Dispensing – With discharge assistant – Fluid pressure
Reexamination Certificate
2001-01-12
2001-12-04
Shaver, Kevin (Department: 3754)
Dispensing
With discharge assistant
Fluid pressure
C222S151000, C222S546000, C222S402130, C239S123000
Reexamination Certificate
active
06325256
ABSTRACT:
This invention pertains to aerosol adhesive containers and more particularly to an adapter means in combination with the aerosol container to enable multiple subsequent use of the aerosol adhesive container and overcome adhesive clogging in the container aerosol discharge valve.
BACKGROUND OF THE INVENTION
Fluid adhesives are marketed in aerosol containers pressurized with propellant self contained within the container. In use, adhesive under pressure emerges from the discharge valve directed toward the substrate to be adhered. By the nature of adhesive materials, ordinarily sticky and often viscous, the discharge valve frequently becomes plugged and otherwise difficult to use due to dried old adhesive material collecting and hardening inside and around discharge valve after use. Considerable effort must be exerted to dislodge the blocking adhesive, while sometimes the aerosol container must be discarded if the plugging becomes extensive. In essence, adhesive blocking in the container discharge valve after each use is a nuisance to the consumer and structural changes are necessary to prevent or overcome the blocking.
It now has been found that conventional aerosol container valves can be retrofitted with throw away plastic adapters which avoid adhesive plugging after each use of the adhesive container. The adapters are inserted into the discharge valve or nozzle of the aerosol container prior to use. The adapter means is maintained in place or may be removed after the adhesive is used to assure that the discharge nozzle is maintained open and unplugged and to prevent subsequent plugging and hardening of the adhesive in the container discharge valve. If the plastic adapter means of this invention becomes plugged after one or more uses, the adapter can be discarded and replaced with a new adapter means to once again maintain the container nozzle free of plugging adhesive. Meanwhile, the original container valve remains free of plugging by hardened adhesives. The plastic adapters are cheap and easy to manufacture, simple to use by merely inserting into the container discharge valve, and can be packaged with the aerosol container for easy access. In a preferred aspect of the invention, a plastic ring can be attached to the top of the aerosol container for holding adapters which can be expediently removed from the ring to replace the previous adapter means as needed. In preferred aspects of the invention, a hand activated trigger mechanism is attached to the aerosol container where the trigger mechanism contains a central opening to accommodate the container discharge valve and the adapting means of this invention. The trigger mechanism provides biased pressure on the discharge valve to facilitate dispensing of the adhesive from the aerosol container through the container discharge valve. These and other advantages of the invention will become more apparent by referring to the drawings and the detailed description of the invention.
SUMMARY OF THE INVENTION
Briefly, the invention pertains to an adapter means in combination with an aerosol container for discharging adhesives where the adapter means can be connected to an existing aerosol adhesive container having a discharge valve or nozzle. The adapter means comprises an interior sleeve insert in combination with an exterior dispensing tip for fitting within and engaging the existing discharge valve to prevent clogging of the discharge valve with adhesive after use. In a preferred aspect of the invention, a trigger mechanism is attached to, or otherwise locked onto the top of the aerosol container, where the trigger mechanism contains a central opening for accommodating the discharge valve protruding through the central opening along with the insert sleeve and exterior dispensing tip. The trigger mechanism is operative to bias the discharge valve along with the interior sleeve and exterior dispensing tip to activate discharging adhesive from the aerosol container in use.
REFERENCES:
patent: 4146152 (1979-03-01), Ogawa et al.
patent: 4408699 (1983-10-01), Stock
patent: 5154327 (1992-10-01), Long
patent: 5379927 (1995-01-01), Montenieri et al.
patent: 5549226 (1996-08-01), Kopp
patent: 6000633 (1999-12-01), Lund et al.
Kozlowski Edward
Liljeqvist Lance
Schmitz Thomas M.
Shaver Kevin
The Glidden Company
Willatt Stephanie L.
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