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Патент USA US3077143

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Feb. 12, 1963
H. w. HENN
3,077,135
CLOSE CENTER SLOT PERFORATING DEVICE
Filed Feb. 29, 1960
2 Sheets-Sheet 1
INVENTOR.
HARRY WALTHER HENN
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ATTORNEY
Feb. 12, 1963
H. w. HENN
3,077,135
CLOSE CENTER SLOT PERFORATING DEVICE
Filed Feb. 29. 1960
2 sheetsésheet 2
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INVENTOR.
HARRY WAL THEIR HENN
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33777135
EL?fiE CENTER SLGT PERFGRATWG DEVECE
Another inherent necessity is that conventional gang
punches must be completely broken down from assembled
Walther Henri, 9925 Duly Road, Cincinnati, Ghio
Filed Feb. 29, 1960, Ser. No. 11,739
3 Claims. (Cl. 83-687)
This application is a continuation in part of my co
pending application Serial No. 852,066 ?led November
10, 1959, for Metal Stamping and now abandoned.
My invention relates to devices for perforating mate
rials requiring that the perforations be in close proximity
each to the other.
it is an object of my invention to provide a perforating
device whereby multiple perforations in close relation to
condition in order to remove, add or replace a punch
element. Replacement or removal of punch elements
require that the entire assembled punch unit must be re
moved from a press before any change or alteration can
be made to the present conventional assembly gang
punches.
With my invention punches can be placed side by side
and permit perforations to be made with a minimum of
material between each perforation. Consequently close
perforations can be made in one step operation and it
is not necessary to disassemble the punch unit assembly
to add, delete or replace a punch element while my punch
each other may be produced by a single perforating oper 15 unit assembly is on a punch press.
ation.
Referring to FIGURES 1 and 2 there is a left end plate
Another object of my invention is to provide a close
1 slidably mounted in relation to a backup plate 2 during
perforating device that will permit close in line of multiple
assembly and in ?xed relation t iereto when the perforators
perforations to be accomplished in one operation.
re in operational condition. A right end plate 4- is fixed
A further object of my invention is to provide a per 20 from movement in relation to the backup plate by re~
forating punch assembly unit whereby the closeness of
movably positioning it in a slot 4a in the backup plate.
the perforations will not be limited by the size of per
While I prefer the right end plate to be ?xed in the backup
forating elements when placed adjacent each to the other.
plate it is apparent either of the end plates could be
It is a primary object of my invention to provide a
mounted in this manner but not both at the same time to
punch unit assembly that is readily expanded or contract~ 25 accomplish my objects. The left end plate acts as a
ed to increase or decrease the number of perforating ele
movable clamp jaw and holds spacers 5 and perforators
ments which may be rapidly and readily removed or
6 in secured position each to the other in spaced relation
added to the assembled unit and also to rapidly replace
ship when draw bolts 3} and 3a are screwed into tapped
perforators with or without the removal of supporting
holes 7 and 7a in the left end plate which is drawn towards
spacers without disassembling the entire punch assembly 30 the ?xed right end plate 4 by the draw bolts 3 and 3a.
unit from a punch press or die set.
The perforators 6 have a main rectangular body portion
‘These and other objects and advantages will become
apparent from the speci?cation and claims.
8 with an extending arm 9 to form a bearing surface 310
that rests on a surface 11 of the spacer. A piercing or
The nature and novel features will be more readily
cutting surface 12 is provided at the body bottomv end 13.
understood from the description taken in conjunction with 35 While I have illustrated a rectangular piercing end it’
tl e, accompanying drawings forming part hereof in
becomes apparent that any shape such as arrows, dots,
which:
arcs and or circles can be developed within the cutting or
FIGURE 1 is a perspective view of my perforating
piercing area provided. These perforators are machined
punch unit assembly in fragmentary section.
FIGURE 2 is a side view in elevation of my punch
unit assembly showing a right end plate secured in the
keyway in the backup plate.
FIGURE 3 is a perspective view of right end plate.
FIGURE 4 is a perspective view of a single perfora
tor.
FIGURE 5 is a perspective view of a spacer and per
forator support.
FIGURE 6 is a perspective view of a backup plate
showing right end plate keyway and dovetail key.
to micromatic tolerances in thickness so that when they
are placed on the spacers the surface 14 of the perfora~
tors will be flush with the surfaces 15 of the spacers. The
body portion of the perforator is made and limited to the
width and length of a slot or any desired hole to be
punched. Because of this the spacing of the perforations
can be in?nitesimally close together. There is no need
for an enlarged shank to carry the load of punching be
cause of the combination of the perforator and spacers
when secured together coact and are of suf?cient strength
to withstand the load of punching. Holes 13 in the perfo
FIGURE 7 is an end elevation showing the perforator,
spacer and backup plate assembled together as a unit.
FIGURE 8 is a top plan view of the punch holder.
rators are provided for slidably retaining them on draw
FIGURE 9 is a sectional elevation taken on line 9-9
perforators separately from the spacers and the punch
unit assembly. The spacers 5 have holes 16 independant
of the holes in the perforators for slidably retaining the
of
‘
FIGURE 10 through a pressure pad punch holder and
fragment of a press unit assembly looking at the face of
the pressure pad.
