U.S. patent application number 10/613304 was filed with the patent office on 2004-10-28 for multi-layer bristle.
Invention is credited to Canton, Albert, Mitten, Mike, Travers, John.
Application Number | 20040211018 10/613304 |
Document ID | / |
Family ID | 33302733 |
Filed Date | 2004-10-28 |
United States Patent
Application |
20040211018 |
Kind Code |
A1 |
Canton, Albert ; et
al. |
October 28, 2004 |
Multi-layer bristle
Abstract
A multi-layer bristle includes a core layer and a plurality of
outer layers. The outer layers may be flagged to provide multiple
smaller bristles. Each of the core layer and the outer layer may
have particular material properties to provide the bristle with
particular functions bases on the material properties. The
multi-layer bristle can be manufactured by the process of
co-extrusion.
Inventors: |
Canton, Albert; (Wooster,
OH) ; Mitten, Mike; (Wooster, OH) ; Travers,
John; (North Royalton, OH) |
Correspondence
Address: |
MARSHALL, GERSTEIN & BORUN LLP
6300 SEARS TOWER
233 S. WACKER DRIVE
CHICAGO
IL
60606
US
|
Family ID: |
33302733 |
Appl. No.: |
10/613304 |
Filed: |
July 3, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60393963 |
Jul 3, 2002 |
|
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|
Current U.S.
Class: |
15/207.2 ;
428/373 |
Current CPC
Class: |
A46D 1/00 20130101; A46D
1/023 20130101; Y10T 428/2929 20150115; A46D 1/0292 20130101 |
Class at
Publication: |
015/207.2 ;
428/373 |
International
Class: |
A46B 015/00 |
Claims
What is claimed is:
1. A multi-layer bristle comprising: an attachment end and a free
end disposed along a longitudinal axis of the bristle; a core layer
constructed from a first material; and at least one outer layer
surrounding the core layer, the outer layer constructed from a
second material, the second material being different from the first
material.
2. A multi-layer bristle according to claim 1, wherein the core
layer and the at least one outer layer are circular in cross
section and concentric.
3. A broom fabricated with a plurality of bristles according to
claim 1.
4. A multi-layer bristle according to claim 1, wherein the first
material is adapted to provide structural support for the
bristle.
5. A multi-layer bristle according to claim 1, wherein the second
material includes a non-abrasive material.
6. A multi-layer bristle according to claim 1, wherein the second
material includes an antimicrobial material.
7. A multi-layer bristle according to claim 1, wherein at least the
first material or the second material includes one or more recycled
materials.
8. A multi-layer bristle according to claim 1, wherein the second
material includes electrostatic properties for attracting debris
onto the bristle.
9. A multi-layer bristle according to claim 1, wherein the second
material includes anti-electrostatic properties for repelling
debris from the bristle.
10. A multi-layer bristle according to claim 1, wherein the second
material includes hydrophilic properties to absorb water onto the
bristle.
11. A multi-layer bristle according to claim 1, wherein the second
material includes hydrophobic properties to repel water from the
bristle.
12. A multi-layer bristle comprising: an attachment end and a free
end disposed along a longitudinal axis of the bristle; a core
layer; and a plurality of outer layer segments attached to the core
layer, wherein the plurality of outer layer segments are adapted to
detach from the core layer at the free end of the bristle to form a
plurality of flagged tips at the free end of the bristle.
13. A multi-layer bristle according to claim 12, wherein the core
layer includes at least a first material property and the outer
layer includes at least a second material property, the first
material property being different from the second material
property.
14. A multi-layer bristle according to claim 12, wherein the core
layer and the outer layer are shaped to provide a substantially
circular cross section for the bristle.
15. A multi-layer bristle according to claim 12, wherein the outer
layer is co-extruded with and surrounds the core layer.
16. A multi-layer bristle according to claim 12, comprising a resin
adapted to attach the outer layer to the core layer, wherein the
resin provides a weak bond to form the plurality of flagged
tips.
17. A multi-layer bristle according to claim 12, wherein the outer
layer includes a plurality of serrations from the free end to a
distance on the outer layer along the longitudinal axis, wherein
the outer layer detaches from the core layer at the serrations.
18. A broom fabricated with a plurality of bristles according to
claim 12.
