distance substantially greater than the width of the
ribbon;
the major diameter of the crown roller being located
closer to a near end than a far end of the crown
roller;
the major diameter of the crown roller positioned to
locate a new ribbon so as to squeeze the new ribbon
principally nearer a ?rst ribbon edge closer to the far end of the crown roller, whereby the ribbon
nearer the ?rst edge of the ribbon is stretched; and
suf?cient space between the ?rst edge of the ribbon
.and the far end of the crown roller to accommo
date the ribbon as through wear and stretching the
ribbon‘ migrates on the crown roller to bring a
second edge of the ribbon, opposite the ?rst edge of
the ribbon, toward the major diameter of the crown roller, thereby locating a worn ribbon so as
to squeeze the worn ribbon principally less near the
?rst edge of the ribbon.