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Патент USA US2128478

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Aug. 30; 1938.
A. H. SCHMIDTKE
2,128,478
STAPLING MECHANISM
Filed March 20, 1937
3 Sheets-Sheet 1
Aug. 30, 1938.
2,128,478
A. H. SCHMIDTKE
STAPLING MECHANISM
Filed March 20, 1937
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5 Sheets-Sheet 2
Aug. 30, 1938.
I
A. H. SCHMIDTKE I
2,128,478
STAPLING MECHANISM
Filed March 20, 1937
3 Sheets-Sheet 3
. @z'werz/ow:
Patented Aug. 30, 1938
2,128,478
UNITED STATES PATENT OFFICE
STAPLING MECHANISM
, Albert H. Schmidtke, St. Joseph, Mich., assignor
to St. Joe Machines, Inc., St. Joseph, Mich., a
corporation of‘ Michigan
Application ‘March v20, 1937, Serial No. 132,018
12 Claims.v (Cl. 1-13.6)
This invention relates to mechanisms or ma‘
chines for making and driving staples, and-has
reference more particularly to facilities for pro
viding angular displacement of the staples. For
5 example in double stapling machines in which
two or more staples are formed from.‘ wire upon
each operation and simultaneously driven into
the work, the invention may be employed to drive
the staples at an angle to the plane of operation
10 of the staple forming and driving member and at
an angle to one another, if desired.
'
ble or other plural design angularly to displace
the staples simultaneously'driven.
A'still further‘object is to provide for a simple
and inexpensive‘ change in practically any sta
pling head which will impart to the staples prac- 5
tically any degree of twist which may be desired.
For a fuller understanding of the nature and
objects ofthe invention reference may be had to
the following detailed description taken. in con
junction with the accompanying drawings, in 10‘
which
As ordinarily designed such machines are
adapted to position simultaneously driven staples
in a straight line. In certain applications, how
15 ever, a circular or other non-straight line form of
positioning is much to be preferred. The con
struction of basket covers affords an’ example.
There the staple should preferably be positioned
along a circle coinciding with the center ‘of .the
20 relatively thin wooden hoop to the edge of which
the staples serve to ?x the panel or staves which
form the cover top.
1
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1
.
Prior plural stapling machines for straight
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Fig. -1 is v,a view in front elevation of one well
known ‘form of double stapling head modi?ed in
accordance with the present invention to effect
an angular displacement between the staples 15
which it drives;
I
Fig. 2 is a sectional viewtaken along line 2-2
of Fig. 1 showing the arrangement of the working
parts ‘of one of the two similar stapling units com
prised by the head of Fig. 1;
,- g
20
Fig. 3 is a top plan view of a work piece shown
in the form of a wooden basket cover (also indi
cated in section. inthe lower portion of Fig.2)
line or parallel linev stapling are not suitablefor into which angularly displaced staples have been
25 this purpose as the staples in such cases extend driven by the mechanism of Figs. 1 and 2; '
0.5
more or less crosswise of the hoop and are-likely
Fig. 4 isa representation in inverted perspec- ’
to cause objectionable splittingof the hoop mate-~
' tive of the staple forming and driving members of
rial, and heretofore in order toprovide or adapt a one of ‘the two stapling units comprised by the
machine for a desired angularity of stapling a
30 special construction of the entire stapling vvhead
Fig.v 5 is a similar view of the staple driving ‘30
assembly was required. The present invention is member
only of the assemblage of Fig. 4; and.
intended to overcome the above discussed dis
Y. Figs. 6, 7 and 8 are representations of the bot
advantages of previous machines and to provide
headofFig.-1;
further advantages to be pointed-out hereinafter.
35
The invention is also applicable to single unit
stapling machines which may be required to drive
staples in positions of_ differing angularity to the
plane of operationof ‘the staple forming and driv
ing members.
40
One object of this invention is to provide fa
cilities whereby ordinary stapling mechanisms
may be readily adapted to drive staples at selected
angles. Another object is .to provide an improved
plural stapling machine which is capable of posi
45 tioning simultaneously driven staples along the
arc of acircle or in other non-straight line man
ner.
