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US7331917B2 「Bag making machine」
summary:bottom gusset portion is formed by folding trunk member
●Web unit for bottom gusset is unnecessary.
●Printing without misalignment is possible. (bottom surface~front(back)side)
・JP3655627 ・EP1541332B(Italy,Austria,Denmark,Germany,France)
・AU2003252232 ・CA2493659 ・CN:ZL03817408.1