[go: up one dir, main page]

US3017947A - Acoustical material and method of making the same - Google Patents

Acoustical material and method of making the same Download PDF

Info

Publication number
US3017947A
US3017947A US66640757A US3017947A US 3017947 A US3017947 A US 3017947A US 66640757 A US66640757 A US 66640757A US 3017947 A US3017947 A US 3017947A
Authority
US
United States
Prior art keywords
sheet
irregularly shaped
fibers
shaped elongated
tile
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
Other languages
English (en)
Inventor
Lewis W Eckert
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.)
Armstrong World Industries Inc
Original Assignee
Armstrong Cork Co
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
Priority to BE568617D priority Critical patent/BE568617A/xx
Application filed by Armstrong Cork Co filed Critical Armstrong Cork Co
Priority to US66640757 priority patent/US3017947A/en
Priority to US66640657 priority patent/US3013626A/en
Priority to GB1931958A priority patent/GB851315A/en
Priority to CH6068458A priority patent/CH363784A/fr
Priority to DE19581303874D priority patent/DE1303874C2/de
Priority to US12390461 priority patent/US3013937A/en
Application granted granted Critical
Publication of US3017947A publication Critical patent/US3017947A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8245—Machines for manufacturing, shaping, piercing or filling sound insulating elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9411—Cutting couple type
    • Y10T83/9423—Punching tool
    • Y10T83/9428—Shear-type male tool