FIGURE 11 is a sectional elevation of my perforation
punch unit assembly and die assembled on a fragmentary
bolts 3a during assembly only. These holes are independ
ent of holes in the spacers and permit the removal of
spacers on the draw bolts 3 which together with the draw
bolts 3a hold the spacers and perforators in laminated
fixed relations each to the other. The independance of the
draw bolts 3 and 3a permit the spacers to be secured to
60 gether by the draw bolts 3 while spacers are removed when
section of a punch holder and conventional die set.
FIGURE 12 is a sectional elevation of my punch unit
draw bolts 3a are withdrawn. An offset 17 is provided on
assembly attached to a fragment part of a holder and
the spacers and the perforators ?t in these offsets and are
ram of a press.
secured to the spacers when the right and left end plates
The description and drawings are merely illustrative
are held in clamping relationship by the draw bolts 3
and various modi?cations and changes may be made With
and 3a. A dovetail like keyway 19’ is provided for en
out departing from the principle of my invention.
gagement with a half dovetail key 2t) integral with the
Like indicia refer to like parts throughout the several
backup plate 2. The keyway is made larger than the key
views.
to enable rapid removal of the punch unit assembly as a
The spacing of perforating elements in present con
unit or insertion of any one or all of the spacers and per
ventional gang piercing punch and dies are limited be 70 forators from the punch unit assembly by sliding the
cause of the size of shanks necessary to sustain the load
spacer away from the key. This eliminates the necessity of
of punching.
disassembling the entire punch unit assembly whenever
3,077,135
3
4i
it is desired to insert or remove additional perforators.
all the perforators can be sharpened in assembled condi
tion.
Having thus described my invention what I claim is:
l. A multiple perforator for stamping a series of spaced
holes comprising, a punch holder, said holder having a
backup plate adapted to be mounted in a punch press, key
means disposed along the lower surface of the backup
plate, a series of relatively ?at punches mounted in said
punch holder, the upper end of each punch being seated
The tapered surfaces of the dovetail slot and key are held
in operational relationship by a pressure pad 22 that is
secured to a punch holder 23 when the backup plate 2 is
secured to the punch holder 23. The surface 24 of the
pressure pad bears securely against the perforators and
spacers and inhibit them from movement while perform
ing perforations.
The backup plate 2 has bolt holes 25 for securing it to
the punch holder 23. Dowel holes 26 for dowel pins 27 10 against the lower surface of the backup plate, respective
are provided to position the punch assembly on the punch
spacers interposed between said punches, each punch
holder 23. The slot 4:: is provided for securing the right
having a portion overhanging the associated spacer and
hand end plate from sliding in relation to the backup
supporting the punch against downward motion, said
plate.
spacer adapting the punch to be withdrawn laterally from
The pressure pad has bolt holes 31 for bolts 32 for
the punch holder, draw bolt means adapted to clamp the
securing it to punch holder 23 adjacent to and in ?rm con
spacers and punches in assembled relationship, the upper
tact with the perforators and spacers. A backup screw
portion of said spacers adapted to inter?t said key means
33 is provided adjacent to dowel pin 27 and acts as a
g‘ack for easy removal of the pressure pad from the punch
holder.
The right end plate has counterbored holes 34 for the
draw bolts 3 and 3a and is the means for clamping all the
peritorators and spacers in ?xed position for punching and
piercing. An enlarged half dovetail keyway 35 corre
and to lock the spacers to the backup plate in response to
lateral pressure of the spacers against the key means, and
pressure pad means detachably secured to the backup plate
and adapted to force the spacers laterally into clamping
engagement with said key means, thereby locking assembly
of clamped punches and spacers to the backup plate, said
pressure pad means adapted to be removed from the back
sponds to the dovetail keyway on the spacers. One 25 up plate, adapting the assembly of clamped punches and
side 36 of the dovetail is beveled while the other side is
spacers to be shifted laterally to a disengaged position
perpendicular. The keyway is larger than the half dove
relative to the key means for removal of the assembly
tail key on the backup plate and allows the end plates,
from the holder as a unit, said draw‘ bolt means adapting
with the spacers and perforators clamped together, to
individual punches to be removed from the punch holder
slide sidewise to the key when it is desired to remove the
by removing the draw bolt means from the punch holder,
punch unit assembly from the backup plate. This ar
whereby the individual punches are shiftable laterally to
rangement permits the removal of the right and left end
a disengaged position relative to the spacers.
plates, spacers and perforators as a unit after removing
2. A multiple perforator for stamping a series of spaced
the pressure pad from the punch holder.
The additional
holes comprising, a punch holder, said holder having a
width of the keyway permits movement to the left in re 35 backup plate adapted to be mounted in a punch press, a
lation to FIGURE 1 until the bevel edges of the key and
key projecting downwardly along the lower surface of the
keyway can pass each other and allow the components
to be dropped away from the backup plate which can re=
main secured to the punch holder.
backup plate and having along one side a surface tapered
outwardly at less than a right angle to the lower surface
of the backup plate and forming a dovetail side on the
key, a series of relatively ?at punches mounted in said
In practice the overall spread of any number of perfora
tions are held to a prescribed plus or minus tolerance.
