CA2292296A1 - Jointed composite lumber and method of fabrication - Google Patents
Jointed composite lumber and method of fabrication Download PDFInfo
- Publication number
- CA2292296A1 CA2292296A1 CA 2292296 CA2292296A CA2292296A1 CA 2292296 A1 CA2292296 A1 CA 2292296A1 CA 2292296 CA2292296 CA 2292296 CA 2292296 A CA2292296 A CA 2292296A CA 2292296 A1 CA2292296 A1 CA 2292296A1
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- CA
- Canada
- Prior art keywords
- lumber
- pieces
- piece
- jointed
- cut
- 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.)
- Abandoned
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Classifications
-
- 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
-
- 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
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
- B27M3/006—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected both laterally and at their ends
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
Description
JOINTED COMPOSITE LUMBER
AND
METHOD OF FABRICATION
BACKGROUND OF THE INVENTION
The invention relates to jointed composited lumber and a method of fabricating the same.
Lumber and sawmill operations generally involve an important (i.e. high) percentage of scrap material which may be the by-product of the manufacturing or transformation process. Such scrap product often cannot readily be recycled, as opposed to materials in other industries such as steel, aluminum, plastic, etc., and therefore may sometimes constitute a pure loss for the manufacturer, 1 S producer or transformer. Alternatively, the scrap pieces of lumber, i.e.
the scrap by-products, may be used to make wood chips for pulp and paper production, but said secondary use may not meet with wide acceptance, and may not add much added value to the manufacturing process.
For example, in a sawmill, which may produce thousands of feet of board, each finished piece of lumber probably had each of its two opposed ends cut in order to achieve the pre-required length.
For example, a piece of lumber 2 inches by 4 inches by 12 feet may have originally been 14.5 feet long, meaning that to obtain the required 12 foot finished length, there may be needed a cut at each end, resulting in a loss of 2.5 feet, either at one end, or divided between the two ends. This wastage may also occur for any other length of lumber, or with respect to any other size of lumber, for example lumber having a cross section of 2 inches by 3 inches, 2 inches by 10 inches, etc.
While some of the wastage may be very small, for example, one end of a piece of lumber may only have one inch cut off, often what may be cut may be several inches, and depending on the spacing of the saws used in the particular manufacturing process, may be up to just under 24 inches. Thus, as may understood, a highly significant quantity of scrap lumber of significant lengths may be produced as a result of many lumber operations.
Therefore it would be advantageous to provide for a jointed, composite piece of lumber which would be manufactured from scrap pieces of lumber, in order to provide added value where mainly scrap wood was previously resulted.
It would therefore be advantageous to provide for a method of manufacturing jointed, composite pieces of lumber from scrap pieces of lumber.
It would therefore be also advantageous to provide for a process of manufacturing jointed, composite pieces of lumber from scrap pieces of lumber.
It would also be advantageous to provide for a method to maximize the efficiency of a sawmill operation by taking advantage of almost all the scrap pieces which may be the by-product of lumber mill operation.
SUMMARY OF THE INVENTION
In accordance with a general aspect of the present invention, there may be provided for a jointed, composite lumber made from scrap pieces of lumber which otherwise may be discarded or cast off from sawmill and other such like operations. Although described herein below with respect to pieces of 2" by 3" lumber, the description may equally apply to other sizes of lumber. Jointed pieces of lumber are known in the art. For example, a piece of lumber of 2" by 3" by 12"
may be jointed to a second piece of 2" by 3" by 16" to form a piece of lumber 2" by 3" by 28"
long. At the joint, any known type of male/female grooves may be used in conjunction with glue of any known type to effect a bond.
AND
METHOD OF FABRICATION
BACKGROUND OF THE INVENTION
The invention relates to jointed composited lumber and a method of fabricating the same.
Lumber and sawmill operations generally involve an important (i.e. high) percentage of scrap material which may be the by-product of the manufacturing or transformation process. Such scrap product often cannot readily be recycled, as opposed to materials in other industries such as steel, aluminum, plastic, etc., and therefore may sometimes constitute a pure loss for the manufacturer, 1 S producer or transformer. Alternatively, the scrap pieces of lumber, i.e.
the scrap by-products, may be used to make wood chips for pulp and paper production, but said secondary use may not meet with wide acceptance, and may not add much added value to the manufacturing process.
For example, in a sawmill, which may produce thousands of feet of board, each finished piece of lumber probably had each of its two opposed ends cut in order to achieve the pre-required length.
