Prong and tang binding system
US4887925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1988 |
| Grant date | Dec 19, 1989 |
| Priority date | — |
| Expiry date | Aug 26, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42F13/06
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A prong or tang-type paper sheets binding system includes a cover marginal edge on which or over which the connector base and the prongs or tangs are abutted or bent with respect to the edge. An integral imperforate edge extension is provided which is foldable over the bent prongs and any keeper and foldable over the prong base or head to cover the exposed unattractive metal components of the connector including the prongs or tangs. In a preferred embodiment a second integral edge extension which contains a slot sized to encompass the bent prongs and a keeper if employed, or the prong base is foldable over the imperforate extension so that a planar smooth-finished surface of the imperforate extension covers the otherwise exposed metal components of the connector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.