Patent ID: 6182918
Filing Date: 2001-02-06
Classification: D05B

Abstract:
A lower thread device comprising:lower thread supply means for guiding a lower thread out from a lower thread supply source and also for supplying said lower thread to a bobbin through an opening formed in a bobbin case;bobbin rotate means including a rotary body disposed on a bobbin within said bobbin being contactable with and separable from said bobbin, said bobbin rotate means being capable of rotating said bobbin due to mutual contact between said rotary body and said bobbin to thereby wind said lower thread around said bobbin; anda thread handling member for handling a lower thread extended from said bobbin case to said lower thread supply source to thereby guide said lower thread from said opening of said bobbin case up to a slit formed in the peripheral side surface of said bobbin case, wherein the pressing forces of said bobbin rotate means and said bobbin against each other is set in a half-clutch state.