Abstract: A device is provided for use in the alignment of sheets transverse to a direction of sheet travel. A sheet retaining device, which conveys the sheets, is displaceably mounted for holding the sheets against a side guide. At least two sheets are situated one above the other in an offset manner in the direction of sheet travel. An effective retaining surface extends in the direction of sheet travel and has a longitudinal length greater than a transverse width. A ratio of the longitudinal length of the effective retaining surface to the width of the transverse width of the effective retaining surface is greater than three.

Abstract: A device is provided for use in the alignment of sheets transverse to a direction of sheet travel. A sheet retaining device, which conveys the sheets, is displaceably mounted for holding the sheets against a side guide. At least two sheets are situated one above the other in an offset manner in the direction of sheet travel. An effective retaining surface extends in the direction of sheet travel and has a longitudinal length greater than a transverse width. A ratio of the longitudinal length of the effective retaining surface to the width of the transverse width of the effective retaining surface is greater than three.

Abstract: A short inking unit for a rotary printing machine is provided. The short inking unit includes a changeable machine glazing cylinder.

Abstract: A printing unit for a rotary printing press utilizes form cylinders, blanket cylinders and ink cylinders and transfer rollers. Intermediate support rings are provided on these cylinders or rollers.

Abstract: The invention relates to a short inking system for a rotary printing machine with a changeable machine glazing cylinder (05).

Abstract: A method for driving a printing press having, (i) an impression cylinder, (ii) at least one cylinder group having (a) a blanket cylinder, (b) a printing form cylinder, and (1) an imaging device, (2) an inking unit, and (3) an inherent drive system, all for said printing form cylinder, (iii) a sheet feeding device, (iv) a sheet delivering device, (v) a drive wheel train connecting the cylinders and the inking unit, and (vi) optionally a main motor drive, the method comprising detaching the printing form cylinder from the drive wheel train, driving the printing form cylinder by the inherent drive system at imaging speed during image formation, and re-attaching the printing form cylinder after image formation to the drive wheel train in an operating phase position.

Abstract: Sheets are printed by being automatically run twice through a printing machine. The first sides of each of the sheets are printed in one, or a plurality of colors during a first printing pass. The sheets so printed are then placed in an intermediated storage facility, which is located within the printing machine. These sheets are then rotated 180 degrees and are printed on second sides in one or a plurality of colors during a second printing pass. The sheets are then fed to a final storage device.

Abstract: 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.

Abstract: 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.

Abstract: The position of a printed web passing through an elongated dryer is shifted laterally during passage of the web through the dryer. A component of the resultant of all of the frictional forces acting on the web is caused to point in the lateral direction of the desired web shaft. This resultant of the frictional forces is obtainable by changing the spacing of blower nozzles, or by changing the pressure of discharged drying fluid across the width of the web.

Abstract: A sheet-fed offset rotary printing machine is used for multicolor printing. A plate cylinder and a rubber blanket cylinder are utilized, as are first and second impression cylinders. Either of these two impression cylinders is operable with the blanket cylinder. Sheets to be printed can have a length corresponding to a nominal diameter, or to twice a nominal diameter. The first impression cylinder has a plurality of controllable gripper systems while the second impression cylinder has at least one controllable gripper system.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: In a sheet feeder for rotary printing presses having a feed table, a side register lay, and front register lays, a first push type conveyor is positioned in advance of the front lays and a second push type conveyor is positioned between the front lays and the continuously rotating impression cylinder of the printing press. These first and second conveyors cooperate to sequentially grip and convey sheets of paper and the like to the press's impression cylinder which is equipped with register lays and grippers. The feed table's front register lays are arranged to lift the first registered sheet thus permitting a succeeding sheet to advance beneath the raised sheet.