Title of Invention	SELF-SUPPORTING OPTICAL FIBER SPOOL AND METHOD FOR THE PRODUCTION THEREOF
Abstract	The invention relates to a fiberglass spool comprising a self-supporting roll (12) having layers of windings (20) located one above the other of an optical fiber (13) for transmitting data that may be unwound from the interior of the roll outwards, wherein the windings (20) are fixed to one another by means of an adhesive bonding agent. In order to realize a sufficiently stable, self-supporting roll (12) that may be reliably unwound from the inside outwards without loops being pulled out of the roll (12), the roll (12) is structured as a cross-winding and a hydrocarbon-based, salt water-resistant, chemically inert impregnating material that may be liquefied by heating is used as the bonding agent.

Title of Invention

SELF-SUPPORTING OPTICAL FIBER SPOOL AND METHOD FOR THE PRODUCTION THEREOF

Abstract

The invention relates to a fiberglass spool comprising a self-supporting roll (12) having layers of windings (20) located one above the other of an optical fiber (13) for transmitting data that may be unwound from the interior of the roll outwards, wherein the windings (20) are fixed to one another by means of an adhesive bonding agent. In order to realize a sufficiently stable, self-supporting roll (12) that may be reliably unwound from the inside outwards without loops being pulled out of the roll (12), the roll (12) is structured as a cross-winding and a hydrocarbon-based, salt water-resistant, chemically inert impregnating material that may be liquefied by heating is used as the bonding agent.

