CA2107616C - Gluing device for veneer sheet stacks - Google Patents
Gluing device for veneer sheet stacksInfo
- Publication number
- CA2107616C CA2107616C CA002107616A CA2107616A CA2107616C CA 2107616 C CA2107616 C CA 2107616C CA 002107616 A CA002107616 A CA 002107616A CA 2107616 A CA2107616 A CA 2107616A CA 2107616 C CA2107616 C CA 2107616C
- Authority
- CA
- Canada
- Prior art keywords
- rollers
- stack
- roller
- glue
- engraved
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Coating Apparatus (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
The device applies a coating of glue on two longitudinal edges of elongated veneer sheet stacks. The device comprises two sets of glue distributing rollers. Each set is located on a corresponding edge of the stack and comprises an engraved roller and a substantially smooth roller rotating in opposite to the engraved roller. A
substantially liquid glue is poured between the rollers for applying it as the stack advances between the sets of glue distributing rollers.
substantially liquid glue is poured between the rollers for applying it as the stack advances between the sets of glue distributing rollers.
Description
GLUING DEVICE FOR VENEER SHEET STACKS
FIELD OF THE INVENTION
The present invention relates to a device fox applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks.
FIELD OF THE INVENTION
The present invention relates to a device fox applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks.
In the prior art, the gluing is usually done manually with a paint brush or with a spray gun applicator.
However, the layer of glue is not always uniform and problems might occur in the splicer because of a local surplus of glue. Additionally, the spraying of glue can be very hazardous for the health of the workers.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a device for applying a very uniform layer of glue on a veneer sheet stack.
More particularly, the object of the present invention is to provide a device for applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks, the device comprising:
a supporting surface;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack:
second pressing means far applying an offset force over a second plane surface of the stack, the second plane surface being opposite the first plane surface;
driving means for longitudinally advancing the stack over the supporting surface;
two sets of glue distributing rollers adjacent a corresponding longitudinal edge of the stack, at least one set being movable laterally, each set comprising:
- an engraved roller for engagement with its corresponding edge of the stack: and - a substantially smooth roller juxtaposed to the engraved roller for wiping off excesses of glue thereon; and ~~.~~61~
However, the layer of glue is not always uniform and problems might occur in the splicer because of a local surplus of glue. Additionally, the spraying of glue can be very hazardous for the health of the workers.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a device for applying a very uniform layer of glue on a veneer sheet stack.
More particularly, the object of the present invention is to provide a device for applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks, the device comprising:
a supporting surface;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack:
second pressing means far applying an offset force over a second plane surface of the stack, the second plane surface being opposite the first plane surface;
driving means for longitudinally advancing the stack over the supporting surface;
two sets of glue distributing rollers adjacent a corresponding longitudinal edge of the stack, at least one set being movable laterally, each set comprising:
- an engraved roller for engagement with its corresponding edge of the stack: and - a substantially smooth roller juxtaposed to the engraved roller for wiping off excesses of glue thereon; and ~~.~~61~
means for providing a substantially liquid glue on the engraved roller of each set of glue distributing rollers.
According to a preferred embodiment, the supporting surface co~pprises a plurality of evenly spaced apart horizontal rollers.
According to another preferred embodiment, the first pressing means comprise two opposite lateral roller assemblies, each located on a corresponding edge of the device and provided with a plurality of spaced apart 1o vertical rollers, at least one lateral roller assembly being movable laterally.
According to a still preferred embodiment, the second pressing means comprise a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface.
According to a still preferred embodiment, the driving means comprise a motor mechanically connected to at least one of the horizontal rollers for driving the same into rotation.
According to a still preferred embodiment, the engraved roller and the substantially smooth roller of each set of glue distributing rollers are rotated at a speed synchronized with an advancing speed of the stack, the substantially smooth roller of each set being rotated in opposition to the engraved roller.
