CONTAINER SEALING DEVICE, CONTAINER AND METHOD OF CONTAINER SEALING Russian patent published in 2001 - IPC

FIELD: packing. SUBSTANCE: container sealing device has sheet consisting of at least three layers: welded layer pressed and welded to edge of hole with formation of steam, outer layer forming a barrier and intermediate gluing layer. Welded joint between welded layer seam and edge of hole features tear-off strength greater than adhesive force between welded layer and gluing layer. At first opening of hole, welded seam remains in place around edge of hole and separates from the rest of welded layer and from gluing layer. Owing to the fact that gluing layer opens at section of seam, repeated sealed closing of container is provided by pressing indicated open section to seam. EFFECT: possibility of repeated sealing of container. 28 cl, 8 dwg