JPH0560395B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to wet shaving, and more particularly to so-called wet shaving type safety razors.

More specifically, the present invention relates to a wet shaving safety razor that includes a shaving aid incorporated or attached in some manner to the razor.

Typically, the shaving aid is incorporated into one of the facial surfaces of the razor cartridge, ie, the cap or guard bar.

Conventional razors incorporating shaving aids in the cap or guard bar are disclosed in U.S. Pat. ``Safety Razor Combined with a Skin Soap Dispenser''.

U.S. Pat. No. 4,170,821 uses a shaving aid in the form of polyethylene oxide along with other devices incorporated into the razor cartridge in several ways.

British Patent No. 1157640 shows a spongy strip impregnated with a hair softener attached to the top of the razor.

Italian Patent No. 991064 shows a soap dispenser mounted in front of the cutting edge.

The object of the present invention is to provide a safety razor cartridge for wet shaving, which incorporates a shaving aid in the face contact surface of the cartridge cap, comprising:
The aim is to provide a cartridge whose structure and manufacturing method are suitable for modern high-speed mass production systems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shaving aid receptacle that allows the incorporation of a shaving aid into a low cost disposable razor in a highly competitive manner, and to incorporate the aid into said receptacle with sufficient manufacturing speed and economy. is to give a way to insert it.

The present invention provides a method for attaching an elongated solid shaving aid insert to a facial contact surface of a razor cartridge, comprising the steps of: (a) forming a track in the face contact surface and having an opening widening to the entrance side of the track; (b) forming said elongated shaving aid insert and forming said shaving aid insert with said shaving aid insert, creating spaced constraints by bulges and forming a stop opposite said inlet; (c) frictionally retaining the shaving aid insert within the track; and (c) frictionally retaining the shaving aid insert within the track. .

Referring in detail to the drawings, reference numeral 11 designates a low cost disposable razor having a handle 12 and a cartridge 13 (removed from and attached to the handle in a known manner).

The cartridge includes a face surface 14 in which a groove 16 is formed which defines a receptacle for a shaving aid insert 17.

The groove is open at the end and defines a track for receiving a shaving aid insert 17 fed from the left end as shown in FIGS. 4 and 5.

To assist in retaining the insert within the track, spaced clips 18, 19 (in this case integrally molded with the cartridge) overhang the track and project mutually from opposite sides of the track. It is formed on the surface 14. Although the disclosed embodiments of the invention show mutually opposing clips,
It does not necessarily have to be arranged like that. The clips can also be staggered, that is, alternately protruding from opposite sides.

Clips 18 and 19 are placed in the area of clips 18 and 19.
A bulge 22 (see FIG. 6) cooperating with 19 is formed in the bottom wall 21 of groove 16, which serves two important purposes.

First, the inlet side of the bulge provides a flared opening creating an entry point for insertion of the shaving aid, as indicated by numeral 23 in FIGS. 5 and 6.

Second, clips 18, 19, alone or in pairs, cooperate with mating bulges 22 to create a frictional force that retains the shaving aid insert.

As previously mentioned, the clips 18, 19 need not be arranged in opposing pairs as shown in FIG. 7, but can be staggered as they extend from opposite sides of the track.

Furthermore, the number of clips and the number of bulges are a matter of choice, so long as there is sufficient constraint to create a suitable frictional force between the cooperating clips and the mating bulges to retain the insert.

It is often desirable to make a stop at the end of the track opposite the inlet end, as shown at 24 in FIG. 4, to prevent over-advancement of the shaving aid insert.

FIG. 2 shows an elongated shaving aid 26 of variable length made by extrusion, injection molding, or the like.

FIG. 3 shows the separation of elongate aid 26 into individual inserts 27, 28, 29. These inserts are shown feeding into the rail in FIGS. 4 and 5, and there is a schematic representation of the insert 17 illustrated in cross section in FIG.

Without departing from the spirit and scope of the invention,
It is anticipated that various embodiments and modifications may be made to the disclosed and claimed invention.

For example, there are numerous shaving cartridges that can be constructed for wet razor cartridges in accordance with the apparatus and method claims herein.
It is expected that there is an aid or its composition.

Equipment design considerations may require that the feed side of the insert be reversed and therefore the overadvance stop reversed.

Additionally, it may be necessary to provide stops at each end of the groove to prevent the insert from slipping out of the groove due to vibrations caused during transportation of the razor product in commerce.

[Brief explanation of drawings]

1 is a perspective view of a razor cartridge with a shaving aid insert attached; FIG. 2 is an enlarged perspective view of a shaped shaving aid of variable length; FIG. 3 shows the elongated aid of FIG. 2 as a separate insert; In other words, a diagram similar to Figure 2 showing the division into shaving aid units,
Figure 4 is an enlarged top view showing the shaving aid insert partially received in the insert receiver; Figure 5 is a vertical cross-sectional view of Figure 4 taken along the offset line 5--5; FIG. 7 is an enlarged view of a portion of FIG. 5 showing a bulge in the bottom wall of the aid receiver, and FIG. 7 is an enlarged sectional view taken along line 7--7 of FIG. 11...Razor, 12...Handle, 13...
... Cartridge, 17... Shaving aid insert.

Claims (1)

[Scope of Claims] 1. A method for attaching an elongated solid shaving aid insert to a face contact surface of a razor cartridge, comprising: (a) forming a track in the face contact surface and widening the track toward the entrance side; (b) forming said elongated shaving aid insert and forming said shaving aid insert with a bulge forming spaced restrictions and a stop opposite said inlet; A method of making a razor cartridge comprising: inserting an insert into said track and abutting a stop opposite said inlet; and (c) frictionally retaining said shaving aid insert within said track. . 2. Claim 1, wherein the shaving aid insert is formed by extrusion.
Section method. 3. The method of claim 1, wherein said track is assisted by a plurality of spaced clips formed on said face-abutting surface. 4. The method according to claim 3, wherein the clip is located corresponding to the portion of the rail bulge. 5. The method of claim 3, wherein said plurality of spaced apart clips form pairs, with each pair of clips projecting toward each other from opposite sides of said track.