Paper fastener having folded and shielded side edges

Details Paper fastener having folded and shielded side edges Paper fastener having folded and shielded side edges

2002-03-05

2003-05-20

Martin-Wallace, Valencia (Department: 3722)

Binder device releasably engaging aperture or notch of sheet

Pliant, deformable sheet retainer

C402S014000, C402S015000, C402S017000, C402S064000, C402S068000, C024S06700R, C024S067500, C024S067110

Reexamination Certificate

active

06565277

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a paper fastener, and more particularly to a paper fastener having side flanges folded and shielded for preventing the burred side flanges of the paper fastener from hurting users.
2. Description of the Prior Art
U.S. Pat. No. 6,217,246 to Yu discloses one of the typical paper fasteners.
FIG. 1
shows the cross sectional view of Yu's paper fastener which includes a base
20
having two folded side flanges
21
and having two end prongs
22
, a compressor
10
having two holes for receiving the prongs
22
and also having two folded side flanges
12
, and two retainers slidably engaged onto the compressor
10
for engaging with the folded prongs
22
and for detachably securing the compressor
10
and the base
20
together. However, the compressor
110
and the base
20
are normally made by punching processes, such that the folded side flanges
12
,
21
of the compressor
10
and the base
20
may be rough or serrated or burred. In addition, the compressor
10
and the base
20
have not been suitably shielded or covered, such that the compressor
10
and the base
20
may easily hurt the users.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional paper fasteners.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a paper fastener including folded side flanges that may be shielded for preventing the burred side flanges of the paper fastener from hurting users.
In accordance with one aspect of the invention, there is provided a paper fastener comprising a base including two ends each having a leg extended therefrom and foldable relative to the base for engaging through sheet materials, the base including two side panels bent relative to the base for forming a bent portion between the side panels.and the base respectively, the side panels being located lower than the base for forming a recess between the base and the side panels respectively, the side panels each including an outer flange folded relative to the side panels respectively and engaged into the recess of the base and engaged with the side panels respectively, the outer flanges of the side panels each including a free edge located beside the bent portions of the base and shielded by the bent portions and the side panels of the base respectively, a bar including two end orifices for receiving the legs of the base and for engaging onto the sheet materials, the legs of the base being foldable to engage onto the bar for clamping the sheet materials between the base and the bar, the bar including two side flaps bent relative to the bar for forming a bent portion between the side flaps and the bar respectively, the side flaps being located higher than the bar for forming a recess between the bar and the side flaps respectively, the side flaps each including an outer flange folded relative to the side flaps respectively and engaged into the recesses of the bar and engaged with the side flaps respectively, the outer flanges of the side flaps each including a free edge located beside the bent portions and shielded by the bent portions and the side flaps of the bar, and two retainers slidably engaged on the bar for engaging with the legs and for securing the paper sheets between the base and the bar.


REFERENCES:
patent: 1978569 (1934-10-01), Dayton
patent: 2182058 (1939-12-01), Ross
patent: 3994606 (1976-11-01), Messmer
patent: 4620812 (1986-11-01), Kim
patent: 4979841 (1990-12-01), Lauder
patent: 5011318 (1991-04-01), Gilmore
patent: 5096323 (1992-03-01), Walker
patent: 5810498 (1998-09-01), Hirai
patent: 5988925 (1999-11-01), Baggett
patent: 6217246 (2001-04-01), Yu
patent: 6394685 (2002-05-01), Lee

Affiliated with

Also associated with

Rating

Paper fastener having folded and shielded side edges does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Paper fastener having folded and shielded side edges, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Paper fastener having folded and shielded side edges will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3058669