Elongated-member-driving apparatus – With means to move or guide member into driving position – Including supply magazine for constantly urged members
Reexamination Certificate
2003-02-19
2004-04-27
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
06726081
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stapling apparatus with a safety device, and more particularly to a stapling apparatus with a safety device for a stapler that prevents staples in a stapler from popping out of the stapler.
2. Description of Related Art
A stapler is a device to connect pieces of paper by means of a staple. With reference to
FIG. 4
, a conventional stapler (
20
) comprises a first lever (
21
), a second lever (
22
), a stapling apparatus (
23
) in accordance with prior art and a sliding front cover (
24
). The two levers (
21
,
22
) are pivotally connected by a pivot pin (not numbered). The first lever (
21
) has a front end (not shown) opposite the pivot pin. The stapling apparatus (
23
) is mounted around the front end of the first lever (
21
) and is pivotally attached to the pivot pin. The stapling apparatus (
23
) comprises a stapling assembly (not shown), a track (
232
) and a pushing device (
233
). The pushing device (
233
) has a compressed spring (
234
) that creates a resilient force. A set of staples (
50
) is slidably mounted on the track (
232
). The set of staples (
50
) is held on the track (
232
) in the stapler (
20
) by the resilient force of the compressed spring (
234
) pushing the set of staples (
50
) into a position where one staple in the set of staples (
50
) will be pressed by the stapling assembly to connect pieces of paper together. The sliding front cover (
24
) is movably attached to the stapling apparatus (
23
) at the front of the first lever (
21
). The sliding front cover (
24
) can be pushed upward to conveniently troubleshoot the stapler (
20
) when the stapler (
20
) has a problem.
Occasionally, one of the staples in the set of staples (
50
) in the stapler (
20
) will jam or may not be fed smoothly while stapling. Generally, such a state is caused by one of the stapes in the set staples (
50
) being bent or otherwise jammed in the stapling assembly (
23
) to keep the stapler (
20
) from functioning. One way to solve the problem is to remove the staple lodged in the stapling apparatus (
23
) of the stapler (
20
) or clear the jammed staple of the set of staples (
50
). Pushing the sliding front cover (
24
) upward will provide access to quickly find and easily remove the staple lodged in the stapling apparatus (
23
). However, when the staple lodged in stapler (
20
) is removed, the remaining set of staples (
50
) will be released and pop out of the stapling apparatus (
23
) because of the resilient force of the pushing device (
233
). The conventional stapling apparatus of the stapler (
20
) does not have any safety device to prevent the set of staples (
50
) in the stapler (
20
) from popping out of the stapler (
20
). The conventional stapler (
20
) is potentially hazardous for a user when the user has to remove a staple lodged in the stapler (
20
). The ejected staples (
50
) may injure the user, especially the eyes or somebody near the user.
To overcome the shortcomings, the present invention provides a stapling apparatus with a safety device for a stapler to mitigate or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
The main objective of the invention is to provide a stapling apparatus with a safety device for a stapler that prevents staples in the stapler from suddenly popping out of the stapler when a user tries to remove a lodged staple that keeps the stapler from functioning.
REFERENCES:
patent: 2300277 (1942-10-01), Hansen
patent: 2420258 (1947-05-01), Maynard
patent: 2472032 (1949-05-01), Wandel
patent: 2795787 (1957-06-01), Spencer
patent: 3853257 (1974-12-01), Perkins
patent: 4452388 (1984-06-01), Fealey
patent: 4619394 (1986-10-01), Knispel et al.
patent: 5350103 (1994-09-01), Monacelli
patent: 6367676 (2002-04-01), Opland et al.
Dellett & Walters
Smith Scott A.
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