Apparatus and method for detecting an ending-point of bobbin thread for sewing machine using bar code
OwnerHoon Sik Choinventor
Life of this patent
Estimating the term…
Abstract
The present invention relates to an apparatus and a method for detecting the ending-point of a bobbin thread for a sewing machine using a bar code, which is capable of alerting a sewing operator of his/her desiring bobbin thread remains when they are left enough to finish sewing under operation. The present invention of the apparatus for detecting the ending-point of a bobbin thread for a sewing machine using a bar code so as to sense the ending-point of a bobbin thread during a sewing operation, comprises a bobbin to wind a bobbin thread therearound and at least one bar code to indicate a position in the surface of a bobbin, of which the bar code is printed on one or both side(s).
Claims7
An apparatus for detecting an ending-point of a bobbin thread for a sewing machine, the apparatus comprising:
- a bobbin having a thread winding surface to wind a bobbin thread there-around;
- at least one bar code printed on one or both side areas in the thread winding surface of the bobbin to indicate a position in the bobbin where the bar code is printed;
- and
- a bar-code detector configured to read the bar code as a bobbin thread is unwinding to expose the bar code in order to sense an ending-point of the bobbin thread during a sewing operation.
A method for detecting an ending-point of a bobbin thread for a sewing machine, the method comprising the steps of:
- providing at least one bar code printed on one or both side areas in a thread winding surface of a bobbin to indicate a position in the bobbin where the bar code is printed;
- sensing by reading the printed bar code value in an exposed part of the thread winding surface of the bobbin as a bobbin thread is unwinding to expose the bar code;
- converting the sensed bar code value into a digital value;
- comparing the digital value with a preset dial value which indicates a selected position in the bobbin;
- and
- providing an alerting signal to inform running out of the bobbin thread when the digital value corresponds to the preset dial value.
Dependencies are inferred from the claim text.