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Патент USA US2041523

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May 19, 1936. »
'E c BUNNELL
STAPLING DEVICE
Filed F'ebv 18, 1935
l2,041,523
Patented May 19, 1936
. 2,041,523
UNITED STATES PATENT CFFICE
2,041,523
STAPLING DEVICE
Earl C. Bunnell, Stratford, Conn., assignor to
Neva-Clog Products, Inc., Bridgeport, Conn., a
corporation of Connecticut
Application February 18, 1935, Serial No. 7,004
8 Claims. (Cl. 1_3)
type, an object being to provide a stapling device
which may be selectively operated to either bend
tional view of the staple driving end of the device
showing the same in engagement with the anvil,
and showing a staple driven and with its legs bent
inwardly, being taken along the line 5-5 of Fig. 6.
5 » the legs of the st-aple inwardly, such a bent staple
being usually referred to as a permanent staple,
or to bend the legs outwardly, such a staple being
usually referred to as a spread or temporary
Fig. 6 is an enlarged front elevation of the
parts as shown in Fig. 5.
Fig. '7 is an enlarged front elevation of the parts
as shown in Fig. 5 in relation to the grooves for
The present invention relates to an improved
stapling device, particularly of the so-called desk
staple.
Various means have heretofore been employed
for accomplishing this purpose, as for instance
a slidable anvil or an anvil having a hinged flap
upon which the spreading grooves were provided,
but these have required manipulation of the anvil
15 with consequent wear and looseness which was
objectionable because of the desirability of main
taining the anvil as a solid immovable part in
order to obtain the best stapling results. It is
proposed in the present invention to provide
20 means whereby the upper portion of the staple
device may be bodily shifted between two posi
tions to bring the staple driving means into reg
ister with anvil grooves respectively designed for
bending the staple legs inwardly and outwardly,
25 to the end that the anvil will at all times be solid
and free from movable parts.v Another object is
to provide such means which will not add mate
rially to the cost of the device.
Another object is to provide improved means
30 for securing the staple strip feeding spring, such
means being readily insertible and removable by
hand, and being entirely concealed in the as
sembled relation.
With the above and other objects in view an
35 embodiment of the invention is shown in the
accompanying drawing, and this embodiment will
be hereinafter more fully described with reference
thereto, and the invention will be finally pointed
out in the claims.
In the drawing:
40
Fig. 1 is a side elevation of desk type stapling
device, according to the exemplary illustrated
embodiment of the invention, the parts being
shown in position for driving the staples to bend
45 the legs inwardly.
Fig. 2 is a vertical longitudinal sectional view,
the parts being sho-wn in position for driving the
staples to bend the legs outwardly.
Fig. 3 is an enlarged fragmentary plan view of
50 the anvil portion of the device provided with
grooves for bending the staple legs inwardly and
outwardly.
Fig. 4 is a sectional bottom plan view taken
along the line 4-4 of Fig. 1.
Fig. 5 is an enlarged fragmentary vertical- sec
55
bending the staple legs outwardly, and showing
a staple driven and with its legs bent outwardly. 10
Fig. 8 is a vertical sectional View taken along
the line 8-8 of Fig. 2, and showing the means
for securing the staple feeding spring.
Fig. 9 is a perspective view of the clip employed
for securing the st-aple feeding spring.
Similar reference characters indicate corre
sponding parts throughout the several figures oi
the drawing.
Referring to the drawing, the stapling device
according to the exemplary embodiment of the 20
invention illustrated therein, comprises a base I0,
provided at its forward portion within a recess I I
with an anvil plate I2, provided near its forward
edge with a suitably shaped groove I3 adapted
to bend the staple legs inwardly, and provided 25
in rearwardly spaced relation thereto, and near
its rearward edge, with a pair of grooves I4-I4
adapted to bend the staple legs outwardly.
The base I0 is provided at its rearward edge
with upwardly projecting ears I5--I5 between 30
which the upper staple carrying and driving part
I6 o-f the Àdevice is pivotally and resiliently
mounted. For this purpose the part I6 is pro
vided at its rearward end with downwardly pro
jected ears I‘I-I'l, disposed between the ears 35
I5-l 5 of the base, and provided with slots I8-I 8
engaged by a pivot pin I9 mounted in and ex
tending between the ears I5---I5.
A yieldable supporting lever 20 is pivotally
mounted on the pin I9 between the ears I'I-I‘I
and projects beneath and engages the lower sur
face of the part I6, being pro-vided at its lower
portion with a shoulder 2l engaging the under
surface of the base Iû and a hook22 to which one
as5
end of a spiral spring 23 is secured, the other end
of the spring being secured to a hook 24 formed
on the under side of the base I0. It will be seen
that as downward pressure is applied to the upper
staple driving part I6 of the device the lever 20
yields to permit the material to be gripped be
tween this upper part and the base. The con
struction is also such that the upper part of the
device may be swung away from the base through
an arc of 1809, when it is desired to drive a staple
0.
