Bag forming, filling and sealing machine
AssigneeRobert Bosch GmbH
InventorsBarend Baastian Romijn, Alfred Wijkhuizen
Life of this patent
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Abstract
A bag forming, filling and sealing machine for producing bag packages with a base or block bottom comprising a forming tube whose lower part has two segments that accomplish a transition from a circular inlet cross section to a rectangular outlet cross section via a square intermediate cross section. As a result of the intermediate cross section, differences in length longitudinally along the jacket lines from the circular inlet cross section to the rectangular outlet cross section of the forming tube are virtually equalized. As a result, bulging and corrugation of the packaging material at the side faces of the bag packages is virtually precluded.
Claims18
A bag forming, filling and sealing machine (10) for producing bag packages (22) of rectangular cross section with a bottom closure and with side folds drawn in in a V made from a sheet of packaging material (14);
- comprising a forming tube (12) around which the sheet of packaging material (14) is formed into a tube (16), and which has a circular face in an inlet cross section (31) and a rectangular face on an outlet cross section (33), each face having the same circumference;
- having a folder device (25), disposed downstream of the outlet cross section (33) of the forming tube (12), for drawing side folds inward at least in a bottom region of an end segment of the tube;
- and having a crosswise seam sealing and cutting device (21) for forming a sealing seam in a region of the fold of the tube (16) and for cutting a filled bag package (22) off from the end segment of the tube below a rectangular outlet cross section (33) of the forming tube (12), an additional intermediate cross section (32) with the same circumference as the circular inlet cross section (31) and the rectangular outlet (33) cross-section is provided, so that the tube (16) is fed at the transition from the circular inlet cross section (31) to the rectangular outlet cross section (33) along jacket lines (1a-1b-1c through 8a-8b-8c).
Dependencies are inferred from the claim text.