US3013626A - Acoustical material - Google Patents

Acoustical material Download PDF

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Publication number
US3013626A
US3013626A US66640657A US3013626A US 3013626 A US3013626 A US 3013626A US 66640657 A US66640657 A US 66640657A US 3013626 A US3013626 A US 3013626A
Authority
US
United States
Prior art keywords
tile
fibers
openings
acoustical
projections
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
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English (en)
Inventor
Milton G Brown
Robert C Philippi
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 US66640657 priority patent/US3013626A/en
Priority to US66640757 priority patent/US3017947A/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 US3013626A publication Critical patent/US3013626A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 rlates to an acoustical material and method 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.
  • Improvements in the sound-absorbent characteristics have been imparted to fibrous sheet material through two primary methods.
  • the one method is the drilling of holes in the face through substantially the entire depth of the material
  • thesecond 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 in 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 fis sured during the Wet forming process are the ones made from a slurry of mineral wool and/or glass wool and the like in which the fibers are present in clumps and are coated with a starch binder.
  • this newly formed slurry is screeded orsubjected to controlled pressure by a fissuring roll, as shown in United States Patent No.
  • 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 face of the sheet When the rough surface-is removed by a sanding or grinding operation, the face of the sheet is discontinuous with fissures disposed haphazardly thereover.
  • Another typeof 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 sufiicientinterstices between the intertwined fibers, it is essential that the fiber length be carefully controlled. If the percentage of short fibers istoo great, the sheet is toodense and will not be suitable as a soundabsorbing material.
  • This invention has been developed to provide a means whereby the conventional fiberboard type acoustical material, as well as previously dried mineral wool and glass wool material, 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 acoustical 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 offibrous material and dried to present irregularly shaped elongated openings on the surface.
  • FIGURE 1 shows a top plan view of a device suitable for carrying out one embodiment of the method of our invention
  • FIGURE 2 shows the acoustical tile formed on the device of FIGURE 1;
  • FIG. 3 is an enlarged cross-sectional view taken on the line IIIIII of FIG. 2.
  • FIGURE 1 there is shown a machine having a framework 2 on which are mounted a plurality of rotatable cylinders 3.
  • the device is equipped with six of the rotatable cylinders 3 positioned horizontally along the framework of the machine.
  • a roller conveyor 4 Immediately beneath the rotatable cylinders 3 is a roller conveyor 4.
  • This conveyor 4 may be driven or nondriven, depending on the requirements of the equipment.
  • the tiles are fed down a ramp onto the conveyor and the cylinders 3 engage the tile and move it through the machine.
  • the previously formed plates with the projections thereon are wrapped around the cylinders, presenting a surface which has irregularly shaped elongated projections 5 which engage the surface of the tile as it passes through the machine.
  • the projections 5 may be of any configuration; however, in the specific embodiment here shown, they are all disposed in a longitudinal direction with respect to the direction of travel of the tile passing through the device. This produces a tile having the irregularly shaped elongated openings in one direction. Any suitable means may be employed to drive the cylinders 3.
  • the design may be varied by turning the tiles at 90 during installation, giving an effect such as that shown in FIGURE 2 in which tile 7 has the irregularly shaped elongated openings running across the sheet and tile 8 has them running from top to bottom of the sheet. Such alternate turning results in a pleasing design effect.
  • the irregularly shaped elongated projections 5 on cylinders 3 and the pins 6 on cylinder 3 be blunt rather than sharp. These blunt portions engaging the surface 9 of the material first do not cut the surface but actually tear a portion of the surface 9 from its engagement with the surrounding surface and push it through to the bottom 10 of the opening 11 formed by the projections 5 or pins 6. As the projections 5 progress into the tile, they continue to push additional laminae 12 of the fibrous interior 4 13, compressing them in the bottom 10 of the opening 11.
  • the punching operation merely pushes the surface 9 of the board into the bottom 10 of the opening 11 and the surface remains exposed towards the exterior to give the desired appearance.
  • This punching operation also tears the fibers along the edges of the opening 11, thereby greatly enhancing the sound-absorbing properties of the board. This is somewhat different from the soundabsorbing properties which are acquired when the board is drilled in the conventional manner, in which the fibers are actually out.
  • the fibers are not necessarily cut but are merely pushed out of position, opening voids into the interior of the fiber board for the entrance of sound waves for absorption within the board.
  • the method can also be carried out by forming flat plates having the exact design desired on the finished acoustical tile, except that on the plate the areas which are to be indented in the tile will be in the form of raised projections.
  • This plate is placed in a punch press and the tiles are fed thereto so that the plate may be brought into engagement with the surface of the tile under sufficient pressure to force the projections into the tile, pushing the surface of the tile into the bottom of the openings and tearing the edge fibers, opening voids into the interior of the tile to enhance the sound-absorbing characteristics.
  • the fissuring roll exerts pressure on the top lamina and disrupts its continuity by cocking small areas of the surface, exposing fissures into the interior of the mass.
  • these fissures are present on the surface of the tile but do not extend down into the tile at an angle of with respect to the surface but instead are disposed at an angle other than 90.
  • the irregularly shaped elongated openings are not disposed at 90 with respect to the surface because the knives on the roll and the knives on the plate as they are brought directly into engagement with the tile in a downward direction are apt to undercut more on one side than on the other, with the result that the openings have the appearance of being disposed at an angle.
  • tile can be produced in which the openings are disposed at a greater angle with respect to the surface by producing a plate in which the knives producing the irregularly shaped elongated openings are disposed at an angle with respect to the surface of the plate. This plate is placed in the press in canted position so that on the downward stroke of the press, the projections on the plate are moving in a direction parallel to their axes.
  • the tile to be punched is placed on a support in the bottom of the press in canted position corresponding to angularity of the press platen. With this arrangement, the knives enter the surface of the tile at an angle and are withdrawn at the same angle.
  • An acoustical tile comprising an interior of interlaced vegetable fibers having, sound-absorbing interstices disposed therebetween, the front surface of said tile having a plurality of sound-absorbing openings communicating with the interstices in the body of said tile, said openings progressively increasing in cross-sectional area at least a portion of the way from the surface of said tile toward the interior of said tile, the major portion of the bottoms of said openings comprising portions of the front surface of the tile, and the walls of said openings comprising torn fiber lamina.

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)
US66640657 1957-06-18 1957-06-18 Acoustical material Expired - Lifetime US3013626A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE568617D BE568617A (enrdf_load_stackoverflow) 1957-06-18
US66640657 US3013626A (en) 1957-06-18 1957-06-18 Acoustical material
US66640757 US3017947A (en) 1957-06-18 1957-06-18 Acoustical material and method of making the same
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
US66640657 US3013626A (en) 1957-06-18 1957-06-18 Acoustical material
US66640757 US3017947A (en) 1957-06-18 1957-06-18 Acoustical material and method of making the same
US12390461 US3013937A (en) 1957-06-18 1961-07-13 Method of making acoustical material

Publications (1)

Publication Number Publication Date
US3013626A true US3013626A (en) 1961-12-19

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

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US66640757 Expired - Lifetime US3017947A (en) 1957-06-18 1957-06-18 Acoustical material and method of making the same
US12390461 Expired - Lifetime US3013937A (en) 1957-06-18 1961-07-13 Method of making acoustical material

Country Status (5)

Country Link
US (3) US3013626A (enrdf_load_stackoverflow)
BE (1) BE568617A (enrdf_load_stackoverflow)
CH (1) CH363784A (enrdf_load_stackoverflow)
DE (1) DE1303874C2 (enrdf_load_stackoverflow)
GB (1) GB851315A (enrdf_load_stackoverflow)

Cited By (20)

* 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
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
US3248834A (en) * 1963-10-29 1966-05-03 Polis Charles Simulated brick interior siding assembly
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
US3357847A (en) * 1963-12-13 1967-12-12 Flintkote Co Method of treating the outer surface of softboard products
US3470978A (en) * 1968-11-22 1969-10-07 Conwed Corp Punched acoustical board
US3726056A (en) * 1971-05-12 1973-04-10 Johns Manville Textural panel
US3771213A (en) * 1969-12-19 1973-11-13 Armstrong Cork Co Method of forming an embossed foil-covered ceiling panel
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
USD249895S (en) 1976-10-14 1978-10-10 Armstrong Cork Company Ceiling tile or similar article
USD259215S (en) 1978-11-09 1981-05-12 Conwed Corporation Ceiling panel or similar article
USD686350S1 (en) * 2011-09-28 2013-07-16 Ceramiche Atlas Concorde S.P.A. Surface pattern as applied to a tile
USD686352S1 (en) * 2011-09-28 2013-07-16 Ceramiche Atlas Concorde S.P.A. Surface pattern as applied to a tile
USD804060S1 (en) * 2015-08-21 2017-11-28 Kone Corporation Ceiling panel
USD907931S1 (en) * 2018-05-22 2021-01-19 Berry Global, Inc. Nonwoven fabric

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
US3398811A (en) * 1961-08-28 1968-08-27 United States Gypsum Co Acoustical tile with vibratile membrane extending into fissures
US3181279A (en) * 1962-01-29 1965-05-04 Kaiser Gypsum Company Inc Method and device for producing patterned-surface sheet material
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
US3422920A (en) * 1965-07-01 1969-01-21 Owens Corning Fiberglass Corp Acoustical panels
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
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
EP3324403B1 (en) * 2016-11-17 2019-06-12 Autoneum Management AG Automotive noise attenuating trim part with acoustically decoupling foam
TWI647113B (zh) * 2017-09-01 2019-01-11 財團法人工業技術研究院 吸音材料
US20230203805A1 (en) * 2021-12-27 2023-06-29 Calum W. Smeaton Apparatus with Interchangeable Panels for Varying Acoustic and Esthetic Treatments or Effects

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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
US1875074A (en) * 1927-08-05 1932-08-30 Masonite Corp Acoustical board
US1945003A (en) * 1931-03-26 1934-01-30 Johns Manville Surfacing of rigid shingles and the like
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
US2581993A (en) * 1943-09-17 1952-01-08 United States Gypsum Co Process of making acoustical tile
US2652126A (en) * 1949-12-24 1953-09-15 Mazer Jacob Sound-absorbing structure
US2667925A (en) * 1948-12-23 1954-02-02 Certain Teed Prod Corp Method of providing perforations in acoustical tiles
US2668123A (en) * 1948-09-25 1954-02-02 Certain Teed Prod Corp Method of producing acoustical tile
US2670500A (en) * 1950-08-08 1954-03-02 Glanzstoff Ag Process for the production of porous foils from viscose
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

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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
US2378618A (en) * 1941-12-19 1945-06-19 Celotex Corp Apparatus for perforating material
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
US2572470A (en) * 1949-09-15 1951-10-23 Allen Ind Grid and waffle design rug cushion

Patent Citations (14)

* 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
US1875074A (en) * 1927-08-05 1932-08-30 Masonite Corp Acoustical board
US1945003A (en) * 1931-03-26 1934-01-30 Johns Manville Surfacing of rigid shingles and the like
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
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
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
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 (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137364A (en) * 1958-10-06 1964-06-16 Wood Conversion Co Manufacture of perforated acoustic bodies
US3159236A (en) * 1958-10-06 1964-12-01 Wood Conversion Co Manufacture of perforated acoustic boards
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
US3202561A (en) * 1961-03-30 1965-08-24 Johns Manville Method for making acoustical tile with thermoplastic film covering
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
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
US3470978A (en) * 1968-11-22 1969-10-07 Conwed Corp Punched acoustical board
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
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
USD249895S (en) 1976-10-14 1978-10-10 Armstrong Cork Company Ceiling tile or similar article
USD259215S (en) 1978-11-09 1981-05-12 Conwed Corporation Ceiling panel or similar article
USD686350S1 (en) * 2011-09-28 2013-07-16 Ceramiche Atlas Concorde S.P.A. Surface pattern as applied to a tile
USD686352S1 (en) * 2011-09-28 2013-07-16 Ceramiche Atlas Concorde S.P.A. Surface pattern as applied to a tile
USD804060S1 (en) * 2015-08-21 2017-11-28 Kone Corporation Ceiling panel
USD907931S1 (en) * 2018-05-22 2021-01-19 Berry Global, Inc. Nonwoven fabric
USD907930S1 (en) * 2018-05-22 2021-01-19 Berry Global, Inc. Nonwoven fabric

Also Published As

Publication number Publication date
US3017947A (en) 1962-01-23
DE1303874B (enrdf_load_stackoverflow) 1973-07-05
CH363784A (fr) 1962-08-15
BE568617A (enrdf_load_stackoverflow) 1900-01-01
DE1303874C2 (de) 1974-01-24
GB851315A (en) 1960-10-12
US3013937A (en) 1961-12-19

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