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Coating apparatus for applying a resin in particulate form

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Publication number
US2681637A
US2681637A US19904850A US2681637A US 2681637 A US2681637 A US 2681637A US 19904850 A US19904850 A US 19904850A US 2681637 A US2681637 A US 2681637A
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Prior art keywords
coating
material
casing
resin
particles
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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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George G Simpson
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Masonite Corp
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Masonite Corp
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22Addition to the formed paper
    • D21H23/52Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/64Addition to the formed paper by contacting paper with a device carrying the material the material being non-fluent at the moment of transfer, e.g. in form of preformed, at least partially hardened coating

Description

G. G. SIMPSON COATING APPARATUS FOR APPLYING June 22, 1954 A RESIN IN PARTICULATE FORM 2 Sheets-Sheet 1 Filed Dec. 4, 1950 INVENTOR GEORGE G. SIMPSON ATTQRNEY June 1954 e. G. SIMPSON 2,681,637

COATING APPARATUS FOR APPLYING A RESIN IN PARTICULATE FORM 2 Sheets-Sheet 2 Filed Dec. 4, 1950 INVENTOR GEORGE G. S/MPSON B & M)

ATTORNEY Patented June 22, 1954 COATING APPARATUS FOR APPLYING A RESIN IN PARTICULATE FORM George G. Simpson, Laurel, Miss., assignor to Masonite Corporation, Laurel, Miss., a corporation of Delaware Application December 4, 1950, Serial No. 199,048

2 Claims. (Cl. 118-308) This invention relates to the application of materials to surfaces, and more particularly to a coating apparatus for uniformly applying discrete solid particles, e. g. resins and the like, to the surface of sheet materials.

An object of this invention is an apparatus for applying discrete solid particles to surfaces. A further object is a coating apparatus for uniformly applying discrete solid particles, e. g. resins, to the surface of sheet materials. Yet a further object is an apparatus for applying these particles to the surface of sheet material and fusing them into a uniform film for coating the surfaces of sheet material such as hardboard and the like. Other objects will be apparent from the following description.

The above and other objects are accomplished according to this invention broadly by providing and employing an apparatus comprising a cylindrical casing with its axis horizontally disposed and the chamber within the casing closed at both ends and opened at the top and bottom, a feed supply means attached to the casing over the top opening, a feed diffuser means fed through the bottom opening, a shaft axially journaled in the ends of the casing, bristles which radiate from said shaft to the walls of said chamber and to the feed diffuser so as to provide a rotary brush for expelling theparticles which will make up the coating, means for driving said brush and means for conveying the material to be coated. Preferably the coating apparatus includes means, e. g. an air hammer, for vibrating the casing containing the brush. If the coating material applied is to be heated or fused, means for supplying heat is also provided.

A preferred embodiment of this invention will now be described in more detail with reference to the accompanying drawings which form a part of this application. Like reference numerals are used to indicate like parts.

Referring to the drawings generally:

Fig. 1 isa side elevation. in. partial section showing an apparatus embodying the general aspects of the invention. I j Fig. 2 is a cross section view along the line 22 of Fig. 1 showing the cylindrical casing, the rotary brush therein, the feed diffuser screen beneath the chamber, and the sheet material in position for being coated.

Fig. 3 is a cross section view along the line 3-3 of Fig. 1 showing the burners for fusing the coating material and the sheet material, and indicating the coating which has been. applied and fused on the sheet, and also showing the means for conveying the sheet material, and

Fig. 4 is a cross section of a modified form of support for the diffuser screen. i

The cylindrical casing l of sheet metal or the like is arranged with its axis horizontal, and is preferably of length substantially equal to the width of the surface to be coated and extends transversely thereof. The chamber la in the casing is closed at its ends 2. The casing is provided with a top inlet opening 3 and a. bottom outlet opening 4. These openings are of about the same length as the casing. An air hammer or hammers 5 vibrates the casing l and prevents caking or bridging of the resin particles. A feed hopper 6 supplies coating material to the chamber l a through opening 3 and has an adjustable feed regulating shutter I in its throat. A feed diffuser screen 8 is disposed across the opening 4 and the particles of coating material are delivered through the openings of the screen on to the sheet being coated. The delivery thereof is effected and controlled by a rotary brush comprising the shaft 9 and bristles I0 whose points contact and engage the screen 8. The rotary brush will have drive means (not shown), e. g. an electric motor preferably with speed control. A chute l5 conveys any spillage of the particles of coating material to the col lecting receptacle I6.

