Two-piece paper fastener having rounded sides

Details Two-piece paper fastener having rounded sides Two-piece paper fastener having rounded sides

2000-04-04

2001-04-17

Wellington, A. L. (Department: 3626)

Binder device releasably engaging aperture or notch of sheet

Pliant, deformable sheet retainer

C402S017000, C402S018000, C402S060000, C402S062000, C402S063000, C402S064000, C402S068000, C024S06700R, C024S067500, C024S067110, C024S0670CF

Reexamination Certificate

active

06217246

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an improved two-piece paper fastener wherein each side of the prong base and the compressor has a flange folded inward so as not to cut users' fingers.
BACKGROUND OF THE INVENTION
A conventional two-piece paper fastener is shown in
FIGS. 5 and 6
and generally includes a prong base
40
and a compressor
30
. The prong base
40
has two prongs
41
extending from two ends thereof and two holes
31
are respectively defined through two ends of the compressor
30
so that the two prongs
41
extend through papers (not shown) and the two holes
31
so position the papers between the prong base
40
and the compressor
30
. Two retainers
32
are movably mounted to the compressor
30
so that the two prongs
41
can be folded toward each other and are retained by the two retainers
32
. The prong base
40
and the compressor
30
are generally made of metal sheets or plastic sheets, and the metal sheets or the plastic sheets are pressed into pieces of the prong bases
40
and the compressors
30
so that the sides of each the prong base
40
and the compressor
30
have sharp raw material which could cut users' fingers. Besides, the prong base
40
and the compressor
30
with sharp raw material on their sides could result in tragedies if children use them as toys so that the conventional two-piece paper fastener needs to be improved.
The present invention intends to provide a two-piece paper fastener that includes a prong base and a compressor, and each side of the prong base and the compressor has a flange folded inward so as to define a smooth side.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a two-piece paper fastener comprising a prong base with two prongs extending from two ends of a top surface of the prong base. Each of two sides of the prong base is a rounded side. A compressor with two holes defined through two ends of the compressor. Two retainers are slidably mounted to the compressor and each of two sides of the compressor is a rounded side.
The object of the present invention is to provide an improved two-piece paper fastener wherein the prong base and the compressor have rounded sides so that they will not cut users' fingers.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.


REFERENCES:
patent: 1927623 (1933-09-01), Anderson
patent: 1978569 (1934-10-01), Dayton
patent: 3994606 (1976-11-01), Messmer
patent: 4070736 (1978-01-01), Land
patent: 4121892 (1978-10-01), Nes
patent: 5096323 (1992-03-01), Walker
patent: 5988925 (1999-11-01), Baggett

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