| 摘要 |
PROBLEM TO BE SOLVED: To make a plastic sack have, at a low cost, information on classification items corresponding to the classification items including the year, month and day of manufacture, a manufacturing lot and a sack making machine and to eliminate the possibility of forgery of the information on the classification items, in regard to the sack making machine which cuts a plastic film 1 by a cutter 4 at every intermittent feeding of the film and manufactures the plastic sack 5. SOLUTION: The cutting characteristics of the edges of the cutter are changed every time for each of the classification items including the year, month and day of manufacture, the manufacturing lot and the sack making machine. Thereby a cut state or a cut shape of the plastic film is changed and the plastic sack is made to have the information on the classification items. |
