Laser-beam-absorbing helical support and process and device for the production thereof
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United States of America Patent
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Aug 4, 2015
Grant Date -
Mar 24, 2011
app pub date -
May 15, 2009
filing date -
May 16, 2008
priority date (Note) -
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Abstract
The invention relates to a tubular helical support (1) for the radial support of resiliently expanded tubing (27), a process and a device (18) for the production thereof, and a tubing arrangement (26) comprising a helical support (1) according to the invention, the helical support (1) being made of at least one extruded element (2), which is wound to form a plurality of windings (11, 12, 13) and the connection portions (7, 8) of which are connected to one another at least in portions by a connection seam (15), preferably formed as a laser weld seam. To produce a helical support (1) which reliably withstands the compression forces of the tubing (27), can easily be removed from the expanded tubing (27), and is easy and cheap to produce, it is provided in accordance with the invention that at least the interconnected connection surfaces (9, 10) of the connection portions (7, 8) of the extruded element (2) are not transparent to laser beams.
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