Sewing – Work manipulating – Trimmers
Reexamination Certificate
2001-10-16
2002-10-08
Izaguirre, Ismael (Department: 3765)
Sewing
Work manipulating
Trimmers
Reexamination Certificate
active
06460474
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a side cutter to be attached to a sewing machine for facilitating hemstitching by the sewing machine.
DESCRIPTION OF THE RELATED ART
Side cutters for facilitating hemstitching by sewing machines have so far been developed, and Japanese Patent No. 2839510 proposes an invention for preventing crosswise run-out of a movable blade in a side cutter. The side cutter
100
has a tabular base plate
1
and a vertical section
1
a
rising therefrom and is designed to be attached to a sewing machine by fixing a front end portion
2
of the vertical section
1
a
of the base plate
1
to a presser bar
3
of the sewing machine with a thumbscrew
4
, as shown in FIG.
6
.
The side cutter
100
has a presser foot
18
attached to the lower side of the base plate
1
, a fixed blade
21
attached to a front end portion of the presser foot
18
and a movable blade
23
located above the fixed blade
21
. The movable blade
23
cuts cloth in cooperation with the fixed blade
21
. The base plate
1
has in its vertical section
1
a
a working lever
5
, which transmits the vertical movement of a sewing machine needle to the movable blade
23
through a lever
13
to be described later.
As shown in
FIG. 7
, the presser foot
18
supports, in its vertical section
18
c
formed in the middle thereof, the lever
13
with a supporting shaft
25
so that the lever
13
can swing vertically. Meanwhile, a leaf
26
is attached to a rear end portion
13
a
of the lever
13
. This leaf
26
is brought into plane contact with a lateral side of a vertical section,
18
d
formed in the rear end portion of the presser foot
18
to urge the lever
13
in the horizontal direction as indicated by the arrow
26
a.
Thus, the movable blade
23
, which is fixed to a front end portion
13
b
of the lever
13
, reciprocates vertically pushing the cutting edge of the fixed blade
21
in the horizontal direction indicated by the arrow
26
b
to cut cloth.
However, the side cutter
100
for a sewing machine involves the problem that the mechanism containing the lever
13
, the leaf
26
and the like incorporated to ensure shear force required in cutting cloth by bringing the movable blade
23
into contact with the cutting edge of the fixed blade
21
is complicated and it entails great trouble and cost in manufacturing it.
Meanwhile, operations of attaching and detaching the side cutter
100
to and from the sewing machine are intricate and take much time, since its vertical section
1
a
of the base plate
1
must be fastened at the front end portion
2
with the thumbscrew
4
to the presser bar
3
of the sewing machine.
The present invention is directed to providing a side cutter for a sewing machine having overcome the problems inherent in the prior art as described above, which is small-sized and simple-structured and yet can securely achieve shearing of cloth and which can be attached and detached to and from a sewing machine speedily and securely.
SUMMARY OF THE INVENTION
The gist of the present invention resides in a side cutter for a sewing machine, the side cutter comprising a fixed blade located in front of a frame body; a link frame attached to the frame body so as to transmit a vertical movement of a sewing machine needle to the movable blade; the movable blade being fixed to a lower front end portion of the link frame to cut cloth in cooperation with the fixed blade; the frame body having a holder coupling section to be detachably engaged with a holder and fixed to the sewing machine.
The side cutter for a sewing machine is also characterized in that the holder coupling section has a pair of guides standing on each side respectively and a supporting rod extended between front end portions of the guides and that the holder coupling section is located under the frame body.
The side cutter for a sewing machine is also characterized in that the link frame is attached to the frame body through a spring washer.
The side cutter for a sewing machine is also characterized in that the movable blade is fixed to a front lower end portion of the link frame through a spring washer.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings illustrating by way of examples the principles of the invention.
REFERENCES:
patent: 2021700 (1935-11-01), Pugach
patent: 2443369 (1948-06-01), Alifano et al.
patent: 4572089 (1986-02-01), Nishi
patent: 4984525 (1991-01-01), Mori
Izaguirre Ismael
Nishi Manufacturing Co., Ltd.
LandOfFree
Side cutter for sewing machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Side cutter for sewing machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Side cutter for sewing machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2999600