Abstract: A system for the thermal and/or liquid treatment of edge supported substrates, such as printed electronic circuit boards and hybrid circuits. The system includes an elongated tunnel treating chamber. The system includes a conveyor system comprised of a pair of lubricant-free tape conveyors supported for movement through the treating chamber on a plurality of spaced apart parallel pins extending laterally inwardly from a pair of parallel elongated rail tracks. A lip on the rail track is closely spaced from and partially overlies the tape conveyor. The lubricant-free tape conveyor is comprised of a closed loop flexible steel tape provided with a plurality of longitudinally spaced apart vertical tabs throughout its length. The tabs are in longitudinal alignment, spaced inwardly from the edges of the tape and provide lateral support for substrates suspended between a pair of conveyor tapes.

Abstract: A system for the thermal and/or liquid treatment of edge supported substrates, such as printed electronic circuit boards and hybrid circuits. The system includes an elongated tunnel treating chamber. The system includes a conveyor system comprised of a pair of lubricant-free tape conveyors supported for movement through the treating chamber on a pair of elongated tracks. The lubricant-free tape conveyor is comprised of a closed loop flexible steel tape provided with a plurality of longitudinally spaced apart vertical tabs throughout its length. The tabs are in longitudinal alignment, spaced inwardly from the edges of the tape and provide lateral support for substrates suspended between a pair of conveyor tapes.

Abstract: A system for the thermal and/or liquid treatment of edge supported substrates, such as printed electronic circuit boards and hybrid circuits. The system includes an elongated tunnel treating chamber. The system includes a conveyor system comprised of a pair of lubricant-free chain conveyors supported for movement through the treating chamber on a pair of elongated tracks. The lubricant-free conveyor is comprised of a plurality of successively interconnected wire links each comprising a horizontal member in engagement with the top surface of the track, a pair of spaced apart generally vertical members spaced from the horizontal member and connected thereto and in loose engagement with the sides of the track, and an integral substrate-supporting pin extending outwardly from one of the vertical members. The pins of each conveyor are directed inwardly toward each other to support a substrate therebetween by its edges.