US3577839A — Brush and brush material

Claim 1

Independent Claim 152 words

A brush comprising a brush bristLe support and bristles extending therefrom, in which said bristles comprise an elongated inner core of a large number of fine glass filaments, abrasive grains adhered to the exterior of said core in slightly spaced apart relationship, said abrasive grains being bonded to the exterior of said core by a primer coating on said core and the interior of said core being free of said abrasive grains, and a thin outer nylon coating over said core and abrasive grains, said outer coating being sufficiently thin to conform to said grains sufficiently to form corresponding protuberances on the surface of the bristle, wherein said filamentous core comprises approximately 600 glass monofilaments, said abrasive grains are elongated silicon carbide crystals of 80 to 500 mesh oriented generally parallel to the bristle length and spaced about 1 grain diameter apart on the average, and said outer nylon coating is heat-stabilized.

Claim 2

Dependent Claim 152 words

A brush comprising a brush bristLe support and bristles extending therefrom, in which said bristles comprise an elongated inner core of a large number of fine glass filaments, abrasive grains adhered to the exterior of said core in slightly spaced apart relationship, said abrasive grains being bonded to the exterior of said core by a primer coating on said core and the interior of said core being free of said abrasive grains, and a thin outer nylon coating over said core and abrasive grains, said outer coating being sufficiently thin to conform to said grains sufficiently to form corresponding protuberances on the surface of the bristle, wherein said filamentous core comprises approximately 600 glass monofilaments, said abrasive grains are elongated silicon carbide crystals of 80 to 500 mesh oriented generally parallel to the bristle length and spaced about 1 grain diameter apart on the average, and said outer nylon coating is heat-stabilized.

Claim 3

Dependent Claim 53 words

The brush of claim 1, wherein said filamentous core constitutes about 30 percent, the primer coating constitutes about 5 percent, the abrasive grains constitute about 25 percent, and the outer nylon coating constitutes about 35 percent, all by volume, of the bristle, said bristles being about 0.030 to about 0.035 inch in diameter.

Claim 4

Dependent Claim 72 words

A brush comprising a brush bristle support and bristles extending therefrom, in which said bristles comprise an elongated inner core, abrasive grains adhered to the exterior of said core, and a thin outer plastic coating over said core and abrasive grains, said outer coating being reinforced with short fine fibers incorporating therein and being sufficiently thin to conform to said grains sufficiently to form corresponding protuberances on the surface of the bristle.

Claim 5

Dependent Claim 72 words

A brush comprising a brush bristle support and bristles extending therefrom, in which said bristles comprise an elongated inner core, abrasive grains adhered to the exterior of said core, and a thin outer plastic coating over said core and abrasive grains, said outer coating being reinforced with short fine fibers incorporating therein and being sufficiently thin to conform to said grains sufficiently to form corresponding protuberances on the surface of the bristle.

Claim 6

Dependent Claim 22 words

The brush of claim 3, wherein said short fine fibers are chopped glass fibers about one-sixteenth to about one-eighth inch in length.

Claim 7

Dependent Claim 64 words

Brush bristle material comprising an inner filamentous core of a large number of fine glass filaments, abrasive grains bonded to the exterior of said core in slightly spaced apart relationship, and a thin outer plastic coating of sufficient thinness and conforming to said grains sufficiently to form corresponding protuberances on the surface of the bristle, said outer plastic coating being of heat shrunk nylon.

Claim 8

Dependent Claim 64 words

Brush bristle material comprising an inner filamentous core of a large number of fine glass filaments, abrasive grains bonded to the exterior of said core in slightly spaced apart relationship, and a thin outer plastic coating of sufficient thinness and conforming to said grains sufficiently to form corresponding protuberances on the surface of the bristle, said outer plastic coating being of heat shrunk nylon.

Claim 9

Dependent Claim 28 words

The brush bristle material of claim 5, wherein said grains are rough surfaced, elongate, and arranged with their longest dimensions generally parallel to the length of said bristle.

