US3384418A - Method and device for rounding brush bristles - Google Patents

Method and device for rounding brush bristles Download PDF

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Publication number
US3384418A
US3384418A US532670A US53267066A US3384418A US 3384418 A US3384418 A US 3384418A US 532670 A US532670 A US 532670A US 53267066 A US53267066 A US 53267066A US 3384418 A US3384418 A US 3384418A
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US
United States
Prior art keywords
disc
brush
bristles
axis
bristle ends
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
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US532670A
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English (en)
Inventor
Daniel A Guey
Maurice A M Briez
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.)
La Brosse et Dupont SA
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La Brosse et Dupont SA
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
Application filed by La Brosse et Dupont SA filed Critical La Brosse et Dupont SA
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Publication of US3384418A publication Critical patent/US3384418A/en
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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D9/00—Machines for finishing brushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D9/00—Machines for finishing brushes
    • A46D9/02—Cutting; Trimming

Definitions

  • the bristle ends are given a treatment preferably comprising the following successive stages: a roughing-out by machining on a rough surface whose extent in relation to the bristle ends varies constantly at the place where the bristles contact the rough surface; deburring by repeated impacts produced in all directions by rough-surfaced blunt elements moving rapidly in relation to the bristle ends; and a polishing or burnishing treatment, also performed by repeated impacts produced in all directions, this time by means of blunt elements which have polished surfaces and also move at a relatively high velocity in relation to the bristle ends.
  • the treatment according to the invention is performed after the bristles have been inserted in the brush, which is then placed in a brush-bearing member which enables the brush to rotate on itself to offer its bristle ends at all angles to the rough surface and impacting elements, the result being very regularly rounded bristle ends.
  • the rough surface is corrugated at the place where the bristle ends bear thereagainst, and during the roughing-out operation the bristle ends are moved transversely of the corrugations.
  • the rough surface can be a rotary disc formed with furrows which are eccentric of the axis of rotation and against which the bristle ends bear, the brush rotating around a fixed axis parallel with the axis of rotation of the disc.
  • the other operations can also be performed by means of rotary discs having impacting elements such as needles, which are advantageously disposed in concentric rows eccentric of the axis of rotation of the disc, the brush also being preferably so mounted as to rotate around an axis parallel with the axis of rotation of the disc.
  • the invention covers the method of treatment, the devices used for performing the treatment, the novel industrial products formed by bristles rounded by the application of the method according to the invention by means of at least one of its component devices, and
  • FIG. 1 is a plan view of a roughing-out disc according to the invention
  • FIG. 2 is a section, taken along the line IIII in FIG. 1, also showing diagrammatically the mounting of the brush whose bristles are tobe rounded,
  • FIG. 3 is a plan view of a disc for performing the deburring or polishing operations, in dependence on the kind of needles with which the disc is equipped,
  • FIG. 4 is a section, taken along the line IVIV in FIG. 3, also showing the mounting of the brush
  • FIG. 5 is a partial view, to an enlarged scale, of a disc having rough ended needles
  • FIG. 6 is a view similar to FIG. 5 of a disc having needles with smooth and polished ends.
  • the surface 5 forms part of one of the surfaces of a disc 7 rotated by a motor 8 around an axis B parallel with the axis A.
