Koenig Bauer-albert Aktiengesellschaft

Helmut Puschnerat

Peter Schroder

Wolfgang Gunter Ruckmann

Peter Krokolinski

Gunter Schmitt

In a printing unit of an offset rotary printing press with two pairs of plate and rubber blanket cylinders, the first plate cylinder and the two rubber blanket cylinders are mechanically coupled and are driven by a common drive. The second plate cylinder is provided with its own drive.

Printing unit having drive means

Rubber blanket for a printing machine

A flexible plate is removed from the surface of a cylinder in a rotary printing press by supplying a fluid under pressure to a chamber into which the plate ends have been inserted. The fluid under pressure creates a positive pressure in the chamber which is sufficient to push at least one of the plate ends out of the chamber.

Plate end ejector for plate cylinder

A wide printed paper web is longitudinally separated into at least two partial paper webs after the last printing unit of a printing press and before being dried. The plural partial paper webs are dried in a drying device on separate or the same level. The partial paper webs are dried in a smudge-free manner and are free of longitudinal creases or folds.

Method and apparatus for feeding and drying a printed paper web

Arrangement for retaining a curved support

A rubber blanket unit is structured having an underlying support plate with angled end legs, and an overlying rubber blanket with leading and trailing ends. The rubber blanket unit is secured to a blanket cylinder by insertion of the end legs into a thin cylinder slit. The rubber blanket ends are formed each having a reduced thickness and each further having a closure element. The leading and trailing blanket end closures cooperate to form an essentially seamless rubber blanket when the blanket unit is in place. The blanket ends are not dislodged by mechanical or chemical cleaning.

Rubber blanket for a rubber blanket cylinder

A device for fastening a rubber blanket unit to a blanket cylinder utilizes a rubber blanket secured to the surface of a support plate which is provided with beveled ends. These ends are insertable into a narrow slit in the cylinder and are held in the slit by pressure elements. The beveled support plate end lateral surfaces are in contact with each other.

Device for fastening a rubber blanket unit to a blanket cylinder

A device for fastening a rubber blanket unit to a blanket cylinder utilizes a rubber blanket secured to the surface of a support plate which is provided with beveled ends. These ends are insertable into a narrow slit in the cylinder and are held in the slit by pressure elements. A plurality of resilient ejectors are supported in this cylinder slit and have free ends which support a filler strip. The filler strip closes the gap between the blanket ends when the rubber blanket is attached to the blanket cylinder.

Rubber blanket unit fastening device

A plate end of a flexible printing plate is clamped or retained in a narrow slit in the surface of a plate cylinder. A rotatable spindle is situated adjacent a radial inner end of the cylinder slit. This spindle carries a group of pressure elements having pressure cams that are engageable with the plate ends during rotation of the spindle and which secure or clamp the plate ends in the narrow cylinder slit.

Device for clamping plates on a cylinder

A rubber blanket cylinder for offset printing utilizes a cylinder body that has magnetic strips to retain a rubber blanket packing comprised of a rubber blanket and a ferromagnetic rubber blanket support. A fastening strip is positioned on the circumference of the cylinder body and extends axially along the cylinder. The rubber blanket packing is prevented from wandering or shifting by the fastening strip. A free end of the fastening strip is covered by the rubber blanket which is thus fastened on the cylinder body in an essentially gap-free manner.

Rubber blanket cylinder for offset printing

A damping unit for a printing press utilizes four rollers to provide damping medium from a source of the damping medium, to a printing plate cylinder. The various rollers in the damping unit are interrelated by appropriate diameter and circumferential speeds to effectively prevent the migration of printing ink back from the printing cylinder to the damping fluid source.

Damping unit for a printing press

A plate clamping device which is usable to secure at least one end of a flexible plate to a cylinder utilizes a group of spring fingers that are shiftable radially in an axially extending slit in the cylinder to engage apertures in the end of the plate. The spring fingers have barbs that are receivable in these plate end apertures. The spring fingers are shiftable radially in the cylinder slit by rotation of a spindle situated in the cylinder.

Cylinder with plate clamping device

A chamber doctor blade arrangement for a short inking unit utilizes an ink trough that supports a rotatable cylinder which supplies ink from the ink trough to a screen roller. One or more driven disks are situated in the ink trough beneath the rotatable cylinder. These disks aid in the mixing and distribution of the printing ink in the ink trough.

Chamber doctor blade assembly

A fastening leg of a fastening edge of a trailing end of a flexible plate is inserted into a cooperating mounting slit in a cylinder by utilization of a plate trailing end inserting device. The trailing end of the flexible plate is caused to arc outwardly prior to insertion of the fastening leg into the mounting slot. This causes the effective length of the plate to be shortened.

Growing community of inventors

Wachenheim, Germany

Helmut Puschnerat