EP0168075A1 - Passiver Dosierverteiler, bei dem eine intern erzeugte eingeschlossene Gasblase einen Produktabschluss bewirkt - Google Patents

Passiver Dosierverteiler, bei dem eine intern erzeugte eingeschlossene Gasblase einen Produktabschluss bewirkt Download PDF

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Publication number
EP0168075A1
EP0168075A1 EP85200853A EP85200853A EP0168075A1 EP 0168075 A1 EP0168075 A1 EP 0168075A1 EP 85200853 A EP85200853 A EP 85200853A EP 85200853 A EP85200853 A EP 85200853A EP 0168075 A1 EP0168075 A1 EP 0168075A1
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EP
European Patent Office
Prior art keywords
dispenser
solution
liquid
passageway
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85200853A
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English (en)
French (fr)
Inventor
Stephen Henry Iding
Robert Stanley Dirksing
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Procter and Gamble Co
Original Assignee
Procter and Gamble Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Publication of EP0168075A1 publication Critical patent/EP0168075A1/de
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D9/03—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing consisting of a separate container with an outlet through which the agent is introduced into the flushing water, e.g. by suction ; Devices for agents in direct contact with flushing water
    • E03D9/033—Devices placed inside or dispensing into the cistern
    • E03D9/038—Passive dispensers, i.e. without moving parts
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D2009/024—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing using a solid substance

