Headbox apparatus with stock dilution conduits for basis weight control
US5196091A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Oct 29, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A headbox apparatus is disclosed for ejecting stock onto a forming wire for forming a web. The apparatus includes a housing which is connected to a pressurized source of the stock. The housing defines a tapered inlet for the flow therethrough of the stock. The tube bank has an upstream and a downstream end with the upstream end being connected to the tapered inlet such that the stock flows at a substantially constant flow rate through the inlet and through the upstream end of the tube bank to the downstream end of the tube bank. The tube bank includes a plurality of tubes for the flow therethrough of the stock. A member defines a slice chamber which has an upstream and a downstream extremity. The upstream extremity is connected to the downstream end of the tube bank, and the downstream extremity is disposed adjacent to the forming wire. The arrangement is such that the stock flows through the downstream end of the tube bank and through the upstream extremity of the slice chamber so that the stock is ejected from the downstream extremity of the slice chamber onto the forming wire. A plurality of supply conduits are connected to the upstream end of the tube back with each supply cond…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.