U.S. patent application number 10/587918 was filed with the patent office on 2007-12-06 for modularly constructed paper machine covering.
Invention is credited to Arved H. Westerkamp.
Application Number | 20070277951 10/587918 |
Document ID | / |
Family ID | 34832557 |
Filed Date | 2007-12-06 |
United States Patent
Application |
20070277951 |
Kind Code |
A1 |
Westerkamp; Arved H. |
December 6, 2007 |
Modularly Constructed Paper Machine Covering
Abstract
A covering for paper machines, paperboard machines or tissue
machines, which is constructed from a construction kit includes a
plurality of prefabricated web-shaped material layers. Each
web-shaped material layer is configured dependent upon a category
and operating conditions of the covering, and the plurality of
prefabricated web-shaped material layers are stacked atop one
another and are joined to one another at least in sections,
two-dimensionally, and in a manner that prevents the plurality of
prefabricated web-shaped material layers from being detached. The
invention also relates to a method for producing the inventive
covering.
Inventors: |
Westerkamp; Arved H.;
(Dettingen, DE) |
Correspondence
Address: |
TAYLOR & AUST, P.C.
P.O. Box 560
142. S Main Street
Avilla
IN
46710
US
|
Family ID: |
34832557 |
Appl. No.: |
10/587918 |
Filed: |
December 9, 2004 |
PCT Filed: |
December 9, 2004 |
PCT NO: |
PCT/EP04/53360 |
371 Date: |
May 10, 2007 |
Current U.S.
Class: |
162/358.2 ;
156/60; 28/110 |
Current CPC
Class: |
D21F 7/083 20130101;
D21F 1/0063 20130101; D21F 1/0036 20130101; D21F 1/0054 20130101;
Y10T 156/10 20150115 |
Class at
Publication: |
162/358.2 ;
156/060; 028/110 |
International
Class: |
D21F 7/08 20060101
D21F007/08; D21F 1/00 20060101 D21F001/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 6, 2004 |
DE |
10 2004 006 103.3 |
Claims
1-36. (canceled)
37. A method for the modular production of coverings of different
categories for use in one of paper machines, paperboard machines
and tissue machines, said method comprising the steps of:
prefabricating a construction kit of web-shaped material layers;
selecting a plurality of said web-shaped material layers from said
construction kit depending on a category and operating condition of
the covering to be produced; stacking said web-shaped material
layers atop one another; and joining said web-shaped material
layers to one another at least in sections, two-dimensionally, and
in a manner that prevents said web-shaped material layers from
being detached.
38. The method according to claim 37, wherein said stacking of said
web-shaped material layers comprises stacking them in an order
which depends on the category and the operating conditions of the
covering.
39. The method according to claim 37, wherein said joining of said
web-shaped material layers comprises joining at least two
web-shaped material layers together chemically.
40. The method according to claim 39, wherein said joining at least
two web-shaped material layers together chemically is effected by
an interface-active bond.
41. The method according to claim 40, wherein said interface-active
bond is effected by one of vulcanizing, welding and melting.
42. The method according to claim 39, wherein said joining at least
two web-shaped material layers together chemically is effected by
adding a bonding medium.
43. The method according to claim 42, wherein said bonding medium
is an adhesive.
44. The method according to claim 42, wherein said bonding medium
forms a material layer which is arranged between said joined
material layers.
45. The method according to claim 44, wherein said bonding medium
forms a foamed material layer between said joined material
layers.
46. The method according to claim 37, wherein said joining of said
web-shaped material layers comprises joining at least two
web-shaped material layers together mechanically.
47. The method according to claim 46, wherein said joining at least
two web-shaped material layers together mechanically is effected by
pressing.
48. The method according to claim 37, wherein said joining of said
web-shaped material layers comprises joining at least two
web-shaped material layers together by a textile joining
method.
49. The method according to claim 48, wherein said textile joining
method is effected by one of sewing and pinning.
