CA1131873A - Tongue and groove boards with spacers permitting expansion, and method of making the same - Google Patents
Tongue and groove boards with spacers permitting expansion, and method of making the sameInfo
- Publication number
- CA1131873A CA1131873A CA350,398A CA350398A CA1131873A CA 1131873 A CA1131873 A CA 1131873A CA 350398 A CA350398 A CA 350398A CA 1131873 A CA1131873 A CA 1131873A
- Authority
- CA
- Canada
- Prior art keywords
- projections
- boards
- groove
- board
- rib
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/10—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements of wood or with an outer layer of wood
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Finishing Walls (AREA)
- Connection Of Plates (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE.
Tongue and groove boards are provided with integral spacers that permit expansion of the assembled boards without buckling, by milling on the bottom of the groove a central longi-tudinally extending rib of triangular cross section. Spaced por-tions of the rib, of total length that is most of the length of the board, are then compressed to the level of the bottom of the groove, thereby leaving a series of relatively weak projections which serve to space the boards apart the necessary distance during assembly, but which are not strong enough to resist compres-sion upon expansion of the boards under the influence of moisture or temperature.
Tongue and groove boards are provided with integral spacers that permit expansion of the assembled boards without buckling, by milling on the bottom of the groove a central longi-tudinally extending rib of triangular cross section. Spaced por-tions of the rib, of total length that is most of the length of the board, are then compressed to the level of the bottom of the groove, thereby leaving a series of relatively weak projections which serve to space the boards apart the necessary distance during assembly, but which are not strong enough to resist compres-sion upon expansion of the boards under the influence of moisture or temperature.
Description
3~L3~3 The presen~ invention relates to a tongue and groove board with spaces permitting expansion and to a method of making the same.
It is known that, in the assembly o~ tongue and groove boards, an interspace of about 1-2 mm must be maintained between what would ot~erwise be abutting surfaces of adjacent boards, in order to allow for expansion due to swelling caused by humidity or by a rise in temperature, without buckling the assembly of the boards.
In, the past,'it has been necessary to fit spacers between the boards in order to achieve this; and this is of course time consuming and e~pensive.
The present invention avoids this additional expense, by providing on what wouId otherwise be abutting surfaces of the boards, projection,s which have ~ low mechanical resistance to compression. Duri~g assembly of the boards, these projections " space the b~ards apart at the proper ,mu~ual distance, but com-', press during expansion,o,f` th,e boards t thereby preventing buckling of th,e asse~bly of boards.
In ~ccordance w:ith the broad concept of the invention, there is provided an,d claimed herein a process for making tongue and groo~e bo~ds having confronting surfaces when assembled with adjacent said boar~s, comprlsing forming on the bottom of the groove of each, said board a pluralit~ of projections which are spaced apart at their bases and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compxessing said projections rather than by buckling, in which a continuous rib is first formed on the bottom o~ the groove o~ each board, and then said projections are ~ormed fxo~ spaced portiolls of said rib.
The rib ,ma~ be formed by milling, the mill thus having pe~iphe~al V-shaped grooves if -the Xib is to be triangular.
'` ,'i ~ 1 - ' ~
.
~3~'73 The spacing of the projections is ob-tained by compressing the rib by means of a disc whic~l has a-t its periphery the contour oE -the groove without -the rib, and which has sp~cecl apart about its periphery a plurality of recesses whose peripheral extent is less th~n. th,e spacing bet~een the recesses, whereby the disc between the recesses compresses the rib to the level of the floor of the ~roo~e and leaves spaced projections at khe locations of the recesses on the disc.
In accordance With -the broad concept o the invention, the~e is al~o pxovided and cl,aimed herein a tongue and groove board having confronting surfaces when assembled with adjacent like boards, having on the bottom of the groove of each said board a plurality of projections which are spaced apart at -their bases in the direction of the length of the board and which are of such low mechanical resistance to compression that an assembly of the boards will expand by,compressing said projections rather - ' than by buckling, the interval between bases of the projections being greater than the length of the projections in the direction of the length of the board r sald intervals having been , 20 formed by compression of the material of -the board between the : projections~ .