For example, a piece of lumber 2 inches by 4 inches by 12 feet may have originally been 14.5 feet long, meaning that to obtain the required 12 foot finished length, there may be needed a cut at each end, resulting in a loss of 2.5 feet, either at one end, or divided between the two ends. This wastage may also occur for any other length of lumber, or with respect to any other size of lumber, for example lumber having a cross section of 2 inches by 3 inches, 2 inches by 10 inches, etc.
While some of the wastage may be very small, for example, one end of a piece of lumber may only have one inch cut off, often what may be cut may be several inches, and depending on the spacing of the saws used in the particular manufacturing process, may be up to just under 24 inches. Thus, as may understood, a highly significant quantity of scrap lumber of significant lengths may be produced as a result of many lumber operations.
Therefore it would be advantageous to provide for a jointed, composite piece of lumber which would be manufactured from scrap pieces of lumber, in order to provide added value where mainly scrap wood was previously resulted.
It would therefore be advantageous to provide for a method of manufacturing jointed, composite pieces of lumber from scrap pieces of lumber.
It would therefore be also advantageous to provide for a process of manufacturing jointed, composite pieces of lumber from scrap pieces of lumber.
It would also be advantageous to provide for a method to maximize the efficiency of a sawmill operation by taking advantage of almost all the scrap pieces which may be the by-product of lumber mill operation.
SUMMARY OF THE INVENTION
In accordance with a general aspect of the present invention, there may be provided for a jointed, composite lumber made from scrap pieces of lumber which otherwise may be discarded or cast off from sawmill and other such like operations. Although described herein below with respect to pieces of 2" by 3" lumber, the description may equally apply to other sizes of lumber. Jointed pieces of lumber are known in the art. For example, a piece of lumber of 2" by 3" by 12"
may be jointed to a second piece of 2" by 3" by 16" to form a piece of lumber 2" by 3" by 28"
long. At the joint, any known type of male/female grooves may be used in conjunction with glue of any known type to effect a bond.
-2-However, such pieces of jointed, end to end lumber have a number of weak spots, namely at each junction or joint, because each junction point traverses the full cross sectional area of the lumber.
Thus, due to this weakness, such built-pieces of lumber may not readily be used as structural members, and may not pass some, or all, building codes.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of a scrap piece of lumber;
Figure 2 is a perspective view of the scrap piece of lumber of Figure l, having male/female joints cut into the opposed lateral sides thereof;
Figure 3 is a top plan view of a number of grooved pieces of lumber as per Figure 2 which have been jointed along their lateral side in order to form a sheet of lumber;
Figure 4 is as top plan view of the sheet of lumber shown in Figure 3 further showing the location of potential cut lines along which the sheet of lumber may be sawed into individual pieces;
Figure S shows a jointed composite piece of lumber assembled from the pieces of lumber cut from the sheet shown in Figure 4;
DETAILED DESCRIPTION OF THE EMBODIMENTS
Figure 1 shows and example embodiment of a scrap piece of lumber 1 comprising opposed end surfaces 3 and (5), opposed lateral side surfaces (7) and (9), and opposed top and bottom surfaces
Thus, due to this weakness, such built-pieces of lumber may not readily be used as structural members, and may not pass some, or all, building codes.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of a scrap piece of lumber;
Figure 2 is a perspective view of the scrap piece of lumber of Figure l, having male/female joints cut into the opposed lateral sides thereof;
Figure 3 is a top plan view of a number of grooved pieces of lumber as per Figure 2 which have been jointed along their lateral side in order to form a sheet of lumber;
Figure 4 is as top plan view of the sheet of lumber shown in Figure 3 further showing the location of potential cut lines along which the sheet of lumber may be sawed into individual pieces;
Figure S shows a jointed composite piece of lumber assembled from the pieces of lumber cut from the sheet shown in Figure 4;
DETAILED DESCRIPTION OF THE EMBODIMENTS
Figure 1 shows and example embodiment of a scrap piece of lumber 1 comprising opposed end surfaces 3 and (5), opposed lateral side surfaces (7) and (9), and opposed top and bottom surfaces
-3-(11) and (13). Lumber (1) is shown as having roughly the shape of a 2" by 4", but it is understood that this cross sectional area may be different, for example 1" by 2", 2" by 3", 2" by 8", 2" by 10",
4" by 4", etc.. The piece of lumber (1) may be of any required type of wood, such as spruce, pine, maple, ash, etc. As shown, the piece of lumber (1) is a scrap piece of lumber, which ends (3) and
(5) have been cut such that they are substantially flat and at right angle to the longitudinal axis of lumber (1). Although piece of lumber (1) is shown as being generally of a rectangular, box configuration, it is understood that any other shape as required or desired may be employed.
