| 摘要 |
PROBLEM TO BE SOLVED: To ensure a smooth transport of recording paper sheet by forming one or two or more lines of projection portions orthogonal to the carrying direction of recording paper sheet across the whole width of a guide surface of recording paper sheets formed on a carrying path, and making the center of the projection portion curved to be higher than opposite ends thereof. SOLUTION: A guide surface 4 of thermosentivive paper sheet consitst of a linear slope portion 4a toward a position R where a platen roller 5 is arranged and a curved portion 4b moderately curved in the carrying-in side of thremosensitive paper sheet. On the surface of the curved portion 4a of the guide surface 4, several lines of protruding portion 4c swelling outward in it center so as to reduce contact with the thermosensitive paper sheet are foremed across the whole width of paper width (e.g. 60 mm). The shape of the protruding portion 4a in the paper width direction is made e.g. 2-3 mm high at its center. Accordingly, the line contact between the phtosensitive paper sheet and the guide surface 4 occurs to reduce the running resistance thereof at the time of carrying it to thereby ensure a smooth movement thereof and prevent generation of skewing therein with the surface shape of the projection portion 4c.
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