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:
May. 13, 1980
Filed:
Jul. 06, 1978
Willy Jakobs, Cologne, DE;
Abstract
An apparatus is disclosed for the determination of particle size distribution of a granular material within a measuring channel. The measuring channel has radiation permeable side walls and a granular material is spread out through the measuring channel by a sifting air current in accordance with grain size. A scanning apparatus is movable external to the measuring channel and includes a frame on which is mounted a radiation transmitter and a radiation receiver lying opposite the transmitter. A measuring beam from the transmitter scans through a measuring zone of the measuring channel. The measuring frame is of closed-loop construction and surrounds the measurement channel. With such construction, the frame is not subject to vibration particularly when reciprocated in order to cause scanning movement of the measuring beam.