Self-sealing envelope
US4759643A · kind A · utility
54Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Aug 24, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D27/16
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-sealing envelope in which the opening is defined between a taller flap and a shorter flap and the height of the shorter flap is such that when a protective peal-off tape is removed from a band of pressure sensitive material extending across the taller flap, the upper end of the shorter flap adheres to the lower region of the pressure sensitive band to seal the closure, leaving exposed the upper region of the adhesive band so that when the upper end of the envelope is folded down above the contents, the exposed adhesive band will adhere to the surface of the envelope across the width of the taller flap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.