It's probably a cylinder transfer.
The plate puts the ink on a rubber roller, the paper goes between the rubber roller and a steel roller.
If the sheet doesn't feed, the ink is printed to the steel roller instead of the paper, and the next sheet of paper gets printed by both the rubber roller and the steel roller.
They're usually more detailed than a wst (Offset transfer) But depending on the ink, the steel roller, and how much pressure is applied it can be a bit less than perfect.
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