JP2001236059A - Drum head structure - Google Patents

Abstract

(57) [Summary] To provide a drum head laminate. SOLUTION: This drum head laminate (10) includes upper and lower layers (12, 14) made of a synthetic plastic sheet material,
And a fabric sheet material layer (16) made of impregnated polyester or natural fibers sandwiched between these synthetic plastic layers. The material, typically liquid or resin, used to impregnate the fabric, causes the fabric to cure and stiffen, causing the fabric to vibrate when the drumhead is hit with a drumstick or similar hard object. Enable cooperative vibration with the plastic layer. The layers are bonded together using a laminating adhesive. An epoxy or similar material is applied as a protective coating to the upper and lower exposed surfaces of the drumhead.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates generally to the area of drumstick or drumhead structures, and more particularly, to at least two layers of synthetic plastic sheet material,
And a laminate which is completely impregnated with a liquid chemical and vibrates when the object is hit with an object.
The invention relates to a laminating head for a drum comprising a single layer of fabric material made of polyester fibers or natural fibers bonded between plastic sheet materials so as to be able to perform the operation.

[0002]

2. Description of the Prior Art Drum heads made from various materials are well known in the prior art. The first material used to make the drumhead was animal leather. Later, synthetic materials were selected for most heads, especially for drums used for the performance of rock, jazz, and almost all types of modern music.

[0003] In contrast, animal hides have been used to play folk music since ancient times. Examples of drums used for playing folk music include conga, bongo, and djimbe. Natural leather has often been preferred over synthetic materials. This is because the tone of the sound generated by natural leather is warm. When an object strikes the head, a fundamental tone is generated, usually with minimal overtones. These overtones are described as incidental high notes that are heard with the fundamental and have a vibration frequency that is a multiple of the frequency of the fundamental. The effect of overtone generation is that it can significantly disturb the sound and reduce its quality. For heads made from natural animal leather, the sound decay is relatively short (eg, 500-600 ms).
Therefore, each sound of the composition can be clearly output.

[0004] In contrast, synthetic materials, especially plastics, which have often been used in place of animal leather, often "pingy" when the drumhead is hit. Produces a sound described as The emitted sound differs from the sound produced by heads made of animal leather and contains many dissonant harmonics. Residual high pitch sound heard after hitting the head (generally,
ter ring) is also a problem with heads made from synthetic materials. Reverberation occurs when the primary and secondary sounds decay over time and mix. The result is typically an unclear and unpleasant music sound. Despite these problems, synthetic heads have distinct advantages over natural leather. These benefits include the strength of the material itself, the ability to withstand the negative effects of humidity and temperature caused by climate change. Leather can be very dry or brittle. If the humidity in the air is too high, the leather gets wet and eventually loses its tautness. In either case, it becomes increasingly difficult to maintain the desired sound consistently, and the quality of the music is compromised.

[0005] The present invention addresses these problems of the prior art.
The solution is to laminate the plastic with an impregnated synthetic or natural object. This is synergy (syn)
ergy) combines the best features of a natural leather head with a warmer sound and less overtones and the advantages of synthetic materials including resistance to changes in humidity and temperature.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a laminated drumhead for a drum or similar musical instrument which includes an upper and lower plastic layer and an impregnated cloth layer sandwiched and bonded between these two plastic layers. It is to provide.

It is another object of the present invention to provide a fabric material bonded between individual plastic material layers so that the impregnating material stiffens the fabric as it cures so that the fabric and the plastic material can co-vibrate. It is to provide a laminated drumhead for a drum or similar musical instrument that uses a liquid or resin for impregnation.

It is yet another object of the present invention to provide a laminated drumhead for a drum or similar musical instrument having means for mitigating the high frequency dissonance inherent in plastic drumheads while retaining the desired break in sound. To provide.

Another object of the present invention is to provide a laminated drumhead for a drum or similar musical instrument having means for retaining the strength of the plastic laminated drumhead and eliminating the inherent undesirable plastic sound. is there.

It is still another object of the present invention to produce a drumhead made from natural animal leather, comprising upper and lower plastic layers and a single impregnated fabric layer sandwiched between the layers. It is an object of the present invention to provide a laminated drumhead for a drum or similar musical instrument that produces a sound that is similar, if not identical, to the sound.

Yet another object of the present invention is to have the appearance and feel of a drumhead made from natural animal leather.
It is to provide a laminated drumhead for a drum or similar musical instrument.

Yet another object of the present invention is to provide a laminated drumhead for a drum or similar musical instrument that can be easily and efficiently manufactured.

[0013]

SUMMARY OF THE INVENTION The present invention comprises a layer of synthetic plastic sheet material above and below and a single layer of fabric sheet material made of impregnated polyester or natural fibers sandwiched between these two plastic layers. A laminate is provided. The material used to impregnate the object, typically a liquid or resin, cures and stiffens the fabric so that the fabric can cooperate and vibrate with the vibrating synthetic plastic layers on either side. I do.

