| 摘要 |
In a device (1) for forming an open bottom in an end region (10e) of a tubular bag body (10), the bag bodies (10) are transported in a flat manner in a transporting direction (T) transverse to the bag body longitudinal extension (L) at a transporting speed (V), and the end regions are opened with an opening device (20). A widening tool is introduced into the opened end regions (10e) of the bag bodies during their transportation on the transporting device and moved in the transporting direction (T) at a speed (VIR) that is increased relative to the transporting speed (V) until front contour points (23p, 24p; 33p, 34p) of said tool run against the inner face of the bag body on the front part (10v) of the opened end region. Said tool widens the front part (10v) into a front corner flap (10j) in the form of an isosceles triangle. The widening tool (21, 30, 32) is moved out of the front corner flap (10j) by slowing of the movement of said tool with respect to the transporting speed (V) after formation of the corner flap (10j). The corner flap is pressed with a pressing device (28, 35, 36). |