For example in a spread of perforations using 20 perfor
ators the tolerance is held to a plus or minus two
punch holder, the upper end of each punch being seated
against the lower surface of the backup plate, respective
spacers interposed between said punches, each punch
thousandths of an inch. This is accomplished by making
having a portion overhanging the associated spacer and
every alternate spacer and perforator a pair. The per 45 supporting the punch against downward motion, said
forators and spacers are held to a mean dimension with
spacer adapting the punch to be withdrawn laterally from
alternate spacers and perforators to a tolerance from a
the punch holder, draw bolt means adapted to clamp the
mean to plus tolerance dimension and from a mean minus
spacers and punches in assembled relationship, the upper
tolerance dimension and each pair is marked over and
portion of said spacers being slotted to inter?t said key
under. The combination of plus and minus units thus 50 and to lock the spacers to the backup plate in response
overcome any possibility of cumulative over and under
to' lateral pressure of the spacers against the said dovetail
spreading of the perforations.
side of the key, each of said slots having a width greater
To assemble my punch the backup plate is secured to
than the width of said key, adapting the spacer to be
the punch holder. My right end plate is then positioned
disengaged with respect to the said key upon shifting
in the slot in the backup plate and secured from sliding in 55 of the spacers laterally from the tapered dovetail side of
relation to the backup plate. Spacers and perforators in
the key, pressure pad means detachably secured to the
selected pairs and numbers are slid onto the dovetail key
backup plate and adapted to force the spacers laterally
side by side in laminated relationship between the right
into clamping engagement with said dovetail side of the
and left end plates. Draw bolts 3 and 3a are screwed into
key, thereby locking assembly of clamped punches and
the left end plate which moves together with the spacers 60 spacers to the backup plate, said pressure pad means
and perforators until they are clamped together with the
adapted to be removed from the backup plate, adapting the
right end plate. if desired the spacers, perforators and
assembly of clamped punches and spacers to be shifted
end plates can be removed from the backup plate as a
laterally to a disengaged position relative to the dovetail
unit. After the perforators, spacers and end plates are
side of the key for removal from the holder as a unit,
clamped together they are positioned securely against the 65 said draw bolt means adapting individual punches to be
dovetail key by the pressure pad which is mounted and
secured on the punch holder.
To replace a perforator the draw bolts 3:: are removed
up to and past a particular perforator to be replaced. The
removed from the punch holder by removing the draw
bolt means from the punch holder, whereby the individual
punches are shiftable laterally to a disengaged position
relative to the spacers.
perforator is removed and replaced without disturbing 70 3. A multiple perforator for stamping a series of spaced
the spacers. After replacing the perforators the draw bolts
holes comprising, a punch holder, said holder having a
are tightened and the punch unit assembly is in operational
backup plate adapted to be mounted in a punch press,
condition. If it is desired to sharpen the perforators the
key means disposed along the lower surface of the backup
pressure pad is removed and the spacers, perforators and
plate, a series of relatively ?at punches mounted in said
end plates in clamped relation are removed as a unit and 75 punch holder, the upper end of each punch being seated
3,077,135
6
5
against the lower surface of the backup plate, respective
spacers interposed between said punches, each punch
having a portion overhanging the associated spacer and
supporting the punch against downward motion, said
spacer adapting the punch to be withdrawn laterally from
the punch holder, a ?rst draw bolt passing through the
said spacers and adapted to clamp the spacers and punches
in assembled relationship, a second draw bolt passing
through the punches and adapted to hold the punches in
alignment with one another, the upper portion of said 10
spacers adapted to inter?t said key means and to lock the
spacers to the backup plate in response to lateral pres
sure of the spacers against the key means, pressure pad
means detachably secured to the backup plate and adapted
to force the spacers laterally into clamping engagement
the key means for removal of the assembly from the
holder as a unit, said second draw bolt adapting individual
punches to be removed from the punch holder by re
moving the second draw bolt from the punch holder,
whereby the individual punches are shiftable laterally to
a disengaged position relative to the spacers.
References Cited in the ?le of this patent
UNITED STATES PATENTS
178,147
345,190
Hickok et a1 ___________ __ May 30, 1876
Stimpson et a1. ________ __ July 6, 1886
834,887
Calhoun ____________ __ Nov. 6, 1906
864,552
1,302,249
Perkins et al __________ __ Aug. 27, 1907
Vogetzer ____________ __ Apr. 29, 1919
1,569,136
2,364,339
2,594,932
Pardee ______________ __ Jan. 12, 1926
Becker ______________ M Dec. 5, 1944
Judelson ____________ __ Apr. 29, 1952
with said key means, thereby locking assembly of clamped
punches and spacers to the backup plate, said pressure pad
means adapted to be removed from the backup plate,
adapting the assembly of clamped punches and spacers
2,638,984
Errig et a1. __________ __ May 19‘, 1953
to be shifted laterally to a disengaged position relative to 20
2,825,407
Widell ______________ __ Mar. 4, 1958
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