Definitions

  • This invention relates to an acoustical material and ymethod of making the same, and more particularly to a method in which the base material is dried, after which the surface is ruptured to form irregularly shaped elongated sound-absorbing openings to expose the interstices existing between the fibers in the body of the material.
  • the one method is the drilling of holes from the face through substantially the entire depth of the material
  • the second method is the reorientation of the fibers of which the material is composed to form openings in the surface leading to fissures between the fibers.
  • the purpose of these methods is to expose'the fibrous structure of the interior of the board for entrapping sound and thereby giving the room in which the material is installed the desired acoustical treatment.
  • the fissuring method has been limited to certain types of materials composed of relatively short fibers which are not intertwined to any great extent.
  • Typical of the acoustical materials which can be fissured during the wet forming process are the ones made from a slurry of mineral wool and/or glass wool and the like, in which lthe fibers are present in clumps and are coated with a starch binder.- When this newly formed slurry is screeded or subjected to controlled pressure by a fissuring roll, as shown in United States Patent No.
  • the clumps are reoriented to such an extent that the laminae of clumps forming the face layer are tilted so as to form a surface on the slurry which is discontinuous by reason of the fact that short sections thereof are disposed at a slight angle with respect to the longitudinal plane of the slurry, exposing crevices or fissures between adjacent areas of disrupted surface.
  • the starch binder has not set when the surface of the slurry is subjected to this fissuring operation, the individual fibers in the clumps are free to reorient themselves with respect to the other fibers and the clumps are free to reorient themselves with respect to the other clumps.
  • the surface When the water of formation is removed from the fibrous mass and the binder sets, the surface maintains a tilted appearance with the fissures disposed therebetween.
  • the rough surface is removed by a sanding or grinding operation, the face of the sheet is discontinuous with fissures disposed haphazardly thereover.
  • acoustical material currently sold in large volumes is that formed from a water-laid mat of vegetable fibers similar to conventional insulating board.
  • this type product in order to attain the necessary strength and still keep the binder content low enough to provide sufficient interstices between the intertwined fibers, it is essential that the fiber length be carefully controlled. If the percentage of short fibers is too great, the sheet is too dense and will not be suitable as a sound-absorbing material.
  • This invention has been developed to provide a means whereby the conventional fiberboard type acoustical materials, as well as the previously dried mineral wool and glass wool materials, can be treated to give the same appearance as the mineral wool fibrous materials which have been wet fissured.
  • the method here under consideration is directed to a punching operation in which a heavy plate is pressed into the surface of the dry fibrous sheet.
  • This plate has in relief thereon the design of the irregularly shaped elongated openings desired for the finished acoustica1 material.
  • This plate may be made of any of the conventional alloys suitable for withstanding the stress and wear resulting from the high speed operation, and the projections which are forced into the fiberboard have rather rough jagged edges so as to prevent the actual cutting of the fibers in the board but instead merely push a portion of the surface of the sheet into the sheet, leaving exposed edges along the openings as the plate projections enter the material to form sound-absorbing openings in the material.
  • These openings, while devoid of fibers themselves, are lined with loosely entwined fibers which absorb and entrap sound. The projection entering the material does not actually cut the surface but tears a portion from the surface and pushes it into the body of the material.
  • An object of this invention is to provide a fiberboard acoustical material of the vegetable fiber type which has irregularly shaped elongated openings therein similar in appearance to the wet formed fissures in some of the acoustical materials made from mineral fibers.
  • Another object of this invention is to provide a method whereby fibrous acoustical material may be treated after it has been formed from a water-laid mass of fibrous material and dried to present irregularly shaped elongated openings on the surface.
  • a still further object of this invention is to provide a method whereby the surface of fiberboard may be disrupted by placing irregularly shaped elongated openings therein without changing the dimensional stability of the fiberboard.
  • a still further object of this invention is to provide a method whereby the portion of material at the bottom of the irregularly shaped elongated opening is of a darker shade so that the opening will be more pronounced.
  • FIGURE 1 shows a face view of the sound-absorbing surface of the fiberboard of this invention
  • FIGURE 2 shows a back view of the fiber-board
  • FIGURE 3 is a diagrammatic view of the forming, drying and dyeing process
