Method and means for securing bubble caps to riser tubes

Details Method and means for securing bubble caps to riser tubes Method and means for securing bubble caps to riser tubes

B - Operations, Transporting

01

D

165/7

B01D 3/20 (2006.01) B01F 3/04 (2006.01) B01F 15/00 (2006.01) B21D 41/04 (2006.01)

Patent

CA 1245974

- 8 - ABSTRACT OF THE DISCLOSURE A spider is formed at the upper end of a vapor riser tube by shearing and upsetting or crimping a portion of the upper end to form a support for a bolt which mounts the bubble cap. Four metal shearing and forming jaws are moved in a horizontal plane toward the upper portion of the riser tube. These jaws are advanced simultaneously into the side of the riser tube to horizontally shear a portion of the upper end of the tube and deform the sheared sides of the tube inwardly until the material extends over the central axis of the tube to form a spider with an aperture coinciding with the axes of the tube. A bolt is then extended through the aperture to link the bubble cap to the riser tube.

477290

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