US3292199A - Plastic paint brush improvements - Google Patents

Plastic paint brush improvements Download PDF

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Publication number
US3292199A
US3292199A US475132A US47513265A US3292199A US 3292199 A US3292199 A US 3292199A US 475132 A US475132 A US 475132A US 47513265 A US47513265 A US 47513265A US 3292199 A US3292199 A US 3292199A
Authority
US
United States
Prior art keywords
sleeve
ferrule
handle
extending longitudinally
adhesive mass
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
US475132A
Other languages
English (en)
Inventor
Laurizio Jeremiah
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.)
American Flange and Manufacturing Co Inc
Original Assignee
American Flange and Manufacturing Co 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
Application filed by American Flange and Manufacturing Co Inc filed Critical American Flange and Manufacturing Co Inc
Priority to US475132A priority Critical patent/US3292199A/en
Priority to DE1966A0052963 priority patent/DE1532780B2/de
Priority to NL6609933A priority patent/NL6609933A/xx
Priority to ES1966130161U priority patent/ES130161Y/es
Application granted granted Critical
Publication of US3292199A publication Critical patent/US3292199A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/04—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by mouldable materials, e.g. metals, cellulose derivatives, plastics
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/08—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by clamping
    • A46B3/10—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by clamping into rings or the like
    • A46B3/12—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by clamping into rings or the like specially adapted for paint-brushes

