Patent Grant
10743647
Presently color is used in individual bristles, which are generally combined into bristle tufts of a toothbrush, to provide the user with an indicator of the wear due to use of the toothbrush. In the case of monofilament bristles, the introduction of color for purposes other than to show wear, such as for decorative purposes, can be problematic because bristles on a toothbrush tend to have a small cross sectional diameter, which for some bristles are on the order of 0.5 mm or less. Therefore, decorative color on a toothbrush tends to be created by groupings of bristles having the same coloration, or by larger tooth cleaning elements, which make it easier to introduce coloration due to the larger scale size as compared to an individual bristle.
The present invention is directed to an oral care implement having bristles with components that are combined to create decorative color combinations in individual bristles, and by extension enabling new color features within bristle tufts and on toothbrushes.
In one aspect, the invention can be a monofilament bristle comprising: a body portion; a tip portion extending from the body portion and comprising a multi-lobed transverse cross-section, the monofilament bristle extending along a longitudinal axis; co-extruded first and second components, the first component being a first color and forming a first lobe of the multi-lobed transverse cross-section, the second component being a second color, which is different from the first color, and forming a second lobe of the multi-lobed transverse cross-section; and each of the first and second components forming a longitudinal section of the body portion, with an interface between the first and second components extending substantially parallel to the longitudinal axis.
In another aspect, the invention can be a monofilament bristle comprising: a body portion; a tip portion, the at least one monofilament bristle extending along a longitudinal axis; the body portion having a multi-lobed transverse cross-section and having an outer surface that is a first color; and the tip portion comprising a plurality of tips extending axially from the body portion, at least a first one of the plurality of tips having an outer surface that is a second color, which is different from the first color.
In further aspects, the invention can be an oral care implement comprising: a handle; a head coupled to the handle; and at least one bristle tuft extending from a first surface of the head, the at least one bristle tuft comprising at least one monofilament bristle as set forth above.
In a yet further aspect, the invention can be an oral care implement comprising: a handle; a head coupled to the handle; at least one bristle tuft extending from a first surface of the head, the at least one bristle tuft comprising at least one monofilament bristle bent into a U-shape and mounted to the head so that: (1) a first leg of the monofilament bristle extends from the front surface of the head and comprises a first body portion and a first tip portion; and (2) a second leg of the monofilament bristle extends from the front surface of the head and comprises a second body portion and a second tip portion; each of the first and second body portions of the at least one monofilament bristle having a multi-lobed transverse cross-section; and the first tip portion comprising a first plurality of tips axially protruding from the first body portion.
Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
The description of illustrative embodiments according to principles of the present invention is intended to be read in connection with the accompanying drawings, which are to be considered part of the entire written description. In the description of embodiments of the invention disclosed herein, any reference to direction or orientation is merely intended for convenience of description and is not intended in any way to limit the scope of the present invention. Relative terms such as “lower,” “upper,” “horizontal,” “vertical,” “above,” “below,” “up,” “down,” “top” and “bottom” as well as derivatives thereof (e.g., “horizontally,” “downwardly,” “upwardly,” etc.) should be construed to refer to the orientation as then described or as shown in the drawing under discussion. These relative terms are for convenience of description only and do not require that the apparatus be constructed or operated in a particular orientation unless explicitly indicated as such. Terms such as “attached,” “affixed,” “connected,” “coupled,” “interconnected,” and similar refer to a relationship wherein structures are secured or attached to one another either directly or indirectly through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise. Moreover, the features and benefits of the invention are illustrated by reference to the exemplified embodiments. Accordingly, the invention expressly should not be limited to such exemplary embodiments illustrating some possible non-limiting combination of features that may exist alone or in other combinations of features; the scope of the invention being defined by the claims appended hereto.
Referring to
The oral care implement 100 generally includes a body 101 comprising a handle 110 and a head 120. The body 101 generally extends from a proximal end 104 to a distal end 105. In certain embodiments, the body 101 may have a simple linear arrangement, and in certain other embodiments, the body 101 may have a non-linear structure.
