US2554777A - Method and means for rounding off and polishing the ends of thermoplastic brush bristles - Google Patents

Method and means for rounding off and polishing the ends of thermoplastic brush bristles Download PDF

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Publication number
US2554777A
US2554777A US153034A US15303450A US2554777A US 2554777 A US2554777 A US 2554777A US 153034 A US153034 A US 153034A US 15303450 A US15303450 A US 15303450A US 2554777 A US2554777 A US 2554777A
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US
United States
Prior art keywords
brush
bristles
bristle
pins
tips
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US153034A
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English (en)
Inventor
Dangin Roger
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La Brosse et Dupont SA
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La Brosse et Dupont SA
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Publication of US2554777A publication Critical patent/US2554777A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0284—Bristles having rounded ends
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D9/00—Machines for finishing brushes
    • A46D9/02—Cutting; Trimming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/44—Arrangements for feeding power to a repeater along the transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/10—Intermediate station arrangements, e.g. for branching, for tapping-off
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/66—Processes of reshaping and reforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/806—Flash removal

Definitions

  • This invention relates to brushes of the type in which the bristles are formed from tough synthetic fibre such as polyamide filaments and similar thermo-plastic synthetic materials, and provides an improved method and apparatus for imparting a satisfactory finish to the bristles of such a brush.
  • Another object is to provide such a finish Without incurring any loss of the bristle material, as occurs when using a cutting or an abrading process for a similar purpose.
  • a further object is to provide a method of rounding off and polishing the ends of thermoplastic bristles in a single quick operation.
  • Another object is to provide such a method which makes use of the inherent thermo-plasticity of the bristle material.
  • Another object is to provide comparatively simple apparatus for imparting a highly satisfactory rounded and polished finish to the bristleends of such a brush, and one which is capable of ready adjustment for controlling Within reasonable limits the shape imparted to the bristleends, and for making it possible to handle various sizes and shapes of brushes.
  • the invention essentially provides a method of simultaneously rounding off and polishing the free ends of bristles made of a thermo-plastic material which comprises subjecting the end portions or" said bristles as mounted on the brush to the action of finely polished rounded elements having a high rate of relative motion with respect to said bristles, thus locally to generate at the ends of the bristles an amount of heat "suflicient to cause a softening of the material thereof and at the same time to exert 'a form- 'ing action on the softened material adapted to round off and polish the ends of said bristles.
  • the method of the invention may be used to polish the ends of bristles previously rounded off, it will be of greatest value when applied di-- rectly after the curing operation, inasmuch as it is self-sufiicient and makes it possible to round off and polish the end of each bristle, removing all sharp edges and any loose particles or fibres that may and usually do occur at the ends of the fibres.
  • the method as just defined is entirely distinct from an abradi'ng process, in that the action of the rapidly moving elements in contact with the bristle ends is not to strip or chip off particles of the bristle materialby friction but rather to exert a hammering and rubbing action thereon effective first to generate suflicient heat to bring the thermo-plastic material to its softening point, and then con tinue to exert such hammering and/or rubbing action to form the softened material to a rounded shape and at the same time polish the rounded ends thus obtained.
  • the method of the invention contrarily to what would be true in the case of an abrading process, does not result in any waste of thermo-plastic material undergoing treatment. It will also be seen that this method makes use of the inherent thermo-plasticity of the material being treated.
  • the invention further provides apparatus for carrying the above-defined method into practice.
  • This apparatus essentially comprises a rotary tool or support carrying a set of shaping elements made of' a hard material, finely polished and having rounded ends, so disposed on said rotary support that their rounded and polished ends will lie on a surface of revolution having as a generatrix curve the cross-sectional contour of the brush to be treated, means for imparting a rapid rotation to said support and means for applying the free bristle surface of the brush against the surface generated by the rotation of the-ends of the elements.
  • said shaping elements comprise pins of hardened polished steel provided with rounded ends substantially semi-spherical or paraboloidal in shape.
  • the rotary support may desirably be formed as a disc, and the tool-supporting surface of this disc may be flat in the case flat brushes are to be treated, concave where the brushes are convex and vice versa.