Full Text	SELF-SUPPORTING OPTICAL FIBER SPOOL AND METHOD FOR THE PRODUCTION THEREOF The invention relates to a glass-fibre spool and to a method for its production, according to the precharacterizing clause of Claim 1 and Claim 7, respectively. In a known glass-fibre spool of this type (US 5 493 627), a polymer resin dissolved in methane, for example polyvinyl acetate resin such as Vinac B15 or a polyamide resin such as Elvamide 8063 resin from the Dupont Company, is used as the binding agent to stabilize the self-supporting winding. The concentration of the binding agent is chosen so as to achieve an adhesive force which ensures a sufficiently robust, self-supporting winding, from which the glass fibre can be unwound from the interior of the winding, without any risk of the glass fibre being kinked. The glass fibre is wound onto a winding former in a plurality of layers by machine, with the binding agent, dissolved in methanol, being applied to every fourth glass fibre layer by means of a brush during the winding process. Once the winding has been wound completely, the winding former is removed from the winding, and the binding agent cures slowly. The glass fibre spool with a length of 10.5 km of glass fibre wound on it is used to transmit information and data between an underwater vehicle and a projectile which can be deployed from the underwater vehicle, and is, for example, arranged in the underwater projectile, which is deployed from a submarine. During the deployment and during the movement of the projectile and/or of the underwater vehicle, the glass fibre is unwound from the winding. The invention is based on the object of specifying a glass-fibre spool with a self-supporting winding, which can be unwound reliably from the innermost layer with a low tensile force and without loops being pulled off the winding, or the glass fibre becoming kinked and destroyed, during the unwinding process. Because of the underwater application, the winding to be unwound should not release any environmentally damaging substances during the process. According to the invention, the object is achieved by the features of Claim 1. The glass-fibre spool according to the invention has the advantage that the use of a crossed-over winding technique to form the winding ensures that the glass fibre is unwound easily and reliably and that the glass fibre being unwound does not also tear off adjacent turns which are adhesively bonded to it, so that no loose loops are formed to impede the glass fibre being unwound from the binding interior. The impregnation substance that is used improves the cohesiveness of the winding and ensures during the unwinding process that the glass fibre is detached uniformly, without any jerking, from the adjacent turn. By virtue of its characteristics, the impregnation substance allows a simplified process to be used for its introduction into the winding, in that the winding is impregnated with the impregnation substance after the latter has been liquefied by heating, for example using a vacuum impregnation process. After solidification again, the impregnation substance has uniform physical characteristics, such as ductility, adhesion force and viscosity, in the normal operating temperature range for the glass fibre, which is between 0° and 40°C. The impregnation substance is solvent-free, has no reservations with regard to health, is not soluble in salt water, and is environmentally friendly. Expedient embodiments of the glass-fibre spool according to the invention as well as advantageous developments and refinements of the invention will become evident from the further Claims 2 to 6. One advantageous method for production of the glass- fibre spool is specified in Claim 7. Rotation of the glass fibre on itself while the crossed-over winding is being wound up ensures that the glass fibre has no twist when it is pulled off. Expedient embodiments of the method according to the invention as well as advantageous developments and refinements of the method will become evident from the further Claims 8 to 15. The invention will be described in more detail in the following text with reference to one exemplary embodiment, which is illustrated in the drawing. In this case, illustrated schematically, the drawing shows a longitudinal section through a glass-fibre spool. The glass-fibre spool, which is illustrated schematically in the form of a longitudinal section in the drawing, is used, for example, for data traffic between a submarine and a homing torpedo launched from the submarine. A glass-fibre spool such as this is arranged both in the torpedo and in the submarine, with the glass-fibre ends of the two glass-fibre spools being mechanically and optically connected to one another by means of an optical coupler. One such scenario is illustrated and described, for example, in EP 0 337 254 A2. As can be seen from the section illustration, the glass-fibre spool has a glass fibre 13 which is wound up to form a multilayer winding 12, for transmission of information and has a length of several kilometres. The initial twisting while the glass-fibre is being wound up ensures that the glass-fibre is not twisted as it runs out. The winding 12 is in the form of a crossed- over winding with crossing turns 20, as is known by way of example from thread spools. In order to illustrate a crossed-over winding such as this, the schematic longitudinal section shows a number of successive turns 20, with that part of the turns 20 which is located at the front, although this cannot actually be seen because of the section location, being shown by dashed lines. The winding start 14 of the winding 12 is located at the start of the innermost turn layer, and the winding end 15 is located at the end of the outermost turn layer. The winding 12 has no winding former, but is designed to be self-supporting, by the individual turns 20 being fixed on one another by means of a suitable adhesive binding agent. An impregnation substance which is resistant to seawater, is chemically inert, can be liquefied by heat and is based on hydrocarbon is used as the binding agent. Examples of the impregnation substance are Vaseline, for example Zinke DAB10 or Merkur Type 641 wax or wax gel, for example Sasol Type Varagel 6527 , a mixture of Vaseline and high-melting-point waxes, for example Ceridust 3719 or Ceridust 9325F from the Clariant company, in which case further additives can be mixed with them, a mixture of white oil and wax, for example WOP150PB from the Merkur company with a wax component of 25% to 30% Ceridust 3719, or a mixture of castor oil and calcium soap (calcium-12 hydroxystearate) with a castor-oil component of 85% to 95%. The phase transition temperature of all these substances, at which the phase or the aggregate state changes, that is to say the substances change from the solid phase to the liquid phase and vice versa, is above the normal operating temperature to which the winding 12 is subject. This operating temperature is normally 0° to 40°C. The self-supporting, dimensionally stable winding 12 is inserted into a hollow-cylindrical mould 16, which is surrounded by a metallic housing 17. The housing 17 is produced from sea-water-resistant aluminium and has openings 18, 19 on the end faces. The opening 18 is used for the glass fibre 13, which continues from the winding end 15, to pass through, and the coaxially arranged opening 19 is used for the glass fibre 13, which leads to the winding start 14, to