Patent ID: 6378753
Filing Date: 2002-04-30
Classification: B23K

Abstract:
A gas distribution system, which can be connected to a gas supply, for admitting and distributing a non-oxidizing gas into a casing which covers at least one solder container and through which printed circuit boards are transported and, during their transport, are brought into contact with a solder wave, wherein the gas distribution system has at least one gas distributor arranged above and at least one gas distributor arranged below the printed circuit boards, both gas distributors being provided with flow means which form displacement-gas cushions, that are distributed homogeneously over exit areas that are directed towards the solder container, wherein the gas distributors have a first expansion chamber which is connected to the gas supply and is connected via at least one opening to at least one further expansion chamber in which the exit areas for the displacement-gas cushions are provided, and said further expansion chamber having a greater volume than said first expansion chamber.