Paul A Graham

US Patent:

60564393, May 2, 2000

Filed:

Jan 28, 1999

Appl. No.:

9/238556

Inventors:

Paul H. Graham - Lansdale PA

Assignee:

Fres-co System USA, Inc. - Telford PA

International Classification:

B65D 3301

US Classification:

383103

Abstract:

A package including a degassing valve for holding a material, e. g. , a particulate material, within the package isolated from the ambient atmosphere. The degassing valve is mounted on the wall panel and basically comprises a cap, a base, and a flexible disk. The cap is a hollow cylindrical member from which three peripheral portions are cut away to form three equidistantly spaced peripheral outlet ports disposed above an uninterrupted ring-like portion of the cap. The base is a generally cup-shaped member having first portion arranged to be located and snap-fit within the cap member and which forms a valve seat. An inlet port extends to the valve. The disk is located on the valve seat and covering the inlet port but is movable with respect thereto. The inlet port of the valve is in communication with the interior of the package and the peripheral outlet ports are in communication with the ambient atmosphere, whereupon gas within the package is enabled to flow through the inlet port, under the disk member to cause at least a portion of the disk member to move off of the valve seat, and out through the outlet port to the ambient atmosphere. The disk may include at least one aperture so that the degassing valve is of the two-way type, instead of a one-way type.