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Single sheet paper transferring roller

A technology for conveying rollers and sheets of paper, applied in the direction of printing machines, general parts of printing machinery, printing, etc.

Inactive Publication Date: 2005-03-02
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the known sheet-fed transport cylinders of this type there is the problem that, depending on how much the second comb segment is rotated relative to the first comb segment, a larger or smaller gap is produced between the teeth of the comb segment. Interstices through which air flows from the inside to the outside of the sheet-fed transfer cylinder under the action of centrifugal force

Method used

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  • Single sheet paper transferring roller
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Examples

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Embodiment Construction

[0021] exist figure 1 shows a tandem sheet-fed rotary printing press with a sheet feeder 1, with printing units 2, 3 for printing sheet-fed substrates according to the offset printing method, with a printing unit 2, 3 3 between an overturning device 4 and a sheet-fed delivery device 5 .

[0022] Each printing unit 2 , 3 comprises an impression cylinder, a blanket cylinder and an opposing impression cylinder 6 , 7 . The turning device 4 has three sheet-sheet transport cylinders 8 , 9 , 10 arranged between opposing impression cylinders 6 , 7 . The sheet-fed transfer cylinder 9 acts as a so-called storage cylinder and holds the sheet-fed printing material firmly on its leading edge by means of its gripper system. The sheet-fed transfer cylinder 10 acts as a so-called reversing cylinder (Wendetrommel) and by means of its gripper system grabs a rear edge of the sheet-fed substrate in order to turn it over and remove it from the sheet-fed transfer drum. 9 up and down.

[0023] A...

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PUM

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Abstract

Provided in a sheet-fed printing machine is a sheet transport drum (9), including a first comb segment (11) and a second comb segment (12), the second comb segment (12) being mounted so as to be rotatable relative to the first comb segment (11) for providing an adjustment to a format length corresponding with that of a printing-material sheet. The characteristic of the sheet transport drum (9) of this invention is that the comb segments (11, 12) being formed of prongs (14) having interspaces (15) therebetween, and at least one covering (19) provided for covering the interspaces between the prongs.

Description

technical field [0001] The present invention relates to a sheet-fed conveying cylinder and a sheet-fed printing machine using the sheet-fed conveying cylinder. Background technique [0002] In the known sheet-fed transport cylinders of this type there is the problem that, depending on how much the second comb segment is rotated relative to the first comb segment, a larger or smaller gap is produced between the teeth of the comb segment. Interstices through which air flows from the inside to the outside of the sheet-fed transfer cylinder under the action of centrifugal force. Undesirable air escape from the sheet transfer rollers can cause uncontrolled sheet-fed substrates to cover these gaps during transfer from one sheet transfer roller to the next. to float. This unavoidable construction-related disturbance of the sheet-fed transport in known sheet-fed transport cylinders has hitherto prevented a further increase in the rotational speed of the sheet-fed transport cylinde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F21/10B65H5/12
CPCB41F21/106
Inventor 克里斯蒂安·希贝
Owner HEIDELBERGER DRUCKMASCHINEN AG