A hollow drum-type recording apparatus includes: a hollow drum which has an opening and whose hollow circular arc-shaped main body rotates; a recording sheet which is wound around the surface of the circular arc-shaped main body of the hollow drum from a recording sheet roll; an internal holder for a...http://www.google.se/patents/US6283652?utm_source=gb-gplus-sharePatent US6283652 - Hollow drum-type recording apparatus
