Abstract:
A method for handling printing plates includes moving the printing plates from a first process station to a second station by a printing plate holder. The process stations are all arranged on a cylinder circumferential surface around a mid-axis, and it is possible for all to be opened out by the printing plate holder in the same way as with a distributor for the purpose of input or output. An apparatus for handling printing plates has a printing plate holder containing at least two mutually parallel, intercoupled holding decks for printing plates which can be pivoted about a common axis of rotation. The holder is located in the vicinity of the process stations and is suitable for transporting a printing plate from a first process station to a second station. Therefore, different types of printing plate can be handled manually, automatically or partly automatically in a less complex structure.
Abstract:
A method for handling printing plates includes moving the printing plates from a first process station to a second station by a printing plate holder. The process stations are all arranged on a cylinder circumferential surface around a mid-axis, and it is possible for all to be opened out by the printing plate holder in the same way as with a distributor for the purpose of input or output. An apparatus for handling printing plates has a printing plate holder containing at least two mutually parallel, intercoupled holding decks for printing plates which can be pivoted about a common axis of rotation. The holder is located in the vicinity of the process stations and is suitable for transporting a printing plate from a first process station to a second station. Therefore, different types of printing plate can be handled manually, automatically or partly automatically in a less complex structure.
Abstract:
The invention includes a method and a device for transferring storage containers, especially cassettes for printing plates, in order to reliably and accurately receive both manually inserted cassettes and cassettes from upstream transport systems and upstream storage devices, such as MCLs. The invention enables these cassettes to be supplied to other devices constructed, for example, for separating printing plates. The storage containers are aligned in a holder provided for them, and are positioned and secured against inadvertent withdrawal. In this case, the transport of the storage containers within the device is carried out in a damped manner and can be assisted automatically. A pneumatic drive system is preferably used for this purpose.
Abstract:
A method for handling printing plates includes moving the printing plates from a first process station to a second station by a printing plate holder. The process stations are all arranged on a cylinder circumferential surface around a mid-axis, and it is possible for all to be opened out by the printing plate holder in the same way as with a distributor for the purpose of input or output. An apparatus for handling printing plates has a printing plate holder containing at least two mutually parallel, intercoupled holding decks for printing plates which can be pivoted about a common axis of rotation. The holder is located in the vicinity of the process stations and is suitable for transporting a printing plate from a first process station to a second station. Therefore, different types of printing plate can be handled manually, automatically or partly automatically in a less complex structure.
Abstract:
In the field of electronic reproduction technology, an apparatus for clamping and holding a printing plate on the surface of an exposure drum in a printing plate exposer includes a clamping apparatus for the front edge of the printing plate. The clamping apparatus has actuating elements that are accommodated in the interior of the exposure drum. Only the clamping bars that clamp the printing plate fixedly protrude slightly beyond the drum surface. Terminating elements are provided for holding the rear edge of the printing plate, which terminating elements can be displaced in the suction grooves of the drum surface and primarily restrict the vacuum that draws the printing plate onto the drum surface to the surface below the printing plate. Additionally, the terminating elements are provided with a roof element that protrudes beyond the rear edge of the printing plate and, thus, encloses the rear edge in the gap between the roof element and the exposure drum without, however, clamping it fixedly. Accordingly, devices for locking the terminating elements in their circumferential position are not required.
Abstract:
An apparatus and method for automatically clamping film material onto the recording drum of a reproduction device and for releasing the film material exposed by a recording element from the recording drum. The apparatus has a roll film cassette introducible into a light tight portion of the reproduction device. Conveyor and guide surfaces are provided between the roll film cassette and the recording drum. Film conveying means is provided for conveying the film web situated in the roll film cassette to the recording drum. A film cutting means is provided for the separation of film sheets. A film length measuring means, a pressure means having a lowerable pressure roller for the film sheets, a positioning drive for turning the recording drum into a start of clamping, start of exposure and start of release position, and a lift-off means having a lowerable lift-off finger for peeling the exposed film sheets from the recording drum are all provided. The film sheets are fixed on the recording drum by vacuum. Large-area film material from a roll film cassette can be clamped onto the recording drum with this apparatus without the formation of folds and without warping.
Abstract:
A method and an apparatus for controlling the vacuum distribution in an exposer for recording printing originals. The recording material for the printing originals is held firmly on a supporting surface by negative pressure. The recording material being attracted by suction by a vacuum pump via suction grooves machined into the supporting surface and via suction ducts connected to the suction grooves. For opening and closing the suction ducts, valves are provided, the valves being closed by the mechanical action of force from an actuator on a piston rod and opened by the action of compressed air on a piston in the valve. For opening the valve, an outlet opening for the compressed air is integrated into the actuator. In a printing plate exposer with an exposure drum, the suction ducts and the valves are located in the exposure drum, and the actuator is located outside the exposure drum.
Abstract:
A method and an apparatus for controlling the vacuum distribution in an exposer for recording printing originals. The recording material for the printing originals is held firmly on a supporting surface by negative pressure. The recording material being attracted by suction by a vacuum pump via suction grooves machined into the supporting surface and via suction ducts connected to the suction grooves. For opening and closing the suction ducts, valves are provided, the valves being closed by the mechanical action of force from an actuator on a piston rod and opened by the action of compressed air on a piston in the valve. For opening the valve, an outlet opening for the compressed air is integrated into the actuator. In a printing plate exposer with an exposure drum, the suction ducts and the valves are located in the exposure drum, and the actuator is located outside the exposure drum.
Abstract:
A method of and an apparatus for handling an exposure surface to be exposed includes the steps of hanging the exposure surface in a transitional state during introduction into the exposure region of an exposure unit and/or during discharge from an exposure unit. The exposure surface is transferred from an approximately horizontal orientation in a feed region or loading region into a hanging orientation and/or is lowered for introduction into the exposure unit. The exposure surface to be exposed is, in particular, a printing plate. The exposure unit is, preferably, a printing plate exposer, and is, in particular, an inner-drum printing plate exposer.
Abstract:
The invention is directed to a device for automatically clamping and releasing film material onto or, respectively, from the recording drum of a reproduction device with vacuum suctioning. The device is composed of a roll film cassette, of a conveying and guide surface, of a film cutting means, of a film length measuring means, of a pressure means having a pressure roller, of a lift-off means having lift-off finger, as well as drives for turning the recording drum and for conveying the film material to the recording drum. The recording drum comprises axially proceeding suction hole rows for suctioning the film material by vacuum. A vacuum distributor controllable by the rotational motion is arranged in the recording drum, this vacuum distributor successively connecting the individual suction hole rows to the stationary vacuum pump during clamping, so that the suction hole rows are charged with vacuum step-by-step with increasing wrap of the recording drum by the film material. Film material of different formats, particularly large formats, can be automatically clamped without the formation of folds and warping with the device and can be reliably fixed on the recording drum during the exposure.