| 摘要 |
PROBLEM TO BE SOLVED: To provide a ring binder mechanism which uses less material than conventional ring binders and is yet rigid enough to operate over an extended period without permanent deformation that could lead to an inoperable state. SOLUTION: A ring mechanism for retaining loose-leaf pages includes a housing having a central top part and an open bottom part generally opposed to the central top part. The central top part has a longitudinally extending channel therein along the entire length of the housing. A plurality of hinge plates supported by the housing may pivot relative to the housing. The hinge plates support ring members that pivot with the hinge plates to open and close rings for adding and removing loose-leaf pages. In one version, the housing can be of a skeletonized construction, with the channel providing additional rigidity for the housing. COPYRIGHT: (C)2007,JPO&INPIT
|
