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Dec.- 31, 1946.
'
v. J. DEL GIUDICE.
2,413,548
l
METHOD OF MANUFACTURING METAL CLIPS OR LINKS
Filed Feb. 14, 1942
3 Sheets-Sheet l
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ORNEYS.
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Dec. 31, 1946.
_1_ DEL GIUDlCE
2,413,548
qMETHOD OF MANUFACTURING METAL CLIPS OR LINKS
Filed Feb. 14,l '1942
5 sheets-sheet 2
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INVENTOR
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Dec.'31, 1946.l y
v. J. DEL GIUDICE
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2,413,548
METHOD OF MANUFACTURING METAL CLIPS OR LINKS
n Filed Feb..1'4, 1942l
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INVENTOR
y l/¿Z’zzar fßelá'l'zzdz'ce.
1
BY
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A
ORNEYS
2,413,548
Patented Dec. 31, 1946
UNITED STATES PATENT OFFICE
2,413,548
METHOD OF MANUFACTURING METAL
CLIPS OR LINKS
Victor J. Del Giudice, Detroit, Mich., -assignor to
» L. A. Young'Spring & Wire Corporation, De->
troit, Mich., a corporation of Michigan
Application February 14, 1942, Serial No. 430,848
6 Claims. (Cl. 59-35)
l
The present invention relates generally to the
manufacture of _metal clips or links such, for ex
ample, as clips or links which are used for in
terconnecting in series a plurality of shells or
cartridges to provide a so-called cartridge belt or
strip for use with a machine gun. As will be un
derstood, the clips or links and the shells or car
2
clips or the remainder of the blank or work
piece.
Another object of the present invention is to
tridges together form the belt and the cartridges
provide an improved method or process of the
foregoing character which includes a succes
sion or series of steps for forming from a single,
continuous blank or ribbon-like strip of metal, a
plurality of finished clips or links, in which the
themselves function as hinge pins or the like to -
method or process includes novel shearing oper
join the clips or links together in the forma
tion of the articulated belt. The invention also
contemplates, however, the production of a plu
rality of other articles of like or similar nature.
Heretofore, in the manufacture of suchbelt clips
ations which permit the later preiorming oper
ation on a portion of each of the clips in the
blank While said clips remain a part of the blank
or work' strip.
A further object ofthe present invention is to
or links, from a strip or ribbon-like length of 15 provide an improved method or process for man
ufacturing metal clips or links by virtue. of .which
metal, a considerable portion of the metal of the
the lead or forward portion of one clip or link
blank strip became scrap and thus waste mate
and the following or rear portion of the next ad
rial during the method or process of forming the
vanced link are so formed in the blank or strip
clips or links. It is,> therefore, one of the im
of material as to interñt one within the other
portant objects and advantages of my invention
and thus eliminate, to a large extent, the pro
to provide an improved Vmethod or process and
duction of scrap and thus waste metal between
the means or mechanism for carrying it out, in
which a plurality or succession of clips or links
are formed from a length'of stock, such as a
ribbon-like piece of steel, by a continuous or 1
progressive process or method, and in which a
minimum of waste material or scrap occurs.
A further object of the present invention is to
provide an improved method or process for man
ufacturing metal clips or links for the forego
ing or other purposes by virtue of which a plu
rality or series of clip-forming operations are
performed simultaneously on >the blank or rib
adjacent clips.
The _above and other objects and advantages
of the foregoing invention will appear from the
-following description and appended claims when
considered in connection with the accompanying
drawingsV forming a part of this specification
wherein like reference characters designate cor
responding parts in the several views.
In said drawings:
Fig. 1 is a plan view of a portion of a strip or
blank of metal illustrating the results of the
various steps or operations Vof the improved meth
bon-like piece of stock during the progressive
movement or advance of the stock from station . i rod> `or process embodying the present invention.
Fig. 2 is a plan view of a metal clip or link
to station while carrying out the various steps
produced by the method of the present inven
of the method or process. »
tion.
