Flat advancement of running web between guide rollers
Abstract
Abstract A method and apparatus for the flat advancement of one or more running webs of paper between two guide rollers and/or for combining two such webs, the apparatus comprising a pair of guide rollers between which a web is to be passed, a table having a guide surface positioned along the path of the web between the guide rollers, and an air removal body in tandem with the table to form a vacuum zone between the web and the surface thereby drawing the web toward the surface while the web moves therealong, the air removal body having a sharp edge directed against the direction of movement of the web. Advantageously the air removal body has a sharp edge positioned adjacent one of the guide rollers so as to form therewith a narrow gap through which the supply web is carried, the active surfaces of the air removal body and guide table lying in a common plane. A working cylinder may be pivotally connected to the air removal body to permit it to be lowered to enlarge the gap with the guide roller to facilitate threading up of the web.
Inventors
- 👤 Karl-Otto Lansmich
Bibliographic Details
Claims Analysis
Total Claims: 6References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |