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Патент USA US2120149

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June 7, 1938.
|_._ w. KARLEN
DEVICE
FOR FASTENING
'
SHEETS
'
2,120,149
I
7
Filed March 25, 1935
INVENTOR.
BY
'
-~
'
LW KHRLEN '
P/
.
.
ATTO
EY.
'
Patented June 7, 1938
% 2,120,149?“
PATENT
UNITED
2,120,149‘
DEVICE FOR FASTENING SHEETS
Louis W. Karlen, Des Moines, Iowa
Application March 25, 1935, Serial No. 12,886’
3 Claims. (Cl. 129-25)
This invention relates to sheet fasteners and
more particularly to fasteners that are usually
permanently attached to a backing sheet.
The principal object of my invention is to pro
5 vide a two-piece sheet fastener that may be easily
and quickly assembled for use.
A further object of this invention is to provide
a two-piece sheet fastener that when once as
sembled for use will be yieldingly held against
10 accidental detachment.
A still further object of my invention is to
provide a detachable two-piece sheet fastener
that successfully holds the sheet engaging and
retaining arms against undesirable movement
15 during the placing or removing of the sheets.
A still further object of this invention is to
provide a sheet fastener that permits the selec
tion of various length attachable sheet holding
arms.
20
A still further object of my invention is to pro
vide a sheet fastener of two parts that is of
exceptionally thin construction and one that will
not undesirably engage other folders in a ?ling
cabinet when the folder to which it is secured
25 is being removed from or placed in the ?ling
cabinet.
A still further object of my invention is to pro
vide a sheet fastener of two parts that is eco
nomical in manufacture and durable in use.
These and other objects will be apparent to
30
those skilled in the art.
My invention consists in the construction, ar
rangement, and combination of the various parts
of the device, whereby the objects contemplated
35 are attained as hereinafter more fully set forth,
pointed out in my claims, and illustrated in the
accompanying drawing, in which:
Fig. 1 is a top plan view of my fastener secured
to a backing sheet.
Fig. 2 is a back view of my fastener and more
fully illustrating its construction.
I will now describe in detail the preferred form
of construction of my two-piece sheet fastener.
Obviously, many other forms can be used to ac
45 complish the desired results.
The one shown,
however, will illustrate how the many troubles
experienced heretofore in sheet fasteners have
been eliminated.
In the drawing, I have used the numeral ill to
50 designate an ordinary backing sheet to which my
fastener may be attached.
I have used the nu
meral II to designate the ?at base portion of
the fastener. This base II has four pointed ear
portions l2 integrally formed at the four corner
55 ends respectively of the base. These ears I2
always extend transversely of the longitudinal
axis of the sheets being held, as shown in Fig. 1.
To secure this base H to a backing sheet l0 it is
merely necessary to place the base II at the back
of the backing sheet I 0 and force the pointed
ears l2 through the sheet after which the ears
are clinched inwardly, as shown in the drawing.
In most instances, openings are provided in the
backing sheet to accommodate the pointed ears.
By the ears 12 extending transversely of the back 10
ing sheet and sheets being held, the complete
folder may be placed in or removed from a ?ling
cabinet without danger of snaring another folder.
This is possible, as the base member when so
constructed, has no sharp corners, hooks, or free 15
marginal edges that might undesirably engage
another folder.
The numeral I4 designates the usual bendable
bar for piercing and holding sheet members to
the back sheet Ill. The numeral l6 designates 20,
a bridge cut in the central portion of the base
H and raised upwardly to provide an arch.
When my fastener is assembled, this arch l6 ex
tends upwardly through the backing sheet lll as
shown in Fig. 1 for receiving the bar H. In 25
order that this bridge or arch portion will operate
successfully it is necessary that it be of specific
design.‘ A study of the drawing will show that
I have made this bridge [6 comparatively narrow
at its center in order that there will be a sub
30
stantial amount of the ?at base member H back
of the central portion of the bar I4, as shown
in Fig. 2. This construction permits a very small
opening from which the bridge I 6 is cut and there
is no danger of the bar I 4 bending on one center
line and tending to pass through the opening
under the bridge l6 when the two outer ends of
the bar 14 are bent upwardly to receive the sheet
members. The numeral l5 designates two down
wardly extending projections on the bar i4.
These projections l5 snap into the opening under
the bridge l6 when the bar I4 is slid into proper
position under the bridge [6. -
Some changes may be made in the construc
tion and arrangement of my improved device for 45
fastening sheets without departing from the real
spirit and purpose of my invention, and it is my
intention to cover by my claims any modi?ed
forms of structure or use of mechanical equiva
lents which may be reasonably included within
their scope.
I claim:
1. In a sheet fastener, a substantially ?at one
piece base member having an arch out from its
area and extending above its general top surface; 55
2
2,120,149
said arch and the opening in the base member
from which it is formed having a decreased width
near the center of their lengths, a plurality of
bendable ears on said base member for securing
said base member to a backing sheet, and a
manually bendable bar member mounted on said
base member by extending below said arch.
2. In a sheet fastener, a base member having
an arch cut from its area and extending above
10 its general top surface, a means for securing said
base member to a sheet, a manually bendable bar
member mounted on said base member by ex
tending below said arch, and a projection on said
bendable bar member below said arch and engag
ing the opening in said base member from which
said arch is formed.
3. In a sheet fastener, a baseomember having
an arch cut from its area and extending above
the surface of that portion of the base member
adjacent the portion from which said arch is out;
said arch and the opening in the base member
from which it is formed having a decreased width
near the center of their lengths, and a manually 10
bendable bar member detachably extending be
low said arch.
LOUIS W. KARLEN.
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