Container made from a laminate of fiber layers
AssigneeVan Leer Verpackungen GmbH
InventorsNorbert E. A. Junge, Gerrit Kraan
Life of this patent
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Abstract
The invention relates to a container made from a plurality of fiber layers, preferably from craft paper which fiber layers of wall (1) and bottom (2) are interconnected by a hot meltable adhesive. At the location of the connection incisions (14) are made in the wall which extend parallel to the axis of the container and have a cutting plane (14) extending at an acute angle (.alpha.) with the respective tangential plane (167). At the inner side of the lips (13) obtained in this way an adhesive is applied in hot conditions at least at the folding line (8) and only thereafter the lips (13) are folded. The container can have an overhead lid (4), the lid body (5) and disc (7) being made in a corresponding way.
Claims4
In a container having an axis, at least one wall member, and a flat bottom member, said at least one wall member and said flat bottom member each comprising a plurality of fiber layers, and in particular a plurality of layers of kraft paper, said at least one wall member comprising a bottom portion bounded by a folding line, and lips formed in said bottom portion and adapted to be folded at said folding line and adhered to said flat bottom member to form a connection between said wall member and said bottom member, the improvement wherein
- a hot meltable adhesive is used for adhering the individual layers of said plurality of fiber layers together to form said at least one wall member, said lips and said flat bottom member, said hot meltable adhesive being applied to said lips in a hot condition prior to their complete folding against said flat bottom member,
- said lips being formed by linear incisions in said bottom portion extending parallel to said axis of said container up to said folding line, the planes of said incisions being at an acute angle with respect to a tangential plane of said at least one wall member, said tangential plane being parallel to said axis,
- whereby said hot meltable adhesive enables said individual layers of said lips to slide relative to each other when said lips are folded from said wall member against said bottom member, and wherein a portion of said lips overlap a portion of an adjacent lip once said lips are folded against and adhered to said bottom member.
Dependencies are inferred from the claim text.