Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3302230 A
Publication typeGrant
Publication dateFeb 7, 1967
Filing dateOct 20, 1965
Priority dateOct 30, 1964
Also published asDE1532799A1, DE1532799B2
Publication numberUS 3302230 A, US 3302230A, US-A-3302230, US3302230 A, US3302230A
InventorsPoppelmann Ake
Original AssigneePoppelmann Ake
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Toothbrush
US 3302230 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

Fb. 7, 1967 AKE POPPELMAN 3,302,230

TOOTHBRUSH Filed Oct. 20, 1965 FIGA FIGB FIGS KE ,DOPPEL MAN A 7' TOP/VE Y United States Patent O 3,302,230 TOOTHBRUSH ke Poppelmann, Brahegatan 4, Stockholm, Sweden Filed Oct. 20, 1965, Ser. No. 498,504 Claims priority, application Sweden, Oct. 30, 1964, 13,124/ 64 2 Claims. (Cl. 15-167) The present invention relates to a toothbrush made f a thermoplastic material, such as polyethylene or polypropylene and comprising a handle and bristles produced in one unit.

It is known that present day toothbrushes of the usual types to be found in shops, are almost with-out exception furnished with bristles of nylon and similar plastics. The material for bristles of such toothbrushes, is usually made of extruded nylon or some plastic which has similar physical qualities, and which material, at the production of the toothbrushes is cut into bristles of suitable length. In later years, however, one has noticed more and more, vthat bristles obtained by this method show great disadvantages on usage i,e. partly because such bristles have a detrimental effect or a tearing effect on the tissue of the gums, and partly because the pastic material employed, by virtue of its hardness, causes a heavy wearing or grinding effectespeciallyat the necks of the teeth, where the teeth are not coated with hard enamel. This disadvantageous grinding down of the surface material of the teeth and the detrimental effect on the tissue of the gums, has been established by a series of investigations.

Toothbrushes of polyethylene are also .kno-wn, but the bristles of these must be made coarser than the bristles of conventional toothbrushes, 'because of technical reasons.

This has been considered to'signify a disadvantage, inasmuch as these coarse lbristles cannot clean effectively in small cavities or between teeth that are situated very closely to each other.

Therefore, for a great length of time a noticeable need has been present, in the eld of odontology, for a toothbrush that is produced with a bristle material that has none of the said disadvantages.

These disadvantages can be eliminated by the toothbrush according to this invention, which because of its economical cost is, in addition, Very suitable for disposable use e.g. in medical and dental services or at restaurants or hotels and when travelling.

The characterising features of the toothbrush according to the invention, is that its bristles taper or narrow toward the apices, preferably from the base to the apex, and have a cross-section in the shape of a polygon with at least two acute angles, and that the bristles have a coating of dentifrice. The cross-section of the bristles can be, therefore, triangular, rhomb-ic, star shaped or form an irregular polygon, due to this shape of bristle a scraping effect is obtained, which is never achieved by a bristle of for instance circular cross-section, from which only a brushing effect is obtained. By the fact that the bristles narrow toward the apices, they are able to penetrate into the interdental spaces, which is not possible with the usage of the thick bristle hitherto existent e.g. of polyethylene.

Due to the special cross-section of the bristles, a better retention of the tooth cleaning medium is achieved than when bristles of circular cross-section are used.

Because of the relative softness of the 'bristles the toothbrush according to the invention is espe-cially suitable for massage of the gums. It has proved especially suitable to use a thermoplastic material having a Shore ICC C hardness of to 94, preferably 85 to 87, determined according to DIN 53505.

The bristles can, to great advantage, on a toothbrush according to this inventi-om be produced of a thermoplastic material that is relatively soft, such as polyethylene of a density to within the range 0.917 to 0.940, especially 0930-0935, where the density is expressed in g./cm.3 and defined according to DIN 5 3749. The melting index of the polyethylene shall according to the invention, preferably lie within the range 1.5 to 1.7, especially 3.0 to 5 eg. approximately 4, where the melting temperature range is expressed in g./l0 min. and delined according to ASTM D 1238-57T.

