Man Roland Druckmaschinen Ag

Josef Gottling

Horst Dauer

Bernhard Feller

Hartmut Fuhrmann

Barbara Nussel

Godber Petersen

Hans Fleischmann

Josef Schneider

Xaver Bachmeir

Martin Endisch

Wolfram Fischer

Arnim Franz-Burgholz

A printing plate which can be repeatedly directly provided with an image and erased and is suitable for a wet offset printing method. The printing plate has a smooth and pore-free surface which is hydrophilic or can be hydrophilized after being provided with an image. The printing plate contains no strong microdipoles and consists of a ceramic, a glass or a metal, in particular of a metal alloy. An erasing and hydrophilizing apparatus preferably integrated in the printing press, repeatedly erases and prepares, i.e. rehydrophilizes, the printing plate for a further image-providing and printing process.

Erasable printing plate having a smooth pore free ceramic or glass

A process for a web-fed rotary printing machine and, in particular, a process for pre-inking an inking mechanism. The inking mechanism is cleaned when all other rotating parts of the printing machine are standing still, even with an inserted printing web. Ink residues are removed from the inking mechanism by a washing device, until a defined starting state is reached. The inking mechanism is then newly inked in accordance with subject-specific instructions, i.e., in accordance with a print job to be printed. The inking is performed in parallel fashion during the start-up of the printing machine. Ink application rollers are positioned on a form cylinder when the form cylinder attains a predetermined rotational velocity.

Process for attaining a production-run state in a web-feD rotary

Erasable printing plate and a process and apparatus for erasing and

A method and an apparatus for repeatedly erasing the ink-carrying layer of a printing form which is covered by an image and is suitable for offset printing. An erasing device directs a jet of pressurized medium at an angle of less than 90.degree. against the surface of the printing form on which the image is applied. A relative movement is carried out between the printing form and the erasing device, so that the image elements of the ink-carrying layer are removed over the entire surface of the printing form. The pressurized medium is preferably water.

Method and apparatus for erasing the ink-carrying layer from the surface

A rotary printing machine in which cylinders are uncovered by a swinging door or a removable flap. Journals are separated from the cylinder bodies and remain, together with bearings arranged in the door or the flap. At a separation point the journals have truncated conical projections which are inserted into corresponding truncated conical depressions in the end face of the cylinder body.

Rotary printing machine with cylinders having an uncoverable end face

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 have an approximately parallel orientation.

Float-mounted printing-group cylinder

A printing machine, having side walls and at least one form cylinder with an outer cylindrical surface carrying a removable sleeve-shaped printing form, the form cylinder having journals and being removably mounted in the side walls. A bearing rotatably supports the journals in the sidewalls and at least one of the side walls has an opening. A transport device moves the form cylinder back and forth through the opening in the side wall so that the sleeve of the form cylinder removed from the printing machine can be exchanged for a replacement sleeve and the form cylinder with the replacement sleeve can be moved back into the printing machine.

Printing machine with at least one interchangeable cylinder

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.

Driven cylinder

Erasable printing plate having a smooth pore free metallic surface

In order to permit a printing form to be produced by laser-induced thermotransfer in a simple manner that can be integrated into the printing machine, without the gases which arise during laser imaging detectably disturbing the transfer of material from the transfer foil, i.e., the image quality, a strip-type transfer foil with a strip width that is small relative to the printing form width is used. During imaging, this transfer foil is conveyed continually between the printing form and the laser beam, close to the printing form surface, and is thereby moved simultaneously and synchronously with the movement of the laser beam across the printing form width.

Process and device for producing a printing form with a narrow transfer

The printing apparatus with a forme cylinder which has in its interior a first roller for winding off a printing foil which can be pulled onto the outer surface of the forme cylinder, and a second roller for winding up the printing foil which has been pulled onto the outer surface of the forme cylinder. The forme cylinder has in its outer surface a single opening for a recess into the interior of the forme cylinder. The first roller and the second roller are together arranged in the recess. The printing foil can be wound from the first roller onto the outer surface of the forme cylinder and from the outer surface onto the second roller.

Growing community of inventors

Friedberg, Germany

Josef Gottling