U.S. patent number 3,759,261 [Application Number 05/233,160] was granted by the patent office on 1973-09-18 for diapers, disposable diapers and disposable diapers with water-proof layer.
Invention is credited to Rong-Shuang Wang.
United States Patent |
3,759,261 |
Wang |
September 18, 1973 |
DIAPERS, DISPOSABLE DIAPERS AND DISPOSABLE DIAPERS WITH WATER-PROOF
LAYER
Abstract
A diaper which is capable of providing a readily visible
indication when wet includes an inner layer of absorbent material,
a layer carrying a printed pattern, and at least one outer layer
which is of sufficient density as to conceal the printed pattern
when the diaper is dry while rendering the printed pattern readily
visible when the diaper is wet.
Inventors: |
Wang; Rong-Shuang (Beverly,
NJ) |
Family
ID: |
22876128 |
Appl.
No.: |
05/233,160 |
Filed: |
March 9, 1972 |
Current U.S.
Class: |
604/361; 604/378;
116/200 |
Current CPC
Class: |
A61F
13/42 (20130101) |
Current International
Class: |
A61F
13/42 (20060101); A61f 013/16 () |
Field of
Search: |
;128/284,287 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Rosenbaum; Charles F.
Claims
I claim:
1. A diaper capable of providing a readily visisble indication of a
wetness condition of the body underneath the diaper, comprising: a
carrier layer of material, means providing at least one color on
said carrier layer, and means covering said color with said color
contrasting with said covering means and said covering means being
of a density for rendering said color substantially invisible when
said covering means is dry while rendering said color visible when
said covering menas is wet, said color being dark relative to said
carrier layer and said covering means including an outer layer of
relatively light-colored material overlying said dark color to mask
said color when said outer layer is dry, said color being disposed
in a pattern on one side of said carrier layer and being water
insoluble, whereby the condition of the body beneath the article
may be readily determined upon inspection of the covering
means.
2. A diaper according to claim 1, wherein said pattern is printed
on said carrier layer.
3. A diaper according to claim 2 wherein said one side of said
carrier layer faces outwardly.
4. A diaper according to claim 2 wherein said one side of said
carrier layer faces inwardly.
5. A diaper accroding to claim 1 wherein said covering means is
fabricated of a low-density material.
6. A diaper according to claim 1 including at least one absorbent
layer underlying said carrier layer and a waterproof layer
overlying said covering means.
Description
The present invention relates to diapers, and more particularly,
the present invention relates to diapers which are capable of
providing a readily visible indication when they are wet.
It is known that adults sometimes have difficulty in determining
whether or not a diaper on a baby is wet or dry without disturbing
the baby, and if the baby is asleep, it may be awakened
inadvertently. According, a diaper which is capable of providing a
readily visible signal when wet and in need of being changed is
highly desirable.
With the foregoing in mind, it is a primary object of the present
invention to provide a diaper having novel means for providing a
readily visible indication when wet so that an adult can tell
whether or not the diaper needs to be changed without disturbing a
baby wearing the diaper.
More specifically, the present invention provides a diaper which
possesses the outward appearance of an ordinary diaper when dry but
which displays a readily visible pattern when wet. The diaper
includes an inner layer of absorbent material, a carrier layer of
material on which the pattern is printed and which is superimposed
on the inner layer, and an outer layer overlying the printed
carrier layer. The carrier layer is preferably of a light color,
and the printed matter is of a color which contrasts therewith. The
outer layer is of a light-colored material and is of sufficient
density as to conceal the printed matter when dry while permitting
the printed matter to be readily visible when the outer layer is
wet. An adult is thereby able to determine whether or not the
diaper needs to be changed simply by inspecting the diaper without
disturbing its wearer.
These and other objects, features and advantages of the present
invention should become apparent from the following description
when taken in conjunction with the accompanying drawing, in
which:
FIG. 1 is a perspective view of a diaper embodying the present
invention;
FIG. 2 is an enlarged perspective view of the area enclosed by
broken lines in FIG. 1 but with layers of the diaper peeled away to
expose printed matter on one layer; and
FIG. 3 is an enlarged cross sectional view taken along line 3--3 of
FIG. 1.
Referring now to the drawing, there is illustrated in FIG. 1 a
diaper 10 embodying the present invention. The diaper 10 has the
outward appearance of a conventional diaper when it is dry;
however, the diaper 10 is capable of providing a readily visible
display or signal when it is wet. As a result, an adult is able to
determine whether or not the diaper 10 needs to be changed simply
by inspecting the outside of the diaper 10 without the necessity of
disturbing a baby wearing the same.
As best seen in FIG. 2, the diaper 10 is preferably of the
disposable type and comprises a plurality of layers of cloth or
paper material underneath an outermost layer 11 of translucent
water-impervious material. As may be seen in FIG. 3, the diaper 10
has an innermost layer 12 which is normally disposed against the
body of the baby in the customary manner, and an inner layer of
absorbent material 13 superimposed on the innermost layer 12 for
absorbing the baby's excrement. A conventional disposable diaper
would include the layers 11 and 12 and 13, and the diaper would
function in the customary manner. Such a diaper may be termed a
disposable diaper with a waterproof layer (DDWL). of course, it
should be understood that the present invention may be incorporated
in conventional washable diapers or disposable diapers without
waterproof layers.
According to the present invention, the diaper 10 is provided with
means for providing a readily visible display or signal when it is
wet. For this purpose, a carrier layer of material 14 is
superimposed on the absorbent layer 13, and a pattern 15 is
imprinted on the carrier layer 14. As may be seen in FIG. 2, the
pattern 15 may include floral patterns or the like, and the color
of the printed pattern 15 is selected to contrast with the color of
the underlying carrier layer 14. Preferably, the printed pattern 15
is dark relative to the carrier layer 14, and it is desirable for
the colors of the printed pattern 15 to be insoluble and otherwise
unaffected by excrement, including urine.
In order to mask the printed pattern 15 when the diaper 10 is dry,
while permitting the printed matter 15 to appear when the diaper 10
is wet, at least one outer layer 16 and preferably a plurality of
layers or sheets of loose and light cloth, paper, or paper like
material 16 and 17, depending upon the density of the material
forming each layer, covers the carrier layer 14 and conceals the
pattern 15. The color of the material forming the sheets 16 and 17
is preferably light relative to the pattern 15 and, in the present
instance, the pattern 15 is dark so as to contrast with the sheets
16 and 17. It is noted that the pattern 15 may be printed on either
the inside or the outside of the carrier layer 14. The outer layers
16 and 17 also absorb excrement as does the innermost layers 12 and
13. By virtue of this structure, the outer layers 16 and 17 prevent
the printed pattern 15 from being visible from the top or outside
of the diaper 10 when the diaper 10 is dry; however, the layers 16
and 17 permit the pattern 15 to be readily visible from outside the
diaper when the diaper 10 and particularly the outer layers 16 and
17 are wet. Accordingly, an adult is able to determine whether or
not the diaper 10 needs to be changed simply by inspecting the
diaper without disturbing the baby.
In view of the foregoing it should be apparent that there has now
been provided an improved diaper which is capable of providing a
readily visible indication when it is wet. The diaper preferably
includes at least one inner layer, a carrier layer on the inner
layer, and an outer layer on the carrier layer, each of which is
capable of absorbing excrement. The present invention may be
incorporated in diapers of conventional construction materials.
While a preferred embodiment of the present invention has been
described in detail, various modifications, alterations or changes
may be made without departing from the spirit and scope of the
present invention as defined in the appended claims.
* * * * *