The bristles can be given a relatively large cross-secti-onal area, which, however, as before mentioned, should decrease towards the apices, -by which the bristles obtain the required mechanical qualities such as stiffness and ileximility.

It has been proved, that one obtains the best results when brushing the teeth, by the usage of bristles whose cross-section is comprised of a polygon with at least two acute angles and a cross-sectional area at the base of every bristle which lies within the range of from 0.10 to 0.30 mm?, preferably about 0.20 mm.2. Thereby the longitudinal edges have a scraping eiect on the coating on the teeth, which is eflicaceously removed. It has proved to be especially suitable to provide the bristles in transverse rows with different lengths, whereby the least detrimental and the most effective cleaning of the teeth is achieved.

The toothbrush will be more clearly described, with reference to the annexed drawing in which: FIG. 1 shows a sectional elevation of a suitable embodiment of a toothbrush, which has been produced by injection moulding; FIG. 2 shows the bristles in a plan elevation; FIG. 3 shows the bristles in an end elevation along the lines 3 3 of FIG. 1, and FIGS. 4, 5 and 6 show, on a larger scale, a cross-section of a bristle.

In the embodiment shown in the drawing the toothbrush is provided lwith a handle 1, which has longitudinal and transverse strengthening ribs 2. The head of the toothbrush is indicated by 3 and its bristles by 4. In this embodiment, the bristles 4 have a trianglar cross-section as is apparent from FIG. 2 and on a larger scale in FIG. 4.

Preferably, the bristles have such a cross-section as is .shown in FIGS. 5 and 6. In FIG. 5 the cross-section is rhombic and in FIG. 6 star shaped.

The toothbrush is provided with a coating of tooth dentifrice, e.g. in the form of a layer on the bristles or in some other way by which the supply of special toothpaste becomes abundant when brushing the teeth.

The dentifrice can be comprised of a paste which slowly dissolves on contact with moisture, and preferably be situated between the separate bristles and most preferably in proximity to their union with the handle. This paste contains active detergents of the usual, existing types, e.g. sodium lauryl sulphate or sodium dodecyl benzene sulphonate, taste and smell substances and possibly other additive mediums usual to dental care preparations, such as mild grinding media or polishing media, tooth enamel strengthening additives and substances containing uorides, etc., and as binding agent, a gelating substance that is slowly dissolved by moisture, such as vegetable gums, alginates or cellulose derivatives, e.g. carboxymethylcellulose. Thereby, a disposable toothbrush can be used several times, e.g. 3 to 10 times, without additional dentifrice being necessary. On renewed use a new quantity of dentifrice is dissolved by the moisture supplied.

The dentifrice may be coloured in order to make it easier to observe when it has been consumed.

With such usage the coating of dentifrice is preferably provided with bactericides or fungicides of conventional type. By the addition of saliva secreting agents, eg. in the form of an acid or an acidic salt, preferably vitamin C, the addition of water, when brushing the teeth, becomes unnecessary.

An example of a dentifrice in the form of a solution to be applied to the bristles and thereafter be allowed to dry is the following:

Sodium saccharine; saliva secreting agents, such as ascorbic acid, citric acid and monosodiumphosphate; ethyl alkohol; active detergents, such as sodium laurylsulphate; aromatic substances, such as Gargarisma aromatica conc. (containing i.a. peppermint oil and menthol); gelating substances, such as sodiumalgenate; grinding agents and distilled water.

The sodium saccharine and the saliva secreting agents can each be included in a quantity of about 20 percent by Weight, the active detergent can be added in a quantity of about percent by weight, and the distilled water is added up to 100 percent by weight.

What I claim is:

1. A toothbrush of thermoplastic material comprising a back having bristles in which the bristles taper toward the apices and have a cross section in the shape of a polygon with at least two acute angles and in which the bristles are provided with a coating of a dentifrice, each of said bristles tapering from the base to the apex, and the cross section at the base is approximately 0.2 mm2, each said bristle having a Shore C hardness of 85 to 87 and a density of 0.930-0935 where density is expressed in g./cm.3, and having a dentifrice containing a slowly dissolving gelatinous substance which dissolves upon contact with water, said dentifrice further containing a saliva secreting agent.

