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US 4,538,757 AGranted
Wave soldering in a reducing atmosphere
AssigneeMotorola, Inc.
InventorBary R. Bertiger
Life of this patent
Estimating the term…
Abstract
Wave soldering is accomplished in an enclosure having an atmosphere which is substantially free of oxygen and which provides a fluxing action due to the presence of a gaseous reducing agent. A conveyor carries articles to be soldered through the enclosure by means of an entrance and exit which are provided with gas curtains to inhibit atmosphere exchange with the ambient air.
Claims7
A wave soldering apparatus comprising:
- an enclosure having an entrance and an exit;
- conveyor means for carrying articles to be soldered through said enclosure, said conveyor means passing through said entrance and exit;
- wave soldering means inside said enclosure for soldering said articles on said conveyor means;
- atmosphere supply means coupled to said enclosure for maintaining a reducing, non-explosive and oxygen poor atmosphere and providing a fluxing action inside said enclosure;
- vent means for venting gases from said enclosure;
- and
- burn-off means for burning a flammable portion of said gases.
4 more elements
A method of wave soldering comprising the steps of:
- enclosing a wave soldering apparatus in an enclosure;
- providing an atmosphere in said enclosure which substantially precludes the presence of oxygen and which provides a flexing action;
- moving articles to be soldered through said enclosure and performing a wave soldering operation therein
- venting said gases from said enclosure;
- and
- burning off a flammable portion of said vented gases.
3 more elements
Dependencies are inferred from the claim text.