Definitions

  • the present invention relates to dosing dispensers for products such as toilet tank additives, especially disinfectants.
  • the present invention relates particularly to an entirely passive (no moving parts) dispenser in which a solid product gradually dissolves to form a solution, and from which dispenser a dose of such solution issues each time the toilet is flushed.
  • Such a product dispensing system is well adapted to a consumer product which may be used to dispense active ingredients such as hypochlorite solution to condition toilet tank and bowl water.
  • active ingredients such as hypochlorite solution to condition toilet tank and bowl water.
  • the absence of any moving parts in the dispenser makes it possible to produce such a dispenser very inexpensively, such as by thermoforming two thin plastic halves and sealing them together.
  • Such a dispenser may be made so economically that it is well adapted for use as a disposable dispenser which may be discarded after the active ingredients sealed therein are depleted.
  • a passive dosing dispenser contains a solution which is to be isolated from a body of liquid when the dispenser is at least partially immersed therein.
  • the dispenser is adapted to have a dose of the solution issue from the dispenser in response to the level of the body of liquid being lowered from a first elevation to a second elevation and to take liquid into the dispenser as the level of the body of liquid rises from the second elevation to the first elevation.
  • the dispenser comprises the following:
  • the present invention differs from dispensers such as those disclosed in Dirksing '747 cited hereinbefore in that isolation of the solution in the dispenser from the toilet tank water is not achieved immediately by means of an air-lock which is formed by repositioning of an air bubble which is trapped as the dispenser is filled with tank water.
  • dispensers of the present invention utilize internally-generated gas bubbles to form or complete the formation of (i.e. establish) a gas-lock which isolates the solution in the dispenser from the toilet tank water.
  • These internally generated gas bubbles can be from any source; however, they are preferably generated by the additive solution in the dispenser.
  • Solid cakes containing active ingredients for toilet tank dispensers are known.
  • cakes which provide hypochlorite ion to the active solution are preferred.
  • Such hypochlorite dispensing systems commonly contain solid cakes having one of two solid sources of hypochlorite ion: calcium hypochlorite or trichloroisocyanurate (TCCA).
  • Calcium hypochlorite is somewhat soluble in water and dissolves from a cake containing it to provide hypochlorite ion in solution according to reaction (1);
  • a typical calcium hypochlorite cake also contains a base, such as calcium hydroxide, so that the active ingredient solution in a dispenser containing such a cake has a pH of about 10-11.
  • TCCA (or trichloro-s-triazinetrione) is produced by reacting cyanuric acid with chlorine gas in basic solution.
  • TCCA is a solid which is somewhat soluble in water.
  • TCCA reacts with water to produce hypochlorite ion
  • hypochlorite ion Either 1, 2, or 3 of the chlorine constituents on the TCCA molecule can react with water to form hypochlorite as shown in reaction (2): This reaction generates hydrogen ion, and a typical active ingredient solution in a dispenser containing TCCA cake has a pH of about 2-3.
  • hypochlorite ion in solution is in equilibrium with hypochlorous acid, as shown in reaction (3), regardless of how the hypochlorite ion is formed, e.g. by reaction (1) or (2):
  • reaction (4) occurs much more rapidly in acidic solution than it does in basic solution. Because of its typically lower pH, a toilet tank dispenser containing TCCA cake is generally capable of producing chlorine gas much more rapidly than one containing calcium hypochlorite cake.
  • FIG. 1 A schematic, sectional elevation view of a preferred dispenser 10 of the present invention is shown in Figure 1.
  • a dispenser can be produced from two thin thermoformed plastic halves which are sealed together by any conventional means, such as heat sealing, radiation sealing, or adhesive sealing.
  • the passageways and cavities of such dispensers can be produced with differing depths in order to provide the desired volume for each cavity or passageway. Portions of such passageways and cavities provide internal reservoir 25 which contains a product which is soluble in the liquid 5 of body of liquid 20 to form solution 21 and which is adapted, in use, to contain a quantity of solution 21.
  • Dispenser 10 comprises first cavity 11 which contains solid cake of disinfectant 12. Dispenser 10 also comprises second cavity 13, and third passageway 14 between first (cake) cavity 11 and second cavity 13.
  • First (inlet/discharge) passageway 15 provides fluid communication between internal reservoir 25 and body of liquid 20 outside dispenser 10 through inlet/discharge hole 16 when dispenser 10 is in use.
  • Second (vent) passageway 17 provides, in use, fluid communication between internal reservoir 25 and external medium (either air as shown in Figure 1 or body of liquid 20, depending on whether dispenser 10 is partially or entirely immersed in body of liquid 20) and provides an air vent for dispenser 10 through vent hole 18.
  • Solution 21 is contained in dispenser 10 in internal reservoir 25 which includes second cavity 13, at least a portion of first passageway 15, third passageway 14, the lower portion of first cavity 11 up to level B, and the lower portion of second passageway 17 up to elevation A.
  • First passageway 15 has a reservoir-side opening 28 and an intermediate, inverted, generally u-shaped section 22 the legs of which extend to elevation below that of its central portion.