»
A further object is to ‘make-ready provision for
adjusting the angular position of the staples
50 driven by a given machine.
An additional object is to broaden theusefulness
and range of application of stapling machines at
presentin use in industry.
_
A further and more speci?c object is to adapt
55 prior art stapling machines of conventional dou
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tom of the stapling head of Fig. 1~as viewed from
line 6—-6 of that?gure showing three progress
ing stages in the staple forming operation ef- 35
fected by the illustrated mechanism.
Referring to the drawings in which Fig. 1 repre
sents the stapling head and mounting only of one
well known form of machine to which the im
provements of the present invention have been 40’
applied, reference character l0 designates a
bracketsuitably carried by the machine frame
(not shown) which bracket serves to support the
stapling head represented in the central portion
of the ?gure. Character [2 designates a driving 45
rodsurrounded by. and free to slide throughthe
upright portion of bracket l0 and which is re
ciprocated vertically by suitable mechanism (also
not shown) operatively connected with its lower
end. A bracket or-driving head I4 is attached to 50
the upper end of the-rod l2 and serves to actuate
the .movingparts of the stapling head.
The head structure represented is of a well
known. double design comprising two similar
staplin‘glunits l6 and .18. It consists of a housing 55
2,128,478
2
20 best shown by the bottom views of Figs. 6 to 8
which is rearwardly recessed to accommodate the
working parts of the units. Cover plates 22 serve
to close the front side of the housing and are
secured thereto by screws or other suitable means.
Reference character 24 designates the wire from
which the staples are formed and which is fed
into one side of each of the two stapling units
drawn from the work piece and it together with
the forming member 34 is eventually returned
to the upper limit of travel. This upper move
ment allows the loop bar 32 again to be pro
jected under the action of spring 38 into the
space below the feed wire 24. A cycle of staple
forming and driving operation has now been
completed and the parts of the two stapling head
in the represented or other equivalent manner.
10
The work piece 26-28 into which the machine
functions to drive staples 30 in pairs (see Fig. 3)
is supported beneath the stapling head in the
general position indicated in Fig. 2. The partic
ular work piece shown is a wooden basket cover
15 in which the thin panels 26 forming the cover
top are to be secured by the staples to the hoop
28 which constitutes the cover rim. The struc
ture for supporting the work piece has not been
represented but may take the form of a plat
form, rotary or otherwise, which permits the
units are again ready to advance downwardly
to form and drive another pair of staples.
The present invention concerns itself with
modi?cations in. stapling machines typified by
the above illustrative structure, which modi?ca
tions cause the staples to emerge from the ma
work piece to be advanced between successive
operations of the stapling head.’
i
chine units at practically any desired degree of 15
angular displacement or twist. Plural machines
altered in accordance with the teachings of the
present invention are in consequence rendered
capable of driving staples along the arc of a
circle or in other predetermined angular relation. 20
Single unit machines are enabled to alter the
angular position of the staples which they drive.
‘
The mechanism of each of the two stapling
units l6 and H3 includes a retractible loop bar 32,
a bifurcated staple forming member 34 and a
staple driving member 36. In operation of the
unit the loop bar is normally held in the posi
tion shown in Figs. 2, 6 and 7 by a'spring 38.
Upon the upward stroke of the moving parts a
30 length of wire 24 is projected into the space
above the loop bar under the action of a feed
wheel 48. This wheel is advanced by a ratchet
(not shown) which is operated by a rod 42.
As the actuating head 14 moves downwardly,
These advantageous results are effected by
changing the design of only two partsin each
of the stapling ‘units to which the invention is
to be applied, namely the forming member 34
and the‘driving member 36. All other parts of
the unit mechanism may remain unchanged. 3
the staple forming and driving members 34 and
36 of each unit are advanced simultaneously
through direct connections which respectively
include a driving bar 44 and a latch 46. The
forming member ?rst cuts off a length of the
40 wire 24 and upon further downward advance
ment functions to bend the ends of this length
over the loop bar 32, thereby forming the staple.