A preferred laminate of the present invention provides a laminate comprising a layer of synthetic plastic sheet material above and below and a layer of impregnated polyester or natural fabric sheet material sandwiched between these synthetic plastic layers.
A laminating adhesive is used to bond the layers together. Typically, an epoxy or similar material is applied as a protective coating to the upper and lower exposed surfaces of the drumhead.

Modifications of the present invention include a preferred embodiment of the present invention as part of the core or as a common component disposed within the laminate. These other embodiments include several plastic sheet material layers and impregnated fabric sheet material layers in various combinations. For example, one such embodiment includes a combination of materials in the following order (top to bottom). That is, a combination of plastic, cloth, plastic, plastic, and cloth is included. Another embodiment includes the following sequence (from top to bottom) of the laminated material.
That is, a combination of plastic, cloth, plastic, plastic, cloth, and plastic is included. The materials used to impregnate the fabric can be varied according to preferred embodiments and variations. The alternative sheet materials are joined together in the same manner as the materials are joined in the preferred embodiment laminate. Protective coating,
It is applied to the exposed surface of the laminate of the modified example.

The preferred embodiment and various variations of the present invention generally correlate with the type of drum for using a particular drumhead. For example, conga, bongo, and dezimbe typically use drumhead stacks of different thicknesses to obtain different sounds. In general, the thickness of the drumhead is determined by the number of plastic and fabric layers that make up the laminate in combination, but the same result can be obtained by reducing the number and increasing the thickness of each individual layer. .

Other objects and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention shown in FIGS. 1 and 2 is a drum made of a laminate comprising synthetic plastic sheet materials 12 and 14 bonded to a single synthetic or natural cloth material 16. A head structure 10 is provided. Fabric material 16 may be a woven or non-woven material, depending on its composition, and is typically "sandwiched" between layers of synthetic plastic sheet materials 12 and 14. The synthetic plastic sheet materials 12 and 14 are:
A resin formulation 19 is used to adhere to each side of the fabric.
The resin formulation is ethyl vinyl acetate ("EVA")
Or any other suitable adhesive or the like used for this purpose. The cloth material 16 can be impregnated with several different substances 20. These materials include, but are not limited to, sodium silicate, starch, and epoxy resins. The individual thicknesses of the synthetic or natural sheet materials that make up the laminate can vary. The estimated thickness range of the plastic sheet material is 0.0762 mm
3 to 20 mils. The estimated thickness range of the fabric sheet material is from 2 to 30 mils (0.0508 to 0.762 mm). 100
% Solid epoxy, two components 13 and 15
As a protective coating, it is applied to the exposed surfaces of the upper and lower layers made of synthetic sheet material.

In practicing the present invention, various synthetic plastic sheet materials can be used. These materials include, but are not limited to, Mylar (MYLAR is a registered trademark of EI DuPont). Preferred mylars are heat shrinkable films. Other synthetic plastic sheet materials may be used, such as Melinex manufactured by ICI America (MELINEX is a registered trademark), Serenel manufactured by Serenese Plastics, Inc. (CELENAR is a registered trademark), and Scotchpar manufactured by 3M (SCOTCHPAR is a registered trademark). In practicing the present invention, it is preferred to use a suitable synthetic cloth material with random fiber orientation. Such textile materials include Typel ((TYPELLE is a registered trademark)) (Model 5300), Kevlar ((KEVLAR) is a registered trademark), Tyvek ((TYVEK) is a registered trademark), and Monex (( MONEX) is a registered trademark). All of these materials are E.I. I. It is a product of DuPont. Suitable natural cloth materials are warm and natural ((WAR
(M & Natural is a registered trademark), and a cotton batting sold under the trademarks White ((WHITE) is a trademark).

A variation, including the embodiment shown in FIG. 3, is a sheet of impregnated synthetic cloth material 22 adhered to the top surface 24a of a sheet of plastic material 24, and
And a second plastic material 28 that sandwiches the cloth material 26 between the plastic material 24 and the plastic material 28. It is adhered to the lower surface 26a. An adhesive formulation 29 such as EVA is used to adhere and bond these layers together.

