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. 26, 1994
Filed:
Jun. 07, 1993
Applicant:
Inventors:
David R Bell, Spring, TX (US);
Paul V Brownell, Houston, TX (US);
Assignee:
Compaq Computer Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228105 ; 228223 ;
Abstract
The invention provides a method that can be used online in a continuous printed circuit soldering process to measure and control the composition of soldering fluxes, in particular low-solids fluxes that utilize a solvent with a specific gravity close to the specific gravity of the flux composition. Samples of the flux are analyzed by ultra-violet absorption to determine solvent content and, based on this analysis, make up solvent is added to the flux composition to maintain a steady state composition.