_
Another object of the present invention is to
Fig'. 3 lis a -plan view, partly in section, and
provide an improved method or process of the
foregoing character by virtue of which the suc 4.0 partly broken away, illustrating a portion of my
improved vmethod or process and portions of the
cessive clips or links may be individually sub
jected to a preforming step or operation while
.apparatus for carrying it out, for producing clips
remaining an integral part of the blank or Work y
or links in accordance with the present method.
Fig. 4 is a continuation of Fig. 3; the right
hand end of Fig. 3 and the left-hand end of Fig. 4
should be joined to show a continuous method or
process. Separation of the method or process
and the mechanism or apparatus for carrying it
out was done'` so as to reduce the length of the
strip without changing or otherwise affecting the
position or location of the blank during the pre
forming operation.
A further object of the present invention is to
provide an improved method or process-of the
foregoing character in which the clips or Ílinks
causes a slight movement of ,a portion of the
ñgure which could not have been placed in de
sirable scale on the drawings in a single ligure
clip undergoing said preforrning operation rela
tive to the adjacent clips and the remainder of
the strip or work blank without, however, caus
Fig. 5 is an enlarged longitudinal section taken
substantially along the line 5-5 of Fig. '3, looking
ing any movement whatsoever Qf said adjacent
in _the direction of the arrows.
are subjected to a preforming operation which
only.
2,413,548
4
3
Fig. 6 is an enlarged transverse sectional view
out as to make possible the preforming opera
taken substantially along the line 6-6 of Fig. 3,
tion of a later step in the method or process and
locking in the direction of the arrows.
to permit the aforesaid movement of the clip or
link member during the preforming operation
relative to the remainder of the blank or strip
Fig. 7 is a transverse sectional View, on an en
larged scale, taken substantially along the line
'l-î of Fig. 3, looking in the direction of the
of material -from which the clips or links are be
arrows.
ing formed.
_
Referring now to the drawings, in Fig. 1 there
is shown, somewhat schematically, a strip or
li) length of metal stock from which is formed, by
looking in the direction of the arrows.
a succession or series of preferably die operations
Fig. 9 is a transverse sectional view, on an en
or steps, metal cartridge or shell clips, one such
larged scale, taken substantially along the line
clip being shown at the right of Fig. l and in Fig.
9-9 0f Fig. 3, looking in the direction -of the
2, after the ñnal operation or step of the present
arrows.
method or processhas been completed.ß
Fig. 10v is an enlarged longitudinal sectional
iew taken substantially along the line Ill-I0 of
In Figs. 3 and 4 there is shown, somewhat more
Fig. 4, looking in the direction of the arrows.
in detail, the blank or strip of material, indi
cated as a whole at I5, and the operations or
Fig. 11 is a transverse sectional view, on an
steps performed upon said material at the various
enlarged scale, taken substantially along the line
ll-ll of Fig. 4, looking in the direction of the 20 stages or stations of the method or process, t0
gether with portions of die forming mechanism
arrows.
or apparatus for performing the various steps or
Fig. l2 is an edge view of a completed clip or
operations of said process or method.
link which was made in accordance with the pro
' In general, the present method or process, as
cess of the present invention, with the excep
tion or" a iinal operation or series of operations
disclosed herein, comprises a first step or opera
tion performed at station A (Fig. 3) which in
for giving the clip its final form or shape as
volves a shearing operation by a shearing die
shown; and
(see Figs. 3 and 5) to form a portion of the out
Fig. 13 is a plan View of the completed clip or
link -of Fig. 12.
line of a single clip from the stock or strip I5,
said clip being indicated as having a tongue por
Before explaining in detail the present inven
tion or lead end I6 and a pair of slits or cuts I8
tion it is to be understood that the invention is
defining a portion of the outline of the body oi
not limited in its application to the details of
the iinished clip, see Fig. 1. During the shearing
construction and arrangement of parts illustrated
operation at station A, a simultaneous punching
in the accompanying drawings, since the inven
operation is performed to- produce a substantially
tion is capable of other embodiments and of being
rectangular hole or opening Il which is located
practiced or carried out in various ways. Also
in the blank in spaced relation to and in advance
.it is to be understood that the phraseolcgy or
of the lead end or tongue portion i6 of the par
terminology employed herein is for the purpose
tially formed clip (see Figs 3 and 5).