Another variation is one or more of a synthetic plastic sheet material layer and a cloth sheet material disposed above and / or below the laminate that constitutes a preferred embodiment of the present invention, as described below. At least one impregnated fabric material 16 comprising a drumhead laminate comprising further bonded layers.
Is sandwiched between the two synthetic plastic sheet material layers 12 and 14. Thus, additional variants of the present invention include: 1. Thin Skin Congahead (Top) Layer 1: 0.1905 mm (7.5 mil) Mylar Layer 2: Sodium Silicate Impregnated Fabric Layer 3: 0.1905 mm (7.5 mil) Mylar Layer 4: Sodium Silicate 1. Impregnated cloth layer 5: 0.1905 mm (7.5 mil) mylar Intermediate Conga Head (top) Layer 1: 0.1905 mm (7.5 mil) Mylar Layer 2: Sodium silicate impregnated cloth Layer 3: 0.1905 mm (7.5 mil) Mylar Layer 4: 0.0. 1905 mm (7.5 mil) Mylar layer 5: cloth impregnated with sodium silicate Layer 6: 0.1905 mm (7.5 mil) Mylar Thick Leather Congahead (Top) Layer 1: 0.1905 mm (7.5 mil) Mylar Layer 2: Sodium Silicate Impregnated Cloth Layer 3: 0.1905 mm (7.5 mil) Mylar Layer 4: 0.0. 3. 1905 mm (7.5 mil) mylar layer 5: cloth impregnated with sodium silicate layer 6: 0.1905 mm (7.5 mil) mylar layer 7: Tyvek 4. Thin Skin Bongo Head (Top) Layer 1: 0.1905 mm (7.5 mil) Mylar Layer 2: Sodium silicate impregnated cloth Layer 3: 0.1905 mm (7.5 mil) Mylar Thick Leather Bongo Head (Upper) Layer 1: Tyvek Layer 2: 0.1905 mm (7.5 mil) Mylar Layer 3: Sodium Silicate Impregnated Cloth Layer 4: 0.1905 mm (7.5 mil) Mylar Lamination EVA or other suitable adhesive is suitably applied to one or both sides of the plastic and fabric sheet materials to bond the body layers together. In all embodiments, the fabric thickness is typically between 0.0508 mm and 1.016 mm (2 mils to 40 mils), but can be varied.

As in the preferred embodiment of the present invention, the thickness range of the synthetic plastic sheet material and the fabric sheet material used to form the variant is 0.0762 mm to 0.508 mm (3 mm) for plastic. Mils to 20 mils) and 0.0508 mm for cloth
To 1.016 mm (2 to 40 mils). Adhesive formulations and impregnants can also vary depending on various factors, including but not limited to timbre, feel, appearance, and other unique requirements of the particular drumhead construction. Further, an epoxy protective coating is usually applied.

In practice, the drumhead structure of the preferred embodiment of the present invention is made up of a laminate comprising three layers of one synthetic or natural fabric material 16 and two synthetic plastic materials 12 and 14. I have. First, the cloth layer is 0.05
It has a thickness of 2 to 40 mils and is impregnated with a specific chemical such as sodium silicate, starch, or epoxy resin. These chemicals are applied to the fabric using any conventional application method, such as smearing with a roller or acting on the fabric. In the process, a cloth that has a fluffy appearance in the non-impregnated state absorbs the impregnating agent, eventually matting and compacting.

The thickness of each sheet of plastic material is typically 7.5 mils (0.1905 mm). EVA can be used as a pre-coated binder to adhere these layers together. The outer or exposed surface of the plastic is sanded or "roughened", giving the head the appearance and feel of natural or real animal leather. The epoxy is then applied as a protective coating to the exposed surface of the laminate and cured. When the structure is attached to the hoop 30, the appearance is almost similar to that of real animal leather, giving the head an exotic taste that is faithfully replicated in kind.

The drum head laminate of the present invention generally acts to mitigate the high frequency tone characteristic of a plastic drum head. The present invention contributes to the unique sound quality and assists in maintaining the sound cut without excessively attenuating the sound in the process. By means of an impregnated cloth that cures to a rigid state, and by laminating the cloth to a plastic sheet material, the present invention cooperates to provide a more natural looking and sounding drumhead.

Depending on the overall structure of the laminate and the specific composition of its components, for example, the number of individual layers of material, synthetic or natural, the ratio of plastic sheet material to cloth, the relative proportion of the various sheets of synthetic or natural Depending on the thickness and the composition of the impregnating, adhesive and protective coatings, the drumhead of the present invention can take on a variety of appearances, produce a unique and pleasing broad spectrum and a variety of sounds .

While the present invention has been described in connection with a particular preferred embodiment, it will be understood that it is not intended to limit the invention to that particular embodiment. Rather, the intention is to cover all modifications, variations, and equivalents included within the spirit and scope of the invention as defined by the appended claims.

[Brief description of the drawings]

FIG. 1 shows a preferred embodiment of the present invention, including upper and lower surfaces made of synthetic plastic sheet material, and an impregnated intermediate layer of synthetic or natural fabric sheet material adhered to the synthetic plastic sheet material, attached to each other. It is a perspective view showing a lamination head.

FIG. 2 is a laminated head of a preferred embodiment of the present invention showing a synthetic or natural impregnated fabric material layer laminated between upper and lower synthetic plastic sheet material layers using an adhesive resin formulation to adhere the layers to one another. FIG.

