Man Roland Druckmaschinen Ag

Wolfgang Prem

Eduard Hoffmann

Johann Winterholler

Ingo Kobler

Hans E Mamberer

Xaver Bachmeir

Alfons Grieser

Herbert Stockl

Eduard Hoffman

Anton Stadlmair

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

A printing roller for channel-free printing, in particular for a rotary offset printing machine including a roller core 1 on which a sleeve-shaped printing or transfer form 2 can be positioned. The roller includes a thin intermediate layer 7 provided at least partially between the outer surface of the roller core 1 and the inner surface of the sleeve-shaped printing or transfer form 2 for adjusting the printing or transfer form 2 on the printing roller 1, 3, 4, 6 and for securing the printing or transfer form 2 in an improved manner. The printing roller constructed according to the present invention allows a sleeve-shaped printing or transfer form to be adjusted or fitted precisely and in a stationary manner on the printing roller when slid onto the printing roller without limiting the principle on which the sleeve technique for printing is based.

Printing roller for channel-free printing

A device for manipulating sleeves, including sleeves serving as printing forms or as rubber blankets as well as screened sleeves, from outside the printing mechanism without removing the paper web which has been drawn in. The device includes a sleeve gripping system associated with each cylinder intended to receive a sleeve. A force mechanism is activated by this sleeve gripping system to grip the sleeve within the printing mechanism in a frictional or positive engagement. When gripped, the respective sleeve can be displaced on the cylinder in the axial direction in a correctly positioned manner by the gripping system at least between the side walls of the printing mechanism.

Device for manipulating sleeves on cylinders

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.

Offset rubber-blanket sleeve

A device for producing a tube-shaped printing form from a plate with a register hole system. A clamping strip which can be supported in its initial position and fastened to the respective plate edge longitudinally is provided for each edge of the plate to be connected. The clamping strips have a pin register which is designed in so that the pins can cooperate with the register hole system of the plate. A mechanism is assigned to one of the strips for effecting a rotation around an axle parallel to its longitudinal axis. The strips can be positioned opposite one another by this rotation and the plate edges clamped at the strips contact one another and can be connected for the purpose of forming a tube.

Device for producing a tube, in particular a tube-shaped printing form,

A plate cylinder for a sleeve-type printform, particularly an aluminum offset printform, with a ramp-like transition piece as a guide surface for the mechanical expansion of the sleeve-type printform onto the larger cylinder diameter. At least the surface area of the plate cylinder that is covered by the ramp-like transition piece has a highly wear-resistant and pressure-resistant slide surface of a material different from the remaining surface material of the plate cylinder to prevent abrasion when the printform is slipped onto the plate cylinder.

Plate cylinder for a sleeve-type printform

A sleeve-shaped printing sleeve for a form cylinder of a printing machine is fabricated from a blank of metallic material by cutting the blank to a width corresponding to the form cylinder and to an intermediate length which exceeds the circumference of the intended printing form cylinder. Additionally, the blank is provided with aligning indicia in the regions between each edge of the intermediate-length blank and the corresponding edge to be defined by cutting. Thus, these regions lie outside of the printing area. The blank is bent circularly, held in exact register in a bending/welding device, and cut to the length required for the intended form cylinder by laser beam cutters. As a result of this cutting operation, two waste pieces are produced. The waste pieces are removed and the now defined plate edges forming the beginning and end of the printing form are positioned opposite one another without overlap and welded together, preferably by a laser.

Process for fabricating a sleeve shaped printing form

A circumferentially continuous printing plate, which has the advantage over clamp plates that a clamping arrangement and groove in a plate cylinder can be eliminated, is formed by rolling a flat printing plate into tubular or sleeve form and welding the end edges together, preferably by a neodymium-YAG laser weld, resulting in a narrow, less than 1 mm wide, weld seam (2) having upper and lower concave sides, or by adhering the end edges to an underlay saddle (9), the plate can be coated and imaged when flat or after having been rolled and installed on a plate cylinder (37) of a printing machine. Interengaging projection-and-recess elements (4, 6; 14, 16) are formed on the plate (1, 1') and on the cylinder (37), respectively, to ensure lateral and circumferential register.

Welded tubular printing plate, and the method of making

An offset blanket for a grooveless blanket cylinder for applying a printed image onto web material or sheet material is composed of a carrier plate which has been cut to size and a rubber layer placed on the carrier plate. The beginning and the end of the carrier plate of the rubber layer are connected to each other so that the outer circumferential surface of the blanket is continuous and without gaps. The blanket surrounds the blanket cylinder in the operating position in the form of a sleeve in a frictionally engaging manner but releasably. A register device is provided on at least one end face of the blanket for securely positioning the blanket on the blanket cylinder.

Offset blanket for a grooveless blanket cylinder composed of a carrier

To securely attach a printing cylinder sleeve (3, 16, 28, 38, 38') over a cylinder core structure (2, 15, 27, 37), the core structure has grooves (4, 23, 29) located in the vicinity of axially remote end regions, which grooves are closed off by expansion rings (12, 25, 35, 38, 38'), which can be expanded by applying a hydraulic or pneumatic pressure medium, such as grease, or compressed air, between the core structure and the expansion ring. Connecting ducts, filled with grease, or connectable to a source of air pressure, are formed in the cylinder, connecting with the grooves therein.

Sleeved printing machine roller or cylinder for an offset printing

To provide a pre-bending stress on a shaft (1) supporting a plurality of bearings (2, 3) which, in turn, support a roller sleeve (4), the shaft is fitted at the end portions thereof into a sleeve (5) formed with radial projections (6, 7). The sleeve is pivotably retained in a support holder (8, 9) having projecting jaws (8), fitting around the projections (6, 7) of the sleeve. Coupling pins or bolts (13) pivotably or tiltably interconnect the sleeve and the jaws. To provide a pre-stressing tilt against the ends of the shaft, engagement or adjustment screws (18, 19) can lock the projections (6, 7) extending from the coupling sleeve (5) in predetermined pivoted or tilted position with respect to the side walls (11) of the machine, to which the support holder (9) is secured. Preferably, a part-spherical interposed coupling is located between a head and counter nut of the adjustment bolts.

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Ustersbach, Germany

Wolfgang Prem