19. A method of manufacturing a multi-layer bristle comprising the
steps of: providing a core layer material including a first
material property to a co-extrusion die having a cross section
corresponding to a cross section of the bristle, wherein a core
layer of the bristle includes the core layer material; providing at
least one outer layer material including a second material property
to the co-extrusion die, the second material property being
different from the first material property, wherein an outer layer
of the bristle includes the outer layer material; and co-extruding
the core layer material and the outer layer material through the
co-extrusion die, the co-extruding step forming the bristle having
an attachment end and a free end disposed along a longitudinal axis
of the bristle.
20. The method of manufacturing a multi-layer bristle according to
claim 19, further comprising the steps of: forming a plurality of
serrations on the outer layer from the free end to a distance on
the outer layer along the longitudinal axis, wherein the outer
layer separates from the core layer at the serrations upon impact
of the free end with a surface to provide a plurality of flagged
tips at the free end.
21. The method of manufacturing a multi-layer bristle according to
claim 19, further comprising providing a weak bond between the
outer layer and the core layer, wherein the outer layer separates
from the core layer upon impact of the free end with a surface to
provide a plurality of flagged tips at the free end.
Description
RELATED APPLICATION
[0001] This application claims priority from U.S. provisional
application Ser. No. 60/393,963, filed Jul. 3, 2002.
FIELD OF INVENTION
[0002] The present invention relates generally to bristles and,
more particularly, to multi-layer bristles for use in cleaning
products.
BACKGROUND
[0003] Cleaning tools such as brooms and brushes have bristles
attached thereto for collecting dust and debris from a surface, or
for scrubbing the surface to remove stains. Such cleaning tools are
designed to provide general cleaning functions. Although the
aforementioned cleaning tools perform adequately for general
everyday cleaning, they lack functionally effective bristle designs
for special cleaning needs. Furthermore, the current bristle
designs and materials do not provide highly effective cleaning that
even the most common cleaning applications demand.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] FIG. 1 is a side elevational view of a bristle constructed
in accordance with the teachings of the present disclosure.
[0005] FIG. 2 is a cross sectional view of a two-layer bristle
constructed in accordance with the teachings of the present
disclosure.
[0006] FIG. 3 is a cross sectional view of a three-layer bristle
constructed in accordance with the teachings of the present
disclosure.
[0007] FIG. 4 is a cross sectional view of a first example of a
two-layer flagged tip bristle constructed in accordance with the
teachings of the present disclosure.
[0008] FIG. 5 is a side elevational view of the bristle of FIG.
4.
[0009] FIG. 6 s a side elevational view of the bristle of FIG. 4
showing the bristle in a flagged-tip configuration.
[0010] FIG. 7 is a cross sectional view of a second example of a
two-layer flagged tip bristle constructed in accordance with the
teachings of the present disclosure.
[0011] FIG. 8 s a side elevational view of the bristle of FIG. 7
showing the bristle in a flagged-tip configuration.
[0012] FIG. 9. is a diagrammatic view of a broom having bristles
constructed in accordance with the teachings of the present
disclosure.
[0013] FIG. 10 is a diagrammatic view of a brush having bristles
constructed in accordance with the teachings of the present
disclosure.
DETAILED DESCRIPTION
[0014] Referring to FIGS. 1-8 of the drawings, exemplary bristles
10, 12 and 14, constructed in accordance with the teachings of the
present disclosure are shown. Bristle 10 is a two-layer bristle
that includes a core 20 and an outer layer 22, while bristle 12 is
a three-layer bristle that includes a core 24, an intermediate
layer 26, and an outer layer 28. One of ordinary skill in the art
will readily appreciate that any number of layers in a bristle
constructed in accordance with the teachings of the invention can
be provided. Referring to FIG. 3, bristle 14 is a two-layer flagged
tip bristle that includes a core 30 and an outer layer 32. Bristle
14 mechanically flags at the tip upon impact (i.e., the outer layer
32 splays and separates from the core 30), to provide multiple
smaller bristles 34 from one bristle 14.
[0015] Referring to FIG. 1, each of the bristles 10, 12 and 14,
which is generally shown in FIG. 1 as bristle 15, includes an
attachment end 31 and a free cleaning tip end 33 that are disposed
along a longitudinal axis 29. The attachment end 31 of the bristle
15 is typically attached to a cleaning device, a tool or the like,
and therefore is fixed, while the cleaning tip end 33 is free. The
bristle 15 is flexible but resiliently resists bending. A plurality
of bristles 15 are generally attached to a cleaning device such as
a broom 39 or a brush 41, as shown in FIGS. 9 and 10. The cleaning
tip ends 33 of the plurality of bristles define a cleaning head 35.
