Device and method for longitudinally folding a stack of webs
US6740021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Dec 28, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K2010/428
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Folding apparatus and systems are described for providing multi-folded products utilizing a folding board having at least one pressurized nip positioned proximate the folding operation. A folded product is directed through a first pressurized nip, comprising a roller and a first surface of a second folding board, positioned upstream of the folding operation and a second pressurized nip, comprising a roller and a second surface of the folding board, positioned downstream of the folding operation. Positioning pressurized nips proximate the folding operation improves the integrity of the folds created within the product and also creates distinct, uniformly oriented fold lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.