US2783534A - Shear plate for dry shavers - Google Patents

Description

March 5, 1957 E. GAGNAN SHEAR PLATE FOR DRY SHAVERS Original Filed Oct. 16, 1951 Inventor Emzle Gagnan' fl'lfonnqys If 1 K42 United States Patent SHEAR PLATE FOR DRY SHAVERS Emile Gagnan, Montreal, Quebec, Canada Original application October 16, 1951, Serial No. 251,472, now Patent No. 2,694,253, dated November 16, 1954. Divided and this application March 18, 1953, Serial No. 343,187

4 Claims. (Cl. 30-43) The present invention relates to dry shaving devices and is a division of United States application No. 251,472, filed October 16, 1951, now Patent No. 2.694153, granted November 16, 1954, entitled Razor.

In this application there was originally disclosed a shaving device including various screens and a razor form having oppositely inclined blades. All forms comprised a plurality of cutting blades, the edges of which define a' cutting area over which a thin, perforated screen is displaceable, said screen acting as a shear plate for whiskers entering the screen perforations.

The present invention has in view a special type of screen and its various forms that can be used in such a shaving device.

As stated in the parent application, many razors have been suggested wherein a perforated screen and cutting blades are moved in relation to each other.

But, so far, most such devices embodied continuous screens diflicnlt and expensive to manufacture, especially if they are not very small.

The present invention has been conceived to avoid the above noted drawbacks and its main objective is a screen adapted to move in a continuous movement of translation over the cutting edges.

The primary object of the invention, therefore, may be stated to reside in an improvement screen for rapidly and safely shearing whiskers to be shaved, and working as efiiciently as the already known continuous screens.

Other objects and advantages'will become apparent, or be pointed out further, during the description to follow.

As an example, and for purposes of illustration only, two embodiments of the invention are shown in the annexed drawing, wherein:

Figure 1 is a perspective view of a screen with the ends cut at right angles with the direction of movement;

Figure 2 is a partial perspective view of the ends of such a screen in their overlapping position;

Figure 3 is a partial perspective view of a screen having its ends cut at an angle with the direction of movement; and

Figure 4 is a perspective view of a shaver embodying a screen according to the invention.

Referring to the drawing, wherein similar reference characters represent corresponding parts throughout, the shaver of Figure 4 corresponds to the example given in the parent application, said shaver carrying a screen such as shown in Figure 3 and indicated by the numeral 10.

The screen is indicated generally by the letter S and is adapted to be moved in relation to the blades, for

shearing whiskers entering the holes of said screen. Ob-

viously, due to the usual unilateral inclination of the blades, a shearing action will be obtained in one direction of movement only, that is: when the screen is moved towards the cutting edges. In the other direction, the

2,783,534 ?a.tented Mar. 5, 1957 ice screen will slide over the inclined blades and, consequently, move away from the edges proper.

So, it is important that the overlapping ends of the screen be so disposed that the end uppermost be the one facing directly the leading edge of the cutting blades.

The perforated screen is made of a thin fiat metal strip in which holes are made by any suitable means already known.

After the screen has been perforated, at least one end is rolled for a close contact of the ends together, when assembled on the razor. A general curve can be imparted to the screen as a whole, if preferred.

The said ends may be cut right-angularly with respect to the sides, as shown in Figure 2 or, as depicted in Figure 3, the ends may be skewed, that is: at an engle with respect to the sides. Both ways work perfectly, when correctly assembled, although the skewed form 1s smoother-operating and less apt to blunt the cutting edges because, obviously, the sliding action of the inner screen edge is progressive over the said cutting edge.

Consequently, the characteristic feature of this invention resides in the concept of using a discontinuous screen, having overlapping edges, and adapted to be displaced in a continuous manner over suitably inclined cutting blades.

This concept is novel with the invention because, so far, all known razors having cutting blades and a screen continuously movable thereover, have used a continuous cylindrical screen.

Compared to such cylindrical continuous screens, the discontinuous overlapped-ends screen of the invention possesses many advantages. It is easy and inexpensive to manufacture and it operates perfectly in any suitably designed razor.

Summing up, therefor, the invention consists in an improvement to dry shavers having cutting blades over which a perforated thin screen is adapted to be displaced, preferably in a continuous manner.

Said improvement is in the form of a thin, perforated screen of generally tubular form and discontinuous, that is: consisting of a suitable strip curved upon itself so that the ends thereof overlap and are free of each other.

Obviously, such a screen must be suitably mounted over the cutting blades and its side edges prevented from injuring the skin of the user.

Various means for that purpose are available, examples thereof having been shown and described herein and in the parent Patent No. 2,694,253.

What I claim is:

1. As a continuously movable shear plate for use in dry shavers a substantially rectangular screen consisting of a resilient, thin, foraminous band coiled upon itself to have its end edges in free overlapping, offset, position.

2. A screen as claimed in claim 1, in which the ends are oblique with respect to the sides.

3. A screen as claimed in claim 1, in which the ends are cut perpendicular to the sides.

4. A screen for a shaving device comprising a foraminous resilient band formed to have a permanent camber at least at one end so as to be adapted to hug a circular or oval razor body in snug ends-overlapping position.

References Cited in the file of this patent UNITED STATES PATENTS 2,282,725 Jepson May 12, 1942 FOREIGN PATENTS 427,439 Italy Nov. 20, 1947

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