Patent ID: 7455262

Claim:
An adapter assembly for paper roll holders in a printer or plotter wherein the holder is adapted to accommodate one size of paper roll having a first internal bore for attaching to spaced apart end members mounted to a support shaft, the end members having a plurality of triangular shaped protrusions for engaging the internal bore of the paper roll to prevent relative rotation there between, the adapter assembly for allowing a larger paper roll having a second larger internal bore, the adapter assembly consisting of a device mountable to each of the spaced apart end members, the device comprising; a cylindrical shaped spacer having an internal bore and an external surface, said internal bore of said spacer having a diameter such that said spacer mates with the end member and said external surface having a diameter such that said spacer mates with the second internal bore of the larger paper roll; a plurality of tapered triangular shaped grooves mounted on said internal bore of said spacer for engaging the plurality of triangular shaped protrusions on the end member such that rotation there between is prevented; and protrusions mounted on said external surface of said cylindrical shaped spacer for engaging the internal bore of the larger paper roll.