INSIDE CORNER PROFILE FOR DRYWALL INSTALLATION

Abstract

An inside corner profile for providing a low-maintenance expansion joint in a space that is at least partially designed with flat structural elements, the cross section of the inside corner profile having a long leg on the back and a short leg on the front, as well as a web that connects the short leg and the long leg, the web being extended beyond the attachment point of the short leg and the web extension having a shadow gap on the back side of its end portion is disclosed.

Also disclosed is a use of the inside corner profile in drywall construction using gypsum plaster board panels.

Claims

1. An inside corner profile for providing a low-maintenance expansion joint in a space at least partially designed with flat structural elements, the cross section of the inside corner profile having: a long leg on the back; and a short leg on the front; as well as a web that connects the short leg and the long leg; the web is extended beyond the attachment point of the short leg; and the web extension has a shadow gap on the back side of its end portion.

2. The inside corner profile according to claim 1, wherein the web extension has at least one bevel on the back side of its end portion to form the shadow gap.

3. The inside corner profile according to claim 1, wherein the web extension has at least one rabbet on the back of its end portion to form the shadow gap.

4. The inside corner profile according to claim 1, wherein the web extension on the back of its end portion to form the shadow gap has: at least one bevel; and at least one rabbet.

5. The inside corner profile according to claim 1, wherein the front corner region formed by the front side of the short leg and the top side of the web extension has a triangular cross section.

6. The inside corner profile according to claim 1, wherein the front corner region formed by the front side of the short leg and the top side of the web extension has a concave shape on the outside in cross section.

7. The inside corner profile according to claim 1, wherein the front corner region formed by the front side of the short leg and the top side of the web extension has a convex shape on the outside in cross section.

8. The inside corner profile according to claim 1, wherein the short leg has a second shadow gap, on the back side of its end portion which is designed as a bevel and/or as a rabbet.

9. The inside corner profile according to claim 1, wherein the surface of the shadow gap has a coating which reduces the adhesion of a paint to the inside corner profile.

10. The inside corner profile according to claim 1, wherein the web has a recess and/or a notch running along the longitudinal axis of the profile on the outside on the portion located between the long leg and the short leg.

11. The inside corner profile according to claim 1, wherein the length of the web is such that the inside length of the web corresponds to the thickness of the flat structural elements used or is slightly less than the thickness of the flat structural elements used, so that the inside corner profile rests against the edge region of a flat structural element with a slight clamping tension after it has been snapped on.

12. The inside corner profile according to claim 1, wherein an adhesive strip having a protective strip or an adhesive tape with a foam intermediate layer is prefixed in the recess.

13. The inside corner profile according to claim 1, wherein the long web has a plurality of needle-like elevations and/or a plurality of pointed elevations having a barbed hook spaced apart from one another on the inside.

14. The inside corner profile according to claim 1, wherein the inside corner profile is made of a plastic or aluminum.

15. A use of an inside corner profile according to claim 1 for construction of a drywall construction wall.

Description

EXPLANATION OF THE FIGURES

[0077] FIGS. 1 to 6 are intended to illustrate possible preferred embodiments and variants of the invention and their advantages without restricting the invention in any form.

[0078] FIG. 1 shows the inside corner profile 10 in cross section. The web 40 connects the long leg 20 to the short leg 30 and thus forms a receptacle, U-shaped in cross section, for the edge portion of a gypsum plaster board panel. The web 40 is extended beyond the attachment point 31 of the short leg 30. The web extension 41 has a shadow gap 43 on the back side of its end portion 42. The shadow gap 43 is designed in the form of a bevel and has a correspondingly flat (planar) shape.

[0079] FIG. 2a shows the inside corner profile 10, which rests with the long leg 20 and the short leg 30 and the front side of the web 40 on the edge portion of a gypsum plaster board panel. The web 40 connects the long leg 20 to the short leg 30 and thus forms a receptacle, U-shaped in cross section, for the edge portion of a gypsum plaster board panel. The web 40 is extended beyond the attachment point 31 of the short leg 30. The web extension 41 has a shadow gap 43 on the back side of its end portion 42.

[0080] The paint application of the interior decoration (emulsion paint) terminates in the region of the shadow gap 43, so that the contact region between the plastic of the inside corner profile 10 and the emulsion paint is visually covered by the web extension 41. The aforementioned contact region relates to the possible color break line (color break edge).

[0081] The back of the web 40 and the back of the web extension 41 rest against a second gypsum plaster board panel. The double arrows in the cross section of the two gypsum plaster board panels illustrate the possible direction of movement of the panels. A movement of the panels can occur, for example, when exposed to thermal expansion or when the wall structure is subjected to mechanical stress.