  • FIGURE 4 is a continuation of the right-hand end of FIGURE 3, showing a side elevational view of the equipment used for placing the sound-absorbing openings in the face of the tile and the embossed pattern on the back of the tile;
  • FIGURE 5 is an enlarged cross-sectional view of the tile produced by the method, taken on line 5-5 of FIG. l.
  • the fiberboard sheet material 2 (FIG. 3) is produced in the conventional manner on a Wet forming board machine I8 such as that shown in U.S. Patent No. 1,927,360 and dr-ied to the desired degree in a conventional drier 19 such as shown in US. Patent No. 1,990,554.
  • a dark dye is doctored on the surface of the board at the wet end by means of a doctoring device 20 such as that shown in U.S. Patent No. 1,944,528.
  • the dye is applied from a tube ZI to the surface of the board 2.
  • the doctor blade 22 carried by the support 23 levels the dye into a smooth, uniform coat on the surface 10 of the board.
  • the blanks are then fed over conventional rollers 2,4 to a suitable punch press 3 (FIG. 4).
  • These blanks are usually of a 4' x 8 size, and the punch press 3 which places irregularly shaped elongated openings 4 in the material is provided with a plate S which is 4 x l. In the preferred embodiment, this is made up of a plurality of square plates l x l".
  • the board 2 is fed intermittently through the press 3, with each stroke of the press placing openings in a new area of the blank.
  • small holes 6 may be punched inthe intermediate areas between the irregularly shaped elongated openings 4; and if fine punches are used, the holes will not be obvious to 'the eye of a casual observer, but nevertheless a great amount of sound will be absorbed by the small punched holes, increasing the accessibility to the interior, thus greatly increasing the eli'lciency of the acoustical material.
  • These small pins can be on the same plate as the irregularly shaped elongated projections if desired, but the preferred arrangement of the pins is to form a separate plate 7 positioned in the punch press 3, adjacent the plate S having the irregularly shaped projections.
  • a 4 x l section of the sheet 2 will be subjected to the irregularly shaped projections 8 and the adjacent 4 x l section will be subjected to the pins 9. inasmuch as the board 2 moves only the width of one plate on each stroke of the press, one section is completed in each stroke of the press and the adjacent section is half completed. This, of course, does not hold true for the first stroke of the press at the start of a sheet; however, after the press is started, the sheets are fed in abutting relationship.
  • both the plate having the elongated projections 8 and the plate having the pins 9 should be so .arranged that neither the irregularly shaped elongated openings 4 nor the punched holes 6 will occur close to the edges of the cut tile, making it possible to produce tile having strong edges.
  • the pins 9 utilized in punching the holes 6 in the acoustical tile between 'the irregularly shaped elongated openings are preferably of a unique design to produce the desired amount of sound absorption and at the same time produce a clear-cut opening on the surface so as not to .be ,readily discernible on mere visual observation.
  • pins of a diameter of approximately .100 which have had the pointed tips ground down to a flat tip lapproximately .050" in diameter.
  • This design of pins overcomes the objection to a pierced hole made by a sharp pointed instrument in that the instrument is forced into the material and the bers are merely pushed aside and upon Withdrawal of the pointed object the fibers tend to come together again and more or less heal the opening. This is particularly true of holes made by o-bjects of such small diameter.
  • the blunt nose engages the surface of the material first, and as it enters the material it pushes and tears the iibers, disarranging the laminae of the iibers along the edges.
  • the taper on the punch beyond the blunt end increases'the size of the hole, and in so doing takes care of any slight damage such as irregular tears which might occur on thesurface of the tile due to the blunt end of the punch entering the material.
  • VThe hole resulting after the punch is withdrawn has a clean-cut appearance, while the sideof the hole has disarranged laminae of fibers, exposing the interstices of the material for sound-absorption purposes.
  • the indentations I3 remaining on the tile are approximately W16 long x 1/16" wide, with 1/s" space therebetween, both lengthwise and sidewise These indented areas are depressed to a depth of approximately 1/32. It may be found that other designs of back ber disruption may be mo-re desirable ⁇ for other thicknesses or other 'fiber compositions.
  • the back of the tile may be sanded to remove the indentations I3 or they may be retained on the back of the tile.
  • the blank to be punched is positioned over the bed plate I2 having the desired design, and as the press 3 closes the plate 5 on the press forms the irregularly shaped elongated openings in the face 10 of the tile and presses the back 1I of the tile against the bed plate 12 to impart a design on the back similar to that shown in FIG- URE 2 of the drawing.
  • the number of indentations 13 embossed on the back of the tile should be determined to a 'certain extent by the number of irregularly shaped elongated openings 4 placed in the face of the tile.
