Binding mechanism for loose-leaf binder
US4172675A · kind A · utility
Inventor
Key dates
| Filing date | Mar 14, 1978 |
| Grant date | Oct 30, 1979 |
| Priority date | — |
| Expiry date | Mar 14, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42F13/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to a binding mechanism for loose-leaf binder comprising, mounted on a support, at least two rings each constituted by a fixed vertical receiver pin, the upper end of which is hollow, a fixed, vertical, tubular hoop-guide and a movable hoop-shaped member engaged, in closed position, in the upper end of the pin and slidable vertically in the hoop-guide and pivoting in a plane parallel to the plane of the leaves, to come to open position. The simultaneous control of the movement of the hoops is effected by a slide provided with ramps, the lower ends of the hoops being engaged both in fixed ramps fast with the support and in the ramps for controlling the slide. The invention is particularly applicable to binders or folders for perforated leaves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.