of description and not of limitation, and it is not
The stock or strip l5 moves from station A to
intended to limit the invention claimed herein
> beyond the scope of the appended claims.
station B` at which station a pilot 2t (Fig. 5) car
ried by an upper die member enters the hole or
Previous attempts have been made to produce
opening il' just described so as to locate or posi
cartridge clips or links by progressive methods or
tion the blank i5 properly for the performance
processes from a single strip or blank of metal
but in all such cases considerable waste material 45 of the second step or operation of the method.
or scrap has resulted from the carrying out of
The second step, as shown, constitutes a second
Fig. 8 is an enlarged transverse sectional View
taken substantially along the line 8-8 of Fig. 3,
such methods or processes.
So far as is known,
„nearing operation performed by a shearing
punch carried by an upper portion of the die
mechanism or apparatus, See particularly Fig. 5.
ess by which it has been possible to produce a
plurality or series of clips or link members for 50 This punch shears the metal between the hole Il'
and also in the region of the tongue and outline
use in connection with shells or cartridges, from
i8 and thus provides'a second or further cut as
a single strip or blank of material, which method
as indicated by the cut-lines It in Figs. 1, 3 and 5.
included a preforming step whereby a portion of
It is to be noted at the left end of the strip I5
each of the successive clips or links was pre
formed while remaining an integral part of the 55 in Fig. l that the width of the tongue or lead
portion lâ of the clip is given as approximately
strip or blank, without in any way alîecting the
.55 inch which indicates the width or location of
position, location or condition of the remainder
the shear or parallel cuts which occur at station
of the strip or blank. Therefore, it is an im
portant purpose of the novel method or process
A. The second shearing‘cperation performed at
vof forming clips or linksin accordance with the 60 station B eliectsl a second cut so that the blank
is slit in the region 'of the lead end or tongue
present invention, to form progressively a plural
ity or series of clips or links vhaving inter?ltting
l5 ata width of approximately .59 inch, thus leav
ing a space or clearance of approximately .020
portions, in which the method or process includes
inch as shown at 22a between the tongue or lead
the novel step of preforming a portion of a clip
at a predetermined stage of the method, during 65 end i6 of said clip and the partially formed leg
portions 23 of the adjacent clip to the right.
which preforrning operation a portion of said clip
is caused to move longitudinally relative to the
From station B, the blank or strip of material
next adjacent clip with which it interfits and also
i5 moves to station C at which station a trim
ming operation is performed to remove or punch
relative to the entire blank or strip of material,
which latter remains in its normal position and 70 out the metal at opposite sides of the body por
condition during the preforming operation.
tion iSd of thc partially formed clip,_ along the
Moreover, it is a further important feature of
lines or cuts indicated at £8 and I9, to provide
the present invention to provide an improved
the pair of openings 2l, as seen in Figs. 1 and 4.
method or process which includes shearing opera
At station C a second operation is performed
tions or steps which are so arranged and carried 75 simultaneously with the trimming operation, this
no one has heretofore evolved a method or proc
:2,413,548 '
5
nlatter operation being performed byeJ round
lp'loyed _for carrying out the present method or
Y punch :which removes the-"metal'web :or piece v2.o
process, that being shownin the drawings vbeing
(see Figs. l and 3) ¿to provide thezspaceor open
ing .22 4between the legs ’Z3 -of :the'next 'adjacent
merely illustrative of a suitable type of apparatus,
means or mechanism for‘this purpose. It will be
clip :to the yright.
