Tunnel for treating an element in a gas environment...

B - Operations – Transporting – 23 – K

Patent

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Details

CPC

113/80, 113/89

IPC codes

B23K 1/20 (2006.01)

Type

Patent

Patent number

CA 2016718

Description

ABSTRACT An apparatus and a process are disclosed for treating an element with a reducing gas. The apparatus permits wiring boards and the like to be soldered in a reducing gas atmosphere such as hydrogen thus avoiding the necessity of fluxing. A hydrogen gas generator provides an instant source of gas and can be shut off instantly and no gas is stored. The process comprises the steps of conveying the element through an entry into an enclosed zone, the entry containing at least one entry fluid barrier curtain wherein the fluid is an inert gas, filling the enclosed zone with the reducing gas, heating the element in the zone, conveying the element from the enclosed zone through an exit containing at least one exit fluid barrier curtain, wherein the fluid is an inert gas, and burning off excess reducing gas above the entry and exit fluid barrier curtains.

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