Roller pressing device

A technology of rollers and pressing force, which is applied to the general parts of printing machinery, printing, rotary printing machines, etc., can solve the problems of increased difficulty, high control overhead, high structural overhead, etc., and achieve the effect of simple modification

Inactive Publication Date: 2008-05-07
M A N ROLAND DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This known device therefore requires not only a high construction effort, but also a high control effort
Furthermore, this known arrangement requires a complete redesign of the roller bearings, which increases the difficulty of retrofitting an existing printing machine with this type of arrangement

Method used

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Embodiment Construction

[0022] As mentioned at the outset, the main fields of application of the invention are inking and dampening units of printing presses. These devices consist of rollers which, during operation, are to be pressed against cooperating rollers or cylinders with a specified force. In this case, the roller can be an ink form roller or a so-called intermediate roller. The ink form rollers must additionally be cut off from the associated printing form cylinder.

[0023] The material pairing between the mutually interacting elements is selected such that a soft and a hard surface each cooperate. The contact force brings about a flattening of the softer surface, which should remain as constant as possible during operation. The hard surface is usually the metallic surface of the friction cylinder or the plate cylinder. The ink form rollers and intermediate rollers are covered with rubber to form a soft surface. However, as already mentioned at the outset, the diameter of such rubber c...

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Abstract

The invention relates to device for pressing the roller (1)to a paired roller(2,3), capable of implementing constant compression force in the whole operation process by the following method. An actuator (5)for supporting lateral ends of a roller (1) is provided which can generate compression force, and produce the pressing movement of the roller, which runs along the desired compression force. The compression force is kept to a constant value by using a control device (7).

Description

technical field [0001] The invention relates to a device for pressing a roller of a printing press against at least one counter-roller or at least one counter-cylinder. Background technique [0002] The main fields of application of the device are inking and dampening units of printing presses. In this case, rollers with correspondingly differently hardened surfaces rest against each other. Between the rollers with the hard surface there is always a roller with a soft surface consisting of a rubber coating. Correspondingly, a band-shaped flattening of the rubber surface is produced in the contact region as a function of the contact force. This flattening area should remain as constant as possible during the working process in order to achieve as constant working conditions as possible. However, the diameter of the rubber-coated roller changes during operation because the rubber changes volume due to the influence of chemicals and / or due to heating and / or due to wear and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F7/40B41F13/20B41F13/38B41F31/38
CPCB41F13/38B41F13/34
Inventor G·科佩尔卡姆M·蒂尔
Owner M A N ROLAND DRUCKMASCHINEN AG
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