摘要:
A cylinder in equipment for making printing plates is provided which allows exposure of a cylinder that is mounted on both sides to be detached at a point of separation on a via side opposite its drive, a journal can be detached. The cylinder is driven by a blocking device capable of being fitted to a screw element which screws the journal to the cylinder and vice versa.
摘要:
An apparatus constructed which accurately guides and adjusts a cylinder axially in a rotary printing machine. For this purpose, an electromagnetic system, with which an axial force can be applied to the cylinder, is arranged on the frame of the rotary printing machine. The cylinder is mounted in mountings that permit axial displacement.
摘要:
In order to expose a cylinder mounted at both sides in side walls on its side opposite its drive, a structural unit can be moved away from the cylinder at a separation point thereof. The cylinder is driven and a jamming device is attached to a screwed element which screws the structural unit to the cylinder.
摘要:
A printing unit for a web-fed rotary printing machine is provided including a plurality of cylinders; a corresponding drive motor for each of the cylinders; a machine frame includes at least one load bearing wall, including two mutually facing wall surfaces perpendicular to a plane through end faces of the cylinders, wherein the at least one load bearing wall is arranged laterally beside an end of the cylinders; a guide means including a plurality of guide elements arranged on the at least one load bearing wall; a plurality of carriages, wherein each carriage is operably attached to at least one of the plurality of guide elements; at least one driven screw spindle mounted on the machine frame; and a permanently threaded nut engaged by an associated driven screw spindle for setting the location of the carriages.
摘要:
In the installation and removal of a cylinder of a printing machine, in which the cylinder has a middle drum and two lateral bearing, stubs which are capable of being secured releasably to the drum and of being connected to one another by means of a central spindle which passes through the drum and which at least at one end, can be screwed, by means of a screw connection provided within the outer circumference of the spindle, to the adjacent bearing stub which, with the screw connection released, can be removed, together with its bearing housing, at least to all extent such that the drum is accessible from the side, a high degree of safety and a time saving can be achieved in that, for the change, the drum of a cylinder is released from the bearing stubs and one bearing stub is removed, after which the consequently exposed end of the spindle of the cylinder has connected to it, in the same way as the removable bearing stub, a spindle extension, onto which the drum is pushed and which is then released from the spindle and moved away together with the drum, and vice versa.
摘要:
A printing unit for a web fed rotary printing machine is provided including a machine frame support, two sets of printing unit cylinders, carriages, drive motors and guide elements. The two sets of printing unit cylinders, include a plurality of outer printing unit cylinders and a plurality of inner printing unit cylinders. Each carriage corresponds to one printing unit cylinder for rotatably mounting its corresponding printing unit cylinder on the machine frame support. There is a drive motor for each carriage. Two sets of guide elements are arranged on the machine frame for determining a travel setting of the plurality of carriages along the machine frame support. The guide elements for the outer cylinders are arranged on the frame support in an orientation different than the guide elements for the inner cylinders so that movement of the outer printing unit cylinders is in a different direction than movement of the inner printing unit cylinders. Optionally, the printing unit accommodates additional printing devices that are moveable in relation to their corresponding cylinders and vice versa.
摘要:
A process for producing a printing form on a form cylinder, which process operates reliably even in the case of large form cylinders and high laser powers, contains the process steps of drawing a blown film tube onto the form cylinder, transferring surface elements of the tubular film, in accordance with an image, as a result of heating by a laser beam, and removing the blown film tube from the form cylinder.
摘要:
In an apparatus for producing a printing image on a printing medium held by a cylinder (1) by a laser, the laser writing head (7) of which is positioned on a crossmember (3) so as to be displaceable parallel to the axis of the cylinder (1), a space-saving functionally reliable embodiment is attained by the fact that a protective switch (10) which detects the presence of a cylinder (1) is provided fixedly on the crossmember (3) and the crossmember (3) bears switching strips (5, 6) which expose a laser writing head displacement region (b) between them having the width of the printing image (8) and interact with a further protective switch (11) attached to the laser writing head (7) for switching off the laser when it is situated outside the laser writing head displacement region (b).
摘要:
An apparatus for transporting printing sleeves is provided. The transport apparatus includes a housing with a bottom wall, a plurality of side walls, and at least one cover. A plurality of reception devices are mounted in the housing. Each reception device receives a printing sleeve in a vertically oriented transport position with a longitudinal mid-axes of the respective printing sleeve extending vertically. Each reception device is movable out of the housing into an outside position when the at least one cover of the housing is open. Each reception device is pivotable in the outside position such that the corresponding printing sleeve can be moved out of the vertical transport position into a horizontal extraction or insertion position.
摘要:
A rotary printing machine having a plurality of printing-unit cylinders mounted one above another on a side wall, their axes lying in a plane inclined with respect to the plane of the printing-material web. An image-setting device is arranged wholly within the range of the obtuse angle which is formed by the plane of inclination of the cylinders and the plane of the printing-material web.