摘要:
The invention is about a convenient way of fixing a sleeve over a mandrel in a press. The sleeve is attached by applying a hydraulic pressure into the mandrel which deforms itself and grips on the sleeve. The pressure is brought by a piston mounted on a screw inside the mandrel, which when tightened increases the pressure and grips the sleeve.
摘要:
Provided is an activation device for a printing blanket and a printing method using a printing blanket that enable a surface of an absorber to be constantly kept clean to enable proper activation of a surface of the printing blanket. The activation device for a printing blanket includes a storage tank having a box shape, the absorber mounted on the storage tank, and a liquid stored in the storage tank. The absorber includes layers of absorbing members and absorbs the liquid from an absorber lower part, and an uppermost layer of the absorber is peelable from the absorber.
摘要:
A device for printing hollow bodies includes a segmented wheel which can be rotated about a rotational axis. The segmented wheel has multiple segments, one behind the other, on the segmented wheel circumference, each for receiving a respective printing blanket. At least one of the printing blankets, which is arranged on one of the segments, is arranged on the hollow body to be printed in a rolling manner or at least in a rollable manner. Each of the printing blankets is arranged on a plate-shaped metal support. Each plate-shaped metal support is configured to be bendable and forms a metal printing blanket, together with the printing blanket arranged on the support. Each metal printing blanket formed by the respective support, together with the printing blanket arranged on the support, is arranged or can at least be arranged on one of the segments of the segmented wheel in a replaceable manner as a whole. Each support, which is arranged on one of the segments of the segmented wheel, of the corresponding metal printing blanket, is held on the support in one of a form-fitting and a force-fitting manner.
摘要:
A mandrel for use in a printing apparatus includes a substantially cylindrical mandrel shaft and plastic expansion rings that are slidably and coaxially mounted on the mandrel shaft. The mandrel also includes a locking assembly including a fixed stop ring and a single locking ring that is axially movably mounted on the mandrel shaft. The expansion rings are positioned between the stop ring and the locking ring. In the unlocked position of the locking ring the expansion rings are in a released state in which the axial compression and the radial expansion of the expansion rings are smaller than in a locked position of the locking ring. A printing cylinder sleeve can be fixedly connected to the mandrel by bringing the expansion rings in the radially expanded state. When the printing cylinder sleeve has to be exchanged, this is feasible when the expansion rings are in the released state.
摘要:
A removable flexible jacket for use in a printing press having a transfer cylinder for transferring a freshly printed substrate comprises a sheet of woven fabric, a beaded film sheet coupled to the sheet of woven fabric, and an image disposed between the sheet of woven fabric and the beaded film sheet. The image is visible through the beaded film sheet, and wherein the image divides at least a portion of a surface of the beaded film sheet into a plurality of zones.
摘要:
In a printing press a method is provided. The method comprises coupling an adjustment tool to a transfer cylinder substantially parallel to an axis of the transfer cylinder and coupling a first end of a flexible jacket to a first attachment structure coupled to the transfer cylinder, wherein the first attachment structure is proximate to a first edge of the transfer cylinder. The method further comprises placing the jacket around the transfer cylinder and over the adjustment tool and coupling the second end of the jacket to a second attachment structure coupled to the transfer cylinder, wherein the second attachment structure is proximate to a second edge of the transfer cylinder and the jacket is attached without free play to the transfer cylinder. The method further comprises withdrawing the adjustment tool from between the transfer cylinder and the jacket, whereby an amount of free play of the flexible jacket remains.
摘要:
An image transfer sleeve (111) is designed to be removable fitted around a mandrel of an offset printing press and comprises a printing cylinder sleeve (110) and an image transfer blanket (100). The image transfer blanket. (100) Extends around the printing cylinder sleeve (110) and is connected to the printing cylinder sleeve (110) by means of adhesive force. Two opposite edges (102, 104) of the image transfer blanket (100) form a seam (113). The seam (113) is at least partially wavy. The image transfer blanket (100) is present along at least part of each describing line of the peripheral surface of the image transfer sleeve (111).
摘要:
A cylinder of a printing unit of a rotary offset printing machine has a periphery and an axial length. The peripheral surface of the cylinder is divided, in the axial length, into at least three sections that are positional next to one another. The peripheral surface has, in at least three sections, at least one slot-shaped opening. At least two of the sections each have two openings which are arranged offset with respect to each other about the periphery of the cylinder. The cylinder is intended for use in a cylinder pair including a 6/2 printing cylinder and an associated transfer cylinder.
摘要:
A sleeve-shaped printing element for mounting on a carrying cylinder in a printing unit of a web-processing rotary printing machine. The element includes a structure formed of material permitting radial expansion of the sleeve-shaped printing element, the carrying cylinder has an elongated axial extent and being formed with ducts for discharging an expansion medium. The ducts open on a circumferential surface of the carrying cylinder, and the expansion medium is pressurizable by a pressure source. The sleeve-shaped printing element is formed with an inner diameter increasing from one end to the other end of the printing element, and is formed with an at least approximately constant wall thickness; and a combination of the printing element and the carrying cylinder.
摘要:
A device is provided for securing at least one leading end and at least one trailing end of at least one packing on a cylinder of a rotary printing machine. The cylinder is provided with an axially extending channel. The leading end of the packing is bent at an acute angle and can fit into a nose configurement between the channel wall and the cylinder's peripheral surface. A securement element, that has a one-armed lever, is located in the channel and secures the trailing end by clamping it using a spring force. The channel has only one securing device in the peripheral direction.