Apparatus for flattening the bent-up edge of a sheet workpiece

Details Apparatus for flattening the bent-up edge of a sheet workpiece Apparatus for flattening the bent-up edge of a sheet workpiece

1977-08-02

1979-03-27

Saifer, Robert W.

Textiles: cloth finishing

Expanding device for textile webs

Spreader

38143, 226 97, D06C 300

Patent

active

041457960

ABSTRACT:
A sheet workpiece having an edge bent over on one face of the workpiece towards the center of the workpiece is continuously displaced in a transport direction over a flat support surface that lies against the other face of the workpiece at the bent-over edge. Compressed air is blown from a guide in a flow direction extending transverse to the transport direction, outwardly from the workpiece center, and generally parallel to the surface so as to blow this bent-over edge flat. A plurality of nozzles inclined slightly downwardly toward the surface and backwardly in the transport direction may be employed, as a single elongated nozzle producing a band-shaped current of air may be used, or a plurality of nozzles spread out in a two-dimensional array. Such a flow of air may also be directed from both faces at the workpiece edge in order to flatten out this edge no matter which way it is bent over. When a plurality of nozzles are employed each nozzle may be formed as a plug secured in a support plate having an inclined outlet passage and rotatable in order to vary the flow direction.

REFERENCES:
patent: 2613521 (1952-10-01), Walmsley
patent: 2613522 (1952-10-01), Heffelfinger
patent: 2747250 (1956-05-01), Bramhall, Jr. et al.
patent: 3142107 (1964-07-01), Wittig
patent: 3874043 (1975-04-01), Holm

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