When the cleaning head 35 is pressed on a surface and moved in a
cleaning direction (not shown), the cleaning tip ends 33 of the
bristles collectively dislodge dirt, debris and small objects from
the surface. Furthermore, because the bristles 15 bend opposite the
cleaning direction, the resilient flexibility of each bristle 15
causes the dislodged and collected dirt and debris to be pushed
forward of the cleaning direction. One of ordinary skill in the art
will readily appreciate that the density of the cleaning tip ends
33 on the cleaning head 35 combined with the length, the thickness,
the length to thickness ratio, the flexibility, and the cross
sectional shape of each bristle 15, are a few of the many factors
that may influence the cleaning characteristics of the cleaning
device, a tool or the like. Additionally, as will be described in
the following, the construction materials of each bristle 10, 12
and 14 influence the cleaning and functional characteristics of a
cleaning device, a tool or the like.
[0016] Referring to the bristle 10 shown in FIG. 2, the core 20 and
the outer layer 22 can be constructed with different materials to
provide a particular function for a tool to which the bristle 20 is
attached. In a first example of the two-layer bristle 10, a rubber
bristle is constructed with Polypropylene, Poly Vinyl Chloride, or
the like for the core 22, and a thermoplastic elastomer, rubber, or
the like for the outer layer 20. The core 22 provides a stiffer
structure than a bristle that is constructed solely from rubber,
while the softer outer layer 20 provides better cleaning and is
non-abrasive so as to prevent scratching of a surface to which it
is applied.
[0017] In a second example of the two-layer bristle 10, a germ-free
bristle is constructed with an antimicrobial material for the outer
layer 20. For example, the outer layer 20 can be constructed with
silver zeolite, triclosan, or similar antimicrobial materials. The
core 22 can be constructed from Polypropylene, Poly Vinyl Chloride,
or any similar material that may be well known to those of ordinary
skill in the art to be suitable for such a purpose.
[0018] In a third example of the two-layer bristle 10, a recycled
bristle is constructed with one or more recycled materials for
either the core 22, the outer layer 20, or both the core 22 and the
outer layer 20. The recycled material for the core 22 can include
recycled resin. The recycled material for the outer layer 20 can
include a polymeric resin or plastic resin mixed with finely
dispersed particles of a natural fiber, such as, wood, cotton,
tampico, palmyra, broom corn, coco, or the like.
[0019] In a fourth example of the two-layer bristle 10, a dust
bristle is constructed with an outer layer 20 that has electrically
static or anti-static properties to improve dust cleaning by
attraction and/or release of dust particles, respectively.
Materials with such electrical properties include ethoxylated
aliphatic amines and amides, quaternary ammonium salts, glycol
esters, nonionic surfactants, or other materials that are well
known to those of ordinary skill in the art. The core layer 22 can
be constructed from rubber. One of ordinary skill in the art will
readily appreciate, however, that the core layer 22 can be
constructed from Polypropylene, Poly Vinyl Chloride, or the like so
as to provide a stiffer structure than a bristle that is
constructed solely from rubber.
[0020] In a fifth example of the two-layer bristle 10, the outer
layer 20 is constructed with a hydrophilic (i.e., water absorbing)
material, such as cotton, to provide a water absorbing cleaning
tool. Similarly, the outer layer 20 can be constructed with a
hydrophobic (i.e., water repelling) material, such as polystyrene
or a rubber blend, to provide a water repelling cleaning tool. The
core layer 22 can be constructed from rubber. One of ordinary skill
in the art will readily appreciate, however, that the core layer 22
can be constructed from Polypropylene, Poly Vinyl Chloride, or the
like so as to provide a stiffer structure than a bristle that is
constructed solely from rubber.
[0021] Referring now to the multi-layer bristle 12 shown in FIG. 2,
the core 24, the intermediate layer 26, and the outer layer 28 can
include any of the aforementioned materials disclosed in relation
to the two-layer bristle to provide similar specialized functions.
One of ordinary skill in the art will readily appreciate that a
three-layer bristle may provide specialized functions in addition
to the exemplary functions disclosed in relation to the two-layer
bristle. Furthermore, bristles with more than three-layers can be
constructed to provide highly unique cleaning functions in addition
to those disclosed in relation to the two-layer bristle.