  • the pins are in any case arranged in a uniformly spaced array over an annular area ofthe disc adjacent to the periphery thereof and having a radial 3 extent no smaller than the length of the bristle surface to be treated.
  • the tool elements used comprise rounded pins, as just described, in order to exert a more penetrating action and to act in the manner of comb teeth on the bristles of the brush,
  • tool elements in the form of radially-extending upstanding ribs or blades having rounded top edges may be used, or further milled projections formed with rounded and polished edges.
  • the brush is preferably caused to revolve during the treatment at a slow rate about an axis preferably extending through the centre of and normal to the bristle surface, providing of course that the surface of the brush is of such shape as to allow of such rotation.
  • the tool is preferably caused to act successively in at least two opposite directions, the direction of rotation of the tool assembly being reversed; still more preferably, the action of the tool is successively applied in four directions; for this purpose at least two tool assemblies may be used operating in concurrent directions and each successively rotated in reverse directions.
  • Fig. 1 is a vertical section,-in diagrammatic form, of one embodiment of a device according to the invention, the brush and the supporting means therefor being shown in elevation,
  • Fig. 2 is half an overhead plan view of a first embodiment of the rounding and polishing tool assembly, only part of the blunt pins thereof being shown,
  • Fig. 3 is a vertical section on an enlarged scale of a fragment of the tool assembly shown in Figs. 1 and 2 illustrating in greater detail the shape and arrangement of the pins,
  • Fig. 4 is an axial section of a form of tool assembly usable in connection with a.flat brush
  • Figs. 5 and 6 are similar views of tool ass mblies usable respectively where concav and convex brushesare to be treated, I
  • Fig. 7 is a similar view of an alteina tive form simultaneously and not of limtation, with reference to the ac- '4 of tool assembly more specifically for a concave brush,
  • Fig. 8 is half an overhead view of the tool assembly of Fig. 7, and
  • Figs. 9 and 10 are enlarged fragmentary views of different shapes that may be imparted to the tips of the individual bristles when using the method of the invention.
  • the shaft is supported in bearings 3 and is adapted to have a rapid rotation imparted to it from any suitable drive means not shown.
  • a multiplicity of cylindrical pins 4 are fitted normally to the surface of the surface Ia and are formed with tips 5 of generally spherical or paraboloidal form.
  • the pins are made of a hard grade of steel, carefully heat-treated and polished and are disposed in a regular pattern, as shown in Fig. 2, the free spacing between adjacent pins being substantially equal to about twice the diameter of each pin.
  • the pins are caused to project no more than a few millimeters deep in between the bristles of the brush; accordingly the pins may be made quite short, say about 6 to 8 mm. long, so as not to be subjected to substantial bending strains in operation and to act upon the bristles to be treated in the manner of a comb.
  • the surface la is determined with due consideration to the length of the pins 4, in such a way that the tips 5 of the pins will lie over a spherical zon generated by rotation of the cross-sectional contour of the brush about the axis 6.
  • a suitable clamping member I for holding th brush 8 during the finishing operation is secured to one end of a shaft 9 supported in bearings I0, so disposed that the centre axis II of the shaft will extend through the centre of the sphere of which the surface Ia forms a part.
  • Any suitable means such as an operating crank I2 are provided to enable a slow rotation to be imparted to the brush-holder 1 with the brush 8 therein about the axis I I during operation of the tool.
  • the shaft 9 is mounted in the bearings In in such a manner as to allow some amount of axial displacement of the shaft in said bearings.
  • the above-described apparatus operates as follows: The crank handle I2 is rotated back to raise the brush holder I and the brush 8 to be treated is clamped in the holder 1. Then the tool-support I is set into rapid rotation, if stationary. By way of indication, a rate of 5,000 R. P. M. or so has been found satisfactory in the case of a tool support in which the annular pin-supporting area has a mean diameter of mm.
  • the crank-handle I2 is actuated to lower the bristle surface of the brush 8 into engagement with the ends of the pins 4 and cause said pins to penetrate by a few millimeters in between the bristles.
  • a slow rotary motion is imparted to it in order to cause the brush to describe at least one complete Ievolutionwhile in engagement with the pins.
