Rotary

A mounting-proofing machine to facilitate mounting of flexible printing plates on a plate cylinder preparatory to operation in a flexographic printing press and to obtain proofs from these plates, whereby the mounted plates may be checked for color registration and other factors. The machine includes...     

Preparatory to a printing run, a printed sample, i.e. proof, is produced on a proofing press using the ink and paper substrate contemplated for the printing run so that the printing quality, ink color, and other such aspects can be studied and, if need be, any adjustments made. In the within improved...     

A machine to facilitate the mounting of flexographic printing plates and for obtaining proofs thereof. The machine includes an impression cylinder supported for rotation at a fixed position, the impression cylinder making contact with printing plates on a plate cylinder and rotating concurrently therewith...     

The invention relates to means for printing on labels at a bottle labelling machine. The machine has glue applying means, a stack of labels and a label transfer station arranged about a circle, at least one pick-up element for the labels, a support for said pick-up element, means for rotating said support...     

Rotary printing press is provided with mounting means for an image cylinder to facilitate interchange of cylinders of different sizes and their adjustment. The cylinder is carried on upstanding supports on a cradle, end stub shafts of the cylinder being journalled on said supports and one or both of...     

A constant force spring apparatus is used to bias a transfer roller into contact with a photoreceptor during movement of the latter, so that the force between the transfer roller and the photoreceptor remains constant regardless of any variations in the dimensions of the transfer roller or photoreceptor,...     

A printing press provides a pair of cylinders mounted for rotation about parallel axes. At least one of the cylinders carries a member wrapped thereon having circumferentially spaced edges defining a gutter. When the cylinders are rotated, an impact is generated when the gutter juxtaposes the adjacent...     

A mail canceling device which has at least one canceling die roller pair behind a mail receiving slot therein to cancel the mail as it is inserted into the mailbox. The one or more pairs of rollers can include postmark applying segments as well as canceling dies. The rollers can be provided along opposite...     

A safety device for roll forming apparatus that has a pair of oppositely rotating pressure rollers with parallel axes and peripheral cylindrical surfaces which define between them a gripping and contact gap. The safety device comprises a pair of safety rollers located rearwardly of the pressure rollers...     

The invention relates to a drive device, particularly for offset printing machines, in which a control lever is mounted on a pin fixed in the side wall of the printing machine and is connected by means of an adjustable bar to a swing fork, in which a variable speed gear box is mounted, joined by means...     

A pressure control arrangement for controlling pressure between a printing roller and an offset roller by measuring a force exerted in a bearing of the printing roller when the latter rotates with an angle .psi.. The arrangement includes a piezoelectric pickup positioned on the internal surface of the...     

A rotary sheet printing machine with a plurality of successively arranged printing mechanisms has a drive motor, a rotatable shaft extending between the printing mechanisms, a planetary transmission for each of the printing mechanisms and having a planetary gear carrier, and a worm gear transmission...     

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...     

In a printing press having a plurality of inking mechanisms and plate cylinders with backing cylinders driven by a common central gear, the plate cylinders, inking mechanisms and inking cylinders (if any) are mounted on carriages which can be moved towards and away from the central gear. The shafts of...     

Some conventional printing cylinders include therein a damping system having springs which receive oscillation forces transmitted from the cylinder wall, for example by cross bars, disks, or the like, to dampen oscillations occurring upon roll-off of an axial clamping groove formed in the cylinder against...     

To exert tension on a moving web, typically a paper web pulled over a folding former of a printing machine, the pull-off rollers are formed with axial grooves which are filled with strips of elastic material, such as plastic or rubber; preferably, the width of the ribs, which can be steel, is slightly...     

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...     

To permit release of one bearing (21) from an opening (6) in one side wall (1) of a printing machine, so that a cover sleeve (12) can be applied over the cylinder (3), the cylinder (3) is retained in cantilever manner supported on the other bearing (22) by an auxiliary shaft (10) extending transversely...     

A printing apparatus which is provided with an integral rotary shaft supported on the main unit's frames, a numbering device, a relief imprinting cylinder, and a coating cylinder which are detachably and alternatively mounted on the rotary shaft from its periphery, and an ink unit and a coater unit,...     

