Method and apparatus for determining the contact angle of liquid droplets on curved substrate surfaces
US5137352A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Feb 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2013/0241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus adapted for the rapid, accurate and repeatable determination of contact angles of liquid droplets applied to curved substrate surfaces. The apparatus includes a support upon which an article may be mounted with the curved substrate surface facing downwardly, a pipette having a discharge end below the downwardly facing curved surface and operable for transferring a predetermined relatively small droplet of a test liquid onto the downwardly facing curved surface, and a contact angle measuring device which includes a lamp for directing a light beam across the suspended droplet such that an image thereof is projected onto a screen from which the contact angle is measurable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.