Means and method for hermetic bag and tube closures
United States Patent 2412862

Inventors:
Samuel, Bergstein
Publication Date:
12/17/1946
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Assignee:
Robert, Morris Bergstein
Frank, David Bergstein
Primary Class:
53/481
Other Classes:
53/373.600, 53/375.400, 493/308, 493/276, 493/274, 53/373.300
International Classes:
B65B51/02; B65B51/00