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. 17, 2012
Filed:
Jul. 26, 2007
Tetsuya Yuki, Kanonji, JP;
Yoshiaki Hirose, Kanonji, JP;
Tetsuya Yuki, Kanonji, JP;
Yoshiaki Hirose, Kanonji, JP;
Toyo Tanso Co., Ltd., Osaka-shi, JP;
Abstract
There is provided a mold release sheet () disposed between silica powder M and an inner face of an outer memberof a mold and made of expanded graphite. The mold release sheet has a gas permeability represented by the following equation (1) from 5.0×10cm/s to 1.0×10cm/s. Gas permeability=Q·L/(ΔP·A) (1). In this equation (1), Q is the gas flow rate (Pa·cm/s), ΔP is the pressure difference (Pa) between two chambers, A is the gas transmission area (cm) of the mold release sheet, which is the area of a passage that allows the two chambers to communicate with each other, and L is the thickness (cm) of the mold release sheet.