Abstract: A draw-in device for feeding a plurality of printing stock webs, preferably paper webs, in which draw-in elements of finite length grasp the start of a paper web and draw it out of reel changers and draw mechanisms through printing units and up to folding units. An electronic memory is provided in which are stored the lengths of all possible feed paths in the printing machine and the draw-in elements can be switched on at different times corresponding to the different lengths of the feed paths and the resulting time differences at a given feed rate via an electronic computer connected with the memory and can be switched off simultaneously. It is also possible to refeed a web of printing stock which was torn during the print process so as to substantially reduce wasted paper.

Abstract: To prevent tooth-to-tooth engagement of an interengaging gear-worm pull-in arrangement for a paper web threading system for a printing machine, a transport sprocket wheel (10) is retained in a movable bearing (16), movable along an angle (.alpha.) which is an acute angle with respect to the axis of the pull-in element (1,2), and engaged with the pull-in element by a force acting counter the direction of movement of the pull-in element. The transport wheel center is, when engageable with the pull-in element, located along a bisector (19) of an angle (.beta.), which angle (.beta.) is defined by a tangent (17a) at a first contact point (17) between the transport wheel (10, 10b) and the drive wheel (12, 12b) and a second tangent line at a second contact point (18) between the pitch circle of the transport wheel (10, 10b) and the pull-in element. The bearing of the transport wheel can shift linearly, or along a small arc, the force being generated by the weight of the wheel or by a spring.

Abstract: To adhere an underlay in the clamping groove of a printing machine cylinder, for example a blanket cylinder of a rotary sheet offset printing machine, magnetic foil strips (7, 8, 23, 24, 33) are provided, clamping the end portion (6, 22, 32) of the underlay (4, 19, 30) either between two foil strips (FIGS. 1, 2) or against a magnetic portion within the groove, typically the inner side wall surface (9, 20, 34) defining the groove. The other end portion of the underlay can be left free, and will be clamped in position by stretching the rubber blanket or printing plate, respectively, over the cylinder.

Abstract: To provide for selective printing by a five-cylinder printing machine either in single prism printing (1/0) or double prime printing (2/0) or prime-and-verso printing (1/1), at least one (3) of the printing cylinders can be selectively positioned by a crank arrangement (16, 15, 15a) which is coupled to a link (13) which link, in turn, operates a lever of an eccentric bearing (12) such that when the first printing cylinder (3) is to be, selectively, in engagement with either the impression cylinder (1) or the second blanket cylinder (2), the link is in a position at which the link passes through the axis of rotation of the crank so that reactive rotary forces from the blanket cylinder will not be transferred to the crank and hence will be isolated from an operating element (18) which moves the crank arrangement. Preferably, the crank arrangement is formed by a gear segment (15) which is rotated by a segmental gear (16), coupled to a linear piston--cylinder arrangement forming the operating element (18).

Abstract: To permit exchange of printed subject matter carried on a plate of a plate cylinder (10, 16) of two printing couples (8, 10; 12, 16) which are selectively engageable with an impression cylinder (4) which, for example, can be a blanket cylinder of another printing couple (3, 4), while continuing to print information from one of the plates (10, 16) of a selected one of the first two printing couples, clutches (9, 15) are provided to engage the respective printing couples through drive gears mounted on the shafts of the respective blanket cylinders (6, 12); circumferential register of the associated plate cylinders (10, 16) is obtained by axial shifting of the blanket cylinders (6, 12) and use of spiral gears in which the gears connecting the blanket cylinder and plate cylinder (6, 10; 12, 16) of one printing couple have opposite direction of gear inclination to the drive gear (7, 13) selectively engageable with the main machine drive, for example through a gear (5) on the impression cylinder (4) which, in turn,

Abstract: The guide tube (16) is formed with a longitudinal slit which can be bent about a bending drum (6) of standard construction. In order to additionally introduce a longitudinal or spiral twist, a twisting element can be clamped about the tube, to introduce a twist, manually (FIGS. 1, 2), or upon rotating of the bending drum or disk (FIGS. 7, 8) by a coupled gearing. To retain the slit of the tube in proper dimension and alignment, and prevent deformation of the tube, a counter element with a groove (5) therein matched to the circumference of the tube is provided, and an insert strip (18) is located within the tube, which insert strip preferably has externally projecting portions (18a) for guidance of the strip between the counter element and the bending tube or disk, and a recessed portion (18b) extending within the slit (17) to prevent deformation of the tube and of the slit during twisting and/or bending of the tube.