A method and apparatus for mounting a die, particularly a rigid cutting die, on a die cylinder includes having a bubble along a seal on the die to bridge any gaps between the die and the die cylinder when the die is initially positioned on the die cylinder. This bubble seal enables a vacuum to be applied...     

An interchangeable drum unit interchange system in an interchangeable drum type rotary printing machine installation proposed to achieve the objects of releasing workers form heavy labor and dangerous work and remarkably shortening the time required for interchange of interchangeable drum units. The...     

A liquid transfer assembly is shown which transfers a predetermined thickness of liquid to a moving surface, the assembly employing a shearing action to achieve the predetermined thickness. The system includes a supply means for providing a source of the liquid; a first arcuately shaped surface which...     

A printing press unit for a printing press system which has a main frame with an impression roller mounted for rotation on a first axis characterized by a sub-frame being mounted for pivotal movement around a second axis and supporting a printing cylinder which will be moved into contact with the web...     

An adjustable bearing arrangement for the cylinder of a rotary printing press provides a fine adjustment in which a step-down in the angle of rotation of the adjusting movement of an eccentric bushing relative to the rotation of a radially slotted cylinder mounting bracket is ensured. The locating pin...     

In a machine such as a printer, mill, and similar machines, the fast coupling system for the replacement of the rollers comprises two vertical slides, each one of the slides being provided at the bottom with a fixed jaw and a movable jaw. The jaws form a circular seat. Each roller has an idle bush which...     

A device which performs the lifting and throw-off of an impression cylinder in a printing machine, comprises a first supporting pin (1) which carries a gate (2) that is provided with a run-out path (4) and stop (3). Upon disengagement of the impressional forces, the stop is in engagement with a first...     

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...     

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...     

This roll mounting assembly (100) for mounting an anilox roll between opposed sideframes (12) includes an anilox roll (120) and opposed end bearings (124). Each sideframe (12) includes an open ended flanged slot (130) receiving an associated bearing (124) at each end and a screw clamping assembly (140)...     

In an assembly device for replacing the block sleeve on the roller core of a printing roller unit a support device with a gripper is provided, which so secures the unit immediately adjacent to one end of the roller core in the vicinity of two adjacent tilting moment support points, that from said single...     

This invention refers to a rotary printing machine with at least one counterpressure cylinder and at least two printing belt cylinders around which a continuous printing belt carrying printing forms and printing pictures is led, with one cylinder thereof being provided with a radial ring of pins in the...     

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,...     

An automatic endorser adapted selectively to apply an endorsement at different locations along the back of a check moving along a path extending between the endorser unit and the platen in a direction generally transverse to the check length. A select lever is adapted to be moved laterally of the check...     

A roller changer of this invention is disposed in a machine the rollers of which must be changed, such as in a rotary press. The roller changer includes manipulators disposed on a movable machine table, for handling rollers to be changed, a roller support unit disposed either integrally with, or separately...     

A plate changing device including a roller disposed parallel to a plate cylinder having a plate lock-up device, fixed positioning device for pressing the roller against the plate cylinder and for inserting a rear edge of a printing plate into the plate lock-up device, and fixed guide means extending...     

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...     

In a rotary printing press with a printing cylinder and a counter roller, such as an impression cylinder, for example, and a print web guided between them, faultless print quality across the entire width is attained, even with an extremely wide print web and a correspondingly slim printing cylinder....     

Drive for a printing press having a plurality of printing units having plate cylinders, elements for transporting stock, and elements which do not transport stock includes a gear-transmission device for interconnecting the printing units, a plurality of motors, respectively, coupled at various locations...     

A web transporting device usable in a rotary printing press or folder, includes a rotatably driven transport roller having a fixed axis and at least one engagable nip roller having an axis substantially parallel to the fixed axis and being engagable with the driven transport roller. The engagable nip...     

A guide roller for a printing press is designed to prevent foreign matters, such as ink or so forth from adhering on the peripheral surface thereof and to sweep up the peripheral surface by a traveling web. The guide roller comprises a roller body having a peripheral surface to contact with a traveling...     

An adjustable nut and a friction washer exert a resistance to the rotation of a form roller, causing the form roller to rotate slower than the plate cylinder. The final form roller thus wipes the plate cylinder free of foreign particles to eliminate hickeys and ghosting on the final print.

An improved printing press includes a tubular-shaped printing blanket removably disposed on a blanket cylinder rotatably supported by a frame and having a continuous outer circumferential surface which is free of gaps. The printing blanket is disposed in rolling engagement with a conventional printing...     

