| 摘要 |
For trimming an archway, a drywall-trimming has a nose with an outer surface and an inner surface. The outer surface has a curved portion conforming substantially to an arcuate profile with a radius in a range from approximately 1/4 inch to approximately 3/4 inch. The drywall-trimming strip has a series of slits defining a series of tabs spaced from one another along a tabbed edge but not extending into the nose. Near t he tabbed edge, the slits have widened, oblong portions. Usually, the drywall-trimming strip has a flange extending from and along an opposite edge, but the flange is omitted for some applications. A comparatively softer portion, which includes the juncture where the tabs are joined to the tabbed edge, is made from a comparatively softer, more flexible, polymeric material, such as polyvinyl chloride having a hardness of Duromete r 92 Shore A. A comparatively harder portion, which includes the flange and at least a substantial portion of the nose along the flanged edge, is made from a comparatively harder, less flexible, polymeric material, such as polyvinyl chloride having a hardness o f Durometer Shore 82 D. In one contemplated embodiment, the comparatively harder portion includes at least substantially all of the nose, except for the juncture where the ta bs are joined to thetabbed edge of the nose. In another contemplated embodiment, each of the comparatively harder and comparatively softer portions includes a substantially equal portion of the nose. The comparatively softer portion may include the entire tabs or substantially all of the tabs are made from the comparatively harder materia l except for the juncture where the tabs are joined to the tabbed edge of the nose. Becau se the comparatively softer portion includes the juncture where the tabs are joined to the tabbed edge of the nose, the outer surface of the nose of the drywall-trimming stri p tends to continue to conform substantially to an arcuate profile, even after the drywall-trimming strip has been curved so as to conform to an archway. |
