Method and apparatus for monitoring amount of a substance applied to a fabric
US4066898A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Apr 12, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method based on X-ray transmission is disclosed for determining the thickness, or equivalently, the weight per unit area, of a substance containing atoms of a non-radioactive element of atomic number of 11 or greater applied to a fabric, such as a calcium- and/or aluminum-containing latex coating on a carpet. The apparatus employs a source of radiation which emits a single predominant X-ray within the range of 12-19 Kev, such as zirconium which fluoresces at 16 Kev when bombarded with 60 Kev radiation from americium-241; a detector sensitive to the radiation emitted and having resolution at least as sharp as about 20 percent, such as a Kr/CO.sub.2 proportional counter; and a suitable electronic circuit to convert the charge pulse output of the detector to a readout signal related to the amount of the substance on the fabric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.