Patent ID: 11938718
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for detecting a web media height non-uniformity at a roller, comprising:
measuring, utilizing a first optical transmitter and first optical receiver pair situated adjacent to a roller, power of a first light beam emitted across a web media along a length of the roller;
measuring, utilizing a second optical transmitter and second optical receiver pair situated adjacent to the roller, power of a second light beam emitted across a length of the roller; and
identifying a media height non-uniformity based upon the measurement of the power of the first light beam received by the first optical receiver of the first optical transmitter and first optical receiver pair compared to the measurement of the power of the second light beam received by the second optical receiver of the second optical transmitter and second optical receiver pair.