Patent ID: 7675533
Filing Date: 2010-03-09
Classification: B41J,B65H

Abstract:
1. A thermal transfer printer for film, comprising: conveyance means for conveying a plastic film along a predetermined path; an ink ribbon moving mechanism which includes holding means for holding a plurality of ink ribbons, moves an ink ribbon arbitrarily selected from the plurality of ink ribbons to a print position arranged on the predetermined path; a print head which prints on the plastic film by heating the ink ribbon moved to the print position; a platen roller which supports the ink ribbon and the plastic film from an opposite side of the print head; a displacement preventing mechanism which brings the platen roller and the plastic film into close contact with each other such that the platen roller and the plastic film are not displaced from each other; wherein a pinch roller which presses the plastic film against the platen roller is provided as the displacement preventing mechanism; and a contact angle θ between the plastic film and the platen roller, backward tension T (where θ=0 deg. to 180 deg.).