One of the most overengineered piece of bad engineering.
The door is completely unnecessary, ever seen a press with a hingeable load structure? Probably not, because it weakens the structure and is completely unnecessary. Just flip the good old portal press by 90° and load the bags from the top.
That acme screw thingy is ridiculous, such a 18th century design, except they knew on how to build acme screw presses back then and used massive screws. That screw will always get all the loading on a few mm's of it's length. That's where the screw will start fretting and galling before getting stuck forever. From what I can see, they were even stupid enough to fabricate the nut from the same material as the screw (hardened? steel) instead of bronze or brass, which will make the issue even worse.