Figure 2 illustrates a piece of lumber (1) as shown in Figure 1 further having an additional manufacturing step applied thereto. As may be seen, side edges (7) and (9) have had a series of grooves (21), (23) and (25) cut therein. The grooves (21), (23) and (25) are generally known as male/female joints, and may have any of a number of required or desired shapes, such as for example peak and valley type shapes (i.e. pointy type shapes) or may alternatively have a more square kind of configuration. As may be understood, grooves (21), (23) and (25) may be cut into sides (7) and (9) such that these grooves may fit into a correspondingly cut series of grooves of an adjacent piece of lumber (not shown).
Although lumber ( 1 ) is shown as having a series of three grooves (21 ), (23) and (25), it is understood that more or less grooves may be cut on a surface of lumber (1) in accordance with design requirements. For example, only one groove could be cut into the sides 7 and 9 of a piece of lumber, and a correspondingly shaped slot may be cut into an adjacent piece of lumber to fit therein.
Alternatively, four, five or more grooves may be cut.
Figure 3 is a top plan elevation view of a number ofpieces of lumber (la), (lb), (lc) and (ld), each of which may be similar to the pieces of lumber as shown in Figure 2. As may be understood, a number of pieces of lumber ( 1 a), ( 1 b), ( 1 c) and ( 1 d) as shown in Figure 2 have been pressed together in the direction ofmotion arrows (31) and (33) through the application of sufficient pressure in order that the tongue and groove elements (21), (23) and (25) of a piece of lumber (i.e. for example lb) may be forced to fit into the correspondingly shaped and sized grooves (21), (23) and (25) of adj scent pieces of lumber, i.e. ( 1 a), ( 1 c). As may be understood, the grooves of one piece of lumber may be substantially the mirror image of the grooves of an adj scent piece of lumber or if not exactly the same, configured such that the application of pressure in the direction of motion arrows (31 ) and (33) will enable some deformation of the grooves so that they are press-fitted one into the other.
In order to facilitate the holding together of adjacent pieces of lumber (la), (lb), (lc), (ld), an amount of glue may be applied in the tongues and grooves prior to their being pressed together in the direction of motion arrows (31 ) and (33). To that end, any known or required type of glue may be used, whether standard wood glue, specialized glues adapted for this application, or other types of adhesives. Further, in order to facilitate the holding together of adjacent pieces of lumber (1 ) the application of pressure may be done in conjunction with the application of heat, steam or any other known manufacturing process which may assist in the creation of a composite sheet of wood.
As may be understood, the end result of the application of pressure in the direction of motion arrows (31 ) and (33) is the creation of a sheet of wood, for example having a thickness of 2" by for example a height of 20" by an undetermined length. The length may, for example, be as long as the number of pieces of lumber which are pressed, glued or added thereto.
Figure 4 illustrates a top plan view of a sheet of lumber (35) being the result of the action illustrated in figure 3. Dotted lines A-A, B-B, C-C, and D-D represent potential cut-lines along which lumber sheet (35) may be cut in order to obtain composite strips of lumber (41), (43) and (45). The width of these composite pieces of lumber (41), (43) and (45) may vary one from another in accordance with the desired or required manufacturing process. Further, the cutting action may be effected through any conventional sawmill operation, such as for example, table saws, band saws, etc.... For example, width (41) may be 4", width (43) may be 6", width (45) may be 3", etc... Alternatively, widths (41 ), (43) and (45) may all be one width. As may be understood, the end result of the process as illustrated in Figure 4 may be the creation of strips of composite pieces of wood (41), (43) and (45) which may then be jointed together at their longitudinally opposed ends as illustrated in Figure S.
As illustrated in Figure 5, there is shown a jointed, composite piece of lumber (51) made up of two pieces (53) and (SS). Pieces (53) and (55) may be produced as a result of the method as illustrated in Figures 3 and 4, i.e. they may be individual pieces of lumber cut from a composite sheet (35).
Prior to being jointed together, pieces (53) and (55) may have had their opposed longitudinal ends (57), (59) and (61) cut into tongue and groove like configurations. As may be understood, ends (57) and (59) may be cut so that they be the mirror image of one another, such that their respective tongue and grooves may fit into each other, in order to make a joint . Thus, through the application of force in the direction of motion arrows (63) and (65), pieces (53) and (55) may be brought together to form a jointed composite piece of lumber (51). As may be understood, in order to facilitate the joining together of pieces (53) and (55), the use of glue or some other form of adhesive may be employed.
