Note: Descriptions are shown in the official language in which they were submitted.
CA 02581858 2007-03-26
Specification
Anti-forge material distributed anti-fibers having visual character
Technical area
This invention relates to an anti-fake material, such as anti-fake paper, or
anti-fake film, or
anti-fake package, especially an anti-fake material distributed with anti-fake
fiber, which has
visual characteristic that cannot be simulated by printing.
Background
The anti-fake paper made by adding colored ~'iber into paper bas a long
history of nearly one
hundred years, which has been used in many countries for producing paper money
up to now,
and also for manufacturing valuable securities, receipts, product's
specifications, printing
labels and etc; and fluorescent fiber has been specially uscd in manufacture
of almost all paper
monies. In short, there are two kinds of anti-fake fibers generally, one is
single fiber in one
color and other is single fiber with several colors. Chinese patent
CN02168121.0 [An
anti-fake fiber] revealed a single fiber with several colors of sections, that
is, there are at least
two colors along with its length direction. Othcr Chinese patent CN'02170092.4
[An anti-fake
fiber and an anti-fake paper made thereofj released a fiber with different
colors in its upper
and down surfaces, that is, the fiber's cross section is oval and there are
two surfaces, upper
and down, corresponding to the oval, there is obvious color difference between
two surfaces.
When such fiber is added into paper pulp to rnanufacture anti-fake paper, the
upper surface
and the down surface of the oval fiber will be parallel to the paper surface
under interaction
with the paper fiber. If the paper is thin or transparent and when one fiber
in the paper is
observed, its one color is on one surface of the paper and its other color is
on the other surface
of the paper. But shortcorning of the colored fiber mentioned above is that:
its visual effect can
be simulated by printing thin line, and if it is necessary to preciously
distinguish whether it is a
fiber or a printed thin line, the only way is to tear the paper or to pick it
out with a needle for
furtber observing. It is not only inconvenient, but also impossible for
valuable paper money,
securities and etc. because such method will destroy them. Therefore, such
anti-fake effect is
limited and a faker can almost easily get by under falsc pretenccs when
simulating by printing
i =
CA 02581858 2007-03-26
thin line.
Chinese patent CN02146589.4 [An anti-fake material and an anti-fake document
made thereofj
revealed an anti-fake fiber that is a filament having axial length and round
or about round
cross section, with its characteristics of that: the said filament has two or
more colors in its
cross section, and axial colored part for each of the said colors stretches
axially in spiral status.
If observing in any changing angle, common person cannot eye-visually find
changes of the
colored pattern on the fiber; therefore, it is almost a visual characteristic
of a flat pattern and
can be successfully simulated by precious printing method within eye-
distinguishable
accuracy.
Detailed descriotions of this invention
The objective of this invention is to offer an anti-fake material that has
anti-fake fiber
distributed on it, from which diffcrcnt color patterns can be observed by
changing the
observing angle to the fiber and of which its visual characteristics cannot be
simulatcd by
current printing technologies.
Another objective of this inventyon is to offer an anti-fake fiber. When its
special part surface
is presented on at least one surface of the anti-fake material, on the surface
the observer can
respectively and separately see different color patterns on this special part
from different
observing angles. Therefore, if it is used in anti-fake material, current
printing technology has
no way to simulate.
This invention also provides several anti-fake fibers, the surface of special
part of these
anti-fake fibers can naturally present on at least one surface of the anti-
fake material in the
process of the anti-fake material manufacture. This spccial part makes
observer respectively
and separately see the different color patterns on the special part from
different observing
angles on the surf.ace. Therefore, if it is used in anti-fake material,
current printing technology
has no way to simulate.
The first objective of this invention is realized by that: an anti-fake
material, on which
anti-fake fiber is distributed; part surface of the said anti-fake fiber is
presented on the surface
of the said anti-fake matcrial with characteristics of that: the said part
surface has its
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CA 02581858 2007-03-26
concave-convex shielding structure on it, on which there are at least two
color patterns A and
B distributed, the said at least two color patterns A and B on the said part
surface have obvious
visual difference, therefore on the anti-fake material's surface with presence
of the said part
surface, when observing the said part surfacc from different observing angles,
the color
patterns A and B can be seen respectively.
The at least two color patterns on the anti-fakc fiber distributed in the anti-
fake material
revealed in this invention include color pattcrns appeared under visible
light, UV-ray, JR-ray
and other invisible r.ays. For the color patterns appeared under visible
light, the anti-fake
material of this invention can perform the first-level anti-fake
identification, that is the public
anti-fake identification; for the color pattcrns appeared under LJV ray, IR-
ray and other
invisible rays, they can be judged by using special tools to perform the
second-level anti-fake
identification. Because very thin anti-fake fiber (generally, the diameter of
the fiber is smaller
than 100 m) is distributed in the anti-fake material in this invention, on
whicb the
concave-convex shielding structure is arranged, and the concave-convex
shielding structure is
located on the said part surface of the anti-fake fiber and this part surface
can be presented on
at least one surface of the anti-fake material, there is obvious visual
difference between the
said at least two color patterns on the said part surface, therefore, because
of the shielding of
the concave-convex structure, observer can respectivcly and separately see the
color patterr-s
on the part surface from different observing angles on the surface of the anti-
fake material, by
which the anti-fake effect can be realized. Because such visual difference is
caused by using
the concave-convex shielding structure to shield fcature of the pattems
distributed on the
part surface of the anti-fake fiber in the anti-fakc material, no matter how
precious they are,
printing technologies have no way to simulate such stereo structure, thus,
this invention can
efficiently prevent any simulation by printing technologies.
