Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Plural sequential shaping or molding steps on same workpiece
Reexamination Certificate
2011-06-28
2011-06-28
Johnson, Christina (Department: 1742)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Plural sequential shaping or molding steps on same workpiece
C264S229000, C264S231000, C264S257000, C264S259000, C264S271100, C264S284000, C264S286000, C264S287000, C264S294000, C264S296000, C264S319000, C264S320000, C264S324000, C264S330000, C264S331110, C264S507000, C623S001220, C623S001280, C623S001290, C623S001320, C623S001440, C623S001450
Reexamination Certificate
active
07968036
ABSTRACT:
There is disclosed a method for introducing a helical formation (11) into a flexible tubular material (12). The material (12) is supported together with a surrounding helical former (13) so as to deform the material (12) to have a helical indentation (11) corresponding to the shape of the former (13). The material (12) is then set in that configuration and the former (13) is removed.
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Dick John Bruce Cameron
Duff Craig McLeod
Hood Robert Gordon
Houston John Graeme
Johnstone Allana
Johnson Christina
Khare Atul
Renner Kenner Greive Bobak Taylor & Weber
Tayside Flow Technologies Limited
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