Definitions

  • Brushes made all of plastic particularly in the larger sizes ranging up from the four inch size need to be strong and rigid in construction and assembly to withstand the weakening effects of normal use, not to mention the abuse resulting from the common impact method of brush cleaning.
  • One problem to overcome is the tendency of the longer side walls to work laterally away from the bristle knot. This tendency increases as the width of the ferrule increases. It occurs not only during the normal usage of the finished brush but also in the normal handling of bristle trimming and finishing operations employed in the course of completing the brush.
  • the invention construction overcomes this tendency by the provision of novel interlock means integrally formed on the interior surface of the ferrule side walls for interlocking engagement with the mass of adhesive employed for securing the elements of the brush together.
  • the interlock formation provided between the handle and securing adhesive of the invention brush eliminates the above mentioned and other prior art deficiencies and substantially improves upon existing constructions. It does so by providing a series of locking surfaces, which, even if only partially embedded within the plastic mass, form permanent rigid interlocks with the adhesive and hence also with the bristle knot. This interlock firmly anchors the handle with respect to the adhesive mass not only against forces exerted in a longitudinal direction but also against laterally directed forces which tend to loosen the handle and work or expand the handle laterally away from the bristle knot.
  • a simple easily manufactured brush construction is disclosed wherein longitudinal and lateral movement of both the ferrule and the handle relative to the bristle knot is prevented.
  • Another objects is to provide a plastic paint brush construction having improved interlocking means between the ferrule and bristle knot.
  • Another object is to provide a plastic paint brush construction having improved interlocking the bristle knot and handle.
  • a further object is to provide improved plastic handles for paint brushes.
  • a still further object is to provide improved plastic ferrules for paint brushes.
  • a more detailed object is to provide a plastic paint brush construction having an interlocking connection between the handle, ferrule and bristle knot so as to effectively prevent both longitudinal and lateral relative movement of the respective parts.
  • FIG. 1 is a part sectional part elevational view of the paint brush in accordance with the invention.
  • FIG. 2 is a perspective exploded view showing the handle and ferrule
  • FIG. 3 is a cross-sectional view taken on line 33 of FIG. 1 and looking in the direction of the arrows;
  • FIG. 4 is a cross-sectional view taken on line 4-4 of FIG. 1 and looking in the direction of the arrows;
  • FIG. 5 is a cross-sectional view of a modified form of ferrule.
  • the complete brush assembly as shown in FIG. 1 has as its principal parts a handle 1, a ferrule 2, and bristles 3.
  • the handle 1 is formed of a synthetic plastic material and comprises an elongated hollow hand grip 4 flaring outwardly at one end into a curved base 5, which in turn has extending longitudinally outwardly therefrom a rectangular sleeve 6 having opposed side walls 7 and opposed end walls 8.
  • a pair of lateral integral cross-members 9 and 10 extend outwardly from the base 5 and interconnect opposing side walls 7.
  • the base of the sleeve 6 is surrounded by a longitudinally outwardly opening channel 11 having a bottom 12 formed as an extension of the base 5 and an outer wall formed by the peripheral lip 13.
  • a pair of reinforcing webs 15 and 16 are formed in the throat of the handle between the cross members 9 and 10. These webs extend outwardly parallel to the side walls 7 of the sleeve 6 and are spaced therefrom as clearly seen in FIG. 3. It has been found that presence of webs 15 and 16 prevents any appreciable defiection of the base 5 which deflection otherwise has a tendency to occur as a result of the shrinkage stresses set up in the part during the moldmeans between ing and subsequent curing thereof.
  • a plurality of spaced holes 17 are provided extending laterally through the side walls 7 of the sleeve 6 adjacent the outer free edge thereof.
  • the holes 17 comprise cylindrical passageways having countersunk portions 18 at their outer ends.
  • the number and the spacing of the holes 17 may be varied as desired but what is important is that the diameter of at least some of the holes 17 be greater at the exterior surface. This prevents the adhesive resin from pulling back out once it flows into the holes, fills them and sets there.
  • the ferrule 2 also molded of synthetic plastic material, is a hollow member having a generally reteangular crosssectional configuration corresponding to the cross-sectional configuration of the handle sleeve 6 and having side walls 20 and end walls 21.
  • the upper portion 2a of the interior surface of the ferrule is so dimensioned as to tightly surround the outer surface of the sleeve 6 without any more clearance therebetween than is necessary for fitting the parts together,
  • the ferrule 2 is substantially longer than the sleeve 6 and terminates at its outer or bristle end in a cross-sectionally inwardly thickened lip 22 having an elongated interior surface 23 and an inner edge 24.
  • a pair of short ribs 25 having their sides under cut in dovetail formation are positioned centrally on the interior surface of each ferrule side wall 20 and extend inwardly from the inner lip edge 24.
  • a pair of ribs 26 is also formed on the interior surface. of each ferrule side wall in spaced relationship with respect to the lip 22. In FIG. 2 the ribs 26 can be seen protruding from the interior surface of the side walls 20, one on either side of the centrally positioned dovetail shaped ribs 25.
  • the upper portion of the bristles 3 is embedded in suitable resin such as epoxy, to form the bristle knot 19. This knot also secures the spacer strips 27 in place at the upper end of the bristles.
  • the assembling of the various components into a finished brush construction is carried out by first inserting the bristle knot 19, carrying the spacer strips 27 as shown in FIG. 3, into the ferrule 2 so that the upper ends 28 of the bristles are positioned in alignment with the edge 24 of the lip 22.
  • a quantity of adhesive in liquid form a non-limiting example of which is an epoxy resin, is then injected into the open end of the ferrule on top of the bristle ends 28.
  • the sleeve 6 of the handle 1 is then inserted in the ferrule and the respective parts moved together longitudinally.
  • the liquid adhesive flows through the holes 17 so that upon subsequent curing of the adhesive into a hardened mass 30, laterally extending portions thereof, indicated by numeral 31, protrude through the holes 17 so as to firmly anchor the handle within the adhesive mass.
  • laterally extending portions are quite effective to prevent longitudinal separation of the handle and bristle knot under ordinary conditions, it has been found that in actual practice the severe abuse to which paint brushes are frequently subjected, may cause a straight cylindrical portion of hardened adhesive mass to work loose and eventually pull out of a straight cylindrical hole.
  • the invention provides countersunk enlargements 18 at the outer ends of the holes 17 in the side walls 7 so that the laterally extending portions 31 of the hardened adhesive mass flare outwardly as shown at 32. Withdrawal of the laterally extending portions 31 from the holes 17 is thus prevented since neither the dimensional changes caused by the swelling action of commonly used commercial solvents nor the severest mechanical action imposed by extended hard use, will cause the enlarged adhesive mass portions 32 to be worked out of the holes 17.
  • the interlocking portion of the ferrule has been particularly susceptible to the swelling effects of the commercial solvents to which paint brushes are commonly subjected.
  • the resulting reaction of the plastic ferrule submerged in such solvents is to swell thus growing in internal dimension so as to pull laterally away from the sides of the adhesive mass 30.
  • the problem is to secure the ferrule to the handle and to the bristle knot in such manner as to preclude both lateral and longitudinal movement of the ferrule with respect to the handle sleeve and maintain it secured regardless of swelling.
  • a modified ferrule 40 is shown in FIG. 5 which is similar in all respects to the ferrule 2 of the preferred.
  • a handle member molded of synthetic plastic material having an elongated hand grip portion terminating in a peripheral laterally outwardly flaring base, a hollow sleeve extending longitudinally outwardly from said base and terminating in an outer free end portion, bristles adhesively bound together adjacent one end in an adhesive mass and extending longitudinally outwardly of said sleeve, a plurality of holes extending laterally through said sleeve end portion for effecting interlocking engagement between said sleeve and said adhesive mass, said holes forming a larger opening at the exterior surface of said sleeve than at the interior surface, and a tubular ferrule tightly engaged about said sleeve in surface contact with said end portion and extending longitudinally outwardly thereof so as to encircle said hound end of said bristles.
  • said holes having a countersunk portion at their juncture with the exterior surface of said sleeve and said adhesive mass forming an interlocking engagement with said holes and said countersunk portions.
  • a handle member molded of synthetic plastic material having an elongated hand grip portion terminating in a peripheral laterally outwardly flaring base, a hollow sleeve extending longitudinally outwardly from said base and terminating in an outer free end portion, bristles adhesively bound together adjacent one end in an adhesive mass and extending longitudinally outwardly of said sleeve, a plurality of lateral surface forming means spaced about said free end portion for effecting interlocking engagement between said sleeve and said adhesive mass, a portion of said adhesive mass interposed between the end of said bristles and said surface forming means and extending laterally outwardly of said bristles adjacent said bound end, a tubular ferrule engaged about said sleeve and extending longitudinally outwardly thereof so as to encircle said bound end of said bristles, the outer end of said ferrule terminating in a laterally inwardly entending lip having an interior surface bearing against the adhesively bound end portion of said bristles and
  • said adhesive interlocking means forming a dovetail configuration.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Brushes (AREA)
US475132A 1965-07-27 1965-07-27 Plastic paint brush improvements Expired - Lifetime US3292199A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US475132A US3292199A (en) 1965-07-27 1965-07-27 Plastic paint brush improvements
DE1966A0052963 DE1532780B2 (de) 1965-07-27 1966-07-08 Malerpinsel
NL6609933A NL6609933A (forum.php) 1965-07-27 1966-07-14
ES1966130161U ES130161Y (es) 1965-07-27 1966-07-26 Brocha perfeccionada.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US475132A US3292199A (en) 1965-07-27 1965-07-27 Plastic paint brush improvements