As further illustrated, piece (55) is shown with its second end (61) also being cut with a series of tongue and grooves therein. As may be understood, third piece of lumber (54) with it longitudinal ends (71) also having a series of tongue and grooves (73) cut therein may be brought together towards jointed composite lumber (51) in the direction of motion arrows (75) and (77) in order to create a longer piece of jointed composite lumber. As may be understood, grooves (61) and (73) may be the mirror image of each other such that they may fit one inside the other with or without the use of adhesive help.
As may be understood, the jointed composite piece of lumber (51) as illustrated in Figure 5 is made up ofthree (or more) individual pieces ofcomposite lumber, namely piece (53), (55) and (54), which total length may vary in accordance with requirements. As may further be seen, each of the individual pieces (53), (55) and (54) of composite lumber 51, may have a groove line (91 ), (93) and (95) which are, for illustration purposes, shown to be staggered one from another. These groove lines (91), (93) and (95) represent where the pieces of lumber as illustrated in Figures l and 2 were originally brought together through the application of side pressure in order to form a sheet of lumber 35. Thus as may be seen, groove lines (91), (93) and (95) may not be lined-up one with the other, which staggered groove lines provides additional strength to the jointed composite piece of lumber (51).
Figure 2 illustrates a piece of lumber (1) as shown in Figure 1 further having an additional manufacturing step applied thereto. As may be seen, side edges (7) and (9) have had a series of grooves (21), (23) and (25) cut therein. The grooves (21), (23) and (25) are generally known as male/female joints, and may have any of a number of required or desired shapes, such as for example peak and valley type shapes (i.e. pointy type shapes) or may alternatively have a more square kind of configuration. As may be understood, grooves (21), (23) and (25) may be cut into sides (7) and (9) such that these grooves may fit into a correspondingly cut series of grooves of an adjacent piece of lumber (not shown).
Although lumber ( 1 ) is shown as having a series of three grooves (21 ), (23) and (25), it is understood that more or less grooves may be cut on a surface of lumber (1) in accordance with design requirements. For example, only one groove could be cut into the sides 7 and 9 of a piece of lumber, and a correspondingly shaped slot may be cut into an adjacent piece of lumber to fit therein.
Alternatively, four, five or more grooves may be cut.
Figure 3 is a top plan elevation view of a number ofpieces of lumber (la), (lb), (lc) and (ld), each of which may be similar to the pieces of lumber as shown in Figure 2. As may be understood, a number of pieces of lumber ( 1 a), ( 1 b), ( 1 c) and ( 1 d) as shown in Figure 2 have been pressed together in the direction ofmotion arrows (31) and (33) through the application of sufficient pressure in order that the tongue and groove elements (21), (23) and (25) of a piece of lumber (i.e. for example lb) may be forced to fit into the correspondingly shaped and sized grooves (21), (23) and (25) of adj scent pieces of lumber, i.e. ( 1 a), ( 1 c). As may be understood, the grooves of one piece of lumber may be substantially the mirror image of the grooves of an adj scent piece of lumber or if not exactly the same, configured such that the application of pressure in the direction of motion arrows (31 ) and (33) will enable some deformation of the grooves so that they are press-fitted one into the other.
In order to facilitate the holding together of adjacent pieces of lumber (la), (lb), (lc), (ld), an amount of glue may be applied in the tongues and grooves prior to their being pressed together in the direction of motion arrows (31 ) and (33). To that end, any known or required type of glue may be used, whether standard wood glue, specialized glues adapted for this application, or other types of adhesives. Further, in order to facilitate the holding together of adjacent pieces of lumber (1 ) the application of pressure may be done in conjunction with the application of heat, steam or any other known manufacturing process which may assist in the creation of a composite sheet of wood.
As may be understood, the end result of the application of pressure in the direction of motion arrows (31 ) and (33) is the creation of a sheet of wood, for example having a thickness of 2" by for example a height of 20" by an undetermined length. The length may, for example, be as long as the number of pieces of lumber which are pressed, glued or added thereto.
Figure 4 illustrates a top plan view of a sheet of lumber (35) being the result of the action illustrated in figure 3. Dotted lines A-A, B-B, C-C, and D-D represent potential cut-lines along which lumber sheet (35) may be cut in order to obtain composite strips of lumber (41), (43) and (45). The width of these composite pieces of lumber (41), (43) and (45) may vary one from another in accordance with the desired or required manufacturing process. Further, the cutting action may be effected through any conventional sawmill operation, such as for example, table saws, band saws, etc.... For example, width (41) may be 4", width (43) may be 6", width (45) may be 3", etc... Alternatively, widths (41 ), (43) and (45) may all be one width. As may be understood, the end result of the process as illustrated in Figure 4 may be the creation of strips of composite pieces of wood (41), (43) and (45) which may then be jointed together at their longitudinally opposed ends as illustrated in Figure S.
