U.S. patent application number 11/353522 was filed with the patent office on 2006-08-24 for multilayer toilet paper.
Invention is credited to Giovanni Gambini.
Application Number | 20060185804 11/353522 |
Document ID | / |
Family ID | 36579559 |
Filed Date | 2006-08-24 |
United States Patent
Application |
20060185804 |
Kind Code |
A1 |
Gambini; Giovanni |
August 24, 2006 |
Multilayer toilet paper
Abstract
Multilayer toilet paper (10) comprising a first outer layer (20)
a second inner layer (30) and at least one middle layer (40)
in-between, wherein the at least one middle layer (40) is a waved
layer.
Inventors: |
Gambini; Giovanni; (Pisa,
IT) |
Correspondence
Address: |
HEDMAN & COSTIGAN P.C.
1185 AVENUE OF THE AMERICAS
NEW YORK
NY
10036
US
|
Family ID: |
36579559 |
Appl. No.: |
11/353522 |
Filed: |
February 13, 2006 |
Current U.S.
Class: |
162/125 ;
162/117 |
Current CPC
Class: |
D21H 27/002 20130101;
D21H 27/40 20130101; D21H 27/02 20130101 |
Class at
Publication: |
162/125 ;
162/117 |
International
Class: |
D21F 11/00 20060101
D21F011/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 21, 2005 |
IT |
MI2005A 000258 |
Claims
1. Multilayer toilet paper (10) comprising a first outer layer
(20), a second inner layer (30) and at least one middle layer (40)
in-between characterized in that said at least one middle layer
(40) is a waved layer.
2. Multilayer toilet paper (10) according to claim 1, characterized
in that said at least one middle layer (40) is waved along a
preferred direction.
3. Multilayer toilet paper (10) according to claim 1, characterized
in that said at least one middle layer (40) has an uniform waved
section.
4. Multilayer toilet paper (10) according to claim 1, characterized
in that said at least one middle layer (40) has in section a cyclic
wave trend substantially sinusoidal or cosinusoidal or square or
triangular or trapezoidal or a subsequent combination of them.
5. Multilayer toilet paper (10) according to claim 2, characterized
in that said at least one middle layer (40) has a waved section
along a preferred direction correspondent with a longitudinal
direction (50).
6. Multilayer toilet paper (10) according to claim 3, characterized
in that said at least one middle layer (40) has a waved section
along a preferred direction correspondent with a longitudinal
direction (50).
7. Multilayer toilet paper (10) according to claim 4, characterized
in that said at least one middle layer (40) has a waved section
along a preferred direction correspondent with a longitudinal
direction (50).
8. Multilayer toilet paper (10) according to claim 2, characterized
in that said at least one middle layer (40) has a waviness that
develops along a leaning direction with respect to a longitudinal
direction (50).
9. Multilayer toilet paper (10) according to claim 3, characterized
in that said at least one middle layer (40) has a waviness that
develops along a leaning direction with respect to a longitudinal
direction (50).
10. Multilayer toilet paper (10) according to claim 4,
characterized in that said at least one middle layer (40) has a
waviness that develops along a leaning direction with respect to a
longitudinal direction (50).
11. Multilayer toilet paper (10) according to claim 1 characterized
in that said at least one first outer layer (20) and/or said second
inner layer (30) have a smooth surface.
12. Multilayer toilet paper (10) according to claim 1 characterized
in that said first outer layer (20) and/or said second inner layer
(30) have an embossed surface comprising a plurality of projections
(21,22).
13. Multilayer toilet paper (10) according to claim 12,
characterized in that said embossed surface has at least 20
projections/cm.sup.2.
14. Multilayer toilet paper (10) according to claim 12,
characterized in that said embossed surface comprises a plurality
of base projections (21) or of different shape and or broader size
(22).
15. Multilayer toilet paper (10) according to claim 13,
characterized in that said embossed surface comprises a plurality
of base projections (21) or of different shape and or broader size
(22).
Description
[0001] The present invention refers to a multilayer toilet paper
which can be used as toilet paper and/or as a paper for household
use.
[0002] The present invention refers in particular to a toilet paper
with three or more plies combined together to obtain a multilayer
toilet paper.
[0003] Recently, it is even more required to have even softer and
more tender toilet papers and, at the same time, provided with
enough mechanical strength.
[0004] In recent times, there are methods for realizing multilayer
toilet papers through hot-air drying means which however have the
disadvantage of a high cost of production.
[0005] An objective of the present invention is to realize a
multilayer toilet paper with a high softness and a good mechanical
resistance.
[0006] Another objective of the present invention is that of
realizing a low-cost multilayer toilet paper.
[0007] A further objective of the present invention is to realize a
multilayer toilet paper with a high softness and good mechanical
strength and at the same time low-cost.
[0008] The above objectives are achieved, according to the present
invention, realizing a multilayer toilet paper as disclosed in
claim 1.
[0009] Further characteristics of the invention are clearly shown
in the successive claims.
[0010] The characteristics and the advantages of a multilayer
toilet paper, according to the present invention, will appear more
evident from the following illustrative and non-limiting
description referring to the schematic drawings, in which:
[0011] FIGS. 1a-1d are schematic views of a multilayer paper
according to a first embodiment of the invention in which FIG. 1a
is a longitudinal section of a three-plies product and FIGS. 1b-1d
are plan views from above of the outer ply, the middle ply and the
inner ply;
[0012] FIGS. 2a-2d are schematic views of a multilayer paper
according to a second embodiment of the invention in which FIG. 2a
is a longitudinal section of a three-plied product and FIGS. 2b-2d
are plan views from above of the outer ply, the middle ply and the
inner ply;
[0013] FIGS. 3a-3d are schematic views of a multilayer paper
according to a third embodiment of the invention, in which FIG. 3a
is a longitudinal section view of a three-plied product and FIGS.