An apparatus for attaching and detaching bearings comprises a stand which is arranged in a position where the bearing for the printing cylinder is attached to and detached from the hole on a frame in a printing press, and which is, also, arranged movably on the side face of the frame of the printing...     

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...     

A printing press (10) is disclosed which incorporates a cooling system for the lubricating oil. The lubricating oil comes into contact with the major heat generating components of the printing press and control of the temperature of the lubricating oil provides an efficient technique for maintaining...     

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...     

An inking and printing system which is usable with fast drying inks uses a housing and a plurality of spray nozzles to apply an ink solvent to the surfaces of printing cylinders after a printing line or contact line. The application of the solvent prevents ink remaining on the printing cylinder, after...     

In a lithographic printing press for printing on material in sheet or web form, a plate cylinder has a printing form mounted thereon. A gapless blanket cylinder is engageable with the plate cylinder and a tubular, removable blanket having a continuous surface is mounted on the blanket cylinder. Mechanisms...     

A cylinder for a rotary press is removably supported between spaced flanges and journals. The cylinder has a body portion that is provided with axially retractable and extendable trunnions. These trunnions can be extended into engagement with the flanges or can be retracted into the cylinder body so...     

A mounting apparatus for a printing cylinder in a printing press is provided. The apparatus includes a tapered bearing housing sleeve 12 adapted for axial insertion into, and retraction out of, a tapered bore 30 formed in a support frame 20 for the printing cylinder. The tapered bearing housing sleeve...     

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,...     

An offset printing press, having a raised horizontal catwalk platform along one longitudinal side, uses a spray powder to help keep them separated within a stack of sheets in a sheet discharge section of the press. Only a portion of the spray powder is used and excess spray powder is present in the air...     

An apparatus for attaching and detaching bearings comprises a stand which is arranged in a position where the bearing for the printing cylinder is attached to and detached from the hole on a frame in a printing press, and which is, also, arranged movably on the side face of the frame of the printing...     

A coupling for a removable cylinder in a rotary printing machine facilitates the removal of the cylinder without disrupting the gear drive wheel for the cylinder. An axially shiftable control shaft is coupled to the cylinder through a switchable coupling. The control shaft drives the cylinder from a...     

An offset rubber-blanket sleeve having a support sleeve in the form of a layered body. The layered body is produced from a plastic, preferably rubber, as a base material and the base material is reinforced by layer inserts embedded therein. Additionally, a rubber layer is vulcanized on the support sleeve.

Printing arrangement, characterized in that it consists in the combination of a frame (2), a printing roller (3) mounted rotatably in the frame (2); an ink roller (4) cooperating with the printing roller (3); and coupling means (5) for making the printing roller (3) cooperate with an external drive.

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...     

A drawing roller pair of a web-fed rotary printing press receives a web that is to be conveyed. The axial spacing distance between the two drawing rollers is adjustable by an adjusting spindle. At least one of the rollers carries a resilient transport element whose effective radius will be reduced if...     

Modules, such a paper tray 21, are stacked under a printer (3). Power to drive the paper feed originates from the printer. A housing (9, 27) carries a shaft (17, 35) which is keyed to turn with the housing. The shafts have abutment surfaces (47a) which mesh with abutment surfaces on the housing (29a,...     

There is provided a plate carrier mechanism A having an endless plate belt 3 hung on between a pair of pulleys 2p and 2q spaced from each other, and a blanket carrier mechanism B having an endless blanket belt 5 hung on between a pair of pulleys 4p and 4q spaced from each other, the blanket carrier mechanism...     

A rotating printing machine comprises several printing stations with each station having a printing form cylinder being driven directly by an asynchronous vectorial electric motor controlled by an electronic circuit for monitoring and control of the angular position at a command value that changes over...     

A printing press has a replaceable cassette removably mounted on a frame. An impression cylinder cooperates with a printing cylinder in the cassette to define a nip through which sheet material moves during printing on the sheet material. The impression cylinder is movable relative to the frame between...     

A speed control device for a multi-motor drive mechanism for driving printing press components is described. The speed control device allows the control of drive motors experiencing different instantaneous loads. This is achieved in accordance with the invention by assigning the motor having the greatest...     

