发明名称 |
Binder backing for notebooks |
摘要 |
A stability unit used in combination with a three ring binder of the type having front and back covers hingedly mounted between a spine. A binder assembly including arcuate rings halves is mounted to either the spine or cover. The stability unit is mounted to either a spine, cover or both. The stability unit includes recesses adjacent each ring halve and is constructed and arranged such that a ring halve may be inserted therewithin past a resilient projection which provides a locking function. When locked, the binder may be positioned in an upright attitude.
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申请公布号 |
US4750884(A) |
申请公布日期 |
1988.06.14 |
申请号 |
US19850764411 |
申请日期 |
1985.08.09 |
申请人 |
AMERICAN TRADING AND PRODUCTION CORPORATION |
发明人 |
BOURGEOIS, THOMAS W.;STUERTZ, WILLIAM D. |
分类号 |
B42F13/00;(IPC1-7):B42F13/00;B42F3/00 |
主分类号 |
B42F13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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