DK178443B1 - Sound absorbing dry erase board - Google Patents

Sound absorbing dry erase board Download PDF

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Publication number
DK178443B1
DK178443B1 DK201400698A DKPA201400698A DK178443B1 DK 178443 B1 DK178443 B1 DK 178443B1 DK 201400698 A DK201400698 A DK 201400698A DK PA201400698 A DKPA201400698 A DK PA201400698A DK 178443 B1 DK178443 B1 DK 178443B1
Authority
DK
Denmark
Prior art keywords
surface side
sound
absorbing
hole plate
dry erase
Prior art date
Application number
DK201400698A
Other languages
Danish (da)
Inventor
Henrik Kaa Andersen
Original Assignee
Dampa Aps
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 Dampa Aps filed Critical Dampa Aps
Priority to DK201400698A priority Critical patent/DK178443B1/en
Priority to EP15194664.7A priority patent/EP3031614A1/en
Application granted granted Critical
Publication of DK178443B1 publication Critical patent/DK178443B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/008—Repeatedly-usable boards or tablets for writing or drawing with magnetic action
    • 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
    • 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
    • E04B2001/8495—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Drawing Aids And Blackboards (AREA)
  • Building Environments (AREA)

Abstract

The present invention relates to sound absorbing dry erase boards.

Description

Sound absorbing dry erase board
Technical field of the invention
The present invention relates to the field of dry erase boards.
Background of the invention
In building legislations regarding schools, kindergartens, and open offices there is often a demand for placing absorbers on the walls in order to get short reverberation times and less sound reflections. Often classrooms are built up against each other, which implies that the sound absorbers must to be placed on each side of the same wall. At the same time, there is often a demand for maximum air volume, and impact resistance.
The positioning of absorbers in the wall does not solve the problem in such rooms, since different types of display or teaching boards cover the walls.
US20140255903 discloses a writable erasable marker board comprising a strengthened glass sheet having a front surface and a back surface. The glass sheet exhibits a thickness of less than 2.0 mm, a shadow parallax to thickness ratio of less than 1 measured at a 60 degree incident light angle and for an index of refraction of 1.5, and a transmission haze of less than 50%. The writable erasable marker board is not particularly adapted for dampening of sound waves.
Hence, there is a need for a solution that overcomes the above problems. Summary of the invention
One aspect relates to a sound absorbing dry erase board comprising: - a first perforated plate with a plurality of holes, the perforated plate having a first surface side and a second surface side; wherein the first surface side is opposite to the second surface side; wherein the first surface side is coated or laminated with a cured polymer composition or with vitreous enamel that provides a virtually non-porous surface to which can be applied legible markings and writing which can be easily erased; and - a first layer of sound absorbing material facing the second surface side of the first perforated plate.
The advantage of this product is that it can be used directly as a wall panel or may be attached to a wall as an ordinary dry erase board. In both situations, the product will assist in reducing the reverberation times and sound reflections.
Disclosed herein is a sound absorbing dry erase board. The sound absorbing dry erase board comprises a first perforated plate with a plurality of holes. The perforated plate has a first surface side and a second surface side; and the first surface side is opposite to the second surface side. The perforations/holes span from the first to the second surface side.
The diameter and/or number and/or spacing of the holes/perforations in the perforated plate can be tuned or configured for various sound damping characteristics or applications.
In one or more embodiments, the holes are regularly spaced.
The first surface side is coated or laminated with a cured polymer composition or with vitreous enamel that provides a virtually non-porous surface to which can be applied legible markings and writing, which can be easily erased.
The sound absorbing dry erase board also comprises a first layer of sound absorbing material facing the second surface side of the first perforated plate.
The perforated plate may be made of different materials, such as aluminum or a ferromagnetic metal, such as steel.
The use of dry erase boards is a well-known method for writing information temporarily. Writings on a dry erase board are erasable by wiping lightly with felt, dry cloth or paper. Suitable dry erase surfaces generally include a cured polymer composition, such as a melamine, acrylic, vinyl chloride, polypropylene, polyethylene, polyethylene terephthalate, polystyrene, cellulose acetate, or polyurethane, coated to a backing plate. Alternatively, a vitreous enamel is coated on the backing plate. A polymeric film may also be laminated to the backing plate. If a laminate is used for producing the sound absorbing dry erase board of the present invention, the laminate must also be perforated such that the perforations/holes match the position of the perforations/holes in the perforated plate. Otherwise, the sound absorbing effect of the perforated plate will be limited. When using a coating composition, the perforations in the perforated plate will either remain open during the coating process, or if it is made from pre-coated material (coil coating), the perforation will take place after the coating.
This type of coating/laminate results in a surface that is hard, often white (but may also be of other colors), very smooth in appearance, and essentially non-porous. It is important for the coating or laminate to be essentially non-porous, as the non-permanent ink (non-bonding to the surface) may otherwise enter the porous structure in the surface, leaving visible remains, commonly termed “ghosting”.
The vitreous enamel coating consists of a layer of glass, which is thermally fused to the perforated metal plate, such as a perforated steel plate. In the enameling process, a ground coat consisting of a slip of the pulverized enamel constituents is applied to the perforated metal plate, and the ground-coated perforated metal plate is fired in an enameling furnace at an elevated temperature sufficient to effect the fusing of the ground coat. In order to effect the adherence of the ground coating to the perforated metal plate, adherence agents are included in the ground coat formulation. In general, oxides of nickel, cobalt, manganese, and others are used, as well as salts of these metals, which under the enameling conditions will form oxides. Cobalt oxides or cobalt salts convertible to the oxide under enameling conditions are especially effective adherence agents.
In conventional enameling operations, it is necessary to clean the perforated metal plate prior to applying the enamel. The cleaning generally consists of degreasing, pickling in acid, rinsing in a neutralizing bath, sometimes followed by a nickel solution dip to improve enameling behavior during firing, after which the articles are washed and dried.
