Patent ID: 8404197

Claim:
A cup assembly for holding a sample to be analyzed spectrochemically, comprising: a tubular longitudinal member disposed symmetrically about a central axis, said tubular member extending longitudinally between a first end and a second end thereof, said tubular member defining an open-ended cylindrical inner cavity extending longitudinally between said first end and said second end, said tubular member including an indented peripheral flange defined at said second end, said indented peripheral flange having an inverted L shaped cross-section, the outer surface of said indented peripheral flange forming a series of substantially right angles; and an annular collar extending longitudinally between a first end and a second end thereof, with an internal peripheral flange defined at said first end of said annular collar, and an internal projection ring defined adjacent said internal peripheral flange, said internal peripheral flange having an inverted L shaped cross-section complementing said outer surface of said indented peripheral flange of said tubular member; wherein, upon assembly, a substantially thin film is interposed between said second end of said tubular member and said first end of said annular collar, said second end of said tubular member is inserted into said first end of said annular collar, and said film is retained between the tubular member and the collar in a series of three substantially right angles adjacent an interface between said indented peripheral flange and said internal peripheral flange, and an outer surface of said tubular member and said internal projection ring.