U.S. patent number 3,804,330 [Application Number 05/323,591] was granted by the patent office on 1974-04-16 for vapor releasing device.
This patent grant is currently assigned to Shell Oil Company. Invention is credited to Victor F. Anderson, Robert W. Fortenbach, Raymond W. Holt, Alexander Miller, Jr..
United States Patent |
3,804,330 |
Miller, Jr. , et
al. |
April 16, 1974 |
VAPOR RELEASING DEVICE
Abstract
A vapor releasing device for reodorants, pesticides or other
vaporous materials is defined by a flat upper portion having a
downwardly protruding centrally located ridge on the underside
thereof. The upper portion has opposing downwardly extending walls
which contain inwardly protruding lips forming a slot or opening. A
flexible solid containing the vaporous material is engaged in the
slot-like opening.
Inventors: |
Miller, Jr.; Alexander
(Modesto, CA), Anderson; Victor F. (Wenonah, NJ), Holt;
Raymond W. (Pleasant Hills, CA), Fortenbach; Robert W.
(Lafayette, CA) |
Assignee: |
Shell Oil Company (Houston,
TX)
|
Family
ID: |
23259862 |
Appl.
No.: |
05/323,591 |
Filed: |
January 15, 1973 |
Current U.S.
Class: |
239/34;
239/60 |
Current CPC
Class: |
B65F
7/00 (20130101); A01M 1/2055 (20130101) |
Current International
Class: |
A01M
1/20 (20060101); A62l 009/04 () |
Field of
Search: |
;239/36,53,54,55,56,60,34 ;220/41 ;206/39 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: King; Lloyd L.
Assistant Examiner: Kashnikow; Andres
Claims
1. A vapor releasing device comprising a flat upper portion having
a downwardly protruding centrally located ridge running on the
underside of said upper portion; said device having opposing
downwardly extending walls from said upper portion in the same axis
as said ridge, said walls containing inwardly protruding lips
running longitudinally along said walls thereby forming a slot,
said slot holding a flexible solid containing a vapor releasing
material which flexible solid is engaged
2. A vapor releasing device according to claim 1 wherein said
device has a
3. A vapor releasing device according to claim 1 wherein the
flexible solid
4. A vapor releasing device according to claim 3 wherein the
vapor
5. A vapor releasing device according to claim 3 wherein the
vapor
6. A vapor releasing device according to claim 3 wherein the
thermoplastic resin is in two pieces, the dividing line between
said pieces being in a
7. A vapor releasing device according to claim 6 wherein one
thermoplastic resin contains a pesticide as the vapor releasing
material and the second thermoplastic resin contains a reodorant as
the vapor releasing material.
8. The vapor releasing device of claim 7 wherein the thermoplastic
resin is plasticized polyvinyl chloride.
Description
BACKGROUND OF THE INVENTION
This invention relates to devices for slowly releasing vaporous
materials into the surrounding environment. More particularly, this
invention relates to devices comprising a holder having engaged
therein a flexible solid containing a vaporous material such as a
pesticide or reodorant.
A problem common to both homeowners and industry is the control of
pests such as houseflies, mosquitoes and the like within a closed
environment. A similar problem is in masking or removing offensive
odors also within a closed space. Various methods have been used to
control both problems. For example, aerosol sprays have been
developed to dispense a fine mist within the closed environment;
however, such a method of application is of limited duration and
effectiveness and requires frequent repetition.
Devices have been used which provide for a slow but continuous
release of a vaporous material into the atmosphere. One such device
comprises a liquid impregnated on an absorbent material from which
the liquid slowly evaporates. More recent devices have included the
use of solid materials containing a liquid having a relatively high
vapor pressure. Among such items are thermoplastic resins
containing within the resin matrix a liquid pesticide or reodorant
which slowly diffuses through the plastic matrix to the surface
then into the surrounding atmosphere.
A particular problem has been the control of pests and/or odors in
environments of limited space such as in garbage cans or other
trash disposal containers. In these situations odors and insects
are not only offensive but may also be harmful. Conventional
methods of controlling pests and odors such as sprays and
commercially available slow release products are not satisfactory.
Aerosols are of limited duration. Slow release products are
generally placed or hung in an out-of-the-way place. Trash
containers or other environments of limited space have virtually no
areas not subject to being disturbed and are often subjected to
rough handling thereby rendering the use of current slow release
products difficult.
