Roll neck sealing device

Claim 1

A roll neck sealing device comprising: a sleeve mounted on an outer surface of a roll at one end; a bushing mounted on said sleeve for relative rotation with respect to said sleeve; a housing secured to an outer surface of said bushing for supporting said roll; a neck seal consisting of an inside neck seal and an outside neck seal, both fitted to an outer surface of a neck portion of said roll; a seal end plate which is secured to said housing and provides a cylindrical inner surface against which sealing lips of said neck seal bear and slide; an engagement means consisting of a fixing pin projecting from an end of said sleeve toward said inside neck seal and a hole formed in said inside neck seal; and a preventive means, one end of which is secured to said outside neck seal and the other end of which extends through said hole into a core hole formed in said fixing pin which is received in said sleeve, said preventive means being adapted for preventing relative rotation between said neck seal and said sleeve; whereby an axial length over which said preventive means is inserted into said fixing pin is set at a distance greater than the maximum allowable axial play between said sleeve and said bushing that is caused when the sealing member is being replaced.