Assembly for filling canisters

Details Assembly for filling canisters Assembly for filling canisters

1999-04-05

2001-06-26

Kaufman, Joseph A. (Department: 3754)

Dispensing

With flow controller or closure

Reciprocatory

C222S561000, C222S563000, C251S339000, C251S358000

Reexamination Certificate

active

06250516

ABSTRACT:

BACKGROUND OF THE INVENTION
Presently, the filling of canisters with fluids, and especially the filling of antiperspirant/deodorant canisters with liquids, is done by metal to metal seals. While such filling enables volumetric filling, the system requires high sealing pressure and usually begins to leak after a few days of use, especially when the antiperspirant deodorant material contains a high proportion of solids.
More specifically, antiperspirant/deodorant liquids are today being filled into canisters through a metal tube or filling tube with an internal metal tip or plunger that seals to the inside of the tube. Such a filling method has the following disadvantages:
1) It is prone to splashing during the fill cycle.
2) High pressures (for example 60 psi) are required to seal the plunger; and
3) Dripping after filling often occurs and this is caused by wear in the metal to metal sealing mechanism due to the high proportion of solids in the fluid or liquid being filled.
The present invention relates to a device for controlling fluid or liquid flow into canisters, which eliminates the above-mentioned disadvantages of filling.
The following list of patents relates to known devices for controlling fluid or liquid flow.
The following is a list of U.S. Patents in this area of technology.
U.S. Pat. No. 5,016,867;
U.S. Pat. No. 4,363,429;
U.S. Pat. No. 5,537,335;
U.S. Pat. No. 5,183,075;
U.S. Pat. No. 5,137,187; and
U.S. Pat. No. 4,196,886.
SUMMARY OF THE INVENTION
The present invention relates to a device for filling canisters with fluids or liquids which comprises a metallic tip of a fill tube and an elastomeric dome assembly which is manipulated within that tip. While the elastomeric dome assembly is positioned above the metallic tip of the fill tube, fluid or liquid, flows from a nozzle, through the space between the elastomeric dome assembly and the metallic tip of the filling tube, filling the canister below. When the elastomeric dome assembly contacts the internal profile of the fill tube, it forms a seal, and thus stops the filling of fluid or liquid into the canister.
A low durometer elastomer capable of operating at high temperatures is used for the dome thereby reducing the pressure required to form a seal. When the elastomeric dome assembly contacts the internal profile of the fill tube the elastomer is deformed to accommodate the solid particles. Thus, wear is reduced and the integrity of the seal is maintained.
The invention also relates to a method for filling canisters with fluid or liquid which comprises using the device of the invention.


REFERENCES:
patent: 4196886 (1980-04-01), Murray
patent: 4363429 (1982-12-01), Schindler
patent: 4372467 (1983-02-01), Pritchitt
patent: 4525910 (1985-07-01), Boehmer
patent: 4537335 (1985-08-01), Rangwala et al.
patent: 5016687 (1991-05-01), Kawamura
patent: 5097993 (1992-03-01), Davis
patent: 5137187 (1992-08-01), Nichols et al.
patent: 5183075 (1993-02-01), Stein
patent: 5727776 (1998-03-01), Gerstenberger
patent: 5822958 (1998-10-01), Davis

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