Multi-layer bag and method for producing a multi-layer bag
Assigneedy-pack Verpackungen Gustav Dyckerhoff GmbH
InventorEduard LISEK
Life of this patent
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Abstract
Multi-layer bag for bulk material, comprising at least one layer of material comprising paper or paper-like material, wherein two layers of material are formed by pieces of tube (22, 32) inserted telescopically in one another, wherein a first of the pieces of tube (22) inserted telescopically in one another has at one end (27) an overhang (U1) with respect to a second of the pieces of tube (32) inserted telescopically in one another.
Claims20
A multilayer sack for bulk material having at least one material layer of paper or paper-like material, wherein
- two material layers are formed from tubular pieces (22, 32) telescopically inserted into one another, and
- a first one of the tubular pieces (22) telescopically inserted into one another has a projection (U1) at one end (27) with respect to a second one of the tubular pieces (32) telescopically inserted into one another.
A method of manufacturing a multilayer sack from at least two layers of a web-like planar material, in particular paper and/or plastic, in which the material layers are placed over one another in a tubular fabric machine and are divided into pieces and are shaped into multilayer tubular pieces (22, 32) such that the multilayer tubular piece comprises an at least two-layer telescopic tubular piece, wherein the telescopic tubular piece comprises at least two tubular pieces (22, 32) telescopically inserted into one another, and at least one of the tubular pieces (22) telescopically inserted into one another has a projection (U) with respect to at least one other one of the tubular pieces (32) telescopically inserted into one another in and/or against the conveying direction (F) of the tubular fabric machine.
Dependencies are inferred from the claim text.