Lubrication tube interconnections for idler rolls

Abstract From the Canadian patent

A series of flexible substantially cylindrical tubes communicates with the hollow central bores of shafts of adjacent idler rolls to form a conduit so that lubrication introduced through a fitting at one end of the idler roll assembly can be distributed in sequence to all of the rolls. Opposite ends of each tube are secured in position by insertion into an axial passageway in the end cap? secured to the ends of the shafts. In the preferred embodiment each passageway has, a tapered entrance to facilitate the insertion of a tube and a, radially inwardly extending knife edge at the inner end remote from the entrance. The diameter of the passageway along its axial extent is slightly larger than …