The handle 110 extends from a proximal end 111 to a distal end 112 and the head 120 is coupled to the distal end 112 of the handle 110. The handle 110 is an elongated structure that provides the mechanism by which the user can hold and manipulate the oral care implement 100 during use. The handle 110 comprises a front surface 113 and an opposing rear surface 114. The handle 110 may include various contours for user comfort. In certain other embodiments the handle 110 can take on a wide variety of shapes, contours and configurations, none of which are limiting of the present invention unless so specified in the claims.
In the exemplified embodiment, the handle 110 is formed of a rigid plastic material, such as, for example without limitation, polymers and copolymers of ethylene, propylene, butadiene, vinyl compounds and polyesters such as polyethylene terephthalate. Of course, the invention is not to be so limited in all embodiments and the handle 110 may include a resilient material, such as a thermoplastic elastomer, as a grip cover that is molded over portions of or the entirety of the handle 110 to enhance the gripability of the handle 110 during use. For example, portions of the handle 110 that are typically gripped by a user's palm during use may be overmolded with a thermoplastic elastomer or other resilient material to further increase comfort to a user.
The head 120 of the oral care implement 100 is coupled to the handle 110 and comprises a front surface 122 and an opposing rear surface 123. In the exemplified embodiment, the head 120 is formed integrally with the handle 110 as a single unitary structure using a molding, milling, machining or other suitable process. However, in other embodiments the handle 110 and the head 120 may be formed as separate components which are operably connected at a later stage of the manufacturing process by any suitable technique known in the art, including without limitation thermal or ultrasonic welding, a tight-fit assembly, a coupling sleeve, threaded engagement, adhesion, or fasteners. In some embodiments the head 120 may be detachable from the handle 110. The head 120 may be formed of any one of the materials discussed above with regard to the handle 110.
In the exemplified embodiment, the head 120 of the oral care implement 100 is provided with a plurality of tooth cleaning elements 131 extending from the front surface 122. Furthermore, in the exemplified embodiment the tooth cleaning elements 131 are illustrated as a plurality of bristle tufts 133, and each bristle tuft 133 is illustrated as a plurality of monofilament bristles 135. In certain embodiments the exact structure, pattern, orientation and material of the tooth cleaning elements 131 are not to be limiting of the present invention unless so specified in the claims. In certain embodiments, the tooth cleaning elements 131 may include the bristle tufts 133 along with one or more other types of tooth cleaning elements. As used herein, the term “tooth cleaning elements” is used in a generic sense to refer to any structure that can be used to clean, polish or wipe the teeth and/or soft oral tissue (e.g. tongue, cheek, gums, etc.) through relative surface contact. Common examples of “tooth cleaning elements” include, without limitation, filament bristles, fiber bristles, nylon bristles, spiral bristles, rubber bristles, elastomeric protrusions, flexible polymer protrusions, combinations thereof and/or structures containing such materials or combinations. Suitable elastomeric materials include any biocompatible resilient material suitable for uses in an oral hygiene apparatus. To provide optimum comfort as well as cleaning benefits, the elastomeric material of the tooth or soft tissue engaging elements has a hardness property in the range of A8 to A25 Shore hardness. One suitable elastomeric material is styrene-ethylene/butylene-styrene block copolymer (SEBS) manufactured by GLS Corporation. Nevertheless, SEBS material from other manufacturers or other materials within and outside the noted hardness range could be used.
In certain embodiments, the bristle tufts 133, and other tooth cleaning elements 131, may be mounted on a head plate that forms part of the head 120 of the oral care implement 100. The head plate is formed separately and, at a later stage of the manufacturing process, is connected to the body 101 at a later stage of the manufacturing process to form the head 120. The head plate may be connected to the body 101, to form the head 120, by any suitable technique known in the art, including without limitation thermal or ultrasonic welding, any fusion techniques such as thermal fusion, melting, a tight-fit assembly, a coupling sleeve, threaded engagement, adhesion, or fasteners. In such an embodiment, the head plate may include a plurality of holes formed therethrough, with the bristle tufts 133 and any other included tooth cleaning elements 131 mounted to the head plate within the holes. This type of technique for mounting the bristle tufts 133 and other tooth cleaning elements to the head 120 via a head plate is generally known as anchor free tufting (AFT). Specifically, in AFT a plate or membrane is created separately from the head 120. The tooth cleaning elements 131 (such as the bristle tufts 133) are positioned into the head plate so as to extend through the head plate. The free ends of the other tooth cleaning elements 131 on one side of the head plate perform the cleaning function. The ends of the tooth cleaning elements 131 on the other side of the head plate are melted together by heat to be anchored in place. After the tooth cleaning elements 131 are secured to the head plate, the head plate is secured to the head 120 such as by ultrasonic welding. In certain embodiments, the portion of the bristle tufts 133 that are melted together comprise the anchor portion of the bristle tufts 133 and individual bristles.
