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Disposable razor using piston movement for dispensing shaving materials
| Details |
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Inventors: McComas, James L.;
Assignee:
Primary Examiner: Yost; Frank T.
Assistant Examiner: Lin; Yu C.
Attorney, Agent or Firm: The Dulin Law Firm
An all in one disposable razor assembly comprising a hollow-shafted handle having a blade-attached razor head at a first end and an opening at a second, opposite end of the handle. The handle includes a central cavity therein with an elongated cavity lip disposed outside adjacent the open end of the hollow handle to receive a reservoir of stabilized shaving material in an amount sufficient for a single use. The cavity has disposed therein a dispensing assembly comprising a piston head and an attached towing cable for manually forcing the shaving material out of the hollow handle through the open end. In the preferred embodiment, the dispensing assembly includes a cap, initially attached to the elongated lip but easily releasable therefrom by pulling on an attached tear-away tab. Dispensing the shaving material is performed by releasing the cap and pulling the towing cable out of the cavity thereby moving the piston head from the blade-attached end to the open end, forcing the shaving material from the cavity into the user's hand. The cap is preferably attached by heat wherein the outer circumference of the cap is thermally back-welded to the underside of the cavity lip. An alternate embodiment provides for a reusable razor and shaving assembly wherein individual refill cartridges, each of which contains the above mentioned dispensing assembly and shaving material, may be repetitively inserted in the cavity of the handle. |
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DETAILED DESCRIPTION OF THE BEST MODE OF THE INVENTION The following is a detailed description of preferred embodiments of the present invention and is presented by way of example only and is not intended to limit its applicable principles.
Furthermore, the description is intended to clearly enable one skilled in the art to make and use the invention.
It also includes various adaptations, variations, alternatives and different uses of the invention including what is presently believed to be the best mode of carrying out the invention.
Referring to FIGS.
1-3, a disposable razor assembly 10 is shown that includes a handle 11 connected through an arcuate arm 12 to a razor head 13.
The razor head 13 is of conventional construction and includes two spaced apart metallic blades 14 (see FIG.
1).
Normally, the razor head 13 will be formed of injection-molded plastics material and the blades 14 will be embedded in the plastics material during the molding operation as conventional in the art.
In this regard, suitable plastics materials include polyethylene, polypropylene, polystyrene and polycarbonates.
Thereafter, the handle 11 can be drilled by a conventual drill bit or preformed during molding to provide a rigid cavity 16 (see FIG.
2 and 3) into which is pumped a stabilized shaving material generally at 17 along with certain elements of dispensing assembly generally indicated at 18.
In this application, the term "stabilized shaving materials" means a dispersion of soap, builders and air providing sufficient channeling along the length L of the handle 11.
By the term "sufficient" it is meant that air can pass from lip 20 after cap 21 has been removed, and thence along side wall 23 to far end wall 22.
In that way, as piston head 24 of dispensing assembly 18 is moved in the direction of arrow 25 via towing cable 26 attached to cap 21, the magnitude of back pressure of air acting opposite to arrow 25 is not substantial enough to hinder operations.
FIGS.
4-7 illustrate dispensing assembly 18 as well as shaving material 17 of the present invention in more detail
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