Metal fusion bonding – Including means to apply flux or filler to work or applicator – Gaseous flux
Patent
1990-10-02
1992-06-30
Heinrich, Samuel M.
Metal fusion bonding
Including means to apply flux or filler to work or applicator
Gaseous flux
228 43, 228219, 432 64, B23K 1008, B23K 300, F24F 900
Patent
active
051255561
ABSTRACT:
An infrared soldering machine has an inert gas atmosphere to prevent oxidation of the solder. Heaters positioned within the machine housing above a conveyor have through apertures and fans direct inert gas down through the heaters onto the conveyor. The forced convection assists in maintaining uniform temperature across the conveyor. In order to prevent leakage of ambient air into the housing where the fan shafts protrude for connection to electric motors, a gas seal is provided at each fan shaft. The seal extends between two spaced bearings rotatably securing the fan shaft. Each electric motor is mounted away from the heat of the machine and is connected to the respective fan shaft by means of a belt drive. A novel gas curtain, which may be clamped at different angles, improves the gas seal at entry and exit locations of the conveyor.
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patent: 4898319 (1990-02-01), Williams
patent: 5031818 (1991-07-01), Gieskes
Electrovert Ltd.
Heinrich Samuel M.
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