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Publication numberUS3115270 A
Publication typeGrant
Publication dateDec 24, 1963
Filing dateAug 6, 1962
Priority dateAug 6, 1962
Publication numberUS 3115270 A, US 3115270A, US-A-3115270, US3115270 A, US3115270A
InventorsZachary Melnikoff
Original AssigneeZachary Melnikoff
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Reservoir seal for semi-fluent materials
US 3115270 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Dec. 24, 1963 2. MELNIKOFF RESERVOIR SEAL FOR SEMI-FLUENT MATERIALS Filed Aug. 6, 1962 INVENTOR. ZACA AEJ MEL/V/KQ WK/4&4

United States Patent Ofi'ice 3,115,270 Patented Dec. 24, 1963 3,115,270 RESERVOIR SEAL FOR SEMI-FLUENT MATERIALS Zachary Melnikoff, 351 S. Fuller Ave., Los Angeles 36, Calif. Filed Aug. 6, 1962, Ser. No. 215,112 Claims. (Cl. 220-60) This invention relates to a dispenser of semi-fluent materials, such as mascara, and particularly to a mascara reservoir non-leakable seal which does not use glues, cements, or other adhesives.

The usual mascara dispenser is composed of two main parts, namely, a reservoir shell for holding the mascara material and a handle to which an applicator rod and brush are attached. A plug seals the open end of the reservoir shell, the plug having a central opening through which the rod and brush passes. The handle is internally threaded, and when unthreaded is removed with the desired amount of mascara material on the brush. After use, the brush is inserted back in the reservoir and the handle threaded to [the plug. The rod and a resilient washer in the opening in the plug seals the opening.

In the past, it has been necessary to use glues and cements of different kinds to prevent the mascara material, which is semi-fluent, from leaking between the walls of the reservoir and the plug. Since the dispenser reservoir shell is made of plastic materials, a force fit therebetween has been found insufiicient to hold the material within the reservoir. This occurs because of the fatigue of the plastic under pressure. The present invention has been found to permit a force fit to be used, the necessary contact pressure to prevent leakage being maintained at all times. 1

The principal object of the invention, therefore, is to facilitate the closure of a reservoir containing semi-fluent materials.

A further object of the invention is to provide an improved, non-leakable seal for a resilient reservoir for semi-fluent materials.

Another object of the invention is to provide an improved, air-tight seal for a plastic shell subject to pressure fatigue to prevent leakage of a semi-fluent material from the shell.

A better understanding of this invention may be had from the following detailed description when read in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of a mascara dispenser embodying the invention;

FIG. 2 is a view, partly in cross-section, taken along the line 22 of FIG. 1;

FIG. 3 is an enlarged detail view of the seal embodying the invention; and 1 FIG. 4 is a cross-sectional view taken along the line 4-4 of FIG. 2.

Referring, now, to the drawings in which the same numerals identify the same elements, a mascara dispenser unit includes a reservoir shell section 5 and a handle section 6. These units are generally of a plastic material. At the open end of the reservoir shell 5 is a plug unit composed of a cylinder 8, a wiper 9, and a metallic cylin der with a right angle flange 11 which holds the wiper 9 against the plug 8. The plug 8 has an annular ring 14 thereon which is slightly larger in diameter than an annular groove 15 in the shell 5, the plug 8 and shell 5 being maintained in fixed axial position by this ring and groove combination 14-15, the plug 8 being forced into the shell 5 to the position shown in FIGS. 2 and 3.

The handle 6 has attached thereto a rod 20 on the end of which is a coil wire 21 to which spiral bristles 22 are attached. The handle '6 is threaded on the plug 8 as shown by the threads 24 in FIG. 3.

The reservoir 5 contains semi-fluent mascara material 26 which is collected on the bristles 22, the brush then being removed past the wiper 9 which will remove any excess mascara material.

1111 was found that the difference in diameters of the ring and groove combination 1415 provided sufficient pressure to prevent leakage when the dispenser was assembled. However, because of fatigue of the plastic under pressure, the contact pressure was decreased and leakage occurred as air entered the reservoir. Various glues and cements were then used to seal the plug 8 in the open end of the mascara material reservoir, but because of fatigue and the nature of the mascara material, leakage still occurred.