  • the corrugations 6 take the form of circular furrows with which the disc 7 is formed.
  • the furrows have a uniform width e and are centred on a point 0 (FIG. 1) which is at a distance d from the axis B slightly greater than half the width e.
  • the width e can have a value of approximately between 6 and 12 mm.
  • d can have a value of approximately between 4 and 8 mm.
  • the maximum depth of the furrows can be approximately 2-4 mm.
  • these values are merely exemplary.
  • the rough surface is preferably made of steel which has been hardened by tempering followed by hard chrome plating to produce a Vickers surface hardness of about 18002000.
  • the corrugated zone of the disc against which the bristles bear for rounding is roughened by sandblasting with sand having a grain size which can vary between 30 and 80, the grain size being defined by the number of wires per inch (25.4 mm.) of the smallest standard sieve through which the grain can pass.
  • the corrugated zone of the disc lies between two circumferences, whose radii are about 60-80 mm. and -150 mm.
  • the speed of rotation of the disc is in the order of 950-2800 rpm.
  • the brush can rotate on itself at a speed of 60-120 r.p.m. and be applied to the disc for a period during which the brush performs a certain number, for instance 28 revolutions.
  • the precise speeds to be used can be determined by tests made in each particular instance.
  • the brush can be given a deburring treatment by repeated impacts produced in all directions by impacting elements moving at relatively high velocities.
  • the impacting elements are needles having rounded ends and inserted in a rotary disc 10 driven by a motor 11 (FIG. 4).
  • the needles 12 are disposed in concentric and eccentric semicircles Whose centres D and D are symmetrical of the centre 0 of the disc 10 (FIG. 3). For instance, the
  • semicircles are at a distance of about 5 mm. from one another, the radii for the smaller circles varying from about 60-80 mm. and for the larger semicircles from about 110-130 mm.
  • the eccentricity can be, for instance, 4-8 mm.
  • the dimeter of the needles can vary from about 1-5 mm.
  • the ends 13 of the needles 12 are roughened by sandblasting performed, as in the case of the disc 7, with sand whose grain size varies from about 30-80.
  • the brush l to be treated is mounted in a brush-bearing member 14 disposed in front of the ring of needles and rotated by a motor 15 around an axis E parallel with the axis F of the disc 10.
  • the disc can be driven at speeds of between about 1400 and 3500 rpm. and the brush-bearing member can rotate at about 60-120 -r.p.m., the brush performing 4-12 revolutions in contact with the disc.
  • the needles l2 deburr the rounded bristle ends roughed out by the disc 7.
  • the third operation namely the final polishing or burnishing, is performed with a disc and brush-bearing member which are identical with those described hereinbefore, except that the ends 13a of the needles 12 are completely smooth (FIG. 6).
  • the size and arrangement of the needles, and also the speeds of rotation of the disc and the brush-bearing member can be the same as in the deburring operation.
  • a method of rounding brush bristles wherein the bristle ends are first given a roughing-out treatment by machining on a surface whose extent relatively to the bristle ends varies constantly at the place where the bristles contact the surface, whereafter the roughed-out bristle ends are given a polishing treatment by repeated impacts produced in all directions by blunt elements moving at a relatively high velocity in relation to the roughed-out bristle ends.
  • deburring is performed by repeated impacts produced in all directions on the roughed-out bristle ends by blunt rough-surfaced elements moving at a relatively high velocity in relation to the roughed-out bristle ends, the polishing whereof is performed by blunt elements having polished surfaces.
  • a device for roughing-out the rounding of brush bristles comprising a corrugated rough surface, means for traversing the corrugated rough surface in front of a rotary brush-bearing member and in contact with the ends of the bristles of a brush mounted therein, and means for making the corrugations perform a transverse oscillatory movement in relation to the bristles.

