公开(公告)号：US11020993B2

公开(公告)日：2021-06-01

申请号：US16611242

申请日：2017-07-28

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Ramon Llosa ,  Javier Maqueda Castellote ,  Jorge Espert Cervera ,  Roger Casasayas Panella

IPC: B41J15/04 ,  B65H26/06 ,  B41J11/00 ,  G01B21/02

Abstract: An example media handling system includes a web media holder with a core hub capable of coupling to a core of a web media roll, a sensor to take a measurement at the circumferential surface of the web media roll, and a controller to determine a length of the web media roll. In that example, the controller may determine the length of the web media roll based on a first distance measurable by the sensor when the core hub is in a first orientation, a second distance measureable by the sensor when the core hub is in a second orientation after a number of rotations with respect to the first orientation of the core hub, and reference value corresponding to the core.