Stapler

Details Stapler Stapler

1999-09-03

2001-01-30

Smith, Scott A. (Department: 3721)

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

C227S127000, C227S134000

Reexamination Certificate

active

06179193

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a stapler which facilitates the removal of jammed staples.
BACKGROUND TO THE INVENTION
When a conventional stapler is operated without documents being inserted in the device, a staple becomes bent and jammed in the ejecting mouth of the stapler. In such a case, although it is possible to remove the jammed staple with the end of a pencil or wire, removal of jammed staples is difficult as the staple ejecting mouth is formed only of a size to allow passage of one staple at a time.
As a result, various mechanisms for the removal of staples jammed in the staple ejecting mouth have been proposed. For example, as shown in
FIGS. 15A and 15B
, a stapler is proposed which comprises a cover covering the staple ejecting mouth of the frame which forms the stapler. The cover displaces vertically on the rear surface of the frame. Staples which have become jammed are removed by vertically displacing this cover. In the stapler shown in
FIGS. 15A and 15B
, the stapling operation is performed by depressing the cover downwardly. When a staple becomes jammed when the operation is performed without documents being inserted, the cover is displaced upwardly, the staple ejecting mouth is widened and the jammed staple is removed.
However in the stapler as shown in
FIGS. 15A and 15B
, since the cover is provided along the outer side of the frame, it is necessary to mount a pin and manufacture the shape of the frame and the cover so that the cover can slide vertically on the frame. Furthermore it is necessary to provide a plate spring or the like to create friction between the cover and the frame so that the cover is not easily displaced vertically in the stapling operation. As a result, the number of components and processing steps are increased and manufacturing costs rise.
Therefore it is an object of the present invention to provide a stapler which provides a cheap and simple mechanism of removing jammed staples.
DISCLOSURE OF THE INVENTION
The present invention comprises a base, a frame which is provided on the base and which has a staple ejecting notch and a staple insertion mouth, an opening and closing means which partially opens and closes the staple ejecting notch and which forms a staple ejecting mouth on the staple ejecting notch in a closed position, a staple guiding means which is provided on the frame and which guides the staple towards the staple ejecting mouth from the staple insertion mouth, a staple impelling means which pushes staples guided to the staple ejecting mouth out of the frame from the staple ejecting mouth one by one in the stapling operation, and a retaining mean which retains the staple impelling means to slide freely on the end face near the staple ejecting mouth of the frame. The invention is characterized in that the opening and closing means is provided between the end face of the staple ejecting mouth side and the staple impelling means along the inside of the frame.
Herein it is preferred that the opening and closing means acts as a guide to guide the staple impelling means.
It is further preferred that the opening and closing means has a gripping section which projects outwardly from the frame so as to abut with the upper end face of the frame in the closed position.
It is further preferred that a notched section is provided in the direction of displacement of the opening and closing means on the end face of the staple ejecting mouth side of the frame and an engaging section is formed to engage both the notched section and the opening and closing means. The engaging section engages when the opening and closing means is in the closed position.
It is further preferred that a through hole is formed in proximity with the staple ejecting mouth on the frame.
It is further preferred that the staple guiding means comprises an outer guiding section which guides the staple by being adapted to the outer shape of the staple and an inner guiding section which guides the staple by being adapted to the outer shape of the staple and by engaging with the outer guiding section. The inner guiding section has a narrow width approximating that of the staple ejecting mouth and is formed to widen from the staple insertion mouth towards the staple ejecting mouth.
It is further preferred that the inner guiding section has a narrow width section having a narrow section formed in a fixed position widely from the staple insertion mouth towards the staple ejecting mouth and a wide section having a greater width than the narrow section below the fixed position.
It is further preferred that the outer guiding section is provided with a projection facing the narrow section of the inner guiding section.
It is further preferred that a handle section and an impelling section are provided. The handle section mounts one end to rotate freely on the frame. The impelling section is provided on the handle section and to pressure the staple impelling means by rotating the handle section in the direction of stapling. The handle section is provided with a variable length section the length of which can be varied.
It is further preferred that a locking mechanism is provided which fixes the handle section on the frame when rotating in a direction of stapling and which releases this fixation by a fixed operation.


REFERENCES:
patent: 2289308 (1942-07-01), Fancher et al.
patent: 3076195 (1963-02-01), Jopp
patent: 4005812 (1977-02-01), Doyle et al.
patent: 4520956 (1985-06-01), Urresti
patent: 5642849 (1997-07-01), Chen
patent: 60-194483 (1985-12-01), None
patent: 61-92575 (1986-06-01), None

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