  • the degree to which the pins project into the bristles may be adjusted preliminarily through the use of any suitable known device adapted to limit the axial. displacement-.101? the shaft 9, said adjustment being so made as to allow the pins 6 to reach the shortest bristles of the brush.
  • the absolute velocity of the point of: contact of a pin with the end: of a bristlev may be split into a component normal. to the common tangent plane to both surfaces at that point and a component lyin in said tangent plane.
  • the normal component exerts a hammering action effective to form the bristleends, while the tangential component produces a polishing or smoothing effect, and both these components act simultaneously to raise locally the temperature of the thermoplastic to its softening point.
  • the particular form of the pin tips, and especially the depth to which these pins exert an effective action with respect to the bristle tips may alter in a substantial manner the final shape imparted to the tip of each bristle.
  • the bristle will tend to assume a blunt, fiat shape shown in Fig. 9.
  • the pins are small and their depth of penetration great, then the bristle will tend to assume a comparatively tapered form as shown in Fig. 10.
  • Tool elements other" than the pins may be used to perform the specific softening, forming and smoothing actions of the invention. While pins have generally been found to afford best result, especially in that they act on a greater peripheral area of the bristle tip, the forming elements may for instance be provided in the form of upstanding blades having a rounded top edge.
  • Figs. '7 and 8 illustrate in elevation and Plan respectively a tool assembly according to the invention which comprises a disc I rigid with its shaft 2 driven in rotation by any suitable means, said disc having secured thereon by any suitable means radially-extending upstandin blade elements l3 normal to the sur face ofthe disc I and provided with a rounded active top edge I311.
  • the blades are arranged in a peripheral annular array and their active top edges are accurately complementary to the contour of the brush to be treated.
  • the forming elements may be provided in the form of projections obtained by milling a suitable supporting surface, the ends of said. projections being rounded and then carefully polished. Any other suitable means may of course be used, within the scope of the invention, to provide the requisite forming projections on a rapidly moving surface substan tially reproducing the contour of the brush to be treated as seen in the direction of displacement of said surface.
  • the method of the invention will be applied in a plurality of successive steps, the tool being first rotated in one direction then in the opposite direction to cause the pins to act at least in two different directions on each bristle.
  • the rounded form of the bristle tips will in such a case be considerably improved if use is made of two. tools acting in directions substantially at right angles to each other and each successively driven in two reverse directions, thereby obtaining four dififerent directions for the action of the tools on the bristles.
  • the tool elements such as the pins, blades or projections described, may be provided on a supporting surface other than a disc, for instance on a cylinder or other surface of revolution. More specifically, in the case of brushes having a sinuous cross-sectional contour, good results will be obtained by first using a disc provided with pins acting on the bristles transversely of the brush, and then using a cylinder provided with pins or blades acting on the bristles in a longitudinal direction.
  • the manual operating crank-handle I 2 may be replaced by an automatic device being adapted to bring the brush into engagement with the tool assembly and then impart to the brush a complete revolution while maintaining itin engagement therewith, and finally to. disengage the brush after one or more: revolutions of the brush have been made.
  • Method of finishing the tips of thermoplastic fibre bristles on a brush which comprises subjecting said bristle-tips over a predetermined length thereof to contact with a plurality of hard blunt polished surfaces and imparting a rapid relative displacement between said surfaces and said bristles in a direction generally normal to said bristles at a rate suificient to raise locally the temperature of said bristle-tips substantially to the softening point of said thermo-plastic fibre.
  • Method of finishing the tips of thermoplastic fibre bristles on a brush which comprises subjecting said bristle-tips to contact with a plurality of hard blunt polished surfaces, imparting a rapid relative displacement between said surfaces and said bristles on a surface generally normal to said bristles at a rate suiiicient to raise locally the bristle-tip temperature to softening point, and concurrently imparting to said brush a slower bodily rotation about an axis parallel to the general direction of its said bristles to produce a uniform finishing action around each bristle.
  • Method of finishing the tips of thermoplastic fibre bristles on a brush having an arcuate cross-sectional bristle contour which comprises subjecting said bristle-tips to contact with a plurality of hard blunt polished surfaces, imparting a rapid relative displacement to said surfaces with respect to said bristles in a first direction generally normal to said bristles, then reversing said relative displacement, the rate of said displacement being sufficiently high to raise the bristle-tip temperature substantially to softening point.
