Binding sewing machine for forming diagonal bag, has knife controller forming bevel cuts on sides of linear section such that cuts have different cutting lengths and both ends of each cut coincides with end positions of joint and/or section

摘要

The machine (10) has miter knife mechanisms (100A, 100B) arranged such that the mechanisms correspond to a front region or a rear region of a linear section. A knife controller forms left and right bevel cuts on corresponding sides of the section such that the cuts have same cutting lengths and an end of each cut coincides with an end position of a linear joint. Another knife controller forms the cuts on the sides of the section such that the cuts have different cutting lengths and both ends of each cut coincides with the end position of the joint, and/or an end position of the linear section.