US1919011A - Brush - Google Patents

Description

Patented July 18, 1933 UNITED STATE-S JAMES CONNOR. OE CLEVELAND, OHIO tiaei BRUSH Application filed November struct brushes of this character with metallic brushes which appear to be successfully marketed are those wherein the tufts are locked into place by means of a wire, which is looped around the tufts, and is securely anchored to the back of the brush. This is not only unsightly but it leaves many crevices and obstructions in whichforeign material may be lodged.

, Some of these objections have been overcome by making blind sockets, forcing the tufts into the sockets and then anchoring them in place with a staple. This method of anchoring has been demonstrated to be practical but unless-the staple is securely locked, the bristles have a slight tendency to lateral movement, and thus admit foreign material into the sockets where it is inaccessible for removal.

an object of the present invention is to retain the advantage of the stapled tuft in connection with the metallic brush and to provide a method of anchoring the tuft, which will insure a water-tight connection between the tuft and the surface of the metal immediately surrounding the socket. A further object is to provide a brush wherein the bristles. which comprises each tuft, are firmly held in erect, compact position. In this connection, my invention is directed toward a method which can be readily utilized in connection with existing brush stapling equipment, and which will provide a brush back substantially smooth on both sides thereof.

Referring now to the drawing, Fig. 1 is a sectional view through a brush back embodying my invention and illustrating one form of sealing arrangement; Fig. 2 is a similar 9, 193i. Seria1 No. 573,753.

View illustrating a modifiedforni of sealing arrangement; Figs. 3, 4 and 5 are different steps in the'method thatI employ for carrying'out my invention. 7 j

Referring to Fig. 1, the brush back 10 'is shown as having sockets 11 and 12. A tuft 13 occupies the socket 11, while the socket 12 illustrates the form of it prior to the inser tion of a tuft. It will be noted that the socket 12 has a boss 14 extending around the marginal edge thereof, and that the socket proper comprises aligned cylindrical passageways 15 and 16, which are connected by chamfered portions 17. The inner portion 16 is adapted to receive the staple 18, which is looped 5 around the tuft, and is driven into the socket simultaneously with the tuft. I have found that the staple receiving portion 16 should be smaller than the portion 15 in order to obtain the best results in anchoring the tuft/ Furthermore, I have found that the chamfered portion provides a satisfactory shoulder which may be swaged over the staple to more securely lock it in position. The swaging operation may be accomplished by 7 5 corners on the needle 20, which is used for inserting the tuft and staple into the socket. To sealthe portion 15 against the entrance of water and of foreign material, I flatten the boss 14 after the tuft has been inserted and locked into the socket. Such flattening operation may be accomplished by forcing the conical guide 21 into contact with the boss after the needle shall have been withdrawn from the socket. Thus, as is shown in Fig. 1, the boss is flattened until it lies in the same plane as the bristle side of the brush forcing the walls of the socket 15 against the tuft. In Fig. 2, the boss 1 1-A is shown, as being flatter than the boss 14. The not resultv 0f this difference in formation is that a larger portion of the wall of the socket 15 is forced into contact with the tuft as is illustrated, at 22.

In Figs. 3, 4. and 5, I have illustrated the/3 steps in the method of accomplishing my invention. In Fig. 8, the tuft 13 with its asso ciated staple 18 is being forced downwardly through the guide 21 and into the sockets 15,

and 16 by means of the needle 20. In Fig. 4,

the staple and tuft have been driven into the socket and the corners 25 of the needle have engaged the ehamfered portion 17 of the socket and forced part of it in contact with the top of the staple thereby locking it more effectively into place. In Fig. 5, the needle has been withdrawn and theguide 21 has been forcedintocontact with the back 10 with sufficient pressure to flatten the boss, and thereby to seal the tuft. Thus, the tuft is tightly com against the tuft in and can be subjected to the action of scalding water without impairing the firmness with which the bristles are held in place. Furthermore, the sockets are completely sealed against entrance of foreign material.

I therefore claim 1. A brush back having a socket opening therein, a tuft folded within the socket, a staple embracing: the tuft an intern'iediate portion or the wall of the socket being swaged over the staple, and the wall of the socket adjacent the outer end thereof-being swaged sealing relation therewith. 2. A brush having a socket opening from one side thereof, 'a'folded tuft therein, the inner wall of the socket being; swagcd. to lock the tuft in place, and the outer wall of the socket being swagged to provide a moisture,- proof seal around the tuft.

JAMES F. CONNOR.

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