At this point in the downward travel of the
parts an inclined section 46 of the driving bar
45 44 moves into contact with the cooperating sur
face 48 of a projection carried by the loop bar
in the manner shown in Fig. 2. Further down
50
ward movement forces the loop bar intothe re
tracted position shown in Fig. 8. The staple
previously formed by having been bent thereover
is now retained between the bifurcations of the
forming member in a position ready to be forced
into the work piece.
Slightly before the ends of the forming mem
55 ber have advanced into contact with the work
piece, a position indicated by the dotted outline
of Fig. 2, a pin 48 contacts an inclined surface
50 of the upper front cover plate 22 and acts to
force the lower end of the latch bar 46 outwardly
60 against the restraining action of a spring 52.
This interrupts the direct driving connection to
the forming member 34 and during the remainder
of the downward stroke a compression spring
54 is brought into action ?rmly to hold the form
" ing member in contact with the work piece, caus
ing it to serve in effect as a clamping member.
The driving member 36 now comes into action
and functions positively to push the staple, held
between and guided by the bifurcated portions
of the forming member 34, into the work piece.
The completion of this driving operation marks
the end of the downward stroke of the moving
parts of the stapling units.
As the actuating head l4 moves upwardly upon
its return stroke the driving member is with
The nature of the contemplated changes is
best indicated by Figs. 2, 4 and 5. Considering 30
?rst the forming member 34 which'is shown in
verted in Fig. 4, the inner surfaces of the bifur
cated portions of this member are provided with
staple leg guide grooves 58 and 66 which are
oppositely displaced in the direction of thickness .
of the member. The ends of the member bifure
cations likewise are provided with cooperating
notches 62 and 64 which are similarly displaced.
These notches serve to guide the staple wire into
the'grooves 58 and 60 at the time when the wire
is bent by the forming member over the loop bar.
As in prior constructions the grooves 58‘ and 60
serve to guide the legs of the completely formed
staple while the driving member 36 is advancing
to force the staple from between the forming
member bifurcations and into the work piece.
As is apparent from the showings of Figs. 4 and
5, the driving member 36 is provided with side
ribs 66 and 68 which are displaced in the same
manner as are the guide grooves 58 and 60 of
5-01
the bifurcated forming member into which these
ribs slidably ?t.
'
The result of these design modi?cations is best
shown by Figs. 6 to 8 inclusive. During the up
ward stroke of the stapling unit parts depicted
by Fig. 6 the wire 24 is fed into each of the units
in the usual manner. At the point in the down
ward stroke of the parts at which the wire is cut
off by the forming member 34 and immediately
thereafter the descending beveled faces respec 60
tively at the far side of. the groove 62 and at the
near side of the groove 64, as viewed in Fig. 4
impart an angular displacement to the cut off
length 30' somewhat as shown in Fig.- '7, at which
time the extremities of said portion 30’ are swung
in opposite directions respectively against the
beveled faces at the near side of the groove 62
and at the far side of the groove 64 as’viewed
in Fig. 4 and slide outwardly across these re
spective faces, which at the same time are de~
scending, with the result that as these wire ends
slide outwardly on these ‘descending, faces and
as the center ‘of the wire length 30’ engages the
loop bar 32 and is held thereby against descend
ing, the wire ends are sprung slightly downwardly 75
2,128,478
thereby imposing a slight bending strain which
is followed immediately by the further bending
of the wire length as illustrated in Fig. 8 into the
staple form by the continued downward move
UL ment of the legs 34 of the staple former, in which
form the staple is ready to be driven into the work
piece. There the amount-of angular‘ displace
ment represented is such that the staples as
, driven lie along the arc of a circle 10.
If the
10 stapling machine were intended to secure to
gether the parts of the basket cover 26—28
shown in Figs. 2 and 3, this circle should prefer
ably coincide with the center of the rim hoop 28
of the cover in order to insure that all of the
staple legs ‘will be equally spaced from the sides
of the hoop material.
