Security system for a converting machine

A security system for a converting machine, the security system comprising:

• a detection unit comprising a plurality of sensors arranged side by side and wherein each sensor having an individual control zone, the detection unit being configured to detect an arrival time to each control zone and a departure time from each control zone of an object transported through the control zones, the arrival time and the departure time of the object being determined from control signals from each sensor, and wherein the control signals from each sensor comprise a rising signal and falling signal, and wherein each sensor having a vertical sensing direction,
• an evaluation unit configured to receive the control signals from each sensor of the detection unit and determine the arrival time from the rising signal and departure time from the falling signal and to provide an error signal when an error state is determined,
• a memory containing a program to cause the evaluation unit to determine an error state indicating the presence of a prohibited object based on the arrival time and/or the departure time in each control zone, and
• a light barrier system comprising a light barrier and a muting device, the muting device comprising an upstream muting detector and a downstream muting detector located on opposite sides of the light barrier,
• wherein the security system comprises a control unit configured to activate the muting device in order to mute the light barrier when an admissible object to be transported is detected by the upstream muting detector, and to activate the light barrier when the admissible object is detected by the downstream muting detector, and wherein the sensors in the detection unit are configured to be activated when the upstream muting detector generates a muting signal and the light barrier is muted, and wherein the control unit is configured to receive the error signal from the evaluation unit and to generate a stop signal when an error state is detected.