The visual difference is in diversity, which is produced by color patterns
being respectively
and separately seen due to the at least two color patterns on the anti-fake
fiber distributed in
the anti-fake material revealed in this invention being shielded by the
concave-convex
shielding structure, it could be that: there are at least two observing angles
a and b existed on
the anti-fake matcrial surface with presence of the said part surface, the
color pattern A can be
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CA 02581858 2007-03-26
seen if observing the said part surface of the anti-fake fiber from the
observing angle a but the
pattern B cannot be seen because it is shicldcd by the concave-convex
shielding structure on
the part surface of the anti-fake fiber, and the color pattern B can be seen
if observing the said
part surface of the anti-fake fiber from the observing angle b but the pattem
A cannot be seen
because it is shielded by the concave-convex structure on the part surface of
the anti-fake fiber;
it could also be a different visual effect formed by one color pattern
shielded incompletely but
other color pattern feature shielded completely; in addition it could be a
jumped visual
conversion along with fiber length direction caused by shielding. ln
embodiments, each of the
differences will be further explained in detail based on their figures.
The other objective of this invention is realized by that: an anti-fake fiber
inserted into the said
anti-fake material, which has a part surface able to be presented on one
surface of the said
anti-fake material, with characteristics of that: the said part surface has a
concave-convex
shielding structure on it, at least two color patterns A and B are distributed
on the part surface,
the color patteras A and B have obvious visual difference on the said part
surface to make
person respectively see the color patterns A and B if observing the said part
surface from
different observing angles on the anti-fake material with presence of the said
part surface.
Because of the concavc-convex shielding structure arranged on the anti-fake
fiber in this
invention and the concave-convex shielding structure arranged on the part
surface of the
anti-fake fiber able to be presented on one face of the anti-fake material,
and because of
shielding by the concave-convex shielding structure, observer can respectively
and separately
see this special part from different angles on the special surface-the color
patterns with
visual difference on the part surface. Thus, if it is used in anti-fake
material, such visual
difference caused by its stereo structure cannot be simulated by current
printing technologies.
In fact, the purpose of this invention to naturally present the spccial part
of the anti-fake fiber
on at least one surface of the anti-fake material is to control certain
surface of the anti-fake
fiber towards to visible surface of the anti-fake material. On the basis of
theoretical analysis
and practical experiment, the anti-fake fiber surface parallel to the maximum
projection of the
anti-fake fiber can naturally present on at least one surface of the anti-fake
material, there are
three ways to realize it: first method is to coat a flat transparent material
on the outside of the
anti-fake fiber, and simultaneously to arrange the said part surface of the
anti-fake fiber
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towards to the flat surface of the transparent material, in this way, the flat
surface of the flat
fiber can naturally be parallel to the visiblc surface of the anti-fake
material to make the
needed part surface present on the visible surface of the anti-fake material.
The sccond method
is to bend or crook the anti-fake fiber, simultaneously with certain
toughness, and to locate the
said part surface on the bended or crooked outside surface, in this way, the
anti-fake fiber can
be presented on the visible surface of the anti-fake material in its self-
bended or crooked status.
The third method is to make the cross section of whole or part length of the
anti-fake fiber into
flat shape, to locate the said part surface of the anti-fake fiber onto the
flat surface at the flat
cross section part or on the anti-fake fiber's surface having the same
direction as the flat
surface. For the fiber with its full length in flat cross section, the flat
surface can be towards to
the visible surface when naturally adding into the anti-fake material; for the
fiber with its part
length in flat cross section, the flat part can be towards to the visible
surface, its otber part with
the same direction eorresponded to the flat surface can naturally follow
towards to the visible
surface.
Drawing description:
Figure 1 Drawing of this invention's schematic structure;
Figure 2a-Figure 2b Drawings of color patter.ns A and B distributed along with
length
direction of the anti-fake fiber and in parallel arrangement in the anti-fake
fiber,
Figure 2a A plane drawing,
Figure 2b A cross section drawing.
Figure 3 Drawing of color patterns A and B distributed on the anti-fake fiber
in parallel
arrangement but in slope with length direction of the anti-fake fiber;
Figure4 Side-viewing drawing of color patterns A and B on the anti-fake flbcr
distributed
along with length direction of the and-fake fiber,
Figure 5a-Figure 5g Status drawing.s of color patterns A and 8 on the anti-
fake fiber
distributed radially, extended axially and at different positions in length
direction;
Figure 6a-Figure 6b Dcawings of single-triangle cross section of the anti-fake
fiber in the
CA 02581858 2007-03-26
anti-fake material, of which:
Figure 6a Cross section drawing;
Figure 6b Plane drawing.
Figure 7a-Figure 7c Drawings of double-linked triangle cross section of the
anti-fake fiber
in the anti-fake material, of which:
Figure 7a Cross section drawing;
Figure 7b and 7c Plane drawings.
Figure 8a-Figure 8b Drawings of single-quadrilateral cross section of the anti-
fake fiber in
the anti-fake material, of which:
Figure 8a Cross scction drawing;
Figure 8b Plane drawing.
Figure 9a-Figure 9c Drawings of three-linked quadrilateral cross section of
the anti-fake
fiber in the anti-fake material, of which:
Figure 9a Cross section drawing;
Figure 9b and 9c Plane drawings.
Figure lOa-Figure lOd Drawings of trapezoid cross section of the anti-fake
fiber in the
anti-fake material, of which:
Figure l0a and lOb Cross section drawings;
Figure 10c and 10d Plane drawings.
