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: A method for isolating regions of silicon involving the formation of openings that have a suitable taper in a block of silicon, thermally oxidizing the surfaces of the openings, and filling the openings with a dielectric material to isolate regions of silicon within the silicon block. The method is particularly useful wherein the openings are made through a region of silicon having a layer of a high doping conductivity.

Abstract: A process which utilizes an anodized porous silicon technique to form dielectric isolation on one side of a semiconductor device is described. Regions of silicon semiconductor are fully isolated from one another by this technique. The starting wafer typically is predominantly P with a P+ layer thereon. A P or N layer over the P+ layer is formed thereover such as by epitaxial growth. The surface of the silicon is oxidized and a photoresist layer applied thereto. Openings are formed in the photoresist. Openings are formed in the silicon dioxide using the photoresist as a mask and appropriate etching techniques. The openings in the silicon dioxide define the regions to be etched by reactive ion etching. Reactive ion etching is accomplished at least down to the P+ region. The structure is then subjected to the anodic etching technique which preferentially attacks the P+ layer to form porous silicon throughout the P+ layer.

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.

Abstract: A sheet feeding table has pull-type side lays and front lays. Mounted beneath the feeding table and nearer the front lays are suction drums spaced apart and rotated by a transversely extending drive shaft on which they are mounted. The shaft is driven through toothed wheels having relative axial movement with respect to each other. A cam plate rotates with the shaft and a pair of fixedly mounted rollers guide the cam plate and impart reciprocating motion to the shaft and the suction drums. The lateral shifting of the suction drums clears the sheet from the pull-type side lay for the successive sheet. Each drum has a suction piece sealed and biasedly positioned adjacent a portion of the inside peripheral surface of the drum which rotates thereby and brings the drum suction holes into communication with the suction chamber within the suction piece. The suction chamber is in communication with a vacuum supply and a control valve is interposed in the supply.