2. A toothbrush as claimed in claim 1 in which the coating of dentifrice contains as the saliva secreting agent, a compound selected from the group consisting of ascorbic acid, citric acid and monosodiumphosphate.

References Cited by the Examiner UNITED STATES PATENTS 1,773,969 8/1930 Dreyfus et al. 18-159.1 2,225,331 12/1940 Campbell 15--188 2,317,485 4/1943 Rider l5-159.1 X 2,845,649 8/1958 Hutson 15-167 2,876,477 3/1959 Stewart 15-1591 2,915,767 12/1959 Vaughan 15-167 3,103,935 9/1963 Woodrow 15k187 X 3,105,260 10/1963 Smith et al. 15-187 X 3,125,776 3/1964 Lilley 15-159.1

FOREIGN PATENTS 549,168 11/1957 Canada.

571,724 3/1933 Germany.

203,802 6/ 1939 Switzerland.

CHARLES A. WILLMUTH, Primary Examiner.

P. F ELDMAN, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1773969 *Sep 8, 1928Aug 26, 1930Celanese CorpProcess of and apparatus for making artificial filaments
US2225331 *Oct 18, 1938Dec 17, 1940Pauline CampbellRubber bristled toothbursh
US2317485 *Apr 27, 1940Apr 27, 1943Pepsodent CoBrush
US2845649 *Aug 23, 1955Aug 5, 1958Robert W HutsonBrush
US2876477 *Dec 8, 1955Mar 10, 1959George G StewartBrush
US2915767 *Apr 24, 1958Dec 8, 1959Vaughan Frank CDisposable toothbrushes
US3103935 *Jul 13, 1960Sep 17, 1963Louis J WoodrowDisposable toothbrush
US3105260 *Jan 23, 1961Oct 1, 1963Allen SmithOne-piece disposable toothbrush
US3125776 *Dec 7, 1960Mar 24, 1964 Moulded quills
CA549168A *Nov 26, 1957John F BergmannTooth brush with dentifrice coated bristles
CH203802A * Title not available
DE571724C *Mar 4, 1933Eduard AlfkenZahnbuerste
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3378870 *Mar 22, 1967Apr 23, 1968Matsunaga KenjiToothbrush
US3589823 *Sep 2, 1969Jun 29, 1971Hendrickson Orrin WDisposable toothbrush
US4565205 *Mar 18, 1983Jan 21, 1986Super Brush Co., Inc.Molded mascara applicator
US5339482 *Jul 21, 1992Aug 23, 1994Johnson & Johnson Consumer Products, Inc.Toothbrush having non-slip surface
US5522174 *Nov 21, 1994Jun 4, 1996Wagner; Vida A.Sanitary bug catcher
US5605756 *Mar 23, 1995Feb 25, 1997Gmz Holding CompanyGrafting monomers to bristles
US5783249 *Nov 1, 1996Jul 21, 1998Gmz Holding CompanyDisposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
US5806127 *Jun 10, 1996Sep 15, 1998Colgate-Palmolive CompanyCoded toothbrush
US5888578 *Jun 12, 1998Mar 30, 1999Gmz Holding CompanyUsing free radical catalyst
US5908038 *Feb 5, 1998Jun 1, 1999Chesebrough-Pond's Usa Co.Unitarily molded toothbrush
US5926900 *Feb 5, 1998Jul 27, 1999Chesebrough-Pond's Usa Co.Unitarily molded toothbrush
US5987688 *Oct 29, 1996Nov 23, 1999Gillette Canada Inc.Gum-massaging oral brush
US6033733 *Apr 5, 1995Mar 7, 2000Colgate-Palmolive CompanyMethod for controlling dentifrice usage
US6086373 *Nov 10, 1998Jul 11, 2000Schiff; ThomasMethod of cleaning teeth with a toothbrush with improved cleaning and abrasion efficiency
