Special receptacle or package – For plate or sheet – Fragile or sensitive
Patent
1975-01-20
1976-05-25
Dixson, Jr., William T.
Special receptacle or package
For plate or sheet
Fragile or sensitive
150 9, 206808, 250475, 229 625, B81D 8120, B03B 4118
Patent
active
039586936
ABSTRACT:
An opaque vinyl envelope having facing polished inner surfaces and an open edge into which an intensifier screen and X-ray film are inserted. The other three edges are completely sealed except for a valve at one edge. Reinforcing strips are attached along the open edge. The three sealed edges of the envelope are heat sealed without pressure to eliminate an internal bead and minimize leakage along the bead when the open edge is closed and the envelope evacuated. An insert that has a relatively rough surface or is pourous assures full evacuation.
REFERENCES:
patent: 2371843 (1945-03-01), Powers
patent: 2764859 (1956-10-01), Hanselmann
patent: 3233101 (1966-02-01), Forsyth
Dixson, Jr. William T.
E-Z-EM Company Inc.
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