B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
B31B 31/00 (2006.01) B31B 29/00 (2006.01)
Patent
CA 2041196
ABSTRACT OF THE DISCLOSURE The invention refers to a method for manufacturing a sack or bag with a bottom being rectangular in the filled state and a handle portion joined thereto. In order to provide an economical method of the above-mentioned kind for the production by machine, ac- cording to the invention the following steps are carried out sub- sequently. At first a tube piece (10) is provided at one end the- reof with two slits being substantially in parallel to each other and to the lateral fold edges. Then the bottom is mounted thereon, thereby forming the corner tucks (14) and the side tucks (16, 18). Furthermore, handle portion sheets (22), being produced in separate method steps and comprising a reinforcing portion (24) and a portion (26) forming a reinforcing strip in the glued state, is preferably glued or welded such that at a side tuck (16) an edge portion (20) is not covered by the prefab- ricated handle portion. Subsequently, a side tuck (16) and the corner tucks (14) are folded at a fold line (28) extending through the tops of the corner tucks (14) and the glueing or welding is carried out over an area through the edge zone (30) of the side tuck (16) and, if required, of the handle portion sheet (22) being put on. (Fig. 5)
Achelpohl Fritz
Jurgens Werner
Achelpohl Fritz
Jurgens Werner
Marks & Clerk
Windmoller & Holscher
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