US 11,312,125 B2 · Sheet-fed printing machine having a simultaneous printing unit for security printing

Abstract

A sheet-fed simultaneous printing machine has two directly interacting collecting cylinders with respective axes of rotation. An axial plane contains these axes of rotation. A reference plane contains such an axis of rotation of this type and has a horizontal surface normal. The intersection angle between the axial plane and the reference plane is max 0.5°. The sheet-fed simultaneous sheet printing unit has exactly four plate cylinders, of which two are arranged such that they directly interact with the first and two are arranged to such that they directly interact with the second collector cylinder. An inking unit with a respective ink supply is arranged in each plate cylinder and a supply sectional plane is determined for each ink supply, which intersects this ink supply and which also contains the axis of rotation of the corresponding plate cylinder. An intersection angle between the reference plane and a supply sectional plane of the respective ink supply is max 35°. A sheet-fed machine comprises at least one sheet-fed printing unit of this type, as well as a sheet-fed printing unit having two directly interacting impression cylinders. An intersection angle between the axial plane on one side and the reference plane on the other side is max 45°.

A sheet-fed printing unit (200), wherein the sheet-fed printing unit (200) is formed as a simultaneous sheet printing unit (200) and has a first cylinder (201) of a first type formed as a collecting cylinder (201) and has a second cylinder (202) of the first type formed as a collecting cylinder (202), which one of have direct contact with one another and are arranged to interact directly with one another and each of which have an axis of rotation (216;

217), and wherein each cylinder of the first type is engaged by at least one forme cylinder and wherein an axial plane (E1) is a plane (E1) containing both the axis of rotation (216) of the first cylinder (201) of the first type as well as the axis of rotation (217) of the second cylinder (202) of the first type, and wherein a reference plane (E2) is a plane (E2) containing at least one axis of rotation (216;
217) of such a cylinder (201;
202) of the first type and having a horizontal surface normal, and wherein these two cylinders (201;
202) of the first type are arranged, at least during a processing operation, such that an intersection angle between the axial plane (E1) and the reference plane (E2) is no more than 0.5°, and wherein at least one inking unit (227) is arranged for each forme cylinder (203;
204;
206;
207), which at least one inking unit for each forme cylinder has at least one respective ink reservoir (231), and wherein at least one reservoir sectional plane (S3) is established for each ink reservoir (231), said at least one reservoir sectional plane intersecting its ink reservoir (231) as well as containing the axis of rotation (222;
223;
224;
226) of the particular forme cylinder (203;
204;
206;
207) which one of interacts with, and is capable of interacting with the particular inking unit (227) which contains its ink reservoir (231), characterized in that an intersection angle between the reference plane (E2) and the at least one reservoir sectional plane (S3) of the respective ink reservoir (231), amounts to no more than 35°, and in that the simultaneous sheet printing unit (200) has precisely four forme cylinders (203;
204;
206;
207), of which precisely two forme cylinders one of have direct contact with and are arranged to interact directly with the first collecting cylinder (201) and of which the other two forme cylinders one of have direct contact with and are arranged to interact directly with the second collecting cylinder (202), and wherein the sheet-fed printing unit (200) has precisely two cylinders (211;
212) of a second type, formed as sheet transfer cylinders (211;
212), each of which sheet transfer cylinders one of has direct contact with and is arranged to interact directly with one of the two cylinders (201;
202) of the first type, and wherein at least one of the precisely two cylinders (211;
212) of the second type is formed as an infeed sheet transfer cylinder (211) and forms an infeed transfer point (213) with a cylinder (201;
202) of the first type, and in that at least one of the precisely two cylinders (211;
212) of the second type is formed as an outfeed sheet transfer cylinder (212) and forms an outfeed transfer point (214) with a cylinder (201;
202) of the first type.

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Sheet-fed printing machine having a simultaneous printing unit for security printing

Life of this patent

Sheet-fed printing machine having a simultaneous printing unit for security printing

Life of this patent

Abstract

Claims18