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:
Jul. 21, 1992
Filed:
Sep. 17, 1991
Applicant:
Inventor:
Jong S Choi, Seoul, KR;
Assignee:
Samsung Electron Devices Co., Ltd., Kyungki, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
445 29 ; 445 36 ; 313270 ; 3133 / ;
Abstract
A process for manufacturing a dispenser cathode is disclosed, and the process comprises the steps of filling a porous base material into a storage tank, welding the storage tank to a cylindrical sleeve, installing a heater into the sleeve which has, a supporting face to be welded with the storage tank, an outside diameter which is larger than that of the storage tank, and an opening which is smaller than the outside diameter of the storage tank, wherein the heat transfer to the porous base material during the welding is prevented and the thermal efficiency is improved during the operation of the cathode so that a superior cathode characteristic is achieved.