摘要:
A method of operating a sheet-processing rotary printing press provided with a die cutting or punching unit and a delivery for forming processed sheets into a sheet pile or stack includes, in a first method step, moving the punching or die cutting unit, during production printing by the rotary printing press, from a first operating state of the unit wherein the sheets are punched or die cut, into a second operating state of the unit wherein the sheets are not punched or die cut as they pass the punching or die cutting unit, and after a given number of non-punched or non-die cut sheets have passed through the unit. In a second method step, the punching or die cutting unit is moved back into the first operating state thereof. The invention also includes a method of operating the printing press.
摘要:
To provide a synchronous control apparatus in a rotary press having a plurality of multicolor printing units to print the synchronous control apparatus including a printing image allocation setting section for allocating printing images which printing couples are to print, a drive unit for driving the printing couples, an inking transmission unit, a first moving unit for moving blanket cylinders of two sets of printing couples, a second moving unit for making it possible to supply ink, slave control sections for controlling rotation of the drive unit, a transmission unit related to the printing couples and inking devices, operation control sections for controlling operations of the first moving unit and second moving unit according to output signals of the slave control sections, and a master control section connected to the printing image allocation setting section and each of the slave control sections via a network.
摘要:
A method for driving a printing press includes driving, in a printing operation, via a gear train by at least a first motor, at least one drum for advancing printing material and a printing-form cylinder, processing angle-of-rotation signals of the drum in a control device for controlling the driving of the drum and the form cylinder, and driving, in a printing-form production operation in the printing press, a printing-form cylinder by a separate motor. The method further includes, in an operation for producing the printing form, synchronously actuating the first motor and the separate motor by providing a gear allocated to the driving of the printing-form cylinder, and an adjacent gear allocated to the driving of the drum of the gear train, the gears being disposed relative to one another at the most out of contact with one another, and at the least barely in engagement with one another so as to exert a slight pressure on one another, and a device for performing the method.
摘要:
A printing unit of an offset printing press utilizes a plurality of forme cylinders, transfer cylinders and at least two counter-pressure cylinders. In one mode of production all of the transfer cylinders engage one of the counter-pressure cylinders. In another mode of production two of the transfer cylinders cooperate with one of the counter-pressure cylinders and at least another one of the transfer cylinders cooperate with the other counter-pressure cylinder.
摘要:
A cylinder throwing-off/throwing-on controller for a multicolor lithographic rotary press in which paper splicing is performed. The cylinder throwing-off/throwing-in controller comprises a pulse generator for outputting a pulse signal every time the paper web travels a predetermined distance; a cylinder throwing-off timing adjustment unit including a counter and a setting device for setting a target count value in advance, the counter starting in response to the paper splicing signal, counting the pulse signal from the pulse generator, and outputting a cylinder throwing-off signal when the counted value reaches the target count value; a cylinder throwing-on timing adjustment unit provided for each of the printing units, the cylinder throwing-on timing adjustment unit starting in response to the cylinder throwing-off signal and outputting a cylinder throwing-on signal after elapse of a preset period of time; and a cylinder throwing-off/throwing-on mechanism for simultaneously moving the blanket cylinders of the plurality of printing units from the printing position to the non-printing position in response to the cylinder throwing-off signal and for sequentially moving the blanket cylinders of the plurality of printing units from the non-printing position to the printing position in response to the cylinder throwing-on signal, from the furthest-upstream printing unit toward the furthest-downstream printing unit.
摘要:
A printing unit of an offset printing press includes a first plate cylinder, a first blanket cylinder for selectively contacting the first plate cylinder, a first inker for inking the first plate cylinder, a second plate cylinder, a second blanket cylinder for selectively contacting the second plate cylinder, and a second inker for inking the second plate cylinder. A first inker drive gear connects to the first inker for driving the first inker, and a motor uniquely associated with the printing unit is configured to drive the first inker drive gear. In addition, a gear train engaging the first inker drive gear is driven by the first inker drive gear so as to drive the first plate cylinder, the first blanket cylinder, the second blanket cylinder, the second plate cylinder and the second inker.
摘要:
The present invention relates to a method and apparatus for preparing varying degrees of gloss on printed matter in printing machines producing printed images on printed matter by application of an ink layer. An object of the present invention is to provide a method for producing varying degrees of gloss on printed matter with only one coating tower which comprises only one coating unit and no especially manufactured coating plate. The method according to the present invention comprises applying an ink layer from at least two ink systems on a substrate to be printed to produce a printed image. The printed image is subsequently coated with a coating, whereby each ink system changes degree of gloss in reaction with the coating layer.
摘要:
A rotary offset printing machine uses a plurality of printing units placed inversely by 180° with respect to a vertical line with respect to each other. The drive assemblies for the cylinders of the inversely placed two printing units are also inversely disposed.
摘要:
A rotary printing unit consists of a pair of modules, each of which has two pairs of cooperating formed and transfer cylinders and a counter-pressure cylinder. A multi-variable cylinder arrangement is utilized. The counter-pressure cylinder in each of the five-cylinder modules can be placed on either side of a line extending between the axes of rotation of the transfer cylinders in the two pairs of cooperating formed cylinders and transfer cylinders in each module.
摘要:
An improved printing press includes a tubular-shaped printing blanket removably disposed on a blanket cylinder rotatably supported by a frame and having a continuous outer circumferential surface which is free of gaps. The printing blanket is disposed in rolling engagement with a conventional printing plate disposed on a plate cylinder having an axially extending gap in which opposite ends of the printing plate are secured. The printing blanket is removed by opening a portion of the frame and axially sliding the printing blanket off of the blanket cylinder. To assist in the removal or insertion of the printing blanket the blanket cylinder has passages which deliver a stream of air to the outer surface of the blanket cylinder which expands the inner circumferential surface of the printing blanket so that the blanket can be axially removed or inserted onto the blanket cylinder. The printing blanket has a metal inner surface which is tensioned by the blanket cylinder to retain the printing blanket on the blanket cylinder during operation of the press. The printing blanket is at least partially formed of a compressible material which is compressed by the plate cylinder at a nip between the plate and blanket cylinders.