Web bowing apparatus
US5946961A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1998 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | May 1, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D37/08
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The inventive apparatus allows for bowing a continuous web being advanced axially of its length, about either or both axes that lie parallel to or perpendicular to its length. The parallel axis bowing structures include a plurality of separate stations spaced axially apart of web travel, each station having a pair of cylindrical outer rollers and a convex inner roller, respectively supported on opposite sides of the web operable to engage the web faces generally opposite one another. All outer rollers can be substantially the same and all inner rollers can be substantially the same. Mounting structures set the orientation of or included angle between the outer rollers differently at the different stations, to be parallel to different portions of the inner roller. Threaded screws force the rollers against opposite web faces, yielding progressive web bowing up to the curvatures of the inner roller as the web proceeds past each station. The perpendicular axis bowing structures include two sets of axially separated upper and lower rolls positioned against the opposite web faces, and a bias roll mounted to be adjusted against one web face and to project past the straight line tangent be…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.