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EP0955837B2 - Toothbrush - Google Patents

Toothbrush Download PDF

Info

Publication number
EP0955837B2
EP0955837B2 EP98956668A EP98956668A EP0955837B2 EP 0955837 B2 EP0955837 B2 EP 0955837B2 EP 98956668 A EP98956668 A EP 98956668A EP 98956668 A EP98956668 A EP 98956668A EP 0955837 B2 EP0955837 B2 EP 0955837B2
Authority
EP
European Patent Office
Prior art keywords
tufts
bristles
head
inches
tuft
Prior art date
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
EP98956668A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0955837A1 (en
EP0955837B1 (en
EP0955837A4 (en
Inventor
Donna Beals
Maisie Wong-Paredes
Thomas Craig Masterman
Michael Roberts
Bradley Castillo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gillette Canada Inc
Original Assignee
Gillette Canada Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26873851&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0955837(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US09/177,991 external-priority patent/US6308367B1/en
Application filed by Gillette Canada Inc filed Critical Gillette Canada Inc
Priority to EP02012748A priority Critical patent/EP1240847B1/en
Priority to EP08022193A priority patent/EP2052643A3/en
Publication of EP0955837A1 publication Critical patent/EP0955837A1/en
Publication of EP0955837A4 publication Critical patent/EP0955837A4/en
Publication of EP0955837B1 publication Critical patent/EP0955837B1/en
Application granted granted Critical
Publication of EP0955837B2 publication Critical patent/EP0955837B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A46B9/045—Arranged like in or for toothbrushes specially adapted for cleaning a plurality of tooth surfaces simultaneously
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A46B5/026—Grips or handles having a nonslip section
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • the invention relates generally to the field of oral care, and in particular to toothbrushes. More particularly, the invention relates to a toothbrushes with a three-dimensional bristle profile to provide improved cleaning of interproximal and gingival marginal regions of teeth.
  • Toothbrushing and flossing are fundamental steps in achieving good oral hygiene.
  • the practice of flossing has not met with widespread acceptance among the general populace even though it is acknowledged by the general populace that flossing is something that should be completed as part of good oral hygiene.
  • people who floss oftentimes do not perform adequate flossing in hard to reach areas of the mouth.
  • most commercially available toothbrushes clean the outer buccal face of teeth adequately, they fail to provide improved cleaning of plaque and debris from the gingival margin, interproximal areas, lingual surfaces and other hard to reach areas of the mouth.
  • toothbrushes do not adequately clean the rear-most molars (e.g. wisdom teeth or second molars) is that the one or more tufts secured to the toothbrush head at a location most distal from the toothbrush handle are not angled towards a direction along which the head extends from the handle. As such, these tufts cannot extend far enough past the end of the head of the toothbrush to sufficiently clean the molar teeth in the back of the mouth.
  • molars e.g. wisdom teeth or second molars
  • U.S. 4,672,706 forms the preamble of claim 1.
  • U.S. 5,628,082 , U.S. 5,446,940 and FR 2,624,360 disclose toothbrushes including a most distal tuft which is angled in a direction away from the handle. However, such articles do not also have a tuft angled in the opposite direction for enhanced interdental cleaning.
  • prior art toothbrushes disclose tufts of bristles having at most three different types of cross-sections.
  • a brush e.g. the outer buccal face, gingival margin, interproximal areas, lingual surfaces and rearward most molars.
  • prior art brushes do not provide tufts of sufficiently varied cross-section specifically designed to clean all areas of the teeth.
  • the present invention is directed to overcoming one or more of the problems set forth above and provides a toothbrush according to claim 1.
  • Preferred embodiments are defined in the dependent claims.
  • the tuft is able to extend past the end of the head of the toothbrush and thus clean molars in the back of the mouth in a more sufficient manner.