  • Vent hole 18 and second (vent) passageway 17 provide means for air to enter dispenser 10 to replace solution 21 when it is discharged from dispenser 10 through inlet/discharge hole 16, and means for air to exit dispenser 10 when liquid 5 enters dispenser 10 through inlet/discharge hole 16.
  • Vent hole 18 is preferably above the level of body of liquid 20 throughout the flush cycle.
  • Dispenser 10 is at least partially immersed in body of liquid 20.
  • Body of liquid 20 is typicatty the water in a water tank of a toilet.
  • body of liquid 20 is at a level of first elevation A which Is the normal level of the toilet tank water during quiescent periods.
  • Dispenser 10 is preferably immersed in body of liquid 20 such that first elevation A is between vent hole 18 and level B which is the highest point of opening 19 between first (cake) cavity 11 and second (vent) passageway 17.
  • the level of body of liquid 20 has been lowered from first elevation A to second elevation C which is preferably below inletldischarge hole 16.
  • a lowering of the level of body of liquid 20 occurs in the water tank of a toilet when the toilet is flushed.
  • solution 21 in dispenser 10 flows through first passageway 15 and out inletidischarge hole 16 into body of liquid 20.
  • Such flow of solution 21 continues until the level of solution 21 in dispenser 10 approximately reaches level D.
  • As solution 21 flows from dispenser 10 and its level drops air enters dispenser 10 through vent hole 18 and replaces the portion of solution 21 discharged.
  • the level of solution 21 in dispenser 10 approximately reaches level D, air flows from third passageway 14 into first passageway 15 and the flow of solution 21 from dispenser 10 substantially ceases.
  • liquid 5 from body of liquid 20 flows into dispenser 10 through inletldischarge hole 16 and through first passageway 15. Air is forced out of dispenser 10 through vent hole 18 as liquid 5 enters through hole 16. The incoming liquid 5 enters second cavity 13 and mixes with the portion of solution 21 which remains in second cavity 13.
  • the liquid level in dispenser 10 rises until first passageway 15, second cavity 13 and third passageway 14 are completely filled with liquid/solution, as shown in Figure 3, and until first cavity 11 fills to the upper level of opening 19 (level B) between first cavity 11 and second passageway 17.
  • Second passageway 17 fills to about the same level as first elevation A of body of liquid 20.
  • the level of liquid/solution in dispenser 10 does not rise substantially above level B in first cavity 11 because of air trapped in the upper portion of first cavity 11.
  • First passageway 15 is configured such that, in use, immediately after cessation of the flow of liquid 5 into internal reservoir 25, a continuum of liquidlsolution bridges inverted, generally u-shaped section 22.
  • cake 12 is a solid which provides hypochlorite ion for solution 21.
  • the portion of cake 12 below level B is immersed in solution when body of liquid 20 is at elevation A.
  • solution 21 has been diluted with liquid 5.
  • a portion of cake 12 dissolves in the diluted solution until solution 21 is saturated with the soluble ingredients of cake 12.
  • Hypochlorite dissolved from cake 12 disperses throughout connecting portions of solution 21 in internal reservoir 25 of dispenser 10.
  • Hypochlorite disperses in solution 21 by diffusion and because of differential specific gravity. Concentrated hypochlorite solution formed around cake 12 has a higher specific gravity than more dilute solution elsewhere in internal reservoir 25. Such concentrated solution tends to flow downward in dispenser 10 through third passageway 14 into second cavity 13.
  • Dispensers of the present invention have a passive means for providing a first gas-lock in the inlet/discharge (first) passageway when the dispenser is in use.
  • first gas-lock means is inverted, generally u-shaped section 22 of first passageway 15.
  • First passageway 15 is of such configuration that it either does not trap a bubble of air as liquid 5 flows into dispenser 10 or the bubble of air which is trapped is not of sufficient size to reposition and form an air-lock in first passageway 15 immediately after dispenser 10 is filled.
  • Dispensers of the present invention have a gas generating means for providing gas bubbles in the dispenser during use.
  • gas generating means e.g. bicarbonates and acid, peroxides, carbides, borohydrides, etc.
  • the gas generating reactions of such constituents are preferably controlled such that gas is slowly generated over the entire period of use of the dispenser. Physically entrapped gases which are slowly released during the period of use of the dispenser can be incorporated in dispensers of the present invention as gas generating means.
  • the gas generating means preferred for dispensers of the present invention is an active ingredient solution which provides gas bubbles for the gas-lock means.
  • solution 21 contains hypochlorite ions
  • the gas generating means is solution 21 in which a chemical reaction occurs which produces chlorine gas bubbles.
  • the hypochlorite in solution 21 partially decomposes with time according to reactions (3) and (4) hereinabove to form the chlorine gas.
  • a sufficient quantity of these gas bubbles collect in the gas-lock means (inverted, generally u-shaped section 22 of first passageway 15) to establish gas-lock 24 which isolates solution 21 in dispenser 10 from body of liquid 20.
  • Dispensers of the present invention have passive means for directing a sufficient portion of the gas bubbles from the gas generating means to the gas-lock means of the inlet/discharge passageway to form or complete the formation of a gas-lock thereacross, when the dispenser is in use.
  • passive means for directing gas bubbles preferably comprises a generally transversely extending surface located above at least a portion of the volume of the internal reservoir and in a position to intercept at least a portion of the gas bubbles from the gas generating means.
