Overlock sewing machine with movable cutter

Details Overlock sewing machine with movable cutter Overlock sewing machine with movable cutter

1999-04-13

2000-08-15

Izaguirre, Ismael

Sewing

Work manipulating

Trimmers

112162, 112129, D05B 3704

Patent

active

061019607

ABSTRACT:
An overlock sewing machine has a movable cutter which is activated in association with rotation of a main drive shaft to cooperate with a fixed cutter provided in the same plane with an upper surface of a needle plate, to thereby cut a work while the work is being stitched. A link mechanism includes a drive link having one end rotatably connected to a mount and the other end is connected to the movable cutter and a swingable link having an arcuate guide groove extending between one end and a center axis thereof around which the swingable link is swingingly moved. The drive link has a point between opposite ends thereof operatively connected to the arcuate guide groove of the swingable link. An operating device includes an operating shaft which is operatively connected to the point of the drive shaft so that the point of the drive link may be substantially moved along the arcuate guide groove of the swingable link between said one end and center axis thereof by manipulation of an operating knob. The drive link having the point thereof moved to one end of the swingable link will be swingingly reciprocated to activate the movable cutter, and having the point thereof moved to the central axis of the swingable link will move the movable cutter to an inoperative position below the needle plate where the movable cutter is held at standstill.

REFERENCES:
patent: 4773342 (1988-09-01), Fietta
patent: 5289789 (1994-03-01), Sakuma
patent: 5813356 (1998-09-01), Nolle

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