Method for button sewing
AssigneesJuki Corporation, Takatori Machinery Manufacturing Co., Ltd.
InventorsHideo Asao, Satoru Yamazi, Seiichi Saibe
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Abstract
A button sewing apparatus comprising a button supply device, a X-Y mover, a stay button chucking device, a surface button chucking device, a surface button turning device, a presser foot device, a thread guiding device and a thread holding device. Button neck wrapping is performed in a manner closely simulating "hand" sewing. After sewing both a stay button and a surface button to a workpiece, a sewing table makes a circular motion while keeping a needle entry as the center, and a thread is slidably clamped and guided to pass through a guide hole tentatively formed underneath a needle such that the thread wraps firmly around the button neck.
Claims1
In a button sewing machine having a driving device to traverse a needle provided with the predetermined length of thread for sewing attached thereto comprising an upper-needle-bar and a lower-needle-bar which are arranged to conduct relative up-down motion, and a moving device which moves a workpiece with a button attached thereto in an X-Y direction, a method of button-neck-wrapping after sewing both a stay button, and a surface button comprising the steps of:
- (a) turning a surface button to be positioned aside from needle's passage-way so that the needle may penetrate upward into a work piece and be received into an upper-needle-bar,
- (b) guiding a thread into a guide formed under a needle, and pressing the thread between clampers to stretch the thread when pulled, and releasing surface button chucking, and
- (c) driving a X-Y mover to perform circular motion horizontally to conduct button-neck-wrapping.
Dependencies are inferred from the claim text.