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:
Sep. 22, 2015
Filed:
Oct. 25, 2007
Shoichi Okazaki, Tokyo, JP;
Shoichi Okazaki, Tokyo, JP;
YOSHINO GYPSUM CO., LTD., Tokyo, JP;
Abstract
The invention provides a whetstone type of scoring device for production of gypsum boards which can accurately and stably form a groove of a constant depth on a sheet of paper for gypsum board liner, and which can prevent wear of a rotary blade and a backing block. The scoring device () for a gypsum board production machine () has the rotary blade () and the backing block (). The sheet () travels under tension over the block (), which abuts against the lower surface of the sheet. The block has an opening () immediately under the blade. The lower surface of the sheet is released downward by the opening. The sheet is ground by a blade edge () while being slightly bent downward within a range of the opening (within an intimate contact area of an angle β).