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Патент USA US3021742

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Feb. 20, 1962
M, o, scHuR
3,021,732
PIN STUDDED PUNCH ROLL INCLUDING METHOD OF FABRICATION
Filed Dec. 18, 1959
3 Sheets-Sheet 1
INVENT
MILTON O. SCH
“mm-04a
.
Feb- 20, 1962
M. o. SCHUR
3,021,732
PIN STUDDED PUNCH ROLL INCLUDING METHOD OF FABRICATION
Filed Dec. 18, 1959
'
3 Sheets-Sheet 2
‘
FIG - 5
INVENTOR.
MILTON o. SCHUR
Feb. 20, 1962
M. o. SCHUR
3,021,732
PIN STUDDED PUNCH ROLL INCLUDING METHOD OF FABRICATION
Filed Dec. 18, 1959
3 Sheets-Sheet 3
FIG
7
FIG-8
INVENTOR.
MILTON O. SCHUR
BY
"ce
‘3,021,732
Patented Feb. 20, 1962
2
3,021,732
3, somewhat enlarged, showing the washer served or
wound toroidally by a wire strand or metal ?lament;
FIG. 6 shows an assembly of blank washers and wire
7
PIN STUDDED PUNCH ROLL INCLUDING
'
METHOD OF FABRICATION
_
Milton 0. Schur, Asheville, N.C., assignor to Olin Matine
-son Chemical Corporation, a corporation of Virginia:
‘
wound washers combined into aunit to de?ne a laminated
roll;
Filed Dec. 18, 1959, Ser. No. 860,513
I
.
FIG. 7 shows a portion of the exterior surface of the
punch roll, somewhat enlarged for clarity, as it appears
4 Claims. (Cl. 76-101)
after grinding; and,
The present invention relates to web perforating and,
8 is an elevational view, somewhat enlarged, of
in particular, relates to a web perforating roll including 10 a FIG.
portion of the pin studded web perforating roll of
a method of fabricating the roll.
FIG. 1, broken away for clarity, showing the composite
. A particular feature of the invention is the provision
structure of the roll and the disposition and conforma
of a novel [punch oripin studded web perforating roll.
tion of the pin-like punches which project beyond the
The term “punch” as utilized here is intended to refer
cylindrical surface of the roll.
to small pins or a rod-like structure having diameters 15
Referring now in detail to the drawings, there is shown
as small as 2 to 3 thousandths of an inch.
in FIG. 1 a typical arrangement in which the web per
A further feature of the invention is the provision
vorati'ng roll, fabricated in accordance with the present
invention, may be utilized. The arrangement shown
A further feature of the invention is the provision of a
comprises a supply roll of web or sheet material S con
web roll;.of the above class which is easily kept in prime 20 tinuously
advancing in the direction of the arrow to a
condition operative to cutuor pierce clean perforations
take-up or rewind rollT. ‘The web’ material advances
in a continuously advancing sheet or web with a mini~
between an idler roll U and a‘sand paper or abrasive roll
mum of expense and labor;
.
, _ ‘
of anovel method'of fabricating aweb perforating roll.
V. The web is guided further by the ?anged pin G-—G.
. A further feature of the invention resides in the fact
that the novel process disclosed presents a very con
venient and simple methodfor sharpening a plurality of
Head roll H is provided in conventional fashion to insure
25 a tight uniform package at the rewind end.
.p . '
Mounted over the supply roll S and free to pivot or
move in the fashion of a universal joint is a pin studded
punches simultaneously and in situ where the, punches
are studded about a roll in circumferential array.
. A process embracing certain features of the present
punch roll indicated generally by the reference-numeral,
invention may comprise a plurality of apertured discs 30
by means of appropriate bearings upon an axle or shaft
or washers, winding a portion of the washers in toroidal
10.
As is more apparent in FIG. 2, the roll is supported
11 received in a generally C-shaped yoke 12 in turn piv
fashion with a wire strand or metal ?lament while a por
otally mounted in a bifurcated rod 13 received within a
tion of the washers remain blank or free of a winding,
support arm 14 in telescopic fashion. Note that the
dipping the wound washers in a resin or wax solution
rod 13 is restrained by suitable means .from moving
effective to coat or mask the wire and the washers with 35 relative to the arm 14 in an axial direction but is free
the solution, assembling a plurality of blank and Wound
to rotate relative thereto about a longitudinal axis com
washers upon a mandrel to form a generally cylindrical
mon to both elements‘. The arm 14 is pivotally mount
roll so that the roll is formed compositely of blank
ed to‘a ?xed bearing as at 16.