Figure l la-Figure l lf Drawings of the anti-fake coated with transparent
material in the
anti-fake material, of which:
Figure 11a and llb Drawings of single-triangle cross section and
single-quadrilateral cross section of the anti-fake fibers coated with round
transparent
material;
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CA 02581858 2007-03-26
Figure 11 e and lid Drawings of single-triangle cross section and
single-quadrilateral cross section of the anti-fake fibers coated with flat
transparent
material;
Figure 11 e and 11 f Drawings of multi-triangle cross section and multi-
quadrilateral
cross section of the anti-fake ftbers coated with flat transparent niaterial.
Figure 12a-Figure 12e Cross section drawings for an Al vacuum-coated shielding
layer
between color patterns A and B of the anti-fake fiber, of which:
Figure 12a Drawing of triangle cross section with Al-coated layer in the
middle of
the material;
Figure 12b Drawing of triangle cross section with Al-coated layer on the
material
surface;
Figure 12c Drawing of quadrilateral section with Al-coated layer in the
material;
Figure 12d Drawing of quadrilateral section with Al-coated layer on the
material
surface;
Figure 12e Drawing of multi-linked triangle section with Al-coated layer on
the
same visual surface of the material.
Figure 13 Cross section drawing of the anti-fake fibcr with curve side of the
cross section in
this invention;
Figure 14a, Figure 14b and Figure 14c Drawings for minimum square areas of the
anti-fake
fibers in different shapes;
Figure I5a and Figure 15b Drawing of the bended anti-fake fibers distributed
in the
anti-fake rnatcrial in this i vention;
Figure 15 Front-viewing drawing of partial section of the anti-fake fiber in
flat shape.
Embodiment
Figure 1 shows one enlarged anti-fake fiber 2 distributod in the anti,fake
material 1, the part
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surface 3 of the anti-fake 2 is presented on the surface 1' of the anti-fake
material, the part
surface 3 has its concave-convex shielding structure on it, in this Figure the
concave-convex
shielding structure is constituted of trianglc element contained in the cross
section 4 of the
anti-fake fiber 2, its top angle and its bevel side's surface of the triangle
element constitutes a
concave-convex shielding structure, surfaces 3' and 3" of these two bevel
sides constitute the
part surface 3, the color pattern A is distributed on the surface 3' and the
color pattcrn B on the
surface 3", if observing the part surface 3 from different observing angles on
the surface 1' of
the anti-fake material 1, it is possible to respectively and separatcly sec
the color patterns A
and B, for example, if observing from a, it is possible to see the color
pattern A, and from b to
see the color pattern B, because of the difference between the color patterns
A and B, an
obvious visual difference is resulted in. The color patterns A and B can be
respectively or
jointly distributed on the surfaces 3' and 3" fully to make more obvious
visual difference. If
observing the part surface 3 from different observing angles on the surface ]'
of the anti-fake
material 1, if observing the part surface 3 fi'om a to b in the direction
vertical to the anti-fake
fiber 2, there is at least an observing angle c locatcd between two color
patterns A and B, from
which either the color pattern A or the color pattern B can be seen, because
the anti-fake fiber
2 is very thin generally, therefore an pattern combined by the color patterns
A and B can be
seen generally from the observing angle c.
The at least two color patterns on the anti-fake fiber distributed in the anti-
fake material
revealed in this invention include color patterns being able to appear under
visible light,
UV ray, IR-ray and other invisible rays. For the color patterns appeared under
visible light, the
anti-fake material of this invention can perform the first-level anti-fake
identification, that is
the public anti-fake identification; for the color patterns appeared under UV-
ray, IR ray and
other invisible rays, they can be judged by using special tools to perform the
second-level
anti-fake identification. Because very thin anti-fake fiber Z(generally, the
diameter of the fiber
is smaller than 100 m) is distributed in the anti-fake material 1 in this
invention, on which the
concave-convex shielding structure is arranged, and the concave-convex
shielding structurc is
located on the said part surface 3 of the anti-fake fiber and this part
surface 3 can be presented
on at least one surface of the anti-fake rnaterial, therefore, because of the
shielding function of
the concavo-convex structure, observer can respectively and separately see the
different color
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patterns on the part surface from different observing angles on the surface of
the anti-fake
material with results of obvious visual difference, by which the anti-fake
effect can be realized.
Because such visual difference is caused by using the concave-convex structure
to shield the
feature of the patterns distributed on the part surface of the anti-fake fiber
in the anti-fake
material, that is, realization of the objectives mentioned above is depended
on shielding light
effect from different angles by the precious concave-convcx structure on the
fiber surface,
thus all of the current printing technologies (including printings such as
litho, perforating,
gravure, letterpress, jetting, copying and etc.) have no way to preciously
simulate such stereo
structure, thus, this invention can efficiently prevent any simulation by
printing technologies.
The visual difference of this invention is in diversity:
The at least two color patterns A and B of the anti-fake fibers distributed in
the anti-fake
material in this invention are shielded by the concave-convex stmctures and
are able to be
respectively seen to result in a visual difference that is in diversity, such
visual difference is
related with different visions caused by the color patterns differently
distributed on the part
surface of the anti-fake fibers with different concave-convex shielding
structures located on it.
The embodirnent shown in Figure I indicates a color pattern distribution that
can be
completely shielded by the concave-convex structure with each other, because
of the shielding
structure extended along with length direction of the anti-fake fiber 2, thus
only can the
different visions vertical to the length direction of the anti-fake fiber be
markedly changed
under shielding. Because the anti-fake fiber 2 is a very thin and fine, it is
recommended to
havc the maximum cross section diameter of the anti-fake fiber not over than
0.25 mm, thus
visible width of the anti-fake fiber, if observing vertically to the length
direction of the
anti-fake fiber 2, is very limited, so when converting from observing angle a
to observing
angle b, an obvious visual difference can be produced only if there is
difference between the
color patterns A and B, it is the only way for such difference possibly felt
by common person.
