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Publication numberUS1466723 A
Publication typeGrant
Publication dateSep 4, 1923
Filing dateNov 12, 1921
Priority dateNov 12, 1921
Publication numberUS 1466723 A, US 1466723A, US-A-1466723, US1466723 A, US1466723A
InventorsRiichiro Izawa
Original AssigneeRiichiro Izawa
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Toothbrush
US 1466723 A
Images(1)
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Description  (OCR text may contain errors)

R. IZAWA Sept. 4, 1923.

TOOTHBRUSH Filed Nov. 12, 1921 Federated Sept. 41-, 1923.

NHTD

TES

RIICHIRO IZAVVA, OF SHIMOGYO-KU, KYOTO, JAPAN.

T all whom it may concern:

Be it known that I, RIIoHIRo IZAWA, a subject of the Emperor of Japan, residing at No. 7 Furunishi-machi, Nishikikojiagaru, Nishinotoin-dori, Shimogyo-ku, Kyoto, Japan, have invented new and useful Improvements in Toothbrushes, of which the following is a specification.

This invention relates to a tooth brush having a resilient stem bendable and elastic. The object of the invention is to provide a tooth brush which can bend freely and fit itself to a row of teeth of any configuration so as to keep its tuft of hairs constantly in close touch with the teeth surfaces by reason of its elasticity.

The accompanying drawings show the brush and the method of its manufacture, in which- Fig. 1 shows a side view of the brush,

Fig. 2 a plan View,

Fig. 3 an enlarged longitudinal section,

Fig. 4 an enlarged cross section,

Fig. 5 a longitudinal section of the manufacturing apparatus, and

Figure 6 is a cross section of the apparatus.

To enumerate the compositive parts in dctail, (1) a handle, (2) a tuft of hairs secured at the end of the handle or stem; the portion of the stem on which the hairs are fastened being composed of several small brush-holding members or pieces which pieces are arranged and fixed on a thin, narrow, elastic steel plate or strip (4) passing through the interior of the pieces like an axis.

To describe the method of manufacture, the small pieces are best made of celluloid or other similarly plastic materials. The plate (4:) has a number of small holes (6) therein through which a portion of the brush holding members pass, whereby the brush holding members are securely fastened to the plate.

The process of manufacture is illustrated in Fig. 5 and Fig. 6. (9) is an upper mold provided withconcavities (8), to mold the upper surfaces of the small pieces; (10) corresponding lower molds; (13) (1%) side molds, sliding smoothly over the lower mold and fitting each other when closed together to form concavities on the lower mold for the small pieces and to be removed when the molding has been completed; (4) a thin plate of steel or other elastic mates TOOTHBRUSH.

Serial No. 514,490.

rial; (11) (12) celluloid in tabular forms, to be used as material for the pieces and situated so as to secure the elastic plate (at) between the same.

Under such arrangement, if the molds are pressed against the material therein, while the same is being heated, the tabular celluloids become united enwrapping between them the elastic plate (4:) and are formed into separate pieces with a. connector each passing through the hole in the plate. The handle or stem of the brush above described is thus obtained; and the hairs are then put into place.

Thus the chief feature of the present invention consists in the fact that the part of the stem, on which the hairs are fastened is composed of several small pieces instead of a single piece as in ordinary brushes, and these pieces are connected together by means of a thin plate of steel or other elastic material. Owing to this construction, the toothbrush can bend freely during use, reacting meanwhile against the pressure, so that the brush is kept in close touch with, and strongly pressing against the teeth, whether applied to the front teeth, or to the molars.

I claim:

1. A tooth brush comprising a handle, a thin elastic plate fixed to said handle, said plate having a number of holes therein, aplurality of brush-holding members each having a portion surrounding said plate and each having a portion passing thru one of said holes, and tufts of hair anchored on said brush-holding members 2. A tooth brush comprising a handle, a curved spring steel plate fixed to said handle, said plate having a number of holes therein, a plurality of brush-holding members molded about said plate and each having a portion passing through one of said holes, and tufts of hair anchored on said brush-holding members.

3. A. tooth brush comprising a handle, a spring steel plate secured to said handle, said plate having a plurality of holes there in, a plurality of brush-holding members arranged end to end and surrounding said plate and being secured thereto, and hair anchored on said brush-holding members.

In testimony whereof I have signed my name to this specification.