According to a still preferred embodiment, the engraved roller has a thread-like groove over the surface thereof .
According to a still preferred embodiment, the megns for providing glue comprise a tube circuit having ends located at a top part between the engraved roller alnd the substantially smooth roller of a corresponding set of glue ' distributing rollers.
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According to a preferred embodiment, the supporting surface co~pprises a plurality of evenly spaced apart horizontal rollers.
According to another preferred embodiment, the first pressing means comprise two opposite lateral roller assemblies, each located on a corresponding edge of the device and provided with a plurality of spaced apart 1o vertical rollers, at least one lateral roller assembly being movable laterally.
According to a still preferred embodiment, the second pressing means comprise a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface.
According to a still preferred embodiment, the driving means comprise a motor mechanically connected to at least one of the horizontal rollers for driving the same into rotation.
According to a still preferred embodiment, the engraved roller and the substantially smooth roller of each set of glue distributing rollers are rotated at a speed synchronized with an advancing speed of the stack, the substantially smooth roller of each set being rotated in opposition to the engraved roller.
According to a still preferred embodiment, the engraved roller has a thread-like groove over the surface thereof .
According to a still preferred embodiment, the megns for providing glue comprise a tube circuit having ends located at a top part between the engraved roller alnd the substantially smooth roller of a corresponding set of glue ' distributing rollers.
.. .:: , .,;' .' ~;.. :, . ;: ..,.:~ . ., .
.., r. v. ; ;' . .. s .
t . ~ w - . ~.
w_ . . : - . :;'~
,, .. ,..:. ; .. ~.. ~ ..,: .: . . ,.,..:- ,..:.., .. , '' ~... ." . . .... .~ ..'. . ' ~. ~ ~~.~:.:'..
'..,' .. ,... . , . ..~. .. .,.. , . y . :.. .
According to a still preferred embodiment, the device further comprises a pan located under the set of glue distribution rollers for collecting surplus of glue.
It is also an object of the present invention to provide a device for applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks, the device comprising:
a plurality of evenly spaced apart rollers;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack, the first pressing means comprising two opposite lateral roller assemblies, each located on a corresponding edge of the device and provided with a plurality of spaced apart vertical rollers, at least one lateral roller assembly being movable laterally;
second pressing means for applying an offset force over a second plane surface of the stack, the second plane surface being opposite the first plane surface, the second pressing means comprising a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface;
driving means for longitudinally advancing the stack over the horizontal rollers, the driving means comprising a motor mechanically connected to at least one of the horizontal rollers for driving the same into rotation;
two sets of glue distributing rollers, at least one set being movable laterally, each set being positionable to be adjacent to a corresponding edge of the stack and comprising an engraved-roller having a thread-like groove over the surface thereof for engagement With a corresponding edge of the stack and a substantially smooth roller laterally juxtaposed to the engraved roller for wiping off excesses of glue thereon, the engraved rollers and the substantially 2~.~~~~.~
smooth rollers being rotated at a speed synchronized with an advancing speed of the stack, the substantially smooth rollers being rotated in opposition to their corresponding engraved roller; and 5 means for providing a substantially liquid glue on the engraved rollers, the means comprising two distribution tubes, each located at a top part between the engraved roller and the substantially smooth roller of a corresponding set of glue distributing rollers.
A non restrictive description of a preferred embodiment will now be given with reference to the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view df the gluing device according to an embodiment of the present invention, shown here without the upper roller assemblies;
FIG. 2 is a front view similar to FIG. 1, with the edges of a stack being currently glued;
FIG. 3 is a edge elevational view of the gluing device of FIG. 1;
FIG. 4 is a cross-sectional view of the device according to line IV-IV of FIG. 3:
FIG. 5 is a schematic view of a stack being pressed laterally and downwardly.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring to FIGS. 1 to 3, the gluing device 20 comprises a rigid main frame 21 having a feeding section 23 and a gluing section 25. The device 20 has a supporting surface for supporting the weight of the stack l0.
It is also an object of the present invention to provide a device for applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks, the device comprising:
a plurality of evenly spaced apart rollers;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack, the first pressing means comprising two opposite lateral roller assemblies, each located on a corresponding edge of the device and provided with a plurality of spaced apart vertical rollers, at least one lateral roller assembly being movable laterally;
second pressing means for applying an offset force over a second plane surface of the stack, the second plane surface being opposite the first plane surface, the second pressing means comprising a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface;
driving means for longitudinally advancing the stack over the horizontal rollers, the driving means comprising a motor mechanically connected to at least one of the horizontal rollers for driving the same into rotation;
two sets of glue distributing rollers, at least one set being movable laterally, each set being positionable to be adjacent to a corresponding edge of the stack and comprising an engraved-roller having a thread-like groove over the surface thereof for engagement With a corresponding edge of the stack and a substantially smooth roller laterally juxtaposed to the engraved roller for wiping off excesses of glue thereon, the engraved rollers and the substantially 2~.~~~~.~
smooth rollers being rotated at a speed synchronized with an advancing speed of the stack, the substantially smooth rollers being rotated in opposition to their corresponding engraved roller; and 5 means for providing a substantially liquid glue on the engraved rollers, the means comprising two distribution tubes, each located at a top part between the engraved roller and the substantially smooth roller of a corresponding set of glue distributing rollers.
A non restrictive description of a preferred embodiment will now be given with reference to the appended drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view df the gluing device according to an embodiment of the present invention, shown here without the upper roller assemblies;
FIG. 2 is a front view similar to FIG. 1, with the edges of a stack being currently glued;
FIG. 3 is a edge elevational view of the gluing device of FIG. 1;
FIG. 4 is a cross-sectional view of the device according to line IV-IV of FIG. 3:
FIG. 5 is a schematic view of a stack being pressed laterally and downwardly.
DESCRIPTION OF A PREFERRED EMBODIMENT
Referring to FIGS. 1 to 3, the gluing device 20 comprises a rigid main frame 21 having a feeding section 23 and a gluing section 25. The device 20 has a supporting surface for supporting the weight of the stack l0.
Each stack 10 comprises a plurality of elongated veneer sheets having substantially the same size, especially the same width.
This supporting surface preferably consists of a plurality of spaced apart horizontal rollers 22 allowing the stack 10 to be supported and to be moved longitudinally in the device 20 from the entry to the exit thereof. The rollers 22 are operatively attached to the edge rails 24 and driven by driving means which may comprise an electrical motor 26 mechanically connected to the end rollers by a chain or belt 28. Each roller 22 is connected to an adjacent roller 22 by means of belts connected to a main shaft (not shown). The supporting surface may also be a conveyor (not shown), a plurality of small wheels (not shown) or any other ..
similar system.
The glue application is achieved by two sets of rollers 50, each comprising a roller 52 and a roller 54, both rotating around a vertical pivot axis. Each set 50 is adjacently located to a corresponding longitudinal edge of the stack 10. The rollers 52 are engraved rollers having preferably a thread-like groove over the surface thereof, and the rollers 54 are substantially smooth rollers laterally juxtaposed to a corresponding engraved roller 52.
The rollers 52 and 54 are preferably supported by a support 55 and are rotated, at a speed synchronized with the advancing speed of the stack 10, by means of an electrical motor 56 mechanically connected thereon. The substantially smooth roller 54 of each pair 50 is rotated in opposition to the corresponding engraved roller 52.
The purpose of the engraved roller 52 is to directly apply the glue which is a substantially liquid glue provided by suitable means, preferably comprising a pump 60 taking glue from a tank (not shown) and circulating it through the device 20 by means of a tube circuit 61 having ~~'~6~.
This supporting surface preferably consists of a plurality of spaced apart horizontal rollers 22 allowing the stack 10 to be supported and to be moved longitudinally in the device 20 from the entry to the exit thereof. The rollers 22 are operatively attached to the edge rails 24 and driven by driving means which may comprise an electrical motor 26 mechanically connected to the end rollers by a chain or belt 28. Each roller 22 is connected to an adjacent roller 22 by means of belts connected to a main shaft (not shown). The supporting surface may also be a conveyor (not shown), a plurality of small wheels (not shown) or any other ..
similar system.
The glue application is achieved by two sets of rollers 50, each comprising a roller 52 and a roller 54, both rotating around a vertical pivot axis. Each set 50 is adjacently located to a corresponding longitudinal edge of the stack 10. The rollers 52 are engraved rollers having preferably a thread-like groove over the surface thereof, and the rollers 54 are substantially smooth rollers laterally juxtaposed to a corresponding engraved roller 52.
The rollers 52 and 54 are preferably supported by a support 55 and are rotated, at a speed synchronized with the advancing speed of the stack 10, by means of an electrical motor 56 mechanically connected thereon. The substantially smooth roller 54 of each pair 50 is rotated in opposition to the corresponding engraved roller 52.
The purpose of the engraved roller 52 is to directly apply the glue which is a substantially liquid glue provided by suitable means, preferably comprising a pump 60 taking glue from a tank (not shown) and circulating it through the device 20 by means of a tube circuit 61 having ~~'~6~.
ends 62 located in the middle upper gap of each set of rollers 50, as shown in FIGS. 1 and 2. As shown in FIG. 2, the glue sticks to the engraved rollers 52 and is distributed on the longitudinal edges of the advancing stack 10. As the glue is poured between the rollers 52 and 54, it slowly falls down under gravity and tends to accumulate at the lower portion of the engraved rollers 52. The substantially smooth rollers 54 help keeping a constant thickness of glue on their corresponding engraved roller 52 by counter-rotating at a given distance therefrom. The surplus of glue falling from the bottom of the rollers 52 and 54 goes to a funnel-like pan 70 where the glue may be accumulated and then recirculated through the pump 60.
At least one set of rollers 50 is movable along slides 51 laterally for adjusting the distances between the two sets of rollers 50 to the width of the stack 10. The movement of the movable set of rollers 50 relies on the position of a movable lateral roller assembly 30 described hereinafter. Preferably, an endless screw 10o driven by an electrical step motor 102 mechanically connected thereto by .
means of a chain or a timing belt 101 allows the movement of the movable set of rollers 50.
Referring to FIG. 3, the stack 1o first enters the device 20 by the entry table 23. The stack 10 is loaded in the device 20 either by hand or by an automatic loading machine (not shown).
Referring to FIGS. 3 to 5, first pressing means are used for applying a force on both longitudinal edges 12 of the stack 10 for urging them to be substantially perpendicular to a first plane surface thereof. These longitudinal. edges 12, being vertical in the preferred embodiment, have to be substantially. perpendicular to the supporting surface defined by the first plane overlying the rollers 22 so that the glue can be applied very uniformly ;.,~.,~:
- .::' . ' ;.;;:. ' ' .. ; .. , :: ,... . , . . .. .. ~. . . .
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s thereon. The first plane substantially coincides with the bottom veneer sheet of the stack 10 since it rests on the supporting surface.
In the preferred embodiment, the first pressing means comprise two opposite lateral roller assemblies 30, each located on a corresponding edge of the device 20 and provided with a plurality of spaced apart vertical rollers 32. Since the width of the stacks 10 may be different from one to the other, and for easying the loading of the stacks 10, at least one roller assembly 30 is movable laterally.
Referring to FIG. 4, this may be achieved by means of at least one pneumatic cable actuator 34 moving the, movable roller assembly 30 along a rail 36. An optical switch (not shown) may be used for stopping the movable roller assembly 30 at the right place before it crushes the veneer stack lo.
