摘要:
A packing sleeve including an outer lateral surface for a printing unit cylinder of an offset printing press is disclosed, wherein the outer lateral surface has at least one region with an area containing a number of incisions, which increase the elasticity of the packing sleeve in the peripheral direction. The packing sleeve according to the invention can advantageously be used to enlarge the effective outer diameter of a printing unit cylinder in an offset printing press by drawing the packing sleeve over the printing unit cylinder in the offset printing press.
摘要:
A device for actuating a tensioning device for fastening flexible packings to printing-unit cylinders of rotary printing machines, the actuating device having a tensioning shaft for accommodating respective ends of flexible packings, for clamping at least one end of the flexible packings, and an actuating mechanism arranged outside the printing-unit cylinder for activating the tensioning shaft, includes an actuating element passing through a cylinder journal of the printing-unit cylinder and being displaceable axially relative to the cylinder journal, and a transmission element via which the displacement of the actuating element is convertible into a rotational movement of an attachment to the tensioning shaft; and a printing unit and a printing-unit cylinder having the actuating device, as well as a method of operating a tensioning device for fastening flexible packings.
摘要:
This format adaptation sleeve for a rotary press comprises an outer surface. In the non-mounted state, the outer surface of the adaptation sleeve is frustoconical.
摘要:
A printing unit for printing a web of paper is provided. The printing unit includes a frame and at least a first and a second printing group, each printing group including a blanket cylinder and a plate cylinder. The printing unit also includes a cylinder support and movement mechanism, at least one throw-on configuration in which the blanket cylinders are pressed against each other and against the plate cylinders, and at least one throw-off configuration in which the blanket cylinders are spaced apart from each other. The support and movement mechanism includes at least one connection which connects the plate cylinder and the blanket cylinder of at least one printing group. The connection includes a region of lesser strength which is intended to break under a predetermined force.
摘要:
This format adaptation sleeve for a rotary press comprises an outer surface. In the non-mounted state, the outer surface of the adaptation sleeve is frustoconical.
摘要:
A fountain for a dampening unit of an offset printing machine includes a container having an inlet for dampening solution and a return for the dampening solution. The container is formed with a base, at least one side wall connected to the base and a dam disposed on the base. The dam is formed with an upper edge that is lower than an upper edge formed on the one side wall. A dividing wall has a run-off edge and an infeed edge. The dividing wall is seated on the upper edge of the dam and, starting from the dam, extends over the base to as far as the infeed edge. The infeed edge defines the level of the dampening solution in the fountain.
摘要:
A printing unit for printing a web of paper is provided. The printing unit includes a frame and at least a first and a second printing group, each printing group including a blanket cylinder and a plate cylinder. The printing unit also includes a cylinder support and movement mechanism, at least one throw-on configuration in which the blanket cylinders are pressed against each other and against the plate cylinders, and at least one throw-off configuration in which the blanket cylinders are spaced apart from each other. The support and movement mechanism includes at least one connection which connects the plate cylinder and the blanket cylinder of at least one printing group. The connection includes a region of lesser strength which is intended to break under a predetermined force.
摘要:
Device for exchanging printing forms on a form cylinder in a printing unit of a rotary printing press, a holding device being provided in the printing unit for both holding therein at least one printing form which is to be installed, as well as at least one printing form which is being removed, includes profile members for guiding the printing forms substantially by lateral regions thereof.
摘要:
Device for connecting retaining elements and a crosspiece on a printing-form cylinder of a rotary printing press for fixing a flexible printing form to the circumference of the printing-form cylinder, a front edge of the flexible printing form being able to straddle a front edge of a gap formed in the cylinder, and a rear edge of the flexible printing form being fixable by at least one resilient retaining element mountable actuatably on the crosspiece and having a hook-shaped projection at an end thereof directed towards the circumferential surface of the printing form, includes a plurality of the retaining elements mountable alongside one another, and stop elements for form-lockingly locking the retaining elements on the crosspiece.
摘要:
Device for changing printing forms on a printing-press form cylinder having a gap formed therein containing a holding device associated with a printing start, the holding device having a gripping region openable so as to form a gap extending over a printing-form format width for taking up a leading edge of a printing form therein, includes a swivelable holding element for selectively removing a first printing form from the form cylinder and applying a second printing form onto the form cylinder.