50. A covering for use in one of paper machines, paperboard
machines and tissue machines, said covering comprising: a
construction kit including a plurality of prefabricated web-shaped
material layers, each said web-shaped material layer being
configured dependent upon a category and operating conditions of
the covering, said plurality of prefabricated web-shaped material
layers being stacked atop one another and joined to one another at
least in sections, two-dimensionally, and in a manner that prevents
said plurality of prefabricated web-shaped material layers from
being detached.
51. The covering according to claim 50, wherein said web-shaped
material layers have a stacking order that is dependent upon the
category and the operating conditions of the covering.
52. The covering according to claim 50, wherein said web-shaped
material layers fulfill specific functions.
53. The covering according to claim 50, wherein said web-shaped
material layers are joined to one another in sections via a bonding
medium that fulfills specific functions one of on its own and in
combination with at least one of said material layers.
54. The covering according to claim 50, wherein the construction
kit of prefabricated web-shaped material layers comprises at least
one material layer influencing the surface of a fibrous web and at
least one wear-stable material layer.
55. The covering according to claim 54, wherein said material layer
influencing the surface of a fibrous web is one of a textile areal
structure and a non-textile areal structure.
56. The covering according to claim 54, wherein said wear-stable
material layer is one of a textile areal structure and a
non-textile areal structure.
57. The covering according to claim 50, wherein the construction
kit of prefabricated web-shaped material layers comprises at least
one dimension-stable material layer.
58. The covering according to claim 57, wherein said
dimension-stable material layer is one of a textile areal structure
and a non-textile areal structure.
59. The covering according to claim 50, wherein said construction
kit of prefabricated web-shaped material layers comprises at least
one material layer influencing the liquid adsorption capacity.
60. The covering according to claim 59, wherein said material layer
influencing the liquid adsorption capacity has one of a high liquid
adsorption capacity and a low liquid adsorption capacity.
61. The covering according to claim 60, wherein said material layer
with a high liquid adsorption capacity is one of a textile areal
structure and a non-textile areal structure.
62. The covering according to claim 50, wherein said construction
kit of prefabricated web-shaped material layers comprises at least
one anti-rewetting material layer.
63. The covering according to claim 62, wherein said anti-rewetting
material layer is one of a textile areal structure and a
non-textile areal structure.
64. The covering according to claim 50, wherein said textile areal
structure is one of a weave structure, a fleece, a thread plaiting,
and a warp knitting.
65. The covering according to claim 50, wherein said non-textile
areal structure is one of: at least one of a structured film and a
penetrated film; at least one of a structured membrane and a
penetrated membrane; and a foamed layer.
66. The covering according to claim 65, wherein said film is at
least one of extruded and rolled.
67. The covering according to claim 65, wherein said foamed layer
has a defined pore size.
68. The covering according to claim 65, wherein said foamed layer
has a plurality of defined pore sizes.
69. The covering according to claim 68, wherein said foamed layer
has a defined pore size in a transverse profile.
70. The covering according to claim 50, wherein said web-shaped
material layers are joined to one another with at least one of a
chemical and a mechanical bond.
71. The covering according to claim 70, wherein said web-shaped
material layers are joined to one another by different bonding
methods depending on the category, the operating conditions, and
the material layers to be joined together.
72. The covering according to claim 71, wherein said web-shaped
material layers are mutually offset in one of a machine direction
and a transverse machine direction and joined together,
two-dimensionally, in sections so that the covering forms two end
areas which complement each other in form and function and can be
joined together.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates to a method for the modular
production of coverings for paper machines, paperboard machines or
tissue machines and to a covering for a paper machine, paperboard
machine or tissue machine.
[0003] 2. Description of the Related Art
[0004] Paper machines, paperboard machines or tissue machines have
coverings in the forming section, press section and drying
section.
[0005] The different categories of coverings, namely forming
meshes, press felts and dryer fabrics, must meet many different
requirements, for example with regard to dewatering behavior,
moisture adsorption capacity and the like.