As illustrated in Figure 5, there is shown a jointed, composite piece of lumber (51) made up of two pieces (53) and (SS). Pieces (53) and (55) may be produced as a result of the method as illustrated in Figures 3 and 4, i.e. they may be individual pieces of lumber cut from a composite sheet (35).
Prior to being jointed together, pieces (53) and (55) may have had their opposed longitudinal ends (57), (59) and (61) cut into tongue and groove like configurations. As may be understood, ends (57) and (59) may be cut so that they be the mirror image of one another, such that their respective tongue and grooves may fit into each other, in order to make a joint . Thus, through the application of force in the direction of motion arrows (63) and (65), pieces (53) and (55) may be brought together to form a jointed composite piece of lumber (51). As may be understood, in order to facilitate the joining together of pieces (53) and (55), the use of glue or some other form of adhesive may be employed.
As further illustrated, piece (55) is shown with its second end (61) also being cut with a series of tongue and grooves therein. As may be understood, third piece of lumber (54) with it longitudinal ends (71) also having a series of tongue and grooves (73) cut therein may be brought together towards jointed composite lumber (51) in the direction of motion arrows (75) and (77) in order to create a longer piece of jointed composite lumber. As may be understood, grooves (61) and (73) may be the mirror image of each other such that they may fit one inside the other with or without the use of adhesive help.
As may be understood, the jointed composite piece of lumber (51) as illustrated in Figure 5 is made up ofthree (or more) individual pieces ofcomposite lumber, namely piece (53), (55) and (54), which total length may vary in accordance with requirements. As may further be seen, each of the individual pieces (53), (55) and (54) of composite lumber 51, may have a groove line (91 ), (93) and (95) which are, for illustration purposes, shown to be staggered one from another. These groove lines (91), (93) and (95) represent where the pieces of lumber as illustrated in Figures l and 2 were originally brought together through the application of side pressure in order to form a sheet of lumber 35. Thus as may be seen, groove lines (91), (93) and (95) may not be lined-up one with the other, which staggered groove lines provides additional strength to the jointed composite piece of lumber (51).
-6-
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2292296 CA2292296A1 (en) | 1999-12-15 | 1999-12-15 | Jointed composite lumber and method of fabrication |
| PCT/CA2000/001539 WO2001043928A1 (en) | 1999-12-15 | 2000-12-14 | Wood board made of a plurality of wood pieces, method of manufacture and apparatus |
| EP00986928A EP1237689A1 (en) | 1999-12-15 | 2000-12-14 | Wood board made of a plurality of wood pieces, method of manufacture and apparatus |
| US09/737,233 US6701984B2 (en) | 1999-12-15 | 2000-12-14 | Wood board made of a plurality of wood pieces, method of manufacture and apparatus |
| AU23354/01A AU2335401A (en) | 1999-12-15 | 2000-12-14 | Wood board made of a plurality of wood pieces, method of manufacture and apparatus |
| CA 2328338 CA2328338C (en) | 1999-12-15 | 2000-12-14 | Wood board made of a plurality of wood pieces, method of manufacture and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2292296 CA2292296A1 (en) | 1999-12-15 | 1999-12-15 | Jointed composite lumber and method of fabrication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2292296A1 true CA2292296A1 (en) | 2001-06-15 |
Family
ID=4164877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2292296 Abandoned CA2292296A1 (en) | 1999-12-15 | 1999-12-15 | Jointed composite lumber and method of fabrication |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2292296A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8109302B2 (en) | 2007-04-20 | 2012-02-07 | 0788490 B.C. Ltd. | System and method for trimming wood blocks |
| CN104032913A (en) * | 2013-12-02 | 2014-09-10 | 徐伟 | Solid wood pinch plate and manufacture method thereof |
-
1999
- 1999-12-15 CA CA 2292296 patent/CA2292296A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8109302B2 (en) | 2007-04-20 | 2012-02-07 | 0788490 B.C. Ltd. | System and method for trimming wood blocks |
| US8439183B2 (en) | 2007-04-20 | 2013-05-14 | 0788490 B.C. Ltd. | System and method for trimming wood blocks |
| CN104032913A (en) * | 2013-12-02 | 2014-09-10 | 徐伟 | Solid wood pinch plate and manufacture method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20021107 |