After the application of the slip, the ground coat is fired at temperatures as high as 800-900 degrees Celsius. In conventional enameling operations the firing or burning of the enamel coating onto the perforated metal plate is carried out in a furnace in an oxidizing atmosphere.
The sound absorbing material may be of any suitable type, such as acoustic felt, mineral wool or mixtures thereof.
The holes must be of a certain size to allow the sound waves to enter, and at the same time be small enough to avoid that the pen will enter when writing on the dry erase board.
In one or more embodiments, the holes have a diameter within the range of 0.1-2 mm, e.g. within the range of 0.2-1.9 mm, such as within the range of 0.3-1.8 mm, e.g. within the range of 0.4-1.7 mm, such as within the range of 0.5-1.6 mm, e.g.
within the range of 0.6-1.5 mm, such as within the range of 0.7-1.4 mm, e.g.
within the range of 0.8-1.3 mm, such as within the range of 0.9-1.2 mm, e.g.
within the range of 1.0-1.1 mm.
Preferably, the holes have a diameter within the range of 0.3 mm-1.5 mm.
In one or more embodiments, the sound absorbing dry erase board further comprises a layer of filler material facing the layer of sound absorbing material.
Preferably, the filler material also has a sound absorbing effect, such as mineral wool.
In one or more embodiments, the filler material is a heat insulating material, such as mineral wool.
In one or more embodiments, the sound absorbing dry erase board further comprises a second perforated plate with a plurality of holes, such as regularly spaced holes. The second perforated plate has a first surface side and a second surface side; and the first surface side is opposite to the second surface side.
The first surface side is coated/laminated with a cured polymer composition or with vitreous enamel that provides a virtually non-porous surface to which can be applied legible markings and writing, which can be easily erased. The second surface side of the second perforated plate is facing the second surface side of the first perforated plate. This embodiment is especially suitable as a multifunctional dry erase board (multifunctional wall panel) used e.g. to separate two classrooms.
In one or more embodiments, the sound absorbing dry erase board further comprises a second perforated plate with a plurality of holes, such as regularly spaced holes, the second perforated plate having a first surface side and a second surface side; wherein the first surface side is opposite to the second surface side; wherein the first surface side is coated with a cured polymer composition or with vitreous enamel that provides a virtually non-porous surface to which can be applied legible markings and writing which can be easily erased; wherein the second surface side of the second perforated plate is facing the second surface side of the first perforated plate, and wherein a second layer of sound absorbing material is positioned in-between the layer of filler material and the second perforated plate.
It may be an advantage if the sound absorbing dry erase board can function as a display wall. Hence, in one or more embodiments, the first and/or second perforated plate is of a ferromagnetic material.
In one or more embodiments, the cured polymer composition comprises polymers selected from the group consisting of polyesters, epoxies, urethanes, acrylates, and mixtures thereof.
In one or more embodiments, the dry erase board further comprises a frame structure and two or more wheels for ease of movement of the dry erase board. The dry erase board is attached to the frame structure, and the wheels are attached directly to the frame structure or may be attached to a rod or a similar device welded onto or attached to the frame structure.
In one or more embodiments, the dry erase board further comprises a frame structure and means for attachment onto a table, such as an office or school table. Sound may thereby be absorbed and insulated from the occupant of the table, while at the same time be used for dry erase notes and drawings, as well as a magnetic notice board.
Another aspect of the present invention relates to a performance table, such as a school table, comprising a desktop comprising a sound absorbing dry erase board according to the present invention.
Brief description of the figures
Figure 1 shows a wall mounted sound absorbing dry erase board in accordance with various embodiments of the invention;
Figure 2 shows a desktop mounted sound absorbing dry erase board in accordance with various embodiments of the invention; and
Figure 3 shows a movable, freestanding sound absorbing dry erase board in accordance with various embodiments of the invention.
Detailed description of the invention
In the following, the principle of production is exemplified with three different products according to the invention.
Production of a wall hung sound absorbing dry erase board (multifunctional wall panel)
This product is useful in for example class rooms or meeting rooms, where the rooms walls can then be used both for improving acoustics while at the same time allowing for additional surfaces to be used for writing boards and as magnetic board for attaching notes and pictures etc.
A coil of steel, pre-coated with a cured polymer composition according to the present invention, is first perforated in a coil-to-coil perforation press. The perforated coil is then cleaned from grease originating from the perforation process, also in a coil-to-coil process. Thereafter, in a coil-to-coil process, a sound absorbing felt is applied (by using glue) onto the non-coated side of the steel. The coated, perforated steel with backside felt is then cut and bent into the desired shape of a wall panel, leaving a 2-10 cm deep enclosure/space behind the backside felt. Finally, the enclosure is filled with mineral wool. A frame may be added to the wall hung dry erase board for decorative or practical purposes. The final product is shown in Figure 1.
Production of a movable, freestanding sound absorbing dry erase board This product is useful in for example class rooms and office spaces, enabling both improved acoustics for the occupants, while at the same time allowing for more surface space to write notes and presentations or by using magnets, attach drawings, pictures or notes.
The production process is the same as describe above for the wall hung dry erase board, but here, a second panel (made from the coated, perforated steel with backside felt) is mounted with the backside felt facing the mineral wool, and enclosed by a frame around the two panels. Finally, a stand or wheels are mounted on the frame for stable floor placement or easy movement.
The final product is shown in Figure 3.
Production of a desk-mounted dry erase board
This product is useful for allowing better acoustics for the desk occupants while at the same time allowing surface space to write notes or by using magnets, attach drawings, pictures or notes.
The production process is the same as describe above for the freestanding and movable dry erase board. The size of the dry erase board panel is of a size as to fit on to the side of a work desk or school table, and instead of a stand or wheels, fastening means, such as a clamp, is mounted underneath the frame to fasten the panel onto the desk.
The final product is shown in Figure 2.