[0006] Furthermore, coverings of the same category must meet
different requirements depending on the operating conditions. For
example, the requirements for the structure of the side of a
forming mesh facing the fibrous web in the production process for
graphic paper differ fundamentally from those for the production of
tissue.
[0007] Due to the different categories of coverings described
above, each of which has to meet many different requirements, the
historical development has seen the manufacturers of coverings
produce, for practically every category and operating condition, a
covering type which differs almost fundamentally from the covering
types of other categories and operating conditions.
[0008] For example, covering manufacturers often produce forming
meshes with different weave patterns for specific customers.
SUMMARY OF THE INVENTION
[0009] The current invention provides a method for providing
coverings, as well as coverings which are easier and cheaper to
produce than those coverings known from the prior art.
[0010] The invention is based on the idea of reducing the
production costs of coverings for paper machines, paperboard
machines or tissue machines by simplifying the production method
for the entire product range of paper machine coverings.
[0011] The method according to the invention provides for producing
different categories of coverings modularly from a construction kit
of prefabricated web-shaped material layers. According to the
invention, several web-shaped material layers are selected from the
construction kit of prefabricated web-shaped material layers
depending on the category and operating condition of the covering
to be produced. The web-shaped material layers selected from the
construction kit are stacked atop one another and joined to one
another at least in sections, two-dimensionally, and in a manner
that prevents them from being detached.
[0012] In other words, a method is proposed which provides a
construction kit of prefabricated material layers. By defining a
construction kit of prefabricated web-shaped material layers for
the entire product range of paper machine coverings and by
selecting prefabricated web-shaped material layers from the
construction kit, depending on the category and the operating
conditions of the covering, the number of different material layers
and, for example, weave structures is greatly reduced.
[0013] Whereas in the past a different weave structure was required
for each operating condition for example, it is possible in
accordance with the invention to produce coverings for the
different categories and operating conditions by combining several
of the prefabricated web-shaped material layers.
[0014] According to one embodiment, provision is made for the order
in which the selected web-shaped material layers are stacked to
depend on the category and the operating conditions of the
covering. The flexibility in using the prefabricated material
layers is thus increased, as different properties of the covering
can be achieved depending on the order in which the selected
web-shaped material layers are stacked.
[0015] In this connection it should be noted that the prefabricated
web-shaped material layers are constructed such that they fulfill,
on their own or in combinations, specific functions such as damping
properties, dimensional stability, wear stability, surface
properties, liquid adsorption capacity and the like.
[0016] According to another embodiment, provision is made for the
construction kit of prefabricated material layers to include at
least one material layer influencing the surface of a fibrous web
and at least one wear-stable material layer. In this case the
material layer influencing the surface of the fibrous web is
understood to be the material layer which terminates the covering
in the direction of the fibrous web. Furthermore, the wear-stable
material layer is understood to be the material layer which
terminates the covering in the direction of the paper machine.
[0017] According to another embodiment, provision is made for the
construction kit of prefabricated material layers to include at
least one dimensionally stable material layer. The dimensionally
stable material layer can be configured either as a material layer
which is constructed separately from the two previously mentioned
material layers or as an integral component of the one or other
previously mentioned material layers.
[0018] Various possibilities for the construction of the
above-mentioned material layers are conceivable.
[0019] Another embodiment of the invention provides for the
material layer influencing the surface of the material web to be a
textile or a non-textile areal structure.
[0020] Another embodiment of the invention provides furthermore for
the wear-stable material layer to be a textile or a non-textile
areal structure.
[0021] Another embodiment of the invention provides for the
construction kit of prefabricated material layers to include at
least one material layer influencing the liquid adsorption
capacity. The material layer influencing the liquid adsorption
capacity can be constructed either separately from the previously
mentioned material layers or as an integral component of one of the
previously mentioned material layers.
[0022] The material layer influencing the liquid adsorption
capacity can be constructed either as a material layer with a high
liquid adsorption capacity or as a material layer with a low liquid
adsorption capacity.
