| 摘要 |
A number of ½ ring parts ( 13 and 14 ) are arranged at constant intervals on both sides of the spine portion ( 12 ) of binders, and the spine portion ( 12 ) and the ½ ring parts ( 13 and 14 ) on both upper and lower sides are coupled together via thin hinges. As the spine portion ( 12 ) is not in double-split hinge structure, which is different from the case of conventional binders, it is ensured that the spine portion is held until the termination of the binding operation when a binding apparatus is used for causing a holding mechanism to clutch the spine portion of the binders so as to set the binders to face the back of sheets of loose-leaf paper and also causing an engaging mechanism to close and engage the ½ ring parts.
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