  • the means for directing chlorine gas bubbles 29 to gas-lock 24 comprises generally transversely extending surface 26 which is located above second cavity 13 (a portion of reservoir 25) and in a position to intercept at least a portion of gas bubbles 29.
  • Transversely extending surface 26 is preferably inclined upwardly toward and is preferably contiguous with reservoir-side opening 28 of inlet/discharge passage 15.
  • Transversely extending surface 26 preferably comprises an upwardly inclined portion 27 of inlet/discharge (first) passageway 15 leading to inverted, generally u-shaped section 22 of first passageway 15. Gas bubbles 29 from solution 21 in second cavity 13 are thus directed toward the gas-lock means, inverted generally u-shaped section 22, of first passageway 15.
  • the amount of time required to form or complete the formation of gas-lock 24 in inverted, generally u-shaped section 22 of inlet/discharge passageway 15 depends on several factors including the amount of air, if any, which is trapped in inlet/discharge passageway 15 during recharging, the rate of gas generation of the gas generating means and the portion of gas bubbles 29 which are directed to gas-lock means 22.
  • transversely extending surface 26 overlies at least about 1 cc of solution 21, more preferably at least about 2 cc of solution 21, more preferably still at least about 5 cc of solution 21.
  • Dispensers of the present invention can be immersed in the water of a toilet tank such that the vent hole is immersed when body of liquid 20 is at the level of first elevation A.
  • a passive means for providing a second gas-lock in the vent (second) passageway it is preferred that there be a passive means for providing a second gas-lock in the vent (second) passageway.
  • FIG. 5 is a schematic, sectional elevation view of dispenser 30 which is similar in design to dispenser 10 of Figures 1-4 and operates substantially in the same manner as dispenser 10.
  • Gas-lock 44 forms in inverted, generally u-shaped section 42 of inlet/discharge (first) passageway 35 in the same manner as gas-lock 24 forms in first passageway 15 of dispenser 10.
  • dispenser 30 is designed such that a gas-lock can be achieved in vent (second) passageway 37 when vent hole 38 is immersed in body of liquid 20 with body of liquid 20 at first elevation A.
  • second passageway 37 provides fluid communication between internal reservoir 45 which contains solution 41 and external medium through vent hole 38 for air to enter and exit dispenser 30.
  • Second passageway 37 has inverted, generally u-shaped section 46 the legs of which extend to elevations below that of its central portion, for providing second gas-lock 48 in second passageway 37.
  • FIG. 6 is a schematic, sectional elevation view of another exemplary dispenser of the present invention.
  • Dispenser 50 is preferably immersed in body of liquid 20 such that first elevation A (the level of body of liquid 20 during quiescent periods) is between vent hole 58 and level E which is the upper edge of second cavity 53.
  • cake 52 in cake (first) cavity 51 is totally immersed in solution 61 at all times during a flush cycle and preferably comprises a material which slowly dissolves in water to provide hypochlorite ion to solution 61 which is contained in internal reservoir 65.
  • the level of body of liquid 20 drops from first elevation A to second elevation C
  • the level of solution 61 in dispenser 50 drops from approximately the level of elevation A to approximately the level of inlet/discharge hole 56.
  • a continuum of liquid/solution bridges inverted, generally u-shaped section 62 of inletldischarge (first) passageway 55.
  • gas bubbles 69 generated in cake cavity 51 are directed into reservoir-side opening 68 of first passageway 55 by inclined, transversely extending surface 66.
  • gas bubbles 69 rise through first passageway 55 to gas-lock means (inverted generally u-shaped section) 62 of first passageway 55 where gas-lock 64 is established, thus isolating solution 61 from body of liquid 20 which were in contact through inlet/discharge hole 56.
  • Gas bubbles 69 generated in second cavity 53 or third passageway 54 rise through solution 61 to second passageway 57 and escape from dispenser 50 through vent hole 58.
  • Figure 7 is a schematic, sectional elevation view of another exemplary dispenser of the present invention which functions in a manner very similar to dispenser 50 of Figure 6.
  • Dispenser 70 is preferably immersed in body of liquid 20 such that first elevation A (the level of body of liquid 20 during quiescent periods) is between vent hole 78 and level E, the upper edge of second cavity 73.
  • Cake 72 in first cavity 71 is preferably a material which slowly dissolves in water to provide hypochlorite ion to solution 81 which is contained in internal reservoir 85.
  • Bubbles 89 which move into first passageway 75 collect in gas-lock means (inverted, generally u-shaped section) 82 of first passageway 75 and establish gas-lock 84 which isolates solution 81 in dispenser 70 from body of liquid 20. Bubbles E9 which move into third passageway 74 rise through solution 81 into second passageway 77 and out vent hole 78.
  • FIG 8 is a schematic, sectional elevation view of another exemplary dispenser of the present invention.
  • Dispenser 90 is preferably immersed in body of liquid 20 such that a portion of first cavity 91 containing cake 92 is below the level of first elevation A of body of liquid 20 (the level of body of liquid 20 during quiescent periods). Vent hole 98 is preferably above first elevation A.
  • Cake 92 preferably dissolves slowly in water to provide hypochlorite ion to solution 101 which is contained in internal reservoir 105.
  • first elevation A to second elevation C which is preferably below the level of first (inletldischarge) passageway 95
  • solution 101 flows from internal reservoir 105 of dispenser 90 into body of liquid 20.
  • the level of solution 101 in dispenser 90 drops from approximately the level of first elevation A to approximately the level of horizontal, transversely extending surface 106. Later, as the level of body of liquid 20 rises to first elevation A, liquid 5 from body of liquid 20 is admitted to reservoir 105 through passageway 95.
  • first passageway 95 a continuum of liquid/ solution bridges inverted, generally u-shaped section 102 of inletldischarge (first) passageway 95.
  • gas bubbles 109 generated in first passageway 95 collect and coalesce along horizontal transverse surface 106. Such bubbles eventually move either up first passageway 95 into first cavity 91 and out vent hole 98, or into gas-lock means (inverted, generally u-shaped section) 102 which is a passive means for providing gas-lock 104 in first passageway 95.
  • Gas bubbles 109 generated in first cavity 91 pass from dispenser 90 through vent hole 98.
  • first passageway 95 of dispenser 90 Because the volume of first passageway 95 of dispenser 90 is generally small, it can take a long period of time for solution 101 in first passageway 95 to generate sufficient gas bubbles 109 to establish gas-lock 104. This will, of course, depend on the rate of gas generation of solution 101.
  • FIG 9 is a schematic, sectional elevation view of another exemplary dispenser of the present invention.
  • Dispenser 110 is preferably immersed in body of liquid 20 such that first elevation A (the level of body of liquid 20 during quiescent periods) is between vent hole 118 and the top of opening 119.
  • Cake 112 in first cavity 111 is preferably a material which slowly dissolves in water to provide the cleansing, disinfecting, or other action desired of solution 121 which is contained in internal reservoir 125.
  • the level of body of liquid 20 drops from first elevation A to second elevation C
  • the level of solution 121 in dispenser 110 drops from approximately the level of first elevation A to approximately the level of reservoir-side opening 128 of first passageway 115.
  • Compartment 130 contains a gas generating means other than solution 121.
  • gas generating means is typically a material, e.g. solid material 131 (which may be, for example, a bicarbonate, peroxide, carbide, borohydride, etc.), which reacts slowly with liquid 5 and/or solution 121 to form a gas and generate gas bubbles 129.
  • Compartment 130 containing such a gas generating means preferably underlies at least a portion of reservoir 125.
  • the passive means for directing gas bubbles 129 toward gas-lock means 122 of first passageway 125 includes aperture 132 intermediate compartment 130 and reservoir 125.
  • Aperture 132 is preferably located directly beneath generally transversely extending surface 126 such that surface 126 intercepts gas bubbles 129 and directs them toward gas-lock means 122.
  • Transversely extending surface 126 is preferably inclined upwardly toward reservoir-side opening 128 of inletldischarge passageway 115. Bubbles 129 thus collect in gas-lock means (inverted, generally u-shaped section) 122 of first passageway 125 and establish gas-lock 124 which isolates solution 121 in dispenser 110 from body of liquid 20.
  • FIG 10 is a schematic, sectional elevation view of another exemplary dispenser of the present invention which functions in a manner very similar to dispenser 110 of Figure 9.
  • Dispenser 150 is preferably immersed in body of liquid 20 such that first elevation A (the level of body of liquid 20 during quiescent periods) is between vent hole 158 and opening 159.
  • Cake 152 in first cavity 151 is preferably a material which slowly dissolves in water to provide active ingredient to solution 161 which is contained in internal reservoir 165.
  • the level of body of liquid 20 drops from first elevation A to second elevation C
  • the level of solution 161 in dispenser 150 drops from approximately the level of first elevation A to approximately the level of reservoir-side opening 168 of first passageway 155.
  • Dispenser 150 has a gas generating means other than solution 161.
  • the gas generating means is contained in compartment 170.
  • the gas generating means preferably comprises solid material 171 (e.g. a bicarbonate, peroxide, carbide, borohydride, etc.) which reacts slowly with liquid 5 and/or solution 161 to generate gas and form gas bubbles 169. Gas bubbles 169 escape compartment 170 through aperture 172 between compartment 170 and reservoir 165.
  • Aperture 172 is located immediately beneath reservoir-side opening 168 of first passageway 155 such that gas bubbles 169 are directed to gas-lock means 162.
  • Gas bubbles 169 collect in gas-lock means (inverted, generally u-shaped section) 162 of first passageway 155 and establish gas-lock 164 which isolates solution 161 in dispenser 150 from body of liquid 20.
  • dispensers depicted and described herein provide an indication of the wide variety of designs that can provide the desired functions of the dispenser.
  • the preferred design is dependent on the gas generating means employed, particularly the rate of gas generation. It is preferred that dispensers of the present invention be designed such that, in any passageway which provides fluid communication between the solution in the dispenser and the external body of liquid, a gas-lock is established within about 50 hours, more preferably within about 20 hours, more preferably'still within about 8 hours.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
EP85200853A 1984-06-08 1985-05-29 Passiver Dosierverteiler, bei dem eine intern erzeugte eingeschlossene Gasblase einen Produktabschluss bewirkt Withdrawn EP0168075A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61862284A 1984-06-08 1984-06-08
US618622 1984-06-08

