40mm Bofors gun operation mechanism question

[russianammo]

My name is Chris and I am from Austria. I am a specialist in Soviet and Russian ammunition and I am the author of the Russian Ammunition Page at:
http://www.geocities.com/russianammo

Currently, I am researching the Soviet 37mm M1939 anti-aircraft gun, which is more-or-less a copy of the Swedish 40mm Bofors L/60.
I would like to make a description of the operation mechanism of this gun and one of the threads in this forum helped a lot.

However, I still don´t understand how the cartridge charger clip is ejected from the gun´s mechanism.
How can the clip move down together with the cartridges without getting into the way of the fired cartridge case?

As far as I understand the fired case is ejected rearward between the loading tray and the two feed rolls. This happens before the two feed rolls feed the next cartridge onto the loading tray.
However, when the incoming cartridge is supplied, what happens with the cartridge charger clip?
Does it remain stationary inside the feed mechanism?
This would, however, also mean that all cartridges are unlocked from the charger clip as soon as the clip is inserted into the feed mechanism. Because otherwise the following cartridges cannot move down without the charger clip.

When and how is the cartridge charger clip ejected? Does it move sideways, out of the line of the ejection chute?

I would very much appreciate if somebody could bring some light on this!

Thanks very much in advance!
Chris