Patent ID: 6588697
Filing Date: 2003-07-08
Classification: B65H

Abstract:
A spool structure comprising;a cylindrical core having a hole-free outer surface and an inner surface with an engaging part, and a flange having a jaw part for location at an end of the core, and a nail part for engaging the engaging part of the inner surface of the core, wherein: the nail part comprises an elastic member extending toward the engaging part of the inner surface of the core to engage with the engaging part, the nail part is adapted to be released from the engaging part when a predetermined releasing force is applied to the nail part to move the nail part away from the engaging part, the jaw part has a through hole for access from an area opposite the core with respect to the jaw part to a surface of the nail part on a side of the engaging part, the nail part extends from the end of the core to the engaging part along the inner surface of the core, the nail part has a tip part for engaging the engaging part, the core has a groove at an area in the inner surface facing a surface of the nail part on a side of the engaging part, and the groove of the core is for communication with the through hole of the jaw part.