Staple expelling device for staplers

Details Staple expelling device for staplers Staple expelling device for staplers

2003-05-21

2003-12-16

Smith, Scott A. (Department: 3721)

Elongated-member-driving apparatus

With means to support member and/or work relative to driver

Work immobilizer

C227S005000, C227S134000

Reexamination Certificate

active

06662991

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a stapler which includes a rotatable member connected on the document guide and can be pivoted an angle to be located on a center axis such that the magazine casing may be supported on the rotatable member so that the jammed staple can be expelled by pushing the arm.
BACKGROUND OF THE INVENTION
A conventional stapler
10
is disclosed in
FIGS. 1 and 2
, and generally a base
11
with an arm
14
pivotably connected to a connection frame
100
on the base
11
, and a magazine casing
13
is pivotably connected to the connection frame
100
and can be pivoted downward with the downward movement of the arm
14
. A push plate
15
is connected to an underside of the arm
14
so as to push the staples
20
received in the space
16
in magazine casing
13
. A document guide
12
is movably connected to the base
11
and includes a guide surface
121
such that a pile of document may be guided onto the guide surface
121
and the staples
20
pushed by the push plate
15
penetrate through the pile of the document. As shown in
FIG. 2
, the staple
20
could be jammed in the magazine casing
13
and cannot be pushed out from the magazine casing
13
by the push plate
15
. The user has to insert an object such as a pencil
30
between the base
11
and the magazine casing
13
to form a gap between the magazine casing
13
and the base
11
so that when pushing the push plate
15
, the jammed staple
20
can be forced to drop from the magazine casing
13
. Nevertheless, the pencil
30
is damaged by the downward force of the magazine casing
13
and this is not convenient at all.
The present invention intends to provide a jammed staples expelling device that is rotatably connected to the document guide and can be easily rotated to support the magazine casing to allow the jammed staple to be expelled by pushing the arm.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a stapler which comprises a base with a document guide movably connected to a top thereof and an arm is pivotably connected to a connection frame on the base. A magazine casing located beneath the arm is pivotably connected to the connection frame and a push plate is connected to an underside of the arm and inserted in the magazine casing. The document guide includes a first protrusion and a second protrusion. A guide surface is defined in a side of each of the first protrusion and the second protrusion. At least one groove is defined in an outer periphery of the second protrusion. A rotatable member is rotatably mounted to the second protrusion and includes at least one rib which is disengagably engaged with the at least one groove. A support portion is connected to the rotatable member and switched below the magazine casing by rotating the rotatable member.


REFERENCES:
patent: 2073958 (1937-03-01), Crosby
patent: 2786203 (1957-03-01), Treciokas
patent: 2897500 (1959-04-01), Lang
patent: 3523634 (1970-08-01), Power et al.
patent: 5267682 (1993-12-01), Okouchi
patent: 5692667 (1997-12-01), Chi

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