U.S. patent number 3,589,823 [Application Number 04/854,580] was granted by the patent office on 1971-06-29 for disposable toothbrush.
This patent grant is currently assigned to Wayne S. Werkheiser. Invention is credited to Orrin W. Hendrickson.
United States Patent |
3,589,823 |
Hendrickson |
June 29, 1971 |
DISPOSABLE TOOTHBRUSH
Abstract
A disposable toothbrush with self-contained dentifrice in which
bristles, base therefore and handle are molded in integral
one-piece construction of flexible resilient material. A recess is
defined in the rear of the base for storing the dentifrice and
communicates with the bristles via openings through the base,
whereby the dentifrice may be forced through the openings onto the
bristles.
Inventors: |
Hendrickson; Orrin W. (Los
Angeles, CA) |
Assignee: |
Werkheiser; Wayne S. (Los
Angeles, CA)
|
Family
ID: |
25319083 |
Appl.
No.: |
04/854,580 |
Filed: |
September 2, 1969 |
Current U.S.
Class: |
401/176;
15/167.1; 401/287; 15/104.94; 401/132; 401/268 |
Current CPC
Class: |
A46B
11/0003 (20130101) |
Current International
Class: |
A46B
11/00 (20060101); B43k 005/06 () |
Field of
Search: |
;15/16R,16A,186--188
;401/184,171--186,286--287 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Feldman; Peter
Claims
What I claim is:
1. A disposable toothbrush with self-contained dentifrice,
comprising;
a brush portion comprising a base and bristles extending from the
front of said base;
a handle;
said bristles, base and handle being formed in integral one-piece
construction of flexible resilient material;
a recess defined into said base through the rear surface thereof,
said recess being defined elongate and substantially the length of
said base;
one or more openings defined through said base, at said recess, to
the front thereof;
dentifrice within said recess and a cover close fit in said recess
moveable inwardly toward said one or more openings for forcing said
dentifrice therethrough onto said bristles; one or more rows of aid
bristles being formed substantially axially central of said base
and an arcuate row of said bristles being formed adjacent each side
of said one or more axially central rows but spaced therefrom to
define open regions thereat among said bristles.
2. The invention according to claim 1 in which said cover is a
rigid member substantially conforming to the perimeter of said
recess.
3. The invention according to claim 1 in which said cover for said
recess conforms to the perimeter thereof and has an axial rib on
its external surface.
4. The invention according to claim 1 in which said one or more
openings comprise a plurality of ducts substantially in a line
axially central of said base.
5. The invention according to claim 4 in which said bristles
include two rows thereof formed relatively close along opposite
sides of said line of ducts.
6. The invention according to claim 1 in which said bristles are
each formed flat on two opposite sides.
7. The invention according to claim 1 in which said handle is
formed with a depressed region lengthwise thereof for placement
thereat of written matter.
Description
FIELD OF THE INVENTION
The field of art to which this invention remains is the field of
toothbrushes.
BACKGROUND AND SUMMARY OF THE INVENTION
It is often desirable to have a small toothbrush and a convenient
supply of dentifrice that one could discard after using just once.
For example, one could use such a toothbrush after dining in a
restaurant or in an airplane or train; but such toothbrushes are
not generally available at these locations in sanitary form. A
variety of disposable toothbrushes have been proposed which have
attempted to combine economy of manufacture and preincorporation of
dentifrice with the toothbrush. However, those toothbrushes which
contain dentifrice in a location allowing ready utilization have
generally been too expensive for widespread distribution as a
disposable toothbrush for one-time use. Those prior structures
which are obtained with economy of manufacture generally fail to
provide the dentifrice in a farm wherein the dentifrice can be
readily spread throughout the bristles.
The present invention provides a disposable toothbrush with
self-contained dentifrice which is of extremely simple construction
yet is rugged and capable of vigorous brushing. The toothbrush
provided herein is so inexpensive that it may be economically used
once and then disposed of, and yet contains a suitable quantity of
toothpaste or other dentifrice which is fed directly onto the
bristles at the time of using and readily spreads through the
bristles so that proper foaming and brushing can be accomplished.
Specifically, the toothbrush provided herein includes bristles, a
base therefore and a handle all molded in integral one-piece
construction of flexible resilient material. A recess is defined in
the rear of the base with one or more openings through the base in
communication with the bristles. Dentifrice is contained within the
recess and may be forced through the openings onto the bristles. A
rigid cover is provided for the recess, conforming to the perimeter
thereof, and movable inwardly toward the openings so as to force
the dentifrice through the openings onto the bristles. The recess
is elongate in conformity with the bristle base and the cover has
an axial rib on the external surface thereof to aid in applying
pressure to the dentifrice.
As openings, there is formed a plurality of ducts substantially in
a line axially central of the base and the bristles are arranged so
that two rows thereof are formed relatively close along opposite
sides of the line of ducts. Additionally, a row of the bristles if
formed adjacent each side of these closely formed rows but spaced
therefrom to define open regions among the bristles. Each bristle
is formed flat on two opposite sides to aid in its flexure to
thereby enable a more rapid and thorough spreading of the
dentifrice and more effective cleaning of the teeth. In a
particular embodiment, the handle is formed with a depressed region
lengthwise thereof in which written matter may be placed, for
identification, advertising, or otherwise.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a toothbrush according to the
present invention;
FIG. 2 is a front view of the toothbrush;
FIG. 3 is a rear view of the toothbrush with the recess cover
removed;
FIG. 4 is a plan view of the recess cover;
FIG. 5 is a cross-sectional view of the toothbrush, taken on line
5-5 of FIG. 2, in the direction of the arrows;
FIG. 6 is a detail view of a bristle formed with the toothbrush of
the present invention; and
FIG. 7 is a cross-sectional view of the bristle, taken on line 7-7
of FIG. 6, in the direction of the arrows.