  • the board When high-grade wood fibers are used in the manufacture of fiberboard, the board is rather light in color and there is no great contrast from the usual white or ivory paint applied to the surface ⁇ of the tile after the manufacturing operation has been completed.
  • a certain area of the surface of the tile is formed into the tile and forms the bottom of the irregularly shaped elongated opening 4. This is undesirable, because with this light-colored material in the bottom of the opening, the opening does not stand out to any appreciable extent.
  • the surface of the sheet is treated with a dark dye prior to the punching step.
  • the dye may be included throughout the body of the material so that the interior of the irregularly shaped elongated openings will 4be darker than the paint applied to the surface. Also the dye can be applied to the surface of the tile after the punching operation and then wiped into the opening by a squeegee, thus coating the interior of the openings with the dye.
  • the plate 5 which is urged into engagement with the surface of the material to form the irregularly shaped elongated openings 4 is preferably made so that the projections are not sharp on their outer extremity but are blunt and will, therefore, have a punching and tearing effect rather than a cutting effect.
  • An opening formed with this type of instrument will maintain its original configuration rather than close as will be the case of an opening which is merely cut in the material by a sharp instrument being thrust into it and withdrawn. This gives a better opening for sound absorption purposes than the type made from a sharp cutting instrument which merely severes the fibers and forms an opening in the surface of the material compacting the fibers along the edges thereof.
  • the desired type of plate has a definite punching and tearing effect on the fberboard rather than a cutting effect.
  • This tearing and delaminating process not all laminae 14 are torn on the same vertical plane; but as the projection continues into the material, it tears a larger area from each lamina 14 as it progresses resulting in an undercut effect 15 so that the inner opening 16 is really larger than it appears on the surface.
  • the material is painted after punching; however, if such painting is done by the roller applicator, it will be understood that the area 17 in the bottom of the opening will not be affected by the paint. It will be obvious to those skilled in the art that the article and method herein described can be carried out to form an acoustical material which will have the appearance of the more expensive wet ssured material and have the high coefficient of sound absorption of the conventional punched type sound absorption material.
  • the method may be set up in production line technique and may be used for both vegetable fiber tiles and mineral ber tile.
  • a method of producing sound absorbing material comprising forming a water-laid mat of fibrous material with suitable binder constituents, drying said mat to form a sheet of intertwined fibers having sound absorbing interstices throughout and having a relatively smooth impervious surface, coating one flat surface of said sheet with a dark dye, urging a plurality of irregularly shaped elongated projections into engagement with the dyed surface of said sheet to push certain areas of said surface into the body -of the sheet exposing sound absorbing interstices in the interior of the sheet and forming irregularly shaped elongated openings on the surface of said sheet, and simultaneous with the forcing of the irregularly shaped elongated projections into the surface of the sheet embossing a pattern on the back of said sheet.
  • a method of producing sound absorbing material comprising forming a water-laid mat of fibrous material with suitable binder constituents, drying said mat to form a sheet of intertwined fibers having sound absorbing interstices throughout and having a relatively smooth impervious surface, coating one fiat surface of said sheet with a dark dye, urging a plurality of irregularly shaped elongated projections into engagement with the dyed surface of said sheet to push certain areas of said surface into the body of the sheet, exposing the sound absorbing interstices in the interior of the sheet and forming irregularly shaped elongated openings on the surface of the sheet, and simultaneously therewith urging an embossing plate into engigement with the back of the sheet to emboss a grid design thereon.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Paper (AREA)
US66640757 1957-06-18 1957-06-18 Acoustical material and method of making the same Expired - Lifetime US3017947A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE568617D BE568617A (xx) 1957-06-18
US66640757 US3017947A (en) 1957-06-18 1957-06-18 Acoustical material and method of making the same
US66640657 US3013626A (en) 1957-06-18 1957-06-18 Acoustical material
GB1931958A GB851315A (en) 1957-06-18 1958-06-17 A felted fibrous sound-absorbing material and method of making same
CH6068458A CH363784A (fr) 1957-06-18 1958-06-17 Procédé de fabrication d'une matière absorbant les sons, matière obtenue par ce procédé et machine pour la mise en oeuvre dudit procédé
DE19581303874D DE1303874C2 (de) 1957-06-18 1958-06-18 Verfahren zur herstellung von schallschluckplatten
US12390461 US3013937A (en) 1957-06-18 1961-07-13 Method of making acoustical material

