Patent ID: 6032598
Filing Date: 2000-03-07
Classification: D05B

Abstract:
A scissors-type thread-cutting device for a sewing machine, the machine including a machine bed, which has a vertical wall that is formed with a threaded hole, the thread-cutting device comprising:an elongated base adapted to be fixed on the vertical wall of the machine bed;an elongated first blade member mounted telescopically on said base and movable lengthwise on said base;means for locking said first blade member releasably on said base;a sliding member mounted slidably on said first blade member and movable lengthwise on said first blade member;a driving unit adapted to be disposed on the vertical wall of the machine bed for activating said sliding member to reciprocate on said first blade member;an elongated second blade member mounted telescopically on said sliding member and pressing against said first blade member, said second blade member being capable of moving lengthwise on said sliding member, said first and second blade members having intersecting cutting edges, which are adapted to cut a thread therebetween during movement of said second blade member relative to said first blade member; andmeans for locking said second blade member releasably on said sliding member;whereby, the thread can be moved into a space between said first and second blade members, thereby permitting the thread to be cut off by said intersecting cutting edges of said first and second blade members.