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:
Dec. 11, 2001
Filed:
Jan. 15, 1999
Yoshihiko Koiso, Hiratsuka, JP;
Naoto Wagatsuma, Hiratsuka, JP;
Yoshiki Matsumoto, Hiratsuka, JP;
Masayuki Fujisawa, Hiratsuka, JP;
Koichi Yata, Hiratsuka, JP;
Kohshi Ochi, Hiratsuka, JP;
Japan Pionics Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a measuring apparatus and method for measuring the quantity of ventilation, whereby the quantity of ventilation correlates to the heating characteristics. [The present invention is also] able to measure the quantity of ventilation of a gas permeable packing material used in heating packets in a short period of time, regardless of the type or pore diameter of the packing material. The present invention provides heating packets displaying stable heating characteristics. In the present invention, one surface of a gas permeable packing material is exposed to the atmosphere, while the opposite surface is scavenged with a carrier gas which does not include oxygen. The present invention measures the oxygen diffusing capacity, [as the diffusion of oxygen] from the atmosphere through the gas permeable packing material, by measuring the concentration of oxygen in the carrier gas after scavenging. Also, the present invention provides body, pocket, and shoe heating packets wherein the quantity of ventilation is regulated by the oxygen diffusing capacity.