  • a toothbrush including a handle, a head extending from the handle, and a plurality of tufts of bristles secured to the head.
  • One of the tufts is secured to the head at a location such that no other tuft is secured to the head at a location which is more distal from the handle than the location where the one tuft is secured to the head.
  • the one tuft is tilted away from the handle towards a direction along which the head extends from the handle.
  • the one tuft is angled by about 81 degrees or less relative to an imaginary line which is tangent to or co-planar with a surface of the head through which the one tuft is secured to the head.
  • angled tufts which vary in their length, cross-section or combinations thereof, allows such angled tufts to clean more than one part of the teeth. For example, one type of angled tuft will clean the buccal face of teeth while another type of angled tuft will clean the interproximal areas of the teeth.
  • these tufts can clean all areas of the teeth (e.g. the outer buccal face, gingival margin, interproximal areas, lingual surfaces and rearward most molars) properly.
  • a toothbrush 10 includes a handle portion 12 and a head portion 14 which extends from the handle in a direction D.
  • the overall length of toothbrush 10 is preferably about 19.6 cm. (about 7.7) inches while the width of head 14 at its widest portion is preferably about 1.3 cm. (about 0.5 inches).
  • a main portion 16 of handle 12, and head 14 are made of a unitary piece of polypropylene. Remaining portions of handle 12, including thumb gripping portion 18, optional Trademark 24 (preferably about 2.1 cm.
  • finger gripping portion 20 are preferably made of a thermoplastic elastomer, preferably kraton rubber (a hydrogenated or unhydrogenated oil filled block co-polymer of styrene and butadiene or isoprene having a shore A hardness of between about 5 and about 70).
  • Thumb gripping portion 18 and a portion of finger gripping portion 20 have a series of seventeen raised ribs 22 which aid in the gripability of the handle.
  • Ribs 22 are preferably 0.13 cm. (.05 inches) in width.
  • a plurality of tufts 26 of bristles are secured to head 14 of the toothbrush.
  • Each tuft is made up of a large number of bristles, and all of the bristles are preferably end-rounded.
  • a first type of tuft, type 28 is made up of bristles formed of poly-butylene-terephthalate (PBT) with an abrasive such as kaolin clay particles mixed throughout the PBT. These bristles are between about .013 to .023 cm. (about .005 to .009 inches) in diameter, preferably .018 cm. (.007 inches) in diameter. The length of these bristles, measured from surface 30 of head 14, is about 1.18 cm. (.440 inches).
  • the cross-sectional tufted area for tuft 28 is about .2406 cm. 2 (about 0.0373 square inches), providing a tuft volume measured from the head surface of about .2687 cm.
  • a second type of tuft, type 32 is made up of nylon IndicatorsTM type bristles which are formed of 6.12 nylon and colored blue on their external surface. As is well known in the art, the blue coloring on these bristles is slowly worn away as the brush is used over time to indicate the extent to which the toothbrush is worn. These bristles are between about .013 to .023 cm. (about .005 to .009 inches) in diameter, preferably .018 cm. (.007 inches) in diameter. The length of these bristles, measured from surface 30 of head 14, is about .889 cm. (about .350 inches). The cross-sectional area of each tuft 32 is about 0.0290 cm. 2 (about 0.0045 square inches). As shown in FIG. 6 , type 32 tufts have a round cross-section. There are between 8 and 12 type 32 tufts secured to head 14.
  • a third type of tuft, type 34 is made up of bristles formed of PBT with an abrasive such as kaolin clay particles mixed throughout the PBT. These bristles are between about .013 to .023 cm. (about .005 to .009 inches) in diameter, preferably .018 cm. (.007 inches) in diameter. The length of these bristles, measured from surface 30 of head 14, is about 1.18 cm. (about .440 inches). The cross-sectional area of each tuft 34 is about .0174 cm. 2 (about 0.0027 square inches). There are between eight and twelve type 34 tufts secured to head 14. As shown in FIG. 6 , type 34 tufts are rectangular in shape with rounded ends.
