Patent · US Expired

Method for treating material samples and apparatus for testing exposure to light and weathering

US5898816A · kind A · utility

8Cited by

6References

9Claims

0Family size

Assignee

Xenotest Gesellschaft fur die Herstellung von Materialprufgeraten mbH · DE

Inventors

Roland Heeger · Bruchköbel, DE
Arthur Schonlein · Gerolzhofen, DE
Bernd Rudolph · Forstern, DE
Peter March · Austin, US

Key dates

Filing date	Jan 19, 1998
Grant date	Apr 27, 1999
Priority date	—
Expiry date	Jan 19, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG01N17/004
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention concerns the ageing of material samples in the test enclosure f an apparatus for testing exposure to light and weathering, using visible light, UV light and medium- or long-wavelength IR radiation and with air circulation. In order to ensure reproducible test results, a value representing the surface temperature of the sample is measured by means of a temperature sensor and compared, at the input of a control unit, with a predefined reference temperature. In the event of a temperature difference, a control signal generated by the control unit adjusts the power supply to a separate IR radiant heater for medium- and long-wavelength IR radiation in such a way that the difference disappears in accordance with a predefined indicial response.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.