US2358464A - Bristle holder for brushes - Google Patents

Description

Sept. 19, 1944. MA R 2,358,464

BRISTLE HOLDER FOR BRUSHES Filed Oct. 8, 1942 I INVENTOR C I JOSEPH W- MAYE/L 25 7 k 24 BY 14 TTOR/VE Y Patented Sept. 19, 1944 BRISKTLE HOLDER FOR BRUSHES Joseph W. Mayer, Troy, N. Y., assignor to Hughes-Autograf Brush Company, Inc., New York, N. Y., a corporation of New'York v Application October 8, 1942, Serial No. 461,317

1 Claim.

This invention relates to bristle holders for brushes and has for its object to provide a bristle holder free of the disadvantageous features of those heretofore proposed.

Heretofore, such bristle holders were made of metal which was subject to rust and discoloration, and as a result brushes which still had a reasonably useful life were discarded.

This invention consists in the improvement in the art of bristle brushes, in which the bristle holder or slug is made of plastic material which may be either of thesame material and color as that of the handle or made from a difierent type of plastic, and in which the plastic slug is somewhat larger than the diameter of the hole into which the slug is to be inserted, so that the slug firmly presses itself against the inside of the hole, creating a firm grip with sufficient pressure due to the inherent resiliency of the slug, to anchor the tuft of lbristle Within the said hole.

The invention will be further described hereinafter, embodiments thereof will be shown in the drawing, and the invention will be finally set forth in the claim.

In th accompanying drawing,

Fig. l is a front view, partly in section taken on line I-l of Figure 3, of a part of a brush;

Fig. 2' is a sectional view of the same, taken on line 22 of Figure 3;

Fig. 3 is a plan view;

Fig. 4 is a diagrammatic view showing a diameter of the bore for the tuft, and the larger diameter plastic tult holder or slug, the arrow showing the direction of entrance movement of the slug in respect to the bore;

Fig. 5 is a front View partly in section of an alternate embodiment of the invention, taken along line 5-5 of Fig. 7;

Fig. 6 is a partial section taken on line 66 of Fig. 7; 1

Fig. 7 is a plan View, and

Fig. 8 is a diagrammatic view showing the larger diameter slug being moved into the smaller diameter bore of the brush. 7

Similar characters of reference indicate corresponding parts throughout the various views.

Referring to the drawing, and more particularly to Figure 4, the dot-dash line outline of the slug ID has a diameter about /1000 of an inch larger than the diameter of the bore II of the brush l2. The arrow l3 indicates the direction of movement of the slug as it enters the bore.

As is known, a number of bristles 9 are gathered and at their median point are enclosed by a slug, to form a tuft. The bristle is cut to more than double the length that is needed for pro jection from the brush, and the :bristle is then folded around the slug as it enters the bore of the brush, and is then held therein by the slug. The slug I0 of plastic material when inserted in the bore H in the manner described due to its greater width than the diameter l2 of the bore, shapes itself into the form shown in Fig. 3, and due to its inherent resiliency or'bow force has its ends pressed against the opposite walls of the bore of the brush [3. It will be noted that there is no groove along the walls of the bore, and in view thereof the slug can take any radial position. The plastic material used for the slug does not discolor and so there is no possibility of any discoloration or corrosion, and the brush will keep its appearance while in use for a long period of time. The plastic material can be of the same color as that of the handle, so that it becomes invisible to the eye, and the brush so made creates a clean appearance. The plastic material slug does not cut or injure the bristles, as the slug has sufiicient resiliency and softness to prevent such a contingency. 1

Instead of using a flat shaped slug, a triangular shaped slug such as shown in Figures 5 to 8 may be used. In this case, the two free ends l8 and IQ of the slug 20, are slightly spaced from each other as shown by the space 2 I. The width 22 of the slug 20 is larger than the diameter 23 of the :bore 24 of the brush 25 as shown in Fig. 8, here again by about. /1000 of an inch. The

arrow 26 shows the direction of the applied pressure. When the slug 20 has been inserted into the bore 24 as shown in Fig.5, a secured anchorage is obtained. Due to the spacing at the free ends of the triangular slug, the slug itself does not bend, as the fiat slug of Figure 3, but in such cases where the spacing is not used or where insufiicient to prevent lbending, then a slight bending takes place.

The prior art is largely represented by two types of metal slugs, one, a metal piece is used which cuts a slot into the sides of the bore of the brush handle, embedding itself into the material of the brush handle; and the other a metal member which after insertion is swaged. The disadvantage of the former is that the slot acts as a dirt catcher, into which toothpaste and other sediments are accumulated which cannot be readily destroyed. Also, whether made of brass, nickel or other non-ferrous metal, the metal becomes discolored and makes the brush unsightly and in many cases, the brush is discarded before its useful life has terminated. The disadvantages of the second type of metal slug which has been forced into the walls of the bore is that this extra pressure often cuts the bristles in two or injures them at the bottom of the bore.

Among the advantages of the improved slug is that no groove is cut into the bore; there is no possibility of any discoloration or-corrosion, the plastic material slug is invisible, the bristles are not cut, the plastic material acting as a cushion, and if the slug is made of the same color as the brush, the appearance of the brush is improved.

A slug made of tampico, rattan or other types of fibre, which can be used in round form, has many of the advantages of the plastic material, when such slugs are constructed and used in the manner described in the foregoing.

By the word brushes in the foregoing de- 7 scription, any formof brush, as tooth, hair, hand, mascara and other typesof brushes is intended, in which bristles are inserted and held by a slug.

It will have been noted that the improvement consists in making the slug of a material which has an inherent resiliency or bow action when slightly bent, or pressed out of itsinitial or normal shape, and'has also a yieldability against applied pressure along its exterior to enable it to give gently in respect to the bristle tuft. The result is that this slug firmly presses itself against the inside of the hole, creating a firm grip with sufiicient pressure to anchor itself to the bore and securely hold the tuft of bristle within the bor of the brush, and also preventing injury to the bristles.

In the embodiments, the slug is substantially flat or in a plane and is expansible to attain the locking action with the bore, the transverse configuration being either round or having rounded edges so as to avoid tearing the bristles.

I have described the invention in connection with the embodiment shown, but it is clear that changes maybe made therein without departing from the spirit of the invention as set forth in the appended claim.

.I claim:

The combination of a brush handle having hannunrestricted bore of the same diameter throughout its depth and a slug holding looped bristles at the loop, said slug being of wire bent to equilateral triangular form with the corners uniformly rounded and with its base portion having a length slightly larger than the diameter of the bore to enable the base portion to be inserted in the bore diametrically thereof, with the corner-opposed to the base portion entering the bore before thebase portion, and having a cut out spacing the 1egs at their free ends in abutting relationship, the curved corners of the base portion adapted when inserted into the bore to press

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