US3644991A

US3644991A - Shearhead assembly for mechanical shaver

Info

Publication number: US3644991A
Application number: US795889A
Authority: US
Inventors: Paul Kobler
Original assignee: Individual
Current assignee: Individual
Priority date: 1969-02-03
Filing date: 1969-02-03
Publication date: 1972-02-29
Anticipated expiration: 1989-02-28

Abstract

On a mechanical shaver with a shaving head comprising a plurality of removable shearheads, skin-stretching means and selective interengaging mounting means of said shaving head, said shearheads to present a prestretched skin to an adjoining shearhead.

Description

United States Patent Kobler Feb. 29, 1972 [54] SHEARED ASSEMBLY FOR 3,127,675 4/1964 Kobler ..30/34.2 MECHANICAL SHAVER 3,136,055 6/1964 Kobler et a1 ..1..30/34.2 X 3,290,775 12/1966 Tolmie ..30/34.2 I 1 Invent Kohl", 81 Femmofe Lynbmk, 2,725,625 12/1955 Muntz ..30/34.2

N.Y. l 1563 2 Filed: Feb. 3 19 9 Primary Examiner-Othell M. Simpson [21] App]. No.: 795,889 [57] ABSTRACT On a mechanical shaver with a shaving head comprising a plu- [52] US. Cl ..30/34.2 rality of removable shear-heads, skin-stretching means and [51] Int. Cl ..B26b 19/42 elective inter-engaging mounting means of said shaving head, [58] Field of Search ..30/34.2 said shearheads to present a prestretched skin to an adjoining shearhead.

[56] References Cited 1 7 Claims, 10 Drawing Figures UNITED STATES PATENTS MM r I 2,611,175 9/1952 110151 et al. ...,.30/34,2

Patented Feb. 29, 1972 I N VEN TOR. Paul Jlber SI-IEARIIEAD ASSEMBLY FOR MECHANICAL'SI-IAVER The present invention relates to one or more shearheads without a cutting surface, and in a similar shape of at least one of the adjoining shearheads mounted on an electrical and mechanical razor, to stretch the skin before it reaches the head with a cutting surface.

More particularly this invention relates to a skin stretcher in the shape of a shearhead without cutting at slots, so called a blind head. Such a blind head on a shaver, in similar shape to This least one of the adjoining shearheads and constituting a shearhead assembly of such a shaver, will not only stretch the skin for the following head, but will also shape the skin in the shape of the following shearhead in at least one shaving direction or motion of shaving procedure, or said blind head may shape the skin differently from the other adjoining shearhead-in case on one shearhead assembly are mounted shearheads of different shapes.

The prestretching of the skin, before the following head withits cutting surface opens the skin pores whereby a closer cutting off of the stubble near their roots is possible.

Another advantage of this invention is, that a blind head reduces skin irritation. The face to be shaved has many different curves and with such a blind head the skin area enters the cutting surface of the following cutting head without resistance, which is caused by great differences in the shape of the skin in the shaving area.

Another advantage of this invention is in the fact that small differences in the shape of shearheads on a head assembly may be beneficial in opening the skin pores in different ways, such a blind head may be placed between 2 cutting shearheads of slightly different shapes. The skin pores may then be stretched slightly upwards or downwards as the case may be. If at least one of the cutting shearheads is slightly lengthwise curved a combination with a blind head and two differently shaped cutting shearheads will stretch the skin in the'shaving operation forward and backward and through the curvature of a head also sideways to the left and right side, and through the difference in the height of an adjoining blind head also a stretching of the pores upwards or downwards is achieved.

So with a complete stretching of the skin pores with'the use of -a blind head, which avoids all irritation which may be caused by the slot entrances of a cutting head, a closer shave is possible.

Another advantage of this invention is, that with a head assembly of several heads the tendency at the neckline is to have the first head mostly somewhat lower than the nonsensitive area of the neckline, which causes easely a bad irritation there. This is avoided by having the first head replaced by a blind head and has proved to be in all experiments a very great advantage.

