Sewing machine
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsYasunori Suzuki, Hirokazu Hirose
Life of this patent
Estimating the term…
Abstract
A sewing machine includes a thread tension mechanism, a thread feed sensor, a sewing portion, a processor, and a memory. By executing instructions stored in the memory, the processor causes a first tension to act on an upper thread by the thread tension mechanism to be in a first state, in a state in which a sewing is stopped. The processor causes a second tension that is smaller than the first tension to act on the upper thread, by causing the thread tension mechanism to be in a second state, when the movement of the upper thread is detected by the thread feed sensor. The processor causes a third tension that is equal to or greater than the second tension to act on the upper thread by causing the thread tension mechanism to be in a third state, in a state in which the sewing is performed.
Claims7
A sewing machine comprising:
- a thread tension mechanism configured to cause a tension to act on an upper thread;
- a thread feed sensor configured to detect a movement of the upper thread;
- a sewing portion configured to perform sewing using a sewing needle;
- a processor;
- and
- a memory configured to store computer-readable instructions, when executed by the processor, perform processes comprising:
- causing a first tension to act on the upper thread by causing the thread tension mechanism to be in a first state, in a sewing stopped state in which the sewing by the sewing portion is stopped;
- causing a second tension to act on the upper thread, by causing the thread tension mechanism to be in a second state, when the movement of the upper thread is detected by the thread feed sensor, the second tension being smaller than the first tension;
- and
- causing a third tension to act on the upper thread by causing the thread tension mechanism to be in a third state, in a sewing state in which the sewing by the sewing portion is performed, the third tension being equal to or greater than the second tension.
Dependencies are inferred from the claim text.