System and process for reducing the caliper of paper webs
US6676807B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Apr 8, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21G1/006
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for increasing the tactile properties of a base web without adversely affecting the strength of the web is disclosed. In general, the process includes the steps of placing a base web in between a first moving conveyor and a second moving conveyor. The conveyors are then wrapped around a shear inducing roll which creates shear forces that act upon the base web. The shear inducing roll typically has a relatively small diameter. In some applications, more than one shear inducing roll may be incorporated into the system. In other applications, the shear inducing roll can also be a nip roll for decreasing the caliper of the base web. The shear inducing roll may be stationary, as in the form of a stationary shoe with a convex edge, or may rotate. In one embodiment, the shear inducing roll can rotate on an air bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.