washers and wound washers, removing a portion of the
As a result of‘this manner of mounting the pin studded
40
exterior surface of the roll effective to reduce the outer
perforating roll 10, ‘the roll is free’to' “follow” the sup
diameter thereof and effective to cut the wire strands
ply roll S quite closely in that the roll can readily move
and etching the discs so as to remove a circumferential
upwardly and downwardly as shown by the arrows 17
margin thereof whereby a plurality of segments of Wire
of FIG. 1 and laterally to and fro in the direction shown
project radially from the roll and in circumferential array
45 by, the arrows of FIG. 2. The roll 10 is also free to
about-the exterior surface of the roll.
rotate relative to the arm I4v as previously described.
. An apparatus embracing certain features of the present
Referring now to the scheme for fabricating the dis
invention may comprise a generally cylindrical laminated - closed embodiment of the
pin studded roll, one must
roll, said roll being fabricated compositely of a plurality
provide, basically, a plurality of metallic washers 18
of discs or washers each having a bore and bound to
(FIG. 4) and a quantity of metallic strands or Wire 20
gether in side¢by-side relationship vby suitable clamp 50 (FIG. 5) Where the wire and the washers are fabricated
means received in the bores, a plurality of radially pro
of metals which are disposed in diverse‘ positions in the
jecting pins disposed between the discs arranged in cir
cumferential array and projecting beyond the cylindrical
electromotive series so that an electrolytic bath or etch
surface of the roll, said pins being coated with a resinous
or waxy material in the region thereof received between 55
the’. washers and said washers and said pins, respectively,
being fabricated of metallic materials having diverse posi
tions in the electromotive series.
_ ing process will etch or erode one metal or the other,
selectively.
.
'
At, this point, it is appropriate to state that although
the present invention may be practiced with any size wire
or any size washer, it is noteworthy that the invention
is singularly useful where there is a requirement for a
Other features and advantages of the present invention
roll studded with a plurality of exceedingly small punches
will become more apparent from the succeeding speci?ca 60 or pins having a diameter of the order of 2 to 3 thou
tion .when read in conjunction with the appended draw
sandths of an inch and projecting radially a distance of
ings, in which:
the order of 5 to 6 thousandths of an inch.
FIG. 1 is a disclosure of an apparatus embracing the
Obviously, in such a roll, the wire utilized would
principles of the present invention;
’
FIG. 2 is a plan view' of a portion of the apparatus
of FIG. 1;
'
1 FIG. 3 is an elevational view of a serrated or notched
washer;
_
.
65 correspondingly have a diameter of the order of 2 to 3
thousandths of an. inch. In the disclosed embodiment,
the washers are fabricated of aluminum and the Wire
of steel and an etching bath comprising a 10% solution
of sodium hydroxide maintained at 40° C. is utilized
. FIG. 4 is an elevational view of a plain or blank 70 because it is desired to remove or etch the aluminum.
washer;
> FIG. 5 is a view of a portion ofthe washer of FIG.
Consequently,v a plurality of washers 18 fabricated ‘of
aluminum and having a central aperture 19, hereinafter
referred to as blank washers, are provided.
3,021,732
3
.
.
4:
,
an appropriate etching bath as shown at 35 in FIG. 6
for the purpose of selectively etching the roll. As stated
Approximately 1/2‘ of a‘ given group of washers are
machined by an appropriate method, such as grinding
or milling to develop a plurality of generally V-shaped
notches 21 upon the exterior of the washer and uni
formly spaced in circumferential array as shown in‘ FIG.
previously, the bath of the present embodiment is made
3. A corresponding number of‘notches 22 are machined
upon the‘ interior of the surface of the same washers
arranged so that’ a given ‘pair of notches 21'——22 fall
occurs effective to erode or remove by electrolysis a
upon or are common to a given radius R.
up of a 10% solution of sodium hydroxide held at about
40° C.
Upon rotating the roll- in} the bath,_ electrolytic action
de?nite‘ annular margin of each aluminum. disc 18 or
23, as the case may be, with the resultthat avde?nite
For pur
segment of wire projects (in. the. present. embodiment
the wire projects aboutv ‘$50-00 Ofi an inch) beyond the
surface of the roll thus de?ning a plurality of radially
disposed‘, uniformly spaced array of‘ pins or punches.
identi?ed'by the‘ reference numeral 31 in FIG. 8':
poses‘ of clarity in describing the invention, the plain or
blank washer may be identi?ed hereinafter by the refer
ence numeral 18 while the notched washers will be
identi?ed by the reference numeral 23.
