Sheet-fed offset printing press for printing on both sides of sheets

A sheet-fed, offset press technology, used in printing presses, rotary presses, offset rotary presses, etc., to solve problems such as high wear and tear of machine parts and adverse effects on printing quality

Inactive Publication Date: 2010-05-26
HEIDELBERGER DRUCKMASHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The periodic contact and release of these cylinders has a detrimental effect on the printing quality and leads to high wear of the machine components

Method used

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  • Sheet-fed offset printing press for printing on both sides of sheets
  • Sheet-fed offset printing press for printing on both sides of sheets
  • Sheet-fed offset printing press for printing on both sides of sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Figures 1.1 to 1.4Four printing units 1 to 4 of a sheet-fed wet offset printing press arranged one behind the other horizontally are shown. Each printing unit 1 - 4 contains a printing plate cylinder 5 - 8 which has printing plates 9 - 12 . The printing plates 9-12 each lie on an effective diameter D. Furthermore, each printing unit 1-4 contains a transfer cylinder 13-16 which is twice as large. Two semi-cylindrical sections 17 - 24 are formed on the transfer rollers 13 - 16 . In the sections 18, 19, 21 and 24, elastic coverings 25-28 are mounted on the transfer rollers 13-16. The linings 25 - 28 each lie on an effective diameter 2*D. In the sections 17, 20, 22, 23, the transfer cylinders 13-16 have surfaces 29-32 which do not transfer printing ink. Furthermore, each printing unit 1-4 contains a double-sized impression cylinder 33-36 and a double-sized impression cylinder 37-40. The impression cylinders 33 - 36 each have in two semi-cylindrical sections 41 - 48 a...

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PUM

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Abstract

A sheet-fed offset printing press for printing on both sides of sheets has a compact construction and permits a number of color separations to be printed over one another in recto printing or recto and verso printing in a flexible manner and with high print quality. A plurality of printing units, which are disposed behind one another, each include at least one form cylinder, a transfer cylinder, a first impression cylinder and an inking unit having at least one ink applicator roll associated with the form cylinder. A second impression cylinder, which interacts with the transfer cylinder and the first impression cylinder, is provided in at least one printing unit.

Description

technical field [0001] The invention relates to a sheet-fed offset printing press for printing on both sides of a sheet, which has a plurality of printing units arranged one behind the other, in which at least one printing cylinder, a transfer cylinder and A first impression cylinder and an inking unit having at least one ink application roller assigned to the printing form cylinder. Background technique [0002] For multicolor printing of sheets, it is known to arrange a plurality of printing units of the same type one behind the other in the direction of sheet travel. These printing units have a high repetition rate and thus low processing costs. A partial ink image is applied to one side of the sheet in each printing unit. [0003] For multicolor printing on both sides of a sheet, the sheet can be printed on the front side in a first process and printed on the rear side in a second process. Such a machine with a satellite printing unit is known from DE 197 56 796 A1. ...

Claims

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Application Information

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IPC IPC(8): B41F7/06B41F31/10B41F21/00
CPCB41F21/00B41F7/14
Inventor T·施密特
Owner HEIDELBERGER DRUCKMASHINEN AG
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