Heidelberger Druckmaschinen Ag

Heidelberger Druckmaschinen

Hans-Georg Jahn

Hermann Beisel

Nikolaus Spiegel

Peter T Blaser

Helmut F Jager

Anton Rodi

Dieter Hauck

Rudolf Hutzenlaub

Robert Muller

Willi Jeschke

Wolfgang Pfizenmaier

Karl-Heinz Seefried

Josef Wehle

Walter Hofheinz

Andreas Geider

Karl-Heinz Walther

Klaus Durrnagel

Robert Mu/ Ller

Helmut Ja/ Ger

Julius Staffer

Printing-plate magazine for printing machine

Device for supplying printing plates to a printing machine

Process and device for carrying away printing plates from a printing

A magazine assembly for automatically changing printing plates, includes a magazine for receiving a cassette therein, a cassette receivable in the magazine and having structure for receiving a plurality of printing plates therein, and a device for removing the printing plates upon demand for feeding the printing plates to a printing cylinder of a printing unit.

Magazine assembly for automatically changing printing plates

A device for movably positioning in a plurality of positions a magazine for automatically changing printing plates in a printing machine for changing the printing plate of the plate cylinder, replacing the printing plates of the magazine, servicing the printing machine and normal operation, includes a device for mounting the magazine, including a vertical guide wherein the magazine is displaceable, and a horizontal shaft about which the magazine is swivelable, and drive devices for displacing and swiveling the magazine.

Device for positioning a magazine for automatically changing printing

An apparatus for stretching a cylinder blanket on a sheet transfer cylinder of a sheet-fed printing press includes a tiltable member mounted on the cylinder. A first end of the blanket is first attached to the cylinder in a cylinder groove, the blanket is wrapped around the cylinder, and the second end of the blanket is attached to the tiltable member, while the tiltable member is in an open position. The tiltable member is then closed to stretch the blanket about the cylinder, and locked into the closed position to maintain the blanket about the cylinder.

Apparatus for stretching a cylinder blanket on a sheet transfer cylinder

In a rotary printing machine, there is provided a device for bringing a lacquering/inking cylinder into and out of engagement with at least one of a pair of cylinders including an impression cylinder, the lacquering/inking cylinder being mounted on a shaft, which includes a substantially circular ring turnably disposed on the shaft of the lacquering/inking cylinder, the ring being spring-biased towards two bracing stops and being formed with an indentation at a section of the circumference thereof, the ring being turnable on the shaft so as to move the indented section of the circumference thereof into a position opposite one of the bracing stops for bringing the lacquering/inking cylinder out of engagement with the impression cylinder, the ring being spring-biased in a direction towards the other of the pair of cylinders, the other of the bracing stops being disposed in an open angle formed by an intersection of a line connecting respective axes of the lacquering/inking cylinder and the impression cylinder and a line extending substantially from the axis of the lacquering/inking cylinder to the axes of the other pair of cylinders, and being displaceable by remote control.

Rotary printing machine with device for engaging a

In a rotary printing press, there is provided a device for bringing a rubber-covered cylinder into and out of engagement with at least one of a pair of cylinders consisting of an impression cylinder and a plate cylinder, the rubber-covered cylinder being mounted on a shaft, which includes a substantially circular ring turnably disposed on the shaft of the rubber-covered cylinder, the ring being spring biased in a direction towards a middle location between two circumferentially rounded bracing stops and being formed with an indentation at a section of the circumference thereof, the ring being turnable on the shaft so as to move the indented section of the circumference thereof into a position opposite one of the bracing stops for bringing the rubber-covered cylinder out of engagement with the impression cylinder, the indented section being formed as an insert channel for accommodating therein the circumferentially rounded one bracing stop, the other of the pair of bracing stops being in continual engagement with the circular circumference of the ring and being displaceable by remote control for disengaging the rubber-covered cylinder from the plate cylinder without turning the ring, the other biasing stop also forming a support location for introducing the circumferentially rounded one bracing stop into the insert channel in an operating phase wherein the rubber-covered cylinder is disengaged from the impression cylinder, as well as in an operating phase wherein the rubber-covered cylinder is disengaged from both the impression cylinder and the plate cylinder.

