Abstract: This invention provides a process for production of surimi with stable quality from fish infected with the parasite Ichthyophonus hoferi, and a process for production of surimi based products of good quality using the surimi as the raw material. In the process for production of surimi from parasite-infected fish, an additive for inhibiting protease activity and recovering gel-forming capability, and calcium are added in the process of production of surimi from fish infected with Ichthyophonus hoferi, preferably from Alaska pollock. A protease inhibitor, preferably a thiol protease inhibitor, is used as the additive.

Abstract: Screw-holding device for receiving a screw are supported from three directions around the device and incline, whenever necessary. The screw-holding devices move in parallel at times. There are also provided engaging devices that are combined with the screw-holding devices and transmit a rotational torque to the screw-holding devices. A space is secured between these two devices for allowing the inclination of the screw-holding device.