  • Method of finishing the tips of thermoplastic fibre bristles on a brush which comprises subjecting said bristle-tips to contact with a plurality of hard blunt polished surfaces and imparting rapid relative displacements to said surfaces with respect to said bristles on a surface generally normal to said bristles in a plurality of successive directions, the rates of all said relative displacements being high enough to locally raise the bristle-tip temperature to softening point.
  • Method of rounding off and polishing the bristle-tips on a brush provided with thermoplastic bristles which comprises subjecting a predetermined length of said bristle-tips to contact with a plurality of hard blunt highlypolished surfaces and imparting a relative displacement at a tangential rate of about 40 metres per second to said surfaces with respect to said bristles, whereby the bristle-tips are brought to a softening temperature and are simultaneously formed to a blunt shape and smoothed by said surfaces.
  • Device for finishing the thermo-plastic bristle-tips on a brush of the type described which comprises in combination a tool support mounted for rotation, means imparting to said support a rapid rotation about an axis, tool elements mounted on said support and presenting a multiplicity of hard blunt polished projecting surfaces lying on an envelope surface of revolution having as a generatrix a crosssectional contour of said brush, and means for holding said brush with its bristle tips in engagement with said surfaces.
  • tool elements comprise cylindrical pins made of hardened steel with polished blunted ends of suflicient di- 8 ameter relatively to their free height to be subjected to no appreciable bending in operation.
  • thermo-plastio bristle-tips on a brush
  • a rotary support and means for imparting rapid rotation thereto said support including an annular surface centred on the axis of rotation, a plurality of elements mounted on said annular surface and having hard blunt smooth surfaces projecting therefrom the tops of said surfaces describing in the rotation of said support a surface of revolution having a generatrix corresponding to a cross-sectional configuration of said brush, and means for holding said brush over said surface with its bristle-tips engaged over a predetermined end length thereof against said projecting surfaces.
  • a rotary support and means for imparting rapid rotation thereto said support including an annular surface centred on the axis of rotation, a plurality of hard blunt polished pins upstanding from said annular surface, means for holding said brush above said surface with its bristle-tips engaging said pins, and means for slowly rotating said brush with its bristles thus engaged, about an axis generally parallel to said bristles.
  • a rotary support including a part-spherical annular peripheral surface complementary to said bristled surface centred on the axis of rotation of said support, hard blunt polished pins all equal in height upstanding from said annular surface, means for holding said brush with its bristles engaged over a predetermined depth on said pins with the normal to said bristled surface through the centre thereof extending substantially through the centre of said part-spherical annular surface, and means for imparting a slow rotation to said brush about said normal.
  • thermo-plastic bristles on a brush cylindrical support
  • means for imparting rapid rotation to said support about'its cylinder axis a multiplicity of hard blunt polished surfaces projecting radially from said cylindrical support, and means for holding a brush with its bristles engaging said surfaces over a predetermined depth.
  • a rotary tool and means for imparting rapid rotation thereto about its axis said tool being formed with hard blunt polished projecting surfaces lying generally on a surface of revolution having as a generatrix a crosssectional contour of said brush, and means for holding said brush with its bristles in engagement over a predetermined depth with said surfaces.
  • thermo-plastic bristles on a brush having bristles of more than one length, rotary means and means for imparting rotation thereto, and a plurality of hard blunt polished surfaces projecting from said rotary means and having more than one length, the ends of said projecting surfaces all lying in the vicinity of a mean surface of revolution corresponding to the mean cross-sectional contour of said brush, and means for holding said brush with its bristles engaging said projecting surfaces in a relative position thereto such that the shorter projections will engage the longer bristles and that the longer projections will engage the shorter bristles.
  • a rotary means means for imparting rapid rotation thereto, a plurality of hard blunt projections on said rotary means lying in a general plane corresponding with the cross-sectional configuration of the brush, brushholding means adapted to hold said brush with its bristles in engagement over a predetermined depth with said projections, a shaft secured to said brush-holder means normally to the general surface of the brush, means supporting said shaft for rotation and limited axial displacement, manual means for rotating and axially displacing said shaft and means positively restricting the axial displacement of said shaft to restrict the depth of engagement of said bristles with said projections.