When the stack 10 is loaded, the distance between the two lateral roller assemblies 30 is maximum in order that enough room is created for the insertion of the stack l0. Once the stack 10 is on the supporting surface, the actuator 34 is operated by an optical switch for moving the stack 10 against the other lateral roller assembly 30 and for applying the lateral force. The force will then be applied on both edges because of the resultant force of the other lateral roller assembly 30.
second pressing means are provided for applying a downward offset force over the stack 10. In the preferred embodiment, this offset force is applied downwardly by means of a horizontal wheel assembly 40 provided with a plurality of substantially aligned wheels 42. The horizontal wheel assembly 40 may be moved up and down by means of pneumatic actuators 44.
As schematically shown in FIG. 5, the purpose of the horizontal wheel assembly 40 is to generate a small deformation 46 of the stack 10 for allowing the lateral 210'~61~' surplus of wood pushed inside by the vertical roller assembly 30 to go somewhere during the alignment of the sheets, and thus virtually unstress the excess of wood so as to produce aligned and smooth edges of the stack 10.
Referring to fIG. 3, two upper roller assemblies 80 may also be provided for applying a pressure on the top the stack 10 so that glue stays only on the longitudinal edges 12 and does not go between the sheets. The upper roller assemblies 80 comprise a plurality of rollers 81 and are operatively connected to the frame 21 by means of sliders 84 (partially shown) movable inside vertical beams of the frame 21. Both upper roller assemblies 80 are connected to each other by the sliders 84 and are moved up and down by means of two pneumatic actuators 82. A rod 86 mechanically connected to both sliders 84 ensures that they are both moved symmetrically together.
Once the stack 10 is at the exit of the device 20, it may go to a conveyor ( not shown ) bringing the stack 10 near a veneer splicer (not shown).
Although a preferred embodiment of the invention has been described in detail herein arid illustrated in the accompanying drawings, it is to be understood that the invention is not limited to this precise embodiment and that various changes and modifications may be effected therein without departing from the scope or spirit of the invention.
At least one set of rollers 50 is movable along slides 51 laterally for adjusting the distances between the two sets of rollers 50 to the width of the stack 10. The movement of the movable set of rollers 50 relies on the position of a movable lateral roller assembly 30 described hereinafter. Preferably, an endless screw 10o driven by an electrical step motor 102 mechanically connected thereto by .
means of a chain or a timing belt 101 allows the movement of the movable set of rollers 50.
Referring to FIG. 3, the stack 1o first enters the device 20 by the entry table 23. The stack 10 is loaded in the device 20 either by hand or by an automatic loading machine (not shown).
Referring to FIGS. 3 to 5, first pressing means are used for applying a force on both longitudinal edges 12 of the stack 10 for urging them to be substantially perpendicular to a first plane surface thereof. These longitudinal. edges 12, being vertical in the preferred embodiment, have to be substantially. perpendicular to the supporting surface defined by the first plane overlying the rollers 22 so that the glue can be applied very uniformly ;.,~.,~:
- .::' . ' ;.;;:. ' ' .. ; .. , :: ,... . , . . .. .. ~. . . .
2I0'~~~ L
s thereon. The first plane substantially coincides with the bottom veneer sheet of the stack 10 since it rests on the supporting surface.
In the preferred embodiment, the first pressing means comprise two opposite lateral roller assemblies 30, each located on a corresponding edge of the device 20 and provided with a plurality of spaced apart vertical rollers 32. Since the width of the stacks 10 may be different from one to the other, and for easying the loading of the stacks 10, at least one roller assembly 30 is movable laterally.
Referring to FIG. 4, this may be achieved by means of at least one pneumatic cable actuator 34 moving the, movable roller assembly 30 along a rail 36. An optical switch (not shown) may be used for stopping the movable roller assembly 30 at the right place before it crushes the veneer stack lo.
