Method for cleaning a circumferential surface of a cylinder of a printing press

Abstract

The invention relates to a method for cleaning a circumferential surface of a cylinder of a printing press. The method can realize improved cleaning t during a short time. In order to clean the circumferential surface, a cleaning fluid is first applied to the circumferential surface (15). In order then to remove contaminants (17), the contaminants (17) are broken up mechanically after the cleaning fluid is applied and before a cleaning apparatus (6) acting on the circumferential surface (15) is set into operation.

Description

technical field

[0001] The invention relates to a method for cleaning the outer surface of a cylinder of a printing press, in which a cleaning fluid is applied to the outer surface and in which a cleaning fluid is applied to the outer surface in order to remove dirt. The cleaning device on the jacket surface operates. Background technique

[0002] For cleaning the outer surfaces of the cylinders of printing presses, it is known to use cloth washing devices and / or brush washing devices. The washing device can be assigned to exactly one drum or be used as a combined washing device for several drums.

[0003] In offset printing, printing ink is transferred from the printing plate onto the surface of the blanket. In the printing nip between the blanket cylinder and impression cylinder, the printing ink is transferred image-wise onto the sheet or web. During printing, paper stripes are deposited on the blanket in the region of the side edges of the printing material. These pa...

Examples

Embodiment Construction

[0020] Figure 1-3 A schematic diagram of the printing unit of a wet offset printing press is shown. The printing unit essentially comprises a plate cylinder 1 , a blanket cylinder 2 , an impression cylinder 3 , ink form rollers 4 , dampening agent application rollers 5 and a brush cleaning unit 6 . A printing forme 7 is tensioned on the cylinder body of the printing forme cylinder 1 . An elastic blanket 8 is stretched over the cylinder body of the blanket cylinder 2 . The cylinder body of the impression cylinder 3 has a lining 9 which repels printing ink. The cylinders 1 - 3 are held in the side walls of the printing press and are mounted rotatably in the direction of the arrow by means of a drive. The drive can be via a gear train or by means of a separate drive. The blanket cylinder 2 can be pressed selectively with the plate cylinder 1 or with the impression cylinder 3 or simultaneously with the plate cylinder 1 and the impression cylinder 3 by means of a device. The c...

technical field

[0001] The invention relates to a method for cleaning the outer surface of a cylinder of a printing press, in which a cleaning fluid is applied to the outer surface and in which a cleaning fluid is applied to the outer surface in order to remove dirt. The cleaning device on the jacket surface operates. Background technique

[0002] For cleaning the outer surfaces of the cylinders of printing presses, it is known to use cloth washing devices and / or brush washing devices. The washing device can be assigned to exactly one drum or be used as a combined washing device for several drums.

[0003] In offset printing, printing ink is transferred from the printing plate onto the surface of the blanket. In the printing nip between the blanket cylinder and impression cylinder, the printing ink is transferred image-wise onto the sheet or web. During printing, paper stripes are deposited on the blanket in the region of the side edges of the printing material. These pa...

Examples

Embodiment Construction

[0020] Figure 1-3 A schematic diagram of the printing unit of a wet offset printing press is shown. The printing unit essentially comprises a plate cylinder 1 , a blanket cylinder 2 , an impression cylinder 3 , ink form rollers 4 , dampening agent application rollers 5 and a brush cleaning unit 6 . A printing forme 7 is tensioned on the cylinder body of the printing forme cylinder 1 . An elastic blanket 8 is stretched over the cylinder body of the blanket cylinder 2 . The cylinder body of the impression cylinder 3 has a lining 9 which repels printing ink. The cylinders 1 - 3 are held in the side walls of the printing press and are mounted rotatably in the direction of the arrow by means of a drive. The drive can be via a gear train or by means of a separate drive. The blanket cylinder 2 can be pressed selectively with the plate cylinder 1 or with the impression cylinder 3 or simultaneously with the plate cylinder 1 and the impression cylinder 3 by means of a device. The c...

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