  • a fourth type of tuft, type 36 is made up of bristles formed of PBT with an abrasive such as kaolin clay particles mixed throughout the PBT. These bristles are between about .013 to .023 cm. (about .005 to .009 inches) in diameter, preferably .018 cm. (.007 inches) in diameter. The length of these bristles, measured from surface 30 of head 14, is about 1.12 cm. (about .440 inches). The cross-sectional area of each tuft 36 is about 0.0258 cm. 2 (about 0.0040 square inches). There are between four and six type 36 tufts secured to head 14. As shown in FIG. 6 , type 36 tufts are rectangular in shape with rounded ends, and are wider across the head than type 34 tufts.
  • a fifth and final type of tuft, type 38 is made up of bristles formed of PBT with an abrasive such as kaolin clay particles mixed throughout the PBT. These bristles are between about .013 to .023 cm. (about .005 to .009 inches) in diameter, preferably .015 cm. (.006 inches) in diameter. The length of these bristles, measured from surface 30 of head 14, is about .889 cm. (about .350 inches). The cross-sectional area of each tuft 38 is about .0542 cm. 2 (about 0.0084 square inches). There are between four and six type 38 tufts secured to head 14. As shown in FIG. 6 , type 36 tufts are rectangular in shape with rounded ends, and are wider than type 36 tufts.
  • tuft type 28 has a cross-section which is more than four times as large as any other tuft secured to head 14.
  • any of the bristles attached to head 14 could be made from, for example, PBT with or without an abrasive such as kaolin clay, 6.12 nylon with or without an abrasive, or nylon IndicatorTM material with or without an abrasive.
  • the bristles within a tuft and between tufts can have varying lengths, diameters, cross-sectional shapes, cross-sectional areas, colors and be made of differing materials.
  • all of the tufts on head 14 are angled either towards direction D or towards the direction opposite of direction D by preferably less than about 81 degrees, more preferably between about 69 degrees to about 81 degrees, and most preferably by about 75 degrees, relative to an imaginary straight line 40 which is tangent to surface 30 of head 14. If surface 30 was flat, rather than curved, then line 40 would be co-planar with surface 30.
  • Two outer rows of tufts 42 are angled towards direction D away from handle 12.
  • An inner row of tufts 44 are angled opposite direction D towards handle 12 with the exception of large tuft 28 which is tilted towards direction D away from handle 12.
  • Toothbrush 10 can be made by the following process which is generally understood by those skilled in the art.
  • Each of the tufts of bristles are formed by gathering together a desired amount of bristles of a selected material, length and diameter.
  • the tufts are then inserted into apertures in part of a mold of an injection molding machine.
  • An end of the tuft which is or will project into the mold cavity is then melted to join the bristles together in a fused mass or ball at that end of the tuft.
  • the mold part bearing the tufts is then joined with another portion of the mold which together define a cavity used to form main portion 16 of the toothbrush.
  • the fused masses of the tufts are located just within the cavity.
  • Polypropylene is then injected into the cavity to form portion 16 of toothbrush 10.
  • the polypropylene is then cooled at which point the partially finished toothbrush is moved to a second injection molding station.
  • the cooled, hardened polypropylene secures the fused masses of the tufts to head 14 of the toothbrush.
  • the partially finished brush is put into a second mold having cavities to form the thumb gripping portion 18, trademark 24 and finger gripping portion 20.
  • a thermoplastic elastomer is then injected into the mold after which the elastomer is cooled and finished toothbrush 10 is removed from the mold. The toothbrush is then packaged.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Brushes (AREA)
EP98956668A 1997-11-12 1998-11-06 Toothbrush Expired - Lifetime EP0955837B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02012748A EP1240847B1 (en) 1997-11-12 1998-11-06 Toothbrush
EP08022193A EP2052643A3 (en) 1997-11-12 1998-11-06 Toothbrush

