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Nov. 19, 19.46.
Filed Nov. 27, .1942
JRM‘MilZin ‘w
5% java, 1 W
Patented Nov. 19,1946
James R. McMillin and Stanley H. Lake, ‘Newark,
Ohio, assignors to Owens-Corning Fiberglas
Corporation, ,Toledo, Ohio, a, corporation ‘of
Application November 27, 1942, Serial No. 467,278
7 Claims.
(C1. 19-145)
' This invention relates to a ?brous product and
to an improved me'thodland apparatus for man
ufacturing such a product.
on the line 2—-2 of Figure l; and . t
Figure ‘3 is a diagrammatic view of the sliver
' of this invention showing the reinforcing core or
of a drum and to pullthe'depo'sited ?bers off the
drum to form a sliver of glass ?bers. This meth
od is disclosed and‘ claiiriédY‘in theTucker and,
lllaiilnan Patent No. 2,264,345, dated December 2,
‘Figure 2 is a sectional view taken substantially
‘In the manufacture of certain types of ?brous
products such, for example, as glass or other
partly in section of apparatus constructed in
accordance with this invention;
thermoplastic materialsit has been customary to
collect attenuatédiviglass ?bers‘ on‘the periphery
' Figure 1 is a diagrammatic sideelevational view
‘ Although this invention concerns itself more
particularly with the manufacture of slivers
formed of glass, nevertheless, other materials hav
ing ‘similar characteristics may be employed.
Several examples of materials which may be used
Although slivers of the character disclosed in
the above patent have'».proved very satisfactory
in connection with the present invention, are ar
in practice, nevertheless, iii the manufacture of 15 ti?cial silk commonly known as “nylon,” vinyl
acetate, cellulose acetate, resin, sugar, and vinyli
certain products, it is desirablettc‘increase the
dene chloride resin.
tensile strength of the sliver. With this in view
the present invention contemplates reinforcing
With the above in view reference is now made
to the drawing wherein it will be noted that the
the sliver with a continuous strand which may be
a single ?lament or may be a yarn of desired
reference character 10 indicates a container or
material, preferably glass.
melter adapted to contain a supply ll of molten
Heretofore reinforced asbestos slivers have been
produced by feeding a reinforcing thread and an
asbestos sliver together between the usual rub
bing aprons or belts for condensing the sliver, 25
thermoplastic material such'as glass. A bushing
and folding the sliver around thethread by the
or relatively small ori?ces l3.
action of the belts. This process is not satisfac
The ori?ces l3 are designed to enable a glass
stream to be drawn through each ori?ce by a
tory in the treatment ‘of glass ?bers, however,
I2 is suitably supported at the bottom of the con
tainer in communication with the supply ll of
molten glass and comprises a pluraltiy of nipples
blower l4 supported below the bushing l2 and
sent an added, otherwise unnecessary step in the 30 having the further function of forming atten~
uated ?bers from the‘ glass streams. In detail,
production of the slivers.
the blower 14 comprises complementary sections
It is an object of the present invention to pro
l5 and I6 respectively positioned at opposite sides
duce a reinforced glass sliver without increasing
of the glass streams issuing from the bushing
the number of steps or operations over those
l2. Thesection I6 ‘is provided with a chamber
needed to produce an ordinary glass sliver.
because the use of rubbing aprons would repre
11 communicating with a source of ?uid under
pressure,;such as-a steam or air, by means of a
conduit 18 and also communicating at one end
a continuous strand ‘of material as the ?bers are
with the adjacent end of a chamber I9 formed
produced, the strand being advanced along a pre
determined path of travel coinciding with the 40 in the section 15. It will also be noted from Fig
More particularly this invention contemplates
distributing glass ?bers in tangled relation about
movement of the sliver as‘it is formed, and, if
desired, applying an adhesive to the strand prior
to distributing the ?bers about the strand so that
the ?bers will adhere to the strand.
, A further'feature‘ of this invention is to pull a
continuous strand of material across a ?ber col;
lecting surface and through the zone of ?ber
deposition on the surface by winding the strand
around the rotatable member usually employed to
ure 1 that the sections of the blower 14 are re
spectively formed with discharge ori?ces arranged
to discharge ?uid under pressure in a downward
direction ‘toward opposite sides of the glass’
streams. The pressure of ‘the ?uid is sufficient
to apply the pulling force on the glass streams
required to draw the same from their respective‘
ori?ces and form attenuated glass ?bers.
The glass ?bers 20 attenuated by the blower
pull the body of ?bers off the said surface and 50 M are collected in a web on the periphery of a
drum 2| suitably supported for rotation beneath
draft it to the form of a sliver. .
The foregoing, as well as other objects, will
the blower M in spaced relation to the latter.
In accordance with conventional practice the pe-'
riphery of the drum is perforated and sufficient
ceeds, especially when considered in connection
55 suction is created in the drum by means not shown
with the accompanying drawing, wherein:v
be made more apparent as this description pro
to collect:
. ____________ v.4
be waXJresln, or any similar adhesive capable of
the periphery of i
securing the ‘?bers to the continuous strand as
'theelatter is drawn through the ?ber deposition
the drum. ,
The web of ?bers collected or disposed-on the;
- periphery of the drumis pulled off of ‘the, drum ' ""zone- on the drum by the rotatable member 22.