It is the merit of this embodiment to make normal eyesight fcel large change
only based on
difference between the color patterns A and B, preferably this difference is
only in different
colors, but also could be in the same color but in different patterns, and in
addition also could
be different both in color and pattern. In this embodiment, there are at least
two observing
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angIes a and b existed on the surface 1' of the anti-fake material 1, the
color pattern A can be
seen if observing the said part surface of the anti-fake fiber from the
observing angle a, but the
color pattern B cannot be seen because it is shielded by the concave-convex
triangle structure
on the part surface 3 of the anti-fake fiber 2; and the color pattern B can be
seen if observing
the said part surface 3 of the anti-fake fiber 2 from the observing angle b,
but the color pattern
A cannot bc seen because it is shielded by the concave-convex triangle
structure on the part
surface 3 of the anti-fake fiber 2; for the second-level anti-fake by using
tluorescent fiber, IR
fiber and etc., that is, observing by using tools, this embodirnent may
unnecessarily bc limited
by the difference between the color patterns A and B, for example, the color
pattcrns A and B
can be completely the same ones within normal eyesight scope but one of them
shall be treated
by certain invisible ray, in this way, the visual difference between them can
be seen by using
special tools able to distinguish this invisible ray, thus the anti-fake
effect can be realized. In
this embodiment, the concave-convex shielding structure is arranged on the
part surface 3 of
the anti-fake fiber 2 in a way to form a pattern completely separated between
the color patterns
A and 'B without any overlapping with each other, thus a vision effect of
shielding each other
is realized.
The obvious visual difference of the at least two patterns A and B on the part
surface 3 can
also have a different visual effect formed by one color pattcrn A unable to be
shielded
completely and other color pattern B able to be shielded completely, such
visual effect is often
resulted by incorporate relationship of the color patterns, for example, the
color pattern A is
completely or partly incorporated in the color pattern B, that is, if
observing the part surface 3
of the anti-fake fiber from observing angle a, the eyesight can only see the
color pattern A
because the coneave-convcx shielding structure on the part surface 3 of the
anti-fake fiber
shields the color pattcrn B completely; if observing the part surface 3 of the
anti-fake fiber
from observing angle b, the eyesight can see the color pattern B because of
the
concave-convex shiclding structure on the part surface 3 of the anti-fake
fiber, but the color
pattern A is completely or partly not shielded. The color patterns A and B for
forming such
visual difference must be different; at least the colors of their color
patterns are different in
order to produce strong visual difference.
It also could be a visual difference produced when they are all not shielded
completely, in this
CA 02581858 2007-03-26
case, the color patterns A and B could be two patterns with their some parts
nverlapped partly,
that is, if observing the part surface 3 of the anti-fake fiber from observing
angle a, the
eyesight can see that the color pattern A only shields a part of the color
pattem B because of
the concave-convex shiclding structure on the part surface 3 of the anti-fake
fiber; if observing
the part surface 3 of the anti-fake fiber from observing angle b, the cyesight
can see that the
color pattern A only shields a part of the color pattern B because of the
concave-convex
shielding structure on the part surface 3 of the anti-fake fiber. Therefore,
though the A and B
are not shielded completely, their relative parts have been shielded. Because
of human's
limited eyesight resoYution, the pattern in human's eyes could be a composed
pattern
incorporated a part of the color pattern B into the color pattern A, but not a
pattern simply
incorporated the color pattern B fully into the color pattern A or simply
incorporated the color
pattern A fully into the color pattern B. The patteros A and B for producing
obvious visual
difference shall be diflf'erent, at least with different color feature.
It could also be a visual difference produced by jumped visual conversion
along with length
direction of the anti-fake fiber caused by shielding, because human has its
longer eyesight
along with length direction of the anti-fake fiber (the best length of the
anti-fake fiber is not
more than 15 mm, which can give much longer eyesight in comparison with its
width of 0.2
mm), thus, when the at least two color patterns A and B are distributed at
different positions
along with the length direction of the anti-fake fiber (unlike that
distributed axially as shown
in the Figure 1), the jumped visual change can be produced, which will be
explained in detail
in the following embodiments. This visual change bas relative lower
requirements on the color
pattcrns, that is, the color patterns could be the same and the jumped visual
change can be
produced, provided there is obvious visual difFerence at the position along
with the lcngth
direction of the anti-fakc fiber.
The color pattern's diversity of this invention and its formed visual effects:
At least two color patterns A and B could be the patterns composed of various
single colored
or multi-colored lines. Because the anti-fake fiber in this invention is very
thin and fine, for
the more practical first-level anti-fake identification, the more simple and
direct it is, the more
valuable it will be, Because the color feature is the easiest one for human to
identify, so
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CA 02581858 2007-03-26
thereafter, two color patterns A and B in different colors will be explained
in details.
See Figure 1, the color pattern A and the color pattern B are colored line A
and colored line B
in parallel and with different color features, for example the colored line A
is in red and the
colored line B is in blue, if observing the part surface 3 of the anti-fake
fiber from observing
angle a, only can the red line be seen, but the bluc line cannot be seen
because it is shielded by
the concave-convex shielding structure on the part surface 3 of the anti-fake
fiber, thus the
common person feels that the fiber is in red; if obscrving the part surface 3
of the anti-fake
fiber from observing angle b, only can the red line be seen, but the blue line
cannot be seen
because it is shielded by thc concave-convex shielding structure on the part
surface 3 of the
anti-fake fiber, thus the common person feels that the fiber is in red; if
observing the part
surface 3 of the anti-fake fiber from observing angle c, both of the red line
and the blue line
can be simultaneously seen, because the colored lincs arc very close with each
other, the
common person can only feel a composed effect of the red line and the blue
line, that is, the
fiber is somewhat in black.
