Back to results
US 7,837,606 B2Granted
Method for the production of bags
AssigneeWindoeller & Hoelscher
InventorsKonrad Tetenborg, Uwe Koehn, Siegfried Maneke, Jan Thorsten Weber
Life of this patent
Estimating the term…
Abstract
A process for manufacturing a bag from a polymer and/or metal film material provides a bag that has four outer walls connected by four seams and that has a sealed lower end. The bag-forming material is fed in the form of a film web that is wound up on a roll to an unwinding station of a bottom forming device that separates the unwound film web into film segments, connects the film segments, and seals at least one end of the connected segments to form the bag.
Claims8
A process for manufacturing a bag from a polymer and/or metal film bag-forming material, comprising
- feeding the bag-forming material that is in a form of a single film web and that is wound up on a roll to an unwinding station of a bottom forming device,
- unwinding the wound film web with the unwinding station,
- cutting the unwound film web into four film segments,
- connecting the four film segments to form a film tube having four outer walls that are connected respectively by four seams, at least one part of the four seams of the film tube being formed by a joining process in which additional adhesive or extrudate joining material is applied on the seam,
- winding up the formed film tube,
- unwinding the wound film tube, and
- sealing the connected film segments so as to form at least one sealed end of the bag.
4 more elements
Dependencies are inferred from the claim text.