Papermaking apparatus and multi-layer paper forming apparatus
US5456803A · kind A · utility
5Cited by
9References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Dec 1, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F9/003
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A papermaking apparatus that can form a paper web having a good fiber formation is disclosed. A plurality of vertically adjustable forming rolls are provided on the top surface of an endless felt couch between a lead-in roll and a couch roll, and stationary forming bars are provided on the bottom surface of a wire screen. The endless felt couch and the wire screen, between which paper stock is interposed, are caused to move by undulation to generate pulses, which in turn apply shear force onto the paper web to dewater the paper web while facilitating fiber dispersion on the paper web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.