Rotary printing press with device for engaging or disengaging a

Washing device for cleaning a cylinder of a printing machine includes a brush roller formed with bristles and rotatably driven about an axis, the brush roller cooperatively engaging the cylinder, a device for feeding washing fluid to the bristles for self-cleaning the bristles, and a deflection element disposed in a rotational region of the bristles, fixed in position relative to the brush roller and extending along the length of the brush roller, the bristles yieldingly brushing against the deflection element as the brush roller is rotated so as to be bent temporarily and subsequently returned to a straight extended position thereof, the deflection element being formed as a distributor pipe connected to the feeding devices and having outlet openings formed therein for directing the washing fluid radially towards the axis of the brush roller.

Washing device for cleaning a cylinder of a printing machine

A combination of counter-rotating cylinders having a nip therebetween, and a device including a finger protecting element pivotally mounted at an end thereof on a shaft extending parallel to axes of the cylinders and disposed adjacent the cylindrical surfaces of the cylinders in a danger zone in front of the nip, the finger protecting element having a guide surface on a side thereof facing towards one of the cylinders, the guide surface beginning at the other and free end of the finger protecting element in vicinity of the nip.

Finger protecting element for cylinder nip

The invention relates to a sheet-fed rotary printing press for multi-color printing with an in-line arrangement of the printing units. Each printing unit comprises a plate cylinder, a blanket cylinder and an impression cylinder, all of a single diameter, as well as three sheet-transfer drums. The sheet-transfer drums of single diameter are provided for printing jobs using a one-sided multi-color printing process. On the other hand, the design for recto-and-verso printing is provided with a storage drum and a turning drum, with the storage drum being of double diameter. Depending on the job structure, the printing press according to the invention can later be converted at the printing shop from one design to the other.

Sheet-fed rotary printing press for multi-color printing

In a sheet rotary printing press having printing units followed by a delivery, a lacquering device located downstream of the printing units and upstream of the delivery and including a lacquer application cylinder for transferring lacquer onto a printed sheet lying on an impression cylinder, a metering roller operatively associated with the lacquer application cylinder, and a dipping roller operatively associated with the metering roller and immersed in a supply of lacquer received in a tank, the metering roller transferring a defined layer of lacquer to the lacquer applicator cylinder and having a diameter comparable to the diameter of the lacquer applicator cylinder in accordance with a ratio of 0.6:1 to 1:1.

Laquering device in rotary printing presses

To make more compact the structure of a sheet-fed rotary printing press and to simplify the installation of the individual printing units, there is provided a separate frame for each printing unit in which the plate cylinder and blanket cylinder are mounted together with the inking and wetting unit. The impression cylinder and the transfer drum are mounted as a transport unit in a fixed base frame. The frames of the printing unit are mounted on the base frame of the transport unit in the longitudinal direction of the press, so that it is possible to create an open space between any two printing units as required by the operator.

Sheet-fed rotary printing presses for multi-color printing

A washing device for washing a rubber blanket cylinder in a rotary offset printing machine, the washing device being convertible to a device for applying lacquer to the rubber blanket, the washing device being disposed at the blanket cylinder upstream of a location of contact between the blanket cylinder and a printing-image carrier, as viewed in direction of rotation of the blanket cylinder, the washing device having a metering roller, a spray device located adjacent to the metering roller, and a washing roller engageable with the metering roller and being disposed in a collecting vessel, including a washing-liquid supply container and a water supply container and valve means for alternatively feeding washing liquid and water from the respective container to the spray device, the metering roller of the washing device, when the washing device is converted to the lacquer applying device, serving as a lacquer metering roller and being engageable with the blanket cylinder in one printing unit of the rotary offset printing machine which does not participate in the printing operation, and the collecting vessel being replaced by a lacquer trough.

Washing device for washing a rubber blanket in a rotary offset printing

In a printing machine, a medium applicator disposed downstream of printing units of the machine, in travel direction of a sheet which has been printed, the applicator having three rollers including a first roller for taking up medium from a supply container, a second roller for metering a quantity of the medium to be applied, and a third roller having the same diameter as that of cylinders of the printing units for transferring the medium, includes a rubber lining disposed on the third roller for directly applying the medium onto the printed sheet; the three rollers, during application of the medium, being in constant meshing engagement with a sheet-transferring cylinder; a device for uncoupling the three rollers from the sheet-transferring cylinder, and a separate motor for driving the three rollers when the rollers are uncoupled.

Growing community of inventors

Wiesenbach, Germany

Hans-Georg Jahn