Patent ID: 7794674

Claim:
A vacuum sublimation device for effecting a vapor from a crude material being heated and condensing the vapor to a purified solid material by cooling, the device comprising: a collector having an inner wall, wherein the inner wall of the collector has a first diameter at a proximal end of the collector and has a second diameter at a distal end of the collector, the first diameter being less than the second diameter, and wherein a portion of the inner wall has a frusto-conical design; a vapor director cartridge for holding the crude material; a cartridge-holding member designed to receive and hold the vapor director cartridge, the cartridge-holding member having a proximal end adapted for connection to the distal end of the collector and having a distal end adapted to receive the vapor director cartridge; and a coupler mechanism to sealably join the collector and the cartridge-holding member, wherein the collector and the cartridge-holding member are compressively and sealably joined through combination of a bushing, a seal, the distal end of the collector, and the proximal end of the cartridge-holding member, wherein the seal is uniformly compressed through a screw-driven motion of the bushing.