公开(公告)号：US4781089A

公开(公告)日：1988-11-01

申请号：US757091

申请日：1985-07-19

申请人： Gerard Gerber ,  Andre Leblond

发明人： Gerard Gerber ,  Andre Leblond

IPC分类号： B26D1/00 ,  B23D21/02 ,  B26D3/00 ,  B26D3/16 ,  F16L59/10 ,  B26D1/04

CPC分类号： F16L59/10 ,  B26D3/001 ,  Y10T83/0333 ,  Y10T83/0581 ,  Y10T83/0596 ,  Y10T83/398

摘要： Method for longitudinal cutting of a wall of a fibrous tubular product in a step shaped profile. The apparatus comprises two parallel main blades which form radial cuts into the wall, slightly displaced from each other. One cut is made radially inward from the outer surface; and the other cut is made radially outward from the inner surface. Each cut extends toward the center of the shell wall to a depth approximately one half the thickness of the shell wall. A third cut is made within the shell wall perpendicular to and joining the other two cuts. These three cuts form a smooth step shaped cut through the wall and facilitate installation of the shell around conduit while minimizing heat loss and mechanical stresses within the wall.

摘要翻译： 用于以阶梯形轮廓纵向切割纤维状管状产品的壁的方法。 该装置包括两个平行的主叶片，其形成径向切割成壁，彼此稍微偏移。 一个切口从外表面径向向内制成; 并且另一个切口从内表面径向向外制成。 每个切口朝着壳壁的中心延伸到壳壁的厚度的大约一半的深度。 在垂直于并连接其他两个切口的壳壁内进行第三切割。 这三个切口通过壁形成平滑的台阶形切口，并且便于壳体围绕导管的安装，同时最小化壁内的热损失和机械应力。