.understood further that if and when desirable,
the die mechanism may be rearranged so that
Thefstrip or workpiece lli ‘is further Yadvanced
the strip or blank of material it may be fed lon
.fromstation C toward the right to station Dat
gitudinally through the apparatus or mechanism
which point `the p-reiorming operation on .the
on edge. In such a case, the apparatus would
body portion lea or” the clipfoccurs. During this
prefo-rmingcperation which will be described in A10 be arranged in a horizontal plane with the male
and female portions or parts or the dies, etc.,
detail hereinafter, the vtongue or lead end i6 oi
having relative movements toward and away from
the vclip will be drawn or 'moved to the .left of
one another in a similar plane. Moreover,_ii de
Figs. l
4 and relative to the legs `2.3 vv.of -_the
sirable, the positions of the male and female parts
next adiacent clip vt0 the :right in „these figures
yto ‘provide ñared portions 2d in the body portion ,15 of the apparatus asshown in the accompanying
drawings, could be reversed.
.lßb of the clip. This movement of .the Vtongue
.or _lead portion i6 vand the body portion of the
Station A
`clip relative tothe legs 23 of the next adjacent
clip to the right, is permitted or made possible
Referring now particularly to the apparatus or
by’v-irtue of the oombinationof the first and sec 20 mechanism located at station A and shown in
ond _shearing operations at stations A and B, re
Figs. 3, 5 and 6 of the drawings, 3G represents
spectively, since these shearing operations have
`provided or produced the clearance‘ZZa as .indi
cated at the right end of Fig. 1 and also in Fig. 4.
It will be understood that the clip or pair of , ,
adjacent clips'which are describedab-ove as being
formed, have remained an integral partiof the
blank or stock i5 throughout all of the operations
performedat stations A, B, C and D.
as a whole the upper die head or member which,
as shown, carries a male die member or shearing
punch 34 which is adapted to move downwardly
and into position as shown in Fig. 5 in coopera
tion with the lower or female die member 3l of
the apparatus. lt will be understood that as the
K shearing punch or member 3e moves downward,
it shears the metal cf the blank l5 to provide the
From station D. the strip moves `toward vthe 30 outline for the tongue portion it and the body
right to station E. At stationrE‘ a separating or
portion its, of the íirst clip as `defined or shown
severing operation or step takes place during
by the cuts or lines indicated at IB in Fig. 1.
which the ñrst two adjacent clips at the right
The portions Iii, Ita will be moved downward to
hand end of the blank are separated and their
the ruil line position and in Contact with the
vadjacent corners rounded,> as shown at ¿i9 in
upper surface or face of a spring~pressed pad
4. Thus the clip 5i to the right of the lblank of
which is normally urged upward by virtue of
Fig. 4 is now no longer'a part of said, blank and
Springseil. After the upper die member 3@ and
has been formed into the shape and configuration
the shearing punch 35, have moved upward out
as indicated herein and in Fig. 2. rI‘his finished
of contact with the female die member Si, the
`clip as completed by the present method com
pad
returns the portions id, ita. of the blank
prises a lead portion or tongue H‘B, a body por
to their broken line position substantially flush
tion ¿5b with ñares 2d located at opposite lat
with the blank or strip i5, as shown in Fig. 5.
eral sides of the body portion and a bifurcated
A stripper is provided for assisting in the work
portion Comprising the legs 23a, whose inner ends
of the shearing die member 35i, said stripper be
are out away at their inner opposed longitudinal 45 ing indicated as a whole at 32 in Figs. 3, 5 and 6.
edges to provide the opening indicated at Ila.
