1. Technical Field
The present invention relates to shaving devices that include apparatus for dispensing liquid or gel shaving aid material in general, and to shaving devices that include the aforesaid apparatus within a razor cartridge portion of the shaving device in particular.
2. Background Information
Conventional safety razors typically include a disposable razor cartridge mounted in a reusable handle, or a handle and cartridge combined into a unitary disposable unit. Most razor cartridges include a frame, at least one razor blade, and a strip of shaving aid material attached to the frame. Shaving aid materials include, but are not limited to lubricating agents, drag reducing agents, depilatory agents, cleaning agents, medicinal agents, and the like that enhance the shaving process. The strip of shaving aid material is typically attached to the razor cartridge adjacent to the razor blade(s). An additional shaving aid material (e.g., a shaving cream) is also typically used with the razor cartridge.
Shaving aid material strips typically comprise a water-soluble material that is intended to be dispensed during the act of shaving, and a water-insoluble material that is not intended to be dispensed during shaving. The water-insoluble material provides a medium for supporting and/or holding the water-soluble material. An example of a water-insoluble material is a polystyrene, and an example of a water-soluble material is a polyox-type material. Both of these types of materials are well known in the art.
Several disadvantages are often associated with some shaving aid strips. For example, the useful life of shaving aid strips can vary significantly depending on the shaving habits of the user, and the environment in which the razor cartridge is being used and/or stored. The amount of shaving aid material being dispensed can also vary over the life of the shaving device. Consequently, an initially adequate dispersion rate may subsequently become inadequate. In addition, the types of shaving aid material that can be dispensed in a shaving aid strip are limited.
Therefore, it would be desirable to provide a shaving device that overcomes these shortcomings in the art.
According to the present invention, a shaving device includes a handle and a razor cartridge. The razor cartridge includes one or more razor blades and a reservoir. A liquid material storage element is disposed within the reservoir. A dispensing medium extends between the liquid material storage element and an outer surface of the razor cartridge. A contact end of the dispensing medium is disposed adjacent the outer surface. The dispensing medium is operable to draw a liquid stored within the liquid material storage element, through the dispensing medium, and to the contact end. In some embodiments, the reservoir also includes a selectively removable lid.
According to an aspect of the present invention, a replacement razor cartridge for use with a handle includes one or more razor blades, a reservoir, a liquid material storage element, and a dispensing medium.
According to another aspect of the present invention, the liquid storage medium is either itself a replaceable cartridge, or is contained within a replaceable cartridge, that engages with the razor cartridge.
An advantage of the present invention is that the shaving device of the present invention provides a user with a selectively renewable source of shaving aid.
Another advantage of the present invention is that the shaving device is that a single shaving device is adaptable to being used with a wide variety of shaving aids.
Another advantage of the present invention is that the surface to be shaved can be coated with a pre-shave, mid-shave, or post-shave preparation to facilitate the shaving process, and increase the comfort of the shaving process.
Another advantage of the present invention is that a shaving aid delivery system is provided that is operable at all angles and positions. Shaving aid can be supplied to the skin surface even if the razor assembly is upside-down, tilted to one-side, or in any unusual position, at least until the supply of liquid shaving aid preparation is completely depleted.
These and other objects, features, and advantages of the present invention will become apparent in light of the detailed description of the present invention.
Referring now to
Now referring to the embodiments shown in
Referring to
A liquid shaving aid material 22 is distributed within the liquid material storage element 20. The liquid 22 may be distributed in the liquid material storage element 20 prior to placing the liquid material storage element 20 into the reservoir 18. Alternatively, the liquid material storage element 20 may be placed in the reservoir 18 and the liquid 22 then distributed in the liquid material storage element 20. For example, inserting a needle into the liquid material storage element 20 and injecting the liquid 22 is one acceptable method. Acceptable liquid shaving aid materials 22 include, but are not limited to, lubricating agents, drag reducing agents, depilatory agents, cleaning agents, medicinal agents, soap materials, and the like, including combinations thereof, that enhance the shaving process.
Referring to
In other embodiments of the present invention, the dispensing medium 24 includes a wick 34 made of fibrous, porous, sintered plastic, or similar type material. Specific examples of dispensing medium are provided infra. In these embodiments, the razor cartridge 12 includes at least one aperture 36 within an outer surface 38 of the razor cartridge 12 (as shown in
Referring to
Referring to the embodiments shown in
The present invention is described above in terms of a shaving device 10 having a razor cartridge 12 and a handle 14. In some applications, the razor cartridge 12 is releasably attached to the handle 14 to permit the handle 14 to be used more than once with different razor cartridges 12.
