CA2004699A1 - Drywall tape - Google Patents
Drywall tapeInfo
- Publication number
- CA2004699A1 CA2004699A1 CA 2004699 CA2004699A CA2004699A1 CA 2004699 A1 CA2004699 A1 CA 2004699A1 CA 2004699 CA2004699 CA 2004699 CA 2004699 A CA2004699 A CA 2004699A CA 2004699 A1 CA2004699 A1 CA 2004699A1
- Authority
- CA
- Canada
- Prior art keywords
- backing
- strip
- base strip
- tape
- adhesive layer
- 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
Links
Landscapes
- Laminated Bodies (AREA)
Abstract
A drywall tape is made of a paper base strip provided with pressure sensitive adhesive (PSA) backed by a split backing to facilitate application of the tape at corners. In order to eliminate the problem of cracks developing at the edge of paper tapes having a PSA layer and used with water based compounds, the tape is perforated. Two preferred ways of perforation are described. The advance in the art is in providing a substitute for known paper tapes and glass fibre mesh tapes, retaining their advantages but eliminating or at least reducing their drawbacks.
Description
20~6~9 The present invention relates to wallboard tapes used in covering joints between adjacent drywall panels. The tapes of this type have long been used in drywall constructions to produce a smooth joint between abutting wall board panels, suitable for subsequent painting or wall papering.
In a typical application, the dr~wall panels are nailed to the studs such that the panels abut or are closely spaced from each other at the area of the stud. It i6 impossible to avoid cracks between the edges of adjacent panels and the wallboard tape is one of the elements used in providing a smooth transition over such crack.
The cracks are usually filled by a crack filling substance.
This is known to be done by two distinct methods. Both of them use a reinforcing tape. Merely filling the crack between two gypsum boards with a plaster of caulking compound would eventually result in a new crack. This is due to ~tructural movements in walls and ceilings which occur for a variety of reasons. The use of a reinforcing tape or some similar product is , therefore inevitable.
The first, and by far the most prevalent method of taping and filling the cracks, utilizes a paper tape devoid of adhesive coating. The tape is supplied in rolls about 2" wide. It is cemented over the joint utilizing drywall joint compound as the cement or adhesive US Patent 2,814,080, Tvorik et al, presents an example of the method. This procedure is known as "taping joints".
The drywall joint compound used in securing the tape to the joint comes in two basic forms. The first is a water based air drying compound which dries and sets as a consequence of evaporation of water which is one of its constituents. Such drying is a lengthy procedure which takes about 12 - 24 hours before the joint may be top coated by paint or the like. The second group of compounds used in securing the paper tape sets chemically, as a result of a chemical reaction. The chemically setting joint compounds are usually plaster based. They set in about 15 minutes to a few hours and can then be top coated. One of the disadvantages of this second group is in that the application is messy. Furthermore, it requires relatively _ ~ _ Z~O~G~
accurate estimates of time within whioh to apply the given batch of the compound b~fore it begins to set. The final product is difficult to ~and. The advantage of chemically setting substance6 is in that they are tougher and less likely than the water ba~ed substances to develop cracks again.
From the standpoint of the pre~ent invention, it ~hould be noted that in the first method the reinforcing tape i~ a plaln paper tape devoid of an adhssive or the like coating.
The crack filling compound i8 not lnstrumental for holding a reinforcing tape in place in the ~econd known method, wherein an open me6h of gla~ fibre ~S Patont 4.5~2~Q04- E~aDs st al.. or a paper tape S Pa~eat 4.042.739. E~l et 1 is coated with a pressure aensitive glue and i8 applied over the crack prior to the application of the crack filling ~ubstance. Im~edi~tely after the application of euch reinforcing tape, either of the two ~oint compounds can be appl~ed over and through the me~h of the tape to fill in the crack. The glass fibre scrlm iB provided with a pressure sensitive adhesive layer. The tape i8 adhered to drywalls over 2 joint, then the joint compound is applied over the mesh. The compound passes directly through the mesh and bonds to the edges of the adjacent drywall panel~. If the paper tape i6 used, the compound stAys only on the 6urface of the tape and of the ad~acent drywall panelfi.