2
2,041,523
Upon the under surface of the part I6 there is
secured a leaf spring 25 projecting rearwardly be
neath the pivot pin I 9 and bifurcated, as at 26, to
threading of the end of the spring, and before
assembling within the housing, the spring is
wound up and is then inserted within the housing
by engaging the sides of the clip 43 in the slots
4 I-4I. Thereupon the cover plate 45 is engaged
embrace the lever 20. The ends of the two sides
of the spring are each provided with an inverted
V-shaped formation, as at 21, which in one oper
ative position of the part Iâ engages forwardly of
over the housing and secured by a set-screw 48
screwed into the transverse portion 36 of the
frame member, the cover closing the ends of the
slots ¿là-_4I and retaining the clip therein. It
lO the pin I 9 to retain the pin at the rearward ends
will loe seen that in order to rernove the spring it
is only necessary to remove the cover plate
independently of the base without bending the
staple legs.
of the slots I8, and which in the other operative
position engages behind the pin I9 to retain the
pin at the forward ends of the slots I8. The V
shaped formation 21 also constitutes a cam for
The lower end of the forward wall of the mem
ber 39 is upwardly offset .and cut back to the inner
releasing the spring as the part I6 is shifted
wall of the plunger guideway as at 41, slightly
from one to the other of its operative positions,
the V-shaped formation ñrst springing from one
side to the other of the pin and then snapping
into position, the camming action being such as
to position and yieldably retain the part I6 snug
more than the thickness of the staple, so that
ly in one or the other of its two positions in re
lation to the pin. The length of the slots I8-I8
and the dimensions of the V-shape formation 21
is such in relation to the spacing of the anvil
grooves I3 and I 4--I4 that the shifting of the
part I6 from one of its operative positions to the
other brings the staple driver 28 into register with
when the staple is driven either with the legs
bent inwardly as shown in Fig. 6, or outwardly,
as shown in Fig. '1, there is no tendency for the
staple to become jammed in the guideway, either „
due to spreading or bending of the metal of the
bridge portion of the staple or to binding of
the outwardly bent legs with the end walls of the
guideway.
are in the usual strip form and are mounted upon
I have illustrated and described a preferred 25
and satisfactory embodiment of my invention but
it will be obvious that changes may be made
therein, within the spirit and scope thereof, as
defined in the appended claims.
Having thus described my invention what I 30
claim and desire to secure by Letters Patent is:
l. In a stapling device for inverted U-shaped
staples, a base part, a staple driving part, an an
vil carried by said base part having means adapt
ed to bend the legs of a driven staple inwardly 35
and means spaced therefrom adapted to bend the
legs of a driven staple outwardly, a pivot pin on
a staple carrier bar 29, being forced forwardly
one of said parts and slotted means on the other
one or the other of the grooves I3 and I4-I4.
As shown in Fig. 1 the part I6 is in position to
30 register with the groove I3 to bend the staple legs
of the staples A inwardly, and in Fig. 2 the part
I6 is in position to register with the grooves
I4-I4, to bend the staple legs outwardly. In
either position the pivotal action of the part I6
about the pin I9 is substantially the same.
The inverted U-shaped staples A to be driven
upon the bar by means of a staple feeder 30, of
40 inverted U-shape cross-section, mounted on the
bar 29, and having a handle member 3I secured
to its upper transverse portion and to which the
outer end of a coil spring 32 is secured, as at 33.
'I'he inner end of this spring is secured in the
45
whereupon the clip and spring may be slipped out.
forward housing portion of the part I6, this
portion consisting of upwardly extending side
plate extensions 34-34 within which there is dis
posed a frame member having side portions
35-35 and a diagonally disposed connecting por
tion 35a. The forward edges of the side portions
35-35 are bent inwardly, as at 36, to form a guide
for the rearward face of the staple driving plung
er 31, and the lower edges are turned inwardly,
as at 38-38, to form an upper guide surface for
the staple strip A. The side faces of the plunger
31 are guided by the inner faces of the side ex
tensions 34-34 and the front face is guided by
the transverse portion of a U-shaped member 39,
the sides of which are disposed at the outer sides
60 of the extensions 34-34. 'I'he sides of the mem
ber 39, the extensions 34-34, and the portions
35-35 of the frame member are all secured to
bether by a pair of transverse riveted cross-pins
40-40.