[0023] A material layer with a high liquid adsorption capacity
should have a liquid adsorption capacity which is greater than 50%
of the total capacity of the material layer, in particular
preferably greater than 70% of the total capacity of the material
layer and most preferably greater than 80% of the total capacity of
the material layer.
[0024] A material layer with a low liquid adsorption capacity
should have a liquid adsorption capacity which is less than 50% of
the total capacity of the material layer, in particular preferably
less than 30% of the total capacity of the material layer and most
preferably less than 20% of the total capacity of the material
layer.
[0025] According to another embodiment of the invention, provision
is made for the construction kit of prefabricated web-shaped
material layers to include at least one anti-rewetting material
layer.
[0026] Furthermore, other embodiments provide for the dimensionally
stable material layer and/or the material layer influencing the
liquid adsorption capacity and/or the anti-rewetting material layer
to be textile or non-textile areal structures.
[0027] A textile areal structure is understood to be a weave
structure or a fleece or a thread plaiting or a warp knitting.
[0028] Furthermore, a non-textile areal structure is understood to
be a structured and/or penetrated film or a structured and/or
penetrated membrane and/or a foamed layer.
[0029] It is advantageous, for example, for the material layer with
a large liquid adsorption capacity to be a foamed layer.
[0030] Furthermore, it is advantageous for the material layer with
a small liquid adsorption capacity to be a foamed layer or a
penetrated film or a membrane.
[0031] Furthermore, it is advantageous for the foamed layer to have
a defined pore size. By providing a defined pore size it is
possible, for example, to establish the liquid adsorption capacity
and hence the dewatering behavior. Furthermore, it is also
conceivable for the foamed layer belt to have several defined pore
sizes.
[0032] According to an embodiment of the invention the foamed layer
has a defined pore transverse profile (i.e., different pore sizes
in the transverse profile of the material layer). It is thus
possible to selectively establish the dewatering behavior and the
pressing behavior by way of the web width of the paper machine
covering, as the result of which the fibrous web transverse profile
can be selectively established.
[0033] A film mentioned above can be produced by an extrusion
method and/or a rolling method for example.
[0034] Various possibilities for joining together the several
material layers selected from the construction kit are
conceivable.
[0035] For example, it is possible for at least two of the material
layers to be joined together chemically. Furthermore, it is
possible for at least two of the material layers to be joined
together mechanically and/or by means of a textile joining method.
The different material layers of a covering according to the
invention can be joined together by just one or the other ways.
However, it is also possible for the material layers to be joined
together not only mechanically but also by textile and chemical
ways.
[0036] For example, a first material layer of a covering according
to the invention can be joined mechanically to a second material
layer and the second material layer can be joined chemically to a
third material layer. Furthermore, the third material layer can be
joined by a textile joining method to a fourth material layer of
this covering, with the fourth material layer being joined
mechanically and chemically to a fifth material layer.
[0037] According to another embodiment the chemical bond is
effected by an interface-active bond. In this connection an
interface-active bond is understood to be a bond resulting from
vulcanizing or melting or welding (i.e., ultrasonic welding). In
other words, the interfaces of the two material layers which are to
be joined together are changed/activated in such a way that they
bond together without a bonding medium.
[0038] Another embodiment of the invention provides for the
chemical bond to be effected by introducing a bonding medium. In
this case the bonding medium can be an adhesive for example.
[0039] Furthermore it is possible for the bonding medium itself to
form a material layer between the joined material layers, in which
case the bonding medium is a foamed material layer for example,
which is arranged between the material layers that are joined
together and bonds said material layers together.
[0040] The bonding medium constructed as a separate material layer
can fulfill specific functions on its own or in combination with
one or more material layers. For example, by combining the bonding
medium with one or more material layers it is possible to exert an
advantageous influence on the properties of the covering according
to the invention.
[0041] If the material layers are joined together mechanically it
is conceivable for them to be pressed together.
[0042] If the material layers are joined together by a textile
joining method it is possible for them to be sewn or pinned
together.
