Composite product having a tubular metal casing with a welt-type seam, and a core in powder form, which can be rolled up
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United States of America Patent
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Nov 24, 1987
Grant Date -
N/A
app pub date -
Feb 27, 1984
filing date -
Mar 3, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concerns a composite product, also referred to as cored wire, comprising a tubular metal casing having a welt-type seam, containing a core of compacted powder or granular material, which can be easily rolled up and then unrolled, without the risk of the seam coming undone. The composite product according to the invention comprises, on the outside wall of the casing and straddling the seam region, hollow impressed portions which are produced by cold deformation of the metal. These portions are in the form of grooves which are elongate transversely with respect to the axis of the composite product. The composite product according to the invention is used, in particular, for treating metal baths.
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