Abstract: A process for manufacturing multilayer printed circuit boards having conductive patterns located in three planes by assembling a stack of laminate layers with at least one prepreg between adjacent laminate layers, the laminate layers having holes around a periphery thereof for aligning the laminate layers with respect to each other. Then, the stack of laminate layers and prepregs are secured together with fastening elements, such as rivets, which deform the outermost laminate layers towards each other such that the outermost ends of the fastening elements are spaced a distance apart less than the maximum thickness of the stack. Finally, the stack of fastened laminate layers and prepregs is subjected to heat and pressure during a curing step which may follow or precede the securing step.

Abstract: To provide ready access to printing cylinders, including, for example, a satellite cylinder (4), plate and blanket cylinders, and inkers and dampers of a printing system in which the printing couples and associated inkers and dampers are located, essentially, in Y configuration, the side walls of the machine are constructed to have two upstanding arms (2) and only a single support leg (3) to form an amputated or truncated H structure, leaving a space (S) beneath one of the upstanding arms (2) which provides ready access to an operator (I). The upstanding arm (2) which is not above the leg (3) is supported by a post or column structure 20 which, preferably, has a platform (22) thereon. The paper web can be guided in an upwardly extending path (A, B), from either side of the machine, and access to all cylinders and rollers is provided from the left and right side of the machine, respectively, under all paper path (A, B) conditions.

Abstract: To improve the uniformity of application of damping liquid, typically water, to a plate cylinder (8) of an offset rotary printing machine, a non-contacting, typically spray damper (18) sprays or otherwise applies damping liquid on a damping liquid accepting cylinder (19) with a hard, preferably chrome-plated surface. The damping liquid is applied to the plate cylinder by an application cylinder or roller (21) having a soft, for example rubber or textile surface. A transfer cylinder (20) transfers the water between the accepting roller (19) and the application roller (21). In accordance with the invention, the transfer roller (20) has a soft, for example rubber surface. The soft or rubber surface apparently causes formation of an ink-damping liquid emulsion on the surface thereof which is extremely fine grain to provide a highly uniform coating of damping liquid to the application roller (21).

Abstract: In order to eliminate the contaminant particles collecting between the inking roller in the inking system of a rotary printing machine and the doctor blade, a strip or wiper element of elastic material extending in the axial direction and projecting from the surface of the inking roller is glued onto the surface of the ink roller or inserted into grooves thereon to pick up and transport small contaminants from the trough into the ink path where they are harmless.

Abstract: To attach a printng plate (2) to a plate cylinder (1) having a groove therein, the groove has converging inner walls (10, 11) and a two-part attachment clamping wedge (5, 6) is provided, the clamping wedge being spring loaded to clamp an end portion (A) of the plate (2) between one part (6) of the wedge and an adjacent side wall (10), the other end portion (E) of the plate (2) being clamped between the two parts (5, 6). The parts have, in cross section, approximate trapezoidal shape. The two-part clamping element permits release of the plate by pressure (P) from the outer face of the cylinder (1) counter the force of a spring (8) which presses the clamping wedge parts (5, 6) towards the outside via a support plate (4). Preferably, the arrangement is symmetrical about a centerline (M) so that slight canting or tilting of the clamping wedges is possible for easy release of the plate (2) after installation.

Abstract: To permit ready access of operators to printing cylinders located above each other, in which the paper web is introduced laterally towards the cylinders in an upwardly directed path, a guide roller (6) is provided which is held at the end of pivot arms (8) and movable from a position remote from the printing cylinders, so that the upwardly directed path (A) will provide access to an operator standing beneath the then horizontally extending portion of the path, and a position close to the printing cylinders, so that the upwardly extending path (A') will be close to the printing cylinders and permit an operator standing on a movable platform (10) to reach the upper printing cylinders (right side of the figure). The movable platform (10) preferably is hinged upwardly of a platform on which the operator can stand if access to the lower cylinders is desired.

Abstract: To permit, selectively, ready access by an operator to printing systems of a multiple system printing machine in which the printing systems are located above and below a laterally introduced web of paper into the machine, the paper path is arranged to be guided, selectively, with a horizontal portion either following a vertical portion, to permit an operator to stand beneath the paper web for access to the lower printing systems (FIG. 1) or, selectively, to position the vertical portion adjacent the printing machine to permit an operator to stand on a movable platform (11) and have access to the printing system above the paper web (FIG. 2), a paper guide roller (6) is vertically movable between an upper position (6, 13, 14) and a lower position (6', 13', 14'). Paper web tension can be maintained by an additional deflection guide roller (8) which is tilted, together with the platform (11) to an engagement position (FIG. 2: 8'), or the paper may hang through (FIG. 3).

Abstract: To permit clamping of a flexible printing plate (2) around a circumference of a printing cylinder (1) in either direction, a clamping groove (3) is formed with two inclined side walls (4, 5) which converge towards the open side of the groove, and are positioned in mirror-image relation with respect to a central plane (10) passing through the midpoint of the groove. A leaf spring element (11, 12; 11', 11"; 12') having two clamping portions (13, 14), shaped and positioned to fit against opposite walls (4, 5) of the groove, clamps the end portions (8, 9) of the plate against one of the side walls, the clamping portions being pressed into position by a clamping wedge body (16) having matching outwardly shaped surfaces and fitting against the clamping portions of the spring, the clamping wedge body being pressed outwardly to wedge the clamping wedge body (16) by a compression spring (15) bearing against the bottom (6) of the groove.

Abstract: To permit removal of an ink trough holding ink from an inking structure, the structure is formed with separable upper (2) and lower (3) portions, the upper portion being formed with an outlet (4) which, in cross section, is essentially funnel-shaped; a closure element (9), for example in form of a ball or a cylinder (4') fitting into the funnel-shaped opening (4) is positioned in the upper portion which has a lower inclined surface (13) leading, essentially tangentially, towards an ink transfer or ductor roller (6). A doctor blade (5) is positioned between the upper and lower portions adjacent the outlet (4) from the trough so that, upon moving the closure element (4') into the funnel-shaped opening, and separating the portions, for example by loosening of a bolt (7), the upper portion can be removed for cleaning or exchange of ink without disturbing the doctor blade and its adjustment.

Abstract: The invention relates to a drive arrangement for a changeable satellite printing mechanism of a rotary printing machine in which at least two main subject matter printing cylinders, that is, cylinders directly carrying subject matter to be printed, or transfer cylinders, can be selectively engaged with a common counter cylinder or with each other, in which arrangement the main subject matter printing cylinders can be selectively coupled with the counter cylinder or with each other while maintaining registry by selective teeth engagement of one or two sets of cylinder gears secured to the drive shafts of the printing cylinders, and at least one of the two subject matter cylinders is rotatable about a predetermined angle upon shifting of their drive shafts.