Patent ID: 7427229

Claim:
A method for gutting decapitated and undecapitated fish, including the steps of: opening an abdominal cavity of the fish with a circular blade with guide gouge, scraping out and aspirating entrails which are then partially detached with a suction nozzle, opening a membrane of a blood kidney and aspirating blood and water with suction scrapers, extracting entrails and blood and water via suction pipes, characterized in that: the entrails on the one hand and blood and water on the other hand are collected separately from each other, the suction nozzle is closed at the end of the abdominal activity by a slide valve provided with a cutting edge, so that the entrails fully separated from the fish's body lie in the suction nozzle and during upward movement of the suction nozzle out of the fish there is a switch from a first vacuum unit to a second vacuum unit which has a lower partial pressure than the first vacuum unit, and the slide valve is opened after switching to the second vacuum unit.