Supply device for a machine working periodically on a web of material in stopped position
US5271541A · kind A · utility
3Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Mar 26, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H20/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A supply device for a machine periodically working on a web of material in a stopped position, particularly a flat cutting press, comprising, upstream of the machine, a hollow suction cylinder over which the web passes before penetrating in the machine. A vacuum source is provided to create a depression and a valve is provided to cyclically vary the depression in the suction cylinder between a first, relatively high value, substantially during the phase of the cycle of the machine corresponding to the acceleration of the web, and a second, relatively low value, during the rest of the cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.