Patent ID: 8766223
Filing Date: 2014-07-01
Classification: B65H

Abstract:
1. A device for monitoring a roll of film material wound thereon upon a core of the roll comprising: a sensor arrangement for detecting an end of the film material on the roll; and at least one optoelectric sensor being part of the sensor arrangement, wherein the optoelectric sensor is arranged stationary relative to a front side of the rotating roll resting on a mandrel, and is designed such that part of the front side of the rotating roll is optically detectable; wherein the optoelectronic sensor is a line sensor, detecting a part of an outer circumference of the core of the rotating roll without additional illumination; and, wherein a controller is provided that allows generating a control signal if a height between the outer circumference of the core and an outer circumference of the film material wound upon the core, which is sensed by the optoelectronic sensor, under-run a predetermined threshold.