A hollow cylinder retention device includes a hollow cylinder and a pair of bearers disposed at opposite ends of the hollow cylinder. Mounted on each of the bearers is a bushing including an actuator for applying a clamping force to a clamping portion of the bearers to securely clamp the hollow cylinder...     

A complaint drive for use in a printing press. The compliant drive is coupled to a driving gear which can be on the plate cylinder of the printing press. The compliant drive includes an input gear meshing with the driving gear. A compliant coupling is connected between the input gear and a first output...     

An arrangement for controlling a pressure medium of an actuator cylinder on a printing press, wherein the actuator cylinder is provided for moving a protective cover into respective opened and closed positions, includes a control circuit for setting different working-pressure ranges for the actuator...     

A drive is provided for a sheet-fed offset printing press having multiple printing units. Each printing unit has printing cylinders which are independently driven. Transfer drums are driven mechanically uncoupled from the printing cylinders, and may be interconnected by a single gear train, or the transfer...     

In a compact drive for a float-mounted cylinder of a rotary printing machine, the spindle carrying the cylinder is housed together with a motor in a carrier tube mounted in the side wall.

A printing press includes a plurality of cylinders, a main drive system, an auxiliary drive system, and a torsion bar. The plurality of cylinders are arranged in parallel to each other in an axial direction and includes a plate cylinder. The main drive system is constituted by a plurality of drive gears...     

A digital printer of the present invention employs a single laser depress unit. In a prepress process, an impression cylinder is used as a plate retention member for holding four printing plates. Image formation on the four printing plates held on the impression cylinder is achieved by way of the single...     

A diagnostic system for a rotary printing press utilizes signals from angular position detectors on press components to identify wear patterns. These signals are compared to press-idiosyncratic operating patterns and changes between the two are analyzed to provide information on press component wear.

A protective device is provided on printing presses with a two-dimensional protective cover. The cover is mounted pivotably around a pivot axis in a press frame and shields a cylinder pair from access by an operating personnel and grants access to the said cylinder pair after pivoting off from the cylinder...     

A printing system has a print cylinder on which a raised printing surface is formed in situ preferably by a "rapid prototyping" or "fused deposition modelling" machine operating with electronic images from a computer image processing system. After a printing operation has been completed, and it is necessary...     

A drive system for a sheet-fed offset printing press in which one or more cylinders are motor-driven in accordance with a prescribed desired position. According to the invention, a correction device receives measured angular position values of the cylinder from a rotational position sensor. The correction...     

Disclosed is an apparatus to insure the most even linear force possible in the contact zone across the breadth of cylinder bodies of apparatus positioned next to each other. The printing group cylinders are positioned and maintained via the disclosed arrangement in such a way that adjacent cylinder bodies...     

A thin film formation apparatus includes a printing roll having an elastic letterpress of resin or rubber fitted at a part of a surface of a cylinder part and, an intaglio roll rotating while facing the printing roll, thereby transferring ink to a surface of the elastic letterpress through contact with...     

An integral oil pump for an apparatus having a plurality of bearings, the oil pump comprising a housing with an opening for a shaft, a cavity within the housing, a ring gear encircling the shaft with clearance between the shaft and an inner surface of the ring gear, a plurality of evenly spaced keyways...     

An anti-backlash gear assembly includes a drive gear that is fixably mountable on a drive shaft that drives the drive gear and has a plurality of drive gear clearance holes. A rod ring is fixed to one side of the drive gear. A flank gear having a plurality of flank gear clearance holes corresponding...     

A printing press liquid circulation system including a cooling pan having a dedicated power return drain having a power drain orifice and optional cooling capacity located on and as part of the pan. The system induces or suctions flow of liquid from the pan, having a pan supply orifice, to a reservoir...     

A sheet-fed printing machine having an impression cylinder and a movable cylinder that can be thrown onto the impression cylinder and movable into a spaced position far removed from the impression cylinder, includes a sheet guide element assigned to the impression cylinder, the sheet guide element being...     

A container for a printing blanket comprises a cassette of dimensions sufficient at least to contain a printing blanket in wound form. The cassette comprising a casing of generally cylindrical shape having a longitudinal opening for sheet-form egression of a printing blanket from within the cassette....     

