Method and apparatus for folding continuously fed web in two
US7144357B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2005 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Apr 8, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F13/15747
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Here is disclosed a method and apparatus for folding a continuously fed in two. The web is folded along guide means defining a folding guide line with a fold angle gradually reduced. In the course of gradually reducing the fold angle, a plurality of guide rolls through are pressed against transversely opposite side edge portions of the web. Immediately before the stage on which the web is completely folded in two, there are provided detector means adapted to detect actual positions of the respective side edge portions and swing rolls located upstream of these detector means adapted to change a crossing angle of the web with respect to a machine direction. Actuators interposed between the detector means and the swing guide rolls cause the swing guide rolls to swing and thereby to move the side edge portions toward predetermined positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.