| 摘要 |
662,094. Making pipes of non-metallic material. AKTIEBOLAGET BOSTADSFORSKNING. May 31, 1949 [July 1, 1948]. No. 14548/49 [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 2, 1949]. Class 99 (ii) [Also in Group X] Box girders or the like comprising four longitudinal walls 1, 2, 3, 4 are formed by moving the four walls, each preferably in a continuous strip or piece, simultaneously and preferably continuously in their longitudinal direction along converging paths controlled by guiding members so as to bring them to their respective relative positions to form the desired section, retaining the walls in this position while they are connected to each other, e.g., by glueing or by mechanical devices, and cutting the formed girder into desired lengths. Glue, with or without a hardening agent, is applied to the grooves 21 of the walls 1, 2, and/or the edges of walls 3, 4, and the walls are fed from the left, being guided by rollers 6a, 6b, and 13, 15 respectively. Walls 3, 4 are then positioned by rollers 14, 16 and walls 1, 2 thereafter guided towards walls 3, 4 by rollers 7 so that the edges of walls 3, 4 are received in the grooves 21. Walls 1, 2 are maintained at the correct distance apart by rollers 8. The girder is then guided by rollers 9 and 12 while the glue sets, and is cut into lengths at E-E. The apparatus may be surrounded by a heat insulating casing and the joints of the girder may be heated within the apparatus or the joint surfaces may be heated before they are brought together. The joining may be effected by screwing, nailing, etc. Heat and/or sound insulating material may be introduced into the hollow of the girder while the walls are being brought together. The guiding members may consist of slide bars. |
