摘要:
Sheet delivery of a printing machine having a gripper system running on an endless conveyor includes air containers located adjacent the endless conveyor and being formed with a sheet-wide field of air-outlet openings, the gripper system including grippers for gripping a sheet of printing material at a leading edge thereof so that the sheet is floatingly conveyable by the endless conveyor over the sheet-wide field of air-outlet openings formed in the air containers, the endless conveyor having a capability of turning the sheet and depositing it on a sheet pile, at least one of the air containers extending over the sheet width and having air-outlet openings of varying shapes formed so that air is discharged therefrom in different directions, the one air container being chargeable with blowing air regulatable in accordance with specific requirements of the printing material of the sheet.
摘要:
An apparatus for adjusting the position of a cylindrical image carrier relative to a scanning head is designed to cheaply and easily permit substantially reliable positioning. In the apparatus for adjusting the position of a cylindrical image carrier relative to a scanning head, in which apparatus the image carrier is mounted so as to be rotatable around its longitudinal axis, the image carrier can be swiveled around an axis perpendicular to the longitudinal axis. The invention can be applied to devices that generate images and to devices that reproduce images, in particular for the production of type forms and for the scanning of originals.
摘要:
A method of treating a process-free printing form fitted to a printing-form cylinder includes having an imaging unit act upon a coating of a printing form and produce printing areas and non-printing areas on the printing form, and after the imaging unit has acted upon the coating, operating the imaging unit at reduced power during a return pass into a starting position thereof.
摘要:
A printing-unit accessory engaged with a printing unit of a printing press, in an operating position of the accessory, and removed from the vicinity of the printing unit, in at least one maintenance position of the accessory, includes a pivoting mechanism securing the accessory to the printing press, the pivoting mechanism being disposed in a region of a side wall of the printing unit in a manner that the accessory is movable into a vertical position adjacent the side wall, and at least one linear guide disposed in front of the side wall so that the accessory is displaceable into a horizontal position thereof distal from the printing unit.
摘要:
An unwinding apparatus supports a reel (60) of web material (22) which is to be unwound and directed into a printing unit (14) having a front/operator side and a rear/gear side. The unwinding apparatus comprises a frame (16) including a rear side part (28) located at the rear side of the printing press (14), and front side parts (24, 26) located at the front side of the printing press (14). The front side parts (24, 26) define an opening in the frame (16). Guide and locating bars (38) on the frame (16) extend from the rear side part (28) to the front side parts (24, 16) of the frame (16). The apparatus further comprises a movable reel cartridge (18) having front and rear cartridge frame parts (64, 66) for supporting the reel (60) of web material (22). The reel cartridge (18) is movable through the opening in the frame (16) and onto the guide and locating bars (38) to locate the reel (60) in its operating position.
摘要:
A method for exposing a printing form includes providing a plurality of exposure channels disposed in a two-dimensional array, and inputting energy, by the exposure channels of a column of the array, for an image element on the printing form. Further included are steps for activating a first row of the array of exposure channels for producing a first component of the input of energy assigned to each column of the array in one row of image elements, moving the printing form relative to the exposure channels, and activating a second row of the array of exposure channels for producing a second component of the input of energy assigned to each column of the array when a point of projection of the exposure channel of a second row of the array comes to lie on the image element of the row already exposed by the exposure channel of the first row and the same column. A device for implementing the method and a printing unit and a printing press including the device are also provided.
摘要:
An inking unit for a printing machine, which includes at least one ink roller rolling on a plate cylinder of the printing machine, an ink jet printing apparatus with a plurality of ink jets that can be controlled selectively, and an ink transfer device with a rotating mantle surface for transferring printing ink from the ink jet printing apparatus to the at least one ink roller. A compact and stencil-free inking unit for high-quality printing is achieved and the at least one ink roller and the ink transfer device, and have the same outside circumference as the plate cylinder.
摘要:
Device for wrapping a flexible print image carrier around a printing form cylinder installed in a printing press, having a rewinding mechanism including a first winding spool for unwinding a print image carrier which is windable onto an outer cylindrical surface of the printing form cylinder, and a second winding spool for winding up the print image carrier from the outer cylindrical surface of the printing form cylinder, both of the winding spools being jointly disposed in a cavity formed in the interior of the printing form cylinder, the cavity having a single opening thereto formed in the outer cylindrical surface of the printing form cylinder, the print image carrier being windable from the first winding spool through the single opening onto the outer cylindrical surface of the printing form cylinder and being windable from the outer cylindrical surface of the printing form cylinder through the single opening onto the second winding spool, includes a bearing member supporting the rewinding mechanism for the print image carrier, the bearing member being disposed in the interior of the printing form cylinder and being removable from the interior of the printing form cylinder while the printing form cylinder remains in installed position thereof in the printing press.
摘要:
Device for feeding single-sheet material to a cylinder accepting the single-sheet material, with feed channels to which, respectively, at least one friction-roller set is assigned, the friction-roller set being mounted so as to be adjustable between a press-on position and a lift-off position, and being insertable into the feed channels cyclically with a feeding of sheet material, includes at least one swivelable transport member disposed adjacent the feed channels and, located at the feed channels downstream from the swivelable transport member, as viewed in sheet transport direction, sheet-guiding elements for maximizing accuracy of the feeding of the sheet material into sheet-holding elements of a sheet-guiding cylinder.
摘要:
Printing device for holding a printing master without slippage on an outer cylindrical surface of a form cylinder having, in the interior thereof, a first reel for unwinding a printing master which is mountable on the outer cylindrical surface of the form cylinder, and a second reel for rewinding a printing master which has been mounted on the outer cylindrical surface, the form cylinder being formed with a single opening leading to a cavity provided in the interior thereof, the first and the second reels being disposed in common within the cavity, the printing master being windable from the first reel within the cavity onto the outer cylindrical surface and from the outer cylindrical surface onto the second reel within the cavity, the printing master being movable circumferentially to the outer cylindrical surface, includes a removable form-locking connection between a surface provided on the form cylinder and the tangentially movable printing master for restraining movement of the printing master in one direction.