Envelope
Abstract
Abstract The invention relates to an envelope of plastic sheet material consisting of a thermoplastic sheet, which is laminated to a sheet of hydrophilic material at least on the side forming the outside of the envelope. The flap belonging to the envelope is laminated to a paper layer at least on its inside, said layer supporting a gumming. The invention also relates to a method for continuously making such envelopes, a web of a plastic sheet laminated according to the above being folded with its edge portions towards a central area, which is left free. One or more paper webs are laminated to this central area and punched-out areas are made in the central area to a desired shape of the flaps of the envelopes. The envelopes are thereafter sealed along their sides by means of transversal welding seams and separated from each other.
Inventors
- 👤 Jan Jiveman
- 👤 Raymond Bengtsson
- 👤 Rasit Kaya
- 👤 Rune Bengtsson
Bibliographic Details
Claims Analysis
Total Claims: 9References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |