GB1568736A - Wall panel for ball games - Google Patents

Wall panel for ball games Download PDF

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Publication number
GB1568736A
GB1568736A GB43097/77A GB4309777A GB1568736A GB 1568736 A GB1568736 A GB 1568736A GB 43097/77 A GB43097/77 A GB 43097/77A GB 4309777 A GB4309777 A GB 4309777A GB 1568736 A GB1568736 A GB 1568736A
Authority
GB
United Kingdom
Prior art keywords
wall panel
laminate
thickness
central body
wall
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
Application number
GB43097/77A
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.)
BOXHOLMS AB
Original Assignee
BOXHOLMS AB
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 BOXHOLMS AB filed Critical BOXHOLMS AB
Priority to GB43097/77A priority Critical patent/GB1568736A/en
Publication of GB1568736A publication Critical patent/GB1568736A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
    • E04C2/246—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20 combinations of materials fully covered by E04C2/16 and E04C2/20
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2607/00—Walls, panels

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Finishing Walls (AREA)

Description

(54) WALL PANEL FOR BALL GAMES (71) We, BOXHOLMS AB, a Swedish corporation, of Fack, Boxholm, Sweden, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a wall panel for forming a wall for use in a ball game in which a ball is caused to strike the wall built up of such panels.
Such a ball game is squash in which the ball is caused to rebound from the walls of a squash-court.
Conventionally such walls are often built of concrete. However, it has been observed that partial cavitations can arise in this material, especially at cracks in the concrete, due to the repeated rebounds of the ball against the walls.
It is also known to utilize plywood for such walls, in which case, however, the sound created by the ball striking the walls has been extremely high.
It is further known for such panels to use particle board provided with a plastics laminate glued to the board. There problems have arisen when connecting the panels to each other to form a whole wall and also risks for delamination have been noticed.
According to the present invention there is provided a wall panel for forming a wall for use in a ball game in which a ball is caused to strike the wall, comprising a central body consisting of, or substantially of, a particle board and on each side thereof a thermosetting plastics laminate glued to a face of a hardboard glued to the central body with the hardboard between the plastics laminate and the central body, the plastics laminate having been first glued to the hardboard and the hardboard then having been glued to the central body.
Some embodiments of the invention will now be described, by way of examples, with reference to the accompanying drawing, in which: Figure 1 is a perspective view of two walls of a court built up with panels according to the invention, and Figures 2 to 4 are three different embodiments of wall panels according to the invention and shown as cross sections taken along line A-A in Figure 1.
With reference to Figure 2, 1 is a thermosetting plastics laminate, which in thickness is 0.2 to 1.5 mm, preferably 0.6 to 1.0 mm. This laminate 1 is glued to a hardboard (a wood fibre board) 2, which in thickness is 2 to 5 mm, preferably 3 mm.
The compound material consisting of the plastics laminate 1 and the hardboard 2 is then by means of an ordinary wood cement glued to both sides of a particle board central body 3. In Figure 2 the particle board 3 is cut into strips with the width T, which strips stand on edge in the panel and form its body.
Such an embodiment is used when it is desirable to attain a greater security against delamination or when the dimension T is not obtainable with the ordinary particle board thicknesses. The dimension T can vary between 12 and 60 mm, generally between 25 and 40 mm. The large T-dimensions are used when it is desirable to have a more sound absorbing wall.
Surrounding the particle board body 3 and glued to it is a frame 4 of solid wood, preferably redwood or whitewood. This reinforces the edges of the panels and decreases the risks for delamination due to creep pressures in the laminate. Grooves 7 are provided in the outer edges of the frame 4 for the connection of adjacent panels to each other by means of a loose tongue 5. This gives the best guarantee that the abutting panels will have a smooth joint. The tongue 5 can be made of wood, wood fibre, laminate or plastics.
In Figure 3, a panel body is disclosed consisting of a particle board 3' placed in the plane of the panel, in which case the thickness of the board is the thickness of the body, thus constituting the dimension T. The body is here, as in the embodiment according to Figure 2, surrounded by a frame 4.
Figure 4 discloses a more simple embodiment with the particle board 3' placed in the same way as in Figure 3. However, the frame 4 has been omitted and the groove 4 is made directly in the edges of the particle board 3'.
The described panel is mounted so that the plastics laminate 1, which has a great resistance to wear and is easy to clean, is hit by the ball. As the laminate 1 is relatively expensive, only thin laminates are used, thus transferring the striking work from the ball, which has a weight of 23 - 24 grams and speeds of about 30 m/sec., to the underlying hard wood fibre board 2, to which the laminate 1 is glued.
The hard wood fibre board 2 has a density of about 0.9 and supports the laminate 1, i.e.
prevents it from cracking, at the same time as it damps and transfers the striking force of the ball to a larger area of the particle board 3 than would be the case if the laminate 1 had been glued directly to the particle board 3.
Such a particle board 3 has a density of 0.4 to 0.6 and absorbs less striking force than the hard wood fibre board 2.
WHAT WE CLAIM IS: 1. A wall panel for forming a wall for use in a ball game in which a ball is caused to strike the wall, comprising a central body consisting of, or substantially of, a particle board and on each side thereof a thermosetting plastics laminate glued to a face of a hardboard glued to the central body with the hardboard between the plastics laminate and the central body, the plastics laminate having been first glued to the hardboard and the hardboard then having been glued to the central body.
2. A wall panel as claimed in claim 1, in which the thickness of the plastics laminate is 0.2 to 1.5 mm.
3. A wall panel as claimed in claim 2, in which the thickness of the plastics laminate is 0.6 to 1.0 mm.
4. A wall panel as claimed in any preceding claim, in which the thickness of the hardboard is 2 to 5 mm.
5. A wall panel as claimed in claim 4, in which the thickness of the hardboard is 3 mm.
6. A wall panel as claimed in any preceding claim, in which the thickness of the central body is 12 to 60 mm.
7. A wall panel as claimed in claim 6, in which the thickness of the central body is 25 to 40 mm.
8. A wall panel as claimed in any preceding claim, in which the central body consists of strips of particle board placed side-by-side and extending lengthways of the panel.
9. A wall panel as claimed in any preceding claim, in which the central body is provided with a wood frame surrounding the edges of the particle board.
10. A wall panel as claimed in any preceding claim, in which the edges of the panel are provided with a groove for receiving a loose tongue for connecting adjacent panels with each other.
11. A wall panel substantially as hereinbefore described with reference to and as illustrated in Figure 2 or Figure 3 or Figure 4 of the accompanying drawing.
12. A wall formed by wall panels as claimed in any preceding claim.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. plane of the panel, in which case the thickness of the board is the thickness of the body, thus constituting the dimension T. The body is here, as in the embodiment according to Figure 2, surrounded by a frame 4. Figure 4 discloses a more simple embodiment with the particle board 3' placed in the same way as in Figure 3. However, the frame 4 has been omitted and the groove 4 is made directly in the edges of the particle board 3'. The described panel is mounted so that the plastics laminate 1, which has a great resistance to wear and is easy to clean, is hit by the ball. As the laminate 1 is relatively expensive, only thin laminates are used, thus transferring the striking work from the ball, which has a weight of 23 - 24 grams and speeds of about 30 m/sec., to the underlying hard wood fibre board 2, to which the laminate 1 is glued. The hard wood fibre board 2 has a density of about 0.9 and supports the laminate 1, i.e. prevents it from cracking, at the same time as it damps and transfers the striking force of the ball to a larger area of the particle board 3 than would be the case if the laminate 1 had been glued directly to the particle board 3. Such a particle board 3 has a density of 0.4 to 0.6 and absorbs less striking force than the hard wood fibre board 2. WHAT WE CLAIM IS:
1. A wall panel for forming a wall for use in a ball game in which a ball is caused to strike the wall, comprising a central body consisting of, or substantially of, a particle board and on each side thereof a thermosetting plastics laminate glued to a face of a hardboard glued to the central body with the hardboard between the plastics laminate and the central body, the plastics laminate having been first glued to the hardboard and the hardboard then having been glued to the central body.
2. A wall panel as claimed in claim 1, in which the thickness of the plastics laminate is 0.2 to 1.5 mm.
3. A wall panel as claimed in claim 2, in which the thickness of the plastics laminate is 0.6 to 1.0 mm.
4. A wall panel as claimed in any preceding claim, in which the thickness of the hardboard is 2 to 5 mm.
5. A wall panel as claimed in claim 4, in which the thickness of the hardboard is 3 mm.
6. A wall panel as claimed in any preceding claim, in which the thickness of the central body is 12 to 60 mm.
7. A wall panel as claimed in claim 6, in which the thickness of the central body is 25 to 40 mm.
8. A wall panel as claimed in any preceding claim, in which the central body consists of strips of particle board placed side-by-side and extending lengthways of the panel.
9. A wall panel as claimed in any preceding claim, in which the central body is provided with a wood frame surrounding the edges of the particle board.
10. A wall panel as claimed in any preceding claim, in which the edges of the panel are provided with a groove for receiving a loose tongue for connecting adjacent panels with each other.
11. A wall panel substantially as hereinbefore described with reference to and as illustrated in Figure 2 or Figure 3 or Figure 4 of the accompanying drawing.
12. A wall formed by wall panels as claimed in any preceding claim.
GB43097/77A 1977-10-17 1977-10-17 Wall panel for ball games Expired GB1568736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB43097/77A GB1568736A (en) 1977-10-17 1977-10-17 Wall panel for ball games

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB43097/77A GB1568736A (en) 1977-10-17 1977-10-17 Wall panel for ball games

Publications (1)

Publication Number Publication Date
GB1568736A true GB1568736A (en) 1980-06-04

Family

ID=10427316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43097/77A Expired GB1568736A (en) 1977-10-17 1977-10-17 Wall panel for ball games

Country Status (1)

Country Link
GB (1) GB1568736A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee