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Патент USA US2117742

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May 17, 1938.
F. POLZER
2,117,742
STAPLE DRIVING MACHINE
Filed April 27, '1935
2 Sheets-Sheet l
I
.25 1/25
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200.39 @
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ATTORN EYs _
_May17,1938.
F‘POLZER‘
_
I
-
2,117,742
STAPLE DRIVING MACHINE
Filed April 27, 1935
.2 Sheets—Sheet 2
ATTORNEYS.
‘
2,117,742
Patented May 17, 1938
UNITED STATES PATENT‘ OFFICE
2,117.7 42
STAPLE DRIVING MACHINE
Fridolin Polzer, South Norwalk, Conn., assignor
to The E. H. Hotchkiss Company, Norwalk,
Conn, a corporation of Connecticut
Application April 27, 1935, Serial No. 18,614
10 Claims. (01. 1-3)
This invention relates to new and useful im
provements in staple driving machines. An ob
ject of the invention is to provide a staple driving
machine which will not become clogged by sta
5 ples the crowns or legs or both of which are
crooked or out of proper alignment, but which
will properly align and drive such staples through
the machine substantially as though they were
straight or normal staples.
10:
Another object is to provide a staple driving
machine as indicated and which may be either
in the form of a stapler or a tacker, and if the
former, of either the desk or plier type.
Other objects and advantages will become ap
15 parent from a consideration of the following de
tailed description taken in connection with the
accompanying drawings wherein a satisfactory
embodiment of the invention is shown. How
ever, it will be understood that the invention is
not limited to the details disclosed but includes
2
all such variations and modi?cations as fall
within the spirit of the invention and. the scope
of the appended claims.
.
2
.
In the drawings:
Fig. 1 is a side elevational view, with parts
broken away, showing a desk type stapler con
structed according to the present invention;
Fig. 2 is an enlarged front elevational view of
the lower portion of the head of the machine;
30
Fig. 3 is a plan view showing typical crooked
crown staples or staples in which the crown or
top bar is inclined to the longitudinal axis of
the staple strip and the staple guide bar;
Fig. 4 is an elevational view showing typical
crooked leg staples or staples in which the prongs
C; Li
or legs are inclined from the normal vertical
position;
Fig. 5 is a sectional view taken substantially
along the line 5-5 of Fig. 2, with the staple driver
40 or plunger of the machine raised and showing
the machine loaded with staples the legs of which
are bent or inclined backward;
Fig. 6 is a view similar to Fig. 5 but showing
the driver or plunger partially lowered and driv
45 ing a staple;
Fig. '7 is a view similar to Fig. 6 but showing
the driver lowered further;
Fig. 8 is a view similar to Fig. '7 but on an en
larged scale and with parts in section;
50
Fig. 9 is a view taken substantially along the
line 9-9 of Fig. 2 and showing the plunger raised
and showing the machine loaded with staples the
legs of which are bent or inclined forward;
Fig. 10 is a view similar to Fig. 9 but showing
55 the driver partially lowered;
Fig. 11 is a top plan view of the forward por
tion of the staple guide bar;
Fig. 12 is a side elevational view of the same;
Fig. 13 is an enlarged sectional view taken sub
stantially along the line I3--l3 of Fig. l but
5
with the strip of staples omitted;
Fig. 14 is an enlarged bottom plan view of the
head portion of the machine, the view being
taken substantially along the line 14-14 of
Fig. 1;
10
Fig. 15 is a view somewhat similar to Fig. 13
but with the machine housing omitted and sug
gesting the manner in which a crooked or later
ally inclined crown .staple is taken care of by
the machine;
15
Fig. 16 is an enlarged side elevational view of
the lower portion of the head of the machine in
one form where it is not provided with clearance
slots; and
.
Fig. 17 is a similar view but showing a machine 20
provided on each side with a clearance slot.
Referring in detail to the drawings, in Fig. l
is shown a complete desk type stapler constructed
according to the present invention, although it is
to be understood that the features of the inven- 25
tion are equally applicable to a plier type stapler
and to any form of staple driving machine. The
machine shown includes a base H to the rear
portion of which is pivotally attached the rear
portion of a housing I2 as by a pivot 13. The 30
forward portion of the housing comprises a head
having a raceway 15 therein and through which
staples are to be driven one at a time by a plunger
I6 to which the driving stroke is imparted by
pressing on a hand piece I1 and the plunger is 35
returned to its raised or normal position by a
spring 14 in the usual manner. The plunger
forces the prongs of the staple through the work
on the under side of which they are clinched by
an anvil 10 on the base I I, in a well known man- 40
ner.
In a tacker the prongs are not clinched but
are merely driven through the work into the
material to which it is to be secured, as for ex
ample a tag to a box. 7
A guide bar l8 extends through the housing I2 45
from the rear end thereof, and the forward end
of such guide bar de?nes the inner or rear side
of the raceway l5 while a front plate or block
I9 de?nes the outer or forward side of such race
way. The staples 20 to be fed one at a time into 50
the raceway 15 are usually arranged in strips
connected together by a suitable adhesive, and
a strip of such staples is disposed on the guide
bar l8 in position straddling the same. They are
fed forwardly along the guide bar by means of 55
2
2,117,742
a spring 2| which draws forwardly a follower
22 U~shaped in transverse section and straddling
the guide bar. As shown, the spring 2| is con
nected with a pin 23 on a ?nger piece 24 and such
pin may either permanently or detachably con
meet the ?nger piece to the follower 22 whereby
the spring 2| acting through the follower, is con
stantly urging the staples along the guide bar
toward the raceway IS.
The structure thus far
10 described may be conventional and is here dis
closed only for the purpose of making clear the
manner in which the features of the present in
' vention are or may be incorporated in any type
of stapling machine.
7
15
The staple driving machines now generally in
use are likely to become clogged on any attempt
to use in them staples having crowns or legs in
clined or shifted out of their straight or vertical
positions respectively. With a machine con
structed according to the vpresent invention
staples having crooked crowns or legs, Within
limits, may be driven in the usual or substan
tially the usual manner. That is, the present
machine will drive staples the crowns of which
25 are crooked or laterally inclined to the axis of
the guide bar, or the legs of which are bent or
inclined forwardly or rearwardly, or which have
both crooked or inclined crowns and legs, In ma
chines prior to the present invention if the staples
30 are not absolutely straight or normal the ma
chines are likely to become clogged. With the
present machine if the staples are inclined slight
ly they may be used without difficulty and in the
usual manner without any special action or con
35 sideration on the part of the operator.
Fig. '3 shows in plan a series of or portion of
a strip of crooked or laterally inclined crown
staples and the showing in this ?gure is typical
of such staples.
The crowns of the staples are
designated 20a and in the ?gure the broken lines
25 indicate the center lines of the staple crowns
of straight staples, and it, will be‘ noted that the
crowns 20a of the illustrated staples instead of
having their centerrlines parallel with the broken
45 lines 25 actually cross such lines or are inclined
thereto.
Fig. 4 shows in elevation a series or
portion of a strip of staples the legs of which are
crooked or inclined from their normal upright
position. In this ?gure the staples have their
60 legs 20b bent or inclined’ forwardly while their
legs 200 are bent or inclined rearwardly, and the
broken lines 26 indicate what would be the center
lines of the staple legs if they were straight. The
present machine is‘capable of driving the staples
of Figs. 3 and 4 without any particular care on
the part of the operator, the device automatically
straightening the position
of ‘ the individual
staples before they are driven into the work.
In staple driving machines the raceway I5
is only of suf?cient width to receive one staple
at a time, and in such machines as heretofore
constructed a staple having a crooked or laterally
inclined crown such as illustrated in Fig. 3 could
not enter the raceway since its foremost end por
65 tion on' entering the raceway would engage the
front'plate l9, de?ning the forward side of the
raceway, and further forward movement of the
staple would be prevented. That is, the crown of
the staple'would be'left in a position diagonally
of the raceway with a portion in the raceway and
the remainder lying on top of the guide bar l8
and on the plunger I6 being depressed the staple
would be sheared or bent out of shape and would
wedge in the raceway. This would cause clogging
of the machine.
According to the present invention the guide
bar i 8 has its upper forward edge beveled back
from its forward end or face in opposite direc
tions from its center as ShOWn by the bevels 21
particularly illustrated in Figs. 11, 12, 13 and 15.
With the upper forward edge of the guide bar
beveled back in opposite directions from its
center as shown a staple having a crooked or
inclined crown 20a will move into position as
shown best in Fig. 15. That is, one end portion
of the crown of the staple will be entirely in the
raceway and the other end portion of the staple
crown will be on one of the bevels 21.
There
fore, as the plunger is depressed that portion of
the staple crown which is on one of the bevels 2'!
_will be cammed forwardly into the raceway so
that the staple crown will be shifted to its straight
transverse position and correctly positioned be
neath theplunger.
