Man Roland Druckmaschinen Ag

Manroland Ag

Manroland Web Systems Gmbh

Eduard Hoffmann

Johann Winterholler

Wolfgang Prem

Georg Schmid

Alfons Grieser

Peter Knauer

Christian Sameit

Ingo Kobler

Paul Steidle

Stefan Albrecht

Thomas Kandlbinder

Klaus T Reichel

Josef Singler

Norbert Dylla

Hans E Mamberer

Herbert Stockl

Angelika Keck

Lorenz Stotz

Katrin Bilzer

A rubber sleeve for a printing press and a method for producing a rubber sleeve is disclosed. The rubber sleeve has a rigid support sleeve and a blanket that is wrapped around the support sleeve as well as is firmly connected to the support sleeve. The blanket has at least a two-layer structure with an inner layer embodied as a base layer and an outer layer serving as a functional layer for the printing process, where the butting edges of the blanket are connected to one another via a sealing material, which is introduced in a gap embodied between the butting edges. The sealing material is introduced in the gap embodied between the butting edges while forming a channel.

Rubber sleeve

A cylinder for an offset printing press comprising a steel core and a heat-conducting layer arranged on the steel core in order to uniformly distribute localized steel core heating. The heat can consist of copper and can be arranged in or underneath a functional layer on the cylinder.

Rolls and cylinders with a steel core for offset presses

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.

Ink transfer device for a printing press

A sleeve, in particular a rubber-blanket sleeve, for a printing press is disclosed. The sleeve having a construction which has at least two layers, having an inner layer which is configured as a carrier layer and an outer layer which is configured as a covering layer and serves for pressure transfer, the sleeve having a hollow-cylindrical design with a cylindrical inner surface and a cylindrical outer surface. The inner layer which is configured as a carrier layer is convexly or concavely curved on the radially outer side, a layer which adjoins the carrier layer having a curvature on a radially inner side which is complementary to the curvature of the radially outer side of the carrier layer.

Apparatus and method for a printing-press cylinder sleeve

A method for influencing lateral web spreading in a printing unit in a rotary printing press, the printing unit having first and second transfer cylinders contacting each other along a contact zone for receiving a web to be printed on therebetween and undergoing a deflection during operation, and at least one plate cylinder which is respectively settable against one of the first and second transfer cylinders for printing on at least one side of the web receivable in the contact zone. The method includes passing the web between the first and second transfer cylinders through the contact zone; and applying a bending moment to at least one of the first and second blanket cylinders counter to a direction of the deflection of the at least one of the first and second blanket cylinders to reduce the deflection, the bending moment being effected by a variable force applied to a cylinder axle of the at least one of the first and second blanket cylinders by a bending apparatus, so that a pressure in a center region of the contact zone along a length of the contact zone is increased thereby increasing the effective radius of at least one rubber blanket clamped onto one of the first and second transfer cylinders from the center region of the contact zone outward so that a concave velocity profile is produced on the web passing through the contact zone between the first and second transfer cylinders, the velocity at the outer sides of the concave velocity profile being greater than the velocity at the center of the velocity profile.

Method for influencing lateral web spreading in a printing unit in a rotary printing press

A printing unit for influencing lateral web spreading in particular in rotary presses, which makes constant contact conditions possible across the width in the rubber-rubber nip and improves the lateral-register quality and the web run without using concave or convex blanket cylinders, has a blanket cylinder and plate cylinders which can be set against the former for printing on one or both sides of a web. The web passes through between the blanket cylinders in a contact zone, it either being possible to skew at least one of the blanket cylinders with respect to the respective plate cylinder or it being possible to skew at least one of the plate cylinders with respect to the respective blanket cylinder, for producing a concave velocity profile on the web.

Method and printing unit for influencing lateral web spreading in particular in rotary presses

A transfer cylinder sleeve is provided for an offset printing machine including an inner carrier layer, a compressible layer and a covering layer, where at least one of the layers has a joint or a gap and provided that when a joint or a gap is used in the covering layer, then the transfer cylinder sleeve is applied to a transfer cylinder in register so that the joint in the covering layer rests opposite a tension channel of a plate cylinder during rolling contact of the transfer cylinder with the plate cylinder. Optionally, a non-stretchable layer is provided between the compressible layer and the covering layer, or alternatively, a non-stretchable material is provided in the compressible layer itself.