Where the other shearheads have the openings for cutting the hair, the blind head is completely solid on top and on the sides.

A different modification may be a blind head that is solid on top and has cutting openings on at least one side, with an inner cutter knife, like seen in the regular standard shearheads, said inner knife having such a shape that is cuts beneath the side openings of the blind head.

Another and very great advantage is the use of a blind head on a shaver head assembly when such a shaver is used for shaving the armpits of ladies, where the skin is so supersensitive, that it is almost impossible not to get an irritation there. The blind head as described in this application has given for this use the right solution as it stretches the skin in the armpit most effectively and most gently avoiding irritation. This is possible because this most sensitive skin area in the armpits is not shaved every day but only at longer interval, which gives the skin the necessary time to recover completely for the next shave, until there too, after some time the skin area is not so sensitive anymore. In other words the use of a blind head as described has a healing effect on the sensitiveness of the skin area in the armpit. The above description is for lengthwise curved blind heads.

Another advantage of the blind head is that they are preferably so constructed that they can "be removed immediately from the shearhead assembly and replaced by a regular cutting shearhead. This is especially important for ladies legs where larger areas should be shaved in a short time. The removing of the blind head may be done by pressing two locking springs as used in the patented Kobler shearhead assemblies.

These are the objects of my invention. Other objects and advantages of the invention will become apparent from the description now to follow of preferred embodiments thereof,

in which reference will be had to the accompanyingdrawings in which:

FIG. 1 is a front view of such a blind head.

FIG. 2 is part of a regular shearhead where .the slot entrances for the stubble are seen.

FIG. 3 is a head assembly with two regular shearheads with cutting surfaces and 1 head without cutting surfaces.

FIG. 4 is another modification of a head without cutting surfaces.

FIG. 5, 6 and 7 are also different modifications of such a blind head.

FIG. 8 and 9 and 10 are other modifications of a blind head, whereby FIG. 10 shows 2 heads mounted on a top plate of a shaver, one of these heads a blind head.

In FIG. '1 a head without cutting surfaces is shown and has the shape of a regular lengthwise curved shearhead which can be seen in all Kobler shavers and the patents taken for them.

This blind head 1 may be put on and off a shaver head assembly by pressing a spring (not shown in the drawings). That spring is holding in a groove 5 of pin 3 the blind head solidly on the head assembly plate 29, seen in FIG. 10.

In FIG. 2 numeral 4 denotes the slots on a shearhead with a cutting surface, and 2 shows the side of such a shearhead.

In FIG. 3 we see mounted on a shaver head assembly three heads. Numeral 7 is a blind head with the same shape as the adjoining shearhead which has cutting surfaces. Numerals 8 and 9 are such shearheads with cutting surfaces. Numeral 6 is a part .of the shave casing which is preferably out of plastic material.

Numerals l0 and 11 show the inside of these three heads, whereby 10 shows the channel in which an inner knife (not shown in the drawing) may move back and forth in order to cut the hair. Numeral II shows that theblind head may also be inside hollow; however, a hollow area inside the blind head has only the advantage to make such a head lighter in weight.

Now FIG. 4 shows another embodiment of a blind head. Numeral I2 denotes the blind head, 13 is the upper shape of the embodiment which in this case has several curves, whereby the skin of course stretches differently than with head 7 seen in FIG. 3. Numeral 14 is again the pin groove as described previously.

In FIG. 5 the blind head has a slanting top surface, denoted by the numeral 15. FIG. 6 shows a top rounded surface denoted by 16, and 20 is again the groove in the holding pin.

FIG. 7 shows 2 shearheads on a head assembly plate 37 and held in the shaver casing by pins 34. Head 17 is a blind head and head 19 is a head with cutting surfaces. All the FIGS. 5, 6 and 7 are side views. We see in FIG. 7 thathead 17 can be turned around, when this head is taken off the assembly plate 37 and attached again in such a way, that the holding pin 34 brings then the blind head further away from the shearhead with cutting surface, whereby a wider empty space is created between the two heads. FIGS. 8, 9 and 10 are top views. In FIG. 8 the top surface of the blind head is No. 24 and a certain distance below is surface 18. In other words 24 stands out a little bit whereby the skin glides along the slanting line of 24 on both sides of the blind head and then is released again through opening 22. 21 denotes the holding pins.