In the embodiment shown in Figure 1, the colored line A and the colored line B
with different
color features but in parallel are also parallel with the length direction of
the and-fake #iber. If
its observing angle is changed, the full fiber will change its color from red
to blue with unique
visual conversion effect. The converting angle from the angle a to the angle b
should
preferably be not more than 120 degree. In this visual feature design, the
most obvious color
change of the fiber happens when observing the fiber surface with changing
angle at the
position vertical to the length direction of the fiber.
Figure 2a and Figure 2b show the composed effect of Al, A2, A3 colors and the
composed
effect of B 1, B2, B3 colors respectively to make the pattern A and the
pattern B with different
color features and in parallel. The colors A1-A3 and the colors Bl-B3 are
respectively in strip
shape and vertical to the length direction of the anti-fake fiber. Tn this
visual feature design, the
most obvious color change of the fiber happens when observing the fiber
surface with
changing angle at the position along with the length direction of the fiber.
Figure 3 shows the composed Al, A2, A3 colors and the composed B1, B2, B3
colors
respectively to make the pattern A and the pattern B with different color
features and in
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parallel. The colors A1-A3 and the colors Bl-B3 are respevtively in strip
shape and with a
cross angle of 0-90 to the length direction of the anti-fake fiber. In this
visual feature design,
the most obvious color change of the fiber happens when the observing position
is first in
slope with the length direction of the fiber, and then the observing angle is
changed to observe
the fiber's surface.
The color pattern A and the color pattem B are the same in their patterns and
also color
features, but the color pattern A and the color pattern B have their different
positions on the
length direction of the anti-fake fiber, see Figure 4. For example, the color
pattern A and the
color pattern B are all in black, the color pattern A is located in front part
of the fiber and is
composed of A1, A2, A3 colors and the color pattern B is located in rear part
of the fiber and is
composed of B 1, B2, B3 colors, when changing the observing angle, the full
fiber happens it.s
position move in jumped style with unique visual conversion effect.
Figure 5a-Figure 5g show the situations of the color pattern A and the color
pattern B
distributed radially, extended axially but having different positions in the
length direction of
the fiber. The color pattern A and the color pattern B could be have their
positions, fully
overlapped, or partly overlapped, or partly lined, or separated with each
other, in the length
direction of the anti-fake fiber, Figure 5a: the color pattem A in strip shape
is red in color and
the color pattern B in strip shape is black in color, if the positions of the
color pattem A and the
color pattern B are fully overlapped axially, when changing angle to observe,
the full fiber
changes color from red to black, the fiber's position does not move visually,
having unique
visual conversion effect; Figure 5b: if the positions of the color pattern A
and the color pattern
B arc partly overlapped axially, when changing angle to observe, visually the
full fiber
changes color from red to black and happens jumped position move, but the
jumping is small,
having unique visual conversion effect; Figure 5c: if the axial positions of
the color pattem A
and the color pattern B are linked, when changing angle to observe, visually
the fall fiber
changes color from red to black and happens jumped position move, but the
jumping is in
form of head linked to tail; Figure 5d: if the axial positions of the color
pattern A and the color
pattern B are separated, when changing angle to observe, visually the full
fiber changes color
from red to black and happens jumped position move, but the jumping is in
leaping style,
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having unique visual conversion effect.
Figure 5e shows the situation of the color pattern A and the color pattern B
composed of
different colors, its color could be a single-color, or a composition of multi-
colors. For
example, the color pattern A in strip shape is composed of two lines in
different colors with
head linked to tail, one line is red Al and other line is green A2; the color
pattern B is a black
line, when changing anglc to observe, visually the full fiber changes its
color from
double-color of red/green to single color of black, having unique visual
conversion effect.
The color of the color pattern could be white, or blank, or the same color as
that on the surface
of the anti-fake fiber. In Figure 5f, if the color pattern A in strip shape is
red, and the color
pattem B in strip is white and is distributed on the full convex surface 3" of
the anti-fake fiber,
if the surface of the anti-fake material is in white, when changing angle to
observe, the whole
fiber changes from red to invisible status, having unique visual conversion
effect. Tf the color
pattern A in strip shape is black, and the color pattern B in strip is yellow
and is distributed on
the full convex surface 3" of the anti-fake fiber, if the surface of the anti-
fake material is in
yellow, when changing angle to observe, the whole fiber changes from black to
invisible status,
having unique visual conversion effect. Therefore, if the color of the color
pattern B is in the
same color as that on the surface of the anti-fake material, the cross section
of the fiber can be
designed to part or full color pattern B incorporated into the color pattem A
visually, but the
color pattern A cannot be incorporated into the color pattcrn B, see Figure
5g.
In this uivention, the concave-convex shielding structure is in diversity:
The concave-convex shielding structure is composed of a cross section of the
anti-fake fiber,
having at least one triangle element, the triangle element refers to a cross
section structure
with at least one top angle and two sides corresponded to it, its typical
structure is a triangle
section, but also can be a quadrilateral section or polygon's section. The
cross section in
Figure I is a triangle, the color pattern A is located on face 3' related to
one bevel side of the
triangle and the color pattern B is located on face 3" related to another
bevel side of the
triangle. The triangle is a typical concave-convex shielding structure to
realize one color
pattern presented and other color pattern shielded, and is also easy to meet
the requirement of
converting angle preferably not over than 120 when converting observation
from the angle a
14
CA 02581858 2007-03-26
to the angle b.
