Abstract: A method of and apparatus for minimizing the problem of "fluting" or "corrugating" occuring in printed webs of light weight coated paper printed on both sides with thermosetting ink on heat-set web-offset printing presses resides in spreading the web in its width-wise direction as the printed web exits from the ink drying and heat setting oven of the press and passes over the web cooling chill rolls downstream from the oven, thereby to hold the printed web in a flat and smooth condition until it is cooled and the ink has taken a permanent set. Spreading the web prior to and during cooling allows the inks to thermoset in a flat state because the web is kept flat and free of flutes during thermosetting of the inks. The method and apparatus facilitate operation of the press at higher speeds and with lighter grades of paper than conventional, and provide for increased production efficiencies, lower costs, enhanced print quality, and access to new markets for web-offset printing.

Abstract: A supporting device is adapted to support a rolled recording sheet. The rolled recording sheet has a flange with a supporting axis on each end portion, and is supported detachably and rotatably through the flange by the supporting device. The supporting device is formed of a pair of holders, each including a main body fixed to a predetermined position, a supporting portion disposed to the main body movably within a predetermined range for supporting the supporting axis of the flange, and an urging device for urging the supporting portion for a side surface of the flange.

Abstract: A device for tensioning printing formes (or "printing plates") on a forme (or "plate") cylinder of a rotary printing machine, including a stretching shaft extending through a gap formed in the cylinder, the stretching shaft holding receiving elements and, opposite thereof, clamping surfaces gripping the trailing end of a printing plate, with individual tensioning elements being mounted side by side on the stretching shaft, and the stretching shaft being stretchable, via adjusting elements, linearly in axial direction in order to optimally tension the trailing end of the printing plate independently of a possible stretching of the printing plate.

Abstract: A rotary embossing machine includes an embossing mechanism in which an embossing gap is formed between an embossing cylinder and a counter pressure cylinder. For conveying an embossing film web through the embossing gap, the rotary embossing machine includes a conveying mechanism for producing a movement of the web at the same speed as a material layer to be embossed, during an embossing interval. The film conveying mechanism includes a pulling device downstream of the embossing gap which is provided with a slip drive for the embossing film web and a controllable film supply device upstream of the embossing gap which cooperates with the pulling device. This arrangement avoids the risk of the embossing films or foils tearing and improves the embossing quality.

Abstract: A belt-type printing machine, especially for a plurality of colors, comprising at least one printing station (2) containing a frame (1), idler rolls (7) arranged in bearings therein, an impression cylinder (6) for guiding a continuous web (8) to be printed arranged in preferably fixed bearings on the frame (1), a plate cylinder (3), two sprocket wheels (4, 5) coaxially mounted to but not commonly driven with the plate cylinder (3) and at least one tensioning cylinder (10), around which an endless belt (11) extends having at least one flexible printing plate and being provided with perforations for the sprocket wheels (4, 5), wherein an inking assembly (13) allocated to the flexible printing plate of the belt (11), a drive acting upon the sprocket wheels (4, 5) to the belt (11) and an additional single drive (32) acting upon the plate cylinder (3) to the belt (11) for the purpose of avoiding the jump movement between the perforations of the belt and the pins of the sprocket wheels are provided.

Abstract: A pair of web pulling cylinders, particularly for use in printing machines, wherein a single-layer or multiple-layer web is conveyed between the cylinders which are pressed together. The cylinders are driven and are in driven connection through drive elements mounted on cylinder journals. If the web is deflected around one of the cylinders, a differential gear unit is provided to adapt the circumferential speeds of the cylinders to the thickness of the web being pulled.

Abstract: This invention relates to an offset type rotary press adapted for a color printing system, with printing sections, which prevents print-shears and produces printed matter in high quality. The system of this invention includes an extending area which supplies to the travelling paper web the power to extend in width direction, and at least two printing sections arranged in sequence at the position where the paper web travels after passing through the extending area.

Abstract: This invention relates to an offset type rotary press adapted for a color printing system, with printing sections, which prevents print-shears and produces printed matter in high quality. The system of this invention includes an extending area, which supplies to the travelling paper web the power to extend in the width direction, and at least two printing sections arranged in sequence at the position where the paper web travels after passing through the extending area.