| 摘要 |
A post construction for looseleaf binders in which the post is comprised of two interengaging complementary parts, one for each cover. The two post parts are expanded by interior means to force them into tight engagement with the wall of a bore through the paper block and this operates to lock the binder. The post with its two parts assembled is generally tubular, and each part is made up of one or more sector shaped pieces of the tubular wall. The binding post parts can be formed integrally with their respective covers or they can be independent elements separate from the covers.
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