A stamp cylinder, upstream number cylinder, downstream number cylinder and a paper discharge cylinder are respectively arranged with respect to an impression cylinder so that a distance between the stamp cylinder and the upstream number cylinder has a length equal to or more than a length of a sheet...     

A printing press comprises a pair of left- and right-frames, a first printing plate guiding device provided at a location near a lower plate cylinder, swingably supported so as to be moved between a guiding position for guiding a new printing plate supplied to a lower plate cylinder or a discharged printing...     

A print unit of an offset printing machine utilizes individually driven cylinders. Each forme cylinder or plate cylinder is driven by its own, separate drive motor. The blanket cylinders, or cooperating blanket cylinders and counter-pressure cylinders are driven together by associated drive motors.

According to the stencil printing machine of the present invention, the printing drum unit is moved from a side direction to the pulled-out first support rail so that the one support rod is supported. That is, unnecessary becomes the operation of holding up the printing drum unit once upwards and then...     

A lithographic newspaper printing press comprises printing units (4.1 to 4.5) which are mounted on top of each other, forming a tower arrangement (2). Each printing unit comprises a first and a second plate cylinder (24a, 24b) having a length being substantially four times the width of a newspaper page...     

A printer capable of printing a multicolor image with a single pass of a paper or similar recording medium includes a plurality of print drums. Drum drive gears each are mounted on a particular print drum such that the print drum is replaceable. The print drums are interlocked to each other by rotatable...     

A printing press includes an L-shaped support arm swingably supported by a main frame such that a distal end thereof can move between lower and upper positions, a support frame swingably supported at the distal end of the support arm such that the other end thereof can move between upper and lower positions,...     

A printing cylinder for offset printing includes a cylinder member of a hollow cylinder having a covering portion which forms a substantially uniform, smooth outer circumferential surface having no spliced portion in the circumferential direction, the covering portion being capable of transferring printing...     

A friction roller is connected, in an articulated manner, in the area of its axis of rotation, to one end of a connecting rod. The second end of this connecting rod is connected, in an articulating manner, to a peripheral portion of a rotatable lever that can be driven. A rotational axis of the lever...     

A flexographic preview printer for duplicating conditions of a contemplated press run. The preview printer includes an inking unit and a printing unit. The inking unit has an ink roller and an anilox roller with a doctor blade for precision metering of the ink on the anilox roller. The printing unit...     

A printing press comprises a pair of left- and right-frames, a safety cover movably supported between a closing position for closing at least one part of a space formed between the frames and a releasing position for releasing the space and a printing plate holding device movably supported at an exterior...     

A printing unit is provided for a web fed printing machine having at least two cylinders where at least one of the cylinders is adjustable with respect to another of the cylinders; a machine frame having at least one load bearing wall arranged laterally beside an end of the cylinders; a drive motor corresponding...     

A web-fed rotary printing press includes at least two printing units each of which has two print units. The two print units are situated adjacent each other and form a double print unit or print unit module. Several double print units or printing units can be situated one after the other. One of the...     

A printing press has a support arm that can move between lower and upper positions, first and second link plates swingably supported by a main frame and the support arm, respectively. A connection pin having a protruding end portion is provided to connect the link plates. A support lever, swingably supported...     

A cylinder drive for a rotary printing press uses bearing rings that are in contact with each other. A friction torque that is produced during the printing process, as a material passes between the cylinder which carry the bearing rings, is approximately compensated by an additional friction torque caused...     

An inking apparatus for a printing press comprises upper and lower fountain rollers disposed and rotatably supported in respective ink fountain apparatuses; upper and lower ductor rollers supported to be rotatable in close proximity with the fountain rollers; and an ink mixing roller which is the furthest...     

A printing-plate changer assembly for making-ready and feeding printing plates to a plate cylinder of a printing unit, the assembly including a printing-plate changer located upline of the printing unit, in a position for feeding the printing plates, and being articulatedly connected to the printing...     

A printing cylinder with a cylinder core (10), on which a carbon fiber-containing casing (20) is disposed, wherein the casing (20) is self-supporting and held at a distance from the peripheral surface (18) of the cylinder core (10) by disks (22) disposed at the two ends.

A mounting system is disclosed for removably mounting rollers and cylinders in a machine for quick and easy removal and replacement by other rollers and cylinders. The mounting system provides for rapid separation of the journal from the roller or cylinder so that only the roller or cylinder is removed,...