FIG. 3 Laminates a synthetic or natural impregnated fabric material layer laminated between upper and lower synthetic plastic sheet material layers, and an upper layer made of synthetic plastic sheet material, using an adhesive resin formulation to adhere the layers to each other. Synthetic or natural secondary
It is sectional drawing of the modification of this invention which shows an impregnated cloth material layer.

[Explanation of symbols]

 Reference Signs List 10 drum head structure 12, 14 synthetic plastic sheet material 16 cloth material 30 hoop

Continued on the front page (71) Applicant 595028731 12804 Rayer Street, North Hollywood, Cali fornia 91605, United States of America (72) Inventor Gerrard Jose Rays 91355, Valencia, Industrie, Valencia, California, USA

Claims (14)

[Claims] 1. A head for a drum or similar musical instrument, comprising: a first synthetic plastic sheet material having an exposed surface; a second synthetic plastic sheet material having an exposed surface; and between the first and second synthetic plastic sheet materials. A sheet of fabric material bonded to these materials, and the fabric material is cured and stiffened, whereby the first and second heads are hit when the head is hit with a drumstick or similar hard object. A means used to impregnate said sheet of fabric material so that it can co-vibrate with said synthetic plastic sheet material. 2. The head of claim 1, wherein said means for impregnation comprises sodium silicate. 3. The head according to claim 1, wherein said means for impregnation comprises an epoxy resin. 4. The head according to claim 1, wherein said means for impregnation comprises starch. 5. The head of claim 1, wherein the fabric sheet material is synthetic. 6. The head of claim 1, wherein the fabric sheet material is natural. 7. The head according to claim 1, wherein the cloth sheet material is a woven cloth. 8. The head according to claim 1, wherein the cloth sheet material is a non-woven fabric. 9. The head of claim 1, wherein the first and second synthetic plastic sheet materials and the cloth sheet material are adhesively bonded to one another. 10. The head of claim 1, wherein epoxy is applied as a protective coating to the exposed surface of the drum head. 11. A head for a drum or similar musical instrument, wherein a first sheet of synthetic plastic material, a second sheet of synthetic plastic material, are arranged between and between the first and second sheets of synthetic plastic material. First made of cloth material bonded to the sheet
A sheet, a third sheet of synthetic plastic material joined to the second sheet of synthetic plastic material, a second sheet of cloth material joined to the third sheet of synthetic plastic material, and the first and second cloths The sheet of material is hardened and made rigid so that it can co-vibrate with the first, second and third sheets of synthetic plastic material when the head is hit with a drumstick or similar hard object. And a means for impregnating said first and second sheets of fabric material. 12. A head for a drum or similar musical instrument, comprising: a first sheet of synthetic plastic material; a second sheet of synthetic plastic material; and disposed between and between the first and second sheets of synthetic plastic material. First made of cloth material bonded to the sheet
A third sheet of synthetic plastic material joined to the second sheet of synthetic plastic material; a second sheet of cloth material joined to the third sheet of synthetic plastic material; joined to the second cloth material sheet The fourth sheet of synthetic plastic material and the sheet of cloth material are hardened and rigid, whereby the first, second and third sheets are hit when the head is hit with a drumstick or similar hard object. And a means used to impregnate said first and second sheets of fabric material so as to co-vibrate with the fourth sheet of synthetic plastic material. 13. A head for a drum or similar musical instrument, comprising: a first sheet of synthetic plastic material, a second sheet of synthetic plastic material, disposed between and between the first and second sheets of synthetic plastic material. First made of cloth material bonded to the sheet
A third sheet of synthetic plastic material joined to the second sheet of synthetic plastic material; a second sheet of cloth material joined to the third sheet of synthetic plastic material; joined to the second cloth material sheet A fourth sheet of synthetic plastic material, a third sheet of cloth material joined to the fourth sheet of synthetic plastic material, and the sheet of cloth material being cured and rigid, whereby the head is a drumstick or The first, second, and third cloth materials are configured to co-vibrate with the first, second, third, and fourth synthetic plastic material sheets when hit with a similar hard object. A head comprising the means used to impregnate the sheet. 14. A head for a drum or similar musical instrument, comprising a first sheet of synthetic plastic material having a top surface, a second sheet of synthetic plastic material, and disposed between the first and second sheets of synthetic plastic material. And a first cloth material bonded to these sheets.
A sheet, a second sheet of fabric material bonded to the upper surface of the first sheet of synthetic plastic material, and the first and second sheets of fabric material are cured and rigid, whereby:
Impregnating the first and second sheets of fabric material such that the head cooperates with the first and second sheets of synthetic plastic material when the head is hit with a drumstick or similar hard object. Including the means used to
head.