The heating means H, e. g. a bank of gas burners, beneath which the sheet with particles of coating material thereon is passed fuses the originally discrete particles l2 on to the surface of the sheet material I 3, forming an adherent film or coat [3a thereon. Conduit I1, header l8 and aspirators l9 supply gaseous fuel for heating the radiants 20. Conduit 2| supplies compressed air to the air hammers 5.

The coating apparatus is supported by the table 22 having legs 23. Conveying means, e. g. driven table rolls I 4, convey the sheet material I3 to be coated beneath and beyond the feed diffuser 8 as indicated by arrow on Fig. 1. After leaving the conveyor comprising the rolls II, the sheet material carrying the resin particles is passed beneath the radiants 20 or other heat source by means of a metal heat-resisting conveyor comprising sprockets 24 and chain 25 from which the coated sheets are delivered. Both conveyors are flat and level to prevent the boards or sheets getting out of level.

As shown in Fig. 4 the screen 8 may be attached removably and replaceably to casing I as by securing it to a framepiece 8a and attaching such part Ba to the casing by screws 8b. When the particle size of resin is changed the feed screen with corresponding. size openings can thus be used. To support the screen from beneath, cross bars 80 can be provided at suitably spaced intervals. The framepiece 8a consists of parallel angle-shaped members which extend across the width of the cylindrical casing I, The opposed faces of the angle-shaped members extend downwardly from the feed diffuser 8 and serve to guide or restrict the flow of the discrete resin particles and to direct them over a limited area of the sheet material to becoated.

In starting the coating apparatus the conveyor table rolls l4 and the. sprocket chain 25 are started, the gas burners H are ignited, the hoping the adjustment stage the resin used passes into the chute i and is recovered in receptacle it: for reuse. After the starting adjustments have been made and the desired temperature has been reached by adjustment'of the gaseous fuel supply, hardboards i3 are placed on the" conveyor table rolls: i l with the ends of the boards abutting each other. These rolls convey the boards beneath the casing i. The bristles force resin particles through the feed diffuser screen 8, and to improve the forcing action the shaft 9 may be made vertically adjustable to compensate for wear of the bristle tips. The particles of resin fall onto the top surface of the boards, forming a remarkably uniform layer over the entire surface area of the boards. The boards with their supernatant layer of resin particles pass under the gas burners i adjacent to the resin applying apparatus. The heat from the burners fuses the resin andcauses its particles to coalesce and adhere to the surface of the boards in, the form of a continuous and very uniform film. Shortly after passing from beneath the burners, the film isnon-tacky.

The thus coated boards may be used as a finished product at this point if only a sing-le'ply having a protective film is desired. If it is desired tc form a laminated product,.the coated boards may be laminated immediately (e. g. in a hot press) or they may be stored any length of time desired before laminating. If both surfaces of. the boards are to be coated, they may be run through the coating apparatus a second time with the uncoated surface up.

A remarkable feature of this invention is the high degree of uniformity of the coating applied. This especially important in coating sheets to be laminated in order to give a uniformly strong bond and to prevent the possibility of uneven moisture content in the sheets resulting from the I 7 heat driving off moisture from thinly coated areas during fusion of the coating material, or from the evaporation or migration of moisture during hot pressing of the coated sheets into a laminated product.

While details of the invention have been disclosed above in showing the preferred construction and operation of the apparatus, modificaregulator 1 renders a single hopper adaptable for use with many types of coating materials. In some coating operations it is not desired to heat the coating material applied. In such case, of course, heating elements are not used. If heat is needed other sources besides gas may be used.

While Tampico bristles (vegetable fiber bristles) have given very good results, animal bristles, metallic bristles, synthetic bristles and other types of fiber bristles are applicable. Although the screen of wire mesh 8 works well as a feed diffuser, any suitable perforated member may be employed.