US6138314 *Jul 24, 1997Oct 31, 2000Whitehill Oral Technologies, Inc.Toothbrush with improved cleaning and abrasion efficiency
US6138315 *Jan 13, 1998Oct 31, 2000Chesebrough-Pond's Usa Co., Divison Of Conopco, Inc.Antimicrobial active compounds
US6151745 *Jul 12, 1999Nov 28, 2000Gillette Canada, Inc.Gum-massaging oral brush
US6295733Aug 3, 1994Oct 2, 2001Warner-Lambert CompanyChangeable color shaving aid
US6895624Mar 7, 2002May 24, 2005Ultradent Products, Inc.Powered tongue cleaning device
US7895695 *Apr 24, 2002Mar 1, 2011S K G Italia S.P.A.Tooth-cleaning device
US7958589Jun 12, 2009Jun 14, 2011The Gillette CompanyToothbrushes
US7975344Jul 6, 2007Jul 12, 2011The Gillette CompanyToothbrush head
US7975389 *Feb 3, 2005Jul 12, 2011Bic-Violex SaRazor handle having ergonomic gripping areas
US8042217Nov 2, 2004Oct 25, 2011Colgate-Palmolive CompanyToothbrush and method of making the same
US8075216Jan 25, 2007Dec 13, 2011Colgate-Palmolive CompanyOral care implement housing an oral care agent
US8156600Sep 9, 2008Apr 17, 2012The Gillette CompanyGum massaging oral brush
US8332982Aug 24, 2009Dec 18, 2012The Gillette CompanyVibrating toothbrush
US8453288Jun 15, 2007Jun 4, 2013Braun GmbhToothbrush, toothbrush head and tooth cleaning bristle
US8528148Jun 7, 2011Sep 10, 2013The Gillette CompanyToothbrush head
US8534949Jul 30, 2010Sep 17, 2013MYCONE Dental Supply, Co., Inc.Toothbrush with reactive composition for remineralization of teeth
US8621698Apr 6, 2011Jan 7, 2014Braun GmbhToothbrushes
US8677541Sep 25, 2012Mar 25, 2014Braun GmbhOral care products and methods of using and marking the same
US20120324664 *Jun 24, 2011Dec 27, 2012Don Allen CarpenterFlexible toothbrush with rigid handle support
USRE44819Apr 8, 2004Apr 1, 2014Procter & Gamble Business Services Canada CompanyToothbrush
EP0955836A1 *Jul 24, 1997Nov 17, 1999Thomas SchiffToothbrush with improved cleaning and abrasion efficiency
WO1994009677A1 *Oct 29, 1993May 11, 1994William A BredallToothbrush
WO1995013412A1 *Nov 10, 1994May 18, 1995Gmz Holding CoDisposable toothbrush having mint flavored toothpaste composition bonded to bristles thereof
WO1995017116A1 *Dec 16, 1994Jun 29, 1995Benlidi Holdings Pty LtdToothbrushes, particularly for one-time use
WO1998004167A1 *Jul 24, 1997Feb 5, 1998Thomas SchiffToothbrush with improved cleaning and abrasion efficiency
WO1998057569A1Jun 15, 1998Dec 23, 1998Unilever NvUnitarily molded toothbrush
WO1998057570A1Jun 15, 1998Dec 23, 1998Unilever NvUnitarily molded toothbrush
WO2007092823A2 *Feb 6, 2007Aug 16, 2007Dale G BrownSialagogue coatings for interproximal devices
WO2012015422A1 *Jul 30, 2010Feb 2, 2012Mycone Dental Supply Company, Inc.Toothbrush with reactive composition for remineralization of teeth
Classifications
U.S. Classification15/167.1, 15/187, 424/401, 424/52, 15/104.94, 424/57, 424/55
International ClassificationA46B1/00, A46B9/04
Cooperative ClassificationA46B9/04, A46B1/00
European ClassificationA46B9/04, A46B1/00