The concave-convex shielding structure is composed of multi-triangles in
parallel, the
composition of all the color patterns on the relative bevel side of each
triangle constitutes the
color pattern A and the composition of all the color patterns on the another
relative bevel side
of each triangle constitutes the color pattern B. Because the fiber is very
thin and fine, the
concave-convex shielding stnicture made of single triangle is difficult to
present on the
surface of the anti-fake material just in a form of its top angle upwards, for
this reason the
triangle has to be made in flat form, but for such filat triangle, its
sensitivity of the color pattern
convcrsion is lower when changing its observing angle, and the color pattern A
or the color
pattcrn B is very thin and fine when the fiber is in certain width, which
influences the visual
effect. Therefore, the parallel-triangle composition design in this invention
can overcome the
above shortcoming.
Figure 6a-Figure 6b are the drawings for the anti-fake fiber 2 with. single-
triangle cross
section in the anti-fake material 1, of which Figure 6a is a cross section
drawing and Figure 6b
is a plane drawing. There is the color pattern A and the color pattern B on a
slope relative to
two sides of the triangle, because of the anti-fake material with certain
transparency, the color
pattern A and the color pattern B presented on the surface of the anti-fake
material is visible
for eyes, when observing from angle a the color pattern A can be seen but the
color pattern B
cannot because it is shielded by the convex structure of the triangle, it is
the same when
observing from angle b the color pattern B can be seen but the color pattern A
cannot because
it is shielded by the convex structure of the ttiangle, In addition, the anti-
fake fiber 2 in the
anti-fake material 1 is bended along with a equally-dividing axis between the
said two sides,
which ensures that: either both of surface A and surface B are presented
simultaneously on the
surface of the anti-fake material, or the surface corresponded to third side 6
is presented alone
on the surface of the anti-fake material. Here, to bend along with the equally-
dividing axis 5 is
the key matter for accurately controlling the surface of the fiber with A and
B on it
simultaneously upwards, in fact the equally-dividing axis is a virtual
controlling axis that
plays the same role in the all of the following drawings as that in Figure 6
series, its objective
is to present the color pattern A and the color pattern B simultaneously on
the surface of the
ant-fake material I. The color of the surface corresponded to the third side 6
of the cross
CA 02581858 2007-03-26
section is in white or the same as that on the surface of the anti-fake
material 1. Main reasons
for selecting this triangle structure are based on three aspects as follows:
1. Generally speaking, when the width of a colored line is less than 30 m, it
is hard for eyes
to observe, but a triangle structure with the same fiber height has its
feature of larger colored
area visible by eyes, when the thickness of paper or plastic film is thinner,
it is impossible for
fiber's heigktt to be larger than thickness of paper or plastic film,
generally the thiclatess of
money paper is not over than 90 m and the thickness of copy paper is not over
than 80 m,
thus if fiber is necessary to be added into the paper in such thickness, the
one with triangle
structure is the best choice; 2. In comparison with quadrilateral cross
section, the triangle
cross section has better stability and can ensure the color patterns A and B
homogeneously
presented on the surface of the anti-fake material under certain forming press
in the proccss of
paper making; 3. One feature of the triangle structure is that the color
pattcrn on the surface
corresponded to side 6 can also potentially present on the surface of the anti-
fake material
alone, because of no concave-convex structure on this flat surface, it is
impossible to produce
the visual difference caused by changing observing angle, thus for avoiding
such situation, we
prepare the color pattern on this surface in white or in the same color as
that of the surface of
the anti-fake material, thus wben this color pattern is presented on the
surface of the anti-fake
material, this problem can be solved because of the presented fiber's surface
in white or in the
same color as that of the surface of the anti-fake material, which is
invisible for eyes.
Figure 7a-Figure 7c are the drawings for the anti-fake fiber with double-
linked triangle cross
section in the antY-fakc material, of which Figure 7a is a cross section
drawing, and Figure 7b
and Figure 7c arc their plane drawings. Because the anti-fake material has
certain transparency,
the triangle color pattern A and the triangle color pattern B presented on the
surface of the
anti-fake material are visible by eyes, when observing from angle a, the color
pattern A (as a
composed visual effect of AI+A2) can be seen but the color pattem B cannot be
seen because
it is shielded by the triangle; vice versa, when obscrving from angle b, the
color pattern B (as a
composed visual effect of B1+82) can be seen but the color pattern A cannot be
seen because
it is shielded by the triangle, In addition, the fiber in the anti-fake
material can be bended
along with the equally-dividing axis S(see Figure 3b) and can also be in a
straight line (see
16
CA 02581858 2007-03-26
Figure 3c), thus it can ensure that: either the surface with the color pattern
A located on it and
the surface with the color pattern B located on it are simultaneously
presented on the surface
of the anti-fake material 1, or the surface corresponded to the side 6 is
presented on the surfacc
of the anti-fake material I alone. We prepare the color pattern on the surface
corresponded to
the side 6 in white or in the same color as that of the surface of the anti-
fake material 1. The
actual effects of the structure are: 1. In comparison to singlo-triangle,
there is larger visual area
when their fiber heights are the same, thus it is possible to be used into a
very thin paper, for
example the paper's thickness is less than 50 .m; 2. Because of the fiber in
flat form totally,
when the fiber is shorter in its tength with certain hardness, the fiber even
if unnecessary to be
bended can also ensure that: either the surfaces with the color patterns A and
B located on
them present on the surface of the anti-fake material 1 simultaneously, or the
surface
corresponded to the side 6 presents on the surface of the anti-fake material
1.
