Apparatus for accurately measuring the freeness of paper stock flowing in a feed pipe
US4114427A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1976 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Mar 5, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2506
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for accurately measuring the freeness of paper stock in a short time is disclosed. The apparatus comprises a pump and plunger which take a sample of stock from a flowline or a place in which paper stock is prepared and places the sample in an agitation tank. A water supply dilutes the sample in the agitation tank to a predetermined consistency and a first pressurized air supply agitates the diluted sample so that fibrous material in the stock is evenly dispersed in the water. The agitation tank is closed to the atmosphere and a second pressurized air supply provides a pressure in the tank for draining the liquid from the sample through a screen. The liquid which passes through the screen is delivered to a measuring cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.