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:
Jan. 22, 2002
Filed:
Oct. 13, 1999
Etsuro Hirai, Hiroshima, JP;
Takumi Furuya, Hiroshima, JP;
Masato Saka, Hiroshima, JP;
Nobuyuki Taniguchi, Hiroshima, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
An acid pickling tank is filled with an acid liquid L, and a lid is attached to the acid pickling tank . A central part of the lid is depressed downwards to form a covering portion . The covering portion is located at a lower position than the liquid level of the acid liquid L in the acid pickling tank to cover a free surface of the acid liquid L. Immersion guide rolls to are provided on the covering portion , support blocks to are provided at the bottom of the acid pickling tank , and skids to are provided on the support blocks to via a bottom plate . Thus, the free surface of the acid liquid L in the acid pickling tank is decreased to suppress a loss of the acid, and prevent an overflow of the acid liquid L to the outside of the tank, thereby making acid pickling of the strip steel plate S efficient.