Measurement of absorbency characteristics of absorbent structures
US3952584A · kind A · utility
Inventor
Key dates
| Filing date | Mar 4, 1975 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Mar 4, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method is provided for simultaneously measuring the liquid absorbent capacity and the wetting rate of absorbent structures as a function of volume and time. These absorbency characteristics can be measured at a zero or a negative hydrostatic head, where the absorbency characteristics are due only to the liquid drawing power of the absorbent structure, or at a positive hydrostatic head. The device comprises: a liquid reservoir for holding a column of liquid where the reservoir has an opening at its bottom and is closed at the top; an orifice plate having a liquid delivery orifice which is in flow communication with the opening in the reservoir through a flow communication means; an air bleed orifice in the liquid reservoir between the top and bottom thereof and in fluid communication with the atmosphere; and a means for adjusting the relative heights of the air bleed orifice to the orifice plate. When the liquid is introduced into the reservoir and the flow communication means, the relative height of the orifice plate to the air bleed orifice may be adjusted so that there is no fluid driving force acting to cause liquid to flow through the liquid delivery orifice. W…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.