| 摘要 |
An improved sheet binding device for fastening together a plurality of sheets having pre-punched, spaced-apart openings, comprises an elongated backing member extending between such spaced-apart openings; and, attached to the backing member at spaced-apart positions corresponding to the spacing between such openings, a plurality of fastening elements, each comprising a connecting portion for insertion into such openings, and at the end of said connecting portion remote from said backing member, locking means movable between (1) a collapsed position in which the fastening element is insertable into such opening, and (2) an expanded position in which the locking means is effective to preclude removal of such sheets from said fastening element. This structure can be integrally molded from plastic material. In a preferred embodiment, the structure is substantially self-locking. Single-hole embodiments suitable as replacements for conventional brass head fasteners are also disclosed. |