These and other ob~ects, features and advantages of the present invention ~ill become apparent from a considera-tion ~-of the following description, t~ken in connection with the ,: accompanving drawing~ in, which:
Figr 1 is a cross~sectional view of a known t~pe of tongue and groove board;
Figure 2 is a cross-section of a board according to the present invention(. ~t an intermediate stage of manufacture, that is r ha~in~ a rib at the bott'om of the groove;
Figure 3 is a cross~sectional view taken on -the line III Qf, Fig, 2, a,nd showing t~e co~ple-ted boa,rd accordlng . ..
7~ ~
to the present invention, tha-t is, having spaced projections at the bottom oE the cJroove;
Fic~ure 4 ls a ~xac3~entar~ elevational vieW of the disc used to f~latten spaced portiorls of the rib so as to obtain spaced projections at the bottom o:,E th,e g~oove~ and F.igure 5 is a plan view~, with par-ts broken away, of an assembly of tongue and ~Xoove boa.rds accordi.ng to the presen,t inVentiQn.
Referring now to th,e ~awin,gs in greater detail, and first to Fi~. 1 thereof, th,ere is shown a cross-section o~ a board 1 of known type, gen,eral~y o~ deal, commonly çalled ~<matchboard>~,' h,aving a groove 2 extending lengthwise thereof along one edge and a tongue:3'extending length~ise thereof along the oth,er edge / ~
,, , ~ 2a - ' ~ . .
8~73 of the board.
According to the present invention, as seen in Fig. 2, groove 2 is deepened by means of a mill (not shown) modified for this purpose so as to Eorm on the bottom 2' of the groove a continuous rib 4 which is preferably of triangular cross section.
Rib 4 is then fla~tened at spaced intervals with the disc 5 shown in Fig. 4. Disc 5 has peripheral cavities 6, 6', 6"
but is otherwise of cylindrical cross~sectional configuration, these cavities being spaced apart by part~cylindrical sections 5', 5" which serve to compress rib 4 along the lines 8', 8" shown in Fig. 3, so as to leave projections 4~, 4", 41ll spaced apart from each other a distance greater than the length of the projec-tions. In other words, most of rib 4 has been flattened by disc 5.
rrhe assembly of the boards is shown in Fig. 5 By assembling two boards 1, 1' like those shown in Fig. 3, the tongue 3 of one board penetrates into the groove 2 of the other until ~; the edge 3' of the tongue comes into contact with projections 4 ', 4", etc. o the other board, the two boards 1 and 1' are automa-tically mutually spaced to provide a space 7 therebetween, that is, by a distance "d" which allows for expansion of the boards without causing buckling and without the need to use separate spacers during assembly of the boards.
Thus, when the boards expand~ for example by swelling as a result of humidity or increase in temperature, the projections 4', 4", etc. compress easily in view of their low mechanical ~- resistance to compression, and space 7 closes.
From a ~onsideration of the foregoing disclosure, therefore, it will be evident that the initially recited object of the present invention has been achieved.
Although the present invention has been described and .
~ 3~
illustrated in connection with a preferred embodiment, it is to be understood that rnodifications and variations may be resorted to without cleparting from the spirit oE -the ~n~ention, as those skilled in this art will readily understancl. ~'or example, the boards of the present invention can be not only of wood, but also ,!
of composites such as particle board or chip boarcl or the like.
Also, the projections 41, 4~, etc. can be formed instead on edge 3' of tongue 3. These and other modiEications and variations are considered to be within the purview and scope of the present in-vention as defined by the appended claims.
.
It is known that, in the assembly o~ tongue and groove boards, an interspace of about 1-2 mm must be maintained between what would ot~erwise be abutting surfaces of adjacent boards, in order to allow for expansion due to swelling caused by humidity or by a rise in temperature, without buckling the assembly of the boards.
In, the past,'it has been necessary to fit spacers between the boards in order to achieve this; and this is of course time consuming and e~pensive.
The present invention avoids this additional expense, by providing on what wouId otherwise be abutting surfaces of the boards, projection,s which have ~ low mechanical resistance to compression. Duri~g assembly of the boards, these projections " space the b~ards apart at the proper ,mu~ual distance, but com-', press during expansion,o,f` th,e boards t thereby preventing buckling of th,e asse~bly of boards.
In ~ccordance w:ith the broad concept of the invention, there is provided an,d claimed herein a process for making tongue and groo~e bo~ds having confronting surfaces when assembled with adjacent said boar~s, comprlsing forming on the bottom of the groove of each, said board a pluralit~ of projections which are spaced apart at their bases and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compxessing said projections rather than by buckling, in which a continuous rib is first formed on the bottom o~ the groove o~ each board, and then said projections are ~ormed fxo~ spaced portiolls of said rib.