RIICHIRO IZAWA,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2438268 *Jun 3, 1946Mar 23, 1948Louis R BresslerFlexible bristle head toothbrush
US2445657 *May 8, 1945Jul 20, 1948Paul G BennettToothbrush
US2606335 *Mar 25, 1946Aug 12, 1952Wiesman Frank DFlexible pushbroom
US2631320 *May 12, 1950Mar 17, 1953Bressler Louis RToothbrush
US2650383 *Mar 7, 1952Sep 1, 1953Bressler Louis RToothbrush with a flexible head
US2676350 *Mar 16, 1953Apr 27, 1954Stanley Home Products IncToothbrush with a flexible head
US2685703 *Apr 27, 1949Aug 10, 1954Edward F DellenbachToothbrush
US2722031 *Jun 21, 1952Nov 1, 1955Bressler Louis RBrush having relatively movable bristle carrying sections
US2730747 *Jun 21, 1952Jan 17, 1956Bressler Louis RBrush having relatively movable bristle carrying sections
US3493991 *Aug 24, 1967Feb 10, 1970Giovanni Sassoli De Bianchi SResilient tooth brush with adjustable pressure point
US4581193 *Apr 30, 1984Apr 8, 1986Milliken Research CorporationPreventing crushing of pile; passing between pin-like members
US4610619 *Sep 30, 1985Sep 9, 1986Milliken Research CorporationPile fabric molding apparatus
US5371915 *Apr 6, 1993Dec 13, 1994Key; John R.Angular headed toothbrush
US5758383 *Dec 10, 1996Jun 2, 1998Colgate-Palmolive CompanyContouring toothbrush head
US6073299 *Jul 12, 1999Jun 13, 2000Colgate-Palmolive CompanyContouring toothbrush head
US6178582Aug 22, 1996Jan 30, 2001Smithkline Beecham Consumer Healthcare GmbhToothbrush comprising a resilient flex region
US6314606Oct 22, 1999Nov 13, 2001Colgate-Palmolive CompanyContouring toothbrush head
US6327735Feb 17, 1998Dec 11, 2001Smithkline Beecham Consumer Healthcare, GmbhPower tip toothbrush with ball joint
US6357073 *Apr 10, 2000Mar 19, 2002Choy Heung YueToothbrush
US6442786Jan 25, 2001Sep 3, 2002Smithkline Beecham Consumer Healthcare GmbhToothbrush comprising a resilient flex region
US6442787Jul 3, 2001Sep 3, 2002Colgate-Palmolive CompanyContouring toothbrush head
US6675428Dec 15, 2000Jan 13, 2004Smithkline Beecham Consumer Healthcare GmbhToothbrush comprising a resilient flex region
US6996870Apr 1, 2002Feb 14, 2006Colgate-Palmolive CompanyContouring toothbrush head
US7356869Apr 15, 2005Apr 15, 2008S.C. Johnson & Son, Inc.Flexible cleaning tool with replaceable non-woven pad
US7707676Jun 30, 2006May 4, 2010The Procter & Gamble CompanyToothbrush
US7721376Dec 23, 2004May 25, 2010Colgate-Palmolive CompanyOral care implement
US7784141Sep 29, 2005Aug 31, 2010S. C. Johnson & Son, Inc.Flexible cleaning tool with replaceable non-woven pad and cleaning fluid reservoir
US7908699Dec 23, 2004Mar 22, 2011Colgate-Palmolive CompanyOral care implement
US8046865May 17, 2007Nov 1, 2011S.C. Johnson & Son, Inc.Cleaning tool with cleaning pad having a non-woven fiber bundle on both sides
US8060970Mar 11, 2010Nov 22, 2011The Procter & Gamble CompanyToothbrush
US8079110May 26, 2010Dec 20, 2011Colgate-Palmolive CompanyOral care implement
US8096306 *Jul 5, 2007Jan 17, 2012Albea ServicesMolded plastic mascara brush
US8281448Oct 3, 2007Oct 9, 2012Colgate-Palmolive CompanyOral care implement having one or more moving sections
US8332985Nov 18, 2011Dec 18, 2012The Procter & Gamble CompanyToothbrush
US8393042 *Oct 9, 2009Mar 12, 2013Colgate-Palmolive CompanyOral care implement
US8561247Jun 17, 2011Oct 22, 2013Colgate-Palmolive CompanyOral care implement
US8578544Jan 31, 2008Nov 12, 2013The Gillette CompanyOral hygiene implements having flexible elements, and methods of making the same
US8578546Oct 2, 2012Nov 12, 2013Colgate-Palmolive CompanyOral care implement having one or more moving pieces
US8584299Jul 25, 2007Nov 19, 2013The Procter & Gamble CompanyElectric toothbrushes
US20100024144 *Oct 9, 2009Feb 4, 2010Colgate-Palmolive CompanyOral Care Implement
USRE38521Jul 28, 1999May 25, 2004Lingner & Fischer GmbhToothbrush with resiliently flexible head
EP1868745A2 *Apr 13, 2006Dec 26, 2007S.C.JOHNSON & SON, INC.Flexible cleaning tool with replaceable non-woven pad and cleaning fluid reservoir
EP2430964A2 *Apr 13, 2006Mar 21, 2012S.C. Johnson & Son, Inc.Flexible cleaning tool with replaceable non-woven pad and cleaning fluid reservoir
WO1994022346A1 *Apr 5, 1994Oct 13, 1994John R KeyAngular headed toothbrush
WO1998005241A1Aug 1, 1997Feb 12, 1998David Victor CannA toothbrush
Classifications
U.S. Classification15/193, 264/243, 15/172, 15/167.1, 15/171
International ClassificationA46B7/00, A46B7/06
Cooperative ClassificationA46B7/06, A46B5/0025
European ClassificationA46B5/00B1, A46B7/06