which is inert with respect to electrolytes used in applying a further copper layer over the cover layer to form a finished roto-gravure cylinder for optical engraving, for example an electrochemical valve metal, preferably tantalum, niobium or, most desirably, titanium oxide, forming a matrix in which, before application of the material as a layer on the steel cylinder, electrochemically active materials are applied made of a metal, preferably of the platinum group or other noble metal, and uniformly distributed over the surface, settled on the matrix material.

Abstract: A process for producing novel resinous gravure printing plates comprises coating on a printing substrate such as a cylinder a radiation-curable resin coating composition containing in a specific ratio a soluble polyamide resin and a radiation-polymerizable monomer or the like dissolved in a solvent, curing the coated film by irradiation with actinic rays, and engraving the resulting cured film. As a result, a novel resinous gravure printing plate having excellent engraving property, printing durability, and solvent resistance is produced.

Abstract: A lever at each end of a pressure roll has one arm connecting with means for applying a force thereto and another arm applying a bending moment through rotary bearings to the shell of a pressure roll. In one embodiment, the axle is non-rotating and is forked at the ends and mounted in a sliding carriage on stationary supports there, on which carriage a pressure and cylinder and piston are provided for carrying a force to a lever pivoted on a pin bridging the fork of the axle end to apply the bending moment to the roll shell through a rotary bearing. In another embodiment, the axle is rotary and connected at various places intermediate the roll ends by connection pieces past which bending moments may be transmitted and the lever is tubular and mounted on a stub of the axle by a swing bearing, and the bending moment is transferred to the shell by another swing bearing. Application of force to the lever for bending the roll shell in this case can be done manually with a set screw.