Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Presses or press platen structures – per se
Patent
1991-07-30
1993-07-20
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Presses or press platen structures, per se
1565831, 1565835, 219 1055A, 219 1055F, 333137, B30B 500, B30B 1534, H05B 664
Patent
active
052289478
ABSTRACT:
A system for the simultaneous application of pressure and microwaves to a thick mat of curable assemblies. As the curable assemblies are conveyed through a belt press, microwaves are applied to them through an adjacent, rapidly expanding applicator horn. A microwave-transparent ceramic dam or window across the outlet of the horn blocks the compressed assemblies from entering the horn. To minimize any heat cracking of the window it is formed of a number of pieces. These pieces are held in place at the horn outlet by one or more fins secured within the horn and extending into the window. The fins extend across the interior of the horn and divide it into a number of different microwave paths. The ceramic window pieces at the ends of the paths are carefully shaped, with a cylindrical rear surface, to act as lenses and to act on the microwave energy from each of the different paths so that the microwaves from all of the paths are in phase at the product interface. Air is pumped through a serpentine path in the window to cool it and help prevent cracking thereof. Applicator horns having different heating patterns can be advantageously used at different locations along the press bed.
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Sells J.
Simmons David A.
Trus Joist MacMillan a Limited Partnership
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