3b-3d are plan views from above of the outer ply, the middle ply
and the inner ply.
[0014] FIG. 4 is a merely schematic view of a longitudinal section
of a three-plied product according to a fourth embodiment of the
present invention.
[0015] With reference to the FIGS. 1a-1d, a multilayer toilet paper
is shown, namely with more than one ply (at least three) having a
high thickness according to a first embodiment of the invention,
wholly indicated with 10.
[0016] Said multilayer toilet paper 10 has a first outer layer or
ply 20, a second inner layer or ply 30 and at least one middle
layer or ply 40 wave-shaped.
[0017] Said at least one middle layer 40 is preferably waved along
one preferred direction possibly correspondent with a longitudinal
direction 50.
[0018] Preferably, said at least one middle layer 40 has an uniform
waved section.
[0019] That is to increase the thickness and the volume of the
multilayer toilet paper 10 in a way that it results very soft.
[0020] Advantageously in this way it is obtained a multilayer
toilet paper 10 low-cost and simple to realize.
[0021] Preferably, said preferred direction not necessary
corresponds with the longitudinal direction 50 of the extension of
the multilayer toilet paper 10: in fact, it could be also in a
leaned position with respect to the longitudinal direction 50, as
shown in FIG. 3c.
[0022] Said at least one middle layer 40 shows in section a wave or
waves-direction preferably having the same heights, that is to
obtain a multilayer toilet paper 10, having a predetermined
thickness overall on the basis of the elevation of the waves of
said at least one middle layer 40.
[0023] Each wave has preferably an uniform sequence, as those shown
in the various illustrative figures, or it could be a wave with
both a variable shape and elevation steps (not shown).
[0024] Preferably said at least one middle layer 40 shows in
section a wave periodic sequence which is substantially sinusoidal
or cosinusoidal or square or triangular or trapezoidal as shown in
FIG. 4, or it can show a subsequent combination of them.
[0025] Preferably said first outer layer 20 and/or said second
inner layer 30 have a smooth surface, as shown in FIGS. 1a, 3a and
4.
[0026] FIGS. 2a-2d are schematic views of a multilayer paper
according to a second embodiment of the invention.
[0027] Also in this case, a multilayer toilet paper is shown,
having three plies or layers where, for the sake of easiness, the
same reference numerals have been used referring to elements which
have the same function.
[0028] Therefore, said multilayer toilet paper 10 has a first outer
layer or ply 20, a second inner layer or ply 30 and at least one
middle layer or ply 40, which is wave-shaped.
[0029] Moreover, in this case, the first outer layer 20 and the
second inner layer 30 have an embossed surface comprising a
plurality of base projections 21 or differently shaped or with a
broaden size 22.
[0030] The density of the base projections 21 on the embossed
surface shows at least 20 projections/cm.sup.2 which can be
eventually interspaced by the above projections of different shape
22 with various drawings, as pyramids, flowers, etc.
[0031] Moreover, the outer and inner layers 20 and 30 can have
different numbers of projections between each other, as for
instance 40 projections/cm.sup.2 on one side and 25
projections/cm.sup.2 on the other side.
[0032] Such projections included in the embossed surface can be
realized with different heights between each other in a way to
confer to the final product a diversified volume along its
extension with variable softness.
[0033] FIGS. 3a-3d are schematic views of a multilayer paper
according to a third embodiment of the present invention.
[0034] Also in this case, a multilayer toilet paper is shown,
having three layers or plies where, for the sake of easiness, the
same reference numerals are used which have the same function.
[0035] Therefore, said multilayer toilet paper 10 has a first outer
layer or ply 20, a second inner layer or ply 30 and at least one
middle layer or ply 40 differently wave-shaped.
[0036] The first outer layer 20 has an embossed surface comprising
a plurality of base projections 21 differently shaped and/or of a
broader size 22.
[0037] The density of the base projections 21 on the embossed
surface is at least 20 projections/cm.sup.2 which can be eventually
interspaced by the above projections of different shape 22 with
various drawings, such as pyramids, flowers, etc.
[0038] The middle layer 40 is waved in a way to extend along a
leaned direction with respect to the longitudinal direction 50, as
well evidenced in FIG. 3c.
[0039] The inner layer 30 is, in this particular case, but only for
explicative purpose, of the smooth kind.
[0040] In all these examples the link with the layers or plies is
realized thanks to the supply of adhesive, in the scheme with
reference 60.
[0041] The adhesive 60 is placed in correspondence with a plurality
of crests and valleys shown in section of the middle layer 40 in a
way to connect said layer to both the outer layer 20 and inner
layer 30.
[0042] In this way the multilayer toilet paper 10 will appear very
soft in the transversal direction, maintaining moreover good
mechanical characteristics along the longitudinal direction 50.
[0043] It will appear evident that the multilayer toilet paper
realized according to the present invention achieves the objectives
as above described.
[0044] The multilayer toilet paper as conceived in the present
invention can be subjected to numerous modifications and
variations, all comprised in the same inventive concept.
[0045] Moreover, the materials practically used, as well as size
and components, can be whichever according to the technical
requirements.
* * * * *