Abstract: To permit selective operation of a rubber blanket--plate cylinder couple located, respectively, above and below an impression cylinder for double prime printing, prime-and-verso printing, or printing plate change while printing is carried out with a remaining couple and during operation of the machine, two clutches (21 or 25) selectively feed a main rotary drive from a main gear (18, 19) to the drive gears (22, 23) of the upper blanket cylinder--plate cylinder couple (2, 4) or, upon operation of a clutch (25) via drive gears (26, 27) to the lower blanket cylinder--plate cylinder couple (3, 5). For prime-and-verso printing, only one of the clutches (e.g. 21) is operated.

Abstract: To simplify a transverse stretching apparatus and provide rollers which do not require a change in the respective axes of rotation, two rollers are located adjacent, parallel, and spaced from each other, in which each of the rollers have outer cylindrical sections of respectively different diameters, with an intermediate essentially conical section, merging smoothly with the outer cylindrical section. The rollers are so located that the smaller diameter circumferential section of one of the rollers (4) is opposite the larger circumferential section of the other roller (5), and, when in essentially axial alignment, define a neutral position in which the sums of the diameters of the rollers at any axial plane passing transversely through the axes of rotation, will be the same. Upon relatively axially shifting the rollers with respect to each other (compare FIGS.

Abstract: Liquid is moved axially along a liquid roller (1) by a transport roller (2) from end regions towards the center region by forming the transport roller (2) with two conical surface regions (4, 5) which, alternately, are tipped in engagement with the liquid roller (1) while the respectively engaged conical section (e.g. FIG. 1: 4) is axially moving towards the center region of the liquid roller (1).

Abstract: For securing a web of material to the hook of a web threading apparatus, two flexible, magnetic plate elements are provided, between which the leading end of the web of material to be threaded can be clamped and which are connected with a loop for attachment to the hook. To maintain the web in alignment with respect to a plane defined by a longitudinal slit in a guide tube, and a guide tube axis, the magnetic plate elements are placed at the trailing end of a pulling connection (21) of pointed triangular form, having an intermediate, longitudinally resilient portion to absorb pulling shocks, and a head portion which has a lateral bead and can be threaded over open eye portions (33) of connecting elements (32) extending through the slit (31) of the guide track tube (30).

Abstract: Drive power for axially oscillating a rider roller (1, 27, 60) is obtained by coupling the rotary movement transferred thereto by frictional engagement with a counter roller (2, 28, 61) to an internal gearing, coupled to a cam - cam follower arrangement over a reduction gearing. The system is particularly suitable for moving fluid film, for example printing ink from an end region of the counter roller, which may be an ink application roller, towards the middle, by use of two jacket portions (4, 5; 30, 31; 63, 64) on the rider roller, which jacket portions come in engagement with the counter roller only when the axially oscillatory movement of the particular jacket portion is from an end portion of the counter roller towards the middle; upon reversal of the stroke of the axially oscillatory movement, the other jacket half, by eccentric offset, then comes into engagement with the counter roller to then, again, move film or liquid from the other end portion towards the center of the counter roller.

Abstract: To transfer ink from an ink trough (2, 3) to an ink receiving roller (1), the ink is transferred in the form of axially adjacent rings or circumferential strips of ink. The rings or strips of ink are generated by placing two superposed plates (4, 5), each having front edges (A, B) with recesses or notches (16, 18) therein, the ink flowing through the notches. The width of the ink strips is controlled by axially shifting one of the plates (5) with respect to the other (4) by engagement of the shiftable plates with an eccenter (11-14). The transferred circumferential strips or rings are then milled in the standard milling roller arrangement of printing machine inkers.

Abstract: A stripper for a printing machine cleaning device includes a shaped pressure hose, which is disposed parallel to the roller of the printing machine that is to be cleaned. The cross-sectional shape of the hose can be varied by being pressurized. The surface of the pressure hose remote from the roller is secured on a rigid rail, while the surface of the pressure hose remote from the rail can be pressed, as a result of pressurization of the hose, against the roller.

Abstract: An apparatus for printing the back, or "verso", side of a sheet being fed from a sheet-fed printing press into a delivery unit, the sheets being conveyed by an endless loop conveyor made up of a pair of laterally spaced conveyor chains. Cross members extend between the chains at regular intervals and carry grippers for gripping the leading edge of a sheet. The chains are guided so that they form a delivery run and a return run spaced apart and generally parallel to one another. An impression cylinder is journalled between the runs having an axial length which is shorter than the lateral spacing between the chains. A blanket cylinder is journalled outside of the delivery run in rolling engagement with the impression cylinder. A plate cylinder having inking and dampening systems is in rolling engagement with the blanket cylinder. The impression and blanket cylinders have mating longitudinal grooves of a size sufficient to provide free passage for the cross members and grippers.

Abstract: To permit application of a liquid, such as a lacquer, an ink dryer, or a coloring or area inking liquid to a sheet of paper being transported from a printing machine by a conveyor chain (6), a liquid application cylinder (14) is positioned between the upper (5) and lower (4) run of the chain.