|Publication number||US3804330 A|
|Publication date||Apr 16, 1974|
|Filing date||Jan 15, 1973|
|Priority date||Jan 15, 1973|
|Publication number||US 3804330 A, US 3804330A, US-A-3804330, US3804330 A, US3804330A|
|Inventors||V Anderson, R Fortenbach, R Holt, A Miller|
|Original Assignee||Shell Oil Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (58), Classifications (7), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent Miller, Jr. et al.
VAPOR RELEASING DEVICE Inventors: Alexander Miller, Jr., Modesto,
Calitl; Victor F. Anderson, Wenonah, N.J.; Raymond W. Holt, Pleasant Hills; Robert W. Fortenbach, Lafayette, both of Calif.
Assignee: Shell Oil Company, Houston, Tex.
Filed: Jan. 15, 1973 Appl. No.: 323,591
US. Cl 239/34, 220/41, 239/60, Int. Cl. A62] 9/04 Field of Search 239/36, 53, 54,55, 56,
References Cited UNITED STATES PATENTS 374,509 12/1887 Thum 206/39  Apr. 16, 1974 1.742.962 l/l930 McCrosky 239/55 3.575.345 4/l97l Buck. Jr 239/34 3.S67,l l9 3/l97l Wilbert 239/36 X 3,565,339 2/1971 Curran 239/60 Primary Examiner-Lloyd L. King Assistant ExaminerAndres Kashnikow  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 theunderside 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.
8 Claims, 4 Drawing Figures 1 VAPOR RELEASING DEVICE 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-theway 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 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.
We claim as our invention:
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 therein between said upper portion and the inwardly protruding lips.
2. A vapor releasing device according to claim 1 wherein said device has a means for attaching said device to a supporting surface.
3. A vapor releasing device according to claim 1 wherein-the flexible solid is a thermoplastic resin.
4. A vapor releasing device according to claim 3 wherein the vapor releasing material is a pesticide.
5. A vapor releasing device according to claim 3 wherein the vapor releasing material is a reodorant.
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 plane perpendicular to said inwardly protruding lips.
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.
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|U.S. Classification||239/34, 239/60|
|Cooperative Classification||B65F7/00, A01M1/2055|
|European Classification||A01M1/20C2S, B65F7/00|
|Nov 14, 1988||AS02||Assignment of assignor's interest|
Owner name: KENCO CHEMICAL & MFG. CORPORATION
Effective date: 19880801
Owner name: UNITED INDUSTRIES CORPORATION, 8494 CHAPIN INDUSTR
|Nov 14, 1988||AS||Assignment|
Owner name: UNITED INDUSTRIES CORPORATION, 8494 CHAPIN INDUSTR
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KENCO CHEMICAL & MFG. CORPORATION;REEL/FRAME:004979/0405
Effective date: 19880801
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KENCO CHEMICAL & MFG. CORPORATION;REEL/FRAME:004979/0405
Owner name: UNITED INDUSTRIES CORPORATION, A CORP. DE, MISSOUR
|Oct 30, 1985||AS08||Conditional assignment|
Free format text: KENCO CHEMICAL & MFG. CORP., 10 WEST ADAMS STREET, JACKSONVILLE, FLORIDA, 32202 * DOW CHEMICAL COMPANY : 19850926
|Oct 30, 1985||AS||Assignment|
Owner name: KENCO CHEMICAL & MFG. CORP., 10 WEST ADAMS STREET,
Free format text: CONDITIONAL ASSIGNMENT;ASSIGNOR:DOW CHEMICAL COMPANY;REEL/FRAME:004475/0299
Effective date: 19850926
|Jan 22, 1985||AS||Assignment|
Owner name: DOW CHEMICAL COMPANY, THE MIDLAND MICHIGAN 48640 A
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MORTON THIOKOL INC;REEL/FRAME:004354/0531
|Jan 22, 1985||AS02||Assignment of assignor's interest|
Owner name: DOW CHEMICAL COMPANY, THE MIDLAND MICHIGAN 48640 A
Owner name: MORTON THIOKOL INC :