Apparatus for expanding the width of preformed fibrous webs
US4219911A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | May 22, 1998 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H1/74
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention is directed to apparatus for expanding the width of preformed fibrous webs. Fibrous webs having fibers oriented in their lengthwise direction can be widened by this apparatus and this orientation is still maintained in the widened web. The apparatus functions by feeding the web to a blade edge lying at an angle to the lengthwise direction, abruptly changing the direction of travel of the web at the edge from the lengthwise direction to a second direction, and turning the web fibers in the second direction while expanding the width of the web. The profile of fibrous webs, i.e., the thickness, uniformity, weight and fiber density, across its width can be changed and controlled according to the apparatus disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.