‘Operating simultaneously with the shearing
kIt will be understood that while I have de
member ‘3A and carried by the die head 30 at
scribed above the series or operations performed
station A, is a punch member 25| carried by head
at the-different stations. namely stations A to ,E
`3€) which punch serves to .pierce the blank of
inclusive, upon a pair of adjacent clips, it will 50 metal E5 and to remove therefrom a piece of
be understood that after the blank or work strip
scrap metal
see particularly Fig. 5. The
i5
been vfed through all of the l_operations at
`punch 25 moves downward'with respect to the
the severa] stations describedabove, the bringing
female die membery 3l and thus forces the pierced
or moving together of the male and female die
metal piece 25a into va suitable channel or open
members and associated parts will perform, simul
ing formed in the lower die member. rI'he punch
taneously. the entire series or group of operations
25 forms the hole or opening il as clearly seen
on the blank or strip of material. In'other words,
in Fig. l of the drawings. It is to be noted that
the shearing, piercing or punching, trimming and
this hole .il is located
advance (tothe right)
preforming operations, as described above, as well
of the lead end or tongue 5E of the partially
the separating operation at station E. are all 60 formed clip. This hole il provides a portion of
performed simultaneously and since'the blank or
work strip l5 is fed progressively through the
apparatus from. station to station, a substantially
continuous series of operations are performed
upon the workpiece'so as to produce, with each
advance movement of the workpiece, a completed
clip or link member such as that sho-wn as a
whole at 5l in Figs. 2 and 4.
'
'Referring now particularly to Figs. 5 to 11 in»
elusive> of the drawings, suitable ,apparatus l.is
shown .for the purpose of vcarrying-out the vari
ous operations or steps of the process which Voc
cur o_r-take place at stations A, B, C, D and E,
_described above. Ait willbe understood that .any
¿suitable die :apparatus or lmechanismmay be 1em
the adjacent clip located tothe right of the tongue
i6. IThe shearing operation, performed by the
member se, shears the metal or“ the blank l5 to
provide the tongue or lead portion iii which,
as shown, has ya width of approximately .55 inch.
The punching or piercing operation performed
by the punch member 2li not only forms the be
ginning of the next adjacent clip or `link Vmember
to the right Vof the tongue iiàbut also determines
or prelooates the position of the second clip mem
ber >to be formed in the blank.
By referenceto Fig. dof the drau ings, it will
be seen .that the upper die member or head 3Q
>is `reciprocablfy‘ .guided above and with relation
vto .thelower >diemember orïbase 31 „by means of
2,413,548
7
8.
a plurality of vertical 'columns or posts 33, only
42 which is provided for the purpose of remov
ing metal on the opposite sides of the body por
one such being shown.
Station B
From station A, reference being had particu
larly to Figs. 3, 5 and 6, the blank or stock I5
moves toward the right of Fig. 3 to the second
stage or station of the process, designated sta
tion B. At station B (Figs. 3 and 7) the blank
is subjected to a second shearing operation by
tion Iâa of the partially formed clip to provide
slots or openings on opposite sides thereof, as seen
at 2| in Figs. l and 4. As the shearing punch 42
moves down toward the base or female die mem
ber 3|, metal slugs 2Ia are removed from the
blank, see particularly Fig. 8. These slugs are
pushed downwardly into suitably located open
ings or channels formed in the die member 3I.
Referring now particularly to Figs. 3 and 9,
means of a shearing die member 3S which sub
it is to be understood that a punching operation
jects the previously sheared portion of the blank
occurs simultaneously with the trimming opera
to a further shearing operation as indicated by
the lines i9 in Figs. l and 5. During this shear
tion performed by .the trim punch 42. The upper
ing operation, the width of the shear adjacent 15 die member Sil carries a preferably round punch
the tongue portion I5 of the partially formed
member 21 which, when said upper die member
clip is increased to approximately .59 inch, thus
moves down toward the lower die member, car
producing a clearance or space between opposite
ries the punch 2l into contact with the previously
side edges of the tongue It and the adjacent
sheared portion 20 of the blank to remove said
portions of the blank of a width of approximately 20 portion, see particularly Fig. 9, and to leave a
.920 inch. It will be noted, see particularly Fig~ 5,
space or opening 22 in the blank, see Figs. 1, 3
that the shearing die member 33 has associated
and 4, which is deñned on opposite sides thereof
with it a downwardly extending or projecting
by the bifurcated portion of the neXt adjacent
pilot 26. This pilot is adapted to enter the pre
clip to the right which includes, as shown, the leg
viously formed hole or opening Il in the blank 25 portions 23, After the combined trimming and
or workpiece I 5 and thus position or properly
punching operation has been performed at sta
locate the blank with respect to the second shear
tion C, and the upper die member with attached
ing die mechanism.
