| 摘要 |
PCT No. PCT/FI81/00011 Sec. 371 Date Oct. 8, 1981 Sec. 102(e) Date Oct. 8, 1981 PCT Filed Feb. 20, 1981 PCT Pub. No. WO81/02440 PCT Pub. Date Sep. 3, 1981.Joint for door frames or similar frame structures or sections, like window casements and frames, picture frames, etc. in which the sections that are to be jointed form an angle with each other or a direct extension to each other. On the outer or inner surfaces of these sections has been made an incision or a groove wherein a junction plate made of metal has been inserted. The junction plate is either corrugated, jagged, or toothed, whereby the effective thickness of the junction plate is made bigger or larger than the width of the groove in these sections, and such that the pressing of the junction plate into the groove causes it to be fixed in position. The inner edge of the junction plate, at least partly, comprises toothing or teeth, the teeth being pressed into the bottom of the groove at the end of the jointing. |
