Welding apparatus for paper
Abstract
Abstract The invention relates to apparatus for welding sheets of paper together by applying energy to the sheets to weld them together when in contact with one another. The apparatus is used with special paper that bonds together when subjected to heat and this apparatus applies heat to selected areas in place of a stapling machine. Temperature of the heating elements is controlled to prevent scorching of the paper and the heating elements retract after each operation of locations which make it impossible for the operation of locations which make it impossible for the operator of the apparatus to be burned accidentally by touching the heating elements. The welder can be used for welding individual sheets together along an edge thereof to make a booklet from pre-cut or folded sheets.
Inventors
- 👤 B Sendor
- 👤 M Sendor
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |