Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention provides a unit for printing a web of paper including 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 including a throw off mechanism for supporting and moving the cylinders, into at least one throw-on configuration, in which the blanket cylinders are pressed against each other and against the plate cylinders, and a throw-off configuration, in which the blanket cylinders are spaced apart from each other and from the plate cylinders. The throw-off mechanism includes at least a first system for returning the mass of at least a first cylinder of the first printing group towards a first cylinder of the second printing group and vice-versa so that the first cylinders form mutual counterweights when the printing unit moves between the throw-on and throw-off configurations thereof.

Abstract: 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.

Abstract: 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.

Abstract: The invention provides a unit for printing a web of paper including 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 including a throw off mechanism for supporting and moving the cylinders, into at least one throw-on configuration, in which the blanket cylinders are pressed against each other and against the plate cylinders, and a throw-off configuration, in which the blanket cylinders are spaced apart from each other and from the plate cylinders. The throw-off mechanism includes at least a first system for returning the mass of at least a first cylinder of the first printing group towards a first cylinder of the second printing group and vice-versa so that the first cylinders form mutual counterweights when the printing unit moves between the throw-on and throw-off configurations thereof.

Abstract: 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.

Abstract: 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.

Abstract: A device for receiving an ink supply in an ink feed device in an inking unit of a printing machine, the ink supply being received in a reservoir having elements formed with laterally bounding surfaces, and contact surfaces for sealing off the ink supply with respect to a rotating surface, comprising unipartite side parts, respectively, constituting the elements formed with the bounding surfaces and the contact surfaces, the contact surfaces being engageable with respective contact areas on an ink-fountain roller formed with the rotating surface, the side parts having lip-shaped sealing elements bearing resiliently on the ink-fountain roller.

Abstract: A device for holding an ink supply in an ink-feeding device in an inking unit of a printing machine, the ink supply being received in a reservoir defined by lateral surfaces having contact surfaces for sealing off the ink supply with respect to a rotating surface, comprising a resilient element for sealing off a gap, the resilient element being received in respective side parts of an ink-feeding device, and setting elements for applying a setting force to the side parts; and an ink duct; an inking unit; and a printing unit, respectively, including the device.

Abstract: 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.

Abstract: A device for receiving an ink supply in an ink feed device in an inking unit of a printing machine, the ink supply being received in a reservoir having elements formed with laterally bounding surfaces, and contact surfaces for sealing off the ink supply with respect to a rotating surface, comprising unipartite side parts, respectively, constituting the elements formed with the bounding surfaces and the contact surfaces, the contact surfaces being engageable with respective contact areas on an ink-fountain roller formed with the rotating surface, the side parts having lip-shaped sealing elements bearing resiliently on the ink-fountain roller.

Abstract: A device for changing printing forms on form cylinders of rotary printing machines, having a pivotable surface for guiding the printing forms to be changed, the printing forms being grippable at an underside thereof, includes a pivotable printing-form table to which a separately actuatable contact member is assigned, the contact member being throwable onto a surface of a printing form disposed on the printing-form table for positioning the printing form in any selective position, a method for changing printing forms, and a printing unit including the changing device.

Abstract: 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.

Abstract: A device for securing printing forms on the circumference of a printing form cylinder, wherein a leading edge and a trailing edge of a printing form are receivable in a gap formed in the printing form cylinder and, in a clamped or locked-up state of the printing form, engage respective side faces defining the gap, including a rotatable cross-bar received in the gap, and a clamping element for acting upon one of the edges of the printing form, the clamping element being secured to the cross-bar, further includes a protrusion formed on a side wall having one of the faces defining the gap of the printing form cylinder, the clamping element being cooperable with the protrusion for clamping a printing form edge in a tangential direction to the printing form cylinder during a clamping or locking process.

Abstract: 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.

Abstract: 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.

Abstract: Device for fixing a flexible printing form on a form cylinder of a printing press, the form cylinder having at least one axially extending slit formed therein, and at least one leaf-shaped element disposed in the slit, the leaf-shaped element having a rounded end portion for securing a bent portion of a flexible form, includes a tubular support wherein the leaf-shaped element is disposed so as to form a fastening element, the tubular support accommodating an actuating member capable of resiliently deforming the fastening element.

Abstract: Device for cleaning cylinder bearers of rotary printing-unit cylinders having cylinder bearers mounted at respective end faces of at least two of the cylinders for attaining a defined spacing between respective axes of the two cylinders, the cylinder bearers being rotatable with the two cylinders, respectively, and being rollable on one another while being in continuous contact with one another, includes at least one cleaning element movable into engagement with a bearing surface of one of the cylinder bearers, respectively, by a pressure medium, and movable away from the bearing surface, the cleaning element being impregnatable with a fluid.