Fres-Co System USA, Inc.

Other

Daniel R Wigman

Ronald Karl Long

Jeffrey Scott Beer

Sergio Muniz

Travis Blose

Douglas J Overby

A flexible package with a one-way, pressure-equalizing or degassing valve and method of making the same is provided. The package includes a tortuous path preventing particulate materials, e.g., fine powders, from clogging or interfering with opening and closing of said valve. The package includes a heat seal including discontinuities or gaps which defines a tortuous path between the valve and the compartment within the package in which the particulate material is located, allowing air and internal gases trapped in the package to escape through the valve while preventing fine powders, dust and particulate from reaching the valve body by trapping or collecting them in the tortuous path.

Flexible packages with clog resistant degassing valve and methods of making the same

Flexible gusseted bag

A hermetic package for fine particulate material. The package is arranged to be filled and vacuumized to hold the fine particulate material therein and isolated from the ambient atmosphere. The package, which may be in the form of a pouch or a gussetted packages, is formed of a flexible material to have at least a front and a rear panel. At least one degassing valve is mounted in at least one of the panels to enable gas within the interior of the package to vent to the ambient atmosphere. A filter sheet, e.g., a spun-bonded plastic, such as Tyvek.RTM., is secured to the interior of the package over the valve to prevent the fine particulate material within the package from entering into the valve and clogging it. The filter sheet may cover only a small portion of one of the panels of the package or may cover a major portion of that panel, or even cover substantially the entire interior of the package. The package includes a top portion forming a mouth, which is arranged to be opened, e.g., peeled or severed, in order to provide access to the particulate material within the interior of the package.

Filter bag with valve

A package having a hollow interior for holding material therein. The package is formed of flexible sheet material and comprises a pair of panels connected by respective side gusset folds, a mouth located between the side gusset folds and communicating with the interior of the package, and a pair of notches and associated seals. Each of the folds comprises a central fold edge interposed between a pair of outer fold edges and defining therebetween respective gusset sections which are subadjacent the respective panels. The mouth of the package is sealed to hold the material within the interior of the package isolated from the ambient atmosphere. Each notch is formed in a respective one of the outer fold edges and the panel and gusset section contiguous therewith. The seal is air-tight and surrounds the associated notch to join the panel and contiguous gusset section to each other to preclude air from entering into the interior of the package through the notch. The notches enable the package to be torn open therefrom to form a pouring spout through which free flowing grannular products can be poured at a controlled rate.

Gussetted flexible package with tear notch to form pour spout

Growing community of inventors

Harleysville, PA, United States of America

Daniel R Wigman