Publications (1)

Publication Number Publication Date
US3292199A true US3292199A (en) 1966-12-20

Family

ID=23886319

Family Applications (1)

Application Number Title Priority Date Filing Date
US475132A Expired - Lifetime US3292199A (en) 1965-07-27 1965-07-27 Plastic paint brush improvements

Country Status (4)

Country Link
US (1) US3292199A (forum.php)
DE (1) DE1532780B2 (forum.php)
ES (1) ES130161Y (forum.php)
NL (1) NL6609933A (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10869544B2 (en) 2018-11-05 2020-12-22 The Sherwin-Williams Company Brush handle assembly and method for making

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432009A (en) * 1917-03-10 1922-10-17 Said Angier Wrapping machine
US1915057A (en) * 1930-12-20 1933-06-20 Don J Foss Brush ferrule
US2274002A (en) * 1940-03-21 1942-02-24 Rubberset Company Paint brush
US3155998A (en) * 1960-02-02 1964-11-10 H V Hardman Company Inc Brush structure
US3172141A (en) * 1960-03-28 1965-03-09 Baker Brush Co Inc Brush construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432009A (en) * 1917-03-10 1922-10-17 Said Angier Wrapping machine
US1915057A (en) * 1930-12-20 1933-06-20 Don J Foss Brush ferrule
US2274002A (en) * 1940-03-21 1942-02-24 Rubberset Company Paint brush
US3155998A (en) * 1960-02-02 1964-11-10 H V Hardman Company Inc Brush structure
US3172141A (en) * 1960-03-28 1965-03-09 Baker Brush Co Inc Brush construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10869544B2 (en) 2018-11-05 2020-12-22 The Sherwin-Williams Company Brush handle assembly and method for making
US20210100350A1 (en) * 2018-11-05 2021-04-08 The Sherwin-Williams Company Brush handle assembly and method for making

Also Published As

Publication number Publication date
NL6609933A (forum.php) 1967-01-30
DE1532780A1 (de) 1970-12-17
DE1532780B2 (de) 1977-01-13
ES130161U (es) 1968-07-01
ES130161Y (es) 1969-02-16

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