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Патент USA US2123609

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July 12, 1938.
‘
R, MITCHELL
, 2,123,609
ANVIL FOR STAPLING MACHINES
Filed June 26, .1936
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ATTORNEYS
2,123,609
Patented July 12, 1938
UNITEDv STATES PATENT OFFICE
2,123,609
ANVIL FOR. STAPLING MACHINES
Robert Mitchell, Detroit, Mich.
Application June 26, 1936, ‘Serial No. 87,435
2 Claims. (Cl. 1-49.)
This invention relates to anvils or clincher bars
of a type particularly adapted for use with con
ventional, hand operated stapling or tacking ma
chines.
The primary object of the present invention is
Cl
to provide an elongate anvil or clincher bar which
is so designed as to p ermit the use of a conven
tional tacking or stapling machine, particularly
cover parts during operation of the stapling or
tacking. device.
With the above and other ends in view the in
vention is more fully disclosed with reference to
the accompanying drawing, in which
Figure 1 is a perspective view of a box with the
present anvil associated therewith;
Fig. 2 is a side elevation of the anvil and a
tacking or stapling device;
the hand operated type, for the purpose of secur
Fig. 3- is a section taken on the line 3-—3 of 10
ing together overlapping flaps or cover parts of Fig. 2, and
v
various sizes of cardboard boxes, paper cartons
Fig. 4 is a cross section of flaps or cover parts
anvil
is
constructed
and the like. To this end, the
secured together by a staple.
in long, slender form and of a length whereby it
Like characters of reference are employed
t
the
overlapping
flaps
or
is adapted to suppor
throughout to designate corresponding parts.
cover
parts
on
boxes
of
various
sizes
throughout
The numeral l designates an anvil of elongate
15
the entire width thereof, and in addition to sup
form having a pair of grooves 2 in the top surface
porting the flaps or cover parts includes means thereof, the grooves being of arcuate section and
for clinching the ends of the staples or tacks extending parallel to one another throughout the
which are driven through such overlapping ?aps entire length of the anvil, parallel to the sides 20
or cover parts by the stapling machine.
thereof. The grooves are provided for the pur
Another object of the invention is to provide pose of clinching tacks or staples. A clamping
an anvil of the character referred to in the pre
bar 3 has a substantially U-shaped formation 4 at
ceding paragraph with means for clamping the one end‘ thereof pivotally secured by pins 5 to the
overlapping ?aps or cover parts ?rmly together anvil adjacent one end thereof. Adjacent its
other end the anvil has an aperture 5 into which
25 whereby the staples or tacks may be easily driven
therethrough. To thi s end, the anvil is provided a rigid pin 1 on the clamping bar 3 is adapted. to
with a pivoted clamping bar against which project. In the drawing the pin 1 is shown as
manual pressure may be applied to- clamp the projecting into the aperture 6 and with the parts
overlapping ?ap or cover parts against the anvil. in this position the pin 1 functions to hold the 30
the overlapping parts against the end 8 of the clamping bar from lateral displace
30 By so holding
anvil the clinching op eration may be more easily ment with respect to the anvil and the clamping
performed and the staples or tacks will be proper
bar and to thus hold it in a position with its side
ly disposed to provide an efficient holding action. edges parallel to the side edges of the anvil and
Another object of the present invention is to parallel with the grooves 2.
Oneedge of the clamping bar 3 has an integral
provide an anvil of the character referred to
angularly extending portion 9, the portion 9 ex
above embodying a clamping bar which also func
tions in the nature of a straight edge to guide tending perpendicular to the plane of the clamp
the movement of the stapling or tacking machine ing bar and perpendicular to the top surface of
with respect to the anvil so that the staples or the anvil. With the parts positioned as shown the
portion 9 constitutes a guide surface for a stapling
4 O tacks driven thereby will be uniformly and
properly spaced in relation to the clincher grooves or tacking device as will also be hereinafter de
scribed. At its top edge the guide portion 9 has
in the anvil and with respect to the edges of the an outwardly directed ?ange l0 providing a re
overlapping ?aps or cover parts of the boxes
45
tainer surface as will hereinafter appear.
or cartons. This feature is desirable in that it
A tacking or stapling machine of the hand op
4 avoids the placing of the staples 0r tacks too
close to the edge of one of the overlapping parts erated type is generally designated by the
H. Such machines are well known in
and insures su?icient material between the staples numeral
the art and are available on the market. They
or tacks and the edges of the overlapping parts to
are operated by placing the machine ?rmly on
prevent tearing away of such edges.
the object to be tacked and then pressing down
5O
of
the
present
invention
is
Still another object
wardly upon the operating handle, thereby caus
to provide an anvil o f the character referred to ing the machine to deliver a staple or tack. In
above with a clamping and guiding bar embody
order to insure ?rm engagement between the ma
ing means for holding a stapling or tacking de
chine I l and the objects to be tacked the machine 55
vice in ?rm contact with overlapping ?aps or
55
10
2
.
