Sewing machine

Details Sewing machine Sewing machine

2007-09-26

2009-11-17

Welch, Gary L (Department: 3765)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C112S102000, C112S272000, C112S475020

Reexamination Certificate

active

07620472

ABSTRACT:
A sewing machine executing a free-motion capable of sewing while a workpiece cloth is manually moved by an operator includes a needlebar having a lower end to which a sewing needle is attached, a needlebar driving mechanism vertically driving the needlebar via a main shaft, a presser foot pressing the workpiece cloth manually moved by the operator, an imaging device imaging at least an area of the workpiece cloth near to the sewing needle, a movement amount operating device obtaining by operation a movement amount of the workpiece cloth based on image data from the imaging device, a setting device setting a stitch pitch on the workpiece cloth, a comparing device comparing the obtained movement amount of the workpiece cloth and the set stitch pitch, a cloth movement limiter limiting movement of the workpiece cloth by the manual operation, and a control device controlling the cloth movement limiter according to a result of comparison.

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