Any suitable technique for attaching the bristle tufts 133 and other tooth cleaning elements 131 to the head may be used in the broad practice of this invention. Specifically, the tooth cleaning elements 131 of the present invention can be connected to the head 120 in any manner known in the art. For example, staples/anchors or in-mold tufting (IMT) could be used to mount the tooth cleaning elements 131. In certain embodiments, various combinations of stapled, IMT or AFT bristles may be used. Alternatively, the bristle tufts 133 may be mounted to tuft blocks by extending through suitable openings in the tuft blocks so that the base of the bristles is mounted within or below the tuft block. Such tuft blocks may then be connected to the to the body 101 to form the head 120 of the oral care implement 100.
Although not illustrated herein, in certain embodiments the head 120 may also include a soft tissue cleanser coupled to or positioned on its rear surface 123. An example of a suitable soft tissue cleanser that may be used with the present invention and positioned on the rear surface of the head 120 is disclosed in U.S. Pat. No. 7,143,462, issued Dec. 5, 2006 to the assignee of the present application, the entirety of which is hereby incorporated by reference. In certain other embodiments, the soft tissue cleanser may include protuberances, which can take the form of elongated ridges, nubs, or combinations thereof. Of course, the invention is not to be so limited and in certain embodiments the oral care implement 100 may not include any soft tissue cleanser.
Referring to both
The monofilament bristle 211 may be formed by coextruding first and second components, with the first component substantially forming the first lobe 223a and the second component substantially forming the second lobe 223b. In the central region 227 of at least the body portion 215, where the lobes 223a, 225b come together, an interface is created between the first and second components, and this interface extends substantially parallel to the longitudinal axis 219. Also within the central region 227, the first component and the second component may intermingle as a result of the coextrusion process. Although the lobes shown in
The first and second components of the monofilament bristle 211 may be formed from a wide variety of synthetic materials which may be coextruded. Examples of materials that may be used to form the monofilament bristle 211 include, but are not limited to, nylon, aramid, and other polyamide resins, polybutylene terephthalate (PBT), polypropylene terephthalate (polytrimethylene terephthalate, PPT or PTT), or polyethylene terephthalate (PET), and other polyester resins, polypropylene (PP), polyethylene (PE) and other polyolefin resins, and other publicly known synthetic resins can be used for bristles of a toothbrush.
In certain embodiments, the tips 225a, 225b on any one end of the monofilament bristle 211 may be formed by briefly immersing an end of the monofilament bristle 211 in a bath of a chemical solution, such as a caustic soda (NaOH). When the end is removed from the bath, the tips 225a, 225b are formed, each extending from one of the lobes 223a, 223b of the monofilament bristle 211 as shown in
Coloring agents may be added to one or both of the first and second components of the monofilament bristle 211. In certain embodiments, the only difference between the first and second components may be the inclusion of a coloring agent in one of the two components, while no coloring agent, or a different coloring agent, is included in the other component. The bristle tufts 133, in certain embodiments, may be formed from multiple ones of the monofilament bristles 211 that are formed to have the same coloration for both of the lobes 223a, 223b, or from monofilament bristle 211 that have a variety of coloration for both of the lobes 223a, 223b. In this way, a greater variety in the coloration of the tooth cleaning elements 131 may be obtained using such multicolored monofilament bristles 211. For example, in certain embodiments the coloring agents may be selected so that the colors of the two lobes are contrasting or complementary, with the color of the first component being different from the color of the second component. In certain other embodiments, the coloring agents may be selected so that the colors of the lobes 223a, 223b, and the bristle tufts 133, impart sentimental meaning to the user of a toothbrush, e.g., the colors are the same as the colors used by a favorite sports team, a high school, a college, a brand (which may be a brand other than the manufacturer or seller of the toothbrush), and the like.
