Electro-optical removal of plastic layer bonded to a metal tube
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United States of America Patent
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Dec 9, 2003
Issued Date -
N/A
app pub date -
Jan 28, 2000
filing date -
Mar 3, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for preparing a multi-layer tube, useful prior to endforming for brakeline connections, comprises the steps of forming a metal tube having an outer surface and an end and bonding a corrosion resistant layer to the metal tube outer surface. A surface treatment layer is bonded to the corrosion resistant layer. A first polymeric layer is extruded onto the metal tube, such that is bonds to the surface treatment layer; and a second polymeric layer is extruded onto the metal tube, such that it bonds to the first polymeric layer. The method further comprises the step of vaporizing and removing at least a portion of the first and second polymeric layers from an area adjacent the end by rotating an axially defocused, generally elliptical cross-sectionally shaped laser beam 360.degree. about the area, while leaving the corrosion resistant layer intact.
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