[0043] If the covering is one which is not constructed of material
webs in the form of endless belts, it makes sense for the various
web-shaped material layers which are stacked atop one another to be
joined together, two-dimensionally, in sections that are mutually
offset in machine direction so that the covering forms two end
areas which complement each other in form and function and can be
joined together. Through the material layers which are mutually
offset in machine direction and joined together, two-dimensionally,
in sections, the covering forms two end areas which complement each
other in form and function and can be joined together,
two-dimensionally, so that the covering is constructed in the form
of an endless belt. The two-dimensional bond between the two end
areas is particularly stable and durable.
[0044] If the covering is constructed of several material layers
arranged side by side over its width, it also makes sense for the
material layers which are stacked atop one another to be mutually
offset at least in sections transverse to the machine direction so
that above and/or under neighboring material layers of a certain
layer of the covering there is always a material layer which
overlaps with both material layers arranged side by side.
BRIEF DESCRIPTION OF THE DRAWINGS
[0045] The above-mentioned and other features and advantages of
this invention, and the manner of attaining them, will become more
apparent and the invention will be better understood by reference
to the following description of (an) embodiment(s) of the invention
taken in conjunction with the accompanying drawing(s), wherein:
[0046] FIG. 1 is a detail in longitudinal section of a forming mesh
according to the invention,
[0047] FIG. 2 is a detail in longitudinal section of a press felt
according to the invention,
[0048] FIG. 3 is a detail in longitudinal section of a dryer fabric
according to the invention,
[0049] FIG. 4 is shows the two end areas of the forming mesh of the
invention according to FIG. 1,
[0050] FIG. 5 is a detail in cross section of a forming mesh
according to the invention,
[0051] FIG. 6 is a detail in cross section of a press felt
according to the invention,
[0052] FIG. 7 is a detail in cross section of a dryer fabric
according to the invention.
[0053] Corresponding reference characters indicate corresponding
parts throughout the several views. The exemplification(s) set out
herein illustrate(s) one preferred embodiment of the invention, in
one form, and such exemplification(s) (is)(are) not to be construed
as limiting the scope of the invention in any manner.
DETAILED DESCRIPTION OF THE INVENTION
[0054] FIGS. 1 to 4 show coverings which are produced from a
construction kit of prefabricated web-shaped material layers 2, 3,
4, 11 and 15. All the web-shaped material layers 2, 3, 4, 11 and 15
of the construction kit are formed in this embodiment as
non-textile areal structures.
[0055] FIG. 1 shows in longitudinal section in machine direction
sections of a forming mesh 1 according to the invention. The
forming mesh 1 has a paper-side web-shaped material layer 2 through
which the surface of the fibrous web formed on the forming mesh is
essentially influenced, and a machine-side web-shaped material
layer 3 through which the wear behavior of the forming mesh 1 is
essentially influenced. The machine-side material layer 3 is thus a
wear-stable material layer 3. In the embodiment in question the
machine-side material layer 3 also has dimension-stabilizing
properties. The machine-side material layer 3 is thus also a
dimension-stable material layer 3, as the result of which the
dimension-stable and the wear-stable material layer 3 form an
integral unit.
[0056] Arranged between the paper-side material layer 2 and the
machine-side material layer 3 is a material layer 4 influencing the
liquid absorption capacity.
[0057] The material layers 2 to 4 were taken from the construction
kit of prefabricated web-shaped materials layers 2, 3, 4, 11 and 15
in order to produce the forming mesh 1 of the invention (see also
FIGS. 2 and 3).
[0058] In the embodiment in question the material layer 2 is formed
as a non-textile areal structure in the form of a penetrated film
with holes 5 and is produced from a material such as PE, PET, PPS
or PA. The paper-side material layer 2 is undetachably joined,
two-dimensionally at the interface 7, to the material layer 4
influencing the liquid absorption capacity by chemical ways through
application of a bonding medium 72 in the form of an adhesive
72.
[0059] The material layer 4 influencing the liquid absorption
capacity is formed as a foamed layer with pores 9. In this case the
pores have a defined size.