Figure 8a-Figure 8b are the drawings for the anti-fake fiber 2 with single-
quadrilateral cross
section in the anti-fake material 1, of which Figure Sa is a cross section
drawing and Figure 8b
is a plane drawing. In comparison with single-triangle shown in Figure 6
series, the anti-fake
fiber 2 is bended along with the equally-dividing axis 5, its visual area in
the anti-fake material
1 is reduced by one half if the fiber's height is the same, but its merit is
that; either which
surface (either the surface with the color patterns A and B located on, or the
surface with the
color patterns A' and B' located on) is upwards, the fiber can all show color-
change effect if
the visual angle is changcd. It is one of the selections for the paper or film
with largcr
thickness.
Figure 9a--Figure 9c are the drawings for the anti-fake fiber 2 with three-
linked quadrilateral
cross section in the anti-fake material 1, of which Figure 9a is a cross
section drawing, and
Figure 9b and Figure 9c are their plane drawings. In comparison to single-
yuadrilateral shown
in Figure 8 series, it has larger visual area if their fiber heights are the
same. Because of the
fiber in flat form totally, when the fiber is shorter in its length with
certain hardness, the fiber
even if unnecessary to be bended can also ensure that the color pattern A
(composed of Al, A2
and A3) and the color pattern B (composed of B 1, 82 and B3) present on the
surface of the
anti-fake material simultancously.
17
CA 02581858 2007-03-26
Figure 10a--Figure 10d are the drawings for the anti-fake fiber with trapezoid
cross section in
the anti-fake material, of which Figure 10a and lOb are their cross section
drawings, and
FigurclOc and Figure 10e are their plane dr.awings. The trapezoid has better
st,ability, even
though the surfaces with the color patterns A and B located on arc in very
sloped status (the
more inclined it is, the much higher sensitivity will be), it is still very
stable, especially when
the fiber is shorter in its length with certain hardness, the fiber even if
unnecessary to be
bended can also ensure that the color pattern A and the color pattem B present
on the surface
of the anti-fake material simultaneously (see Figure l0c), Figure l0a shows a
trapezoid, in
comparison with two-trapezoid composition shown in Figure lOb, its merit is
that the fiber's
height in the paper is much smaller, in Figure 1 pa the color of the surface
corresponded to the
side 6 is in white or in the same color as that of the surface of the anti-
fake material 1; but
compared with Figure 10s, the arrangement shown in Figure l Ob can produce
color-changing
effect regardless of which surface upwards and when changing its observing
angle, so it is an
alternation for paper or film with larger thickness; the surface corresponded
to bottom side 6
of the trapezoid shown in Figure l0a is in white or in the samc color as that
on the surface of
the anti-fake material 1.
Figure 11 a-Figure 11 f are the drawings for the anti-fake fiber coated with
transparent
material 7 in the anti-fakc material 1, Because of the transparency of
transparent material 7,
the part surface 3 with the concave-convex shielding structure on the anti-
fake fiber in this
invention naturally presents on the surface of the anti-fake material. Figure
1 l a and Figure 11 b
show that the fibers respectively with their cross sections of single-triangle
or
single-quadrilateral are coated with the round transparent material 7, the
purpose is to increase
the fiber's compressive strength to further ensure the stability of the
fiber's cross section
shapes in the process of paper making or in the process of adding plastics;
Figure llc and
Figure lld show that the flbcrs respectively with their cross sections of
single-triangle or
single-quadrilateral are coated with the flat transparent material 7, the
purposes are not only to
increase its compressive strength to further ensure the stability of the
fiber's cross section
shapes in the process of paper making or in the process of adding plastics,
but also to ensure
the A and B surfaces, even if the fiber is not bended, presentecl
simaltaneously on the surface
of the anty-fake material; Figure 11 e and Figure 1 lf show that the fibers
respectively with their
18
CA 02581858 2007-03-26
cross sections of multi-triangle or multi-quadr.ilatcral arc coated with the
flat transparent
rnaterial 7, the purpose is to increase fiber's compressive strength to
further ensure the
stability of thc fiber's cross section shapes in the process of paper making
or in the process of
adding plastics.
Figure 12a-Figure 12c are the cross section drawings for the vacuum-coatcd
aluminum layer
with shielding function between the color pattcrn A and the color pattem B on
the anti-fake
fiber 2. We found in our practices that: because of the fiber in very small
size, when using
organic material to prepare the fiber, the colors interfere with each other
between the color
patterns A and B, resulting in seriously-influenced beauty of the color
patteras A and B, and
reduced visual difference between the color patterns A and B. For solving this
problem, we
design an Al-coated layer 8 between the color patterns A and B, because Al-
coating is not only
at low cost, but also has completely-shielding function when the Al-coated
layer is only 0.2
m in its thickness. Figure 12a is a drawing of the fiber with its triangle
cross section and an
Al-coated layer 8 located in the middle position on the material, which is
equal to a
composition made of two fibers in different colors, the interface of this
composition is coated
by aluminum; Figure '12b is a drawing of the fiber with its triangle cross
section and an
Al-coated layer $ located on the fiber's surface, after coating aluminum the
fiber's surface can
also be adhered with a layer of color or is only kept with this aluminurn
layer; Figure 12c is a
drawing of the fiber with its quadrilateral cross section and an Al-coated
layer 8 located in the
middle position on the material, the interface between two different colors on
this composition
is coated by aluminum; Figure 12d is a drawing of the fiber with its
quadrilateral cross section
and an Al-coated layer 8 located on the fiber's surface, the Al-coated layer 8
is located on one
side of the axis 5 on the surface, after coating aluminum the fiber's surface
can also be
adhered with a layer of color or is only kept with this aluminum layer; Figure
8c is a drawing
of the fiber with its multy-linked triangle cross section and the Al-coated
layer 8 located on the
surfaces B 1, B2, B3 of the triangles with the same vision on the anti-fake
fiber. In addition, the
surface of whole anti-fakc fiber can be coated with aluminum first, and then
the color patterns
A and B are printed on the relative surfaces.
