Method for manufacture of smooth and glossy papers and apparatus
US5127168A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | May 7, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and a machine are described for drying of fibrous web, especially suitable for high speed machines producing printing papers. High drying rates are obtained by subsequently pressing the two surfaces of wet web onto two large diameter dryer cylinders heated to between 100.degree. and 150.degree. C. In the first nip, the web is pressed on the dryer cylinder by a felted press roll, while and unfelted smooth roll is used to press the web on the second dryer. Drying rates obtained when practicing the invention are substantially greater than those found in conventional dryer sections. The product obtained according to this method is 30% stronger than the conventionally dried uncalendered paper, and without calendering has a smoothness and gloss similar to those of calendered conventional papers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.