Rectangular-faced enclosures
US6056192A · kind A · utility
16Cited by
8References
18Claims
0Family size
Inventor
Key dates
| Filing date | Jan 14, 1997 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Jan 14, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D27/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improvement in the making of a rectangular envelope by folding adjoining triangular corner flaps on a rectangular sheet, and also in the resulting envelopes themselves and the blank sheets from which they are made, whereby certain sheet edge sections on each pair of adjoining triangular flaps become exactly aligned and partially coincident and an overlap of the last-folded closure flap is of uniform width throughout its length, all by application of particular mathematical formulae.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.