The said concave-convex shielding structure can be in arc shape, see Figure
13, and also can
19
CA 02581858 2007-03-26
be in saw teeth shape or other irregular curve shapes.
In the above embodiments, the anti-fake materials are the organic films.
Previously, no one
has added the anti-fake fiber into the plastic films for anti-fake functions,
the reason for it is
that the plastic films are difficult to tear and easy to melt with the anti-
fake fibers, thus there is
difficult to tear the plastic film or to pick the anti-fake fiber out for
checking the anti-fake fiber.
When the faker simulates the visual features via printing fine line, there is
no simple way to
verify. Because it is unrtecessary to tear the plastic films for observing in
this invention, it can
be used in plastic film areas.
In the above embodiments, the anti-fake fiber is a fluorescent fiber, when
illuminating via
fluorescent lamp and changing observing angle, there will be obvious visible
visual
difference.
In the above embodiments, the anti-fake fiber is an fR fiber, when
illuminating via IR-ray and
changing observing angle, there will he obviou.s visible visual difference.
The way for controlling the part surface 3 of the anti-fake fiber presented on
the surface of the
anti-fake material is as follows:
For realizing the objectives of this invention, the most important technique
is to control
efficient concave-convex shielding structure of the fiber being really
presented on the surface
of the anti-fake material in the practical production process. Theoretical
analysis and a large
amoiuit of experinients indicate that: in the paper rnaking process, when the
fiber has certain
elastic hardness, the maximum projection area of the whole fiber shape will
certainly present
on the surface of the paper. In this invention, the projection area of the
anti-fake fiber refers to
the minimum square area corresponded to the projective line of the substance,
that is, when
the anti-fake fiber is in straight line and the fiber's crass section is
equivalent in the length
direction, the minimum square area is the area of the projactivc lines of the
substance, see the
area covered by bevel lines in Figure 14a; when the anti-fake fiber is in
straight line and the
fiber's cross section is not equivalent in the length direction, the minimum
square area is the
product area of the maximum width of the projective area of the anti-fake
fiber substance and
the length of the anti-fake fiber, see the area covered by bevel lines in
Figure 14b; when the
CA 02581858 2007-03-26
anti-fake fiber is in curve, the minimum square area is just the square area
constituted of and
covered by the projective lines of the bcnded substance of the anti-fake
fiber, see the area
covered by bevel lines in Figure 14c.
Another dcscription has the same effects as that mentioned above, when to
envelop the
anti-fake fiber 2 by a cube can fully wrap the part surface 3 of the anti-fake
fiber, which is
corresponded by two maximum surfaces in minimum cube of the anti-fake fiber,
the two
maximum surfaces of the minimum cube are certainly towards to the surface of
the anti-fake
material because of their lowest energy status, therefore, the part surface 3
with the
concave-convex shielding structure on it can present on the surface of the
anti-fake material.
Accordingly, this invention designs especially as follows, these designs are
also applicable to
distribute the anti-fake fiber into a sandwich with a paper in it, or
distribute it into a sandwich
with a plastic film in it, or distribute it into a single-layer plastic filni.
The anti-fake fiber 2 is in curve shape, the upward surface of the bended
fiber is the part
surface 3 of the anti-fake fiber, see Figure 15a and Figure I5b. The maximum
width c of the
cross section of the anti-fake fiber, in its length direction and being
parallel to the surface of
the anti-fake material, is equal to or less than the maximum width d of the
cross section being
vertical to the surface of the anti-fake material, that is, the long axis d of
the cross section in
the length direction of the anti-fake fiber 2 is vertical to the surface of
the anti-fake material,
sce Figure 15b, thus when the fiber is in bended status, its cross section,
even if not in flat
shape, can still expose the necessary part surface 3 of the anti-fake fiber
onto the paper's
surface. The maximum horizontally-surmounted length formed by the bended anti-
fake fiber 2
is a geometrical width c, see Figure 15a, when this geometrical width is at
least over twice of
the long axis d of the cross section in the length direction of the anti-fake
fiber, the bended
anti-fake fiber 2 can completely present on the surface of the anti-fake
material in its
naturally-bended status.
If the cross section of the anti-fake fiber 2 has at lease its some part 9 in
flat shape in the fiber
length directi.on, the flat surface corresponded to the :flat shape will
present on the surface of
the anti-fake material, see Figure 16. The cross section of the anti-fake
fiber 2 in its length
direction can also be fully in flat shape, thus the flat surface corresponded
to this flat shape
21
CA 02581858 2007-03-26
will present on the surface of the anti-fake rnaterial. The color of the flat
part of the anti-fake
fiber 2 is preferably blank or white in color, or the saine color as that on
the surface of the
anti-fake material 1.
The materials of the anti-fake fiber in this invention can be organic or metal
ones.
The anti-fake material in this invention refers to paper, or paper-board, or
organic film. The
anti-fake fiber 2 can be sandwiched between two pulp layers, or between two
organic films; or
between pulp layer and other material layer; or between organic film layer and
other matcrial
layer; or can be adhered onto the surface of an anti-fake material, or can be
inserted into the
surface of the anti-fake rnaterial in other ways.
Various concave-convex structures of the anti-fake fibers in this invention
can be formed via
dies. The color patterns on the concave-convex structures can be prepared onto
the anti-fake
fibers by processes of adhering film, fine-printing, heat-pressing and etc.;
for the color pattern
with pure colors, it can be prepared first by jetting and then synthesizing,
and also can be
composed by heat pressing fibers in different colors.
The anti-fake fiber can be inserted into paper by directly adding it into pulp
in the process of
papermaking, and can also be done by pressing it into multi-layers of paper.
22