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US66640857A 1957-06-18 1957-06-18
US66640757 US3017947A (en) 1957-06-18 1957-06-18 Acoustical material and method of making the same
US66640657 US3013626A (en) 1957-06-18 1957-06-18 Acoustical material
US12390461 US3013937A (en) 1957-06-18 1961-07-13 Method of making acoustical material

Publications (1)

Publication Number Publication Date
US3017947A true US3017947A (en) 1962-01-23

Family

ID=27494505

Family Applications (3)

Application Number Title Priority Date Filing Date
US66640757 Expired - Lifetime US3017947A (en) 1957-06-18 1957-06-18 Acoustical material and method of making the same
US66640657 Expired - Lifetime US3013626A (en) 1957-06-18 1957-06-18 Acoustical material
US12390461 Expired - Lifetime US3013937A (en) 1957-06-18 1961-07-13 Method of making acoustical material

Family Applications After (2)

Application Number Title Priority Date Filing Date
US66640657 Expired - Lifetime US3013626A (en) 1957-06-18 1957-06-18 Acoustical material
US12390461 Expired - Lifetime US3013937A (en) 1957-06-18 1961-07-13 Method of making acoustical material

Country Status (5)

Country Link
US (3) US3017947A (xx)
BE (1) BE568617A (xx)
CH (1) CH363784A (xx)
DE (1) DE1303874C2 (xx)
GB (1) GB851315A (xx)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077945A (en) * 1959-08-07 1963-02-19 Wood Conversion Co Production of acoustic tile material and tile therefrom
US3137364A (en) * 1958-10-06 1964-06-16 Wood Conversion Co Manufacture of perforated acoustic bodies
US3143026A (en) * 1962-10-01 1964-08-04 Wood Conversion Co Tool for punching acoustic holes
US3159236A (en) * 1958-10-06 1964-12-01 Wood Conversion Co Manufacture of perforated acoustic boards
US3167151A (en) * 1962-06-07 1965-01-26 Johns Manville Acoustical panel
US3202561A (en) * 1961-03-30 1965-08-24 Johns Manville Method for making acoustical tile with thermoplastic film covering
US3202025A (en) * 1959-09-28 1965-08-24 Wood Conversion Co Tool for producing fissures in mineral felt
US3230813A (en) * 1960-10-10 1966-01-25 Wood Conversion Co Die and punch platen
US3255843A (en) * 1959-10-02 1966-06-14 Owens Corning Fiberglass Corp Fibrous acoustical panel with continuously adhered surface film and method of making same
US3261424A (en) * 1962-01-29 1966-07-19 Kaiser Gypsum Company Inc Cellulosic fibrous sheet having fissures which are free of nonfibrous and disintegrated fibrous material
US3325302A (en) * 1963-06-14 1967-06-13 Armstrong Cork Co Method for producing roller embossed warp-resistant fiberboard
US3398811A (en) * 1961-08-28 1968-08-27 United States Gypsum Co Acoustical tile with vibratile membrane extending into fissures
US3470978A (en) * 1968-11-22 1969-10-07 Conwed Corp Punched acoustical board
US20190071868A1 (en) * 2017-09-01 2019-03-07 Industrial Technology Research Institute Sound absorbing material

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086878A (en) * 1960-11-01 1963-04-23 Minnesota & Ontario Paper Co Process for fissuring acoustical fiberboards
US3202570A (en) * 1961-06-12 1965-08-24 Wood Conversion Co Method of forming a fiberboard containing a fire-retardant hydrated borate and product thereof
US3181279A (en) * 1962-01-29 1965-05-04 Kaiser Gypsum Company Inc Method and device for producing patterned-surface sheet material
US3248834A (en) * 1963-10-29 1966-05-03 Polis Charles Simulated brick interior siding assembly
US3357847A (en) * 1963-12-13 1967-12-12 Flintkote Co Method of treating the outer surface of softboard products
US3422920A (en) * 1965-07-01 1969-01-21 Owens Corning Fiberglass Corp Acoustical panels
US3771213A (en) * 1969-12-19 1973-11-13 Armstrong Cork Co Method of forming an embossed foil-covered ceiling panel
US3726056A (en) * 1971-05-12 1973-04-10 Johns Manville Textural panel
US3974722A (en) * 1973-06-20 1976-08-17 Mobil Oil Corporation Method of forming recesses in thermoplastic tray
US4037499A (en) * 1974-01-26 1977-07-26 Conwed Corporation Method and apparatus for perforating fibrous board surfaces in non-repetitive patterns
US4040213A (en) * 1975-08-22 1977-08-09 Capaul Raymond W Unitary structural panel for ceiling and wall installations
US4056647A (en) * 1975-12-29 1977-11-01 Armstrong Cork Company Powder edge coating for ceiling tile
US4911788A (en) * 1988-06-23 1990-03-27 The Celotex Corporation Method of wet-forming mineral fiberboard with formation of fiber nodules
DE19814954C2 (de) * 1998-04-03 2002-03-21 Gustav Bohrenkaemper Dampfdurchlässige Platte
US6648100B2 (en) * 2001-10-24 2003-11-18 Lear Corporation Method of tuning acoustical absorption in a vehicle interior
USD804060S1 (en) * 2015-08-21 2017-11-28 Kone Corporation Ceiling panel
EP3324403B1 (en) * 2016-11-17 2019-06-12 Autoneum Management AG Automotive noise attenuating trim part with acoustically decoupling foam
USD882276S1 (en) * 2018-05-22 2020-04-28 Berry Global, Inc. Nonwoven fabric
US20230203805A1 (en) * 2021-12-27 2023-06-29 Calum W. Smeaton Apparatus with Interchangeable Panels for Varying Acoustic and Esthetic Treatments or Effects