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US96829397A 1997-11-12 1997-11-12
US968293 1997-11-12
US09/177,991 US6308367B1 (en) 1997-11-12 1998-10-23 Toothbrush
US177991 1998-10-23
PCT/US1998/023780 WO1999023910A1 (en) 1997-11-12 1998-11-06 Toothbrush

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP02012748A Division EP1240847B1 (en) 1997-11-12 1998-11-06 Toothbrush

Publications (4)

Publication Number Publication Date
EP0955837A1 EP0955837A1 (en) 1999-11-17
EP0955837A4 EP0955837A4 (en) 2000-07-19
EP0955837B1 EP0955837B1 (en) 2003-02-26
EP0955837B2 true EP0955837B2 (en) 2008-10-22

Family

ID=26873851

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02012748A Expired - Lifetime EP1240847B1 (en) 1997-11-12 1998-11-06 Toothbrush
EP98956668A Expired - Lifetime EP0955837B2 (en) 1997-11-12 1998-11-06 Toothbrush

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02012748A Expired - Lifetime EP1240847B1 (en) 1997-11-12 1998-11-06 Toothbrush

Country Status (24)

Country Link
EP (2) EP1240847B1 (no)
JP (4) JP4069188B2 (no)
CN (1) CN1120682C (no)
AR (1) AR048240A2 (no)
AT (1) ATE233060T1 (no)
AU (1) AU742959B2 (no)
BR (1) BR9806247A (no)
CA (1) CA2271852C (no)
CZ (1) CZ172999A3 (no)
DE (4) DE29823590U1 (no)
ES (1) ES2192797T5 (no)
GB (1) GB2333697A (no)
HU (1) HUP0004254A3 (no)
ID (1) ID21723A (no)
IL (1) IL129913A (no)
NO (1) NO992417L (no)
NZ (1) NZ335854A (no)
PL (1) PL191797B1 (no)
RO (1) RO120310B1 (no)
RU (1) RU2228129C2 (no)
SK (1) SK63899A3 (no)
TR (1) TR199901208T1 (no)
TW (1) TW538701U (no)
WO (1) WO1999023910A1 (no)

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CA2271852C (en) 2004-03-09
DE29823799U1 (de) 2000-08-24
EP1240847A3 (en) 2003-02-12
DE69811634T2 (de) 2003-10-23
EP0955837A1 (en) 1999-11-17
ID21723A (id) 1999-07-15
JP2008068108A (ja) 2008-03-27
DE29823590U1 (de) 1999-10-07
JP2008068109A (ja) 2008-03-27
JP4069188B2 (ja) 2008-04-02
CZ172999A3 (cs) 1999-12-15
CN1120682C (zh) 2003-09-10
ES2192797T5 (es) 2009-03-01
HUP0004254A3 (en) 2001-12-28
GB9911198D0 (en) 1999-07-14
AU742959B2 (en) 2002-01-17
NO992417L (no) 1999-07-16
CN1241123A (zh) 2000-01-12
ATE233060T1 (de) 2003-03-15
SK63899A3 (en) 2000-05-16
IL129913A (en) 2002-05-23
IL129913A0 (en) 2000-06-01
DE19881632T1 (de) 1999-10-28
NZ335854A (en) 2001-06-29
BR9806247A (pt) 2000-01-25
JP2008093449A (ja) 2008-04-24
EP0955837B1 (en) 2003-02-26
PL191797B1 (pl) 2006-07-31
WO1999023910A1 (en) 1999-05-20
EP1240847B1 (en) 2011-12-21
EP1240847A2 (en) 2002-09-18
NO992417D0 (no) 1999-05-20
RO120310B1 (ro) 2005-12-30
EP0955837A4 (en) 2000-07-19
TW538701U (en) 2003-06-21
DE69811634D1 (de) 2003-04-03
JP2001507981A (ja) 2001-06-19
GB2333697A (en) 1999-08-04
DE69811634T3 (de) 2009-05-14
ES2192797T3 (es) 2003-10-16
CA2271852A1 (en) 1999-05-20
AR048240A2 (es) 2006-04-12
HUP0004254A2 (en) 2001-03-28
TR199901208T1 (xx) 1999-12-21
AU1313799A (en) 1999-05-31
RU2228129C2 (ru) 2004-05-10

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