Perforated rolled paper or nonwoven products with variable bonded length and method of manufacturing
US5562964A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Dec 14, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Improved detaching of perforated roll products of paper or nonwovens is achieved by selectively reducing strength of the sheet along the perforation line at the edges of the sheet. This is achieved by lowering the bonded length (the sum total of the distance between perforations) at the edges of the sheet relative to that within the central portion of the sheets. Greater bonded lengths in the middle of the sheet enable the sheet to pass through converting operations with minimal breaks, while having lower bonded lengths at the outer edges allows the user to more easily start a tear in the sheet at the perf line and reduce the number of "ears" left on the roll as a result of detaching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.