pass through, and forms the outlet opening for the glass fibre 13 as it is being unwound. In this design, the glass fibre spool is inserted, for example, into a chamber in the stern of a torpedo, with the chamber being flooded via a water inlet. The glass fibre 13 runs centrally out of the winding 13 and is then guided in a guide tube until it emerges from the torpedo body, with the guide tube running centrally through the propulsion motor and the propulsion shaft of the torpedo, and projecting at the end beyond the torpedo propulsor. The glass fibre 13, which leads away from the winding end 15 and is passed out through the opening 19, is connected to a transmitting and receiving device, integrated in the torpedo body, for data traffic. The described glass-fibre spool is produced as follows: The long glass fibre 13 is wound by machine onto a winding former in a crossed-over winding configuration with a multiplicity of turn layers located one above the other. During the winding process, the glass fibre 13 is tensioned, and the tensile force acting on the glass fibre 13 is reduced increasingly from winding of the inner turn layer to winding of the outermost turn layer. The tensile force can in this case be reduced continuously or discontinuously from one turn layer to the next. The tensile force is kept constant within one turn layer. This has the advantage that no light losses, or only negligibly small light losses, occur in the glass fibre 13 at the crossing points of the turns 20, which represents slight kink points of the glass fibre 13, so that the attenuation in the transmission of information or data can be kept low. In order to avoid the possibility of the end turns 20 of the winding 12 sliding off during the winding process, the winding 12 has a number of turns 20 per winding layer that decreases from the inside outwards, so that the completed winding 12 has a trapezoidal shape when seen in a section along the winding axis, as can be seen from the drawing. The winding 12 may, of course, also be wound as a complete hollow cylinder. Once the glass fibre 13 has been wound completely, the winding 12, with the winding former left in it, is removed from the winding machine and is impregnated with the chemically inert, sea-water-resistant impregnation substance based on hydrocarbon, as has been described in various examples above, with the impregnation substance having previously been liquefied by heating to a temperature which is higher than the temperature at which the impregnation substance changes its phase or its aggregate state. In this case, this temperature is higher than 70°C. The winding 12, which is supported by the winding former, is impregnated, for example, by means of a vacuum impregnation process or in a plunge bath. Drips are then allow to fall off the impregnated winding 12 until a predetermined impregnation level is reached for the winding 12. This impregnation level is defined in such a way that the weight of the winding 12, as reduced by drips off it, is measured, and the dripping-off process is terminated on reaching a predetermined weight. The winding 12 is now cooled down to a temperature which is below its phase transition temperature, for example to room temperature. In consequence, the impregnation substance starts to solidify and changes back to its solid, gel- like state. While the winding 12 is cooling down, the winding former is aligned horizontally and is driven to rotate such that the impregnation substance, which is initially still liquid, is distributed uniformly in the winding 12. Once the winding 12 has cooled down, the winding former is removed. AMENDED CLAIMS Field at the International Office on January 21, 2009 (01.21.2009) 1. Method for production of a glass-fibre spool having a multilayer, self-supporting winding (12) of a glass fibre (13) for transmission of information which can be unwound from the winding interior, in which the glass fibre (13) is wound onto a winding former to form a winding (12), and the winding former is subsequently removed from the winding (13), characterized in that the winding (12) is wound in a crossed-over configuration, in that the winding (12), with the winding former left in it, is impregnated with an impregnation substance which is chemically inert, is resistant to seawater, is liquefied by heat and is based on hydrocarbon, in that a predetermined impregnation level of the winding (12) is set by dripping off a portion of the impregnation substance, and in that the winding (12) is cooled down to below the phase transition temperature of the impregnation substance with the winding former rotating and being aligned horizontally, and the winding former is removed from the cooled-down winding (12). 2. Method according to Claim 1, characterized in that the glass fibre (13) is itself rotated on each turn during the winding process. 3. Method according to Claim 1 or 2, characterized in that, during the winding process, the glass fibre (13) is subjected to a tensile force, and in that the tensile force is reduced increasingly from the winding of the innermost turn layer to the winding of the outermost turn layer. 4. Method according to Claim 3, characterized in that the tensile force is kept constant while winding one turn layer. 5. Method according to one of Claims 1 to 4, characterized in that an impregnation substance is used which has a phase transition temperature which is above the maximum operating temperature of the glass-fibre spool. 6. Method according to one of Claims 1 to 5, characterized in that the impregnation of the winding (12) is carried out in a vacuum. 7. Method according to one of Claims 1 to 6, characterized in that the impregnation level of the winding (12) is determined by measuring the weight of the dripping-off winding (12). 8. Method according to one of Claims 1 to 7, characterized in that Vaseline, preferably DAB10 Zinke or Merkur Type 641, is used as the impregnation substance. 9. Method according to one of Claims 1 to 7, characterized in that a wax or wax gel, preferably Sasol Type Varagel 6527, is used as the impregnation substance. 10. Method according to one of Claims 1 to 7, characterized in that a mixture of Vaseline and high- melting-point waxes, preferably Clariant Ceridust 3719 or Clariant Ceridust 9325F, preferably with further additives, is used as the impregnation substance. 11. Method according to one of Claims 1 to 7, characterized in that a mixture of white oil and wax is used as the impregnation substance, preferably Merkur WOP150PB with a wax component of 25-30% of Ceridust 3719. 12. Method according to one of Claims 1 to 7, characterized in that a mixture of castor oil, preferably with a proportion of 85% - 95%, and calcium soap is used as the impregnation substance. The invention relates to a fiberglass spool comprising a self-supporting roll (12) having layers of windings (20) located one above the other of an optical fiber (13) for transmitting data that may be unwound from the interior of the roll outwards, wherein the windings (20) are fixed to one another by means of an adhesive bonding agent. In order to realize a sufficiently stable, self-supporting roll (12) that may be reliably unwound from the inside outwards without loops being pulled out of the roll (12), the roll (12) is structured as a cross-winding and a hydrocarbon-based, salt water-resistant, chemically inert impregnating material that may be liquefied by heating is used as the bonding agent.