The circumferential speed of the bristles, the linear speed of the material being coated, the type discrete solid particles used as 'a coating material, the temperature employed in. heating the coating material, the amount of coating material applied, the particular type and mesh size of. the feed diffuser screen, and other variables may be regulated, varied or modified as desired. These and other regulations and modifications are withinthe' skill. of the artisan.

Although this invention been described in detail with reference to coating hardboards, it is applicable to applying coating materials to the surfaces of materials in'general, such as e. g. veneers, lumber, metal sheets, paper.

It is to be understood that the invention is not to be limited to specific embodiments thereof except as defined in the claims.

' I claim:

1. A coating apparatus for applying a resin in the form of discrete solid particles uniformly on the surface. of a sheet material which comprises a horizontally disposed cylindrical casing having a chamber therein closed at both ends and open at the top and bottom, means for vibratin the casing, a hopper for feeding the resin to the-container attached to the casing over the' top openmg, means attached to the throat of the hopper for regulating the feed of resin to the chamber, a feed diffuser screen fitted into the bottom casmg opening and attached to the casing by means of parallelv angle-shaped members with the opposed faces of said angle-shaped members forming downwardly extending guide members for the discrete resin particles, a shaft axially journaled in the chamber, bristles which radiate from said shaft to contact the feed diffuser, the tips of said bristles forming an essentially continuous pethe form of discrete solid particles uniformlyon the surface of a sheet material which comprises a horizontally disposed cylindricalv casinghaving a chamber therein closed at both endsrand open at the top and bottom, an air hammer for vibrating thecasing, a hopper for feeding the resin to the container attached to the casing over the top opening, means attached to the throat of the hopper for regulating the feed of resin to the chamber, a feed diffuser screen fitted into the bottom casin opening and attached to the casing by means of parallel angle shaped members with the opposed faces of said angle-shaped members forming downwardly extending guide members for the discrete resin particles, a shaft axially journaled in the chamber, bristles which radiatefrom said shaft to contact the feed diffuser, the tips of said bristles forming an essentially continuous periphery substantially coex- 15 2'557'561 tensive with the inner surface of said cylindrical casing, means for driving said shaft, and means for conveying the sheet material being coated.

References Cited in the file of this patent UNITED STATES PA'IENTS Number Name Date 465,815 Claus Dec. 22, 1891 841,685 Harris Jan. 22, 1907 1,659,179 Wilson Feb. 14, 1928 1,904,591 Wilson Apr. 18, 1933 2,112,759 Boyer Mar. 29, 1938 2,211,435 Peterson Aug. 13, 1940 Powers June 19, 1951

US2681637A 1950-12-04 1950-12-04 Coating apparatus for applying a resin in particulate form Expired - Lifetime US2681637A (en)

