Apparatus for stretching an endless web
US4400238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1982 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Apr 29, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F7/001
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for processing an endless web includes means for supporting the endless web at a first location and a roll for supporting the endless web at a second location. The roll has first and second ends. First and second carriages are engaged to first and second substantially parallel tracks respectively for rotatably supporting the first and second ends of the roll respectively in a normal operating position and for moving the roll relative to the support means along the tracks. A bridge connects the first and second carriages. Means are mounted to the bridge for lifting the roll at a location between the first and second ends, whereby the roll is supported by the lifting means and the first carriage, whereby the endless web may be inserted or removed over the second end of the roll. The lifting means includes a cradle for supporting the roll, means for moving the cradle into and out of a position underneath the roll and means for elevating the cradle while the cradle is in the position under the roll. In a first embodiment of the invention, the elevating means comprises an inflatable cushion adapted to be inflated and thereby raise the cradle and to be deflated and thereby l…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.