Continuous envelope assembly
US4066206A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1977 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Mar 22, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D27/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improved continuous envelope assembly including an elongated ply of paper having control punch margins along longitudinal edges thereof, individual envelopes in the assembly being delimited by transverse lines of weakening extending across the assembly, die cuts in the ply adjacent both longitudinal edges thereof and adjoining the lines of weakening at one side thereof to define the corners of envelope flaps, first glue lines on the ply adjacent the lines of weakening and on the sides thereof opposite the die cut, individual sheets having widths less than the ply and lengths less than the distance between the lines of weakening secured to the ply by the first glue lines, the ply longitudinal edges being folded over the longitudinal edges of the individual sheets, second glue lines securing the ply longitudinal edges to the sheet longitudinal edges, the control punch margins being reverse folded away from the sheets to extend to the sides of the respective sheets longitudinal edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.