Western Electric Company, Inc.

George Michael Wenger

Tze Yao Chu

Peter F Lilienthal, Ii

Edward J March

Yogesh Jaluria

A flux filtration system (10) for removing rosin flux from a heat transfer liquid (14). The flux and heat transfer liquid (14) on an article (17) that has been condensation soldered is drained into a pan (13) located within a condensation soldering facility (11). The pan (13) diverts the liquid-flux mixture from a boiling reservoir of the liquid (14) in the lower portion of the facility (11). The liquid-flux mixture drained during a plurality of batch soldering operations is accumulated in a coarse flux filter (21). Periodically the filter (21) outpulses the coarsely filtered material sequentially through a heat exchanger (23), a fine flux filter (24), a preheater (28) and is then returned to the reservoir in the facility (11). When the liquid-flux mixture is not being outpulsed from the filter (21), the liquid (14) from the reservoir flows into the heat exchanger (23) and passes through the remainder of the filtration system (10) to maintain a flow therethrough to clean the system and prevent buildup of flux within the system (10).

Rosin flux filtration system

This disclosure is directed to maintaining a blanket of secondary vapor intermediate a hot primary vapor and the atmosphere, in a condensation heating facility, to prevent losses of the primary vapor to the atmosphere. A secondary liquid is transported through the secondary vapor into the hot primary vapors where the secondary liquid is vaporized to supplement the secondary vapor.

Apparatus for maintaining a vapor blanket in a condensation heating

Method for maintaining a vapor blanket in a condensation heating facility

Articles are heated in a condensation heat transfer facility to effect soldering thereof by transporting said articles into a body of hot saturated vapor within the facility. The hot saturated vapor condenses on, and gives up latent heat of vaporization to, the articles to effect solder reflow. The articles are subsequently quenched in a liquid prior to the withdrawal of the articles from the facility.

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Franklin Township, NJ, United States of America

George Michael Wenger