Landscapes

  • Brushes (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US532670A 1965-03-15 1966-03-08 Method and device for rounding brush bristles Expired - Lifetime US3384418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9308A FR1436706A (fr) 1965-03-15 1965-03-15 Procédé et appareillage pour l'arrondissage des soies de brosses

Publications (1)

Publication Number Publication Date
US3384418A true US3384418A (en) 1968-05-21

Family

ID=8573992

Family Applications (1)

Application Number Title Priority Date Filing Date
US532670A Expired - Lifetime US3384418A (en) 1965-03-15 1966-03-08 Method and device for rounding brush bristles

Country Status (7)

Country Link
US (1) US3384418A (US06623731-20030923-C00052.png)
BE (1) BE677805A (US06623731-20030923-C00052.png)
DE (1) DE1299277B (US06623731-20030923-C00052.png)
FR (1) FR1436706A (US06623731-20030923-C00052.png)
GB (1) GB1137531A (US06623731-20030923-C00052.png)
LU (1) LU50428A1 (US06623731-20030923-C00052.png)
NL (1) NL6602945A (US06623731-20030923-C00052.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001091608A3 (en) * 2000-05-26 2002-05-30 Moll Ind Inc Method and apparatus for end-rounding bristles
US6464301B1 (en) * 1998-10-14 2002-10-15 M & C Schiffer Gmbh Device and method for processing bristle filaments of brushes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2922289A1 (de) * 1979-05-31 1980-12-04 Boucherie Nv G B Vorrichtung zum abrunden der enden von buerstenborsten
FR2495909A1 (fr) * 1980-12-11 1982-06-18 Fabre Sa Pierre Procede de traitement de l'extremite des fibres naturelles pour brosse a dents
DE19500145C2 (de) * 1995-01-04 1999-09-23 Coronet Werke Gmbh Vorrichtung zum Runden der Enden von Kunststoffborsten
CN1101167C (zh) * 1996-07-05 2003-02-12 安东沙郎斯基有限公司及两合公司 磨削装置
DE19644025A1 (de) * 1996-10-31 1998-05-07 Zahoransky Anton Gmbh & Co Verfahren und Vorrichtung zum Bearbeiten von Borsten

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1627704A (en) * 1925-02-02 1927-05-10 Izawa Riichiro Bristle-pointing device
US2017487A (en) * 1935-05-28 1935-10-15 Prophylactic Brush Co Grinding wheel for bristles
US2227126A (en) * 1934-03-02 1940-12-31 Cooke Hereward Lester Brush and manufacture thereof
CA507794A (en) * 1954-11-30 La Brosse And J. Dupont Reunis (Societe Anonyme) Method and means for rounding off and polishing the ends of thermoplastic brush bristles

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE494077A (US06623731-20030923-C00052.png) *
GB259076A (en) * 1926-01-02 1926-10-07 Riichiro Izawa A brush of artificially pointed bristles and an apparatus for pointing these bristles
DE810867C (de) * 1950-01-11 1951-08-13 Brosse & J Dupont Reunis Verfahren und Vorrichtung zum Abrunden und Polieren der Enden von Buerstenborsten
CH297349A (fr) * 1950-02-27 1954-03-31 Sylvain Dr Dreyfus Procédé pour émousser les bouts des brins garnissant des brosses, installation pour la mise en oeuvre de ce procédé et brosse obtenue par ce procédé.
DE940647C (de) * 1952-07-12 1956-03-22 Hoechst Ag Verfahren zum Abrunden der Schnittenden von Kunststoffborsten
DE958016C (de) * 1953-03-12 1957-02-14 Dr Sylvain Dreyfus Vorrichtung zum Abstumpfen und Abrunden der Borstenspitzen von Buersten
US3063204A (en) * 1959-08-18 1962-11-13 John G Baumgartner Bristle grinding
DE1879941U (de) * 1962-08-04 1963-10-03 Blendax Werke Schneider Co Vorrichtung zum abrunden von borstenspitzen, insbesondere bei zahnbuersten mit kunststoffborsten.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA507794A (en) * 1954-11-30 La Brosse And J. Dupont Reunis (Societe Anonyme) Method and means for rounding off and polishing the ends of thermoplastic brush bristles
US1627704A (en) * 1925-02-02 1927-05-10 Izawa Riichiro Bristle-pointing device
US2227126A (en) * 1934-03-02 1940-12-31 Cooke Hereward Lester Brush and manufacture thereof
US2017487A (en) * 1935-05-28 1935-10-15 Prophylactic Brush Co Grinding wheel for bristles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6464301B1 (en) * 1998-10-14 2002-10-15 M & C Schiffer Gmbh Device and method for processing bristle filaments of brushes
WO2001091608A3 (en) * 2000-05-26 2002-05-30 Moll Ind Inc Method and apparatus for end-rounding bristles

Also Published As

Publication number Publication date
LU50428A1 (US06623731-20030923-C00052.png) 1966-08-10
NL6602945A (US06623731-20030923-C00052.png) 1966-09-16
GB1137531A (en) 1968-12-27
BE677805A (US06623731-20030923-C00052.png) 1966-09-14
DE1299277B (de) 1969-07-17
FR1436706A (fr) 1966-04-29

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