Sewing – Elements – Frames
Reexamination Certificate
2000-06-12
2001-06-12
Izaguirre, Ismael (Department: 3765)
Sewing
Elements
Frames
C112S153000
Reexamination Certificate
active
06244202
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the needle plate for the sewing machine, which supports the materials to be sewn such as textile fabrics, leather and resin sheets in a stable condition, appropriate for the use of a sewing machine.
2. Description of the Prior Art
The conventional way of sewing the above mentioned fabric is by moving forward the sending tooth
62
in order to sew the fabric A provided between the needle plate
60
and the pressing piece
61
forming the sewing machine (The figure is not provided.) as shown in the
FIG. 13
, for example so that the needle of the sewing machine is moved up and down to sew the fabric. When the pressing piece
61
is pressed against the needle plate
60
to sew the fabric, contact resistance given to the fabric A is so large that it is easy to cause puckering to the fabric A like ruffling, tucking and crumpling.
Therefore the pressing piece
61
is to be once raised to send the fabric A to the position B on the needle plate
60
, where the needle is to be fallen. One of the problems involved is that operation efficiency gets worse when the short fabric A is to be sewn consecutively as the pressing piece
61
involves a lot of troubles in the step and operation of moving up and down.
On the other hand, the fabric A which is provided on the position B on the needle plate
60
where the needle is fallen, will be pressed by the pressing piece
61
so that it is impossible to amend the puckering which has occurred before the fabric is provided. Another problem is that when the pressing piece
61
is exchanged or there is a change in the way of sewing, by putting an attachment (The figure is not provided.) for example, a lot of tasks and time are involved, which is necessary for setting the pressure adequate for preventing the puckering or adjusting the position.
SUMMARY OF THE INVENTION
The main purpose of this invention is to provide for a support of the material to be sewn to change its position to permit the sending of the material to be sewn when the material to be sewn is to be sent between the needle plate and the pressing piece, so that it is possible to save tasks and operations like moving up and down the pressing piece every time the material to be sewn is sent forward, saving also the time needed to carry out the moving up and down of the pressing piece. As it is possible to sew the subsequent material to be sewn while just pressing the pressing piece against the needle plate, consecutive operations of sewing the material to be sewn are possible, thus providing for a higher efficiency of the sewing operations.
The support of the material to be sewn bends roughly in function of the thickness of the material to be sewn so that contact resistance given to the material to be sewn is small with less possibilities of puckering, thus providing for a smooth sewing of the material to be sewn.
Another object of the present invention is to support in suspense the material to be sewn on and above the support of the material to be sewn so that a reasonable amount of the pressure will be given against the material to be sewn, thus avoiding errors and omission in sewing and providing for a smooth sewing.
Another object of the present invention is to provide a material to be sewn on the needle plate where the needle falls, regulating it according to the determined width of the sewing with the guide of the material to be sewn so that it is possible to prevent the change in a width of the sewing, allowing for an exact and smooth operation of the sewing.
Another object of the present invention is to provide for a material to be sewn on the needle plate where the needle is to fall by winding around the said material to be sewn with the device to wind around the material to be sewn so that it is possible to prevent the change in a width of the winding, thus allowing for an exact and easy operation of sewing while keeping the material to be sewn wound up in a desired condition.
Another object of the present invention is to move the guide of the material to be sewn and the winding device of the material to be sewn roughly parallel with the sending part of the needle plate, thus allowing for a change in the width and the location of the sewing and making it possible to sew into a desired condition in a stable manner.
Furthermore, another object of the present invention will be easily clarified according to the below mentioned examples.
REFERENCES:
patent: 1526933 (1925-02-01), Rhyon
patent: 2977911 (1961-04-01), Moore et al.
patent: 3020864 (1962-02-01), Katz
patent: 3247819 (1966-04-01), Forca
patent: 4150633 (1979-04-01), Adams
patent: 4423690 (1984-01-01), Willenbacher et al.
patent: 4532874 (1985-08-01), Eguchi et al.
patent: 5497721 (1996-03-01), Sulser et al.
Izaguirre Ismael
Moonray Kojima
LandOfFree
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