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. 23, 1980
Filed:
Dec. 16, 1977
Applicant:
Inventor:
Ryoichi Namiki, Hino, JP;
Assignee:
Ricoh Company, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P / ; F28D / ;
U.S. Cl.
CPC ...
2915 / ; 165105 ; 2915 / ;
Abstract
A method of producing a heat pipe roller having a chamber for holding a heating medium therein is disclosed, wherein sealing means for sealing the heat pipe roller are connected to an upper end plate of the heat pipe roller through a hole formed in the upper end plate. The heat pipe roller containing a heating medium therein is heated at temperatures above the boiling point of the heating medium and finally the heat pipe roller is sealed by use of the sealing means after adjusting the degree of vacuum or pressure in the heat pipe roller to a predetermined degree.