Full Text

SELF-SUPPORTING OPTICAL FIBER SPOOL AND METHOD FOR THE
PRODUCTION THEREOF
The invention relates to a glass-fibre spool and to a
method for its production, according to the
precharacterizing clause of Claim 1 and Claim 7,
respectively.
In a known glass-fibre spool of this type
(US 5 493 627), a polymer resin dissolved in methane,
for example polyvinyl acetate resin such as Vinac B15
or a polyamide resin such as Elvamide 8063 resin from
the Dupont Company, is used as the binding agent to
stabilize the self-supporting winding. The
concentration of the binding agent is chosen so as to
achieve an adhesive force which ensures a sufficiently
robust, self-supporting winding, from which the glass
fibre can be unwound from the interior of the winding,
without any risk of the glass fibre being kinked. The
glass fibre is wound onto a winding former in a
plurality of layers by machine, with the binding agent,
dissolved in methanol, being applied to every fourth
glass fibre layer by means of a brush during the
winding process. Once the winding has been wound
completely, the winding former is removed from the
winding, and the binding agent cures slowly. The glass
fibre spool with a length of 10.5 km of glass fibre
wound on it is used to transmit information and data
between an underwater vehicle and a projectile which
can be deployed from the underwater vehicle, and is,
for example, arranged in the underwater projectile,
which is deployed from a submarine. During the
deployment and during the movement of the projectile
and/or of the underwater vehicle, the glass fibre is
unwound from the winding.
The invention is based on the object of specifying a
glass-fibre spool with a self-supporting winding, which
can be unwound reliably from the innermost layer with a
low tensile force and without loops being pulled off
the winding, or the glass fibre becoming kinked and
destroyed, during the unwinding process. Because of the
underwater application, the winding to be unwound
should not release any environmentally damaging
substances during the process.
According to the invention, the object is achieved by
the features of Claim 1.
The glass-fibre spool according to the invention has
the advantage that the use of a crossed-over winding
technique to form the winding ensures that the glass
fibre is unwound easily and reliably and that the glass
fibre being unwound does not also tear off adjacent
turns which are adhesively bonded to it, so that no
loose loops are formed to impede the glass fibre being
unwound from the binding interior. The impregnation
substance that is used improves the cohesiveness of the
winding and ensures during the unwinding process that
the glass fibre is detached uniformly, without any
jerking, from the adjacent turn. By virtue of its
characteristics, the impregnation substance allows a
simplified process to be used for its introduction into
the winding, in that the winding is impregnated with
the impregnation substance after the latter has been
liquefied by heating, for example using a vacuum
impregnation process. After solidification again, the
impregnation substance has uniform physical
characteristics, such as ductility, adhesion force and
viscosity, in the normal operating temperature range
for the glass fibre, which is between 0° and 40°C. The
impregnation substance is solvent-free, has no
reservations with regard to health, is not soluble in
salt water, and is environmentally friendly.
Expedient embodiments of the glass-fibre spool
according to the invention as well as advantageous
developments and refinements of the invention will
become evident from the further Claims 2 to 6.
One advantageous method for production of the glass-
fibre spool is specified in Claim 7. Rotation of the
glass fibre on itself while the crossed-over winding is
being wound up ensures that the glass fibre has no
twist when it is pulled off.
Expedient embodiments of the method according to the
invention as well as advantageous developments and
refinements of the method will become evident from the
further Claims 8 to 15.
The invention will be described in more detail in the
following text with reference to one exemplary
embodiment, which is illustrated in the drawing. In
this case, illustrated schematically, the drawing shows
a longitudinal section through a glass-fibre spool.
The glass-fibre spool, which is illustrated
schematically in the form of a longitudinal section in
the drawing, is used, for example, for data traffic
between a submarine and a homing torpedo launched from
the submarine. A glass-fibre spool such as this is
arranged both in the torpedo and in the submarine, with
the glass-fibre ends of the two glass-fibre spools
being mechanically and optically connected to one
