To provide a transportation roller capable of reducing warpage with the elapsing of time, a transportation unit, a printing apparatus, and a method of manufacturing the transportation roller.
The transportation roller 15 includes a roller body 16 which is formed in a cylindrical shape by subjecting a metal sheet to a pressing process and allowing a pair of end portions 61a, 61b thereof to face each other, and which has a joint 80 formed between the pair of end portions 61a, 61b. In a sectional shape perpendicular to the axis O1 of the roller body 16, a thickness Th1 of a joint facing portion 160 facing the joint 80 with the axis O1 interposed therebetween is larger than a thickness Th2 of a joint portion 161 where the joint 80 is formed, and the thickness of the roller body 16 connecting the joint facing portion 160 and the joint portion 161 is gradually changed as it goes from the joint facing portion 160 to the joint portion 161.
NIIDATE TORU
OKUYAMA SHINJI
OZAWA KENJI
Osamu Suzawa
Kazuhiko Miyasaka
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