| 摘要 |
PROBLEM TO BE SOLVED: To provide a core body usable in place of a paper tube by inserting into a core-less stretch film without a paper tube. SOLUTION: This core body comprises a cylindrical body formed by cutting off a part of a wall surface over the entire length and an insert member inserted into the end part of the body. The insert member is formed in a truncated cone shape gradually increased in diameter from the inner surface of the body. Since the insert member is inserted into the cylindrical body inserted into the winding body of the core-less film, the cylindrical body is enlarged, and the outer wall of the cylindrical body is brought into contact with the inner wall of the winding body of the film to reinforce the winding body of the film. COPYRIGHT: (C)2005,JPO&NCIPI
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