DESCRIPTION OF THE INVENTION
A vapor releasing device has now been developed which may be used
in any environment but is particularly adapted for use in areas of
limited space. This device may be used to dispense one or more
types of vapors.
The accompanying drawings illustrate various embodiments of the
invention.
FIG. 1 is a perspective view of a simple embodiment of the vapor
releasing device utilizing a single flexible solid partially
engaged in the holder.
FIG. 2 is an end elevational view of a simple embodiment of the
vapor releasing device utilizing a single flexible solid engaged in
the holder.
FIG. 3 is a top elevational view of the vapor releasing device
having one form of attaching means.
FIG. 4 is a perspective view of the holder having interrupted
inwardly protruding lips.
Corresponding reference characters indicate corresponding parts
throughout the several views of the drawings.
The vapor releasing device as illustrated comprises a holder 10 and
a flexible solid 11 containing a vapor releasing material. Holder
10 is made out of metal, plastic, cardboard or other appropriate
material. Preferably holder 10 is made of a flexible plastic.
Holder 10 consists of a flat upper portion 12, which may be of any
desired shape but for purposes of illustration is shown as a
rectangle, having opposing downwardly extending walls 14 containing
inwardly protruding lips 15. The inwardly protruding lips 15 run
longitudinally along wall 14 and may be continuous as illustrated
in FIG. 1 or may be interrupted to form two or more protrusions 15'
as shown in FIG. 4. Along the underside of flat upper portion 12
extends a centrally located ridge 13. This ridge may be a single
ridge as illustrated or a series of ridges and runs along the same
axis as inwardly protruding lips 15. The area enclosed by the upper
portion 12, the downwardly extending walls 14 and inwardly
protruding lips 15 forms a slot in which flexible solid 11 can be
engaged. Flexible solid 11 is the same shape as the slot defined
and is the same size as the slot or preferably slightly larger so
that it will be firmly engaged in holder 10. Flexible solid 11 can
be made of any material which will hold a vaporous chemical such as
a reodorant or a pesticide. Materials such as cellulose, natural
and synthetic rubber and synthetic polymers or resins can be used.
Particularly preferred are thermoplastic resins such as the
polyvinyl halides, e.g., plasticized polyvinyl chloride. Flexible
solid 11 is engaged in holder 10 so that the upper portion of said
solid is in contact with ridge 13 and the lower outer portions of
solid 11 are in contact with the upper portion of lips 15. The
sides of solid 11 may also be in contact with the inner surface of
walls 14. In this manner the solid 11 is held firmly in place.
Holder 10 is so designed that solid 11 may have air circulation
over both top and bottom surfaces thereof.
Holder 10 contains on the upper flat portion 12, or on any other
attachable plane vertical, horizontal or diagonal that permits
adequate attachment of the holder 10, means 17 for attaching said
holder to a supporting surface. Such surface may be the underside
of a conventional garbage can lid or any other location on a
garbage container or a supporting frame for disposable garbage
containers, that would provide the maximum generating function of
the flexible solid 11 without interference from the adjacent
container walls or its contents whereby such interference would
cause a premature separation of the holder 10 with the removal of
the garbage. One such means is a double back adhesive tape, having
a thin foam cushion between the two adhesive surfaces. One side of
the tape is attached to holder 10 and the other side to the
supporting surface. Other means such as other adhesives in tape,
liquid or paste form or any known mechanical connection such as
rubber bands, magnets, straps, slots or snap-on or screw-on
retaining means may be used to attach holder 10 to a supporting
surface.
Flexible solid 11 may be fabricated in one or more pieces. For
example, solid 11 may be divided into two sections or pieces along
line 18 perpendicular to lip 15. One section could contain one
vaporous chemical such as an insecticide and the other section may
contain a second chemical such as a reodorant.
A further embodiment of the invention wherein two different
flexible solids are employed is accomplished by making holder 10
out of an appropriate material capable of containing a vaporous
chemical such as a pesticide or reodorant. Hence holder 10 becomes
one vapor releasing flexible solid and flexible solid 11 the
other.
The above described vapor releasing devices are described as being
adapted for use in closed spaces and in garbage or trash cans in
particular. It is obvious that the supporting surface to which they
are attached could be in any desired environment such as rest
rooms, hospital rooms, bathrooms, hospitals, hotels, motels, homes
and offices.
It is obvious that various changes could be made in the
construction and shape of the vapor releasing devices without
departing from the scope of the invention. The above description
and attached drawings are considered to be illustrative of the
invention only and not limiting.
* * * * *