Device for feeding a converting unit with a web substrate for a feeding station in a packaging production machine

A device for feeding a web substrate to a converting unit, the converting unit for converting the web substrate when stopped, the device comprising:

• a main drive roller rotating in a first direction on a main shaft,
• a main electric drive motor rotating the main drive roller,
• a satellite roller which is configured and operable to oscillate about the main drive roller, from upstream to downstream, and vice versa with respect to the first direction,
• two lateral levers holding the satellite roller, and mounted on and joined to the main shaft, and
• at least one secondary electric drive motor which is configured and operable to oscillate the main shaft, the two lateral levers and the satellite roller,
• the main drive roller and the satellite roller being positioned and configured to engage and maintain the web substrate between them, and configured and operable to change a speed of the web substrate cyclically from a constant speed to a zero speed at an exit region of the satellite roller, and vice versa,
• wherein the secondary electric drive motor is mounted coaxially with the main shaft.

A device for feeding a web substrate to a converting unit, the converting unit for converting the web substrate when stopped, the device comprising:

• a main drive roller rotating in a first direction on a main shaft,
• a main electric drive motor rotating the main drive roller,
• a satellite roller which is configured and operable to oscillate about the main drive roller, from upstream to downstream, and vice versa with respect to the first direction,
• two lateral levers holding the satellite roller, and mounted on and joined to the main shaft, and
• at least one secondary electric drive motor which is configured and operable to oscillate the main shaft, the two lateral levers and the satellite roller,
• the main drive roller and the satellite roller being positioned and configured to engage and maintain the web substrate between them, and configured and operable to change a speed of the web substrate cyclically from a constant speed to a zero speed at an exit region of the satellite roller, and vice versa,
• the main shaft, the two lateral levers and the satellite roller, wherein the secondary electric drive motor has a rotor that is joined to the main shaft.