Man Roland Druckmaschinen Ag

Man Roland Druckmaschinen

Manroland Ag

Manroland Sheetfed Gmbh

Robert Ortner

Peter Hummel

Achim Stoffler

Harald Wolski

Bernd Ullrich

Valentin Gensheimer

Marc Hinz

Jens Gebel

Joachim Herzel

Uwe Basel

Ingo Kobler

Claus D Simeth

Paul Abendroth

Helmut Schild

Josef Mathes

Janko Despot

Peter Schramm

Erich Pietsch

Jürgen Schölzig

Rudolf Mitze

Hubert Zschetzsche

Rudolf Raab

Joachim Steuer

Franz-Peter Richter

Wolfgang Rozek

Karl-Peter Klein

Harwin Laumann

Reinhard Ruckert

An inking system for a printing machine which has a relatively simple design and which is adapted for more stable ink transfer to a plate cylinder. The inking system includes an ink supply roller (), one or more drivable inking unit rollers (), an adjustment system for establishing a predetermined nip () between the ink supply roller and one of the drivable unit inking rollers (), and at least one movable calender roller () in constant contact with one of the drivable inking unit rollers operable for selectively interrupting the ink transfer.

Inking system for a printing machine

An ink metering system for a roller train in a printing machine which in the illustrated embodiment includes a fountain roller and a downstream train of rollers communicating with a plate or form cylinder of the printing press. One or more plating devices ( ) are provided which each have a plate-like element ( ) adjustably positionable with respect to a respective roller for leveling ink on the surface of the roller before or after passage through a contact zone with an adjacent roller in which ink is pulled off and separated between the rollers. The plating devices are relatively simple in construction and operation and provide stable ink guidance on the roller surfaces that noticeably improves print quality.

Dosing system for inking up rollers in a printing machine

On stack changing, in a sheet feeder, a remaining-stack carrying device ( ) is used, of which the remaining-stack bars ( A, B) can be pulled in a staggered manner. For better access, a U-shaped mounting ( ) is provided, in which the pull drives ( ) of the remaining-stack bars ( ) are displaceably mounted.

Stack changing device

A remaining-stack carrying device ( ) in a sheet feeder ( ) is used in non-stop stack changing. The remaining-stack carrying device ( ) is integrated into the stack feeder ( ) to simplify retrofitting. A remaining-stack lifting gear ( ) uses the lifting elements present in each sheet feeder ( ) for lifting and lowering during stack exchange.

In a stack changing device, on a sheet feeder the remaining stack bars ( A, B) are pulled from the stack area, out-of-line in relation to each other. For improved stack joining, the inner remaining stack bars ( A, B) are each pulled more slowly than the outer remaining stack bars ( A, B).

In a device for changing a sheet stack in a sheet feeder, remaining-stack bars ( A, B) of different thicknesses are used to improve operation. Upon combination of a remaining-stack (H) with a H. sheet-stack (S), they are placed in graduations on a pallet (P) and successively pulled from the stack area.

In a non-stop stack changing device, remaining-stack bars are pulled from the stack area one by one and out-of-line in relation to each other. To this end, a pull/push drive is provided, which makes it possible to push the remaining-stack bars simultaneously into the grooves of a pallet carrying a sheet stack. Furthermore, the pull/push drive makes it possible to pull the remaining-stack bars in pairs from inside outwards out of the stack area. In addition, the remaining-stack bars can be pulled in a first and second sequence in accordance with this model. An individual motor drive is provided for this purpose, which operates interlockingly on each individual remaining-stack bar.

A sheet stack changing device for a sheet processing machine having a main stack lifting mechanism and a remaining-stack carrying device. The remaining-stack carrying device has bars for temporarily holding a remaining stack, a drive mechanism for moving the bars forward into the stack and retracting the bars from the stack in a staggered relation to one another. The remaining-stack carrying device is raised by a lifting mechanism. A pulling mechanism connects the bars with a carrying rail slidably engaged on the remaining-stack carrying device so that the carrying rail slides forward with the bars and retracts independently from the bars.

An offset printing device is provided for a rotary printing machine having a plate cylinder carrying a dry flatbed printing plate, the printing device having an improved inking unit which reduces the occurrence and effect of contaminants. In the inking unit, at least one ink application roller, which is frictionally engaged against the plate cylinder during printing, is drivable by at least one positively driven inking roller at a peripheral speed which is different from the peripheral speed of the plate cylinder. In an embodiment, a plurality of ink application rollers contact the plate cylinder and are respectively driven at successively differing peripheral speeds.

