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Sheet feeding device in a printing machine

A printing press and paper feeding technology, applied in printing presses, general parts of printing machinery, printing, etc., can solve problems such as unstable paper running, and achieve the effect of reducing the risk of sliding and smooth running of paper

Inactive Publication Date: 2003-12-24
MANROLANAD AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage here is that, especially during blowing operation, due to the arrangement of the housing which constitutes the air flow resistance, eddy currents occur in the area of ​​the flow opening, which can lead to unstable paper running

Method used

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  • Sheet feeding device in a printing machine
  • Sheet feeding device in a printing machine
  • Sheet feeding device in a printing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The tandem rotary printing press has a plurality of printing units 11 for multicolor offset printing. In addition, at least one varnishing unit or a usual processing station can be arranged downstream of the printing unit 11 . Each printing unit 11 consists of a leveling roll 1 , a blanket roll 3 and a guide roll, shown here as printing roll 4 . Each smoothing roller 1 is provided with an inking unit and optionally a dampening unit. One or more deflection systems 13 (for example single-drum deflection or three-drum deflection) as well as transport rollers 14 are arranged between the printing units 11 as guide rollers.

[0020] In the conveying direction 2 , the carriage 12 is arranged after the last printing unit 11 (or a varnishing unit). The carriage 12 has a continuous endless conveyor system 16 , for example a sprocket system with a sprocket shaft 15 . The paper guide rollers (contact cylinder, deflection system 13 , delivery roller 14 , printing roller 4 ) as we...

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PUM

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Abstract

Disclosed is a sheet feeding device in a printing machine. The invention has the aim of providing a sheet feeding device such as the one described above which enables reliable guidance of sheets both during blast air and suction air operation modes and noticeably reduces the emergence of turbulence. This is achieved in that the sheet feeding device has at least one guide element (6) assigned to the pneumatic system (10) in a flow channel (17) having at least one pneumatic system (10) and a guide surface (8). An even distribution of pressure is achieved on the guide surface (8) by means of the guide element (6) during the blast air operation mode. During air suction operation mode, the guide element (6) makes it possible to selectively feed the pneumatic system (10) with an air flow that has been evenly suctioned in the flow channel (17).

Description

technical field [0001] The invention relates to a paper feed in a printing press with an air flow channel and a guide plane, wherein openings are provided in the guide plane, which openings can be acted upon by blowing or sucking air by means of a pneumatic system. Background technique [0002] A sheet feeder of this type is known from EP 0156173 B1 for the guidance of paper-like printed material printed on one side or on both sides. The guide device is formed by modularly arranged air flow channels, which have openings arranged as air nozzles in a guide plane. The airflow channel has a plurality of blowers to provide blowing or air suction. [0003] In addition, a paper feed device with guide planes containing air passage openings is known from DE 4244499 C2. A blowing or suction box has a guide plane as a covering surface and is connected to a blowing or suction source by means of a blowing or suction line. [0004] The housing forming the airflow resistance protrudes f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F21/00B41F21/10B65H5/22B65H5/38
CPCB41F21/102
Inventor P·乌尔夫P·米歇尔P·弗兰茨S·哈特曼
Owner MANROLANAD AG
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