Supporting and releasably holding device for a printing cylinder hub

A technology of cylinders and equipment, applied in general parts of printing machinery, printing, printing machines, etc., can solve problems such as inaccurate detection, gaps, printing errors, etc.

Inactive Publication Date: 2006-03-15
马里亚·格拉齐亚·瓦伦蒂尼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Another common disadvantage of prior art printing machines is the use of rotary motors, the motion being transmitted through ball screws causing the stencil carrying cylinder and the support of the anilox roller to move linearly towards or away from the counter pressure drum
In fact, as is well known to those skilled in the art of printing presses, such a cylinder operating system can lead to considerable gaps, in any case resulting in printing errors greater than one hundredth of a millimeter When printing, this printing error is intolerable
In addition, the rotary motor is provided with a circular encoder, which makes it impossible to accurately detect the position of the operated cylinder, thus requiring a calculation algorithm in the electronic control unit of the printing press

Method used

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  • Supporting and releasably holding device for a printing cylinder hub
  • Supporting and releasably holding device for a printing cylinder hub
  • Supporting and releasably holding device for a printing cylinder hub

Examples

Experimental program
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Embodiment Construction

[0052] Referring first to the above-mentioned drawings, it can be noted that one of the components, a flexographic color assembly or unit 1, includes a stencil- or sleeve-loaded main cylinder 2 and a screen or interlocking cylinder 3 , at the ends of the two rollers are provided respective axially aligned hubs 2a, 2b and 3a, 3b (hub 3b not shown in the figures), as known to those skilled in the art.

[0053] The hubs 3a, 3b of the screen drum 3 are supported and rotated on a first pair of sliding supports 4a and 4b, which in turn are slidably mounted on corresponding parallel guides 5c (Fig. 5), guiding The member 5c is arranged on a second pair of sliding supports 5a and 5b, each support 5a or 5b rotatably supports a corresponding hub 2a, 2b of the stencil carrying cylinder 2, and is provided with a guide element 5d, so that The guide element 5d described is designed to slidably engage a corresponding guide (not shown in the drawings) parallel to the guide 5c, and is provided...

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PUM

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Abstract

A printing machine colour assembly having a main or clich-carrying cylinder (2) and an interlocking or screened cylinder (3), each carried at its hubs (2a, 2b; 3a, 3b) by first (4a; 5a - operator side) and second (4b; 5b - motor side) slidable supports positioned on different sides of the printing machine and parallel displaceable independently from one another. The first support (5a) of at least the main cylinder (2) is detachable from the respective hub (2a) to cantileverwise position the main cylinder (2) on the second support (5b) thereby carrying out sleeve replacement on the main cylinder (2). At least one auxiliary supporting means (17) at the second support (5b) of at least the main cylinder (2) is designed to engage with, and assist in supporting, it when cantileverwise positioned for replacing a sleeve.

Description

technical field [0001] The present invention relates to a support and releasable holding device for a hub of a rotatable cylinder, which is particularly, but not exclusively, suitable for replacing a the anilox or cliche-carrying sleeve; and the use of linear motors for operating the sliding support of the cylinder hub. Background technique [0002] As is well known, each color assembly or unit of a color flexographic printing press consists of a pair of cylinders, a screen cylinder and a stencil-carrying sleeve, parallel to each other and slidable between an operating position and a rest position. Shifted, in this working position, the anilox or screen cylinder, an etched steel cylinder with a wide range of screen frames from 3 to 200 lines per centimeter, is positioned in relation to the stencil-carrying sleeve In the contact position, the stencil-carrying sleeve is in contact with a counterpressure drum or printing drum; while in the rest position, the two cylinders are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F13/20B41F13/34B41F31/30B41F13/008B41F5/24B41F13/00
CPCB41F13/20B41F13/38B41P2200/12B41F13/30
Inventor 克劳迪奥·马焦
Owner 马里亚·格拉齐亚·瓦伦蒂尼
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