Koenig & Bauer-aktiengesellschaft

Koenig Bauer-albert Aktiengesellschaft

Hans-Bernhard Bolza-Schunemann

Claus A Bolza-Schunemann

Christian M Fischer

Willi A Kutzner

Erich G Wieland

Albrecht J Germann

A sheet-fed rotary offset printing machine accomplishes multi-color printing. A central impression cylinder carries sheets to be printed as they pass by at least two serially located blanket cylinders. These blanket cylinders are provided with ink images from cooperating plate cylinders. A sheet is gripped only once by grippers of the impression cylinder and is held in this single gripping operation during printing. At least one short inking unit is associated with each printing cylinder.

Sheet-fed offset rotary press

Sheet-fed rotary press

Dryer assembly for supporting and positioning a web

Sheet-fed offset rotary printing machine

A flexible plate is securable to a cylinder by insertion of fastening tabs, provided on beveled or angled ends of the plate, into cooperatively shaped end positioned pockets on the cylinder surface. The pockets may be formed by insert strips that utilize spaced tines to define the individual pockets.

Flexible beveled edge plate fastening device

A flexible plate is securable to a cylinder by insertion of fastening tabs, provided on beveled or angled ends of the plate, into cooperatively shaped and positioned pockets on the cylinder surface. The fastening tabs are spaced axially by interposed tongue and cut-outs. These spaced tabs and tongues form an axially discontinuous joint across the width of the cylinder on which the flexible plate or plates are positioned.

Flexible beveled edge plate securable on a cylinder

Two or more web-fed rotary printing press sections of a web-fed rotary printing press with usual printing units, reel stands, web-leads produce synchronously signatures with longitudinal and cross fold which are supplied to an inserting device of the web-fed rotary printing press for being gathered there to a printed product of many pages and then delivered to a transporting system.

Synchronized web-fed rotary printing presses with inserting drum

The accurate registering and mounting of flexible printing plates on a forme cylinder is accomplished by mounting a printing plate to be brought into proper registration on a support which is adjustable in three degrees of freedom and by then superimposing the supported printing plate with a properly registered transparent proof. The plate is brought into proper registration by adjustment of the support using the proof as a reference. The now registered plate is carried by the support to a position where it can be applied to the forme cylinder. A computer may be used to aid in effecting proper register of the plate with reference to the transparent proof.

Method and apparatus for the accurate registering and mounting of

Individual printed image elements from an image to be inspected are allotted individual nominal ink density values, as by scanning an ideal printed sheet by a CCD matrix camera. The ideal values are stored in a main memory having segments for maximum and minimum values for each image element. A multiplicity of proof images are scanned, and their density values measured and stored for each proof judged acceptable by an inspector. Thereafter, the variations in the acceptable proof density values are stored in the main memory as maximum and minimum acceptable deviations from the initial nominal values for each individual image element to provide a subjective tolerance value for the nominal density values in the main memory.

Method for judging printing sheets

A switchable printing couple particularly suited for use in newspaper and periodical printing is disclosed. A counter pressure cylinder and plate cylinder cooperate to print a moving paper web. An ink fountain, which does not require ink keys, supplies ink to a hard surfaced screen roller. Ink from the screen roller is transferred either directly to an elastic flexographic printing plate or indirectly through ink cylinders to a hard letterpress printing plate. The screen roller which dips into an ink fountain and from which excess ink can be removed by use of a doctor blade, is capable of being engaged with and lifted off the plate cylinder so that the printing couple can be used either in direct printing with an elastic flexographic printing plate or in indirect printing with a hard letterpress printing plate.

Printing couple for newspaper and periodical printing

A simplified inking unit for use with a web-fed rotary printing machine is disclosed. A plate cylinder and inking roller, which uses thinly liquid ink, rotate at the same peripheral speed and have the same diameters. A screened ink metering cylinder and cooperating ink fountain roller have diameters smaller than those of the plate cylinder and inking roller and rotate at lesser peripheral speeds than the inking roller. These two smaller rollers also rotate at different speeds with respect to each other with the ink fountain roller having the slowest rotational speed.

Simplified inking unit

A reciprocal supporting arrangement for contacting cylinders of a printing unit is disclosed. Non-rotating supporting rings are supported by bearings carried on the cylinder shafts interiorly of the side frames. Additional cylinder bearers or cylinder rings are carried exteriorly of the side frames and thus rotate with the cylinder shafts. The combination of the non-rotating inner supports and the rotatable outer supports take the place of conventional cylinder bearers to support the cylinders of a printing press and to impart the necessary stress or tension so that the cylinders properly contact each other.

Growing community of inventors

Wurzburg, Germany

Hans-Bernhard Bolza-Schunemann