It iB noteworthy that the manufacturers of the glass fibre reinforcing tapes recommend the use of the tape with chemically setting compound~, mainly for the reason that they provide a tougher joint wh~ch is les~ likely to impair the final product by recurrence of the cracking which occurs within and beyond the mesh of glass fibre. The cost of the glags fibre mesh is relatively high. The use of the chemically setting compounds i~
di 8 advantageous for reasons 9xpl ained above.
Attempts have been made to alleviate the problsms as~oclated with the use of the glass fibre ~esh by using a paper tape with pres~ure sensitive adhe~ive. The bonding of the t~pe to drywall panels was improved. However, it was di~covered that cracka tand to occur at the edge~ of the tape when the ~oint compound dries.
This was found to be the case particularly when the tape was used in conjun¢tion with the otherwise preferred water based joint
In a typical application, the dr~wall panels are nailed to the studs such that the panels abut or are closely spaced from each other at the area of the stud. It i6 impossible to avoid cracks between the edges of adjacent panels and the wallboard tape is one of the elements used in providing a smooth transition over such crack.
The cracks are usually filled by a crack filling substance.
This is known to be done by two distinct methods. Both of them use a reinforcing tape. Merely filling the crack between two gypsum boards with a plaster of caulking compound would eventually result in a new crack. This is due to ~tructural movements in walls and ceilings which occur for a variety of reasons. The use of a reinforcing tape or some similar product is , therefore inevitable.
The first, and by far the most prevalent method of taping and filling the cracks, utilizes a paper tape devoid of adhesive coating. The tape is supplied in rolls about 2" wide. It is cemented over the joint utilizing drywall joint compound as the cement or adhesive US Patent 2,814,080, Tvorik et al, presents an example of the method. This procedure is known as "taping joints".
The drywall joint compound used in securing the tape to the joint comes in two basic forms. The first is a water based air drying compound which dries and sets as a consequence of evaporation of water which is one of its constituents. Such drying is a lengthy procedure which takes about 12 - 24 hours before the joint may be top coated by paint or the like. The second group of compounds used in securing the paper tape sets chemically, as a result of a chemical reaction. The chemically setting joint compounds are usually plaster based. They set in about 15 minutes to a few hours and can then be top coated. One of the disadvantages of this second group is in that the application is messy. Furthermore, it requires relatively _ ~ _ Z~O~G~
accurate estimates of time within whioh to apply the given batch of the compound b~fore it begins to set. The final product is difficult to ~and. The advantage of chemically setting substance6 is in that they are tougher and less likely than the water ba~ed substances to develop cracks again.
From the standpoint of the pre~ent invention, it ~hould be noted that in the first method the reinforcing tape i~ a plaln paper tape devoid of an adhssive or the like coating.
The crack filling compound i8 not lnstrumental for holding a reinforcing tape in place in the ~econd known method, wherein an open me6h of gla~ fibre ~S Patont 4.5~2~Q04- E~aDs st al.. or a paper tape S Pa~eat 4.042.739. E~l et 1 is coated with a pressure aensitive glue and i8 applied over the crack prior to the application of the crack filling ~ubstance. Im~edi~tely after the application of euch reinforcing tape, either of the two ~oint compounds can be appl~ed over and through the me~h of the tape to fill in the crack. The glass fibre scrlm iB provided with a pressure sensitive adhesive layer. The tape i8 adhered to drywalls over 2 joint, then the joint compound is applied over the mesh. The compound passes directly through the mesh and bonds to the edges of the adjacent drywall panel~. If the paper tape i6 used, the compound stAys only on the 6urface of the tape and of the ad~acent drywall panelfi.