>
While the portion of the staple crown lying on
one of the bevels 21 is being cammed forwardly
as stated the other portion of the staple crown
will be hearing against the inner face of the plate
or block i9 forming the front wall of the raceway
l5, and so the staple can only move in a manner 25
to straighten its crown in the raceway. Although
Fig. 15 shows a staple the crown of which is
crooked or inclined in one direction it will be ap
parent that if the staple crown was crooked in
the opposite direction its portion which is shown 30
in the raceway would be over the lower bevel of
Fig. 15 and its portion which is shown over the
upper bevel of Fig. 15 would be in the raceway.
Therefore, it would be apparent that when the
guide bar i8 has. its upper forward edge beveled 35
back in opposite directions from its center the
machine may be used to drive staples the crowns
of which are, within limits, crooked or inclined
in either direction.
The front plate or block is substantially mid 40
way between its vertical edges and in its inner
face is provided with a vertically extending kerf
or slot 23.
This plate or block is by means of
rivets 29 clamped between side plates 30 and
such plates by means of a screw 3| are secured 45
to the housing I2, whereby the plate I9 is held
in position spaced from the forward end of the
guide bar 18 so as to therewith de?ne the raceway
i5. The side walls of the housing are provided
with recesses I lie in which the plates 30 are 50
seated. Located in the slot 28 and pivotally
mounted as by a pin or rivet 32 is a ?nger or dog
33. Such ?nger or dog (see particularly Fig. 8)
includes an elongated depending body portion 34
and an upper head-like portion 35 and the ar- ='
rangement of parts is such that the ?rst staple
on the guide bar is always being pressed against
the inner or rearward edge of the head portion
35 of the ?nger 33 as shown in Fig. 9, the pivot
32 being below the top of the guide bar i 8. When (ii)
the plunger it is operated it engages the crown
of the staple in the raceway and drives it down
wardly through the raceway, and during such
movement of the staple its crown is against the
rear or inner edge of the body portion 34 of the 65
?nger 33.
Fig. 5 shows the ?nger 33 in its normal posi
tion and in such ?gure it will be noted that the
staple which is in the raceway has its crown
bearing against the inner edge of the head portion
35 of such ?nger and that the body portion 34 0f
the ?nger is extending across the raceway l5.
The ?nger is held in this position due to the
fact that staples 20 are being forced forwardly
2,117,742‘.
3
along the guide bar by the spring Z‘I acting staples‘on the guide bar l8, as shown best in Figs.
through the‘ follower 22.
On the plunger I6 being depressed the foremost
staple is carried downwardly in the raceway as
suggested in Fig. 6 and Fig. 8, and its crown en
gages the inner edge of' the body portion 34 er
the ?nger 33 rocking such ?nger about its pivot
32 from the position of Fig. 5 to that of Fig. 8.
As the ?nger so rocks its head portion 35 is
10 shifted in a direction tending to force the staples
on the bar I8 rearwardly against the action of
the spring 2|. In this way a second staple is
prevented from entering the raceway until the
?rst staple entering it has been driven out. Ac‘
15 cording ‘to the present invention the ?nger 33
functions as above in connection with any sta
ple, and in connection with a staple having rear
wardly bent or inclined legs performs an addi
tional function now to be described.
To» adapt the machine for driving staples the
20
legs of which are bent or inclined rearwardly as
in Figs. 5 through 8 the lower cross portion or
wall 36 of the block I9 and the forward portion
of the side ribs lBa on opposite sides of guide bar
25 18 are cut away as at 3‘! providing clearance
rearwardly of the side portions of the lower end
of the raceway and at opposite sides of the lower
forward end of the guide bar I8. With this con
struction as the plunger l6 descends it engages
30 the crown of the ?rst staple of the strip and
depresses such staple from the position of Fig.
5 to that of Fig. 6 or into the dotted line position
20d of Fig. 8. As the plunger continues to de
scend the crown of the staple being driven en
35 gages the inner edge of the body portion 34 of
the ?nger 33, and as the staple moves'down
wardly in the raceway the frictional engagement
of its crown with the ?nger 34 tends to rock
the staple in a direction to carry its legs toward
40 the front plate I9 as suggested by the dotted line
position 20]‘ in Fig. 8. As the downward move
ment of the staple continues it is rocked into- the
straight full line position 209 of Fig. 8 from which
position it is driven in the usual manner. It will
45 be noted that owing to the clearance space 31
located rearwardly of the lower end of the sides
of the raceway the prongs of the staple may pass
through the machine even. though the staple is
not rocked sufliciently to bring it into the posi
tion 20g of Fig. 8. From the foregoing it will be
50
apparent that the machine may be used to drive
staples either or both of the legs of which are bent
rearwardly and that staples which are thus not
straight will not cause clogging of the machine.
‘This construction provides a transverse shoul
55
der I811v (Figs. 12, l4, l6 and 17) on the under side
of guide bar l8 to the rear of which the lower
transverse wall 36 of block l9 extends and with
which it cooperates to hold the block l9 in posi
tion and prevent its being forced forward under
pressure created during the staple driving opera‘
tion.
To adapt the machine for driving staples either
or both legs of which are inclined forwardly the
front plate IS in its inner face at each of its
65
vertical edges is provided with a vertically ex
tending groove or recess 38.
These grooves or
recesses 38 are spaced apart a distance equal to
the distance between the legs of one of the staples
70 2|] so that they are in alignment therewith, and
the bottom or inner wall 39 of each groove is
curved outwardly or inclined to the inner face
of the plate I9. The bottom walls 39 of the
grooves meet the inner face of the plate H3 at a
75 point below the lower ends of the legs of the
9 and 10, and the grooves being spaced as above
described the lower ends of forwardly inclined
staple legs on the ?rst staple 20c enter such
grooves as clearly illustrated in Fig. 9.
If the plate 20 were not provided with the
grooves 38 then a staple having forwardly bent
legs ordinarily could not move off the guide bar
l8 sufficiently to have its crown portion enter the
raceway l5. However, in the disclosed construc
tion the forwardly bent or inclined staple legs
enter the. grooves 38 and the crown portion of
the staple advances into the raceway. There
fore, with the construction described the ma
chine may be used to drive staples the legs of
which are inclined forwardly. This is true since
when the forward staple of a strip advances to
the position of the foremost staple in Fig. 9 its
crown is under the plunger l6‘and on the plunger
being depressed the curved or inclined bottom 20
walls of the grooves direct or guide the staple
legs outwardly into the raceway as pressure is
applied to the staple by the plunger. Thus, the
staple is moved to its proper position or aligned
in the raceway as shown at 211e, Fig. 10 and may
be driven therethrough in the usual manner.
From the foregoing description taken in con—
nection with the drawings it will be apparent
that when a machine is construct-ed according to
the present invention it may be used to drive 30
straight staples or staples the crowns of which
are crooked or the legs of which are bent or in
clined forwardly or backwardly, and that the
machine may be used to’ drive staples having in
clined crowns and inclined legs, and that the ‘
machine may drive a staple even though one of
its legs is inclined forwardly and the other back~
wardly. Of course, if a staple is inclined beyond
certain limits it cannot be used in the machine
although it is noted that usually if a strip of 40
staples is bent the staples are only slightly out
of normal and in such cases they may be used in
the present machine without special care on the
part of the operator.
In Fig. 17 the side plates 30 which carry the
front plate l9 are provided with clearance open~
ings or slots 40 arranged laterally or opening
laterally of the lower portions of the vertical guide
grooves 38. These openings provide an exit for
broken staples and facilitate clearing of the race
way should staples become jammed therein.
Having thus set forth the nature of my inven
tion, what I claim is:
1. In a staple driving machine, a housing hav
ing a raceway therein, a plunger for driving
staples through said raceway, a guide bar for
guiding staples to said raceway and having its
forward end forming a side of said raceway, and
said guide bar having its upper forward edge
beveled with the width ‘of the bevel increasing
from the center portion of the bar toward its
longitudinal edges whereby staples coming to
the raceway with their crowns laterally inclined
are straightened as they‘ are carried into the
raceway by the plunger.
2. In a staple driving machine, a housing,
spaced means de?ning opposite sides of a race
way in said housing, said housing having a pas
sage along which staples move to enter said race~
way, and oneiof said means having a portion
beveled back from its face at the height of the
crown of a staple entering the raceway with the
width of‘ the bevel‘ increasing laterally from the
center portion whereby staples coming to the
raceway with their crowns laterally inclined are 75
4
2,117,742
straightened as they are carried forward by the
plunger.
3. In a staple driving machine, a housing, a
staple guide bar in said housing, a front plate
CR spaced from the forward end of the guide bar
and therewith de?ning opposite sides of a race
way to which staples are guided by said guide
bar, a plunger operable to drive staples through
said raceway, said front plate having guide
10 grooves in its inner face spaced apart as are the
legs of a staple to receive the forwardly inclined
legs of a staple and permit a staple having a
forwardly inclined leg to enter the raceway, said
grooves having their bottom walls inclined out
to the face of the plate whereby to guide staple
legs to driving positions, and said housing having
clearance openings through its opposite side walls
communicating with said raceway and said
grooves laterally of the curved walls of said
grooves of a size to carry broken staples from the
raceway.
