Source: https://patents.google.com/patent/EP0028862B1/en
Timestamp: 2020-05-26 09:00:27
Document Index: 127819160

Matched Legal Cases: ['art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4', 'art 4']

EP0028862B1 - Method and apparatus for forming a plate with at least one profiled border - Google Patents
Method and apparatus for forming a plate with at least one profiled border Download PDF
EP0028862B1
EP0028862B1 EP80201052A EP80201052A EP0028862B1 EP 0028862 B1 EP0028862 B1 EP 0028862B1 EP 80201052 A EP80201052 A EP 80201052A EP 80201052 A EP80201052 A EP 80201052A EP 0028862 B1 EP0028862 B1 EP 0028862B1
EP80201052A
EP0028862A1 (en
EP0028862B2 (en
Waltherus Joseph Maria Van Erven
Zodiac Europe SA
VAN ERVEN, Waltherus Joseph Maria
1980-11-05 Application filed by VAN ERVEN, Waltherus Joseph Maria filed Critical VAN ERVEN, Waltherus Joseph Maria
1981-05-20 Publication of EP0028862A1 publication Critical patent/EP0028862A1/en
1984-08-29 Publication of EP0028862B1 publication Critical patent/EP0028862B1/en
1985-05-25 First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19834126&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0028862(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
1989-11-02 Publication of EP0028862B2 publication Critical patent/EP0028862B2/en
The invention relates to a method of forming a composite plate having at least one profiled edge, comprising a base sheet and a cover sheet connected therewith, the cover sheet being partly connected with the base sheet in a manner such that a peripheral part of the cover sheet protrudes beyond the edges of the base sheet, in the proximity of which edge the profiled edge has to be formed.
Such a method is known from US-A-3,392,074. In this method a filling piece having the profile of the profiled edge is arranged at the edge of the base sheet, after which the cover sheet is glued to the filling piece under, pressure. A disadvantage of this method is that due to the curved face of the profiled edge it is particularly difficult to ensure that during glueing the pressure should be everywhere sufficiently high. If the pressure is not sufficiently high, the glue connection becomes locally defective and hence the cover sheet will not satisfactorily join the filling piece. Where the junction is not satisfactory, the cover sheet may readily crack when struck. Moreover, the insufficiently joined parts may form bubbles in the course of time and under the influence of heat. A further disadvantage resides in that the insert is expensive because it has to be of hard wood in order to ensure adequate resistance to strokes on the profiled edge, and it has to be milled into the desired profile.
The invention has for its object to produce such a composite plate in a simpler manner, so that the occurrence of non-joining parts of the cover sheet is avoided. According to the invention this is achieved by a method comprising the following successive steps:
a. deforming the peripheral part of the cover sheet out of its plane according to the profile of the profiled edge;
b. filling out a space bounded by the peripheral part of the cover sheet and the edge of the base sheet with a curable filling agent adhering to the two sheets, and
c. curing of the filling agent.
Because the filling agent is introduced into the space in the liquid state, it comes into contact with the entire surface of the cover plate bounding said space so that subsequent to curing of the filling agent there are no non-joining parts. Since the cumbersome arrangement of the filling piece on the base sheet is avoided, the method according to the invention is materially simpler. For this reason and because no expensive, profiled hard-wood insert is required, the ready composite plate is appreciably cheaper.
In a preferred method the cover sheet is not connected with the base sheet over an area next to the edge of the base sheet. In this way the cover sheet can also be deformed in the not-connected part, so that the not-connected part of the base sheet extends into the profiled edge part. In this way filling agent can advantageously be saved.
When, according to the invention in employing this last mentioned preferred method, a groove is recessed in the area of the base sheet not to be connected with the cover sheet, before the cover sheet is connected with the base sheet, the boarder between the connected and the not-connected part is defined by this groove. This boarder therefore can be a straight line, so that, when the profiled edge has a bend directly from said boarder, this bend will also extend along a straight line.
The method is advantageously employed for manufacturing a composite plate, in which the base sheet is plywood or wood fibre sheet and the cover sheet is a thermo-hardening synthetic resin sheet of post-formable type. The curing process there is not yet completed and by heating the cover sheet it will still once be plastically deformed.
The method according to the invention is particularly suitable for manufacturing a kitchen drain board with a water-arresting rim.
To attain a swift production and a good filling of the space, the curable filling agent is preferably pressure fed into the space between the cover sheet and the base sheet.
The invention relates furthermore to and provides a device for forming a composite plate having at least one profiled edge, said device comprising a connecting device for partly connecting a cover sheet with a base sheet in a manner such that a peripheral part of the cover sheet projects beyond the edge of the base sheet, in the proximity of which edge the profiled edge has to be formed and a table and, moreover, a mould connected with the table and having the profile of the profiled edge, holding means connected with the table for retaining the connected sheets on the table, positioning means for nestling the peripheral part of the cover sheet with an outer surface against the mould and a filling-agent supply device.
A preferred embodiment of the device according to the invention comprises heating means heating the peripheral part of the cover sheet so that post-formable, thermo-hardening sheet material can be used for the cover sheet.
It is particularly advantageous to have the mould movable with respect to-the base sheet retained on the table so that during the process the base sheet with the cover sheet need not be shifted in place for nestling the peripheral part in the mould. Thus the risk of damage of the cover sheet during the manufacturing process is drastically reduced.
From US-A-3,393,107 a method for forming a composite plate is known, in which a cover sheet is connected with a base sheet in such a way that a peripheral part of the cover sheet protrudes beyond the edge of the base sheet. Furthermore a space bounded by the peripheral part of the cover sheet and the edge of the base sheet is filled with a curable filling agent. However, the protruding peripheral part of the cover sheet is not deformed and the profiled edge is formed by an outer surface of the cured filling agent.
The abovementioned and further features of the invention will be explained in the following description with reference to the drawings.
Figures 1a, 1b, 1 schematically three phases in the production of a composite plate by carrying out the method in accordance with the invention.
Figure 2 a sectional view of a composite plate having two different profiled edges manufactured by carrying out the method in accordance with the invention,
Figure 3 on an enlarged scale a detail III of figure 2.
Figure 4 a sectional view like figure 3 of a different embodiment of a profiled edge,
Figure 5 a sectional view of a different profiled edge,
Figure 6 a perspective view partly broken away and partly sectioned of a device in accordance with the invention for manufacturing a profiled edge according to detail VI in figure 2 and
Figure 7 a sectional view of a different embodiment of a device in accordance with the invention.
Figure 8 an enlarged schematic sectional view corresponding to figure 7 of a device using a different method according to the invention,
Figure 9 a sectional view corresponding to figure 8 showing a different embodiment of a profiled edge.
Figure 10 a sectional view corresponding to figures 8 and 9, showing another different embodiment of a profiled edge.
Figures 1 a, 1 b, 1 c illustrate the manufacture of a composite plate 1 in accordance with the invention. A conveyor device 50 supplies a base sheet 2. The base sheet 2 may be of wood, metal or synthetic resin. The glueing device 51 arranged above the conveyor device 50 supplies glue 19 from a reservoir 55 applied by a roller 56 to the base sheet 2, whilst this base sheet 2 is moved in the direction indicated by the arrow 57. In a further phase (fig. 1 b) a cover sheet 3 supplied from a stock holder 58 arranged above the conveyor device 50 is applied to the base sheet 2 provided with glue 19. The cover sheet 3 is taken out of the holder 58 by relatively cooperating transport rollers 52, which carry the cover sheet 3 towards the roller press 53, by which the cover sheet 3 is forcibly pressed onto the base sheet 2. The cover sheet 3 may be a foil, for example, a vinyl foil or a sheet of synthetic resin, veneer or metal. The cover sheet 3 is applied in a manner such that a peripheral part thereof protrudes beyond the edge of the base sheet 2. Subsequently the base sheet 2 with the cover sheet 3 parity bonded thereto is inverted (indicated symbolically by the arrow 54) and positioned on a table 7 against a stop 34 arranged at a given distance from a mould 8. The mould 8 has a profile corresponding with the desired profile of the profiled edge 5. The base sheet 2 is then clamped tight to the table 7 by means of holding members 10, which are movable towards the table 7 and can be fixed in a desired position relative to the table 7. In order to ensure that the outer surface of the peripheral part 4 is everywhere in satisfactory contact with the mould 8, positioning means 11 movable with respect to the mould 8 are arranged for pressing the peripheral part 4 in the mould 8. The space 12 bounded by the peripheral part 4 of the cover sheet 3 and the edge 6 of the base sheet 2 is then filled with a curable filling agent 13 adhering to the two sheets. The filling agent 13 is supplied from a nozzle 38 of a filling-agent supply device (not shown). When the space 12 is completely filled up with the filling agent, the supply is stopped and the filling agent is allowed to cure. Subsequently the ready composite plate 1 can be removed out of the mould 8 and from the table 7 after the positioning means 11 and the holding means 10 have been moved into a rest position at a distance from the composite slab 1. Any redundant filling agent protruding out of the surface 35 of the base sheet 2 is subsequently ground away.
Figure 2 shows a composite plate 1 manufactured by the method according to the invention, which is intended for use as a kitchen drain board. This composite plate 1 has two profiled edges 5a and 5b. The profiled edge 5a on the left-hand side of figure 2 protrudes upwards from the top surface 14 of the composite plate 1. In this way a water-arresting rim 15 is formed to prevent water from flowing away from the composite plate 1 during use. In this case the base sheet 2 is made from plywood or compressed wood fibre. The cover plate 3 is a sheet of thermo-hardening synthetic resin of a post-formable type. A property of this type is that the synthetic resin has not yet completely cured chemically, so that it can still once be rendered plastically deformable by heating it. Consequently, before the peripheral part 4 of the cover sheet 3 is nestled against the mould 8, it is heated.
Figure 2 shows that a stand piece 16 is arranged on the base sheet 2 in order to obtain the desired height of the profiled edge 5a. At the area of the profiled edge 5a the shape of the edge 6 of the base sheet 2 is roughly adapted to the profile of the profiled edge 5a. As a result a smaller amount of filling agent 13 is required for filling out the space 12 between the peripheral part 4 of the cover sheet 3 and the edge 6 of the base sheet 2. In this embodiment the surface of the edge 6 merges through an interface 17 transverse of the connecting surface 1 8 of the base sheet 2 with the cover sheet 3 in said surface. This has the advantage that the glue 19, which is forced from between the base sheet 2 and the cover sheet 3 when the latter are joined, does not interconnect the sheets 3 and 2 more than is desired (see figure 3). Any further connection is, however, possible when the surface of the rim 6 joins the connecting surface 18 without a transverse interface 17 between the base sheet 2 and the cover plate 3, as is indicated in figure 4. If in the latter case at different places different amounts of glue 19 are pinched from between the sheets 2 and 3, as will occur in practice, the bend 20 of the cover sheet 3 will not form a straight line in the longitudinal direction of the composite plate 1 where it terminates in the water-arresting rim 15. This is avoided by the arrangement of the transverse interface 17.
A material particularly suitable for use as a filling agent is polyurethane resin. This material cures very rapidly owing to the chemical reaction between two components which are mixed directly prior to filling the space with material.
Figure 5 shows a profiled edge 5, where the cover sheet 3 is bent back towards the edge 6 of the base sheet 2. Thus the profiled edge 5 has a finished appearance also in an inclined view from below.
Figure 6 shows a device 29 for carrying out the method according to the invention. This device 29 is constructed for making a water-arresting rim as shown in figure 1c. Corresponding parts are designated by the same reference numerals and have the same function as in figure 1 c. In this case the holding means 10 are formed by a plurality of suction pads 30, only one of which is shown. The suction pads 30 engage by vacuum the top surface 14 of smooth synthetic resin of the cover sheet 3. The positioning means 11 are formed in this case by a first and a second comb-shaped member 22 and 23 respectively. The second comb-shaped member 23 protrudes into the first member 22 and can be moved in the direction indicated by the arrow 24 by allowing compressed air to flow through the duct 25 into the hose 26. During this movement the cover sheet 3 is forced into contact with the mould 8. Movement in the reverse direction is brought about by springs 31.
As stated above, the projecting peripheral part 4 of the thermo-hardening synthetic resin cover plate 3 has to be heated in order to render it deformable. In the embodiment shown in figure 6 the cover sheet 3 partly connected with the base sheet 2 is, to this end, positioned on the table 7 and the step means 11 in a manner such that the peripheral part 4 protrudes out of the stop means 11. With the aid of heating means (not shown), the peripheral part 4 is subsequently brought to the desired temperature. The base sheet 2 with the cover sheet 3 is then moved to the correct place on the table 7 against a stop 34, after which the peripheral part 4 can be aligned to the mould 8 by the stop means 11. Since the filling agent supply device may be a device known per se it is not shown here; only the nozzle 38 thereof is schematically shown.
Figure 7 shows schematically a preferred embodiment of the device 33 according to the invention, in which the mould 8 can be moved by driving means (not shown) from the rest position 36 to the base sheet 2 clamped tight to the table 7 by the holding means 10 and being in contact with the stop 34, said base sheet 2 being provided with the cover sheet 3 made from post-deformable, thermo-hardening synthetic resin, into the operative position 37. This embodiment comprises heating means for the peripheral part 4. After the peripheral part 4 is brought to the desired temperature and is therefore again deformable, said means 27 are moved away in the direction indicated by the arrow 28, next the mould 8 is nestled against the peripheral part 4 and the process is finished. The advantage of this device is that the base sheet 2 with the cover plate 3 partly connected herewith need not be shifted in place with respect to the mould 8 subsequent to heating of the peripheral part 4 so that the risk of damage of the cover plate 3 during the execution of the method is reduced. In this embodiment the stop means 11 are formed by a profile 59 movable with respect to the mould 8 and guided thereby.
According to a preferred method the curable filling agent is pressure fed into the space 12. As shown in figures 8-10 a filling channel 60 is drilled in the base sheet 2 beforehand. When the base sheet 2, with the heated cover sheet 3 is positioned in the mould 8, a closure plate 65 is arranged, closing the space 12. A nozzle 61 of an injection head 62 is connected to the channel 60. The injection head 62 forms a part of an apparatus known as such, for pressure injection of curable two-component material. In this way the space 12 is filled under pressure with the curable filling agent, whereby not only the space is very well filled, but also the peripheral part 4 is nested extra well in the mould 8. Instead of in the base sheet 3, the filling channel 60 can also be arranged in the closure plate 65.
For certain forms of the desired profiled edge, it is not necessary to use a closure plate 65. As figure 9 shows, a good closure of the space 12 can also be attained, by pressing the corner 70 of the base sheet 2 in the direction of the arrow 71, against the peripheral part 4 of the cover sheet 3, supported by the mould 8. As figure 10 shows, the edge 6 of the base sheet 3 can also be chamfered in such a way that a point 74 is being formed, that is pressed in the direction of arrow 75 against the peripheral part 4, to obtain a good closure.
1. A method of forming a composite plate (1), having at least one profiled edge (5), comprising a base sheet (2) and a cover sheet (3) connected therewith, the cover sheet (3) being partly connected with the base sheet (2) in a manner such that a peripheral part (4) of the cover sheet (3) protrudes beyond the edge (6) of the base sheet (2), in the proximity of which edge (6) the profiled edge (5) has to be formed, characterized by the following successive steps:
a. deforming the peripheral part (4) of the cover sheet (3) out of its plane according to the profile of the profiled edge;
b. filling out a space (12) bounded by the peripheral part (4) of the cover sheet (3) and the edge (6) of the base sheet with a curable filling agent (13) adhering to the two sheets (2, 3), and
c. curing of the filling agent (13).
2. A method as claimed in Claim 1, characterized in that the cover sheet (3) is not connected with the base sheet (2) over an area next to the edge (6) of the base sheet (2).
3. A method as claimed in Claim 2, characterized in that before the cover sheet is connected with a connecting surface (18) of the base sheet (2), a groove is recessed in the area of the base sheet not to be connected with the cover sheet.
4. A method as claimed in any one of the preceding Claims characterized in that as a base sheet (2) is used a wooden sheet, for example, of plywood or compressed wood fibre.
5. A method as claimed in any one of the preceding Claims characterized in that as a cover sheet (3) is used a thermo-hardening synthetic resin sheet of a postformable type.
6. A method as claimed in any one of the preceding Claims characterized in that the outer face of the peripheral part of the cover plate is nestled against a mould (8), the profile of which has the shape of a water-arresting rim.
7. A method as claimed in any one of the preceding Claims characterized in that the curable filling agent is pressure fed into the space (12) between the cover sheet (3) and the base sheet (2) (Fig. 8).
8. A device for forming a composite plate having at least one profiled edge (5), said device comprising a connecting device for partly connecting a cover sheet (3) with a base sheet (2) in a manner such that a peripheral part (4) of the cover sheet (3) projects beyond the edge (6) of the base sheet (2), in the proximity of which edge (6) the profiled edge (5) has to be formed and a table (7) characterized by
a mould (8) connected with the table (7) and having the profile of the profiled edge (5),
holding means (10) connected with the table (7) for retaining the connected sheets (2, 3) on the table (7),
positioning means (11) for nestling the peripheral part (4) of the cover sheet (3) with an outer surface against the mould (8) and
a filling-agent supply device (38).
9. A device as claimed in Claim 8 characterized in that heating means (27) are provided for heating the peripheral part (4) of the cover sheet (3).
10. A device as claimed in Claim 8 or 9 characterized in that the holding means (10) are formed by suction pads (30) communicating with an exhaust pump and acting upon the outer face of the cover sheet (3).
11. A device as claimed in any one of Claims 8 to 10 characterized in that the positioning means (11) comprise a first comb-shaped member aligned to a wall of the mould (8) and a second comb-shaped member (23) engaging in and being movable in the plane of the former (Fig. 6).
12. A device as claimed in any one of Claims 8 to 11, characterized in that the mould (8) is movable by driving means with respect to the table (7) between a rest position at a distance from the edge (6) of the base sheet (2) and an operative, position in which it is connected with the table (7) (Fig. 7).
EP80201052A 1979-11-07 1980-11-05 Method and apparatus for forming a plate with at least one profiled border Expired EP0028862B2 (en)
EP0028862A1 EP0028862A1 (en) 1981-05-20
EP0028862B1 true EP0028862B1 (en) 1984-08-29
EP0028862B2 EP0028862B2 (en) 1989-11-02
EP80201052A Expired EP0028862B2 (en) 1979-11-07 1980-11-05 Method and apparatus for forming a plate with at least one profiled border
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1984-08-29 AK Designated contracting states
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1985-08-07 26 Opposition filed
Opponent name: DUROPAL-WERK EBERH. WREDE GMBH & CO. KG
Opponent name: WESTAG & GETALIT AG
1989-08-24 ITF It: translation for a ep patent filed
1989-11-02 27A Patent maintained in amended form
1989-12-08 ET3 Fr: translation filed ** decision concerning opposition
1990-03-16 NLR3 Nl: receipt of modified translations in the netherlands language after an opposition procedure
Ref document number: 80201052.0
1999-12-23 PGFP Annual fee paid to national office [announced from national office to epo]
1999-12-29 PGFP Annual fee paid to national office [announced from national office to epo]
Free format text: 20001105 *VANDERVEN WALTHERUS JOSEPH MARIA
2000-01-05 PGFP Annual fee paid to national office [announced from national office to epo]
2000-01-10 PGFP Annual fee paid to national office [announced from national office to epo]
Owner name: ZODIAC EUROPE S.A.
2000-11-04 PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]
2000-11-05 PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]
2001-01-02 NLV7 Nl: lapsed due to reaching the maximum lifetime of a patent