Abstract:
Variable format offset printing machine having a central impression cylinder The printing machine comprises a central impression cylinder (1 ) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1 ). Each printing station comprises a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). Said blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdraw positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of said printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) comprised in an inclined first plane (P1 ) which does not comprise the axis of the central impression cylinder (1 ) at any of said multiple working positions for different diameters of the blanket and plate cylinders (2, 3).
Abstract:
A web printing press and method is provided which includes a first satellite print unit (20) printing a first web (12) on a first web first side, a second satellite pπnt unit (22) printing a second web (14) on a second web first side and a first dryer (60) downstream of the first and second satellite print units, the first and second webs passing through the first dryer A third satellite print unit (24) prints the first web (12) on a first web second side downstream of the first dryer, and a fourth satellite print unit (26) prints the second web (14) on a second web second side downstream of the first dryer.
Abstract:
According to the invention, the space between two five-cylinder printing units (01,03,06,08 or 02/04/07/09) in an offset printing machine may be modified.
Abstract:
The invention relates to a method and device for driving a printing press with at least one integrated imaging device. The aim of the invention is to provide a method and a device enabling higher imaging speed and therefore minimizing the time required for image formation. According to the invention, this is achieved by detaching the drive mechanism of the printing form cylinder (10) from the drive wheel train, by driving the printing form cylinder (10) with a drive mechanism of its own during imaging at imaging speed and by integrating the drive mechanism of the printing form cylinder (10) in the drive wheel train in an operating phase position.
Abstract:
The invention relates to a printing machine with at least one integrated device to print a printed form from a printing cylinder. The aim of the invention is to create a printing machine with a compact design. This is achieved by arranging the cylinder groups (11) symmetrically in relation to a horizontal alpha bisecting line (12) of an angle ( alpha ) formed by the connecting lines of the centers of the offset cylinders (9) with the center of the printing cylinder (13).
Abstract:
The invention relates to a printing unit (16; 17) comprising several printing groups (03; 04; 21; 22; 28; 29; 31; 32), each of which is provided with at least one plate cylinder (07) and at least one transfer cylinder (06) that is arranged so as to cooperate directly with the plate cylinder (07). The printing unit (16; 17), which is embodied as a nine-cylinder satellite printing unit (16; 17), is equipped with four plate cylinders (07) and a counterpressure cylinder (18) that is configured as a satellite cylinder (18). At least one inking roller of an inking group (09) is disposed so as to cooperate directly with the plate cylinder (07). One respective plate replacing mechanism (11; 11a; 11b), which encompasses a front section facing the associated plate cylinder (07), is assigned to at least two plate cylinders (07) that are placed next to each other in a horizontal direction.
Abstract:
The invention relates to a printing unit (01, 46) comprising a pair (02) of cylinders made up of a form cylinder (03) and a transfer cylinder (04), in addition to a third cylinder (08, 09), which forms a printing site (11) with the transfer cylinder (04). The form cylinder (03) and the transfer cylinder (04) are coupled together in a fixed manner, forming a drive system (23, 58), which is driven by a common drive motor (06) during the printing process. Power is transmitted from the transfer cylinder (04) of the pair (02) to the form cylinder (03) of the pair (02). The drive system (23) of the pair (02) and the drive of the third cylinder (08, 09) are coupled to one another in a mechanical manner by means of a coupling (12), so that they can be selectively coupled or decoupled.
Abstract:
The invention relates to a printing unit comprising at least three rotating members (01, 09, 24), namely an impression cylinder (24), a forme cylinder (01, 09) that cooperates in the printing position, and a roller (04) that cooperates with said forme cylinder. The two cylinders and the roller may optionally have zero rotational speed (NFZ, NSZ, NW) or a production rotational speed (PFZ, PSZ, PW). At least two of the rotating members have a set-up rotational speed (RFZ, RSZ, RW) that is different from the respective production rotational speed and from the zero rotational speed.
Abstract:
A printing unit has at least five cylinders of at least one printer. At least two of these cylinders rotate independently of each other, while at least one of the cylinders has a rotational speed that is different from the rotational speed zero and from a production rotational speed.
Abstract:
The invention relates to a printer comprising multiple printing groups (01-04;06-09), which is mounted in the frame of an offset printing machine. The printing groups are each equipped with at least one printing cylinder (11), at least one transfer cylinder (12) and at least one inking system (13), two of these printing groups being arranged opposite each other. At least one counter-pressure cylinder (16-19) is located between said opposite printing groups. This counter-pressure cylinder can interact with at least one transfer cylinder for printing a line of material. The frame has at least three separable frame modules (21-23). The printing cylinder, transfer cylinder and inking system of at least one left printing group (5) are located in a left frame module (21), while the printing cylinder, transfer cylinder and inking system of at least one right printing group are located in a right frame module (23), with at least one counter-pressure cylinder being located in a middle frame module (22).