Abstract: The invention relates to a positioning apparatus for positioning flexible printing plates on printing cylinders, wherein the printing plates are provided with at least one mark functioning as reference, wherein the apparatus comprises: a support device for a printing cylinder; at least one camera which is adapted to record the image of the at least one mark of the printing plate positioned on the printing cylinder; and a monitor for enlarged display of the image recorded by the at least one camera, wherein the positioning apparatus is provided with a registering device for registering the image recorded by the camera. Using such a registering device it is possible to establish that the marks are located at the correct position. By making a copy of the data thus inputted into the register, evidence can be provided that the flexible printing plate is placed in the correct manner.

Abstract: A device for registering the position of a printing plate on the plate cylinder of a printing machine includes sensors responsive to being covered by the printing plate, the sensors being provided on one of the plate cylinder and an attachment device of the plate cylinder, respectively.

Abstract: A printing plate is held at one point thereof by a holding portion provided at a surface plate. When pushed by a pushing portion, the printing plate is only rotationally displaced. Thus, an angular error is substantially eliminated and displacement of the printing plate is small. Then, the pushing portion positions the printing plate in a direction perpendicular to a direction in which the surface plate can be moved. Then, movement of the surface plate positions the printing plate in the direction in which the surface plate can be moved.

Abstract: The present invention provides a method of detecting the locations of right and left register marks respectively burned onto right- and left-hand side portions of a printing plate based upon image data of images respectively captured within an image processing area with right and left vertical edges respectively extending in the Y-direction, and upper and lower horizontal edges extending in the X-direction.

Abstract: An apparatus is provided for configuring a printing station of a lithographic system to align a workpiece with a printing cylinder of the printing station. The apparatus includes an elongated body attached in a predetermined fashion to a platform which supports a workpiece disposed for delivery to a printing cylinder. Two cross-arms are spaced apart and attached to the body member. The first cross-arm comprises two half-portions, each of which is adapted for adjustable lateral extension. The second cross-arm is knight attached to the elongated body, and disposed for adjustable positioning along the body in relation to the first cross-arm.

Abstract: A register draw-in device for sheet printing and embossing machines has two front or leading edge stops and a side stop, and position sensors (S1, S2, S3) for detecting print marks (P1, P2, P3) of a sheet (5). Two detectors (D1, D2) associated with the front stops (A1, A2) detect the sheet leading edge. The front stops are adjustable by control elements (M1, M2) until front print marks (P1, P2) on the sheet are detected by sensors (S1, S2). A control element (M3) then adjusts the side stop (A3) until a side print mark (P3) is detected by another sensor (S3). A system control (11) controls this register correction with the position sensors (S1, S2, S3), the detectors (D1, D2) and the control elements (M1, M2, M3). This accomplishes reliable automatic register correction for each individual sheet and therefore maximum print quality.

Abstract: A pin registration bar aligning an image film to a screen mesh of a screen printing frame. The pin registration bar has a bar and a plate, The bar has an upper surface, a lower surface, and a pair of side surfaces. The plate has a pair of generally parallel surfaces. A portion of one of the parallel surfaces engages the upper surface of the bar. The plate is mounted to the upper surface of the bar. The plate projects outward over one of the side surfaces. The pin registration bar has a pair of sets of pins. The first set of pins projects upward from the other parallel surface of the plate for aligning with holes in the image film. The second set of pins projects downward from the one of the parallel surfaces of the plate for aligning with openings carried by the screen printing frame.

Abstract: The invention relates to an apparatus for positioning flexible printing plates comprising at least two markings on a printing cylinder, a support device for the printing cylinder, a projection device for projecting reference marks on the printing cylinder at a location where the markings will have to come, a display device for displaying the markings and the reference markings, and a positioning table extending substantially horizontal for locating the printing plate to be positioned.

Abstract: Apparatus for providing a movable upright registration pin extending above a horizontal work surface for locating workpieces on the tooling plate of a computer controlled drilling machine. A straight edge member, disposed in a channel in the surface of the tooling plate, provides two vertical reference surfaces which are precisely located to define a line of position for the registration pin. The registration pin is maintained upright in a carrier that is slidably disposed in a channel in the straight edge member between the two reference surfaces. The rotation of a cam bar disposed adjacent the carrier applies force to the carrier which causes the registration pin to bear against the two vertical reference surfaces to precisely and securely locate the pin on the line of position. The registration pin may be pushed by the spindle of the drilling machine along the line of position and then locked in the registration position under the automatic control of the drilling machine.

