Permanently locking ring binder
US6179507A · kind A · utility
11Cited by
16References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42F13/26
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A permanently locking ring binder includes a housing, a pair of hinged plates within the housing, each supporting a plurality of ring segments arranged so that, when the plates are in one position, the ends of the ring segments are spaced apart, so that one can insert loose-leaf papers over the segments, and a second position, in which the ends of opposing ring segments meet, forming closed rings for retaining the papers. The binder has an initially inactive lock which can be activated once papers have been placed in the binder, to prevent movement of the rings to their open position. The lock cannot be manually deactivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.