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Device for conveying page

A technology of sheets and guide elements, applied in the field of devices for conveying sheets

Active Publication Date: 2012-10-03
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Guiding the sheets separately in the area in front of and behind the printing nip causes particular problems

Method used

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  • Device for conveying page
  • Device for conveying page
  • Device for conveying page

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] figure 1 An impression cylinder 1 and a transfer cylinder 2 of a sheet printing press are shown, which are mounted rotatably in the side walls in the direction of the arrows 3 , 4 . A gripper system 6 is arranged in the channel 5 of the impression cylinder 1 . The sheet 7 is held at the front edge in the grippers of the gripper system 6 . The sheet 7 receives a print 8 in the printing nip between the impression cylinder 1 and the transfer cylinder 2 . A detection device 9 with a light transmitter 10 and a light receiver 11 is provided for controlling and / or adjusting the printed characters 8 . The signal of the detection device 9 is processed in the control device 12 to form a control signal for the ink metering device. A measuring beam 13 emerges from the light transmitter 10 , which strikes the surface of the sheet 7 in the detection region a. The radiation beam 14 reflected on this surface reaches the optoelectronic optical coupler 11 .

[0016] In order to prev...

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PUM

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Abstract

The present invention relates to a device for conveying page. The device is provided with an impression cylinder which can be rotatingly supported on the side wall; a transferring rotary drum which is rotatingly supported on the side wall, and a printing gap is formed between the rotary drum and the impression cylinder which are revolved at the same speed; at least one tooth-holding system arranged on the rotary drum body of impression cylinder and used for maintaining the front line edge during the period of conveying pages through the printing gap; first and second page guide components which are arranged behind the printing gap along revolving direction of the impression cylinder, are arranged at intervals and are respectively provided with a guiding surface opposite to pages. The guiding surface of the second page guiding component of downstream is parallel with a tangent plane tangential with the circumference of loading pages of the impression cylinder, the guiding surface of the first page guiding component of upstream is inclined to the tangent plane and parallel with a spin axis of the impression cylinder, an entering seamed edge which is opposite to the printing gap is arranged below the guiding surface of the second page guide component, and an outgoing seamed edge which is deviated from the printing gap is arranged above the guiding surface of the second page guide component.

Description

technical field [0001] The invention relates to a device for conveying sheets according to the preamble of claim 1 . Background technique [0002] In a sheet printing press, the sheet is transported at the leading edge in a gripper system by an impression cylinder and a transfer cylinder. In order to prevent the sheets from colliding with machine parts and to ensure a stable position of the sheets relative to the detection device during the detection, sheet guide elements are used. Mechanical guide elements such as guide brackets, guide rollers or guide wheels can only act on those areas of the sheet that are not printed. Pneumatic guide elements such as rollers or transfer rollers or guide plates with circumferential surfaces that attract the sheets or form an air cushion as well as ducts with blowout openings have a limited effect when they are at a greater distance from the sheet due to the conveying path . Known solutions use blowing pipes with a distance of 10-40 mm ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F21/10B41F21/00
CPCB41F21/00B41F21/10
Inventor W·盖斯勒P·哈赫曼A·亨M·克拉默
Owner HEIDELBERGER DRUCKMASCHINEN AG