When the stack 10 is loaded, the distance between the two lateral roller assemblies 30 is maximum in order that enough room is created for the insertion of the stack l0. Once the stack 10 is on the supporting surface, the actuator 34 is operated by an optical switch for moving the stack 10 against the other lateral roller assembly 30 and for applying the lateral force. The force will then be applied on both edges because of the resultant force of the other lateral roller assembly 30.
second pressing means are provided for applying a downward offset force over the stack 10. In the preferred embodiment, this offset force is applied downwardly by means of a horizontal wheel assembly 40 provided with a plurality of substantially aligned wheels 42. The horizontal wheel assembly 40 may be moved up and down by means of pneumatic actuators 44.
As schematically shown in FIG. 5, the purpose of the horizontal wheel assembly 40 is to generate a small deformation 46 of the stack 10 for allowing the lateral 210'~61~' surplus of wood pushed inside by the vertical roller assembly 30 to go somewhere during the alignment of the sheets, and thus virtually unstress the excess of wood so as to produce aligned and smooth edges of the stack 10.
Referring to fIG. 3, two upper roller assemblies 80 may also be provided for applying a pressure on the top the stack 10 so that glue stays only on the longitudinal edges 12 and does not go between the sheets. The upper roller assemblies 80 comprise a plurality of rollers 81 and are operatively connected to the frame 21 by means of sliders 84 (partially shown) movable inside vertical beams of the frame 21. Both upper roller assemblies 80 are connected to each other by the sliders 84 and are moved up and down by means of two pneumatic actuators 82. A rod 86 mechanically connected to both sliders 84 ensures that they are both moved symmetrically together.
Once the stack 10 is at the exit of the device 20, it may go to a conveyor ( not shown ) bringing the stack 10 near a veneer splicer (not shown).
Although a preferred embodiment of the invention has been described in detail herein arid illustrated in the accompanying drawings, it is to be understood that the invention is not limited to this precise embodiment and that various changes and modifications may be effected therein without departing from the scope or spirit of the invention.
Claims (10)
1. A device for applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks, said device comprising:
a supporting surface;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack;
second pressing means for applying an offset force over a second plane surface of the stack, said second plane surface being opposite said first plane surface;
driving means for longitudinally advancing the stack over said supporting surface;
two sets of glue distributing rollers adjacent a corresponding longitudinal edge of the stack, at least one set being movable laterally, each set comprising:
- an engraved roller for engagement with its corresponding edge of the stack; and - a substantially smooth roller juxtaposed to the engraved holler for wiping off excesses of glue thereon; and means for providing a substantially liquid glue on the engraved roller of each set of glue distributing rollers.
a supporting surface;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack;
second pressing means for applying an offset force over a second plane surface of the stack, said second plane surface being opposite said first plane surface;
driving means for longitudinally advancing the stack over said supporting surface;
two sets of glue distributing rollers adjacent a corresponding longitudinal edge of the stack, at least one set being movable laterally, each set comprising:
- an engraved roller for engagement with its corresponding edge of the stack; and - a substantially smooth roller juxtaposed to the engraved holler for wiping off excesses of glue thereon; and means for providing a substantially liquid glue on the engraved roller of each set of glue distributing rollers.
2. A device according to claim 1, wherein said supporting surface comprises a plurality of evenly spaced apart horizontal rollers.
3. A device according to claim 2, wherein said first pressing means comprise two opposite lateral roller assemblies, each located on a corresponding edge of said device and provided with a plurality of spaced apart vertical rollers, at least one lateral roller assembly being movable laterally.
4. A device according to claim 2, wherein said second pressing means comprise a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface.
5. A device according to claim 2, wherein said driving means comprise a motor mechanically connected to at least one of said horizontal rollers for driving the same into rotation.
6. A device according to claim 1, wherein said engraved roller and said substantially smooth roller of each set of glue distributing rollers are rotated at a speed synchronized with an advancing speed of the stack, said substantially smooth roller of each set being rotated in opposition to said engraved roller.
