Hi Wade,
I developed such a machine for Western Electric (obviously some time ago). I
published on it and the references are:
Engelmaier, W., "Transverse Joulean Heated Soldering Tool for Mass
Terminations," Proc. Nepcon/West, Anaheim, CA, February 1979, pp. 228-235; and
Engelmaier, W., "Transverse Joulean Heated Double-Sided Reflow Soldering
Machine for Mass Terminations," Proc. Nepcon/West, Anaheim, CA, February
1981, pp. 333-339.
Worked like a charm and soldered both sides at once in about 10 seconds.

Werner Engelmaier
Engelmaier Associates, L.C.
Electronic Packaging, Interconnection and Reliability Consulting
7 Jasmine Run
Ormond Beach, FL  32174  USA
Phone: 904-437-8747, Fax: 904-437-8737
E-mail: [log in to unmask]

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################