The present utility model refers to a bag or a bundle-type packaging suitable to contain cement or other similar material, consisting of at least one sheet of paper wherein the external sides of said sheets are coated with at least one layer of hydrophobic paint.

This paint transfers water-repellent characteristics to the paper; in this way, both the transmission of moisture/water vapor (WVTR) and the absorption of water (COBB) are significantly reduced.

In fact, thanks to at least one layer of paint applied externally to the sheets of paper that make up the bag, the water is not retained by the paper, but slips away due to the high surface tension present on the treated paper.

The barrier effect is thus increased compared to that obtainable from standard bags known in the art, thus guaranteeing the product contained inside the bag a high protection from humidity, even in the absence of intermediate polythene sheets in the manufacture of the bag and, consequently, improving the shelf life of the product contained inside the bag.

The bag achieves these results even though it has no intermediate plastic layers.

The present invention relates to an improved perforated refuse bag inoperable of retaining fluids and therefore resistant to conducting a controlled fermentation process within the bag. Embodiments of the present invention provides a plastic bag with perforations of a particular shape, size, and distribution that renders the bag inoperable of retaining liquids but still operable of holding refuse without rupturing. The combination of the bag composition and the particular arrangement of perforations provides a durable low-cost refuse bag operable of supporting a substantial load without rupturing and inoperable of conducting a controlled fermentation process.

The present invention relates to an improved perforated refuse bag inoperable of retaining fluids and therefore resistant to conducting a controlled fermentation process within the bag. Embodiments of the present invention provides a plastic bag with perforations of a particular shape, size, and distribution that renders the bag inoperable of retaining liquids but still operable of holding refuse without rupturing. The combination of the bag composition and the particular arrangement of perforations provides a durable low-cost refuse bag operable of supporting a substantial load without rupturing and inoperable of conducting a controlled fermentation process.

One-way pressure relief valves with wetting fluid reservoirs are disclosed. Valves of the types described herein may be applied to a product package, for example a package containing dry roasted coffee, to allow gas to escape from the package while preventing entry of ambient air into the package. A wetting fluid is provided within the valve to facilitate formation of the seal blocking entry of ambient air through the valve and into the product package. The wetting fluid reservoirs hold wetting fluid to limit or prevent leakage of the wetting fluid from the valve providing benefits such as improved application of the valves to the packages, improved retention of the valves to the packages, and appearance improvements resulting from avoidance of leakage of wetting fluid onto the valve and the package to which the valve is attached.

One-way pressure relief valves with wetting fluid reservoirs are disclosed. Valves of the types described herein may be applied to a product package, for example a package containing dry roasted coffee, to allow gas to escape from the package while preventing entry of ambient air into the package. A wetting fluid is provided within the valve to facilitate formation of the seal blocking entry of ambient air through the valve and into the product package. The wetting fluid reservoirs hold wetting fluid to limit or prevent leakage of the wetting fluid from the valve providing benefits such as improved application of the valves to the packages, improved retention of the valves to the packages, and appearance improvements resulting from avoidance of leakage of wetting fluid onto the valve and the package to which the valve is attached.

The disclosed packaging bags may include a flexible front sidewall and a flexible rear sidewall with at least a first closed edge, second closed edge, and third closed edge coupling the front sidewall to the rear sidewall. A perforation may be formed through the flexible front sidewall and the flexible rear sidewall along the first closed edge. The perforation may extend in a first segment from the first closed edge toward a central region of the packaging bag, in a second segment in a direction along the first closed edge, and in a third segment back to the first closed edge. The second segment may include at least one elongated ventilation slit. Various other related packaging bags and methods are also disclosed.

A storage bag (100) includes a main tube (102) extending from a first end to a second end and defining a first inner surface and outer surface. The main tube includes a first angled edge (128) and a second angled edge (132) extending from the first end of the main tube and forming a first angled interface. The storage bag also includes a port tube (104) extending from a first end to a second end and defining a second inner surface and outer surface. The second end of the port tube includes a third angled edge and a fourth angled edge extending from the second end of the port tube, forming a second angled interface. The second angled interface of the port tube is positioned over the first angled interface of the main tube. A portion of the port tube not overlapping the main tube is sealed to itself to form an angled drainage area (182).

A storage bag (100) includes a main tube (102) extending from a first end to a second end and defining a first inner surface and outer surface. The main tube includes a first angled edge (128) and a second angled edge (132) extending from the first end of the main tube and forming a first angled interface. The storage bag also includes a port tube (104) extending from a first end to a second end and defining a second inner surface and outer surface. The second end of the port tube includes a third angled edge and a fourth angled edge extending from the second end of the port tube, forming a second angled interface. The second angled interface of the port tube is positioned over the first angled interface of the main tube. A portion of the port tube not overlapping the main tube is sealed to itself to form an angled drainage area (182).

A container includes a bag, which has an internal space to accommodate contents and a first opening, and a fastener to open and close the first opening. The bag places contents into the internal space through the first opening. The bag also has a second opening and also places contents into the internal space through the second opening.

A container includes a bag, which has an internal space to accommodate contents and a first opening, and a fastener to open and close the first opening. The bag places contents into the internal space through the first opening. The bag also has a second opening and also places contents into the internal space through the second opening.