[0082] The web extension 41 has a shadow gap 43 on the back side of its end portion 42. The shadow gap 43 is embodied in FIG. 2a as a rounded bevel, i.e., in the embodiment shown, the outer side of the bevel is not planar, but rather curved inward.

[0083] The break edge of an emulsion paint applied to the inside of the room is visually covered by the shadow gap 43, so that any crack formation is less clearly detectable or not detectable at all for the viewer standing in the interior.

[0084] The web 40 has a groove-like recess 60 on the outside. The recess 60 is used to receive an adhesive (not shown) which allows the (possibly stretchable) fixing of the outside of the inside corner profile 10 to the second gypsum plaster board panel.

[0085] FIG. 2b shows the inside corner profile 10 from FIG. 2a in cross section. The cross section clearly shows that the shadow gap 43 on the back of the web extension 41 in the example shown is designed in the form of a curved bevel, i.e. the outside of the bevel has a correspondingly curved course.

[0086] The cross section also clearly shows that a further bevel 44 can also be arranged on the inside end portion of the short leg 30. This second shadow gap, designed as a bevel 44, does not have a rounded, but rather a planar outer side.

[0087] The additional bevel 44 has the same effect with regard to the perceptibility of a color break as the first shadow gap 43 against the end portion of the leg extension 41.

[0088] FIG. 3 shows a further variant of the inside corner profile 10. The inside corner profile 10 shown has an essentially triangular cross section in the front corner region 50 formed by the front side of the short leg 30 and the front side of the web extension 41.

[0089] FIG. 4a shows an inside corner profile 10 in an alternative embodiment. The inside corner profile 10 is characterized in that the shadow gap 43 on the back side of the end portion 42 of the web extension 41 has a rabbet 45 in combination with two bevels 44.

[0090] The rabbet 45 covers the break edge of the emulsion paint over a larger region, so that a possible crack formation is even less noticeable for the viewer standing in the interior.

[0091] FIG. 4b shows the inside corner profile 10 from FIG. 4a in cross section, the stepped course of the shadow gap 43 becoming clearer. The stepped cross section results from the combination of a first bevel 44, a central rabbet 45 and a second bevel 44.

[0092] This alternative embodiment is considered to be particularly advantageous if the inside corner profile 10 is repeatedly painted over with emulsion paint as part of a repetitive room renovation (maintenance). The application of paint increases with each coat. The step- shaped cross section of the shadow gap provides at least two predefined color break lines with the two mutually offset bevels.

[0093] FIG. 5 shows an inside corner profile 10, which in the front corner region 50 formed by the front side of the short leg 30 and the top side of the web extension 41 has an inwardly curved profile (groove) in cross section.

[0094] In the example shown, the web 40 has a notch 61 instead of a groove-like recess for receiving adhesive. The notch 61 runs in the longitudinal direction of the profile and facilitates the expansion of the profile 10 when said profile is arranged on the edge-side portion of a gypsum plaster board panel. The expansion of the profile is deliberately made more difficult in that the length of the web 40 is dimensioned in such a way that the length of the web 40 on the inside directly or just corresponds to the thickness of the flat structural elements used. As a result, the inside corner profile rests against the edge region of a gypsum plaster board panel with a slight clamping tension.

[0095] FIG. 6 shows an inside corner profile 10, which is characterized in that the end portion of the short leg 30 tapers to a point and does not have a second shadow gap. This embodiment is preferred if the gypsum plaster board panel and the U-shaped receptacle, which is formed by the web 40, which connects the long leg 20 and the short leg 30 to one another, are connected to the inside corner profile 10 by means of adhesive or by mechanical fastening means.

[0096] In the embodiment shown in FIG. 6 the inside corner profile has a plurality of needle-like, pointed elevations on the inner side of the long leg. After insertion of a gypsum plaster board the needle-like, pointed elevations will penetrate the surface of the gypsum plaster board panel for an even better fastening of the profile to the edge portion of the panel.

[0097] In this case, the probability of a later expansion movement of the gypsum plaster board panel in relation to the inside corner profile is lower, so that a color break on the tapering end portion of the short leg 30 is less likely. For this reason, an additional shadow gap on the back end portion of the short leg 30 is not required.

[0098] Furthermore, the inside corner profile shown in FIG. 6 is characterized in that the web 40 has the same thickness throughout.

LIST OF REFERENCE SIGNS

[0099] 10 Inside corner profile [0100] 20 Long leg [0101] 30 Short leg [0102] 31 Starting point of the short leg [0103] 40 Web [0104] 41 Web extension [0105] 42 End portion of the web extension [0106] 43 Shadow gap [0107] 44 Bevel [0108] 45 Rabbet [0109] 50 Corner region [0110] 60 Recess (groove) [0111] 61 Notch [0112] 62 Needle or pointed elevation with a barbed hook