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  • Computer Networks & Wireless Communication (AREA)
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US153034A 1950-01-11 1950-03-31 Method and means for rounding off and polishing the ends of thermoplastic brush bristles Expired - Lifetime US2554777A (en)

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365529A (en) * 1966-08-03 1968-01-23 Dieffenbach Percy Artificial tree limb tapering method
US4441227A (en) * 1981-03-18 1984-04-10 Argembeau Etienne Y D Brushes and the manufacture thereof
EP0779046A1 (en) * 1995-12-13 1997-06-18 G.B. Boucherie, N.V. Method and device for rounding fibres of brushes
WO1999007255A1 (en) * 1997-08-12 1999-02-18 G.B. Boucherie N.V. A method of endrounding loose fibres
US5893612A (en) * 1995-12-13 1999-04-13 Firma G.B. Boucherie, Naamloze Vennootschap Apparatus and method for rounding fiber ends of brushes
US5927819A (en) * 1997-02-28 1999-07-27 Gillette Canada Inc. Method and device for trimming and end-rounding bristles
US6322152B2 (en) * 1997-12-22 2001-11-27 Mcneil-Ppc, Inc. Method of making a toothbrush
US20060052806A1 (en) * 2002-09-20 2006-03-09 Colgate-Palmolive Company Oral care implement
US20060129171A1 (en) * 2004-12-15 2006-06-15 Colgate-Palmolive Company Oral care implement
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US7721376B2 (en) 2002-09-20 2010-05-25 Colgate-Palmolive Company Oral care implement
US7836539B2 (en) 2002-08-09 2010-11-23 Colgate-Palmolive Company Oral care implement
US7841041B2 (en) 2002-08-09 2010-11-30 Colgate-Palmolive Company Oral care implement
US7845042B2 (en) 2002-08-09 2010-12-07 Colgate-Palmolive Company Oral care implement
US7908699B2 (en) 2001-07-03 2011-03-22 Colgate-Palmolive Company Oral care implement
US7954191B2 (en) 2002-09-27 2011-06-07 Colgate-Palmolive Company Toothbrush
US7962991B2 (en) 2002-09-20 2011-06-21 Colgate-Palmolive Company Toothbrush
US7975343B2 (en) 2002-09-20 2011-07-12 Colgate-Palmolive Company Toothbrush
US8091170B2 (en) 2002-08-09 2012-01-10 Colgate-Palmolive Company Oral care implement
US8151397B2 (en) 2002-08-09 2012-04-10 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US8201298B2 (en) 2007-02-09 2012-06-19 Colgate-Palmolive Company Toothbrush with low profile head
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US8393042B2 (en) 2002-08-09 2013-03-12 Colgate-Palmolive Company Oral care implement
US8523888B2 (en) 2006-12-18 2013-09-03 Colgate-Palmolive Company Oral care implement
US8806695B2 (en) 2002-08-09 2014-08-19 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US8876221B2 (en) 2002-08-09 2014-11-04 Colgate-Palmolive Company Oral care implement
US8990996B2 (en) 2002-08-09 2015-03-31 Colgate-Palmolive Company Toothbrush
BE1023106B1 (de) * 2015-11-06 2016-11-23 Bart Gerard Boucherie Verfahren zum mechanischen Anspitzen von Borsten und Schleifvorrichtung
EP3100639A1 (en) 2015-06-05 2016-12-07 The Procter and Gamble Company Device for filament end-rounding and a method for end-rounding (tooth)brush filaments

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Title
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Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365529A (en) * 1966-08-03 1968-01-23 Dieffenbach Percy Artificial tree limb tapering method
US4441227A (en) * 1981-03-18 1984-04-10 Argembeau Etienne Y D Brushes and the manufacture thereof
US4592594A (en) * 1981-03-18 1986-06-03 Argembeau Etienne Y D Brushes and the manufacture thereof
US5893612A (en) * 1995-12-13 1999-04-13 Firma G.B. Boucherie, Naamloze Vennootschap Apparatus and method for rounding fiber ends of brushes
BE1009884A3 (nl) * 1995-12-13 1997-10-07 Boucherie Nv G B Werkwijze en inrichting voor het afronden van borstelvezels.
