The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2008
Filed:
Oct. 20, 2004
Peter March, Frankfurt am Main, DE;
Bernd Rudolph, Alzenau, DE;
Peter March, Frankfurt am Main, DE;
Bernd Rudolph, Alzenau, DE;
Abstract
The usual xenon radiation source in conventional weathering testers is replaced by UV light-emitting diodes (LEDs) (). These can be used to provide a good approximation of the UV component of the solar spectrum, in particular when different types of UV light-emitting diodes () with different emission characteristics are employed. Optionally, further light-emitting diodes in the visible spectral range may also be used in order to cover other parts of the solar spectrum. The light-emitting diodes () may be mounted on a flexible printed circuit board (), which may in turn be fitted on a tubular holding body (). The flexible printed circuit board carrying the light-emitting diodes may also be placed on other substrates () which are pliable in a geometrically stable way, so that that they can be arranged at a uniform distance from material samples with a particular surface topology, in order to obtain uniform exposure.