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Oct. 15, ‘1946.'
(5; w, BROWN
'
INSULATED WIRE AND
CABLE
Filed July 14, 1943
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2,409,539 4
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gig; s sjjam ' l
INVENTOR
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‘7%.
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ATTORNEY
2,409,539
Patented Oct. 15, 1946
UNITED, STATES PATENT orrice
INSULATED ‘WIRE AND ‘ CABLE
Grover
Brown, Wyckoff, N. J., assignor to The
Okonite-Company, Passaic, N. 3., a corporation
of . New Jersey
Application July 14, 1943,‘Serial No.'494,'62'3
.2 Claims.
(CI. 41-33)
2
1
'Thisinvention is ‘directed'to an improvement
in‘the'm'arking ‘of cables, and has'for one-of its
objects torprovide a method by which a ‘perma
nent marking can vbe applied toithe ?nished cable
‘without the necessity of employing anything 'but
the most simple equipment.
'
In order that my invention .may be ‘readily
understood and in order that its’advantages may
vbe appreciated'by'thoseiskilled in this art, a brief
reference willbe made to some of the prior meth 10
ods employed‘in this connection.
_
>
amination of a cable whichhas been marked
in'accordance with vmy invention I have found
that the ink has penetrated the surface vof the
‘cable covering to an appreciable extent instead
of being a mere surface coating. This'is prob
ably due to the fact thatthe ink, as above men
tioned, is a solution of the same material as’com
‘poses the surface‘of the‘cable being marked. It
is applied‘while the cable ‘covering is in an un
vulcanized ‘condition, ‘and the pressure of the
metal strip is considerable, so thatvthe ink be
comes vulcanized into the surface of the cable.
In any event there is this penetration. I find also
that the markings are of a permanent nature in
insulation {can ‘be printed on the one pass, and 15 that they remain-?exible so there is no tendency
.One “method which is very-common is to vmark
the ?nished cable with a type Wheel. It ‘is ob
vious that with this method only ‘one side of "the
the colored symbols are generally 'no‘better than
ordinary-ink in permanency.
.In anothermethod ‘which has been usedsome
\what extensively colored . rubber labels have been
for them to ?ake off in bending the cable. While
in time and under the right conditions there may
be a surface fading of the markings the original
color is readily detected by lightly scraping the
‘
applied to the insulation surface, while in other 20 cable covering.
Not only does my invention excel in the respects
cases cable has been ,marked by passing a stemalready pointed out,_as compared with prior proc
oil through a die along with the cable to be
esses, but it has another practicable and com
marked to provide either raised or depressed
mercial advantage in that a wide sheet of metal,
markings at the :surface of the cableinsulation.
The rubber labelmethod is very .slow and rela 25 suflicient for the marking of several cables, may
be prepared, the ink for a plurality of identical
tively ‘expensive, while with the stencil method
markings or for as many different markings as
the marking is not in a contrasting color.
the sheet vwill accommodate being applied to the
Generally speaking, .the method of the present
sheet in a single operation. after which the sheet
invention involves the application, in ink, of the
desired marking to one face of a metal strip, tin, 130 may be slit to provide a plurality of strips each
of the proper widthfor‘but one cable.
for example, which is say from ten to thirtyimils
It is to be noted also that my invention is of
in thickness, and of such a width that when fold
advantage in still another respect in that because
ed about a cable to be marked the metal will
the markings extend completely around‘the cable
completely surround the cable. Upon the marked
they may take the form of lines extending cir
face of the metal strip I calender a thin layer '
cumferentially‘of the cable as distinguished from
of a rubber-like compound which may "or-‘may not
lengthwise or longitudinal marking which'is of
be a compound of the same materials as ‘the in
considerable practicable worth in color coding
sulation of the cable. The strip thusprepared'i's
and identi?cation.
.
then folded lengthwise about the cable insula
It will be appreciated still further that with my
tion, the assembly subjected to vulcanization and
improved method the one cable may be'marked
then the metal is stripped off. As an alternative
to this procedure the metal strip'may have mark_
in several colors if desired. In fact the possible
ings applied to it and then be folded immediately
color combinations are almost ‘without 'limit‘ so
about the cable insulation, as distinguished from
that I‘ am able to approximate the color codes
?rst applying a rubber-like compound to the met
possible with coloredbraids.
al and folding this assembly about the‘unvulcan
It will be understood and appreciated by those
ized insulated cable.
skilled in this art that my invention possesses
The ink I employ 'for the markings is prefer~
great advantages over prior practices where it is
ably composed of a solution of the compound to
desired to mark cables which are to be cabled
+50
which the markings are to be applied and suit
together and enclosed in an overall sheath.
able color pigment.
In the accompanying drawing:
It will be seen from the foregoing that the
Fig. 1 is a fragmentary plan view of a metal
cable covering is vulcanized in the last stage of
sheet employed in the practice of the invention;
my method, just prior to the stripping of the
Figs. 2 and 3 are cross sectional views and Fig.
metaL- This is advantageous in that upon ex 55
2,409, 539
3
4 an elevational view showing the various pro
gressive stages or steps of my process; and
Figs. 5, 6 and 7 are similar views of an alter
native procedure.
