Ring binder mechanism
US7296946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Apr 25, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42F13/26
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A ring binder mechanism for retaining loose leaf pages. The mechanism includes a rigid, elongate plate having a longitudinal axis. Hinge plates are supported by the plate for pivoting relative to the elongate plate. Rings for holding loose leaf pages include ring members mounted on the hinge plates and moveable between a closed position and an open position. A control structure is supported by the elongate plate and controllably pivots the hinge plates to move the ring members between the closed and open positions. The control structure has a travel bar connected to the hinge plates for moving the hinge plates between the closed and open positions. A spring biases the travel bar to a position toward the closed position of the hinge plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.