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Web transport system

A conveying system and conveying table technology, which is applied to the system field of strips, can solve the problems of strips without mechanical strength, not suitable for conveying ultra-thin strips, and low mechanical strength.

Inactive Publication Date: 2003-07-09
DUPONT TEIJIN FILMS U S LLP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Additionally, these prior art delivery systems are not suitable for delivery of ultra-thin strips such as submicron sized strips
At such thickness, the strip has no mechanical strength or its mechanical strength is very small, so the technical solution of the prior art cannot be used
Strip jumping leads to high mechanical stress on the strip and thus possible damage to the strip

Method used

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Embodiment Construction

[0039] The invention will be described with reference to a preferred embodiment in relation to a planar conveyor table. The invention is not restricted to planar work tables, but it can also be implemented on cylindrical or prismatic surfaces of any possible cross-section. Such surfaces are in fact circular or prismatic conveyor tables.

[0040] figure 1 It is a schematic diagram of a vertical section of a part of the conveying system of the present invention along the conveying direction. figure 1 The conveying system comprises a conveying table 1 on which a strip 3 can be conveyed on a surface 2 of the conveying table 1 . The conveyor table comprises a series of blowing means such as holes or slots 4a-4d through which air or other gas can be blown out of the air box or chamber 5 located below the blowing means. For blowing air, a fan or other type of exhaust (not shown in the figure) can be used. The static pressure in the pressure box is 0.01 bar - 0.5 bar (1000 Pa to 5...

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PUM

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Abstract

The invention relates to the transport of web. It proposes using at least one table element, comprising: at least one inclined blowing means (4a-4d); at least one rounded hump (8); at least one sucking means (6a-6c) between said blowing means and said rounded hump. The rounded hump allows the sucking of air without any risk of tearing or breaking the web. The limited amount of air ensures high transport forces, and increased efficiency of the transport system.

Description

technical field [0001] The present invention relates to a system for conveying webs such as PET, PEN and their copolymers and webs of other polymers. In general terms, this conveying system is suitable for all plastic strips, laminated or coextruded strips, paper rolls, metal foil rolls such as aluminum rolls, woven or nonwovens. Background technique [0002] Strip conveying systems are required, for example at the outlet of the tenter furnace or coating system, or even inside the furnace, or for conveying the strip to the winding station. Prior art web conveying systems include the Coanda system in which an air stream is injected parallel to the surface of the table at the upstream edge of the table. The strip is sucked and transported downstream of the conveyor table under the action of air flow. Such systems have the following disadvantages. First, they only work properly over relatively short distances. To be precise, after a certain distance, the strip will fly, jum...

Claims

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Application Information

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IPC IPC(8): B65H23/24
CPCB65H2406/112B65H23/24
Inventor H·库尔曼E·菲尔德勒
Owner DUPONT TEIJIN FILMS U S LLP