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1856898A (en) * 1928-03-30 1932-05-03 Alan D Wood Fabrication of embossed metallic plates
US1875074A (en) * 1927-08-05 1932-08-30 Masonite Corp Acoustical board
US2008278A (en) * 1933-10-03 1935-07-16 Halsam Products Company Embossed wheel
US2355454A (en) * 1943-04-13 1944-08-08 Johns Manville Method and apparatus for the production of sound-absorbing materials
US2572470A (en) * 1949-09-15 1951-10-23 Allen Ind Grid and waffle design rug cushion
US2611434A (en) * 1948-01-12 1952-09-23 Charles M Mugler Coring or perforating device
US2668123A (en) * 1948-09-25 1954-02-02 Certain Teed Prod Corp Method of producing acoustical tile
US2667925A (en) * 1948-12-23 1954-02-02 Certain Teed Prod Corp Method of providing perforations in acoustical tiles
US2717538A (en) * 1953-01-15 1955-09-13 Armstrong Cork Co Method and apparatus for fissuring fibrous materials
US2791289A (en) * 1952-12-10 1957-05-07 Simpson Timber Co Process of forming fissured fiber acoustical tile and product thereof
US2874796A (en) * 1955-05-02 1959-02-24 Armstrong Cork Co Method of fabricating a sound-absorbing unit from cellulosic material

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US238181A (en) * 1881-02-22 Wood-graining machine
US1751249A (en) * 1927-06-23 1930-03-18 Maurice C Rosenblatt Acoustic treatment
US1945003A (en) * 1931-03-26 1934-01-30 Johns Manville Surfacing of rigid shingles and the like
US2378618A (en) * 1941-12-19 1945-06-19 Celotex Corp Apparatus for perforating material
US2581993A (en) * 1943-09-17 1952-01-08 United States Gypsum Co Process of making acoustical tile
US2459121A (en) * 1943-09-17 1949-01-11 United States Gypsum Co Acoustical tile
US2577241A (en) * 1947-06-25 1951-12-04 Gibson Alfred Method of making textured building blocks
US2652126A (en) * 1949-12-24 1953-09-15 Mazer Jacob Sound-absorbing structure
US2670500A (en) * 1950-08-08 1954-03-02 Glanzstoff Ag Process for the production of porous foils from viscose

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875074A (en) * 1927-08-05 1932-08-30 Masonite Corp Acoustical board
US1856898A (en) * 1928-03-30 1932-05-03 Alan D Wood Fabrication of embossed metallic plates
US2008278A (en) * 1933-10-03 1935-07-16 Halsam Products Company Embossed wheel
US2355454A (en) * 1943-04-13 1944-08-08 Johns Manville Method and apparatus for the production of sound-absorbing materials
US2611434A (en) * 1948-01-12 1952-09-23 Charles M Mugler Coring or perforating device
US2668123A (en) * 1948-09-25 1954-02-02 Certain Teed Prod Corp Method of producing acoustical tile
US2667925A (en) * 1948-12-23 1954-02-02 Certain Teed Prod Corp Method of providing perforations in acoustical tiles
US2572470A (en) * 1949-09-15 1951-10-23 Allen Ind Grid and waffle design rug cushion
US2791289A (en) * 1952-12-10 1957-05-07 Simpson Timber Co Process of forming fissured fiber acoustical tile and product thereof
US2717538A (en) * 1953-01-15 1955-09-13 Armstrong Cork Co Method and apparatus for fissuring fibrous materials
US2874796A (en) * 1955-05-02 1959-02-24 Armstrong Cork Co Method of fabricating a sound-absorbing unit from cellulosic material

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159236A (en) * 1958-10-06 1964-12-01 Wood Conversion Co Manufacture of perforated acoustic boards
US3137364A (en) * 1958-10-06 1964-06-16 Wood Conversion Co Manufacture of perforated acoustic bodies
US3077945A (en) * 1959-08-07 1963-02-19 Wood Conversion Co Production of acoustic tile material and tile therefrom
US3202025A (en) * 1959-09-28 1965-08-24 Wood Conversion Co Tool for producing fissures in mineral felt
US3255843A (en) * 1959-10-02 1966-06-14 Owens Corning Fiberglass Corp Fibrous acoustical panel with continuously adhered surface film and method of making same
US3230813A (en) * 1960-10-10 1966-01-25 Wood Conversion Co Die and punch platen
US3202561A (en) * 1961-03-30 1965-08-24 Johns Manville Method for making acoustical tile with thermoplastic film covering
US3398811A (en) * 1961-08-28 1968-08-27 United States Gypsum Co Acoustical tile with vibratile membrane extending into fissures
US3261424A (en) * 1962-01-29 1966-07-19 Kaiser Gypsum Company Inc Cellulosic fibrous sheet having fissures which are free of nonfibrous and disintegrated fibrous material
US3167151A (en) * 1962-06-07 1965-01-26 Johns Manville Acoustical panel
US3143026A (en) * 1962-10-01 1964-08-04 Wood Conversion Co Tool for punching acoustic holes
US3325302A (en) * 1963-06-14 1967-06-13 Armstrong Cork Co Method for producing roller embossed warp-resistant fiberboard
US3470978A (en) * 1968-11-22 1969-10-07 Conwed Corp Punched acoustical board
US20190071868A1 (en) * 2017-09-01 2019-03-07 Industrial Technology Research Institute Sound absorbing material

Also Published As

Publication number Publication date
DE1303874C2 (de) 1974-01-24
US3013937A (en) 1961-12-19
BE568617A (xx) 1900-01-01
CH363784A (fr) 1962-08-15
US3013626A (en) 1961-12-19
DE1303874B (xx) 1973-07-05
GB851315A (en) 1960-10-12

Similar Documents

Publication Publication Date Title
US3017947A (en) Acoustical material and method of making the same
US20020006760A1 (en) Nonwoven fabric and method for making same
JPH028077B2 (xx)
US4495119A (en) Method for producing homogeneous batts of air-laid fibers
US2920373A (en) Manufacture of wadding
US3159236A (en) Manufacture of perforated acoustic boards
US2057167A (en) Manufacture of impregnated sheet products
US2363480A (en) Forming fibrous felts
CZ323194A3 (en) Process for producing articles from mineral fibers and apparatus for making the same
US2940891A (en) Method of producing endless fibre webs having irregular surfaces
US2057166A (en) Manufacture of sheeted fiberbinder products
US3137364A (en) Manufacture of perforated acoustic bodies
US4166877A (en) Non-woven fabric lightly fiber-entangled
US1344826A (en) Process of making lath or the like
US2717538A (en) Method and apparatus for fissuring fibrous materials
US2429314A (en) Apparatus for producing saturated fibrous bodies
US2686461A (en) Method of manufacturing acoustic fiberboard by perforating wet fiber mat
US1972810A (en) Asphalt prepared building material and method of making same
US3357847A (en) Method of treating the outer surface of softboard products
US2874796A (en) Method of fabricating a sound-absorbing unit from cellulosic material
US3573083A (en) Surface-layered felted fiber substrate and method of producing same
US2107304A (en) Process of impregnating fibrous materials
US3140331A (en) Manufacture of tile for acoustic and decorative effects
JPS5819449B2 (ja) 繊維補強セメント製屋根材の製造方法
JPH05200714A (ja) 無機質セメント板の製造方法