another by means of an optical coupler. One such
scenario is illustrated and described, for example, in
EP 0 337 254 A2.
As can be seen from the section illustration, the
glass-fibre spool has a glass fibre 13 which is wound
up to form a multilayer winding 12, for transmission of
information and has a length of several kilometres. The
initial twisting while the glass-fibre is being wound
up ensures that the glass-fibre is not twisted as it
runs out. The winding 12 is in the form of a crossed-
over winding with crossing turns 20, as is known by way
of example from thread spools. In order to illustrate a
crossed-over winding such as this, the schematic
longitudinal section shows a number of successive turns
20, with that part of the turns 20 which is located at
the front, although this cannot actually be seen
because of the section location, being shown by dashed
lines. The winding start 14 of the winding 12 is
located at the start of the innermost turn layer, and
the winding end 15 is located at the end of the
outermost turn layer. The winding 12 has no winding
former, but is designed to be self-supporting, by the
individual turns 20 being fixed on one another by means
of a suitable adhesive binding agent. An impregnation
substance which is resistant to seawater, is chemically
inert, can be liquefied by heat and is based on
hydrocarbon is used as the binding agent. Examples of
the impregnation substance are Vaseline, for example
Zinke DAB10 or Merkur Type 641 wax or wax gel, for
example Sasol Type Varagel 6527 , a mixture of Vaseline
and high-melting-point waxes, for example Ceridust 3719
or Ceridust 9325F from the Clariant company, in which
case further additives can be mixed with them, a
mixture of white oil and wax, for example WOP150PB from
the Merkur company with a wax component of 25% to 30%
Ceridust 3719, or a mixture of castor oil and calcium
soap (calcium-12 hydroxystearate) with a castor-oil
component of 85% to 95%. The phase transition
temperature of all these substances, at which the phase
or the aggregate state changes, that is to say the
substances change from the solid phase to the liquid
phase and vice versa, is above the normal operating
temperature to which the winding 12 is subject. This
operating temperature is normally 0° to 40°C.
The self-supporting, dimensionally stable winding 12 is
inserted into a hollow-cylindrical mould 16, which is
surrounded by a metallic housing 17. The housing 17 is
produced from sea-water-resistant aluminium and has
openings 18, 19 on the end faces. The opening 18 is
used for the glass fibre 13, which continues from the
winding end 15, to pass through, and the coaxially
arranged opening 19 is used for the glass fibre 13,
which leads to the winding start 14, to pass through,
and forms the outlet opening for the glass fibre 13 as
it is being unwound. In this design, the glass fibre
spool is inserted, for example, into a chamber in the
stern of a torpedo, with the chamber being flooded via
a water inlet. The glass fibre 13 runs centrally out of
the winding 13 and is then guided in a guide tube until
it emerges from the torpedo body, with the guide tube
running centrally through the propulsion motor and the
propulsion shaft of the torpedo, and projecting at the
end beyond the torpedo propulsor. The glass fibre 13,
which leads away from the winding end 15 and is passed
out through the opening 19, is connected to a
transmitting and receiving device, integrated in the
torpedo body, for data traffic.
The described glass-fibre spool is produced as follows:
The long glass fibre 13 is wound by machine onto a
winding former in a crossed-over winding configuration
with a multiplicity of turn layers located one above
the other. During the winding process, the glass fibre
13 is tensioned, and the tensile force acting on the
glass fibre 13 is reduced increasingly from winding of
the inner turn layer to winding of the outermost turn
layer. The tensile force can in this case be reduced
continuously or discontinuously from one turn layer to
the next. The tensile force is kept constant within one
turn layer. This has the advantage that no light
losses, or only negligibly small light losses, occur in
the glass fibre 13 at the crossing points of the turns
20, which represents slight kink points of the glass
fibre 13, so that the attenuation in the transmission
of information or data can be kept low. In order to
avoid the possibility of the end turns 20 of the
winding 12 sliding off during the winding process, the
winding 12 has a number of turns 20 per winding layer
that decreases from the inside outwards, so that the
completed winding 12 has a trapezoidal shape when seen
in a section along the winding axis, as can be seen
from the drawing. The winding 12 may, of course, also
