Device for monitoring rolls of film material wound thereon and packaging machine

摘要

A packaging machine and a device for monitoring a roll with film material wound thereon is disclosed. By means of a sensor arrangement, an end of the film material on the roll may be detected. The sensor arrangement includes at least one optoelectric sensor arranged stationary relative to a front side of the roll. The optoelectric sensor is designed such that a portion of an outer circumference of the rotating roll may be detected.

主权项

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.