As a result of the above, a sliver of ‘the type
by a member 22 supported for rotation at the
shown in Figure 3 of the drawing is produced
front side of the drum 2| in spacedielat-ion to the
latter; As the web of fibers is pulled off of the .whaving a core in the form of a strand such, for
drum it is drafted to the form of a sliver 23 and ~ , example, as a length of glass yarn and having
-lon_g or theoretically continuous glass ?bers in
the latter is wound around the rotatable member
22. The ?bers produced’ by the process just de 10 terlaced about the core so that the latter acts
scribed are usually known as staple glass fibers. ‘ to effectively reinforce the sliver. It will also be
They are-substantially continuous in length when , understood from the foregoing that the glass
?bers are distributed about the strand by ad
they-are formed ‘but are broken up to some extent
vancing the latter through the zone of ?ber dep
asthey are‘ deposited on the surface‘ of the ‘drum
osition on the drumor other ?ber collecting sur
and to greater extent when they are pulled from
face and, consequently, the relatively long ?bers '
the surface and draftedcinto a sliver. The re
also extend in the general direction of length of
sulting sliver contains, predominantly, fibers of
the strand but are intertangled to an extent pro
great length but of lengths manytimes less than
, viding integrity in the body of ?bers about the
the total length of the sliver, with the ?bers inter
laced and tangled to an extent providing a. high 20 core. This arrangement of the ?bers around the
strand provides a sliver having very high tensile
degree of integrity in the sliver both in the direc
strength and one which will not‘ break during
tion of itslength and in transverse directions.
subsequent weaving or knitting operations. Also,
by depositing /the ?bers in tangled relation about
the reinforcing strand, the ?bers-become inter
- - The presenttiinyention provides a sliver of this ,
type reinforced with/a strand of glass or other “
?bers. The strand is'incorporated in the sliver 25
in such a way that the original ?u?y nature of
the sliver is vnot altered as-it would be if the strand
and the sliver were intertwisted or if the sliver
> was folded about the strand.
laced about the strand to such an extent that the
strand is separated from the body of ?bers only
with great difficulty, demonstrating lthe degree of
integrity ofthe product of the present invention.
Retention of the‘
For some applications of the reinforced sliver
it has been found advantageous to employ as a
original ?u?lness is‘especially desirable where the 30
sliver is to be served onto a wire to form a layer
of ?brous insulation.
" reinforcing core a strandmade up of one or more
To obtain maximum strength in the reinforced
?laments of a thermoplastic resinous material
ing streams of molten ‘glass, gatheringthe ?bers
thus formed into. grglip's__-or strandsand winding
the strands upon a drum-or'spooli, The ?nished
heat treated after it is served on-the wire to soften
the thermoplastic material ‘of . the reinforcing
; core. to an extent causing’ it to ?ow and thorough
are substantially continuous in'length throughout
" Yide the-needed‘ dielectric resistance.
' sliver it has been found preferable to employ as ' suchas Vinylite, polystyrene, “Seran,” and simi
the reinforcing core a strand or yarn oi’ continui 35 lar resins. This is particularly valuble where the
' sliver is to be served onto a wire to form va layer
ous glass ?laments. Glass ?laments of the con’
‘ of insulating material thereover. The sliver is
tinuous type are madetby continuously attenuat
strands containa: large number-'of‘?laments that: r ly' impregnate the ?brous insulating layer to pro
the length of the strand
‘The thermoplastic core may also be employed
where the sliver is to be used forother purposes
and wherever it is desired to reinforce the silver
until it has been twisted, woven, knitted, or pros-‘
The way in which the sliver liisreinforced with
a strand of material, preferably glass, and either
in-the form of a strand of glass ?laments or in
the form of a yarn, will now be described in de;
tail. The reference character 24 in Figure 1 in
dicates a continuous strand packaged onn’a spool
25 supported. attnezreanside'of the __?ber collect
ing drum 2 |."’In the present instance, the strand
essed in some other manner, but where the rein
forcing is not required after processing but is ad
vlzimtageously replaced‘ by" impregnation of the
is unwound from the spool 25 by'the rotatable"
_ - member: 2-2 previously described as operable to _
ious modi?catl'onssof the present invention '
,,_rnay vbe made within thespirit of the invention
and within the scope of the appended claims.
RUH-théjz?bBISO? the ‘periphery of the collecting
We claim:
drum-2|. ' As shown in Figure l, the strand is
'1. Apparatus for forming a reinforced sliver .
comprising a drum supported for rotation in‘ a
position to collect a web of intertangled ?bers as
his formed, a package comprising a strand of
tended downwardly around a pad 21 to the rotat- '
continuous glass ?bers supported at one side of
able member 22. The locations'of the pad 21 and
the rotatable member 22 with respect to the col 00 thedrum, a rotatable member supported at the
opposite side of the drum for pulling the deposited
lecting drum 2| is such as to enable the strand
?bers oi! the periphery of the drum in the di
to pass over the collecting drum 2|; in contact
with the periphery of the latter at the zone of
rection of rotation of the drum to form a sliver
and for also unwinding the package by pulling
the ?ber deposition on the periphery of the drum.
