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Jan. 24, 1950
Filed 06t- 26, 1945
2 Sheets-Sheet l
Jan. 24, 1950
2 Sheets-Sheet 2
Filed 0G11. 26, 1945
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m -umS_a
Patented Jan. 24„L 1950
John W. Meaker, New York, N. Y.
» Application October l,26, 1945, Serial No. 624,809
5 Claims. (o1. 21a-_29)
of which is shown on bar 20 at 25; Similar lugs
or ears on bars 2|, 22 and 23 are shown at 26, 21
This invention relates -to mechanism for ‘the
electro-perforation of sheet material. It is _an
object of the invention to produce a device of
and 28, respectively.
at 30, 3|, 32 and 33 to supporting members 35,
36, 31 and 38 attached to the framework of the
machine. This kind of support permits the bars
ing sheet material over an extensive area.
The principles of the invention will be deñned
in the claims ultimatelyv appended hereto. It will
be illustrated by the following description taken
in conjunction with the drawings, in which
to be rotated about the screws or bolts 30, 3|, 32
and 33 for adjustment if that becomes neces-_
Fig. 1 is an end view of rows of electrodes.
Fig. 2 is a side view of the device partly in sec
Fig. 3 is a detailed View of an electrode support
shown partly in section.
These lugs are designed
to be attached by a suitable screw or bolt shown
thisdcharacter which' will perforate rapidly mov
On the opposite side of each bar are electrode
supporting lugs. Some of these are showny at
40, 4I, 42 and 43 in Fig. 2. These lugs may be
integral with the bars 20, 2 I, 22 and 23 or attached
thereto' by suitable screws shown at 45 and 46
on bar 22. The screws for holding all the other
lugs on the Various bars 20, 2l, 22 and 23 are
the same and will not be given additional refer-g
Fig. 4 is a plan view of part of a lower electrode
bar with the electrodes shown thereon.
Looking at the drawings l designates a piece
of sheet material such as paper or the like and
ence characters.
2a, 2b, 3a, and 3b show feed rolls designed to move
the sheet material through the machine. At 5 20 ` In Fig. 1 the lugs on bar 20 have'been desig
nated 4|), 40a, 40h and 40o. Each lug supports
is a support or platform preferably made of glass
two pivoted electrodes such as those shown at
or some insulating wear resistantv plastic. ‘ In
50a, 5Ia, 52a and 53a. Electrodes on bar 20 are
the supporting platform 5 are slots 6, 1, 8 and 3,
through the platform and disposed at right angles
to the path of travel of the sheet material.
In =
designated at 50a, 50h, 50c, 50d, 50e, 5I!)¢ and 50g,
as shown in Fig. 1'.
Each electrode is made of
these slots are arranged the lower electrode sup
porting bars I0, II, I2 and I3. These bars -are
arranged so that the tops thereof are in the slots
6', lI, 8 and 3 respectively. The tops of these bars
suitable conducting material, preferably metal,
which will readily conduct electricity and at the
designed to support thereon a number of spring
clip type electrodes such as those shown at I5,
I6, I'I and IB of Fig. 2. Fig. 1 shows anyone
that they will stay down to contact with the sheet
material'even when the latter is travelling at
same time resist wear as the sheet material passes
under the end thereof.
Electrodes must have
are curved as shown in Fig.` 2 and‘each bar is 30 sufficient weight'or be equipped with a spring so
relatively high speed.
" ;
Through each of the lugs such as those shown
of the rows of electrodes but we will call it the
at 40, 4I, 42 and 43 are supporting pins. Each
first row at the right end as viewed in Fig. 2 so
lug has the same kind of a pin and only one will
that the lower bar is bar I0 and the upper bar 20.
described. Looking at Fig. 3, the pin is shown
The various spring clip electrodes on bar I0 are
at 50, it passes through the lug 42 parallel to
designated I5a, |517, I5c, I5d and 15e (see Fig. 1).