It iB noteworthy that the manufacturers of the glass fibre reinforcing tapes recommend the use of the tape with chemically setting compound~, mainly for the reason that they provide a tougher joint wh~ch is les~ likely to impair the final product by recurrence of the cracking which occurs within and beyond the mesh of glass fibre. The cost of the glags fibre mesh is relatively high. The use of the chemically setting compounds i~
di 8 advantageous for reasons 9xpl ained above.
Attempts have been made to alleviate the problsms as~oclated with the use of the glass fibre ~esh by using a paper tape with pres~ure sensitive adhe~ive. The bonding of the t~pe to drywall panels was improved. However, it was di~covered that cracka tand to occur at the edge~ of the tape when the ~oint compound dries.
This was found to be the case particularly when the tape was used in conjun¢tion with the otherwise preferred water based joint
2~0~
compound.
It is an object of the present invention to further advancethe art of reinforcement tapes for drywall joints and, in particular, to provide advantages of both of the paper and glass S fibre me6h tapes while eliminating or at least reducing most of their disadvantages.
In general terms and in one aspect thereof, the invention provides a wallboard tape for covering the joint between ad;acent drywall panels, said wallboard tape comprising: (a) an elongated base strip made from paper and having two opposed side edges defining the width of the base strip; (b) one face of the base strip ~eing provided with an adhesive layer of a pres~ure sensitive adhesive; (c) the layer of pres6ure 6ensitive adhesive being covered with a peel-off backing strip means; (d) the base strip being provided with perforations disposed in a pattern extending over the entire length of the base strip.
In another aspect but still defining the invention in general terms, a wallboard tape is provided for covering the joint between adjacent drywall panels, said wallboard tape . 20 comprising: (a) an elongated ba~e strip made from paper and having two opposed side edges defining the width of the base ! strip; (b) one face of the base 6trip being provided with an layer of a pressure sensitive adhesive; (c) the adhesive layer being covered with a peel-off backing sheet means; (d) said peel-off backing sheet means including a first portion and a 6econd portion; (e) 6aid first and second portion covering each ,a part of the adhesive layer extending along one of the side edges of the base; (f) backing ~eparation means a6~0ciated with said backing sheet means to allow removal of one of said portions while leaving the other portion applied to the respective part of ~ the adhesive layer.
The invention will now be described by way of two preferred embodiments with reference to the accompanying diagrammatic, drawings. For the sake of more clearly showing the features of the invention, the drawing~ are not to scale, particularly in cross-sectional representations. In the drawings:
Figure 1 is a top plan view of a first embodiment of the invention;
X~46~3~
Figure 2 i6 6ection II-II of Figure 1;
Figure 3 i6 a top plan view of a 6econd embodiment of the invention; and Figure 4 i6 6ection IV-IV or Figure 3.
Turning fir~tly to the embodiment of Fig6. 1 and 2, reference numeral 10 generally denotes a wallboard tape. The tape 10 has infinite length and includes an elongated base strip 11 made of drywall joint paper. The width of the tape is about 2"
and the thickness of the paper base i8 about .005" to about .010". The underside of the ba6e strip 11 as viewed in Figure 2 is provided with a layer 12 of pressure 8 ensitive adhesive (PSA).
Typically, the adhesive is polymeric adhesive. It usually cover6 the entire undersurface of the ba6e strip even though two 6eparate 6tripes, one along each edge of the base strip 11 would also be acceptable.
The layer 12 of the PSA is covered by a peel-off backing sheet means generally designated with reference numeral 13. The backing 6heet 13 has a centrally disposed, longitudinally extending line of weakne66 1~ which subdivides the backing 6heet means 13 into a fir6t portion 15 and a second portion 16.
The outside edges 17, 18 of the backing sheet portions 15, 16 are disposed slightly beyond the adjacent 6ide edges 19, 20 of the base strip 11.
Each of the first and 6econd portion6 15, 16, covers that part of the adhesive layer 12 which is disposed along one of the 6ide edges .
~ he line of weakne66 14 i6 coincident with the longitudinal axis of the tape. It allow6 removal of one portion 15 of the backing strip while the other portion 16 may remain in place for a sub6equent removal.
-- The base 6trip 11 is provided with perforation. The repre6entation of Figure 1 pre6entæ a preferred pattern of the perforation for the purpose of providing the object of the pre6ent invention.
The perforation ha6 a central part 21 which extends centrally of the tape and is formed by a 6ingle row of equidi6tantly spaced circular openings 22 having the diameter of about 3/16". The 6pacing of the centre6 of the openings 22 i6 4~
about 1/2~.
The perforation further include6 two 6ide parts ~3 and 24 both of which are compri6ed of 6maller diameter (about 1/8") circular openings. One side part 23 i8 di6posed along one edge l9, of the ba6e 6trip 11 in a zig-zag pattern. The width of the pattern i6 about 5/16~'. The spacing between openings ~ or 26 adjacent in the direction parallel with elongation of the tape i8 about 3/8".
Another embodiment of the invention i~ ~hown in Figs. 3 and 4. Here, again, the tape 30 ha6 a paper base ctrip ~1 Of the structure generally corresponding to that of the fir6t embodiment. The base sheet i8 likewise provided with a PSA layer 32 which i6 covered over by peel-off backing trip means cumulatively decignated with reference numeral ~. A6 in the first embodiment, the backing 6trip mean6 33 i6 6ubdivided into two portion6 34 and ~. Contrary to the arrangement of Fig. 4, ; the portion 35 overlaps portion 34 at the centre of the tape 30.
The protection of the outer edges of the portion6 34 and 35 beyond the respective side edge6 of the paper tape 31 i8 imilar to that of the fir6t embodiment described.
The 6econd embodiment i8 intended to show that other wayQ of ;l a 6plit backing of the base 6trip and a different perforation can be made without departing from the ~cope of the invention.
In Fig6. 3 and 4, the ba6e 6trip 31 i6 provided with tiny perforations 36 di6po6ed in an equidi6tant pattern over the width of the tape 30. They pre6ent another embodiment or perforation , producing the de6ired result.
The seaond embodiment utilize6, in addition to the line of weakne6s provided by the 6plit of ths backing, a crea6e line 37
compound.
It is an object of the present invention to further advancethe art of reinforcement tapes for drywall joints and, in particular, to provide advantages of both of the paper and glass S fibre me6h tapes while eliminating or at least reducing most of their disadvantages.
In general terms and in one aspect thereof, the invention provides a wallboard tape for covering the joint between ad;acent drywall panels, said wallboard tape comprising: (a) an elongated base strip made from paper and having two opposed side edges defining the width of the base strip; (b) one face of the base strip ~eing provided with an adhesive layer of a pres~ure sensitive adhesive; (c) the layer of pres6ure 6ensitive adhesive being covered with a peel-off backing strip means; (d) the base strip being provided with perforations disposed in a pattern extending over the entire length of the base strip.
In another aspect but still defining the invention in general terms, a wallboard tape is provided for covering the joint between adjacent drywall panels, said wallboard tape . 20 comprising: (a) an elongated ba~e strip made from paper and having two opposed side edges defining the width of the base ! strip; (b) one face of the base 6trip being provided with an layer of a pressure sensitive adhesive; (c) the adhesive layer being covered with a peel-off backing sheet means; (d) said peel-off backing sheet means including a first portion and a 6econd portion; (e) 6aid first and second portion covering each ,a part of the adhesive layer extending along one of the side edges of the base; (f) backing ~eparation means a6~0ciated with said backing sheet means to allow removal of one of said portions while leaving the other portion applied to the respective part of ~ the adhesive layer.
The invention will now be described by way of two preferred embodiments with reference to the accompanying diagrammatic, drawings. For the sake of more clearly showing the features of the invention, the drawing~ are not to scale, particularly in cross-sectional representations. In the drawings:
Figure 1 is a top plan view of a first embodiment of the invention;
X~46~3~
Figure 2 i6 6ection II-II of Figure 1;
Figure 3 i6 a top plan view of a 6econd embodiment of the invention; and Figure 4 i6 6ection IV-IV or Figure 3.
Turning fir~tly to the embodiment of Fig6. 1 and 2, reference numeral 10 generally denotes a wallboard tape. The tape 10 has infinite length and includes an elongated base strip 11 made of drywall joint paper. The width of the tape is about 2"
and the thickness of the paper base i8 about .005" to about .010". The underside of the ba6e strip 11 as viewed in Figure 2 is provided with a layer 12 of pressure 8 ensitive adhesive (PSA).
Typically, the adhesive is polymeric adhesive. It usually cover6 the entire undersurface of the ba6e strip even though two 6eparate 6tripes, one along each edge of the base strip 11 would also be acceptable.
The layer 12 of the PSA is covered by a peel-off backing sheet means generally designated with reference numeral 13. The backing 6heet 13 has a centrally disposed, longitudinally extending line of weakne66 1~ which subdivides the backing 6heet means 13 into a fir6t portion 15 and a second portion 16.
The outside edges 17, 18 of the backing sheet portions 15, 16 are disposed slightly beyond the adjacent 6ide edges 19, 20 of the base strip 11.
Each of the first and 6econd portion6 15, 16, covers that part of the adhesive layer 12 which is disposed along one of the 6ide edges .
~ he line of weakne66 14 i6 coincident with the longitudinal axis of the tape. It allow6 removal of one portion 15 of the backing strip while the other portion 16 may remain in place for a sub6equent removal.
-- The base 6trip 11 is provided with perforation. The repre6entation of Figure 1 pre6entæ a preferred pattern of the perforation for the purpose of providing the object of the pre6ent invention.
The perforation ha6 a central part 21 which extends centrally of the tape and is formed by a 6ingle row of equidi6tantly spaced circular openings 22 having the diameter of about 3/16". The 6pacing of the centre6 of the openings 22 i6 4~
about 1/2~.
The perforation further include6 two 6ide parts ~3 and 24 both of which are compri6ed of 6maller diameter (about 1/8") circular openings. One side part 23 i8 di6posed along one edge l9, of the ba6e 6trip 11 in a zig-zag pattern. The width of the pattern i6 about 5/16~'. The spacing between openings ~ or 26 adjacent in the direction parallel with elongation of the tape i8 about 3/8".
Another embodiment of the invention i~ ~hown in Figs. 3 and 4. Here, again, the tape 30 ha6 a paper base ctrip ~1 Of the structure generally corresponding to that of the fir6t embodiment. The base sheet i8 likewise provided with a PSA layer 32 which i6 covered over by peel-off backing trip means cumulatively decignated with reference numeral ~. A6 in the first embodiment, the backing 6trip mean6 33 i6 6ubdivided into two portion6 34 and ~. Contrary to the arrangement of Fig. 4, ; the portion 35 overlaps portion 34 at the centre of the tape 30.
The protection of the outer edges of the portion6 34 and 35 beyond the respective side edge6 of the paper tape 31 i8 imilar to that of the fir6t embodiment described.
The 6econd embodiment i8 intended to show that other wayQ of ;l a 6plit backing of the base 6trip and a different perforation can be made without departing from the ~cope of the invention.
In Fig6. 3 and 4, the ba6e 6trip 31 i6 provided with tiny perforations 36 di6po6ed in an equidi6tant pattern over the width of the tape 30. They pre6ent another embodiment or perforation , producing the de6ired result.
The seaond embodiment utilize6, in addition to the line of weakne6s provided by the 6plit of ths backing, a crea6e line 37
- 3~ in the ba6e 6trip 31. The line 37 further facilitate6 the - folding of the tapa along the longitudinal axi6 to provide for convenient application of the tape at the corner6.
In use, the tape i8 applied to a joint in the 6ame fashion a6 the known glas6 fiber me6h, as de6cribed above. When working with the fir6t embodiment, the joint compound can be trowelled over the tape and through the perforation6 into the gap between the adjacent boards. The second embodiment is 6uitable in in6tallation6 whsre it i6 de6ired to apply the ~oint compound 2~)0~
only over the 6urface of the tape without the need for filling the gap between the panel 6 .
The split backing 6h0et 13, 33 prs~ents added convenience ln applying the tape in the corners, between two abutting panels disposed at right angles to each other. The tape i8 first folded upon itself along the centreline, with the backing out. One of the two backing portions 15 - 16 or 34 - 35 i6 then stripped off to expose the re6pective stripe of the adhe~lve layer 12, 32.
The tape thus preformed iB then applied to one of the two drywall panels. Then the second backing portion 16 - 15 or 35 -34 can be removed and the second half of the tape applied to the other board by simply unfolding the tape. The crease line 37 provides added convenience in thi6 re6pect. However, the embodiment of Figures 1 and 2 i8 no less convenient to fold, apparently due to ths line 14 of weaknesR in the backing sheet 13.
~ hose skilled in the art will appreciate that the described embodiments may be further modified within the 6pirit of the present invention. Accordingly, we wish to protect by letters patent which may is6ue on the present application all such embodiments as reasonably fall within the scope of our contribution to the art.
In use, the tape i8 applied to a joint in the 6ame fashion a6 the known glas6 fiber me6h, as de6cribed above. When working with the fir6t embodiment, the joint compound can be trowelled over the tape and through the perforation6 into the gap between the adjacent boards. The second embodiment is 6uitable in in6tallation6 whsre it i6 de6ired to apply the ~oint compound 2~)0~
only over the 6urface of the tape without the need for filling the gap between the panel 6 .
The split backing 6h0et 13, 33 prs~ents added convenience ln applying the tape in the corners, between two abutting panels disposed at right angles to each other. The tape i8 first folded upon itself along the centreline, with the backing out. One of the two backing portions 15 - 16 or 34 - 35 i6 then stripped off to expose the re6pective stripe of the adhe~lve layer 12, 32.
The tape thus preformed iB then applied to one of the two drywall panels. Then the second backing portion 16 - 15 or 35 -34 can be removed and the second half of the tape applied to the other board by simply unfolding the tape. The crease line 37 provides added convenience in thi6 re6pect. However, the embodiment of Figures 1 and 2 i8 no less convenient to fold, apparently due to ths line 14 of weaknesR in the backing sheet 13.
~ hose skilled in the art will appreciate that the described embodiments may be further modified within the 6pirit of the present invention. Accordingly, we wish to protect by letters patent which may is6ue on the present application all such embodiments as reasonably fall within the scope of our contribution to the art.
Claims (11)
1. A wallboard tape for covering the joint between adjacent drywall panels, said wallboard tape comprising:
(a) an elongated base strip made from paper and having a first side edge and a second side edge, said first and second edges defining the width of the base strip;
(b) one face of the base strip being provided with a layer of pressure sensitive adhesive;
(c) the layer being covered with a peel-off backing sheet means;
(d) said backing sheet means including a first portion and a second portion;
(e) said first portion covering a part of the adhesive layer extending along the first side edge of the base strip, said second portion covering a part of the adhesive layer extending along the the second side edge of the base strip;
(f) backing separation means associated with said backing sheet means to allow removal of said first portion while leaving the second portion applied over the respective part of the adhesive layer.
(a) an elongated base strip made from paper and having a first side edge and a second side edge, said first and second edges defining the width of the base strip;
(b) one face of the base strip being provided with a layer of pressure sensitive adhesive;
(c) the layer being covered with a peel-off backing sheet means;
(d) said backing sheet means including a first portion and a second portion;
(e) said first portion covering a part of the adhesive layer extending along the first side edge of the base strip, said second portion covering a part of the adhesive layer extending along the the second side edge of the base strip;
(f) backing separation means associated with said backing sheet means to allow removal of said first portion while leaving the second portion applied over the respective part of the adhesive layer.
2. The wallboard tape of claim 1 wherein the first and second portions cover each about one-half of the width of the base strip.
3. The wallboard tape of claim 1 or 2 wherein the backing separation means is a line of weakness extending longitudinally centrally of the base strip and separating the backing sheet means into two generally identical strip sections, whereby the backing separation means forms a centrally disposed longitudinal line of weakness of the backing sheet means.
4. The wallboard tape of claim 3 wherein each portion of the backing sheet means is wider than an associated stripe of the adhesive layer and projects beyond the respective edge of the base strip.
5. The wallboard tape of claim 1 wherein the base strip is perforated.
6. A wallboard tape for covering the joint between adjacent drywall panels, said wallboard tape comprising:
(a) an elongated base strip made from paper and having two opposed side edges defining the width of the base strip;
(b) one face of the base strip being provided with an adhesive layer of a pressure sensitive adhesive;
(c) the layer of pressure sensitive adhesive being covered with a peel-off backing strip means;
(d) the base strip being provided with perforations disposed in a pattern extending over the entire length of the base strip.
(a) an elongated base strip made from paper and having two opposed side edges defining the width of the base strip;
(b) one face of the base strip being provided with an adhesive layer of a pressure sensitive adhesive;
(c) the layer of pressure sensitive adhesive being covered with a peel-off backing strip means;
(d) the base strip being provided with perforations disposed in a pattern extending over the entire length of the base strip.
7. The wallboard tape of claim 6, wherein the perforations extend along a central region of the base strip at a generally equidistant spacing from each side edge.
8. The wallboard tape of claim 7, wherein further perforations form a second and third perforated area, each of said perforated areas extending along and near one of the side edges.
9. The wallboard tape of one of claims 6, 7 or 8, wherein the backing strip means includes a first backing strip portion and a second backing strip portion covering each a part of the adhesive layer extending along one of the side edges of the base strip.
10. The wallboard tape of one of claims 6, 7 or 8, wherein the backing strip means includes a first backing strip portion and a second backing strip portion covering each a part of the adhesive layer extending along one of the side edges of the base strip, the backing strip means being provided with backing separation means adapted to allow removal of said said first backing strip portion while leaving the second backing strip portion applied to the respective part of the adhesive layer.
11. The wallboard tape of one of claims 6, 7 or 8, wherein the backing strip means includes a first backing strip portion and a second backing strip portion covering each a part of the adhesive layer extending along one of the side edges of the base strip, the backing strip means being provided with a centrally longitudinally extending line of separation adapted to allow removal of said said first backing strip portion while leaving the other portion applied to the respective part of the adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2004699 CA2004699A1 (en) | 1989-12-06 | 1989-12-06 | Drywall tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2004699 CA2004699A1 (en) | 1989-12-06 | 1989-12-06 | Drywall tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2004699A1 true CA2004699A1 (en) | 1991-06-06 |
Family
ID=4143728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2004699 Abandoned CA2004699A1 (en) | 1989-12-06 | 1989-12-06 | Drywall tape |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2004699A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11976475B2 (en) | 2019-11-08 | 2024-05-07 | Certainteed Gypsum, Inc. | Pressure sensitive adhesive joint support |
-
1989
- 1989-12-06 CA CA 2004699 patent/CA2004699A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11976475B2 (en) | 2019-11-08 | 2024-05-07 | Certainteed Gypsum, Inc. | Pressure sensitive adhesive joint support |
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