In certain embodiments, the first and second components may be selected to vary the translucency/opaqueness of one or both of the lobes 223a, 223b. As used herein, a component forming part of the monofilament bristle 211 is translucent when the perceived color results from at least one color of visible light substantially passes through the component. Conversely, as used herein, a component forming part of the monofilament bristle 211 is opaque when the perceived color results from at least one color of visible light reflected or scattered off the surface of the component. In certain embodiments, a component forming part of the monofilament bristle 211 may be both partially translucent and partially opaque.
Referring to both
The monofilament bristle 251 may be formed by coextruding first and second components, with the first component substantially forming the first lobe 263a, the second component substantially forming the second lobe 263b, and a both the first component and the second component forming the third lobe 263c. In the central region 267 of the body portion 255, where the lobes 263a, 265b come together, and in the third lobe 263c, the first component and the second component may intermingle as a result of the coextrusion process. The first and second components of the monofilament bristle 251 may be coextruded as described above. In addition, the first and second components may include coloring agents and/or be selected to be translucent, opaque, or any desired combination thereof. The tips 265a, 265b, 365c of each lobe 263a, 263b, 263c may be formed in the manner described above. In the embodiment shown in
In certain embodiments, a third component may be coextruded with both the first and second components. In such embodiments, the third component may be a different color than both the first component and the second component. For example, in certain embodiments, the three-lobed monofilament bristle 251 of
A top part of a monofilament bristle 311 is shown in
Referring to both
The monofilament bristle 351 may be formed by coextruding first and second components, with the first component forming sheath 367 of both lobes 363a, 363b of the body portion 355 and the second component forming a core 369 of the body portion 355. One or both of the first and second components may have coloring agents added, and one or both of the first and second components may be selected to vary in translucency/opaqueness. By varying the color of one or both of the first and second components, for example, in certain embodiments the outer surface of the tips 365a, 365b may be a different color than the outer surface of the sheath 367 after the tips 365a, 365b are formed by immersion of an end of the monofilament bristle 351 in a chemical solution, as described above.
Although the lobes shown in
In certain embodiments, the core 369 of
Referring to both
The monofilament bristle 381 may be formed by coextruding first, second, and third components, with the first component forming sheath 397 of both lobes 393a, 393b of the body portion 385, the second component forming a first core 399 of the body portion 385, and the third component forming a second core 401 of the body portion. In this embodiment, at least two of the first, second, and third components may have coloring agents added, so that each of the first, second, and third components are of a different color. In addition, any one or more of the first, second, and third components may be selected to vary in translucency/opaqueness. By varying the color of the first, second, and third components, in certain embodiments the outer surface of the tips 395a, 395b may be a different color than the outer surface of the sheath 397, after the tips 395a, 395b are formed by immersion of an end of the monofilament bristle 381 in a chemical solution, as described above, and in addition, the outer surface of the tips 395a, 395b may be different colors from each other.
Although the lobes shown in
An alternative embodiment of a cross section 381 for the body portion of a monofilament bristle is shown in
Another alternative embodiment of a cross section 391 for the body portion of a monofilament bristle is shown in
Another alternative embodiment of a cross section 401 for the body portion of a monofilament bristle is shown in
Those of skill in the art will recognize that the concepts exhibited by the embodiments shown in
A second embodiment of an oral care implement 500 is illustrated in
In the embodiment shown in
The at least the body portions 551, 553 of the monofilament bristle 535 have a multi-lobed cross section, such as any of those shown in
In certain embodiments, the monofilament bristle 535 may have a multi-lobed cross section formed using two or more components, each component forming at least one of the lobes, such as described above in connection with
In certain embodiments, the monofilament bristle 535 may have a multi-lobed cross section formed using two or more components, with one of the components forming a sheath in the body portions 551, 553, and another of the components forming a core in the body portions 551, 553, such as described above in connection with
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| PCT/CN2015/083481 | 7/7/2015 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
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| WO2017/004792 | 1/12/2017 | WO | A |
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| 20180206627 A1 | Jul 2018 | US |