Claims (7)

1. Lydabsorberende whiteboard omfattende: - en første hulplade med en flerhed af huller, hulpladen har en første overfladeside og en anden overfladeside, hvor den første overfladeside er overfor den anden overfladeside, og hvor den første overfladeside er overtrukket eller lamineret med en hærdet polymersammensætning eller med glasemalje, der giver en næsten ikke-porøs overflade, på hvilken der kan påføres læselige tegninger og skrift, som nemt kan slettes; og - et første lag af lydabsorberende materiale der vender ind mod den anden overfladeside af den første hulplade.A sound-absorbing whiteboard comprising: - a first hole plate having a plurality of holes, the hole plate having a first surface side and a second surface side, the first surface side facing the second surface side and the first surface side being coated or laminated with a cured polymer composition or with glass enamel providing an almost non-porous surface on which readable drawings and writing can be applied which can be easily erased; and - a first layer of sound-absorbing material facing the second surface side of the first hole plate. 2. Et lydabsorberende whiteboard ifølge krav 1, som endvidere omfatter en anden hulplade med en flerhed af huller, den anden hulplade har en første overfladeside og en anden overfladeside, hvor den første overfladeside er overfor den anden overfladeside, og hvor den første overfladeside er overtrukket eller lamineret med en hærdet polymersammensætning eller med glasemalje, der giver en næsten ikke-porøs overflade, på hvilken der kan påføres læselige markeringer og skrift, som nemt kan slettes; hvor den anden overfladeside af den anden hulplade vender ind mod den anden overflade af den første hulplade.A sound-absorbing whiteboard according to claim 1, further comprising a second hole plate having a plurality of holes, the second hole plate having a first surface side and a second surface side, the first surface side facing the second surface side and the first surface side being coated. or laminated with a cured polymer composition or with glass enamel providing an almost non-porous surface onto which readable markings and writing can be easily erased; wherein the second surface side of the second hole plate faces the second surface of the first hole plate. 3. Et lydabsorberende whiteboard ifølge ethvert af kravene 1-2, hvor hullerne har en diameter på mellem 0,1 og 2 mm.A sound-absorbing whiteboard according to any one of claims 1-2, wherein the holes have a diameter of between 0.1 and 2 mm. 4. Et lydabsorberende whiteboard ifølge ethvert af kravene 1-3, hvor den første og/eller anden hulplade er af et ferromagnetisk materiale.A sound-absorbing whiteboard according to any one of claims 1-3, wherein the first and / or second hole plate is of a ferromagnetic material. 5. Et lydabsorberende whiteboard ifølge ethvert af kravene 1-4, hvor den hærdede polymersammensætning omfatter polymer udvalgt fra gruppen bestående af polyestere, epoxyer, urethaner, akrylater og blandinger deraf.A sound-absorbing whiteboard according to any one of claims 1-4, wherein the cured polymer composition comprises polymer selected from the group consisting of polyesters, epoxies, urethanes, acrylates and mixtures thereof. 6. Et lydabsorberende whiteboard ifølge ethvert af kravene 1-5, som endvidere omfatter en rammekonstruktion og en fod eller to eller flere hjul, som gør det nemmere at flytte whiteboardet; hvor whiteboardet er fastgjort på rammekonstruktionen, og hvor foden eller hjulene er fastgjort direkte på rammekonstruktionen eller kan fastgøres på en stang eller en lignende anordning svejset på eller fastgjort til rammekonstruktionen.A sound-absorbing whiteboard according to any one of claims 1-5, further comprising a frame structure and a foot or two or more wheels, which makes it easier to move the whiteboard; wherein the whiteboard is attached to the frame structure and the foot or wheels are fixed directly to the frame structure or may be attached to a rod or similar device welded to or attached to the frame structure. 7. Et funktionsbord, såsom et skolebord, omfattende et skrivebord påmonteret et lydabsorberende whiteboard ifølge ethvert af kravene 1-5.A function table, such as a school desk, comprising a desk mounted on a sound-absorbing whiteboard according to any one of claims 1-5.
DK201400698A 2014-12-01 2014-12-01 Sound absorbing dry erase board DK178443B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK201400698A DK178443B1 (en) 2014-12-01 2014-12-01 Sound absorbing dry erase board
EP15194664.7A EP3031614A1 (en) 2014-12-01 2015-11-16 Sound absorbing dry erase board

