Microwavable bag with valve and method for the fabrication thereof

US8608379B2 · kind B2 · utility

Assignee

• MONDI AG · AT

Inventors

• Gyula Madai · Budapest, HU
• Christian Caro · Le Pont-de-Beauvoisin, FR
• Thomas H. Fischer · Wenden, DE
• Franz Scheidl · Deutsch-Wagram, AT

Key dates

• Filing date: Apr 20, 2009
• Grant date: Dec 17, 2013
• Expiry date: Sep 4, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D81/3461
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In a reclosable bag (20) a zipper (Z) is provided on the inner surfaces (50) of the plastic film and the two parts of the zipper (Z) are fixed on the opposite inner surfaces (50) of the bag (20), wherein the zipper (Z) is connected to the inner surface (50) of the plastic film in such a manner that between the welded regions (12, 14) between the zipper (Z) and the inner surface (50) of the plastic film, recesses (15, 13) are left free in the longitudinal direction of the zipper (Z) to form a seal-free longitudinal channel and in the transverse direction of the zipper (Z) to produce free air or steam passage openings at defined distances between the zipper (Z) and the inner surface (50), through which openings a passage of steam is possible, wherein ends of the openings facing the interior (60) of the bag (20) are larger than ends of the openings facing the exterior (70) of the bag (20).