The present invention permits a simple ring and groove seal for plastic reservoirs to provide an air-tight assembly which will prevent leakage over the lifetime of the dispenser. This is accomplished by surrounding the plastic end of the shell opposite the groove 15 with a nonexpandable metallic ring 30 which prevents any expansion of the open end of the reservoir from fatigue. Thus, it is a simple assembly operation to slip the ring 30 into the recess 31 and press the plug 8 into the open end of the reservoir so that the ring 14 is accommodated in the groove 15, the resiliency of the plug and shell permit-ting the assembly. The outer surface of the ring 30 is flush with the outer surface of the shell 5 to provide a smooth outer surface. This reinforcement of the open end of the plastic shell maintains a sufliciently tight contact between the surface of the ring 14 and the surf-ace of the groove 15 to prevent leakage of the contents of the reservoir over the normal lifetime of (the dispenser.

I claim:

1. A seal construction between the open end of a plastic reservoir and a plastic closure element for said reservoir comprising an annular internal groove in and adjacent to the open end of said reservoir, an external annular ring on said closure element of said reservoir and adapted to be accommodated in said groove when said reservoir and said closure element are forced together, and a non-expandable external band around said open end of said reservoir opposite said groove therein.

2. A seal construction in accordance with claim 1 in which said closure element is plastic and said band is metal of suificient thickness to prevent expansion thereof, a recess being provided on the outer surface of said open end of said reservoir for accommodating said band.

3. A seal construction in accordance with claim 1 in which said annular ring has a slightly larger diameter than said annular groove, the resiliency of said plastic of said reservoir and said closure element permitting the interlocking of said ring and groove under pressure.

4. A seal for a plastic reservoir for semi-fluent material comprising a hollow cylinder closed at one end and open at the other, said cylinder being a reservoir for semi-fluent material such JaS mascara, the open end of said cylinder having an internal annular groove therein adjacent the open end thereof and an internal recess adjacent said open end and opposite said groove, a plastic plug having an external annular ring adapted to be accommodated in said groove when said plug is forced into said open end, and a non-expandable metal band in said recess, said band being of sufiicient thickness to prevent expansion thereof.

5. A seal in accordance with claim 4 in which said annular ring has a slightly greater diameter than the internal diameter of said groove, the resiliency of said plastic of said cylinder and said plug permitting the interlocking of said ring and groove under pressure.

References Cited in the file of this patent UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2573111 *Jul 19, 1948Oct 30, 1951Irving RossiBottle cap
US2718980 *Oct 2, 1951Sep 27, 1955Robinson William HContainer seal
US2753991 *Feb 17, 1951Jul 10, 1956Sherman Claudine ReineLipstick refill cartridge
US3066834 *Feb 24, 1960Dec 4, 1962Electrolube LtdDispensers for liquids or powders
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3259266 *Jan 6, 1964Jul 5, 1966Dykem CompanyClosures for fluid containers
US4526273 *Nov 21, 1983Jul 2, 1985Pola Chemical Industries, Inc.Portable cosmetics case
US5324128 *Jul 15, 1992Jun 28, 1994L'orealSpill preventing cosmetic applicator
US5782568 *Jan 24, 1995Jul 21, 1998Schwan-Stabilo Cosmetics Gmbh & Co.Application system
US6099183 *Oct 15, 1999Aug 8, 2000L'orealMake-up brush and method for manufacturing such a brush
US6227735 *Aug 10, 1995May 8, 2001L'orealMake-up brush and method for manufacturing such a brush
US6296411Jan 5, 2001Oct 2, 2001L'orealMake-up brush and method for manufacturing such a brush
US6299370Jan 5, 2001Oct 9, 2001L'orealMake-up brush and method for manufacturing such a brush
US6299371Jan 5, 2001Oct 9, 2001L'orealMake-up brush and method for manufacturing such a brush
US6305862Jan 5, 2001Oct 23, 2001L'orealMake-up brush and method for manufacturing such a brush
US6309123Jan 5, 2001Oct 30, 2001L'orealMake-up brush and method for manufacturing such a brush
US6325562Jan 5, 2001Dec 4, 2001L'orealMake-up brush and method for manufacturing such a brush
US6331086Jan 5, 2001Dec 18, 2001L'orealMake-up brush and method for manufacturing such a brush
US6345923Jan 5, 2001Feb 12, 2002L'orealMake-up brush and method for manufacturing such a brush
WO1991001097A1 *Jul 19, 1990Feb 7, 1991Lvmh RechMake-up device, particularly for eyelashes
WO1993001734A1 *Jul 15, 1992Feb 4, 1993OrealApplicator assembly for liquid, particularly cosmetic, composition
WO1999053797A1 *Apr 12, 1999Oct 28, 1999Color Access IncUnidirectional cosmetic wiper
Classifications
U.S. Classification220/780, 220/643, 401/122, 401/129
International ClassificationA45D40/26
Cooperative ClassificationA45D40/267
European ClassificationA45D40/26C2A