After notching, the washers 23" are' then‘ served or
Next an appropriate brush or similar tool is‘ utilized:
wound’ with wire 20 in toroidal fashion so that the wire 15
tio’wipe or sweep the webs ofv resinous material identi
encircles the hat of the washer and engages the grooves
tied in FIG. 8 by the reference’ numeral 32'v from be
21 and 22 in sequence as shown in FIG. 5‘. Obviously
tween the'various pins or punches 31' to generate a clean
the wire may be applied with any desired lead or helix
pin studded roll as shown at 33' on the“ right hand‘ side
angle, however, it is preferred that the radial position
'_
of the wire in" the" region of the‘ sides or faces 24‘ of 20 of FIG. 8.
As stated previously, it is notintendedi'that“ the’ process
the washers correspond as much as‘ possible to the‘di‘s
be limited to the particular imetals disclosedz so long as
position of a radius line R. In the'prcsent disclosure‘
the metals may be selectively etched. ;
the wire is of steel and has a diameter ofv about 371000
Among the advantages residing in‘ the punch2 r'olli of
of an inch. The lead‘ angle is developed‘ by winding
the present- invention are the‘ following:
the wire so that it is lead from a‘ notch 22 falling‘ on‘
radius R, for example, to a' notch 21Jfalling on an‘
adjacent radius such as’ R’ (FIG43‘).
In addition, it is necessary to secure‘ the extremities
of the wire (usually a single length‘ of wire is utilized)‘
'
(l) The: roll’ may be readily’resharPened by‘ merely
taking an additional cut from’ the; exterior surfac‘e’l of»
the roll utilizing‘ a grinding wheel or the: like- as- pre
viously described to remove dull pins and‘ thereafter
etching the- composite‘ roll to- develop new: segments of
wire 33‘ operative to‘ perforate or pierce a- continuously
advancing web in theF manner‘ previously‘ described;
(2') The punch roll fabricated; according? to‘ the dis
‘ closed process is very- economical and-1 the-naturelofl the
35 process permits‘ one to grind an exceedingly ?‘atl su‘ré
on the sides of the washer 23 to prevent unwinding 30
byv any appropriate‘ scheme such as welding, soldering,
or the like.
After the washers 23‘ are wound they are immersed
in- a1 bath of ‘masking material such" as resin‘ orv wax
for the purpose of coating the exposed‘ surfaces of
the washer 23 and the‘ wire with a protective skin; A
preferred masking bath may comprise a solution of‘ 50%
medium molecular weight polyethylene‘ and,50% paraf
face upon the: projecting’: end- of each- wire 201 allowing‘
a very‘ sharp corner between the plane» of~ tbe‘ifa'cel-o?
each wire and‘ the longitudinal axis thereof.-
‘
A preferred‘ arrangement for mounting a pin studded
roll manufactured in accordance with the present
After the masking step, a‘ plurality of wound washers 40 punch
invention; with respect‘ to a continuously advancing'web
?n wax suitably heated to a' ?uid‘ state;
23 and blank washers '18 are assembled in face to face
relationship upon a mandrel or rod, such as the axle‘
11-, shown in FIG. ‘6. The blank washers and the wire
of. sheet material is shown in FIG. 1. As stated pre
viously, in this?gure there-is shown a punch studded‘
roll indicated generally by the‘: reference numeral 10
Wound washers are disposed alternately and are squeezed ‘
tightly together axially by suitably setting up the nut 45 mounted immediately over a‘ supply roll‘ S.
Note that the punch roll is so’ mounted that the sup
26 threadedlyv engaging the axle 11 as at‘ 27. With
the blank‘ and wound‘ discs thus arranged, a composite
roll is formed‘ wherein‘ blank washers of aluminum arev
disposed on either side of aluminum washers wound
ply roll operates as an anvil’ so- that, in effect; the
' continuously advancing web
of material‘ is‘ perforated
before it leaves the roll. The thickness’ of the webv
with steel‘ wire so' that most of‘ the wire and resinous 50 being perforated‘ is frequently‘ of’ a very small‘ dimen- '
sion (ranging from the‘ order 0tv 1710007 of an inch» to‘
material is sandwiched between washers.
