Coating implements with material supply – Projectable and retractable tool – Projection by movement of implement
Patent
1981-06-19
1984-09-11
Bratlie, Steven A.
Coating implements with material supply
Projectable and retractable tool
Projection by movement of implement
401101, 401272, 401274, A46B 1100
Patent
active
044707150
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a liquid applicator, comprising a liquid reservoir accommodated in an inner space of a strong envelope and a liquid outlet provided with dosing means.
Such an applicator is known from German Patent Application No. 2,425,062 laid up for public inspection for dispensing polish, particularly nail polish. The dosing means may be of various types and may comprise a spreading member of rubber or a pencil. An applicator of the kind set forth is furthermore known as a fountain-pen holder. Particularly in those cases in which the amount of liquid to be dosed is small and rapidly hardens and/or dries up, it is quite troublesome when the liquid emerges in an excessive amount and/or at inconvenient instants and/or dries up in the liquid outlet or hardens in any other way. The problem of correct dosing is particularly serious in those cases in which the applicator is disposable and the dosing means must have a low cost.
The invention solves the above mentioned problems in that the liquid reservoir is formed by a bag and in that the same pressure prevails in the inner space of the envelope as on the outer side of the liquid outlet. The invention is based on the recognition of the fact that the emergence of the liquid at an inconvenient instant and/or beyond the desired extent is frequently due to a pressure difference between the pressure prevailing in the reservoir and that outside thereof, which disturbs the operation of the dosing means. The steps taken in accordance with the invention ensure that the liquid in the reservoir is subjected to atmospheric pressure.
The invention is particularly important when the dosing means comprise a spreading member which is movable between a rest position, in which it is drawn into the liquid outlet and a working position, in which it is exposed out of the liquid outlet. The fluid, for example, glue or polish, must not harden or dry up in the said rest position so that the spreading member remains satisfactorily usable.
The invention will be described more fully hereinafter with reference to a drawing by way of example.
The drawing shows in:
FIGS. 1 and 7 each illustrate a side elevation partly broken away of a different embodiment of a polish applicator in accordance with the invention,
FIG. 2 is a side elevation partly broken away of detail II of FIG. 1,
FIG. 3 is a sectional view taken on the line III--III in FIG. 2,
FIG. 4 is a detail IV of the polish applicator of FIG. 1 in its working position,
FIG. 5 is an enlarged scale detail V of FIG. 3, and
FIG. 6 is a sectional view of a fountain-pen holder in accordance with the invention.
The dispenser/applicator 1 of FIG. 1, particularly intended for dispensing doses of polish, 2, particularly nail polish comprises a liquid reservoir arranged in an inner space 3 of an envelope or body 4 and a liquid outlet 7 provided with dosing means 6.
According to the invention the liquid reservoir is formed by a soft bag 5. It has two flanks 8, which are preferably thermally welded to outer sides 9 of a shoulder piece 10 connected with the liquid outlet 7 and having an eye-shaped cross-section (FIG. 3), the two outer sides 9 of which enclose two acute eye-corners 11. Preferably, these outer sides 9 extend substantially towards the interconnected parts 12 of the bag flanks 8 extending beyond the shoulder piece 10. The shoulder piece 10 together with an appreciable portion of the liquid outlet 7 and a collar 13 which is an integral portion of the nozzle made in the form of a single spray-casting of synthetic resin, preferably polyacrylonitril, which can satisfactorily adhere by hot-welding to the inner sides of the bag flanks 8 of the same synthetic resin.
The body 4 may be formed by a shell 15, a neck 16 screwed thereon with the interposition of the collar 13 and a locking cap 17 screwed to the latter.
The dosing means 6 arranged in the tubular liquid outlet 7 extending through the collar 13 and the shoulder piece 10 comprise a steel ball 18 and a pencil 19. The pencil 19 has a metal stem 20 in which axial liquid channels
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Dekker Willem A.
Reuchlin Johan G.
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