US 2010/0287775 A1Published application

Method and device for producing helical screens

OwnerWolfgang Bachmann, Marcel Julien +1inventors

InventorsWolfgang Bachmann, Marcel Julien, Pascal Julien

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Abstract

A method and a device for producing helical screens by winding wires made of plastic into individual spirals, which are inserted into each other in an overlapping way in the transversal direction on a working surface and are united parallel to each other into permeable sheet materials by fixing wires. In order to achieve the task to provide a method and a device with which screen belts with spirals and fixing wires can be produced with low personnel, energy and investments costs (equipment costs) and low amounts of waste with high precision and reproducibility with low time effort, the invention proposes for the spirals to be deposited on winding devices by means of moveable joining devices next to each other on the work surface after winding and to be engaged on said work surface by transverse displacements and connected to each other by the fixing wires.

Claims24

Dependent claims

A method for the production of coil screens comprising winding wires of synthetic materials into individual coils which are slid one into the other on a working surface in the transverse direction such that they overlap and, using fixing wires, are combined parallel to one another into porous areal formations, wherein the coils after the winding are deposited one next to the other on the working surface and on this working surface are brought into engagement by a joining device and are connected with one another using the fixing wires, wherein

a) the coils are generated through the at least one winding device above the working surface and, after thermal forming operation, through a movement of the joining device are deposited next to a guide rail on the working surface,
b) the particular succeeding coils through a movement of their winding device and the joining device succeeding thereto, are deposited between the guide rail and the previously deposited coils on the working surface, wherein the at least one previously deposited coil through the movement of the joining device transversely thereto is displaced by a measure of the overlap on the working surface, and wherein
c) the particular last deposited coils are connected with one another through at least one inserted fixing wire.

Dependencies are inferred from the claim text.