A method for making block of side-gussetted, bottom-weld bags. Each bag has an opening on one side to fascilitate the removal of individual bags from the block....http://www.google.fr/patents/US4946431?utm_source=gb-gplus-shareBrevet US4946431 - Apparatus for the manufacture of block-sealed side-gussetted bags
Apparatus for the manufacture of block-sealed side-gussetted bags
