High temperature platens

Claim 2

A high temperature platen adapted to be used with a press comprising: a face plate of a relatively good heat conducting ceramic having a plurality of bores therein; a subplate of a relatively good insulating ceramic having parallel planar surfaces and disposed adjacent said face plate; a heat sink disposed adjacent said subplate; means for mounting said platen on said press disposed adjacent said heat sink; and ceramic resistance heater rods disposed in the bores of said face plate supported by insulation supports disposed between each of said rods and the wall of its respective bore.

Claim 3

The platen of claim 1 wherein: said subplate includes at least one first bore disposed parallel to its parallel planar surfaces and at least one second bore communicating with said first bore and opening at one planar surface thereof, at least one threaded nut disposed in said first bore, and at least one bolt extending through said second bore and said heat sink and engaging said nut so that said subplate is fixed to said heat sink.

Claim 4

The platen of claim 2 wherein: a mounting plate is disposed between said heat sink and said press and is adapted to be removably mounted to said press, a plurality of brackets disposed around said platen and each engaging said mounting plate at one end and said face plate at the other end.

Claim 5

The platen of claim 3 wherein: a heat insulating frame is disposed around said face plate, said frame having means permitting engagement with said brackets.

Claim 6

A high temperature platen adapted to be used with a press, said platen comprising: a metallic mounting plate adapted to be removably mounted to said press, a heat sink including two metallic sheets separated by peripherally displaced bars to form an enclosure therebetween, suitable spacer blocks disposed within the enclosure to keep the two apart and means for flowing a cooling liquid through said enclosure, said heat sink being disposed on one side of said mounting plate, a subplate made of a heat insulation ceramic and having parallel planar surfaces disposed on the other side of said heat sink from said mounting plate, means for removably joining said mounting plate, said heat sink and said subplate together, a face plate having a work contacting surface and including means for heating disposed next to said subplate opposite said heat sink, a heat insulating frame disposed around said face plate, and means for fixing said frame and said face plate to said mounting plate.

Claim 7

A high temperature platen adapted to be used with a press, said platen comprising: a metallic mounting plate adapted to be removably mounted to said press, a heat sink including two metallic sheets separated by peripherally displaced bars to form an enclosure therebetween, suitable spacer blocks disposed within the enclosure to keep the two apart and means for flowing a cooling liquid through said enclosure, said heat sink being disposed on one side of said mounting plate, a subplate made of a heat insulation ceramic and having parallel planar surfaces disposed on the other side of said heat sink from said mounting plate, means for removably joining said mounting plate, said heat sink and said subplate together, a face plate having a work contacting surface and including means for heating disposed next to said subplate opposite said heat sink, a heat insulating frame disposed around said face plate, and means for fixing said frame and said face plate to said mounting plate.

Claim 8

The platen of claim 5 wherein: said face plate includes a plurality of bores disposed parallel to its work contacting surface, said means for heating includes electrical resistance heater rods disposed in said bores.

Claim 9

The platen of claim 6 wherein: said face plate is made of a ceramic having relatively good heat conducting characteristics, said rods are made of a ceramic having relatively good electrical conductivity characteristics, electrical insulation supports are disposed between said rods and the wall of said bores in said face plate, and said subplate has opposite parallel planar surfaces and is made of a ceramic having relatively good heat insulation characteristics.

Claim 10

The platen of claim 7 wherein said mounting means includes: said subplate includes at least one first bore disposed parallel to its parallel planar surfaces and at least one second bore communicating with said first bore and opening at one planar surface thereof, at least one threaded nut disposed in said first bore, and at least one bolt extending through said second bore, said heat sink and said mounting pLate for engaging said nut so that said subplate is fixed to said heat sink and said mounting plate.