From the foregoing it will be apparent that
practically any conventional plural stapling ma
chine may be adapted to'drive the staples in
angularly displaced relation merely by substitut
ing for the forming and driving members of each
unit a former and a driver having grooves and
ribs displacedly located in the manner taught by
the present invention. It will also be evident that
25 by carrying in stock forming and driving mem
bers in which the groove and rib displacements
are of graduately different magnitudes a given
machine may be adapted. to provide various de
grees of staple driving displacement. The inven
tion is therefore one of high utility and broad
application.
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‘
Although the invention has been shown and
described in connection with a double head type
of stapler, it will be apparent that it may also
40
be applied to 'single unit stapling machines with
equal facility to impart twist to the driven staples.
From the foregoing description of the individual
stapling units comprised by the double machine
represented in the drawings, it will be seen that
the expedient of the present invention makes this
possible in a very practicaland economical way.
Since certain changes may be made in the con
struction and different embodiments of the in
vention can be made without departing from the
45 scope thereof, it is intended that all matter pre—
viously presented shall be interpreted in an illus
trative and not in a limiting sense.
I claim as my invention:
1. A mechanism for forming and driving
50 staples comprising means for feeding wire there—
into, a loop bar retractably positioned between
the fed wire and the work piece into which staples
are to be driven, a bifurcated forming member
having the bifurcations thereof operable in the
55 plane in which the fed wire is initially positioned,
said member being adapted when advanced to
3. .
bar in- a position-angularly displaced fromv said
plane and'a driving member slidably mounted in
the trailing‘portion vof-the forming member and
adapted when‘advanced to urge the ‘staple thus
formed into the work piece in the said position of
angular
displacement.
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3. .A staple forming and drivingm'achine hav
ing a head mechanism comprised :of a stapling
unit which includes means for feeding wire there
into, a loop bar retractably positioned adjacent 10
> the fed wire, a'bifurcated staple forming member
having the bifurcations thereof operable ‘in the
plane in which the fed wire is initially positioned,
said‘member being adapted when advanced to
cut off a length of the wire and having wire
engaging portionswhereby the cut off length of
wire is shifted at an'angle to said plane and then
bent in said shifted position over the loop bar,
and a driver for urging the staple thus formed
into a. work’ piece in the saidposition of angular
shift.
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4. ma multi-unit mechanism'for forming and
simultaneously driving a plurality of. staples in
positions of relative angular displacement, the
combination of a stapling unit having means for 25
feeding wire thereinto, a loop bar retractably
positioned between the fed wire and the work
piece into'which staples are to be driven, a bi
furcated forming member adapted when :ad
vanced to 'cut off a length of the wire-and having
the bifurcations thereof operable‘ in the plane in
which the fed wire is initially positioned,‘ said
member having wire-engaging'portions whereby
the cut off length of wire is positionedrin angu
larly-displaced' relation to said plane and then
bent over the loop barlin said. "displaced ‘position,
and a driver for urging into the ‘work piece the
staple thus formed in its said ‘position of "angular
displacement.
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5. In a mechanism for forming“ and simul
taneously ‘driving a plurality of- staples,v into a
work piece in positions of relative angular dis
placement, the combination of. a plurality of.
stapling units each of which comprises means for
feeding wire thereinto, a loop bar retractably
positioned between the fed wire and the work
piece, a bifurcated forming member adapted
when advanced to cut off a length of the wire and
having the bifurcations thereof operable in the
plane in which the fed wire is initially positioned,
said member having wire-engaging portions 50
whereby the cut off length of wire is positioned in
angularly displaced relation to said plane and
then bent over the loop bar in said displaced
position, and a driver for urging into the work 55
piece the staple thus formed in its said position
cut off a length of the wire and having wire
of angular displacement.
engaging portions whereby the cut off length of
wire is positioned in angularly displaced relation
6. In a staple forming and driving mechanism,
comprising means for feeding wire thereinto, a
retractable loop bar, a bifurcated forming mem 60
60 to said plane and then bent over the loop bar in
’
said displaced position, and a driver adapted to
urge the staple thus formed into the work piece
in the said position of angular displacement.
