Paper tube with integral end supports

Details Paper tube with integral end supports Paper tube with integral end supports

1994-03-07

1995-08-15

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Paper containing

428 343, 428192, 138 96R, 138144, 2426104, 2426135, F16L 916, F16L 5700

Patent

active

054417805

ABSTRACT:
A paper tube and method of making the same, having plastic end ring supports and a uniform inside diameter and uniform outside diameter, end-to-end, including the supports. The tube is formed from a multiple ply paper wall. A poly-coated ply is formed at the midpoint of the wall thickness. An annular cut is made interiorly within each end to the poly-coated ply midpoint. A section of wall defined by the cut is removed creating an annular rabbet within each end. An end support ring is inserted in each end. The ring has a body section with an outside diameter equal to the outside diameter of the tube and an inside diameter equal to the inside diameter of the tube. An annular collar extends from one side of the ring body. The collar has an outside diameter equal to the inside diameter of the rabbet. The collar seats in the rabbet and the body abuts the end of the tube resulting in a tube having uniform outside diameter and uniform inside diameter, end-to-end, including the support rings.

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patent: 4372500 (1983-02-01), Saraisky
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patent: 4531930 (1985-07-01), Clauss
patent: 4796668 (1989-01-01), Depret
patent: 5167994 (1992-12-01), Paulson

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