Offset printing device for a rotary printing machine

An offset printing machine having a plate cylinder which carries a printing form and which is operatively connected to an inking unit and a dampening unit is provided. The dampening unit includes a dampening applicator roller which is mounted in contacting relation with the dampening applicator roller. The dampening applicator roller also includes at least one auxiliary roller which is mounted in contacting relation with the dampening applicator roller downstream or after the contact point between the dampening applicator roller and the plate cylinder. The auxiliary roller has a surface with a coating of non-stick material which blocks the transfer of ink and dampening medium to the surface of the auxiliary roller and is axially movable relative to the dampening applicator roller and selectively rotatable at circumferential speeds substantially equal to or different from the circumferential speed of the dampening applicator roller.

Dampening unit for an offset printing machine

An apparatus and method is disclosed for the automatically controlled the washing of a part of a printing unit of an offset printing machine as a function of the ink consumed by the unit. The control of at least one washing device, which is assigned to one of the parts of the printing unit, is performed, in particular with respect to the washing frequency, as a function of characteristic values which are derived from functions of the printing unit and/or are generated for controlling these functions. In order to optimize the frequency of the washing operation and/or the type of washing operation, the ink consumption of the printing unit occurring during machine running is determined in accordance with at least one characteristic value of the ink metering, the frequency and/or type of washing operation is then determined from the amount of ink consumption.

Method and arrangement for cleaning a part of a printing unit of an

An offset printing system includes an improved inking unit for applying ink to a rotatable plate cylinder, wherein the inking unit appreciably reduces the production of contaminants. In particular, the inking unit one or more ink application rollers that adjacently contact the plate cylinder. A series of rollers are in ink communication with these application rollers, including at least one inking roller in direct contact with the ink application rollers, and at least one inking roller in indirect inking communication with the ink application rollers. The inking rollers are driven in a positively locking manner and which are drivable at a peripheral speed that differs from the peripheral speed of the plate cylinder, and the inking roller furthest from the plate cylinder is driven with the greatest peripheral speed differential relative to the plate cylinder. This peripheral speed differential between rollers results in a relative slippage and wiping effect which advantageously reduces the effect of contaminants.

Offset printing device for a rotary mchine printing machines

In order to improve the sheet removal at the delivery station of a printing press, a blowing device is provided adjacent a side of a delivery stack of printed sheets. The blowing device includes one or more blowing tubes pneumatically coupled to a sheet hold-up device and two front lays of the printing press at the delivery station. When the sheet hold-up devices are extended into the region of the delivery stack and the front lays are swung to a lowered position, the blowing tubes direct a stream of pressurized air into the region of the front edge of the delivery stack. This pressurized air stream, in turn, produces air cushions above and below the sample sheet which to be drawn out, these air cushions separating the sample sheet from the adjacent printed sheets and permitting air free removal even in the case of large printed formats.

Apparatus and method for sample sheet removal from the delivery station

An undershot inking unit for a printing machine and a method for regulating ink distribution in a printing machine are disclosed. The undershot inking unit comprises an ink fountain roller communicating with an ink fountain, an inking roller, and an intermittent ductor roller for transferring ink from the ink fountain roller to the inking roller. In accordance with the present invention, the ductor roller is thrown onto the ink fountain roller at a rate that is independent of the printing speed of the printing machine, preferably, at a rate that is constant for all printing speeds. The disclosed apparatus and method alleviate the problem of ink fall-off in printing machines.

Apparatus and method for regulating ink distribution in a printing

A process and apparatus for automatically changing the stack of sheets in a sheet-fed printing machine is disclosed comprising sheet-carrying surfaces, sheet-separating devices, a pallet, sensors and a control system. The sheet-carrying surfaces act in concert with the sheet-separating devices to create an auxiliary stack separate from the existing stack of printed sheets. In this manner, the existing stack of sheets are removed and the auxiliary stack is deposited on a new stack base as brief and as closely coordinated as possible. The timing of the transition from the sheet-separating devices to the sheet-carrying surfaces is coordinated such that, even in the case of thin printing materials, the stack changing apparatus functions properly during the stack-changing process.

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Alzenau, Germany

Robert Ortner