US663973A - Brush. - Google Patents

Description

Patented nee; 8,1900. J. F. mumronn.

B R U S H (Application filed Dec. 9, 1899.)

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UNITED STATES" PATENT OFFICE.

JOSEPH F. MUMFORD, OF CHICAGO, ILLINOIS.

BRUSH.

SIEEOIFIGATION forming part of Letters Patent No. 663,973, dated December 18, 1900.

I 1 Application filed December 9, 1899. Serial No. 739,851. (No model.)

To all whom it WI/OLZ/OON/OEYR;

Be it known that I, JOSEPH F. MUMFORD, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illi-- nois, have invented certain new and useful Improvements in Brushes, ofwhich the following is a full, clear, and exact specification. My invention relates more particularly to that class of brushes in which the bristles or other fibers composing, the brush-stock are held or bound to the handle or to the ferrule or case by a binding of sheet metal or other sheet material to'form what is known in the art as a brush-knot. T

My improvements relate to the said binding; andthe invention' has for its primary object to bind the bristles or brush-stock between two strips of sheet metal by securing the strips together on each side of a bunch of the brush-stock, whereby the latter thus bound may be subsequently cut apart and secured in a ferrule or otherwise attached to a handle.

More specifically stated, the object of my invention is to bind bunches of the brush-stock between two strips of sheet metal by securing the strips together between said bunches so as to form half brush-knots capable of being secured together back to back to form whole knots.

With these ends in view my invention con-- sists in certain features of novelty described. herein, shown in the accompanying drawings, and more particularly pointed out in the claim.

In carrying out my invention I employ two reels of sheet metal or other suitable sheet material in the form of strips of any desired length. One ofthese strips is perforated at short intervals apart, and the bristles .or other fibers composing the brush-stock are held in bunches of suitable size between the strips as they unwind from their respective reels, the roots of the bristles being first dipped or otherwise provided with a suitable adhesive material, and as the strips unwind the imperforate one is punched through the perforations of the perforated one on both sides of each bunch of the brush-stock material, and the metal thus punched through is upset, so as to bind the two, strips together.

strip of material 5.

In making brush-knots in this manner it is preferable to form each bunch of the brushstock into a half-knot, and when this method is pursued the half-knots thuslinked together are cut apart and subsequently secured to getherv back to back to form whole knots, which may be attached to the handle or fer rule in any suitable way.

Inthe drawings, which show an example of my invention,Figure l is a perspectiveview of the two reels and a number of' half brushknots formed between the two strips unwinding therefrom. Fig. 2 is a perspective view, partly in section, onthe line 2 2, Fig. 1. Fig. 3 is a view of the interior face or inner sides of two of the half-knots, and Fig. 4 is a perspective view of two of the half-knots put together to form a whole knot.

1 represents a reel upon which is wound the aforesaid strip of material 2, having perforations or apertures 3 formed therein at regular intervals apart, and at is the reel, upon which. is wound the aforesaid imperforate Both of these strips are preferably composed of thin sheet metal and may be of indefinite length. As the two strips 2 5 are unwound or drawn out together from their respective reels the bristles or fractional brush-knots 6 are held in as compact a form as possible by any suitable means, while a punch is permitted to punch portions of the strip 5 through the perforations 3 in the strip 2, as shown at 7, on both sides of each knot, so as to form tongues 8 9, projecting through the opposite side of the strip 2, one of such tongues being on each side of each perforation 3. This operation'bends the strip 5 around the bunch of bristles 6 in a semicircular form, the strip 2 being held preferably I flat-against any suitable support 10, having a longitudinal slot 11 for the passage of the tonguesS 9 as they move with the linked brush-knots, thus forming brush-knots of semicircular form, or What might more properly be termed .half-knots. After the tongues 8 9 are struck up in this manner they are bent toward each other from opposite sides of each knot, or the two tongues belonging to each aperture 7 are bent'away from each other, so that one tongue of each of the apertures '7 will overlap the back of each knot lying between the apertures 7, and thus firmly lock the strip 5 to the strip 2 and bind the brush-stock between the two strips.

After the half-knots are thus formed they may be further secured between the strips 2 5 by means of pins 12, which are driven through the strips 2 5 and have their ends upset or clenched, as shown at l3, and turned in opposite directions, such upset ends being embedded in countersinks 14:, pressed into tl 1 e two strips 2 5 to prevent the formation of irregularities on the outer sides of the strips 2 5. After this has been done the half-knots 6 thus formed may be safely cut apart on the line a: 0:, thus relieving them of the superfluous portions of the strips 2 5 lying between the knots as they are produced. This last step of the operation produces a plurality of half-knots of semicircular form, or flat on one side and having the contour of the exterior of the brush-knot on the other side, which may be placed together back to back, as shown in Fig. 4, and then secured in any suitable way and* attached to the handle or ferrule. (Not shown.) For greater convenience and security in attaching the half-knots to the handle the strip 2 is made considerably wider than the strip 5, so that when the 'two half-knots are placed together the whole knot thus formed will have a flange or web proin a convenient position to=be utilized for the attachment of the knot to'the ferru-le'and also for attaching the half-knots together.

\Vhen it is desired to form brush-knots with a hollow interior instead of the web projecting' across it, the spools or reels 1 4 are transposed, or, in other words, the imperforate strip 5 is made of the present width of the perforated strip 2 and the latter of the present wi d th of theimperforate strip 5, thus bringing the wider strip on the outside around the knot and forming when the half-knot is put together a cylindrical socket, as will be understood.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

As a new and useful article of manufacture a brush-knot composed of aplurality of fractional knots each consisting of a bunch of bristles clamped between two strips of sheet material, a portion of one of said strips having a tongue or portion passing through and clenched with the other of said strips and said fractional knots being secured together in the form of a single knot, substantially as set forth. v

JOSEPH F. MUMFORD.

' Witnesses:

EDNA B. JOHNSON,

jecting diametrically across its upper end and F. A. HOPKINS.

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