Abstract: A mechanism is described for adjusting the skew angle of inclination of a printing plate engaging the periphery of a plate cylinder, by means of a lever system which adjusts the edges of the printing plate in opposite directions. For this purpose, the two clamping bars are provided on a common baseplate which is lifted at one end prior to releasing the printing plate.

Abstract: A printing plate making apparatus for color printing is provided with a depicting section for recording an image on the surface of a printing plate, a processing section for processing the printing plate, with a processing solution, while conveying the printing plate, and a punching section for punching notches for positioning and winding the printing plate around a plate cylinder of a rotary press, the depicting and punching sections are provided with a first reference pin for abutting against a side edge of the printing plate being moved in a first direction to position the printing plate in the first direction, and a second reference pin for abutting against a side edge of the printing plate being moved in a second direction to position the printing plate in the second direction. The positional relation between the first and second reference pins in the depicting section and the positional relation between the first and second reference pins in the punching section are set identically.

Abstract: An apparatus and method are provided for registration of screens used in ink transfer processes for the printing of patterns on substrates such as clothing and other articles. The apparatus includes a platen surface and registration members that are mounted for movement toward and away from opposite sides of the platen. A pair of the registration members are coupled so that they move in mirror image in relation to a fixed point on the platen. When the screen frame is positioned on the platen, the registration members are activated to move inwardly toward the fixed point on the platen to center the screen in relation to the fixed point. Artwork is applied to the screen in alignment with underlying indicia provided on the platen and the screen is then processed to form a stencil in the screen.

Abstract: Disclosed is an apparatus for a printing press, with means being provided in the press for correcting any out-of-register position of a printing plate, so as to release, after the printing plate has been clamped onto the plate cylinder, initially the tension of a rear tensioning strip, whereupon a forward tensioning strip is canted by a desired degree. Then, rear stops are moved back and the rear tensioning strip is tensioned by way of spring force. The described steps are repeated if required. Means are also proposed to noticeably reduce the sliding friction between the plate cylinder and the printing plate.

Abstract: A draughting apparatus 10 comprising a plurality of substantially planar symbols elements 30 having raised outlines 50 for depicting predetermined symbols 32, a support panel means 12, 16, for supporting the symbols elements 30 in a generally planar layout, said symbols elements 30 being provided with symbol element locating means 34, 16, and symbol transfer means comprising a self-duplicating set of sheets 36 of draughting material having at least two sheets 36, and a pressure transfer means 24, said at least two sheets 36, being disposable between said raised outlines 50 of said symbols elements 30 and said pressure transfer means 24 so that pressure applied by said pressure transfer means 24 causes the outline of said symbols 32 to be transferred to at least one of said two sheets 36 to create an image of said symbols outlines thereon.

Abstract: An apparatus for the mounting of a flexible printing plate (2) on a plate cylinder (1) comprises optical spotting devices (6) arranged to read register marks (5, 5') on the printing plate outside the printing plate picture (3).The printing plate (2) is secured and positioned in correct alignment in plane state on a not-shown two-part table before the mounting, after which the table is fed (20) towards the cylinder (1) until the printing plate adheres to the cylinder along a head line vertically above the cylinder axis, after which the two parts of the table are removed to each their sides of the cylinder and the printing plate is folded around the cylinder.

Abstract: Apparatus for providing a movable upright registration pin extending above a horizontal work surface for locating workpieces on the tooling plate of a computer controlled drilling machine. A straight edge member, disposed in a channel in the surface of the tooling plate, provides two vertical reference surfaces which are precisely located to define a line of position for the registration pin. The registration pin is maintained upright in a carrier that is slidably disposed in a channel in the straight edge member between the two reference surfaces. The rotation of a cam bar disposed adjacent the carrier applies force to the carrier which causes the registration pin to bear against the two vertical reference surfaces to precisely and securely locate the pin on the line of position. The registration pin may be pushed by the spindle of the drilling machine along the line of position and then locked in the registration position under the automatic control of the drilling machine.