Device for feeding sheets to a sheet stack

A kind of technology of equipment and sheets, applied in general parts of printing machinery, printing, printing machines, etc., can solve problems such as wrinkles, sheet damage, tearing, etc.

Inactive Publication Date: 2011-09-21
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the following chain delivery systems in which the sheets are held on their leading and trailing edges, damage to the sheets can result, for example causing wrinkles or tears

Method used

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  • Device for feeding sheets to a sheet stack
  • Device for feeding sheets to a sheet stack
  • Device for feeding sheets to a sheet stack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] 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 into the printing units 3 and 4 individually or in sheets via a supply table 9 . These printing units each comprise a printing form cylinder 11 , 12 in a known manner. The printing plate cylinders 11 and 12 each have a device 13 , 14 for fixing a flexographic printing plate. Furthermore, a device 16 , 17 for semi-automatic or fully automatic plate changing is assigned to each plate cylinder 11 , 12 .

[0014] The sheet stack 8 is supported on a stack 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 pulling suction devices 19, 21 for pulling the sheets 7 Split into sheets. Furthermore, a b...

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PUM

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Abstract

The invention relates to a device for feeding sheets to a sheet stack. In a delivery of a sheet-processing machine, in particular a printing press, provision is made for chain gripper systems for holding the sheets to be transported at the leading and trailing edges thereof. The holding devices are configured such that they can be displaced relative to one another for the purpose of format adjustment. The chain gripper system has a sprocket drive shaft and a sprocket deflection shaft for the chains of the chain gripper system. Here, provision is made for both the sprocket drive shaft and the sprocket deflection shaft to have a clutch.

Description

technical field [0001] The invention relates to a delivery of a sheet processing machine, in particular a printing press, with a chain gripper system for holding and transporting the sheets respectively at the leading edge and the trailing edge of the sheet. Background technique [0002] A chain gripper system of this type is known from DE 103 43 428 A1. The chain gripper system has a first sprocket shaft to be driven and a second sprocket shaft for steering the chain. It is proposed here that the sprockets are mounted rotatably relative to one another for size adjustment and can be fixed by means of a rotary clutch. [0003] The chain of jaw bridges on which the gripper bridges are arranged for holding the leading and trailing edges of the sheets to be transported tends to vibrate in the longitudinal direction during operation. These longitudinal vibrations have no noticeable influence in chain delivery systems in which the sheets are only held at the leading edge during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H29/00B41F21/00
CPCB65H2553/51B65H2301/44331B65H2701/1313B65H2511/22B41F21/08B65H2403/70B65H2801/21B65H29/041B65H2220/09B65H2220/02B65H2220/04B65H2220/11
Inventor P·弗希G·格拉斯米克M·默林格S·穆沙尔
Owner HEIDELBERGER DRUCKMASCHINEN AG
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