4. In a staple driving machine, a housing hav
ing a raceway therein, a guide bar for guiding
staples to said raceway, a spring pressed fol
lower urging staples along the guide bar to the
raceway, a plunger operable to drive staples
through the raceway, means pressed into the
raceway by staples on the guide bar to frictionally
engage the crown of a staple being driven through
30 the raceway whereby there is a tendency of a
staple being driven to rock in a direction to carry
its legs toward the forward side of the raceway,
and the walls being cut back at each side por
tion of the lower end of said raceway to provide
35
clearance for rearwardly inclined legs of staples
whereby staples having rearwardly inclined legs
may be straightened in the raceway as they are
advanced by the plunger.
40
5. In a staple driving machine, a housing, a
staple guide bar in said housing, a front plate
spaced from the forward end of the guide bar
and therewith de?ning opposite sides of a race
way to which staples are fed along the guide bar,
a plunger operable to drive staples through said
45 raceway, said front plate having guide grooves
in its inner face and having the bottom walls of
said grooves inclined out to the inner face of the
plate, and said guide bar having its upper for
ward edge beveled with the width of the bevel
increasing from the center portion of the bar
toward its longitudinal edges whereby staples
coming to the raceway with forwardly inclined
legs or laterally inclined crowns are straightened
as they are advanced by the plunger.
6. In a staple driving machine, a housing, a
member forming‘ a staple guide bar in said hous
ing, a member forming a front plate spaced from
the forward end of the guide bar and therewith
de?ning opposite sides of a raceway to which
60 staples are fed along the guide bar, a plunger
operable to drive staples through said raceway,
said front plate having guide grooves in its inner
face and having the bottom walls of said grooves
inclined out to the inner face of the plate, and
65 one of said members having a portion beveled
back from its face at the height of the crown of
a staple entering the raceway with the width of
the bevel increasing from the center portion
laterally whereby staples coming to the raceway
70 with forwardly inclined legs or laterally inclined
crowns are straightened in the raceway as they
are advanced by the plunger,
‘7. In a staple driving machine, a housing hav
ing a raceway therein, a plunger for driving
staples through said raceway, a guide bar for
guiding staples to said raceway and having its
forward end forming a side of said raceway, said
guide bar having its upper forward edge beveled
with the width of the bevel increasing from the
center portion of the bar toward each of its longi
tudinal edges whereby staples coming to the
raceway with laterally inclined crowns are
straightened as they are carried into the raceway
by the plunger, and spacing means at the lower
part of the sides of the guide bar to provide
clearance between the sides of the bar and the
housing, said spacing means terminating short
of the lower end of the raceway to permit passage
of staples with rearwardly inclined legs.
8. In a staple driving machine, a housing,
spaced means de?ning opposite sides of a race
way in said housing, said housing having a pas
sage along which staples move to enter said race~
way, one of said means having a portion beveled
back from its face in opposite directions from its
center at the height of the crown of a staple
entering the raceway whereby staples coming to
the raceway with laterally inclined crowns are 25
straightened as they are carried into the race
way by the plunger, and- there being clearance
spaces at the sides of the lower end of the race
way and extending backwardly from the raceway
to permit passage of staples with rearwardly in
clined legs.
9. In a staple driving machine, a, housing, a
staple guide bar in said housing, a front plate
spaced from the forward end of the guide bar and
therewith de?ning opposite sides of a raceway 35
to which staples are guided by said guide bar, a
plunger operable to drive staples through said
raceway, said front plate having guide grooves
in its inner face spaced apart as are the legs
of a staple and having their bottom walls in 40
clined out to the inner face of the plate where
by staples with forwardly inclined legs are
straightened in the raceway as they are advanced
by the plunger, and there being clearance spaces
at the sides of the guide bar at the lower end of 45
the raceway and extending backwardly therefrom
to permit passage of staples with rearwardly in
clined legs.
10. In a staple driving machine, a housing, a
staple guide bar extending into said housing, a
front plate spaced from the forward end of the
guide bar and therewith de?ning opposite sides
of a raceway to which staples are fed along the
guide bar, a plunger operable to drive staples
through said raceway, said front plate having
guide grooves in its inner face and having the 55
bottom walls of said grooves inclined out to the
inner face of the plate to guide forwardly in
clined legs of a staple into the raceway as it is
advanced by the plunger, said guide bar having 60
its upper forward edge beveled back from its
center portion toward its longitudinal edges
whereby staples coming to the raceway with
laterally inclined crowns are straightened as they
are carried into the raceway by the plunger, and
spacing means at the sides of the guide bar below
the staples to provide clearance between the sides
of the bar and the housing, said spacing means
being spaced backwardly from the lower end of
the raceway to permit passage of staples with
rearwardlyv inclined legs.
FRIDOLIN POLZER. '
70
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