| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a paper-made winding core which can dissolve level difference marks of a web and is excellent in productivity, cleanness, and waste property by forming constant level differences in an axial direction with stable accuracy in the paper-made core for winding the web. <P>SOLUTION: The paper-made winding core for winding the web includes a paper-made cylindrical core body and a level difference forming member which is bonded to an outer peripheral face of the cylindrical core body and forms a level difference portion extending in parallel to the axial direction. In the level difference forming member, one end has a level difference portion which is substantially equal to thickness of the web and the other end mostly does not have a level difference with the outer peripheral face of the core body, and the member is formed of a paperboard with density of 0.20 to 0.90 g/cm<SP POS="POST">3</SP>. <P>COPYRIGHT: (C)2012,JPO&INPIT |