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK201400698A DK178443B1 (en) 2014-12-01 2014-12-01 Sound absorbing dry erase board
DK201400698 2014-12-01

Publications (1)

Publication Number Publication Date
DK178443B1 true DK178443B1 (en) 2016-02-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
DK201400698A DK178443B1 (en) 2014-12-01 2014-12-01 Sound absorbing dry erase board

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EP (1) EP3031614A1 (en)
DK (1) DK178443B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB836390A (en) * 1957-04-03 1960-06-01 Vitreous Enamelling Corp Propr Method of flattening and sound insulating vitreous enamelled chalkboards, architectural panels and the like
EP0958943A1 (en) * 1998-05-14 1999-11-24 Walter Hebel GmbH & Co Panel with curved surface
US20100099073A1 (en) * 2008-10-22 2010-04-22 Howard Michele L Combination chalkboard and corkboard
US20140255903A1 (en) * 2012-11-30 2014-09-11 Corning Incorporated Durable glass articles for use as writable erasable marker boards

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6617002B2 (en) * 1998-07-24 2003-09-09 Minnesota Mining And Manufacturing Company Microperforated polymeric film for sound absorption and sound absorber using same
US20050186439A1 (en) * 2002-02-28 2005-08-25 Bert Staadecker Dry erase board for magnets
US20080029336A1 (en) * 2006-06-10 2008-02-07 Patrick Sigler Acoustic panel
DE102007044875A1 (en) * 2007-09-20 2009-04-02 VS Vereinigte Spezialmöbelfabriken GmbH & Co. KG Plate-shaped component
US8132602B2 (en) * 2007-11-07 2012-03-13 Tequipment, Inc. Interactive board cover
JP5936552B2 (en) * 2010-01-26 2016-06-22 スリーエム イノベイティブ プロパティズ カンパニー Low ghost generation dry erase article and use thereof
US9194124B2 (en) * 2011-12-09 2015-11-24 3M Innovative Properties Company Acoustic light panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB836390A (en) * 1957-04-03 1960-06-01 Vitreous Enamelling Corp Propr Method of flattening and sound insulating vitreous enamelled chalkboards, architectural panels and the like
EP0958943A1 (en) * 1998-05-14 1999-11-24 Walter Hebel GmbH & Co Panel with curved surface
US20100099073A1 (en) * 2008-10-22 2010-04-22 Howard Michele L Combination chalkboard and corkboard
US20140255903A1 (en) * 2012-11-30 2014-09-11 Corning Incorporated Durable glass articles for use as writable erasable marker boards

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Publication number Publication date
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