5/1000 of’ an inch) andv should the punches penetrate
The next process step involves removing a portion of
through more than‘ one thickness of the web while upon"
the exterior surface of the composite roll; and, in the
the: supply'roll- the perforations sofor'med create a ran
disclosed embodiment of the invention, a grinding wheel
28 is utilized to take a uniform cut from the‘ exterior 55 dom pattern;
. ' Frequently it is desirable to utilize light sanding rolls.
surface of the roll e?ective to remove the" notches 211
and to cut that portion of the wire 20 which was‘ dis-7 to clean up the paper surface by wiping on loose chads
or particles of‘ paper after perforation.
posed in the notches 21.
Aiter the grinding operationv the exterior surface of
the roll presents the appearance shown most clearly in
Obviously a variety ofarrangements'» of the present
invention may be devised both in the process and" ap
FIG; 7 wherein one may observe a plurality of ' discs‘
paratus‘ embodiments thereof without departing from
of aluminum having sandwiched therebetween radially‘
projecting‘ lengths of wire uniformly spaced and dis
posed in circumferential array, each having a ?at head
the. spirit and scope of the invention;
or face identi?ed by the reference numeral 29 and hav
ing a diameter of about i’yiooo of an inch corresponding
to‘ the diameter of the wire with which the discs 23
were wound. Note, too, that the space between ad
What is claimed is:
_
1; A method of fabricating‘ a pin studded’ web per,
forating roll comprising the steps of providing a plurality
of metal washers or apertnred discs, providing‘ a quantity
of metallic strand material, assembling the‘ discs and‘ the
strand material on a mandrel tov form a roll wherethe roll
is formed compositel'y of metal“ strands sandwiched‘ be
tween
discs in alternating fashion, said metallic strands‘
resin or masking material wherein the axial squeeze of 70
being'disposed radially so as to project toward thelexterior
they discs, upon assembly of the roll was‘ effective to
of the roll and selectively dissolving portions of the-roll‘
extrude the resin‘ in the interstices between. wires as is
effective tolexpos'e a-- circumferential array of pinsapro
apparent in FIG; 7..
'
jecting radially from-the roll.
~7
The next process step embraces immersing a marginal
portion of the exterior cylindrical surface of the roll: in‘ 75 2-. Amcthod- of fabricatinga pin studded web perforat
ja‘c'ent‘ discs not occupied by wire, strands in ?lled with:
2,021,732
ing roll comprising the steps of providing a plurality of
washers or apertured discs, machining circumferentially
disposed grooves in some of the discs about the external
and internal margins thereof, winding the grooved discs
in toroidal fashion with a wire ?lament so that the wire
encircles the disc with the wire ?lament disposed in the
grooves, dipping the wound disc in a masking solution
effective to coat the wire and the disc uniformly, assem
6
on a mandrel to form a roll where the roll is formed com
positely of unwound discs and wound discs arranged in
alternating fashion, removing a portion of the exterior
surface of the roll eifective to reduce the exterior diameter
thereof and effective to cut the wire strands and selec
tively removing a circumferential margin of each disc
eifective to expose a circumferential array of pin-like
protuberances projecting radially from the roll.
bling a plurality of wound and unwound discs on a man
4. The method of claim 2 wherein the masking mate
drel to form a roll where the roll is formed compositely 10 rial is swept away after the margin of the roll is removed.
of unwound discs and wound discs arranged in alternat
ing fashion, squeezing the compositely arranged discs to
gether axially effective to combine the discs in a com
pact mass, removing a portion of the exterior surface of
the roll e?ective to reduce the exterior diameter thereof 15
and effective to cut the wire strands and selectively re
moving a circumferential margin of the roll effective to
expose and array of pins projecting radially from the roll.
3. A method of fabricating a pin studded web per
forating r011 comprising the steps of providing a plurality 20
of Washers or apertured discs, winding the discs in toroidal
fashion with a Wire ?lament so that the wire encircles the
disc, assembling a plurality of wound and unwound discs
References Cited in the ?le of this patent
UNITED STATES PATENTS
704,789
1,904,100
1,958,694
1,975,487
Elson _______________ __ July 15,
Taylor ______________ __ Apr. 18,
Chandler ____________ __. May 15,
Topping ______________ __ Oct. 2,
1902
1933
1934
1934
2,101,753
2,455,348
2,518,838
2,667,090
Rambold _____________ .._ Dec. 7, 1937
Barstow ______________ __ Dec. 7, 1948
Tempe ______________ __ Aug. 15, 1950
Martin ______________ __ Jan. 26, 1954
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