be wound as a complete hollow cylinder.
Once the glass fibre 13 has been wound completely, the
winding 12, with the winding former left in it, is
removed from the winding machine and is impregnated
with the chemically inert, sea-water-resistant
impregnation substance based on hydrocarbon, as has
been described in various examples above, with the
impregnation substance having previously been liquefied
by heating to a temperature which is higher than the
temperature at which the impregnation substance changes
its phase or its aggregate state. In this case, this
temperature is higher than 70°C. The winding 12, which
is supported by the winding former, is impregnated, for
example, by means of a vacuum impregnation process or
in a plunge bath. Drips are then allow to fall off the
impregnated winding 12 until a predetermined
impregnation level is reached for the winding 12. This
impregnation level is defined in such a way that the
weight of the winding 12, as reduced by drips off it,
is measured, and the dripping-off process is terminated
on reaching a predetermined weight. The winding 12 is
now cooled down to a temperature which is below its
phase transition temperature, for example to room
temperature. In consequence, the impregnation substance
starts to solidify and changes back to its solid, gel-
like state. While the winding 12 is cooling down, the
winding former is aligned horizontally and is driven to
rotate such that the impregnation substance, which is
initially still liquid, is distributed uniformly in the
winding 12. Once the winding 12 has cooled down, the
winding former is removed.
AMENDED CLAIMS
Field at the International Office on January 21, 2009
(01.21.2009)
1. Method for production of a glass-fibre spool
having a multilayer, self-supporting winding (12) of a
glass fibre (13) for transmission of information which
can be unwound from the winding interior, in which the
glass fibre (13) is wound onto a winding former to form
a winding (12), and the winding former is subsequently
removed from the winding (13), characterized in that
the winding (12) is wound in a crossed-over
configuration, in that the winding (12), with the
winding former left in it, is impregnated with an
impregnation substance which is chemically inert, is
resistant to seawater, is liquefied by heat and is
based on hydrocarbon, in that a predetermined
impregnation level of the winding (12) is set by
dripping off a portion of the impregnation substance,
and in that the winding (12) is cooled down to below
the phase transition temperature of the impregnation
substance with the winding former rotating and being
aligned horizontally, and the winding former is removed
from the cooled-down winding (12).
2. Method according to Claim 1, characterized in that
the glass fibre (13) is itself rotated on each turn
during the winding process.
3. Method according to Claim 1 or 2, characterized in
that, during the winding process, the glass fibre (13)
is subjected to a tensile force, and in that the
tensile force is reduced increasingly from the winding
of the innermost turn layer to the winding of the
outermost turn layer.
4. Method according to Claim 3, characterized in that
the tensile force is kept constant while winding one
turn layer.
5. Method according to one of Claims 1 to 4,
characterized in that an impregnation substance is used
which has a phase transition temperature which is above
the maximum operating temperature of the glass-fibre
spool.
6. Method according to one of Claims 1 to 5,
characterized in that the impregnation of the winding
(12) is carried out in a vacuum.
7. Method according to one of Claims 1 to 6,
characterized in that the impregnation level of the
winding (12) is determined by measuring the weight of
the dripping-off winding (12).
8. Method according to one of Claims 1 to 7,
characterized in that Vaseline, preferably DAB10 Zinke
or Merkur Type 641, is used as the impregnation
substance.
9. Method according to one of Claims 1 to 7,
characterized in that a wax or wax gel, preferably
Sasol Type Varagel 6527, is used as the impregnation
substance.
10. Method according to one of Claims 1 to 7,
characterized in that a mixture of Vaseline and high-
melting-point waxes, preferably Clariant Ceridust 3719
or Clariant Ceridust 9325F, preferably with further
additives, is used as the impregnation substance.
11. Method according to one of Claims 1 to 7,
characterized in that a mixture of white oil and wax is
used as the impregnation substance, preferably Merkur
WOP150PB with a wax component of 25-30% of Ceridust
3719.
12. Method according to one of Claims 1 to 7,
characterized in that a mixture of castor oil,
preferably with a proportion of 85% - 95%, and calcium
soap is used as the impregnation substance.