The above arrangement is such that the ?bers
the strand across the periphery of the drum
through the zone of ?ber deposition on the drum
are distributed about theistrand as the latter is
whereby said ?bers are drawn‘ substantially par
drawn across the drum 2| by the rotatable mem
passed upwardly through an eye or guide 28 sult-‘
ably supported above the package “and is ex
ber 22 and the strand is felted with the ?bers. > allel with said strand, means supported adjacent
‘ In accordance with this invention the ?bers are,
the package in a position to engage the strand
secured to the strand by coating the strand with 70 as it is unwound from the package and operable ,
a suitable adhesive prior to moving the strand
' across the drum 2 |. In detail, the strand is coated ,
with an adhesive material by the pad 21 and this
material is supplied to the pad by a suitable reser
to apply an adhesive, on the strand to cause the
?bers to adhere to the strand as the latter is
pulled across the periphery of the drum, and
' means for applying radially inward forces against
voir 28. The adhesive material employed may 75' said?bersaround said strand.
2. The method which comprises continuously
' ?laments onto a moving supporting surface and
forming on the periphery-of a rotatable member
a glass ?ber web in which the ?bers are hap
causing them to accumulate in matted form on
said. surface with. the ?laments extending pro
hazardly arranged and interlaced with, each
‘ miscuously and haphazardly but in directions
other,_ advancing ell-‘continuous strand ofef‘glass
mainly substantially parallel with?sald surface,
?bers‘ across thm‘peri'phery of 7 said member
continuously passing a preformed strand along
. I through the fiber deposition zone. on the member
said surface in the direction of movement there
and in- the direction of its rotation, applying an '
of, and continuously drawing the mat of ?laments
adhesive'to the strand prior to engaging the web
and the strand from said surface as the mat is
tocaus'e the ?bers to adhere thereto, and pulling 10 formed, at a rate greater than the rate of move
said web and strand together from-the periphery
ment of said surface, whereby the mat of ?la
of the rotatable member in the general direction
of movement of the periphery and atv a rate suf
ments is attenuated as it is drawn together with
the strand from said surface, and concentrating
' ?ciently higher than the rate of movement of the '
themat of ?laments to compact sliver form about
periphery to draw the ?bers of the matinto sub 15 the strand as it advances beyond said surface.
stantial parallelism with the strand.‘ ' p
6. Apparatus for forming a reinforced sliver
3. The method which comprises winding a con
tinuous strand, causing the strand to‘ pass across
the periphery of a rotatable member in the di
rection of its rotation during the winding opera
tion, simultaneously forming and depositing a
comprising a drum supported for rotation in a
position to collect a web of intertangled ?bers as
it is formed, meansv for supporting a package com
20 prising a strand of continuous glass ?bers at one
side of the drum, a rotatable member supported
glass ?ber web in which the ?bers are haphazardly
arranged and interlaced with each other ‘on the
periphery of the rotatable member about the
. at the opposite side of the drum for pulling the
deposited ?bers off the periphery of the drum in
the direction of rotation of the drum to form a
strand, and pulling saidlweb and strand together 25 silver and for also unwinding the said package
from the periphery of the rotatable member at a -
by pulling the strand across the periphery of the
drum through the zone of ?ber deposition on the
rate sufficiently higher than the rate of movement
of the periphery to draw the ?bers of the mat
‘ drum, whereby said ?bers are drawn substantially
into substantial parallelism with the strand.
parallel with saidstrand, and means for applying
4. The method of forming a reinforced strand 30 radially inward forces against said ?bers around
‘or sliver which comprises projecting ?ne glass ?l
said strand.
'1 aments onto a movingsnpporting surface and
causing them toaccumulate in’matted form on
said surface with the ?laments extending promis
cuously and haphazardly but in directio?simainly
substantially parallel with said surface, continu
ously passing apreformed strand along said sur-u
facev in the direction of movement thereof, and
continuously drawing the mat of ?laments and
7. The method which comprises winding 9. con
tinuous strand of thermoplastic. resinous mate- 4
rial, causing the strand to pass across the periph
35 ery of’a rotatable member in the direction of its
rotation during the winding operation, simulta-~
neously forming and depositing a glass ?ber web
‘ in which the ?bers are haphazardly arranged and
interlaced with each other‘ on the periphery of
"the strand from said surface as the mat is formed 40 the rotatable member about the strand and pull
at a vrate greater than the rate of movement of
i-ng said web andstrand together from the pe-"'
' said surface, and simultaneousl transforming
rlphery of the “rotatable member at a rate suf
the mat into the form of a reingrced strand or
> sliver in- which the ?laments are arranged main
ly' in substantial‘ parallelism' about said strand.
5. The method of forming a reinforced strand
I. or silver which comprises projecting ?ne glass
?'ciently higherthan the rate of movement of the
periphery to draw the'?bers of the mat into sub- '
stantlal parallelism‘ with the strand.
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