trim punch 42 and slug-removing punch 21 have
The upper die member or shearing device 38
been retracted or moved upwardly out of con
moves downwardly and shears the blank to ex 30 tact with the blank I5, said blank is moved for
tend the shear along the lines I9 from the slot or
wardly or to the right until it reaches station D.
opening Il rearwardly past the tongue portion I6
and in parallelism to the shear or cuts I8 shown
in Fig. l, this second or increased shear being
Station D
3l, said pad being normally urged upward by
or workpiece I5. At station D, the apparatus or
Referring now particularly to the operation
indicated .by the lines designated I9. As the 35 performed at station D and with particular ref
shearing member 38 moves downward, it shears
erence to Figs. 4 and l0 of the drawings, it will
the metal blank I ä and moves it into contact with
be seen that the nearly completed clip or link
a spring-pressed pad 35i located in the lower die
member is still an integral part of the metal strip
springs 4Q. When the head 3l) carrying the 40 mechanism includes an upper die member 44
shearing member 38 and pilot 26 are retracted in
carried by the head 36. The underside of the die
an upward direction, the spring-pressed pad 39
member 44 is provided with a pocket or recess for
returns or moves the sheared portions of the blank
I5 to the broken line position as shown in the
right portion of Fig. 5. Thus, the portions 20 and .
provided with a pocket or recess which conforms
IS of the blank I5 will be returned to substantial
to the shape of the preforming die member 45 and
ly their original position in the blank so as to
permit the entire blank to be moved further to
ward the right until it reaches the next station.
With respect to the shearing operation per- „
formed at station B, attention is particularly di
rected to Fig. '7 of the drawings wherein an en
larged transverse section through the second
shearing means or apparatus is shown It will be
clearly seen from an examination of Fig. 7 that ,
the first shear line is indicated at i8 and the
second line of shear at I9. Thus the distance be
tween the two lines of shear, namely the ñrst
shear I8` and the second shear I9, represents the
receiving and supporting a preforming die mem
ber 45. The lower or female die member 3I is
is provided with a bore in which a reciprocable
spring-pressed plunger 46 is located, the spring
not being shown. When the preforming die 45
moves down into contact with the clip or link
member, the longitudinal edge portions of the
body Ißb of the clip are pressed downwardly and
flared as shown at 24. When the upper die holder
and preforming die move away from Ithe lower
die member and the preformed clip or link, the
spring-pressed plunger 46 functions to `lift the
clip member out of the pocket or recess formed
in the female or lower die member 3I so that the
clip, which is still attached to the workpiece or
amount of clearance or space which, as stated 60 strip I5, can be moved with the strip toward the
above, is approximately .020 inch.
Station C
Referring now particularly to station C as best
seen in Figs. 3, 8 and 9, there is performed, at
this station, a so-called trim operation which is
combined with a punching operation to remove
right in Fig. 4 to the next operation which is
performed at station E.
Station E
Referring now to the operation performed at
station E and with particular reference to Figs.