The invention relates to a fiberglass spool comprising a self-supporting roll (12) having layers of windings (20)
located one above the other of an optical fiber (13) for transmitting data that may be unwound from the interior of the roll outwards,
wherein the windings (20) are fixed to one another by means of an adhesive bonding agent. In order to realize a sufficiently stable,
self-supporting roll (12) that may be reliably unwound from the inside outwards without loops being pulled out of the roll (12), the
roll (12) is structured as a cross-winding and a hydrocarbon-based, salt water-resistant, chemically inert impregnating material that
may be liquefied by heating is used as the bonding agent.

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Patent Number

271720

Indian Patent Application Number

121/KOLNP/2010

PG Journal Number

10/2016

Publication Date

04-Mar-2016

Grant Date

01-Mar-2016

Date of Filing

12-Jan-2010

Name of Patentee

ATLAS ELEKTRONIK GMBH

Applicant Address

SEBALDSBRÜCKER HEERSTRASSE 235, 28309 BREMEN, GERMANY

Inventors:

#	Inventor's Name	Inventor's Address
1	BRENNER, AXEL	AMMERLÄNDER STR. 4, 28259 BREMEN, GERMANY
2	HUCKFELDT, SÖNKE	DÜNENWEG 14, 25336 ELMSHORN, GERMANY
3	LINDNER, JÜRGEN	HAINBUCHENRING 7, 27777 GANDERKESEE, GERMANY
4	BARTHOLOMÄUS, RALF	ERNST-BARLACH-STRASSE 1A, 22880 WEDEL, GERMANY
5	JUNGE, WILFRIED	VAHRER STR. 179, 28309 BREMEN, GERMANY
6	FUHRMANN, DIRK	ROLANDSTRASSE 13A, 22880 WEDEL, GERMANY

PCT International Classification Number

G02B6/44; G02B6/44

PCT International Application Number

PCT/EP2008/007267

PCT International Filing date

2008-09-05

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	10 2007 043 719.8	2007-09-13	Germany