Fluid handling – Systems – Flow path with serial valves and/or closures
Reexamination Certificate
1998-11-09
2001-08-07
Shaver, Kevin (Department: 3754)
Fluid handling
Systems
Flow path with serial valves and/or closures
C222S325000, C222S380000, C222S501000, C251S149600
Reexamination Certificate
active
06269837
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a rechargeable dispensing system, and more particularly, to a rechargeable laundry treatment dispensing system for accurately dispensing relatively large doses of a highly viscous liquid, and more particularly, for dispensing an anhydrous thick cream-like product having at least 40% suspended solids with minimal effort and with minimal residual left within the dispensing container.
BACKGROUND OF THE INVENTION
Traditional laundry cleaning packaging consists of a variety of configurations. For granular detergents, the most common packaging is a paperboard carton with a scoop dispenser. For liquid detergents, there are several conventional packaging configurations including a bottle having a dosing cap, a squeeze bottle with top-mounted nozzle, a bottle having a top-mounted dip tube piston pump or sprayer and a refillable package.
For liquid detergents, the use of a scoop is very messy, particularly for a new type of anhydrous (solvent-based) thick cream-like laundry detergent product having at least 40% suspended solids and a specific gravity of 1.2 which is too thick to pour accurately using most conventional packaging. In sizes greater than 1.5 liter, the combination of the large volume and the product's weight make a squeeze bottle non-feasible for the thick cream-like product because it is too heavy to lift and simultaneously squeeze through a nozzle. Furthermore, the highly viscous product is expensive and cannot be exposed to water prior to use.
The top-mounted, dip tube piston pump dispenser is more feasible to use than squeezing or pouring different types of liquid detergent because it permits the user to accurately dispense the product without lifting the dispenser. However, the top-mounted, dip tube pump is undesirable for at least two reasons. First, the dip tube leaves product residuals at the bottom of the container, thus wasting product and enticing the user to introduce water into the container to remove the residual. Second, due to the properties of the highly viscous product, the product adheres to all conventional packaging materials.
For example, regarding the top-mounted, dip tube piston pump, the product will adhere to the dip tube and container causing product waste. Furthermore, this type of package requires either additional pump strokes to prime the pump or significant force by the user to dispense the required dose of the highly viscous product due to the product's adherence to the inside of the dip tube. Furthermore, due to the cost of a piston pump dispenser, it is advantageous to have a dispenser which reuses the dispenser while the liquid filled container is replaced.
Therefore, what is needed is a rechargeable dispenser capable of accurately dispensing relatively large doses of a highly viscous anhydrous product having at least 40% suspended solids with minimal effort and with minimal residual left within the container while reducing the possibility of water contamination.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved rechargeable dispensing system.
It is a further object to provide a rechargeable dispensing system for dispensing a liquid product, comprising a recharge container having a primary finish and a valve, a base having a receptacle for receiving the primary finish of the recharge container and a fluid connector located within the base and attached to the receptacle, a locking mechanism for securing the recharge container to the base, wherein the valve is in a closed position when the locking mechanism is engaged and the valve is in an open position when the locking mechanism is disengaged, and a pump attached to the base in open communication with the recharge container along the fluid connector for dispensing the liquid product from the recharge container.
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Arent Lee Mathew
Gaw Chinto Benjamin
Oder Reuben Earl
Stahley Robert Edward
Bastianelli John
Cook C. Brant
Miller Steven W.
Shaver Kevin
The Procter & Gamble & Company
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