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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754728A (en) * 1951-11-17 1956-07-17 William J Runckel Raintable hardboard and process of making the same
US2808021A (en) * 1956-01-26 1957-10-01 Kitchens Of Sara Lee Inc Material feeding and distributing apparatus
US2808098A (en) * 1954-02-26 1957-10-01 Permex Corp Method and apparatus for bonding fibers together
US2890147A (en) * 1954-12-23 1959-06-09 Owens Corning Fiberglass Corp Method of making metal-reinforced boards of mineral fibers
US2940422A (en) * 1956-06-22 1960-06-14 Dott Caspar Apparatus for sprinkling band-like webs or foils, more particularly roofing felts
US3085548A (en) * 1959-05-01 1963-04-16 Monsanto Chemicals Apparatus for continuous deposition of particulate material
US3167442A (en) * 1960-02-12 1965-01-26 Internat Protected Metals Inc Method of forming a resin coating on metal
US3414426A (en) * 1959-08-21 1968-12-03 Chamberlain Mfg Corp Means for and method of applying mosaic to curvate surfaces
US3459154A (en) * 1966-01-14 1969-08-05 Lakewood Brick & Tile Co Apparatus for producing mottled brick
US3817206A (en) * 1972-05-26 1974-06-18 W Case Apparatus for coating edible material
US3918399A (en) * 1971-08-25 1975-11-11 Ici Ltd Spreading of particulate matter
US4080928A (en) * 1976-08-26 1978-03-28 Atron, Inc. Apparatus for applying and adhering particulate thermoplastic materials to supporting substrates
US4176619A (en) * 1976-12-21 1979-12-04 Sca Development Aktiebolag Paper surface treating device
WO1988001205A1 (en) * 1986-08-14 1988-02-25 Data Card Corporation Image permanence method and device
US4869921A (en) * 1986-08-14 1989-09-26 Pierce Companies, Inc. Image permanence method
US5268195A (en) * 1991-06-18 1993-12-07 Mahle-J. Wizemann Gmbh & Co. Kg Method and apparatus for producing finely pulverized sand particles for use in the production of casting molds and for coating with the finely pulverized sand particles models for shaped castings
EP0609808A1 (en) * 1993-02-02 1994-08-10 TOKAI PULP Co., Ltd. Thermo-adhesive, water-soluble or water-decomposable paper and method of manufacturing the same
US20020119255A1 (en) * 2000-05-09 2002-08-29 Ranjith Divigalpitiya Method and apparatus for making particle-embedded webs
US20030129302A1 (en) * 2000-05-09 2003-07-10 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
US20070092593A1 (en) * 2005-10-20 2007-04-26 Quantumsphere, Inc. Apparatus for uniform feeding of powders
US7803295B2 (en) 2006-11-02 2010-09-28 Quantumsphere, Inc Method and apparatus for forming nano-particles
US20110290918A1 (en) * 2010-05-26 2011-12-01 Sun Chemical Corporation Process for efficient milling of particles to a predetermined particle size and/or particle size distribution
ES2407805A1 (en) * 2013-03-15 2013-06-14 Silcotech, S.L. Used nonstick treatment for thermoplastic pieces and / or elastomeric
US20150255778A1 (en) * 2012-09-25 2015-09-10 Zeon Corporation Powder supply device for secondary battery and apparatus for manufacturing electrode body
US20150284189A1 (en) * 2011-03-16 2015-10-08 Columbia Phytotechnology, Llc Apparatus for dispensing material
US20160056493A1 (en) * 2013-03-25 2016-02-25 Zeon Corporation Powder supplying device and electrode manufacturing apparatus
US9455118B1 (en) * 2012-10-10 2016-09-27 Xyleco, Inc. Processing materials

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US465815A (en) * 1891-12-22 glaus
US841685A (en) * 1904-11-01 1907-01-22 American Tobacco Co Printing and bronzing machine.
US1659179A (en) * 1926-06-04 1928-02-14 B L Nicholes & Co Inc Powder-distributing machine
US1904591A (en) * 1928-11-21 1933-04-18 B L Nicholes & Company Inc Powder distributing machine
US2112759A (en) * 1935-12-14 1938-03-29 Boyer Robert Ray Apparatus for preparing bandages
US2211435A (en) * 1938-04-28 1940-08-13 Harbor Plywood Corp Spreader machine
US2557561A (en) * 1948-09-30 1951-06-19 Powers Photo Engraving Company Plate powdering machine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US465815A (en) * 1891-12-22 glaus
US841685A (en) * 1904-11-01 1907-01-22 American Tobacco Co Printing and bronzing machine.
US1659179A (en) * 1926-06-04 1928-02-14 B L Nicholes & Co Inc Powder-distributing machine
US1904591A (en) * 1928-11-21 1933-04-18 B L Nicholes & Company Inc Powder distributing machine
US2112759A (en) * 1935-12-14 1938-03-29 Boyer Robert Ray Apparatus for preparing bandages
US2211435A (en) * 1938-04-28 1940-08-13 Harbor Plywood Corp Spreader machine
US2557561A (en) * 1948-09-30 1951-06-19 Powers Photo Engraving Company Plate powdering machine