the longitudinal axis of the bar 22. The pin 50
Fig.` 4 illustrates the supporting bar I0 and the
electrodes Iâa, I5b, I5c and I5d. These spring 40 projects on both sides beyond the lug 42 and onthe projecting ends thereof the movable elec-V
clip electrodes are made out of spring wire bent
trodes are hung. In order to attach the elec-~
into the shape shown in the figures so that they
trodes, circular grooves, such as those shown
will embrace the top and sides of the various vsup
at 5I and 5I', are cut near the ends of the pin=
porting bars I0, II, I2 and I3. There is sufficient
"' Ell.
friction between the bars and the spring elec
The electrodes are secured on the pin 50 by
trodes so that the latter' will not' move accidentally
means of screws such as those shown in Flg.- 3
yet can be positioned merely by' sliding them
at 55 and 56. These screws are threaded into
along the bar. It is obvious that they are readily
tapped holes in the electrodes and have projecting
removed and replaced when this becomes neces
The upper swingable electrodes are mounted on
50 ends or dogs which engage in the grooves 5I and
5I ’, so that the electrodes 52a and 52h are free to
supporting bars 20, 2l, 22 ‘and 23. These bars
are made of insulating material such as “My
calex,” “Ebonite” or other plastic. Each bar
Each pair of upper and lower supporting bars
pivot around the pin 5I)v but may not move axially»
is equipped with two `or more lugs or ears, one 55 such as bars Ill and 20 are `positioned relative’to
each other so that the lower ends of the upper
electrodes on the upper bar are arranged when
in lowermost position just above the center of
the top edge of the lower bar. For instance, look
ing at Fig. 2 we see that the lowermost portion of
the electrode 50a is positioned just above the top
edge of the bar l0. Supporting bars l l and 2| and
ñcient spring tension and friction to maintain
its position thereon, said upper electrodes cori
sisting of pivoted arms mounted in pairs, the
arms of each pair being electrically connected and
each arm designed to cooperate with one arm
of a pair of different spring clip electrodes on
the lower bar to perform the perforating oper
l2 and 22 and I3 and 23 are arranged in the
ation on the sheet material passing between the
same relative position to each other.~
The spring clip electrodes disposed on- the 10
2.V In a device of the character described, rows
lower supporting bars are arranged so that one
of upper and lower electrodes, rigid supporting
arm thereof is underneath one of the upper elec
bars. for said electrodes, said lower electrodes
trodes while the other arm of the sameïclip-isk
comprising bentl wire shaped in the form of a
under the adjacent upper electrode of another
double U and designed to engage the edge of the
pair. This is clearly shown in Fig. 1_ For ex
support on which it is positioned by means of
ample, looking at spring clip |5b»we see that
spring tension suiiicient to prevent accidental
arm 60 is underneath upperelectrode 59h where-4
as arm 6| is underneath upper electrode 50c. The
displacement yet` designed to permit the elec
trode to be slid along the supporting means to
upper edges of the spring clip electrodes where
any'desired position, and swingable upper elec
the wire is bent over the upper edge of the sup 20 trodes adapted to cooperate with said lower elec
porting bars therefor are arranged so that they
trodes to perforate sheet material passing there
are on substantially the same level as the upper
surface of the platform 5 so that the bottom of
3. In a device of the character described a
the sheet material passing along the platform 5
will just make contactv with the wire clip lower
electrodes. The weight of the upper electrodes
pressing downwardly on the sheet material-'will
press the sheet material between upper and lower
supporting.> platformA . over whichV sheet material
may be,- passed, slots arranged insaidplatform
at right angles to-,thedirectìon of travelof said
sheet/material, insulating'rigid supporting bars
disposed beneath said slots; each bar equipped
electrodes as it moves along over the platform 5.