4 and l1 of the drawings, it will be seen that the up
per portion or head til of the die mechanism car
ries a so-called separator die 48. The separator die
scribed. '
'
70 4S is adapted to move downwardly into the space
Referring particularly «to Fig. 8, there is shown
formed in the lower or female die memberSI and
`por-tions of the blank which have been previously
subjected to the shearing operations just de
an upper die member 30 and a lower or female die
during this downward movement, the combined
separator and cutting die member 48 removes the
shown as a whole at 32. The trim operation at
web-like strips IEc, I 5c, which are disposed op
station C is performed preferably by a trim punch 75 posite the flared portions 24, 24 of the yclip and
mem-ber 3I, together with an interposed stripper,
¿tiene
t
simultaneously trims and rounds the cornersy of
the‘le'g portions 23a ofthe clip 5I at the right
10
sheared portion thereof, advancing said blank
andïlocating' the saine while simultaneously per
formingasecond shearing operation on the blank
hand end of Fig'. 4 and the corners of the next
adjacent clip 52. These rounded corners `or radii
in the region of the first-named sheared and
are shown at 49 in Fig. 4. By‘removing the con
pierced portions thereof, trimming said blank in
necting strips or portions |50, |50, the combined
the‘loea'tion ofthe sheared'por'tïions'thereof while
Separator and cutting die member 48 thus severs'
simultaneously removing a portion of scrap from
or separates the two adjacent-clips, whereupon
points- -locate'd entirely within the longitudinal
the clip shown as a whole at 5I is entirely sepa
edgesl of said blank,V preforming said anticle to
rated from the next adjacent clip 52 in the line, 10 provide a flare in portions thereof while permit
it being’uïìde'rstoòd that the clip 52 remains" an
ting movement of a portion of said article rela
integral part of the workpiece or strip l5 until
tive'to said-blank without aifecting the position
said clip has-reached the position vacated by the
or location of the blank, and thereafter cutting
clip 5I as shown in Fig. 4.
said blank on a line: transversely of the longi
As seen in Fig. 4, »the stripper 32 terminates
tudinal edges thereofv to separate said preformed
somewhat in advance of the’r-nechanism located
article from the remainder of said blank.
at station D, since no stripper is needed for the
Y2. Themethod of forming a plurality of metal
operations performed at stations’D and E. If,
clips'cf like size and formation from a single
however, it proves desirable to continue the
blank of metal by a substantially continuous
stripper‘to include the mechanism located at sta
series of dieopei‘ations, which comprises the steps
tions D and E, this can be easily done.
of preliminar-ily forming a portion of one of said
. The successive clips, such as the clip 5i’. are
clips extending acrossv the entire width of said
removed after the operation performed at sta
blank byshearing said blank and simultaneously
tion E and are shaped or completed by any suit
forming a portion of another clip by a piercing
able means or apparatus (not shown) and in any 25 operation, advancing said blank and performing
suitable manner to provide the finished clips such
a second shearing operation on the blank to fur
as the clips 6B shown in Figs. 12 and 13.
ther the completion of said second-named clip,
From the foregoing it will be seen that I havek
performing a trimming operation on said blank
provided a novel method or process and suitable
to remove portions of the metal from points lo
means or mechanism for carrying it out in which 30 cated solely Within the longitudinal edges of said
a plurality of metal clips or links of the charac
blank and adjacent said partially formed clips
ter described are formed from a single blank or
strip of metal and in which all of the clips remain
a part of the blank until the two adjoining clips
at the lead end of said blank reach the last op
eration of the process or method which is per
formed by the mechanism located at station E.
It is to be noted particularly that there is but
a minimum of waste of material as the result
of slugs or scrap removed from the blank during
the method or process of forming the clips.
Moreover, it will be seen that the tonque mem
bers or lead ends of the clips interñt with the bi
furcated following portions or leg members of the
next advanced clip in the strip or workpiece. In
this manner, considerable material is saved since,
it is to be noted particularly, the only material
removed as scrap between adjacent clips is that
which is punched out to form the slot or opening
Il, Ila, the blank piece 20 between the opening
and simultaneously removing said scrap metal,
subjecting one of said clips to a preforming op
era/,tion to provide flared portions therein and
simultaneously moving a portion of said pre
formed clip relative to the next adjacent clip
without aiîecting the position or location of the
metal blank, and thereafter subjecting adjacent
clips »to a punching operation to separate the
preformed clip from said blank on a line extend
ing transversely across the entire width of said
«blank and to simultaneously provide rounded
edges at predetermined points on said adjacent
clips.
