Methods for preparing flat-bottom thermoplastic sack and...

Details Methods for preparing flat-bottom thermoplastic sack and... Methods for preparing flat-bottom thermoplastic sack and...

B - Operations, Transporting

31

B

93/33

B31B 27/14 (2006.01) B31B 37/00 (2006.01)

Patent

CA 1249471

ABSTRACT Method and system for preparing a flat-bottom thermoplastic sack including forming a transverse sealed seam across the mid-section of a collapsed, gusseted tube and simultaneously or subsequently forming a preweakened transverse line closely next adjacent to said sealed seam; forming diagonal sealed seams of each 2 ply gusset fold so as to meet the ends of said transverse sealed seam and removing the four double-film triangular regions outside of said diagonal seams and separating said structures along said preweakened lines to form individual flat bottom sacks. The process also includes forming a handled version of the same sack.

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