EP0779046A1 (en) * 1995-12-13 1997-06-18 G.B. Boucherie, N.V. Method and device for rounding fibres of brushes
US5927819A (en) * 1997-02-28 1999-07-27 Gillette Canada Inc. Method and device for trimming and end-rounding bristles
WO1999007255A1 (en) * 1997-08-12 1999-02-18 G.B. Boucherie N.V. A method of endrounding loose fibres
AU744909B2 (en) * 1997-08-12 2002-03-07 G.B. Boucherie N.V. A method of endrounding loose fibres
US6372163B1 (en) * 1997-08-12 2002-04-16 G. B. Boucherie N. V. Method of endrounding loose fibers
US6322152B2 (en) * 1997-12-22 2001-11-27 Mcneil-Ppc, Inc. Method of making a toothbrush
US7908699B2 (en) 2001-07-03 2011-03-22 Colgate-Palmolive Company Oral care implement
US8079110B2 (en) 2001-07-03 2011-12-20 Colgate-Palmolive Company Oral care implement
US8990996B2 (en) 2002-08-09 2015-03-31 Colgate-Palmolive Company Toothbrush
US8091170B2 (en) 2002-08-09 2012-01-10 Colgate-Palmolive Company Oral care implement
US10512323B2 (en) 2002-08-09 2019-12-24 Colgate-Palmolive Company Oral care implement
US9603441B2 (en) 2002-08-09 2017-03-28 Colgate-Palmolive Company Toothbrush
US9545148B2 (en) 2002-08-09 2017-01-17 Colgate-Palmolive Company Oral care implement
US9167888B2 (en) 2002-08-09 2015-10-27 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US8876221B2 (en) 2002-08-09 2014-11-04 Colgate-Palmolive Company Oral care implement
US7836539B2 (en) 2002-08-09 2010-11-23 Colgate-Palmolive Company Oral care implement
US7841041B2 (en) 2002-08-09 2010-11-30 Colgate-Palmolive Company Oral care implement
US7845042B2 (en) 2002-08-09 2010-12-07 Colgate-Palmolive Company Oral care implement
US8839481B2 (en) 2002-08-09 2014-09-23 Colgate-Palmolive Company Oral care implement
US8806695B2 (en) 2002-08-09 2014-08-19 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US8800093B2 (en) 2002-08-09 2014-08-12 Colgate-Palmolive Company Oral care implement
US8561247B2 (en) 2002-08-09 2013-10-22 Colgate-Palmolive Company Oral care implement
US8393042B2 (en) 2002-08-09 2013-03-12 Colgate-Palmolive Company Oral care implement
US7975346B2 (en) 2002-08-09 2011-07-12 Colgate-Palmolive Company Oral care implement
US8151397B2 (en) 2002-08-09 2012-04-10 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US7962991B2 (en) 2002-09-20 2011-06-21 Colgate-Palmolive Company Toothbrush
US20100004666A1 (en) * 2002-09-20 2010-01-07 Colgate-Palmolive Company Oral Care Implement
US8042214B2 (en) 2002-09-20 2011-10-25 Colgate-Palmolive Company Oral care implement
US7322067B2 (en) 2002-09-20 2008-01-29 Colgate-Palmolive Company Oral care implement
US9872558B2 (en) 2002-09-20 2018-01-23 Colgate-Palmolive Company Oral care implement
US7975343B2 (en) 2002-09-20 2011-07-12 Colgate-Palmolive Company Toothbrush
US8522386B2 (en) 2002-09-20 2013-09-03 Colgate-Palmolive Company Oral care implement
US9655436B2 (en) 2002-09-20 2017-05-23 Colgate—Palmolive Company Oral care implement
US20070101525A1 (en) * 2002-09-20 2007-05-10 Hohlbein Douglas J Oral Care Implement
US7594293B2 (en) 2002-09-20 2009-09-29 Colgate-Palmolive Co. Oral care implement
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