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Class Information
Number: 242/118.31
Name: Winding, tensioning, or guiding > Bobbin or spool > Cop-tube type (i.e., headless or single-headed tube) > Reinforcing feature
Description: Winding cores including means to strengthen the tube structurally.

Patents under this class:

Patent Number Title Of Patent Date Issued
7802751 Tape reel, recording tape cartridge, take-up reel, and drive device Sep. 28, 2010
6394386 Paper reel for yarn packages May. 28, 2002
6302343 Textile tube Oct. 16, 2001
6199676 Inflatable tubular structure with spiral seam Mar. 13, 2001
5967455 Single-step molded reel Oct. 19, 1999
5820049 Rigid plastic dye tube Oct. 13, 1998
5513820 Core plug apparatus May. 7, 1996
5505395 Multi-grade paperboard winding cores for yarns and films having enhanced resistance to inside diameter reduction Apr. 9, 1996
5501406 Plastic bobbin carrier Mar. 26, 1996
5178342 Dyeing cone Jan. 12, 1993
4901940 Plastic yarn cone having reinforced nose for damage protection Feb. 20, 1990
4874139 Tubular core assemblies for rolls of paper or other sheet material Oct. 17, 1989
RE33060 High speed carrier with deckled underply Sep. 19, 1989
4742972 Carrier for textile yarn May. 10, 1988
4519557 Plastic bobbin May. 28, 1985
4462556 Tube with reinforcing strip Jul. 31, 1984
4245799 Textile bobbin Jan. 20, 1981
3980249 High speed carrier with deckled underply Sep. 14, 1976

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