3. The method of progressively forming metal
lic .links for cartridge belts which comprises pro
gressively feeding a metal strip» having a prede
termined width coextensive with the length of
the body portion of the finished link, through
I ‘l and the adjacent lead end or tongue of the 50 a series of separate but coordinated die opera
tions to simultaneously perform shearing, pierc
next clip to the left, the material which is re
ing, trimming and preforming operations on said
moved from opposite sides of the body portion
strip to progressively form said links, while uti
16a, IGb of the clip, `to provide the openings 2l
lizing the entire width of said strip said per
on opposite sides of the body portion, and finally
the narrow Webs, strips or connecting pieces I5c 55 forming operation causing a movement of a por
tion of one of the links being formed relative to
which join the adjacent clips at their outer longi
the strip of which it forms a part without sepa
tudinal edge portions. Thus, the total scrap re
rating such links from the longitudinal edges of
moved from the blank is relatively small. Fur
the strip or aiiîedting the position or condition
thermore, attention is again invited to the fact
that by virtue of applicant’s manner of using 60 of the remainder of said strip, and thereafter
transversely cutting said strip to sever each of
shearing dies or members, it is possible for the
said preformed links therefrom.
lead ends or tongues of the successive clips to be
4. The method of progressively forming car
moved longitudinally relative to the body of the
tridge abelt links between the longitudinal edges
blank and the next adjacent clip without in any
way affecting the positions of the blank itself or 65 of a strip of metal having a predetermined width
coextensive with the length of the body portion
the other clips being formed therefrom.
`
of the completed link, which comprises the steps
I claim:
of simultaneously shearing and piercing said
1. That improvement in the art of producing
strip at predetermined spaced points to remove
a plurality of metal articles of like character ex
ltending across the entire width of a single metal 70 a slug of metal from said strip in advance of
said shear, again shearing ,the strip to intercon
blank by a substantially continuous method,
nect the pierced portion thereof and said first
which method comprises the steps of shearing
sheared portion simultaneously trimming and
said blank to provide a portion of one of said
punching the strip at the locality of the sheared
articles and simultaneously piercing said blank
at a point removed from and in advance of the 75 portions thereof to remove portions of the metal
2,413,548
l1
within the longitudinal edges of said strip, and
12
- Without effecting the movement of the remain
thereafter moving a portion of one of said car
der of the strip, and thereafter cutting said strip
tridge links longitudinally of the strip while
simultaneously preforming said portion while re
maining an integral pant of said strip Without
transversely of its edges to separate said pre
formed link from the strip.
6. The method of progressively forming car
tridge belt links from a strip of metal having
a predetermined Width coextensive with the
eiîecting the movement of the remainder of the `
strip.
length of the body portion of the completed link,
5. The method of progressively forming car
which comprises the steps of simultaneously
tridge belt links from a strip of metal having a
predetermined width coextensive with the length 10 shearing and piercing said strip at predetermined
spaced points to partially form a pair of adjacent
links in said strip, again shearing said strip to
form additional portions of said adjacent links,
removing metal from Within the longitudinal
points to remove a slug of metal from said strip
in advance of said shear, again shearing the strip 15 edges of said strip to further the formation of
the said links, preforming a portion of one of
to interconnect the pierced portion thereof and
the links While simultaneously moving said por
the portion of said strip at the ñrst shear, simul
tion relative to the adjacent link While both of
taneously trimming and punching the strip at
of the body portion of the completed link, which
comprises the steps of simultaneously shearing
and piercing said strip at predetermined spaced
said links remain an integral part of said strip
the locality of the sheared portions thereof to re
move portions of the metal Within the longitudi 20 Without causing movement of the remainder of
the strip, and then cutting across both longitudi
nal edges of said strip, moving a portion of one
nal edges of said blank to separate the preformed
of said cartridge links longitudinally of the strip
link from said strip.
while simultaneously preforming said portion
VICTOR J. DEL GIUDICE.
While remaining an integral part of said strip
v
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