7. A device according to claim 1, wherein said engraved roller has a thread-like groove over the surface thereof.
8. A device according to Claim 1, wherein said means for providing glue comprise a tube circuit having ends located at a top part between said engraved roller and said substantially smooth roller of a corresponding set of glue distributing rollers.
9. A devise according to claim 1, further comprising a pan located under said set of glue distributing rollers for collecting surplus of glue.
10. A device for applying a coating of glue on two longitudinal edges of elongated veneer sheet stacks, said device comprising:
a plurality of evenly spaced apart rollers;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack, said first pressing means comprising two opposite lateral roller assemblies, each located on a corresponding edge of said device and provided with a plurality of spaced apart vertical rollers, at least one lateral roller assembly being movable laterally;
second pressing means for applying an offset force over a second plane surface of the stack, said second plane surface being opposite said first plane surface, said second pressing means comprising a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface;
driving means for longitudinally advancing the stack over said horizontal rollers, said driving means comprising a motor mechanically connected to at least one of said horizontal rollers for driving the same into rotation;
two sets of glue distributing rollers, at least one set being movable laterally, each set being positionable to be adjacent to a corresponding edge of the stack and comprising an engraved roller having a thread-like groove over the surface thereof for engagement with a corresponding edge of the stack and a substantially smooth roller laterally juxtaposed to the engraved roller for wiping off excesses of glue thereon, said engraved rollers and said substantially smooth rollers being rotated at a speed synchronized with an advancing speed of the stack, said substantially smooth rollers being rotated in opposition to their corresponding engraved roller; and means for providing a substantially liquid glue on the engraved rollers, said means comprising two distribution tubes, each located at a top part between said engraved roller and said substantially smooth roller of a corresponding set of glue distributing rollers.
a plurality of evenly spaced apart rollers;
first pressing means for applying a force on the longitudinal edges of a stack, thereby urging them to be substantially perpendicular to a first plane surface of the stack, said first pressing means comprising two opposite lateral roller assemblies, each located on a corresponding edge of said device and provided with a plurality of spaced apart vertical rollers, at least one lateral roller assembly being movable laterally;
second pressing means for applying an offset force over a second plane surface of the stack, said second plane surface being opposite said first plane surface, said second pressing means comprising a horizontal wheel assembly provided with a plurality of substantially aligned wheels for engagement with said second plane surface;
driving means for longitudinally advancing the stack over said horizontal rollers, said driving means comprising a motor mechanically connected to at least one of said horizontal rollers for driving the same into rotation;
two sets of glue distributing rollers, at least one set being movable laterally, each set being positionable to be adjacent to a corresponding edge of the stack and comprising an engraved roller having a thread-like groove over the surface thereof for engagement with a corresponding edge of the stack and a substantially smooth roller laterally juxtaposed to the engraved roller for wiping off excesses of glue thereon, said engraved rollers and said substantially smooth rollers being rotated at a speed synchronized with an advancing speed of the stack, said substantially smooth rollers being rotated in opposition to their corresponding engraved roller; and means for providing a substantially liquid glue on the engraved rollers, said means comprising two distribution tubes, each located at a top part between said engraved roller and said substantially smooth roller of a corresponding set of glue distributing rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002107616A CA2107616C (en) | 1993-10-04 | 1993-10-04 | Gluing device for veneer sheet stacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002107616A CA2107616C (en) | 1993-10-04 | 1993-10-04 | Gluing device for veneer sheet stacks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2107616A1 CA2107616A1 (en) | 1995-04-05 |
| CA2107616C true CA2107616C (en) | 1999-09-07 |
Family
ID=4152396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002107616A Expired - Fee Related CA2107616C (en) | 1993-10-04 | 1993-10-04 | Gluing device for veneer sheet stacks |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2107616C (en) |
-
1993
- 1993-10-04 CA CA002107616A patent/CA2107616C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2107616A1 (en) | 1995-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |