Abstract: A method of printing on a web of paper includes the steps of providing the web, adjusting a tension on the web and sequentially printing each of a plurality of different indicia on defined sequential longitudinally spaced printing fields of the web. Information is then printed in each of the defined printing fields on the web. Preferably, the method is used for printing bingo game booklets in which each sheet of the booklet is identified by a different color or border than is each other sheet in the booklet. The apparatus includes a roll stand from which the web is fed and an indicia printing unit. The indicia printing unit includes a plurality of indicium rolls supported by and spaced around a frame and an endless printing belt supported by the rolls, the printing belt having a plurality of sequentially longitudinally spaced print areas.

Abstract: A transmission device for a printing machine having an endless transmission element, and rotating bodies around which the transmission element is wrapped, includes a tensioning device for tautening the transmission element, and an actuating device for displacing a first one of the rotating bodies parallel to the axis of rotation thereof, the tensioning device being formed by the actuating device, the actuating device having a tensioning shaft operatively connected to the first rotating body, the tensioning shaft, when rotated about a longitudinal axis thereof, causing a lateral displacement of a center-of-mass line thereof.

Abstract: The present invention is a flexographic printing apparatus for printing single images on a continuous web of material using a belt-type printer and for easily and rapidly creating flexible packaging by bringing the printing operation in-line with the bag converting or packaging material machines. In a preferred embodiment, the printing apparatus includes a frame having an impression cylinder and a nip roller rotatably mounted to the frame in close proximity to the impression cylinder such that the nip roller bears on the impression cylinder, a printer mounting attached to the frame and movable laterally relative to the impression cylinder, a belt-type printer mounted on the printer mounting and means for transferring rotation of the impression cylinder to the printer. The frame may be fixed to a post-printing processing machine or may be free-standing for easily moving the invented apparatus to various locations.

Abstract: A process and apparatus for printing with a press at least one image by transfer of an electrostatic colorant vehicle between an intermediate transfer element and a printing carrier, including the steps of making the intermediate transfer element in the press by magnetically developing zones on a substrate, depositing a magnetic, insulating, and hardenable material on the substrate to constitute the zones, hardening the hardenable material, subjecting the hardenable material to an electrostatic charge in order to lend the zones an affinity for the colorant vehicle, and transferring the colorant vehicle to the printing carrier by directly contacting the intermediate transfer element to the printing carrier.

Abstract: The invention relates to an attachment for securing an end-part of a toothed belt-element (12, 14) to a machine element (10). The machine element (10) has a slot (18, 16) for receiving an end-part of the belt-element. Arranged on at least one of the opposing walls of the slot is at least one gripping bar (22, 28) which projects into the slot and the cross-sectional shape of which corresponds generally to the cross-sectional shape of a tooth-space formed recess (24, 30) in the end-part (14a, 12a) of the belt element.

Abstract: A belt-shaped element for printing textiles. The belt is a sandwich structure shaped to conform around two textile printing machine cylinders, and operative to move fabric articles thereon past printing stations with minimal registration error. An exemplary belt has at least one outer elastomer layer, or "working layer," and an inner "cylinder" layer that is innermost against the printing machine cylinders. An exemplary cylinder layer comprises a sheet of fibers oriented longitudinally and having a rigidity of 10.sup.6 -10.sup.7 megapascals in the longitudinal direction. Other exemplary belts comprise an intermediate layer between the outer elastomer and inner fiber sheet layers. An exemplary intermediate layer comprises a layer of transverse fibers.

Abstract: An electrostatic printer employing a photoconductive belt wrapped around multiple rollers. A motor drives a first roller. An elastic belt is wrapped around the first roller and a second roller, allowing the first roller to drive the second roller.

Abstract: A compact, low-height offset press of simple construction is easy to use, needs no after-use maintenance such as cleaning the ink roller and is designed for fully automatic operation. Plate support 1 and blanket support 10 consist of endless belts. Etching unit 60, dampening unit 70 and inking unit 80 are placed along the periphery of the plate support. An unetched plate is supplied from the plate supply unit and etched automatically for printing. When the press is not in use, anti-drying tank 95 moves up, enclosing the roller(s) in liquid, to prevent any ink on the roller surfaces from drying.

