Abstract:
An energy curable ink composition comprising an acrylate-functional derivative of soybean oil and one or more further acrylate-functional materials is suitable for printing on a cold-set lithographic press and is cured by exposure to an actinic radiation source located on the press.
Abstract:
Systems and methods for modifying, altering, constructing, or retrofitting an existing newspaper press having a first cut-off length, to have a second cut-off length which is different from and generally less than the first. These systems and methods generally provide for the machining of new bore holes into the existing press unit frame. The new bore holes will generally completely encompass the old bore holes and allow for linear translation of the axes of rotation of the new cylinders relative to the positions of the axes for the old cylinders.
Abstract:
A clamping device of a plate cylinder for recessed in-line varnishing in a rotary press which comprises two axis-parallel clamp bars having a top part and a bottom part, which are circumferentially adjustable in a parallel or an inclined relationship to one another in guides by means of clamp screws bearing against the plate cylinder, and which are axially adjustable by means of axial setscrews, and having a groove extending over the entire length of the clamp bars in the bottom part which provides for the insertion and fixing of reinforced bent ends of the blanket, and the top part is pivotally and slidably connected to the bottom part by locking devices and recesses for the clamping screws, and additional centering means are provided for at least two of the clamping screws.
Abstract:
Apparatus attached to the reciprocating chase of a cylinder press for carrying one or more supply spools of a web of foil-carrying material, together with an adjustable computerized controller and web-pulling rollers associated with the cylinder press and responsive to the controller, for holding a portion of the foil-carrying web suspended above the chase and moving the foil-carrying web a predetermined distance after each impression from the foil onto print stock. An articulated support rack extends from the chase to a structure supporting the web-pulling rollers, to maintain tension in the web as the chase moves. The controller is adjustable to pull a preselectable incremental length of the web a preselectable number of times and to pull a different preselectable length of the web automatically after each group of such selectable number of pulls each having that incremental length.
Abstract:
A process and apparatus for perfecting printing on paper sheets, one side being printed by the offset method and the other side being printed by direct planography, is provided for a five-cylinder sheet-fed offset press having an impression cylinder, first and second plate cylinders and first and second blanket cylinders, the latter being disposed respectively between the plate cylinders and the impression cylinder, wherein one or more printing plates suitable for direct planography are clamped on the impression cylinder in accordance with the size relationship between the impression cylinder and the blanket cylinders, the first plate cylinder and first blanket cylinder are arranged so as not to transfer indicia although the blanket cylinder is engaged with the impression cylinder, the effective diameter (d) of the first blanket cylinder is made slightly less than the dimension that corresponds to an integral multiple (or reciprocal thereof) of the effective diameter (D) of the impression cylinder, and the pressure between the first blanket cylinder and the impression cylinder is adjusted to be greater than the pressure between the second blanket cylinder and the impression cylinder, the second plate cylinder and blanket cylinder being arranged for one side offset printing, and the offset printing process and the direct planography printing each being controlled in known manner.
Abstract:
Web letterpress equipment is converted to offset lithographic equipment by modification of a driven letterpress impression cylinder to receive an offset blanket, thereby producing an offset blanket cylinder. A letterpress plate cylinder is modified to become an offset plate cylinder with accompanying offset inking and dampening equipment. In one embodiment, a driven letterpress plate cylinder of a color hump is packed to become an offset impression cylinder cooperating with the offset blanket cylinder. In a second embodiment, the letterpress plate cylinder of the color hump is modified to an offset color plate cylinder and a driven offset impression cylinder is added to cooperate with the offset printed on one side of a web. When used in combination with similarly converted letterpress plate, impression and color hump plate cylinders, at least three colors may be offset printed on one side of a web or multiple colors printed on opposite sides thereof. The press tower is rewebbed to print with proper registration in the bight between the respective offset blanket cylinders and offset impression cylinders.
Abstract:
A printing unit having at least one press unit, the, or each, press unit having at least one form cylinder, a transfer cylinder, an inking unit and preferably a damping unit, and having at least one imaging device for imaging and/or de-imaging a rewritable and erasable printing form positioned on the form cylinder. The inking unit, if appropriate together with the damping unit, can be pivoted with respect to a form cylinder from a printing position into a rest position. The imaging device can be pivoted with respect to the form cylinder from an imaging position into a rest position. The imaging device is pivoted into a rest position when the inking unit and, if appropriate, damping unit is pivoted into the printing position and, when the imaging device is pivoted into the imaging position, the inking unit and, if appropriate, the damping unit is pivoted into a rest position.
Abstract:
Systems and methods for modifying, altering, constructing, or retrofitting an existing newspaper press having a first cut-off length, to have a second cut-off length which is different from and generally less than the first. These systems and methods generally provide for the machining of new bore holes into the existing press unit frame. The new bore holes will generally completely encompass the old bore holes and allow for linear translation of the axes of rotation of the new cylinders relative to the positions of the axes for the old cylinders.
Abstract:
The intaglio printing machine has three machine stands (I, II, III). Essentially, the impression cylinder (1) and the plate cylinder (2) are mounted in the first stand (I), the stencil rollers (10) and the inking unit (11) are mounted in the second stand (II), and the color-collect cylinder (8) is mounted in the third stand (III). The third stand (III) is adjustable in such a way that it can be removed from the space between the first and second stands and brought into an inoperative position, so that it is possible to bring the second stand (II) up against the first stand (I) to form an intaglio printing machine with direct inking. This results in a convertible intaglio printing machine by means of which a collect intaglio print can be made in a first operating position, in which all three stands assume their working position, and a direct intaglio print can be made in a second operating position, with the use of only the first and second stands.
Abstract:
The squeegee arm and screen frame portions of a tilt screen type screen printing machine are pivotally connected to specially designed rocker housings slidably movable along horizontal support rods. The rocker housings have portions which are not rotated by pivoting of the squeegee arm and screen frame, thus permitting such rocker housing portions to be horizontally driven along the support rods by rodless air cylinders mounted on the machine. Additionally, the nonrotatable portion of the screen frame rocker housing carries a horizontally disposed gear rack which can be operatively mated with a pinion drive gear portion of a rotatable fixture supporting a round item to be printed so that horizontal translation of the rack rotationally drives the fixture during the screen printing process. Because of the rocker housing design, upward tilting and horizontal movement of the screen frame does not disrupt the rack and pinion registry. The machine is provided with a variety of special attachments which permit it to carry out a two-color hat printing process and a pad printing process in addition to single-color flat and round article screen printing processes. Additionally disclosed is the conversion of a conventional screen printing machine to a pad transfer printer.