Claim 10

Dependent Claim 71 words

Brush bristle material comprising a plurality of individual strands of elongated material, each said strand comprising bundles of filaments and having abrasive grains adhered to the surfaces thereof, said strands being assembled in close side-by-side relationship, and a thin outer coating of plastic material covering the assembly of said strand and grains, said coating conforming to said grains sufficiently to form small protuberances on the surface of the finished composite bristle.

Claim 11

Dependent Claim 71 words

Brush bristle material comprising a plurality of individual strands of elongated material, each said strand comprising bundles of filaments and having abrasive grains adhered to the surfaces thereof, said strands being assembled in close side-by-side relationship, and a thin outer coating of plastic material covering the assembly of said strand and grains, said coating conforming to said grains sufficiently to form small protuberances on the surface of the finished composite bristle.

Claim 12

Dependent Claim 29 words

The bristle material of claim 7, wherein said strands are bundles of glass fibers, said grains are bonded thereto in spaced relationship, and said thin outer coating is nylon.

Claim 13

Dependent Claim 43 words

Brush bristle material comprising an elongated strand having granular abrasive adhered thereto, and a thin outer plastic coating covering said strand and abrasive, wherein said granular abrasive comprises only from about 8 percent to 12 percent of the total volume of said bristle.

Claim 14

Dependent Claim 43 words

Brush bristle material comprising an elongated strand having granular abrasive adhered thereto, and a thin outer plastic coating covering said strand and abrasive, wherein said granular abrasive comprises only from about 8 percent to 12 percent of the total volume of said bristle.

Claim 15

Dependent Claim 59 words

Brush bristle material having elongate abrasive grains secured thereto and disposed with their longest dimension generally parallel to the length of said bristle, said grains being spaced apart. 11 A rotary brush comprising a central brush bristle support and bristle extending generally radially outwardly therefrom, which bristles are at least in part of heat shrunk and heat stabilized nylon.

Claim 16

Dependent Claim 59 words

Brush bristle material having elongate abrasive grains secured thereto and disposed with their longest dimension generally parallel to the length of said bristle, said grains being spaced apart. 11 A rotary brush comprising a central brush bristle support and bristle extending generally radially outwardly therefrom, which bristles are at least in part of heat shrunk and heat stabilized nylon.

Claim 17

Dependent Claim 24 words

The brush of claim 11, wherein said bristles comprise an inner filamentous core having a coating of heat shrunk anD heat stabilized nylon thereon.

Claim 18

Dependent Claim 12 words

The brush of claim 12, wherein said core comprises fine glass fibers.

Claim 19

Dependent Claim 16 words

The brush of claim 12, wherein abrasive grains are adhered to said core under said coating.

Claim 20

Dependent Claim 33 words

The brush of claim 14, wherein said core comprises fine glass fibers, and said abrasive grains constitute only from about 8 percent to about 12 percent of the total volume of the bristle.

Claim 21

Dependent Claim 19 words

The brush of claim 14, wherein said coating is reinforced with a quantity of short fine fibers incorporated therein.

Claim 22

Dependent Claim 28 words

The brush of claim 12, wherein said bristles are embedded in a unitary body of elastomeric material from which only the extreme outer ends of said bristles protrude.

Claim 23

Dependent Claim 75 words

A rotary brush comprising a support and straight, stiff bristles extending therefrom, in which said bristles comprises an elongated inner core of fine glass fibers filaments, abrasive grains adhered to the exterior of said core which is free of said grains internally thereof, and a thin outer plastic coating over said core and grains, said coating being sufficiently thin to conform to said grains sufficiently to form corresponding protuberances on the surface of the bristle.

Claim 24

Dependent Claim 75 words

A rotary brush comprising a support and straight, stiff bristles extending therefrom, in which said bristles comprises an elongated inner core of fine glass fibers filaments, abrasive grains adhered to the exterior of said core which is free of said grains internally thereof, and a thin outer plastic coating over said core and grains, said coating being sufficiently thin to conform to said grains sufficiently to form corresponding protuberances on the surface of the bristle.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-05-10	1974-11-09	1975-05-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-05-10	1978-11-09	1979-05-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-05-10	1982-11-09	1983-05-11	$7700.00	Window Closed / Lapsed

Brush and brush material

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