Headbox tube bank apparatus and method of directing flow therethrough
US5183537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A headbox tube bank apparatus and method of directing flow through same is disclosed for permitting the flow therethrough of stock in a papermaking machine. The apparatus includes a tube bank frame for rigidly supporting the tube bank, the frame defining a plurality of openings. A plurality of tubes cooperate with the frame such that each tube extends through and is supported by an opening. Each tube has an upstream and a downstream portion, the upstream portion defining an internal cross-machine direction section of substantially circular configuration for maximizing the velocity of the stock through the tube. The downstream portion includes a first and a second end with the first end being connected to the upstream portion and the second end defining a downstream orifice having a flow area in a cross-machine direction which is of rectangular configuration for progressively improving the uniformity, stability, cleanliness, and for lowering turbulence of the stock during flow thereof through the downstream portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.