[0060] In the embodiment in question the material layer 3 is formed
as a non-textile areal structure in the form of a penetrated film
with holes 6 and is produced from a material such as PE, PET, PPS
or PA. The machine-side material layer 3 is undetachably joined,
two-dimensionally at the interface 8, to the material layer 4
influencing the liquid absorption capacity by chemical ways through
application of a bonding medium 72 in the form of an adhesive
72.
[0061] FIG. 2 shows in longitudinal section in the machine
direction sections of a press felt 10 according to the invention.
The press felt 10 is formed by the paper-side web-shaped material
layer 2 known from FIG. 1, the machine-side web-shaped material
layer 3 known from FIG. 1, the material layer 4 influencing the
liquid absorption capacity known from FIG. 1, by a material layer
11 likewise influencing the liquid absorption capacity and by an
anti-rewetting material layer 15.
[0062] All the material layers 2, 3, 4, 11 and 15 were taken from
the construction kit of prefabricated web-shaped material layers 2,
3, 4, 11 and 15 in order to produce the press felt 10 of the
invention. The order in which the individual material layers are
stacked atop one another is defined by the operating conditions for
which the press felt 10 of the invention is designed.
[0063] The material layer 2 is joined, at the interface 13, to the
anti-rewetting material layer 15 by chemical ways through
application of a bonding medium 72 in the form of an adhesive
72.
[0064] The material layer 11 influencing the liquid absorption
capacity is formed as a foamed layer with pores 12. In this case
the pores 12 have a defined size which is greater than the size of
the pores 9. The anti-rewetting material layer 15 is joined, at the
interface 16, to the material layer 11 influencing the liquid
absorption capacity by chemical ways through application of a
bonding medium 72 in the form of an adhesive 72.
[0065] The two material layers 4 and 11 influencing the liquid
absorption capacity are undetachably joined together,
two-dimensionally at the interface 14, by chemical ways in the form
of an adhesive bond 72.
[0066] The machine-side material layer 3 is undetachably joined,
two-dimensionally at the interface 8, to the material layer 4
influencing the liquid absorption capacity by chemical ways through
application of a bonding medium 72 in the form of an adhesive
72.
[0067] FIG. 3 shows in longitudinal section in the machine
direction sections of a dryer fabric 20 according to the invention.
The dryer fabric 20 is formed from the paper-side web-shaped
material 2 known from FIGS. 1 and 2 and from the machine-side
web-shaped material layer 3 known from FIGS. 1 and 2.
[0068] The two material layers 2 and 3 are undetachably joined
together, two-dimensionally at the interface 21, by chemical ways
in the form of an adhesive bond 72.
[0069] FIG. 4 shows a detail in longitudinal section in the machine
direction of the forming mesh 1 of the invention in the area of the
two end areas 30 and 31 of the forming mesh 1. In the situation
illustrated, the two end areas 30 and 31 are not yet brought fully
into contact with each other
[0070] As is evident from FIG. 4, the web-shaped material layers 2,
3 and 4 are mutually offset in machine direction and joined
together, two-dimensionally, in sections. As the result, the two
end areas complement each other in form and function and can be
joined together two-dimensionally.
[0071] FIGS. 5 to 7 show coverings which are produced from a
construction kit of prefabricated web-shaped material layers 41, 42
and 61.
[0072] FIG. 5 shows in cross section, meaning transverse to the
machine direction, sections of a forming mesh 40 according to the
invention. The forming mesh 40 has a paper-side web-shaped material
layer 41 through which the surface of the fibrous web formed on the
forming mesh is essentially influenced, and a machine-side
web-shaped material layer 42 through which the wear behavior of the
forming mesh 40 is essentially influenced. The machine-side
material layer 42 is thus a wear-stable material layer 42. In the
embodiment in question the paper-side 41 and machine-side material
layer 42 also have dimension-stabilizing properties.
[0073] The material layers 41 and 42 are formed in this embodiment
as textile areal structures in the form of weave structures 41 and
42.