2,123,609
illustrated is provided with a lateral, hook-like
projection I2 on one side thereof, or in some
cases there may be a lateral projection I2 on both
sides thereof in cases where it is desirable that
the machine be moved in either direction with
respect to the anvil.
In using the present anvil it is placed across
the top‘ of a box or carton I3 and the clamping
bar 3 is pivotally moved to‘ a position leaving
stapling devices which have no parts, such as
the lateral projections I2, for engaging the re
tainer portion I0. In such cases the retainer
portion I0 may be dispensed with, or it may
be retained and its edge relied on to function as Cl
a guide surface in the manner of the guide
portion 9.
By means of this invention a very tight and
the top of the anvil entirely exposed. The ?aps compact package may be produced, due to the
or cover parts ‘I4 are then folded over the anvil fact that the box ?aps or cover parts are held 10
so that they rest in overlapping relation there 7 ?rmly together by the clamping bar.
Although a speci?c embodiment of the inven
upon. The clamping bar is then moved pivotallyv
to the position shown in Fig. 1 where it rests upon tion has been illustrated and described it will be
15 the flaps I4 and where the pin 1 projects into understood that various changes may be made
the aperture 6. Manual pressure is then applied within the scope of the appended claims without 15
departing from the spirit of the invention, and
on the end 8 of the clamping bar so that the over
such changes are contemplated.
lapping ends of the ?aps are clamped ?rmly to
What I claim is:—
gether and ?rmly pressed against the anvil I.
1. A device for supporting parts to be secured
The stapling machine II is then placed on top
togetherv and for clinching the securing elements 20
of the flaps I 4, with its lateral hook-like pro
jection I2 beneath the retainer ?ange III and with which secure them together, said device com
prising an elongate anvil, a bar pivoted at one
the side of the machine against the guide por
end on said anvil and adapted by swinging move
tion 9. The machine II is then manually actu
ment and application of manual pressure on the
25 ated to drive a staple through the overlapping
flaps, and because the guide portion 9 properly free end thereof to clamp the parts to be secured
disposes the machine H with respect to the anvil on said anvil, said bar having a straight edge
grooves 2, the arcuate surfaces of the latter when thereon for guiding the movement of a device for
engaged by the staples so driven cause the ends
I6 thereof to be clinched, as illustrated in Fig. 4.
By moving the machine I I and repeating the actu
ation thereof at intervals a straight row of staples
may be driven through the overlapping ?aps I4
and clinched. After the flaps I4 have been se
35 cured together by a sufficient-number of staples
the clamping bar is pivoted away from the anvil,
the anvil is withdrawn from beneath the ?aps
I4 and placed across the top of the same at right
angles to the position shown. The ?aps I5’ are
40 then folded across the anvil, the clamping bar
restored to its clamping position, and the above
described stapling operation is repeated.
In order to insure proper functioning of the
stapling device it is necessary that it be held
in ?rm contact with the parts being stapled. The
present device assures such ?rm engagement by
provision of the retainer portion I 0 against which
the lateral projections I2 engage, the portion I0
functioning to hold the device ?rmly against the
HO flaps at all times when the pin 1 is received in
the aperture 6. If the clamping bar 3 is not held
down with sufficient pressure the pin ‘I will slip
from the aperture and the operator thus becomes
aware that the parts are not properly disposed
for the stapling operation. However, it is be
lieved that the invention is not con?ned as to
novelty to this retainer portion on the clamping
bar and it may also be used successfully with
driving securing elements through said parts,
and means on said bar for holding said device
in ?rm engagement with said straight edge and 30
said parts, said last named means comprising a
?ange on the edge remote from said straight edge,
said flange terminating at a point in the length
of the bar spaced from the free end thereof.
2. In combination, an elongate anvil, a clamp 35
ing bar pivotally connected at one end to one
end of said anvil, means on the other ends of
said anvil and clamping bar respectively adapted
to be interengaged by swinging movement of said
bar and adapted to be held engaged by manual
pressure on said bar, means on the free end of
said bar for receiving manual pressure to clamp
parts to be secured together against said anvil,
said bar having a straight edge, a stapling device
having a retainer thereon, and a guide surface
on said bar adapted to be slidably engaged by 45
said retainer and adapted when engaged to hold
said stapling device in contact with said straight
edge and to transmit at least a portion of the
manual pressure from said bar to said stapling
device to hold the latter in ?rm engagement with 50
the parts to be secured, said guide surface termi
nating in spaced relation to the free end of said
clamping bar whereby the retainer of said stapling
device may be slipped thereon while manual pres
55
sure is being exerted upon said clamping bar.
ROBERT MITCHELL.
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