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754728A (en) * 1951-11-17 1956-07-17 William J Runckel Raintable hardboard and process of making the same
US2808098A (en) * 1954-02-26 1957-10-01 Permex Corp Method and apparatus for bonding fibers together
US2890147A (en) * 1954-12-23 1959-06-09 Owens Corning Fiberglass Corp Method of making metal-reinforced boards of mineral fibers
US2808021A (en) * 1956-01-26 1957-10-01 Kitchens Of Sara Lee Inc Material feeding and distributing apparatus
US2940422A (en) * 1956-06-22 1960-06-14 Dott Caspar Apparatus for sprinkling band-like webs or foils, more particularly roofing felts
US3085548A (en) * 1959-05-01 1963-04-16 Monsanto Chemicals Apparatus for continuous deposition of particulate material
US3414426A (en) * 1959-08-21 1968-12-03 Chamberlain Mfg Corp Means for and method of applying mosaic to curvate surfaces
US3167442A (en) * 1960-02-12 1965-01-26 Internat Protected Metals Inc Method of forming a resin coating on metal
US3459154A (en) * 1966-01-14 1969-08-05 Lakewood Brick & Tile Co Apparatus for producing mottled brick
US3918399A (en) * 1971-08-25 1975-11-11 Ici Ltd Spreading of particulate matter
US3817206A (en) * 1972-05-26 1974-06-18 W Case Apparatus for coating edible material
US4080928A (en) * 1976-08-26 1978-03-28 Atron, Inc. Apparatus for applying and adhering particulate thermoplastic materials to supporting substrates
US4176619A (en) * 1976-12-21 1979-12-04 Sca Development Aktiebolag Paper surface treating device
WO1988001205A1 (en) * 1986-08-14 1988-02-25 Data Card Corporation Image permanence method and device
US4779558A (en) * 1986-08-14 1988-10-25 Pierce Companies, Inc. Image permanence device
US4869921A (en) * 1986-08-14 1989-09-26 Pierce Companies, Inc. Image permanence method
US5268195A (en) * 1991-06-18 1993-12-07 Mahle-J. Wizemann Gmbh & Co. Kg Method and apparatus for producing finely pulverized sand particles for use in the production of casting molds and for coating with the finely pulverized sand particles models for shaped castings
EP0609808A1 (en) * 1993-02-02 1994-08-10 TOKAI PULP Co., Ltd. Thermo-adhesive, water-soluble or water-decomposable paper and method of manufacturing the same
US6834612B2 (en) * 2000-05-09 2004-12-28 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
US20030129302A1 (en) * 2000-05-09 2003-07-10 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
US20020119255A1 (en) * 2000-05-09 2002-08-29 Ranjith Divigalpitiya Method and apparatus for making particle-embedded webs
US7713043B2 (en) * 2005-10-20 2010-05-11 Quantumsphere, Inc. Apparatus for uniform feeding of powders
US20070092593A1 (en) * 2005-10-20 2007-04-26 Quantumsphere, Inc. Apparatus for uniform feeding of powders
US8500427B2 (en) 2006-11-02 2013-08-06 Quantumsphere, Inc. Method and apparatus for forming nano-particles
US7803295B2 (en) 2006-11-02 2010-09-28 Quantumsphere, Inc Method and apparatus for forming nano-particles
US20110014310A1 (en) * 2006-11-02 2011-01-20 Quantumsphere, Inc. Method and apparatus for forming nano-particles
US20110290918A1 (en) * 2010-05-26 2011-12-01 Sun Chemical Corporation Process for efficient milling of particles to a predetermined particle size and/or particle size distribution
US9550629B2 (en) * 2011-03-16 2017-01-24 Columbia Phytotechnology. LLC Apparatus for dispensing material
US20150284189A1 (en) * 2011-03-16 2015-10-08 Columbia Phytotechnology, Llc Apparatus for dispensing material
US20150255778A1 (en) * 2012-09-25 2015-09-10 Zeon Corporation Powder supply device for secondary battery and apparatus for manufacturing electrode body
US9825279B2 (en) * 2012-09-25 2017-11-21 Toyota Jidosha Kabushiki Kaisha Powder supply device for secondary battery and apparatus for manufacturing electrode body
US9455118B1 (en) * 2012-10-10 2016-09-27 Xyleco, Inc. Processing materials
US9644244B2 (en) 2012-10-10 2017-05-09 Xyleco, Inc. Processing materials
US9789461B2 (en) 2012-10-10 2017-10-17 Xyleco, Inc. Processing materials
ES2407805A1 (en) * 2013-03-15 2013-06-14 Silcotech, S.L. Used nonstick treatment for thermoplastic pieces and / or elastomeric
US20160056493A1 (en) * 2013-03-25 2016-02-25 Zeon Corporation Powder supplying device and electrode manufacturing apparatus

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