Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Release layer
Reexamination Certificate
2001-08-29
2004-06-22
Resan, Stevan A. (Department: 1773)
Stock material or miscellaneous articles
Layer or component removable to expose adhesive
Release layer
C428S323000, C428S324000, C428S325000, C428S328000, C428S336000, C428S343000, C428S354000, C428S403000, C428S426000, C428S542200
Reexamination Certificate
active
06753056
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a decorative film for glass-paned window and, more particularly, to a decorative film for glass-paned window, which is particularly superior in privacy protection, light screening property and decorative effect. The decorative film of the present invention can exert the excellent effect when applying to transparent glass-paned windows of structures such as house and building, and transparent glass-paned windows of vehicles such as car and train.
BACKGROUND
For the purpose of protecting privacy and screening light, it has widely been performed to coat a transparent glass-paned window with a special polarizing film through which the-situation inside the room or vehicle can not be observed easily, heretofore. The polarizing film to be applied to the glass-paned window includes, for example, film obtained by coating a transparent substrate such as polyester film and polyolefin film with ink containing powders of a metal such as aluminum, titanium and nickel; metallic film obtained by laminating a metal such as aluminum, titanium and nickel on a substrate such as polyolefin film; and film obtained by coating a substrate with ink having high screening property. Regarding such a polarizing film, when the scene inside is observed from the outside through the glass-paned window to which the polarizing film is applied, the glass-paned window of a gray or similar halftone color can be seen, merely, but the situation inside can not be observed. This is because only a brightness of the outside of the glass-paned window is reflected by a polarizing function of the film. Inside of the glass-paned window, the outside scene can be seen similar to the case where the polarizing film is not used, and the view is not obstructed.
The polarizing film of the prior art is useful for protecting privacy and screening light, as described above. However, as explained previously, the color observed from the outside, when using prior polarizing film, is black or gray, or a similar halftone color. Therefore, still some room for improvement in appearance is left.
Although its purpose is not directed to improve the appearance of the polarizing film itself, Japanese Unexamined Patent Publication (Kokai) No. 3-69397 discloses a decorative screen capable of performing different displays at both sides of a transparent door, a window and a partition in the room without obstructing see-through and light screening properties. As schematically shown in
FIG. 1
, this decorative screen has such a construction that a printing layer
24
having a lot of through-holes
25
is provided on a substrate
20
made of a transparent plastic or glass and the printing layer
24
has respectively a surface pattern layer
21
and a back surface pattern layer
23
via a screen ink layer
22
interposed between both pattern layers. This decorative screen can be produced by making a transfer sheet having the printing layer
24
, forming a lot of through-holes
25
, and transferring the transfer sheet on one surface of a substrate. For example, when this decorative sheet is applied to the glass-paned window, it is possible to see the opposite side through a lot of through-pores
25
formed on the printing layer
24
from any side, and to see a different pattern from each side. Therefore, it can be used for the purpose of advertising and decorating. However, in case of this decorative screen, it is necessary to make a transfer sheet as its precursor and, therefore, the production becomes complicated and an increase in cost is not avoided. Furthermore, the printed pattern is unattractive because it depends on a normal printed technique, and a fine pattern can not be printed.
Furthermore, Japanese Utility Model Registration No. 3041191 discloses a removable sheet-like advertising display capable of displaying advertising contents at the window portion of the side of transfer vehicles bodies such as car and train without obstructing the view. As shown in
FIG. 2
, since an advertising display
31
is applied to the portion including a portion of a window
35
of the side of a transfer vehicle body via an adhesive portion
34
, the advertising display has through-holes
32
penetrating the sheet on the whole surface and, at the same time, an advertising display portion (a portion of the English letter is shown in the drawing)
33
is provided on the surface. The through-holes
32
are provided with enough size and distance so that the pattern of the advertising display portion
33
can be clearly confirmed from the outside of the vehicle body and, at the same time, the-scene of the outside can be seen from the interior of the vehicle body to some extent. However, in case of this advertising display, since a main portion of the sheet is occupied by the through-holes, the amount of an adhesive to be applied to the adhesive portion of the back surface becomes small and a sufficiently strong adhesive force can not be obtained. Furthermore, there is also a problem that, while the advertising display is applied to the glass-paned window, dust accumulates on the portion of the through-holes and the portion of the adhesive squeezed out by a pressing force at the time of applying the sheet, thereby to lower the adhesive force and durability. Although it is not disclosed in the specification, it is understood that the advertising display is produced by using the transfer method and perforating method in combination, similar to the decorative screen described previously with reference to FIG.
1
. Accordingly, the production becomes complicated and there is a fear of causing such additional problems that an increase in cost is not avoided an a fine pattern can not be printed.
SUMMARY OF THE INVENTION
An object of the present invention is to solve one or more of the above problems of a decorative film for glass-paned windows of the prior art.
An additional object of the present invention is to provide a decorative film for glass-paned windows that is superior in at least one of its privacy protection, light screening property and decorative effect.
Another object of the present invention is to provide a decorative film for glass-paned windows that can be easily produced, has a sufficient adhesive force to the glass-paned window, and/or affords an attractive fine decorative pattern.
In accordance with one aspect of the present invention, a decorative film is provided that comprises a transparent substrate and a colored layer, where the colored layer comprises ink containing an optical coherent pigment. The colored layer is provided on one surface of the substrate.
According to one preferred embodiment, the decorative film of the present invention comprises a transparent substrate as well as a colored layer and a clear layer, which are laminated, in order, on one surface of the transparent substrate. An adhesive layer is provided on the surface of the substrate opposite the colored layer. The adhesive layer can be colored, but does not have to be, and the surface of the adhesive is preferably protected with a release liner such as release paper.
The decorative film of the present invention may also be used in the form of a modification of the above construction, according to the use and other factors. The decorative film of the present invention may have the other additional layer, in addition to the substrate and colored layer which are essential to the construction, and adhesive layer and clear layer which are preferably used. The respective layers may usually be used in the form of a single-layer, but may also be used as a multi-layer of two or more layers, if desired.
In the practice of the present invention, the transparent substrate is not specifically limited as long as it has enough of a self-supporting property to support the colored layer, but is preferably a plastic film. Suitable plastic film includes, for example, polyester film, polyethylene film, polycarbonate film, vinyl chloride film, acrylic film, polyurethane film, polyolefin film and vinylidene fluoride film, but is not limited t
3M Innovative Properties Company
Knecht III Harold C.
Lown Jean A.
Resan Stevan A.
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