DETAILED DESCRIPTION
Referring to FIG. 1, a perspective view of the disposable
toothbrush 10 is shown. The toothbrush 10 includes a handle portion
12, a base or head portion 14 and bristles 16 extending from one
side of the base 14. The toothbrush 10 is of integral one-piece
construction and formed of a flexible resilient material, such as
by injection molding, or by other processing, or an organic polymer
or polymer-forming material. Generally, such material as
polyethylene, polyvinyl chloride, polyamide, cellulose acetate,
polystyrene, polypropylene, or the like, can be utilized and the
thinness of the bristles 16 will impart added flexiblity to these
materials. However, it is also desirable that the handle portion 12
be somewhat flexible and it is found that polyethylene imparts all
of the desired properties. In order to effect the economies
necessary to enable mass distribution the construction must be as
simple as possible. The structure as described hereinafter is
designed to accomplish this simplicity while imparting functional
advantages not obtained with prior structures.
Referring to FIGS. 2--5, a recess 18 is formed through the back of
the base 14 and generally follows the shape of the base 14. Three
ducts 20, about 0.05 inch diameter, are formed through the base 14
effecting communication between the recess 18 and the bristles 16.
As seen clearly in FIG. 3, the ducts 20 are formed substantially in
a line axially central of the base 14. This feature is conjunction
with the placement of the bristles as hereinafter described enables
rapid and effective disbursement of the dentifrice.
Referring specifically to FIG. 4, a cover 22 is formed for the
recess 18, the outline of the cover 22 conforming substantially to
the perimeter of the recess 18 so as to be close fitting therewith.
In this particular embodiment, a number of notches, such as at 24,
are formed along the rim of the base 14 material defining the
recess, and a corresponding number of similarly located tabs, such
as at 26, are formed along the edge of the cover 22 for engagement
with the notches 24. The cover 22 is provided with a rib 28
externally and axially central thereof and which serves as a
stiffening member for the cover 22 so as to provide the cover 22
with greater rigidity. The recess cover 22 can be made of the same
material as the toothbrush 10, or it can be made of different
material. The cover 22 is advantageously formed of a material which
is more rigid than polyethylene, such as polystyrene.
The bristles 16 are formed so as to extend a sufficient distance
form the front of the base 14 to obtain a degree of flexibility
appropriate to the brushing of teeth. In this particular
embodiment, the bristles are obtained by drilling holes into the
mold plate eleven thirty-seconds inch deep and 0.045 inch wide.
Referring to FIGS. 6 and 7, the drill holes are coined flat so as
to obtain bristles which are each formed flat on two opposite sides
30 and 32.
Referring back to FIGS. 2 and 5, the bristles 16 are arranged in a
particular order which aids in rapidly spreading and foaming the
dentifrice. This arrangement is illustrated in FIG. 2 where it is
seen that at least two rows of bristles are formed relatively close
axially central of the base 14 along opposite sides of the line of
ducts 20. In this particular case, there are three such rows of
bristles designated collectively by the numeral 34, the center row
thereof being formed directly over the line of ducts 20.
Additionally, a row of bristles 36 and 38 is formed adjacent each
side of the central group of bristles 34 but is spaced therefrom to
define open regions 40 and 42. Additional bristles may be formed
outside of and adjacent these bristles rows 36 and 38. The closely
spaced axially central rows of bristles 34 and open spaces 40 and
42 function as hereinafter described.
Referring again to FIG. 5, after the toothbrush 10 is formed, the
recess 18 is filled with a dentifrice 44. Any dentifrice 44 can be
utilized, such as toothpaste, toothpowder, or a water-soluable
capsule. In the latter cases, the toothbrush 10 would have to be
immersed in water to allow the water to enter the ducts 20 and
dissolve the capsule or powder, whereupon the toothbrush can be
utilized as hereinafter described. Advantageously the dentifrice 44
is toothpaste. The cover 22 is then put in place and is
sufficiently close fit to the recess 18 that it frictionally
adheres to the base 14.
The assembled toothbrush 10 containing the dentifrice 44 can be
packaged in any convenient manner and distributed in the form
illustrated. In use, one need merely remove the toothbrush from the
package, press the cover 22 inwardly toward the ducts 20 to force
the dentifrice 44 onto the bristles 16, and then brush. When the
dentifrice 44 is forced through the ducts 20, it is disposed
between the closely arranged bristles in the axially central rows
34. Brushing flexes these bristles which serve to whip up the
dentifrice and to squeeze the dentifrice into the open regions 40
and 42, where it foams up. The novel construction herein thus
effects a rapid distribution and foaming of the dentifrice.
Referring now to a further feature of this invention, and
particularly with reference to FIGS. 1, 2 and 5, the handle 12 is
formed with a depressed, generally flat region 46 on one side
thereof, advantageously on the bristle side. By such means, one can
insert identifying material, in the form of an elongate sticker, in
the region 46, which may be advertising material, or merely a label
identifying the manufacture of the toothbrush.
* * * * *