The side portions 35-35 of the frame member
65
are provided with rectangular shaped slots 4 I-4I
extending forwardly from the rearward edge of
said portions, the side portions 35-35 adjacent
the slots being inwardly offset, as at 42. The
70 clip 43 for securing the inner end of the spring
32 is adapted to be secured within these slots,
this clip being of U-shape form and being pro
vided in its transverse portion with a slot 44
through which the inner end of the spring 32 is
75 threaded, as clearly shown in Fig. 2. After
of said parts engaging said pivot pin, permitting
relative shifting movement between said parts 40
whereby the driven staple may be registered re
spectively with one or the other of said staple
leg bending means, and a spring carried by said
part having said slotted means having a eam
ming portion adapted to engage at one or the 45
other sides of said pin to yieldably retain said
parts in one or the other of their shifted posi
tions.
2. In a stapling device, a casing having side
walls, a staple strip guide, a staple strip feeder 50
movable on said guide, a spring for feeding said
strip feeder, said side walls having opposed slots
extending inwardly from the edges of said side
portions and open at one end, a spring clip mem
ber having side portions slidably engaged in said 55
slots and a transverse portion adapted to be se
cured to one end of said spring with a portion of
said spring wound about said transverse portion
and disposed between said side portions, and
means removably secured in relation to the edges 60
of said side portions and closing the open ends of
said slots to retain said clip.
3. In a stapling device, a casing having side
walls, a staple strip guide, a staple strip feeder
movable on said guide, a spring for feeding said 65
strip feeder, said side walls having opposed rec
tangular slots extending inwardly from the edges
of said side portions and open at one end, a spring
clip member having rectangular side portions
slidably engaged in said slots and a transverse 70
portion adapted to be secured to one end of said
spring with a portion of said spring wound about
said transverse portion and disposed between said
side portions, and means removably secured in
relation to the edges of said side portions and 75
3
2,041,523
closing the open ends of said slots to retain said
clip.
4. In a stapling device, a casing having side
Walls, a staple strip guide, a staple strip feeder
movable on said guide, a spring for feeding said
strip feeder, said side Walls having opposed slots
extending inwardly from the edges of said side
portions and open at one end, a spring clip mem
ber having side portions slidably engaged in said
10 slots and a transverse portion having a slot adapt
ed to receive and secure one end of said spring
with a portion of said spring wound about said
transverse portion and disposed between said side
portions, and means removably secured in rela
15 tion to said side portions and closing the open
ends of said slots to retain said clip. ,
5. In a stapling device, a casing having a pair
of spaced side portions, a staple strip guide, a sta
ple strip feeder movable on said guide, a spring
20 for feeding said strip feeder, said side portions
having opposed slots extending inwardly from the
edges of said side portions and open at one end,
a spring clip member having side portions slid
ably engaged in said slots and a transverse por
25 tion adapted to be secured tol one end of said
spring with a portion of said spring wound about
said transverse portion and disposed between said
side portions, means removably secured in rela
tion to the edges of said side portions and clos
30 ing the open ends of said slots to retain said clip,
and means disposed at the outer sides of said side
portions and enclosing and concealing said slots.
6. In a stapling device, a casing having a pair
of spaced side portions, a staple strip guide, a
35 staple strip feeder movable on said guide, a spring
for feeding said strip feeder, said side portions
having opposed slots extending inwardly from the
edges of said side portions and open at one end,
said side portions being inwardly offset contig
uous to said slots, a spring clip member having
side portions slidably engaged in said slots and a
transverse portion adapted to be secured to one
end of said spring with a. portion of said spring
wound about said transverse portion and disposed
between said side portions, means removably se
cured in relation to the edges of said side portions
and closing the open ends of said slots to retain
said clip, and means disposed at the outer sides
of said side portions and enclosing and concealing
said slots.
7. In a stapling device for inverted U-shaped
staples, a base part, a staple driving part, an
anvil carried by the base part having means
adapted to bend the legs of a driven staple, said
staple driving part having a staple guiding pas
sage including front and rear walls and end
walls, a plunger movable in said passage to drive
a staple therein, said front wall of said passage
5
10
15
20
terminating in upwardly oiîset relation to said
rear wall whereby the bridge portion of said sta
ple is unconfined at the front in its driven position
in relation toI said anvil.
’
8. In a stapling device for inverted U-shaped 25
staples, a base part, a staple driving part, an
anvil carried by the base part having means
adapted to bend the legs of a driven staple, said
staple driving part having a staple guiding pas
sage including front and rear walls and end walls, 30
a plunger movable in said passage to drive a sta
ple therein, said front and end Walls of said pas
sage terminating in upwardly offset relation to
said rear wall whereby the bridge portion of said
staple is unconñned at the front and ends in its 35
driven position in relation to said anvil.
EARL C. BUNNELL.
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