with a` pluralityofspring„clip- electrodes each of
Each spring clip lower electrode bridges over 30 which has a pair of armsdisposedover the up
the space between a pair of adjacent upper elec
perr edges of> said bar, supportingk bars over said
trodes. The adjacent electrodes are not how
platform and pivoted electrodes thereon de
ever'mounted on the same pin. Current~forpersigned to cooperate with the spring lclip electrodes
forating the sheet material may be supplied to
to transmit electric current; from the upper
either the upper or lower electrodes and at 63 and
tothelower electrodes for the purpose of per
Sli` are shown connections for applying currentto
the lower electrodes. Each row of electrodes‘is
supplied with current as shown in Fig. 1. The
forating sheetmaterial- passing along the plat
4. In a device4 for electrically perforating di
current coming in through wire 64‘, for instance,
electric sheet n'iaterialhavingv two rows of co'
passes up throughthe spring clip I5a through 40 operatingfelectrodes facingeach other and ar
the sheet material i to electrode 50a,.it would
then pa-ss through the support pin for this-elec
trode such as pin 50 and down through the ad
rangedtorecei've between them the materiaLto
be perforated, the combination including a sup.
port oi’ insulating material, a series of spring
clips-bent into the form of> a double U withtwo
pairs of. oppositely disposed arms, one'pair of
whichare connectedetogetheriat their free ends;
said uci-shaped. arms slidably grippingsaid sup
port on opposite sidesthereof: with sufficient fric.
jacent electrode 50h to spring clip' electrode l5b.
In this way the current would pass up and down
through the sheet material and along the rowsv of
electrodes; Each time that it passed from an up-V
per4v to a lower electrode and through the sheet
material it would perforate the latter.
The various rows of electrodes asrshownl in
Fig. 2 may be staggered in relation to eachother
tion' and >tension-to.maintainzsaid clip in position
on said 'support'and veach of-said spring clips inf
cluding-two> electrode portions- disposed. at one
edgekof the support in opposed relation to coop
erating :electrodes iny the other. row of -electrodes,
so that the net result of a series-of rows'is'to
perforate an area of the sheet material as` it
passes through the machine.
At 10, 1l, 'l2 and 'I3 of Fig. 2 are'shown’pinsfor limiting- the downward movement of the
the electrode portions ofeachofsaid clips being
connected electrically> through ,other portions of
their - respective'V clips.
electrodes 50a, Bla, 52a, and 53a. Each ofthe
5, In a: device for: electrically «perforating‘sheet
upper'electrodes is equipped with such a pin so
material.havingtwo- rows of cooperating electhat its downward motion can be so limited;
trodes~ facing eachotherand arranged to receive
The present invention is not limited to any par' 00 between them the material. to> be perforated,
ticular electric circuit or electric means for sup
the combination including' a rigid supporting bar
plying the necessary sparks to perforate the
of Ainsulating material and a. series of double
sheet material but an apparatus such as that
springß-clips eachformingtwin electrodes; carried
described in Meaker Patent #2,372,508 may- be
used to supply the current to the electrodes de
scribed in» this application.
In theA light of the foregoing description-the
following is` claimed.
1. In a device of the character described anA
upper and lower row of electrodes, supporting
means- therefor, said lower electrodes` compris'
ing a series of wire‘clipsdisposed over the edge;
of the support therefor, each clip having twov arms
hentgover the upper edge of the support andv each
clip designed to embrace the - support with suf-
byfsaidrsupporting bar, each electrode. facing an
electrode in- the othergrowof electrodes'and comprisingl a'. U -shapedY portion- frictionally embracingV
thefsides4 of the supporting bar and with the
bight'of the U engaging the' edge of the sup-
porting bar,- the two' U-shaped portions being»
mechanically and electrically connected by an
integralportion joining one leg ofA one> U-shaped
portionito, onealeg: offithe other AUffshaped portion;
(References on following page)
of followhìg
this patent:
réifë?êilces are of record in the
»_ ¿
" '
-/ Number
2 297 499
Han ___________ __ nec. 14, 1886
Dorenwend ______ __ Sept. 15,
Smith ____________ __ Feb. 6,
Ross ____________ __ Mar. 28,
Oliver ___________ _ May 16,
Baumbach _______ __ Sept. 29,
Meaker ___ _______ __ Mar. 27, 1945
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