Rubber blanket cylinder sleeve for web fed rotary printing machines

A rubber blanket for covering a transfer cylinder of a printing machine is provided. The transfer cylinder includes a cylinder channel for receiving an end of the rubber blanket to secure the rubber blanket to the transfer cylinder. The rubber blanket includes a rigid carrier plate and a plurality of layers that are arranged on the carrier plate. The plurality of layers include a cover layer, a non-expandable layer arranged underneath the cover layer and at least one other layer. A first end portion of the rubber blanket is adapted for insertion into a cylinder channel. The cover layer and the non-expandable layer extend into the first end portion and the at least one other layer does not extend into the first end portion such that when the rubber blanket is secured to a transfer cylinder the cover layer and the non-expandable layer are inserted into the cylinder channel and the at least one other layer is not inserted into the cylinder channel.

Rubber blanket with a metal or plastic carrier plate

A rubber cylinder sleeve has a rubber covering with a layer construction which includes, at a distance from the outer surface, compressible layer elements and layer elements which influence the stiffness (S), such as filaments/yarns or fabric structures. The layer elements which influence the stiffness (S), are incorporated uniformly in the circumferential direction but are prestrained to various degrees in a defined manner in the direction of the sleeve axis, so that a stiffness profile is produced across the sleeve width, which profile is symmetrical with respect to the center of the sleeve width.

Rubber cylinder sleeve for offset presses

An apparatus for producing a sleeve-shaped printing form from a plate-shaped blank includes a circular shaping device for the blank, a welding system, by means of which the plate edges forming the start and end of the printing form can be cut to size, maintaining their dimensions, and welded, and a displaceable device for picking up and for transporting the blank to the circular shaping device. The displaceable device has a fixing frame which has two lifting elements which can be adjusted in accordance with the distance between the plate edges to be joined and can be set along the respective plate edge. The leading plate edge is equipped with a register hole system, a lifting element comprising a pin register interacting with the register hole system while suction elements fix the leading edge, the other lifting element is configured with at least one suction element, the feed table being arranged so as to rise in the direction of the welding system, so that the blank, fixed by means of the pin register, aligns itself in an in-register and level manner, in the direction of its trailing edge, along the obliquely extending feed table on account of its inherent weight.

Apparatus for producing a sleeve-shaped printing form

A rubber cylinder sleeve for an offset printing press includes an inner carrier sleeve that has a circumferential and an axial direction. The carrier is expandable outwardly by an application of compressed air from the interior. The rubber cylinder sleeve also includes a single rubber layer having an inner surface disposed on the inner carrier sleeve and an outer surface for contacting the printing plate. The single rubber layer includes a plurality of compressible elements for increasing the compressibility of the single rubber layer and a plurality of filaments for increasing the stiffness of the single rubber layer. The compressible elements and the filaments are disposed at a distance from the outer surface.

Rubber cylinder sleeve for offset printing presses

A carrying sleeve, for painting and transfer forms of a metal material, the initial form of which is a rectangular thin-walled flat sheet. The sheet is bent into the desired hollow cylindrical form and the edges of the sheet which point toward one another are permanently connected together. The sleeve surface is processed in order to form a homogeneous continuous outer surface, so that continuous printing can be carried out.

Carrying sleeve for printing and transfer forms and a process for production of such a carrying sleeve

Apparatus includes a housing, a feed table outside the housing for receiving a plate-like blank, a round shaping device in the housing for shaping the blank into a sleeve-like printing form, a welding system, and a transport device for fixing, transporting and depositing the blank aligned level on the shaping device. The transport device includes a plate suction frame penetrated by suction elements which make contact with the blank placed on the feed table. After contact has been made, the blank is fixed by activating the suction elements on the plate suction frame so as to be aligned level, and transported in a stable position to the round shaping device. The raw form is deposited on the round shaping device so as to be aligned level and fixed in-register.

Apparatus for producing a sleeve-like printing form

A rubber cylinder sleeve for web-fed rotary offset printing machines has a covering layer which is a finite layer having a joint location, the joint location being filled with a compressible material.

Rubber cylinder sleeve, especially for web-fed rotary offset printing machines

A method for smoothing and compacting a weld on a cylindrical support sleeve includes mounting the support sleeve on an abutment and moving a device across the support sleeve such that a roller on the support sleeve rolls on the weld under pressure so that it smooths and levels the weld. An arrangement for smoothing and compacting a weld on a cylindrical support sleeve includes, the abutment on which the support sleeve may be mounted, the device, and the roller.

Growing community of inventors

Bobingen, Germany

Eduard Hoffmann