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. 17, 1992
Filed:
Jan. 14, 1991
Mitsuhiko Nakagawa, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A feeding device having a hopper for storing and feeding a material having a low flowability such as powder, fibers or a mixture thereof. Comb-shaped obstruction plates are provided at the outlet side of the hopper so as to be slidable toward and away from each other to close and open the outlet opening. The slidable obstruction plates may be replaced with a single non-slidable plate having a plurality of openings. When in a stationary state, the material is prevented from dropping due to friction between it and the obstruction plate. The hopper may have its outlet opening elongated in one direction, with the area of the outlet opening being larger than half the area of the inlet opening.