Loose-leaf binder and paper-punch combination
US4749297A · kind A · utility
11Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Feb 24, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42F13/404
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A loose-leaf binder has a paper punch which is actuated by the opening of the binder rings. The arms of the rings are attached to two hinge plates which pivot as the arms are opened and closed. Male and female punch die members on the underside of the hinge plates are brought together when the binder rings are opened, to punch a sheet of loose-leaf paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.