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Patent Application Titled: Coffee Bag Vent: Published Online

(Life Science Weekly)

According to news reporting originating from Washington, D.C., by NewsRx journalists, a patent application by the inventor Klann, Kenneth ( Grant, MN), filed on April 20, 2017, was made available online on November 16, 2017 (see also Patents).

No assignee for this patent application has been made.

Reporters obtained the following quote from the background information supplied by the inventors: “Roasted coffee creates outflow of gas after its roasting. For example, 1 kg of fresh roasted coffee bean could generate about 10 liters of CO.sub.2 gas at a decreasing rate from the time of roasting. It can be important to package the coffee in a way that keeps its freshness while compensating for this gas generation.

“A packaging film that is a high barrier to oxygen and moisture is typically used in packaging to preserve the coffee from degrading. An airtight flexible package would accumulate CO.sub.2 gas and build air pressure until the package ruptures. A common solution in use today is to install a 3 piece molded plastic valve that is welded to the interior of the coffee bag. The film material is mechanically breached within the circular valve weld to allow CO.sub.2 to escape though the valve and the breach in the film. The valve prevents air from entering the package but allows the CO.sub.2 to vent. A vent that allows CO.sub.2 to escape must also address the negative effects of allowing the fresh roasted aroma from escaping as well as allowing oxygen and moisture from entering the package which will degrade the sensory aspects of the coffee as well as shorten the shelf life. Other packaged items other than coffee also have an off gassing effect that would benefit from this type of vent, with or without a sealing film valve.”

In addition to obtaining background information on this patent application, NewsRx editors also obtained the inventor’s summary information for this patent application: “The present invention creates a package from a packaging film, and uses a laser etching process to create a vent in the package film itself. This eliminates the expensive 3 piece molded valve. As such, this offers a better and more economical solution to eliminate CO.sub.2 gas buildup.

“A laser etched or scored pattern on packaging film used in coffee bags is disclosed. This pattern can be used with or without an additional sealing film valve. This pattern provides a higher performance and lower cost packaging solution by releasing the buildup pressure caused by the emission of CO.sub.2 gas from fresh roasted coffee beans and grounds inside the coffee bag.”

For more information, see this patent application: Klann, Kenneth. Coffee Bag Vent. Filed April 20, 2017 and posted November 16, 2017. Patent URL:


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