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:
Sep. 17, 1991
Filed:
Dec. 08, 1989
Applicant:
Inventors:
Donald A Elliott, Brossard, CA;
Vivian G Power, Lambert, CA;
Assignee:
Electrovert Ltd., Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ; B23K / ; B23K / ; H05K / ;
U.S. Cl.
CPC ...
2281801 ; 228220 ; 228262 ; 228 37 ;
Abstract
A tunnel for fluxless soldering, is a straight linear tunnel which contains vibrating means to vibrate a solder wave and a non-explosive gas atmosphere. The gas atmosphere includes a small portion of hydrogen or other gaseous reducing agent, sufficient to achieve a fluxing action. A process for soldering an element comprises the steps of conveying the element through a tunnel containing a non-explosive gas atmosphere substantially excluding oxygen, heating the element in the tunnel, soldering the element, and retaining the element in the gas atmosphere of the tunnel until solder on the element has solidified.