In FIG. 9 we see on the top surface of a blind head 23 several slightly protruding bars 26. The skin is stretched along the slanting lines of these bars 26. And this blind head 23 may also be turned around when it is attached again,-so that the protruding bars 26 change the directions of the slanting bars. 25 denotes again the holding pins.

In FIG. 10 we see an assembly plate 31. On it are mounted a head with a cutting surface 30 and adjoining that head 30 is a blind head 28. This blind head 28 has like the head shown in FIG. 9 slightly protruding bars. However these

bars

27 and 33 are near together on one end and further apart on the other end. 36 shows an opening between these

bars

27 and 33 and the stretching of the skin will be different from the stretching seen with bars shown in FIG. 9.

Numerals

32 and 35 are the holding pins. Numeral 29 shows a small space between the head 30 and the assembly plate which is shown only to point out that this shearhead is mounted on an assembly plate.

Having now described the different Figures in the drawings, the operation of this invention is as follows:

In FIGS. 1, 3, 4, 5, 6, 7, 8, 9 and 10 we see differently shaped blind heads. FIG. 1 has the top line lengthwise curved, FIG. 3 has the top line straight, FIG. 4 has several lengthwise curvatures, FIG. 5 has the top surface slanting, FIG. 6 has it crosswise round and FIG. 7 has the attaching pin 34 offcenter on blind head 17. It is obvious that with each modification the skin is stretched differently. The user of the shaver has to find out himself by shaving with differently shaped heads, which is the best shape for his skin and beard condition. FIGS. 8, 9 and 10 have raised slanting bars on top of the blind head. And the slanting line of these heads will be different when such a head is placed in a tum-around position.

As some skins are very soft and others very hard, and some stubble are light and other very thick, it is advisable to make the blind heads in different shapes.

The result of the shave is also different when the blind head is advancing the cutting heads, or if the blind head is trailing the cutter heads. For the neck line for instance, where mostly with a three head shaver the lowest head goes below the non sensitive area, the blind head should be the lowest head. For the second cut on the face, the blind head should be the advancing head. This gives the closest shave. When the top surface of certain areas of the blind head is receding, the higher parts of such a head will penetrate deeper into the skin and with it the skin pores are more opened and a closer shave is the result.

What I claim is:

l. A mechanical shaver having a shaving head comprising a plurality of removable shearheads having cutting means for cutting stubble from the face or the like, removable skin stretching means, selective interengaging mounting means of said shaving head, stretching means and said shearheads whereby said shearheads and said stretching means may be selectively interchanged to position said stretching means in front of, between or in back of said shearheads to present prestretched skin to an adjoining shearhead as said shaver is moved over the face or the like.

2. As described in claim 1, the stretching means having the same shape and lengthwise curvature on top as the shearhead.

3. As described in claim 1, the stretching means having recessed and protruding parts on the skin-touching surface.

4. As described in claim 1, the stretching means being rounded on top, seen in cross section.

5. As described in claim 1, the stretching means having a slanting surface which touches the skin.

6. As described in claim 1, the stretching means with on its top surface protruding slanting parts, slanting in difierent directions.

7. As described in claim 1, the stretching means having the top surface roof-shaped and lengthwise curved.

Claims

1. A mechanical shaver having a shaving head comprising a plurality of removable shearheads having cutting means for cutting stubble from the face or the like, removable skin stretching means, selective interengaging mounting means of said shaving head, stretching means and said shearheads whereby said shearheads and said stretching means may be selectively interchanged to position said stretching means in front of, between or in back of said shearheads to present prestretched skin to an adjoining shearhead as said shaver is moved over the face or the like.

6. As described in claim 1, the stretching means with on its top surface protruding slanting parts, slanting in different directions.