| 摘要 |
PCT No. PCT/GB93/02057 Sec. 371 Date Jun. 3, 1994 Sec. 102(e) Date Jun. 3, 1994 PCT Filed Oct. 4, 1993 PCT Pub. No. WO94/07620 PCT Pub. Date Apr. 14, 1994This invention pertains to a machine for forming helical lock-seam tubing. The machine includes rollers for forming flanges on edges of laterally staggered overlapped strips, a forming head for forming the strips into a helical configuration, rollers for clinching the flanges into locking engagement, reels for supplying the strips, and structure for guiding the strips from the reels to the forming rollers. |
