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Apparatus for feeding and aligning sheets fed to a processing machine, in particular a printing machine

A technology for processing machines and sheets, which is applied in the field of devices for feeding sheets by sheet processing machines, and can solve problems such as distortion of items to be conveyed

Inactive Publication Date: 2010-01-13
HEIDELBERGER DRUCKMASHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Driving the suction belt at different speeds can lead to twisting of the item to be conveyed

Method used

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  • Apparatus for feeding and aligning sheets fed to a processing machine, in particular a printing machine
  • Apparatus for feeding and aligning sheets fed to a processing machine, in particular a printing machine
  • Apparatus for feeding and aligning sheets fed to a processing machine, in particular a printing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] A machine for processing sheets 7 , for example a printing press 1 , has a feeder 2 , at least one printing unit 3 or 4 and a delivery 6 . The sheets 7 are removed from the sheet stack 8 and fed to the printing units 3 and 4 in sheets or in sheets via an infeed station 9 . In a known manner, these printing units each comprise a printing form cylinder 11 , 12 and blanket cylinders 15 , 20 each interacting with said printing form cylinder. The printing plate cylinders 11 and 12 each have a clamping device 13 , 14 for holding the flexographic printing plate. Furthermore, a device 16 , 17 for semi-automatic or fully automatic plate changing is assigned to each plate cylinder 11 , 12 .

[0026] The sheet stack 8 lies flat on a stacking plate 10 which can be raised and lowered in a controlled manner. The extraction of the sheets 7 takes place from the upper side of the sheet stack 8 by means of a so-called suction head 18, which essentially has a plurality of lifting and pu...

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PUM

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Abstract

The invention relates to an apparatus for feeding and aligning sheets which are fed to a processing machine, e.g. a printing machine, includes at least two parallel transporting belts which, on a side directed toward the sheet, subject the sheet to different retaining forces, in such a way that the retaining force in outer peripheral regions is greater than in an inner region located therebetween. The transporting belts can be activated individually in dependence on the position of the sheet, and they can therefore align the sheet in its transporting direction and obliquely thereto.

Description

technical field [0001] The invention relates to a device for feeding sheets into a sheet processing machine, wherein the sheets are oriented during feeding. Background technique [0002] DE 198 14 141 C2 discloses a device for feeding flat goods, such as boards, into a processing machine. The flat objects are conveyed by means of two suction belts arranged in parallel at a distance from one another and which can be driven at variable speeds independently of one another. [0003] In order to generate different speeds of two suction belts arranged in parallel, it is proposed according to EP 0 926 086 A2 to vary the circumference of a deflection wheel for the suction belts, which is mounted on a drivable shaft, by means of controllable strain elements. Driving the suction belt at different speeds can lead to twisting of the item to be conveyed. Contents of the invention [0004] It is an object of the present invention to provide a device which corrects the tilted position ...

Claims

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Application Information

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IPC IPC(8): B65H5/02B65H9/00B65H7/06B65H7/08
CPCB65H2404/5311B65H9/002B65H5/224B65H2406/322B65H5/021B65H2406/32B65H11/005B65H2220/09
Inventor A·米勒B·沃尔夫
Owner HEIDELBERGER DRUCKMASHINEN AG
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