The rib ,ma~ be formed by milling, the mill thus having pe~iphe~al V-shaped grooves if -the Xib is to be triangular.
'` ,'i ~ 1 - ' ~
.
~3~'73 The spacing of the projections is ob-tained by compressing the rib by means of a disc whic~l has a-t its periphery the contour oE -the groove without -the rib, and which has sp~cecl apart about its periphery a plurality of recesses whose peripheral extent is less th~n. th,e spacing bet~een the recesses, whereby the disc between the recesses compresses the rib to the level of the floor of the ~roo~e and leaves spaced projections at khe locations of the recesses on the disc.
In accordance With -the broad concept o the invention, the~e is al~o pxovided and cl,aimed herein a tongue and groove board having confronting surfaces when assembled with adjacent like boards, having on the bottom of the groove of each said board a plurality of projections which are spaced apart at -their bases in the direction of the length of the board and which are of such low mechanical resistance to compression that an assembly of the boards will expand by,compressing said projections rather - ' than by buckling, the interval between bases of the projections being greater than the length of the projections in the direction of the length of the board r sald intervals having been , 20 formed by compression of the material of -the board between the : projections~ .
These and other ob~ects, features and advantages of the present invention ~ill become apparent from a considera-tion ~-of the following description, t~ken in connection with the ,: accompanving drawing~ in, which:
Figr 1 is a cross~sectional view of a known t~pe of tongue and groove board;
Figure 2 is a cross-section of a board according to the present invention(. ~t an intermediate stage of manufacture, that is r ha~in~ a rib at the bott'om of the groove;
Figure 3 is a cross~sectional view taken on -the line III Qf, Fig, 2, a,nd showing t~e co~ple-ted boa,rd accordlng . ..
7~ ~
to the present invention, tha-t is, having spaced projections at the bottom oE the cJroove;
Fic~ure 4 ls a ~xac3~entar~ elevational vieW of the disc used to f~latten spaced portiorls of the rib so as to obtain spaced projections at the bottom o:,E th,e g~oove~ and F.igure 5 is a plan view~, with par-ts broken away, of an assembly of tongue and ~Xoove boa.rds accordi.ng to the presen,t inVentiQn.
Referring now to th,e ~awin,gs in greater detail, and first to Fi~. 1 thereof, th,ere is shown a cross-section o~ a board 1 of known type, gen,eral~y o~ deal, commonly çalled ~<matchboard>~,' h,aving a groove 2 extending lengthwise thereof along one edge and a tongue:3'extending length~ise thereof along the oth,er edge / ~
,, , ~ 2a - ' ~ . .
8~73 of the board.
According to the present invention, as seen in Fig. 2, groove 2 is deepened by means of a mill (not shown) modified for this purpose so as to Eorm on the bottom 2' of the groove a continuous rib 4 which is preferably of triangular cross section.
Rib 4 is then fla~tened at spaced intervals with the disc 5 shown in Fig. 4. Disc 5 has peripheral cavities 6, 6', 6"
but is otherwise of cylindrical cross~sectional configuration, these cavities being spaced apart by part~cylindrical sections 5', 5" which serve to compress rib 4 along the lines 8', 8" shown in Fig. 3, so as to leave projections 4~, 4", 41ll spaced apart from each other a distance greater than the length of the projec-tions. In other words, most of rib 4 has been flattened by disc 5.
rrhe assembly of the boards is shown in Fig. 5 By assembling two boards 1, 1' like those shown in Fig. 3, the tongue 3 of one board penetrates into the groove 2 of the other until ~; the edge 3' of the tongue comes into contact with projections 4 ', 4", etc. o the other board, the two boards 1 and 1' are automa-tically mutually spaced to provide a space 7 therebetween, that is, by a distance "d" which allows for expansion of the boards without causing buckling and without the need to use separate spacers during assembly of the boards.
Thus, when the boards expand~ for example by swelling as a result of humidity or increase in temperature, the projections 4', 4", etc. compress easily in view of their low mechanical ~- resistance to compression, and space 7 closes.
From a ~onsideration of the foregoing disclosure, therefore, it will be evident that the initially recited object of the present invention has been achieved.
Although the present invention has been described and .
~ 3~
illustrated in connection with a preferred embodiment, it is to be understood that rnodifications and variations may be resorted to without cleparting from the spirit oE -the ~n~ention, as those skilled in this art will readily understancl. ~'or example, the boards of the present invention can be not only of wood, but also ,!
of composites such as particle board or chip boarcl or the like.
Also, the projections 41, 4~, etc. can be formed instead on edge 3' of tongue 3. These and other modiEications and variations are considered to be within the purview and scope of the present in-vention as defined by the appended claims.
.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for making tongue and groove boards having confronting surfaces when assembled with adjacent said boards, comprising forming on the bottom of the groove of each said board a plurality of projections which are spaced apart at their bases and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compressing said projections rather than by bucking, in which a continuous rib is first formed on the bottom of the groove of each board, and then said projections are formed from spaced portions of said rib.
2. A method as claimed in claim 1, in which said spaced projections are formed by compressing the portions of the rib between the bases of said projections.
3. A process as claimed in claim 2, in which said portions of the rib between the bases of the projections are compressed by rolling along the bottom of the groove a disc that has spaced recesses in its periphery.
4. A tongue and groove board having confronting surfaces when assembled with adjacent like boards, having on the bottom of the groove of each said board a plurality of projections which are spaced apart at their bases in the direction of the length of the board and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compressing said projections rather than by buckling, the interval between bases of the projections being greater than the length of the projections in the direction of the length of the board and which are of such low mechanical resistance to compression that an assembly of the boards will expand by compressing said projections rather than by buckling, the interval between bases of the projections being greater than the length of the projections in the direction of the length of the board, said intervals having been formed by compression of the material of the board between the projections.
5. A board as claimed in claim 4, in which said projections are of triangular cross-sectional configuration.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3819/79-2 | 1979-04-23 | ||
| CH381979A CH633063A5 (en) | 1979-04-23 | 1979-04-23 | PROCEDURE FOR CREATING STRIPES INTENDED TO JOIN LATERALLY WITH INTERSPACES FOR EXPANSION AND STRIP MADE WITH THE PROCEDURE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1131873A true CA1131873A (en) | 1982-09-21 |
Family
ID=4264142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA350,398A Expired CA1131873A (en) | 1979-04-23 | 1980-04-22 | Tongue and groove boards with spacers permitting expansion, and method of making the same |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0018329B1 (en) |
| AT (1) | ATE1915T1 (en) |
| CA (1) | CA1131873A (en) |
| CH (1) | CH633063A5 (en) |
| DE (1) | DE3061198D1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453352A (en) * | 1982-08-18 | 1984-06-12 | Kaiser Aluminum & Chemical Corporation | Refractory brick with expansion allowance |
| DE3329640A1 (en) * | 1983-08-17 | 1985-02-28 | Kipptorbau Pfullendorf Gebhard Hügle GmbH & Co KG, 7798 Pfullendorf | WOOD FORMWORK FROM PROFILE BOARDS |
| NL1023678C2 (en) * | 2003-06-17 | 2004-12-20 | E Van Zanten Holding B V | Plant base. |
| DK2644478T3 (en) | 2012-03-27 | 2018-08-13 | Upm Plywood Oy | PLYWOOD PANEL |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2110729A (en) * | 1933-01-03 | 1938-03-08 | Certain Teed Prod Corp | Construction material |
| US3987599A (en) * | 1975-06-30 | 1976-10-26 | Potlatch Corporation | Wood paneling |
| FR2425306A1 (en) * | 1978-05-08 | 1979-12-07 | Pasquet Roger | Tongue and groove joint for wainscoting - includes triangular rib inside groove to be broken by tongue when panels swell and prevent warping |
-
1979
- 1979-04-23 CH CH381979A patent/CH633063A5/en not_active IP Right Cessation
-
1980
- 1980-04-18 DE DE8080810131T patent/DE3061198D1/en not_active Expired
- 1980-04-18 AT AT80810131T patent/ATE1915T1/en not_active IP Right Cessation
- 1980-04-18 EP EP80810131A patent/EP0018329B1/en not_active Expired
- 1980-04-22 CA CA350,398A patent/CA1131873A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0018329A1 (en) | 1980-10-29 |
| CH633063A5 (en) | 1982-11-15 |
| EP0018329B1 (en) | 1982-12-01 |
| DE3061198D1 (en) | 1983-01-05 |
| ATE1915T1 (en) | 1982-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |