Sleeve for pressing rollers

A sleeve for a pressing roller having an outer diameter, comprising:

• an internal tube made of expandable material and having an inside diameter substantially corresponding to said roller outer diameter over which said material is adapted to be placed;
• an outer, dimensionally stable casing tube connected to said internal tube through bushings provided on terminal areas of said casing tube, each bushing oriented substantially parallel to a longitudinal axis of said roller and having a borehole engaging said roller outer diameter, an outer surface directly adhered to said casing tube, and a segment extending over the terminal area of said casing tube and directly engaging said roller outer diameter with a press fit, said segment having radial ring-shaped grooves connected through axial boreholes with outer fronts of said bushing for passage of air.

The combination of a cantilevered roller and an outer sleeve, comprising:

• a cantilevered roller core having a diameter and a terminal collar at an inner end thereof;
• a removable sleeve having an internal tube and an outer casing tube connected thereto, said internal tube made of expandable material with an inside diameter substantially corresponding to the diameter of said roller core over which said material is adapted to be placed, said outer casing tube being dimensionally stable;
• bushings connected to an internal end and an external end of said sleeve, said internal end bushing having a first borehole and said external end bushing having a second borehole, said first borehole being larger than said second borehole so that said internal bushing can be pushed onto a free end of said cantilevered roller core with minimal contact over a length of said roller core up to said terminal collar upon which said internal bushing is pressed with a force fit.