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. 22, 2015
Filed:
May. 16, 2014
Alps Electric Co., Ltd., Tokyo, JP;
Heishiro Fudo, Miyagi-ken, JP;
Tomoko Wauke, Miyagi-ken, JP;
Eihin Setsu, Miyagi-ken, JP;
Hirotoshi Terao, Miyagi-ken, JP;
Kazuma Kobashi, Miyagi-ken, JP;
Eiji Okada, Miyagi-ken, JP;
Susumu Nakajima, Miyagi-ken, JP;
Mikio Onodera, Miyagi-ken, JP;
ALPS ELECTRIC CO., LTD., Tokyo, JP;
Abstract
A heater for fixing devices includes a glass substrate, a heating element, electrode patterns connected to the heating element, a first protective layer, and a second protective layer. The glass substrate is made of an alkali-free glass. The first protective layer is formed by firing a mixture of a first glass powder and a first filler. The first glass powder contains no alkali metal oxide and has a lower softening point than the glass substrate. The first filler has a lower thermal expansion coefficient than the alkali-free glass for the glass substrate. The second protective layer is made of a material that does not contain the first filler contained in the first protective layer.