Apparatus for flattening the bent-up edge of a sheet workpiece
US4145796A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1977 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Aug 2, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06C3/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.