US 6,394,386 B1Granted

Paper reel for yarn packages

OwnerYueh-O Loinventor

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Abstract

A paper reel for yarn packages, and especially a paper reel of which the upper end is cut into a ladder like multiple layered end, the cut wall is folded inwardly twice, so that the end of the paper reel is folded onto a shoulder of the ladder like cut and is fixed, and the end of the paper reel will not warp nor has a paper rough edge. Both ends of the paper reel are processed to form a round shape, the ladder like portion has cut wall portions on its shoulders; the cut wall portions are folded to the shoulders one by one, the thickness formed by the cut wall portions folded back to the shoulders can afford a larger pressure when the paper reel is subjected to an axial force, thereby, the cut wall portions will not warp. The inner surface of the paper reel thereby is a smooth surface to be smoothly slipped over a rotation axle, yarn on the paper reel can thus be uninterruptedly sent out for weaving.

Claims1

Dependent claims

An improved structure of paper reel for yarn packages, said paper reel having an upper end wherein the upper end of said paper reel is processed to form a round shape, and said upper end is cut interiorly to form a ladder like notch, said notch has a first shoulder and a second shoulder provided for folding of said cut upper end;

a first cut wall portion having a tailing end is left on said first shoulder, and a second cut wall portion having an inner surface is left on said second shoulder;
said first cut wall portion is folded to said first shoulder, the thickness formed by said first cut wall portion folded onto itself exactly equals to the thickness of said second cut wall portion, then said first cut wall portion and said second cut wall portion are simultaneously folded onto said second shoulder, the tailing end of said first cut wall portion thus gets close to the inner surface of said second cut wall portion and is fixed thereto, thereby, neither said first cut wall portion nor said second cut wall portion warps.

Dependencies are inferred from the claim text.