Now referring to the embodiments shown in
A liquid material storage element 20 that stores the liquid shaving aid material 22 is provided in the reservoir 18, preferably substantially filling the interior volume thereof. The liquid material storage element 20 communicates with a dispensing medium 24 mounted in the razor cartridge 12, and, in combination, they provide a structure operable to deliver liquid shaving aid material 22 to the user's skin. The liquid material storage element 20 may be a fibrous structure forming a porous strip with pore sizes of about 5 to 120 microns and pore volumes of about 25%-95%. Porous polymers such as polypropylene or other polyolefin binders, oriented polyester, or other fiber component blends are examples of acceptable storage element materials. The fibers forming the strip can be treated to provide for hydrophobic or hydrophilic surface reactivity.
The dispensing medium 24 is disposed in a slot 60 in the razor cartridge 12 so that a first portion 62 projects outwardly from the razor cartridge 12 to expose the dispensing medium 24 to the user's skin during a shaving operation. A second portion 64 of the dispensing medium 24 extends into the reservoir 18 and communicates with the liquid material storage element 20. The dispensing medium 24 can itself be constructed of a shaving aid material, which, in combination with the absorbed liquid shaving aid material 22, can be applied to the user's skin during shaving. Examples of acceptable dispensing medium 24 materials include porous or other capillary-type material such as high-density polyethylene (HDPE), polytetrafluoroethylene (PTFE), ultra-high molecular weight polyethylene (UHMW), nylon6 (N6), polypropylene (PP), polyvinylidene fluoride (PVDF), polyethersulfone (PES), or other polymer formulations, as well as porous metals, ceramics, membranes or other filtration materials. Alternatively, the dispensing medium 24 can be a fibrous structure.
As shown in
Liquid shaving aid material 22 is applied to the user's skin surface by contact between the dispensing medium 24 and the skin surface during a shaving operation. The rate at which the shaving aid is delivered to the user's skin surface is controlled, in part, by the size of capillary voids in the dispensing medium 24, the volume of the dispensing medium 24, and the viscosity, surface tension and wetting or spreading coefficient (creep) of the liquid shaving aid material 22.
In an alternate design shown in
In some embodiments, one or more seals 78 are used to inhibit or prevent evaporation of shaving aid material 22 from the reservoir 18.
The location and position of the dispensing medium 24 on the razor cartridge 12 can be changed to suit different applications.
The dispensing medium 24 preferably extends across the width of the razor cartridge 12 so as to maximize the area over which shaving aid material 22 may be applied. The first portion 62 of the dispensing medium 24 need not be a continuous structure as shown in
In some embodiments, the shaped members 80 are operable to meter the amount and position of shaving aid material 22 flow. For example, the flow of shaving aid material 22 can be controlled by the volume, cross-section and surface area of the shaped members 80, the number of shaped members 80, and the arrangement of the shaped members 80. Shaped members 80 can be used to connect the dispensing medium 24 to several partitioned reservoirs 18a, 18b (see
The liquid material storage element 20 of the present invention may be replaceable within the razor cartridge 12 after the supply of liquid shaving aid material 22 in the reservoir 18 has been depleted. For example, as shown in
The amount of shaving aid material 22 provided with the liquid material storage element 20 may correlate to the expected life of the razor blades 16 so that when the supply of liquid shaving aid material 22 is exhausted, the user will know that the blades 16 are worn and the razor cartridge 12 needs to be replaced. Several methods of gauging the supply of liquid shaving aid material 22 may also be used with the present invention; e.g., a transparent reservoir 18, a sight glass 90 incorporated into the reservoir design, a colored shaving aid material 22, electrical circuitry that detects the reduction of conductivity of the absorbent material indicative of depletion of the shaving aid material, etc.
In order to prevent the artificial evaporation of the liquid shaving aid material, a protective film or cover 92 (see
In operation, the shaving device 10 is brought into contact with the surface to be shaved. As the user moves the shaving device 10 along the surface, the dispensing medium 24 draws liquid shaving aid material 22 from the liquid material storage element 20 in the reservoir 18. The liquid is drawn through the dispensing medium 24, to the contact end 32 (or first portion 62), where the liquid 22 is then applied to the surface being shaved adjacent to the cutting edge(s) 28. Simultaneously, as the user moves the shaving device 10 across the surface, the cutting edge(s) 28 of the razor blade(s) 16 shave undesired hair from the area.
After repeated use and upon expending at least a portion of the liquid 22 distributed in the liquid material storage element 20, the user may distribute additional liquid 22 into the liquid material storage element 20 disposed in the reservoir 18. Alternatively, the user may replace the liquid material storage element 20 in the reservoir 18 with a new liquid material storage element 20 (e.g., cartridge 86) containing liquid shaving aid material 22.
Although this invention has been shown and described with respect to the detailed embodiments thereof, it will be understood by those of skill in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. The present invention is not, therefore, intended to be limited to the particular embodiments disclosed in the above detailed description, but that the invention will include all embodiments falling within the scope of the appended claims.
This application is entitled to the benefit of and incorporates by reference essential subject matter disclosed in U.S. Provisional Patent Application Nos. 60/512,475 and 60/512,474, both filed on Oct. 17, 2003.
Number | Date | Country | |
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60512475 | Oct 2003 | US | |
60512474 | Oct 2003 | US |