Abstract: A printing blanket including a base fabric and a surface layer in a laminated structure wherein a surface reforming agent containing a perfluoroalkyl group is applied to the surface layer such that a critical surface tension ranging from 10 to 16 dyn/cm appears on the surface of the surface layer is disclosed. To practically manufacture a printing blanket of the foregoing type, there is also disclosed a method wherein a compressible layer is placed on a base fabric, a surface layer is then placed on the compressible layer thereby to form a laminated structure with the base fabric and the compressible layer, and thereafter, a surface modifier containing a perfluoroalkyl group is applied to the surface layer such that a critical surface tension ranging from 10 to 16 dyne/cm appears on the surface of the surface layer. It is preferable that the surface layer is molded of a compound based on a nitrile butadiene rubber.

Abstract: A screen printing process and apparatus for automatic coating, exposing and developing of a continuous belt-type printing screen. A segment of the belt is coated with photoemulsion, then dried, selectively exposed, and developed. After drying again, the segment is wetted with ink and the developed image is transferred to paper or other medium. After transferring the image, the segment is conveyed to baths to loosen and remove both residual ink and the emulsion. The segment is then coated again, completing a cycle. The medium receiving the image is dried and then may be re-inserted to be de-inked and reused. This is accomplished by sublimation transfer. Exposure of the emulsion coating of the printing screen by a video display device such as liquid crystal, light emitting diodes or cathode ray tube is discussed.

Abstract: A liquid coating apparatus capable of applying a liquid coating fluid to a workpiece traveling over a press cylinder rotatably mounted in a printing press is provided. The coating apparatus includes an applicator means which communicates with the press cylinder to form a nip site when the coating apparatus is in a operative position. The applicator means transfers the liquid coating fluid from the coating apparatus to a workpiece that has been caused to travel through the nip site. The applicator means includes an endless coating plate belt driveably mounted upon two support rollers, thereby affording communication of the endless coating plate belt with a press cylinder which has limited access to its surface.

Abstract: This invention refers to a rotary printing machine with at least one counterpressure cylinder and at least two printing belt cylinders around which a continuous printing belt carrying printing forms and printing pictures is led, with one cylinder thereof being provided with a radial ring of pins in the region of each of its ends, wherein the pins thereof mesh with holes of edge-side tracks of holes of the printing belt for a slip-free guiding of the latter. For the solution of the problem to develop a rotary printing machine of that kind which can be easily and rapidly converted for continuous printing belts of different width without exchanging the printing cylinder, the printing belt cylinder is provided with bores at a distance from the end-side pin rings on at least one circumferential line corresponding to the distance of the pin spacing of the pin rings, in which extendable and retractable pins are arranged.

Abstract: A rotary press comprises one or more impression cylinders (1) and a plurality of printing units, each of which comprises an inking unit (I) and an endless block belt (4). The block belt (4) is trained around a plurality of cylinders (5, 6, 7, 8), one of which (7) is movable into engagement with an associated impression cylinder (1). In the rotary press, the block belt of each printing unit is trained around four cylinders, which are disposed at the corners of a square or parallelogram. Two diametrically opposite ones (7, 8) of the cylinders are movable into engagement with the inking unit (I) and a picture-carrying web or an associated impression cylinder, and the two other diametrically opposite cylinders (5, 6) are tensioning cylinders, which are movably mounted in tracks (31) and, by a drive device (39), are movable toward and away from each other.

Abstract: A method and apparatus for printing a single image at a time in a flexographic printing environment. The present invention utilizes a flexographic plate cylinder which has been modified by forming a groove in its circumference. The groove extends partially around the circumference of the cylinder, leaving an area approximately equal to the area of a single flexographic plate. A belt having a plurality of flexographic plates mounted thereon is entrained about the printing cylinder coincident with the groove and raised area. The groove prevents transfer of the flexographic image to a film passing between the impression cylinder and printing cylinder. Only when the raised area is adjacent the impression cylinder will an image be transferred from a flexographic plate. In addition, only the plate over the raised area is inked when the flexographic belt passes an anilox inking roller. This prevents the accumulation of ink on plates that are not used for image transfer on a particular rotation of the belt.

Abstract: Method and apparatus for synchronously controlling a printing speed of a belt-type printing machine including a plate cylinder, a tension roll for adjusting a distance between the plate cylinder and the tension roll, and an endless printing belt detachably wound around the plate cylinder and the tension roll. According to the present invention, sprocket wheels each having thereround sprocket pins for engaging perforations of the endless printing belt are rotatably mounted on the plate cylinder so that the sprocket wheels have no function of driving the endless printing belt and are only intended to guide the belt along a predetermined path and prevent it from lateral movement relative to the plate cylinder. The endless printing belt is driven only by a frictional force between the peripheral surface of the plate cylinder and the belt. With independently detecting the number of rotation of the sprocket wheels, i.e.