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Machine for processing sheet made of printing carriers

A technology for substrates and sheets, applied in printing machines, printing, object supply, etc., can solve the problems of complex control of adjustment drives, and achieve the effect of simple structure, reliable function, and reasonable cost

Inactive Publication Date: 2009-07-29
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although only a single such frame-mounted adjusting drive and its energy supply are relatively uncomplicated, the electrical or pneumatic control of this adjusting drive is still relatively complex, because through this control it must be ensured that: at any machine speed And for any sheet length specification adjustment of the rear gripper bridge, the adjustment drive must precisely make switching contact with the rear gripper bridge
There is a synchronization problem

Method used

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  • Machine for processing sheet made of printing carriers
  • Machine for processing sheet made of printing carriers
  • Machine for processing sheet made of printing carriers

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] figure 1 A printing press 1 is shown which has an offset printing unit 2 and a delivery 3 for sheets 4 of printing stock having a sheet length 20 . The printing unit 2 comprises a plate cylinder 5 , a blanket cylinder 6 and an impression cylinder 7 for offset printing. The delivery 3 has a first chain conveyor 8 and a second chain conveyor 9 as sheet conveying means, which convey the sheets 4 to a delivery pile 10 and in this case circulate synchronously with each other run. The first chain conveyor 8 includes a front gripper bridge 11 for gripping the sheet 4 at each front running sheet end 4.1 or edge, and the second chain conveyor 9 includes a Each rear gripper bridge 12 grips the sheet 4 at the rear running sheet end 4.2 or edge. These gripper bridges 11 , 12 function as gripping devices for holding the sheet 4 at both ends. The first chain conveyor 8 comprises a pair of endless chain belts 90 between which the front gripper bridges 11 are carried, and the secon...

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Abstract

The invention relates to a machine for processing sheets made of printing materials, which machine comprises: a first chain conveyor with a front gripper bridge for gripping a preceding sheet end of the sheet a second chain conveyor with a rear gripper bridge for simultaneously gripping the sheet ends running behind the sheets; a second chain conveyor arranged next to these chain conveyors for processing the sheets Processing device; and for temporarily reducing the gripper bridge distance between two gripper bridges and thereby changing the distance of the sheet sag required for the processing of the sheet by means of the processing device. mechanism. The distance changing mechanism is constituted in such a way that the first orbit (21) of the front gripper bridge determined by the first chain conveyor and the second orbit (21) of the rear gripper bridge determined by the second chain conveyor The orbiting tracks (22) run partially offset from one another. The processing device can be, for example, a sheet straightener (14).

Description

technical field [0001] The invention relates to a machine for processing sheets made of printing substrates. Background technique [0002] The invention is based on the following background: The processing device can be a sheet straightener, past which two chain conveyors transport the sheets in order to decurl the sheets by the sheet straightener. If these gripper bridges hold the sheet under tension—that is, without sheet sag—in the area of ​​action of the sheet straightener, no formations can be formed on the sheet to be sucked by the flattener in its flattening gap. The underlying substrate is dented. For sheet straightening or decurling it is therefore necessary to shorten the distance of the gripper bridges immediately before the sheet enters the range of action of the sheet straightener and thereby generate a sheet sag. Since the sheets are advantageously transported without sagging outside the range of action of the sheet leveler, the distance between the gripper b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F21/08
CPCB65H2404/34B65H2301/51256B65H2701/1313B65H2801/21B65H2701/1311B65H5/085B65H2406/351B65H2220/09
Inventor 彼得·弗希马库斯·默林格斯特凡·穆彻尔保罗·妮古拉马里乌斯·施特尔特拉尔夫·瓦德林格
Owner HEIDELBERGER DRUCKMASCHINEN AG
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