2. In a mechanism for forming and driving
65 staples, the combination of an elongated housing,
means for feeding wire thereinto in a transverse
direction, a loop bar retractably positioned in an
open end of the housing between said wire and
the work piece into which staples are to be driven,
a bifurcated staple forming member slidably
mounted in the housing and having the bifurca
tions thereof operable in the plane in which the
, ber for cutting off a length of said wire and bend
fed wire is initially positioned, said member
having wire-engaging portions adapted to out off
said plane and correspondingly displaced ribs on
the cooperating outer surfaces of the driver en
gaged in said grooves.
75 a length of the wire and to bend it over the loop
15
ing the ends thereof over the loop bar thereby to
form the staple, said member having the bifur
cations thereof operable in the plane in which the
fed wire is initially positioned and a driver slid 65.
ably mounted between the trailing portions of the
forming member bifurcations for urging the
staple into a work piece, the combination of
means for positioning the staple in angularly dis
placed relation to said plane comprising staple leg 70
guide grooves in the inside surfaces of the form
ing member bifurcations oppositely displaced from
75
2,128,478
4
~ '7. In a staple forming and driving mechanism
comprising means for feeding wire thereinto, a
retractable loop bar, a bifurcated forming mem
ber for cutting oif said wire and bending the ends
of the cut length over the loop bar thereby to
form the staple said member having the bifurca
tions thereof operable in the plane in which the
fed wire is'initially positioned, and a driver for
urging the staple into a work piece, the combina
tion of means for positioning the staple in angu
larly displaced relation to said plane comprising
a provision on the inside surfaces of the forming
member bifurcations of laterally extending staple
leg .guide grooves which are oppositely displaced
from said plane.
8. In a staple forming and driving mechanism
comprising means for feeding wire thereinto, a
retractable loop bar, a bifurcated forming mem
ber for cutting off said wire and bending the
20 ends of the cut length over the loop bar thereby
to form the staple said member having the bi
furcations thereof operable in the plane in which
the fed wire is initially positioned, and a driver
for urging the staple into a work piece, the com
25 bination of means for positioning the staple in
angularly displaced relation to said plane com
prising a provision on the inside surfaces of the
forming member bifurcations of laterally extend
ing staple-leg guide grooves which are oppositely
30 displaced from said plane, and a provision on the
ends of the forming member bifurcations of
notches arranged to guide the staple wire into
said grooves as it is being bent over the loop bar.
9. For use in a machine adapted to form staples
from
wire and to drive them into a work piece in
35
a position angularly displaced from the plane of
operation of the forming and driving parts, a bi
furcated staple forming member having on the
opposing inner surfaces of. its bifurcations later
ally extending staple-leg guide grooves which are
40 oppositely displaced in the direction of member
thickness.
10. For use in a, machine adapted to form
staples from wire and to drive them into a work
piece in a position angularly displaced from the
plane of operation of the forming and driving
parts, a bifurcated staple forming member having
on the opposing inner surfaces of its bifurcations
laterally extending staple-leg guide grooves which
are oppositely displaced in the direction of mem
ber thickness and also having on the ends of the
bifurcated portions correspondingly displaced
10
notches which serve to guide the staple wire into
said grooves during the staple forming operation.
11. For use in a machine adapted to form
staples from wire and to drive them into a work
piece in a position angularly displaced from the 15
plane of operation of the forming and driving
parts, a staple driving member having on two of.
its opposite outer surfaces laterally extending
ribs which are oppositely displaced in the direction
20
of member thickness.
12. In a staple forming and driving device, the
combination of a pair of staple forming parts, an
abutment at opposite sides of which said parts
are respectively operable to bend a length of wire
in staple form against and along the opposite 25
sides of said abutment, said abutment and staple
forming parts being relatively movable to release
the staple formed wire from said abutment, a
wire feed operable to advance said length of wire
to an initial position in the plane of operation of 30
said staple forming parts between the said parts
and said abutment, a driver which ejects the
staple formed wire from between said pair of
staple forming parts after the forming operation
and release of the staple formed wire from said 35
abutment, and means operable after the wire
feeding operation to displace the fed wire at an
angle to the aforesaid plane prior to the bend
ing thereof against and along the opposite sides
of said abutment.
_
ALBERT H. SCHMIDTKE.
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