4
The assembly as illustrated in Fig. 3 is then
subjected to curing to vulcanize the compounds
I4 and I6 and unite them into a homogeneous
mass or layer, after which the metal is stripped
o? to leave the marked article of Fig. 4, the
It is to be appreciated that no attempt has
been made to draw the ink markings to scale.
mould solution above referred to facilitating this
It is to be understood also that the term “mark
removal without marring the cable surface and
ing" is to be interpreted herein to the exclusion
its markings.
of indenting and embossing.
From all of the foregoing it will be appreciated
Referring to the drawing in detail: 2 desig 1O that my invention provides a method for mark
nates a conductor the covering of which is to be
ing the insulation of cables which is very simple
marked before this covering has been cured.
in execution yet distinctly superior to the prior
4 designates a metal sheet, of tin or other
methods brie?y referred to herein.
suitable metal. For purposes of illustration I
The alternative method illustrated in Figs. 5, 6
15
have shown this sheet of a width sufficient to
and 7 involves the application of insulation I8
make strips for the marking of four cables. The
to a conductor 2 in the same manner, for ex
sheet 4 is thin, say from twelve to thirty mils,
ample, as suggested for Figs. 2, 3 and 4. In this
depending upon the dimensions of the cable to be
alternative procedure I apply ink markings such
marked.
as 6 to the face of a thin metal sheet which is
In accordance with the method as practiced 20 ?rst coated with the mould solution above referred
in Figs. 2, 3 and 4 I ?rst apply a mould solution
to, the sheet is then slitted into strips and the
to the face of the Sheet 4. This solution may be
metal strip formed directly about the unvulcan
wax, lacquer, etc., for example, and is employed
ized insulation I6 of the cable. The cable is then
to facilitate removal of the metal after the mark
vulcanized and the metal stripped off.
ing of the cable has been completed. After this 25
It is to be understood that changes may be
solution has dried and set I apply the desired
made in the details described within the purview
markings in ink to the coated face of the sheet,
of my invention.
as shown at 6, 8, l0 and I2 in Fig. i. In order
vWhat I claim is:
that the possibilities and ?exibility of my method
1. The method of marking the surface of the
may be appreciated I have illustrated four differ
insulation of insulated wire and cable and vul
ent marking designs. Just for illustrative pur
canizing the same in a continuous operation,
poses markings 6, B and I0 are shown as lines
which method comprises applying desired mark
of various shapes extending transversely of the
ings in ink to one face of an elongated metal
sheet while markings I2 may be the manufac
strip, calendaring a layer of unvulcanized rubber
turer's name or customer’s name, for instance, 35 like compound upon the inked face of said Strip,
extending lengthwise of the sheet and repeated
said ink comprising color pigment and a solution
over and over.
of a compound similar to the compound compos
I next calender a rubber-like compound upon
the inked face of the metal sheet. This com»
ing the said unvulcanized layer, forming this as
pound, designated I4, is unvulcanized and may be, 40 sembly about the unvulcanized insulation of the
wire or cable to bring the rubber-like'compound
into intimate contact with the said insulation and
completely envelop the same, subjecting the as
tion. The ink composing the markings is pref
sembly to a vulcanizing temperature with said
erably a solution of the same materials as the
compound I4. For example, the compound HZ 45 metal strip restraining the insulation against dis
tortion and then removing the metal strip, where
may be a synthetic rubber made by polymeriza
by the said markings are transferred to the ex
tion of chloropreue, and the ink may be a'toluene
although not necessarily, of the same materials
as the main body I6 of the cable cover or insula
terior of said compound and the wire or cable in
sulation and said compound are vulcanized.
2. The method of marking the surface of the
color desired in the ?nished markings. The metal 50
insulation of insulated wire and cable and vul
sheet 4 is now slitted along the lines I8 to form
canizing the insulation in a continuous opera
four strips each of which is of a width sufhcient
tion, which method comprises coating one face
to enable the same to be bent or formed longi~
of a metal strip with a mould solution which fa
tudinally about the cable covering completely to
surround the same as illustrated in Fig. 3.
65 cilitates removal of the metal strip after the
marking of the surface of the insulation has been
In Fig. 2 I show the unvulcanized but covered
completed, applying desired markings in ink to
cable with one of the narrow metal strips adja
the coated face of the metal strip, forming the
cent thereto preparatory to being bent or formed
strip about the insulation of the wire or cable
lengthwise about the main body I6 of the cable
cover as illustrtaed in Fig. 3. This main body I 6 60 prior to vulcanizing the insulation, the metal
solution of this material plus a suitable color
pigment which will depend of course upon the
strip being applied with its inked face in contact
of the cable covering is preferably, although not
with the wire or- cable insulation and completely
necessarily, applied to the conductor 2 by the
enveloping the same, with said metal strip re
strip method, that is, by making up a sheet of the
straining the insulation against distortion sub
desired compound, cutting it into strips, splicing
the strips to form a long length and leading the 65 jecting the assembly to vulcanizing temperature
to vulcanize the insulation and effect transfer of
conductor and the strip through suitable appara
the ink markings to and penetration of the same
tus which shapes the strip about the conductor.
Similar apparatus may be employed to form the
into the insulation, and then removing the metal
strip.
compound I4 and inked metal strip about the
cable covering.
GROVER W. BROWN.
70
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