[0074] The weave structure 41 is formed by the warp threads 45 and
the weft threads 44, whereby each weft thread 44 passes alternately
under and over a warp thread 45 in order to form a smooth weave
pattern, thus creating a smooth contact area for the paper
fibers.
[0075] The weave structure 42 is formed by the warp threads 46 and
the weft threads 47, whereby each weft thread 47 in a repeat unit
passes under two consecutive warp threads 46 and then over one warp
thread 46 in order to form a particularly wear-stable weave pattern
in which the highly tensioned warp threads are protected by the
weft threads 47 against wear.
[0076] In the embodiment in question the two weave structures 41
and 42 are joined together, two-dimensionally at the interfaces 48
and 19, by chemical ways through a bonding medium. Here the bonding
medium itself forms a foamed material layer 43, which is arranged
between the two joined weave structures 41 and 42. The foamed
material layer 43 has pores 50 with a defined size. This means that
the foamed material layer 43 has the function of joining together
the two weave structures 41 and 42 in addition to the function of
influencing the liquid absorption capacity.
[0077] FIG. 6 shows in cross section, meaning transverse to the
machine direction, sections of a press felt 60 according to the
invention. The press felt 60 has the machine-side weave structure
42 known from FIG. 5 and a fleece 61 with fibers 62.
[0078] The fleece 61 and the weave structure 42 are joined together
at the two interfaces 63 and 49 by the bonding medium 43 forming a
material layer 43. In the case of the press felt 60, the bonding
medium again has the function of joining together the weave
structure 42 and the fleece 61 as well as the function of
influencing the liquid absorption capacity of the press felt
60.
[0079] FIG. 7 shows in cross section, meaning transverse to the
machine direction, sections of a dryer fabric 70 according to the
invention. The dryer fabric 70 has the paper-side weave structure
41 known from FIG. 5 and the machine-side weave structure 42 known
from FIG. 5.
[0080] The two weave structures 41 and 42 are joined together,
two-dimensionally, by chemical ways through a bonding medium 71 in
the form of an adhesive 71.
[0081] While this invention has been described as having a
preferred design, the present invention can be further modified
within the spirit and scope of this disclosure. This application is
therefore intended to cover any variations, uses, or adaptations of
the invention using its general principles. Further, this
application is intended to cover such departures from the present
disclosure as come within known or customary practice in the art to
which this invention pertains and which fall within the limits of
the appended claims.
List of Reference Numerals:
[0082] 1 Forming mesh [0083] 2 Paper-side material layer [0084] 3
Machine-side material layer [0085] 4 Material layer defining the
liquid adsorption capacity [0086] 5 Holes (paper-side material
layer) [0087] 6 Holes (machine-side material layer) [0088] 7
Interface [0089] 8 Interface [0090] 9 Pores (material layer
defining the liquid adsorption capacity) [0091] 10 Press felt
[0092] 11 Material layer defining the liquid adsorption capacity
[0093] 12 Pores (material layer defining the liquid adsorption
capacity) [0094] 13 Interface [0095] 14 Interface [0096] 15
Anti-rewetting material layer [0097] 16 Interface [0098] 20 Dryer
fabric [0099] 21 Interface [0100] 30 End area [0101] 31 End area
[0102] 40 Forming mesh [0103] 41 Weave structure (paper-side
material layer) [0104] 42 Weave structure (machine-side material
layer) [0105] 43 Bonding medium (material layer defining the liquid
adsorption capacity) [0106] 44 Weft thread (weave structure) [0107]
45 Warp thread (weave structure) [0108] 46 Warp thread (weave
structure) [0109] 47 Weft thread (weave structure) [0110] 48
Interface [0111] 49 Interface [0112] 50 Pores (bonding medium)
[0113] 60 Press felt [0114] 61 Fleece [0115] 62 Fibers (fleece)
[0116] 63 Interface [0117] 70 Dryer fabric [0118] 71 Bonding medium
[0119] 72 Adhesive
* * * * *