[0022] Referring now to FIGS. 4-6, a first example of a flagged tip
bristle 14 is shown. As shown in FIG. 6, the core 30 is cross
shaped. Accordingly, the outer layer 32 forms four pie-shaped
segments that surround the core 30. Upon impact of the bristle 14
with a surface, the outer layer 32 will separate from the core 30
at the tip of the bristle 14 and will splay. To provide such
separation or flagging of the tip of the bristle 14 upon impact,
the outer layer 32 includes a resin that does not provide a strong
bond with the material used for the core 30. The flagging of the
bristle 14 will provide a fuller bristle 14 at the tip by creating
multiple smaller bristles 34 from one flagged tip bristle 14 in a
controlled manner. In other words, the flagging provides a cleaning
head 35 having a larger number of cleaning tip ends 33 than a
cleaning head 35 of comparable size having the same number of
bristles. The cross sectional shape of the core 30 can be chosen to
provide desired flagging characteristics. Thus, the shape and size
of each of the flagged tips 34 can be controlled as desired by
accordingly designing the cross sectional shape of the core 30. For
example, as shown in FIG. 4, the core 30 is cross shaped.
Accordingly, upon mechanical flagging of the tip of the bristle 14
(i.e., impact of the tip with a surface), the outer layer 32
separates from the core 30 at the tip of the bristle 14 to form
four similarly shaped smaller bristles 34.
[0023] Referring to FIGS. 7 and 8, a second example of a flagged
tip bristle 14 is shown. The outer layer 32 includes a plurality of
serrations 37 in addition to including a resin that does not
provide a strong bond with the material used for the core 30. The
serrations 37 are disposed on the outer layer 32 at the cleaning
tip end 33 and running upward a distance along the longitudinal
axis 29. Accordingly, impact of the bristle 14 with a surface
causes the outer layer 32 to break along the serrations 37 (shown
in FIG. 8), and the weak bond between the outer layer 32 and the
core 30 causes the flagged tips to splay from the core 30.
[0024] In the disclosed examples, each outer layer 22, 28 and 32 is
shown in FIGS. 2, 3, 4 and 7 to be concentric with each core layers
20, 24 and 30, respectively. One of ordinary skill in the art will
readily appreciate, however, that the multiple layers of the
disclosed bristles 10, 12 and 14 may be non-concentric to provide
different functional characteristics than a concentric bristle.
Such functional characteristics may include, for example,
variations in bending and resiliency characteristics of the bristle
that depend on the bending direction.
[0025] The disclosed multi-layer bristles can be manufactured by
methods well known to those of ordinary skill in the art. However,
in the preferred example, the multi-layer bristles are manufactured
by co-extrusion of the multiple layers in the bristles. One of
ordinary skill in the art will appreciate that extrusion of
multi-layer bristles is similar to conventional profile
co-extrusion with multiple extruders feeding a crosshead die with
the desired cross section.
[0026] Referring to FIGS. 9 and 10, two exemplary cleaning tools 39
and 41 constructed with the disclosed multi-layer bristles are
shown. FIG. 9 shows a broom 39 that includes multi-layer bristles
that can be used for common or special applications. The broom 39
includes a base 43 and a handle 45. Each multi-layer bristle is
attached to the broom 39 at the attachment end thereof. The
cleaning tip ends 33 of the multi-layer bristles are free and form
the cleaning head 35. Similarly, as shown in FIG. 10, the brush 41
includes multi-layer bristles that can be used for common or
special applications. The brush includes a base 47 that can be held
by a user during application, and a number of multi-layer bristles
that are attached to the base 47 at the attachment ends 31 thereof.
One of ordinary skill in the art will appreciate that any tool or
device that uses bristles can include the disclosed multi-layer
bristles. For example, the disclosed multi-layer bristles can be
used for function specific cleaning tools and grooming tools, such
as, toothbrushes, street cleaning machines, shoe shining and
cleaning brushes, hair brushes, and other bristle type tools. One
of ordinary skill in the are will further appreciate that the
disclosed multi-layer bristles can be used in a wide variety of
tools other than cleaning devices. For instance, a paint brush can
be constructed having the disclosed multi-layer bristles to provide
a desired paint application characteristic.
[0027] Persons of ordinary skill in the art will appreciate that,
although the teachings of the invention have been illustrated in
connection with certain embodiments, there is no intent to limit
the invention to such embodiments. On the contrary, the intention
of this application is to cover all modifications and embodiments
fairly falling within the scope of the teachings of the
invention.
* * * * *