Publications (1)

Publication Number Publication Date
EP0168075A1 true EP0168075A1 (de) 1986-01-15

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EP85200853A Withdrawn EP0168075A1 (de) 1984-06-08 1985-05-29 Passiver Dosierverteiler, bei dem eine intern erzeugte eingeschlossene Gasblase einen Produktabschluss bewirkt

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EP (1) EP0168075A1 (de)
JP (1) JPS6157726A (de)
CA (1) CA1287948C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528073A1 (de) * 1989-11-30 1993-02-24 Sara Lee/DE N.V. Dosiervorrichtung für einen Toiletten-Wasserkasten
EP0413373B1 (de) * 1989-07-27 1993-03-03 Unilever N.V. Vorratsbehälter mit verzögerter Freigabe
US5774903A (en) * 1991-05-20 1998-07-07 Sara Lee/De N.V. Device for dispensing a chemical composition into a toilet tank

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0647831B2 (ja) * 1986-06-24 1994-06-22 花王株式会社 薬剤分配容器
JPH0577457U (ja) * 1992-03-24 1993-10-22 東陶機器株式会社 浴室内照明装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171546A (en) * 1977-10-21 1979-10-23 The Procter & Gamble Company Passive dosing dispenser
US4208747A (en) * 1978-04-18 1980-06-24 The Procter & Gamble Company Passive dosing dispenser employing trapped air bubble to provide air-lock
US4216027A (en) * 1978-04-18 1980-08-05 The Procter & Gamble Company Method and apparatus for cleansing and disinfecting a flushing toilet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4171546A (en) * 1977-10-21 1979-10-23 The Procter & Gamble Company Passive dosing dispenser
US4208747A (en) * 1978-04-18 1980-06-24 The Procter & Gamble Company Passive dosing dispenser employing trapped air bubble to provide air-lock
US4216027A (en) * 1978-04-18 1980-08-05 The Procter & Gamble Company Method and apparatus for cleansing and disinfecting a flushing toilet
US4208747B1 (de) * 1978-04-18 1983-08-16

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413373B1 (de) * 1989-07-27 1993-03-03 Unilever N.V. Vorratsbehälter mit verzögerter Freigabe
EP0528073A1 (de) * 1989-11-30 1993-02-24 Sara Lee/DE N.V. Dosiervorrichtung für einen Toiletten-Wasserkasten
US5774903A (en) * 1991-05-20 1998-07-07 Sara Lee/De N.V. Device for dispensing a chemical composition into a toilet tank

Also Published As

Publication number Publication date
JPH0542531B2 (de) 1993-06-28
JPS6157726A (ja) 1986-03-24
CA1287948C (en) 1991-08-27

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