Patent ID: 9688003
Date: 2017-06-27
CPC Classifications: B29B,B29C

Claim:
1. A screw machine comprising: a casing; at least one casing bore formed in the casing; at least one shaft which is drivable for rotation about an associated axis of rotation and which is arranged in the associated casing bore; at least one treatment element for the treatment of a bulk material to be processed which is non-rotationally arranged on the at least one shaft; a feed opening for feeding the bulk material into the at least one casing bore; and a vacuum filter insert for degassing of the supplied bulk material, wherein the vacuum filter insert is arranged in the casing downstream of the feed opening when seen in a direction of conveyance, the vacuum filter insert being provided with at least one filter element, the vacuum filter insert forming a gas-permeable wall portion which defines the at least one casing bore, wherein a protective element comprising through-openings is arranged upstream of the at least one filter element when seen in a degassing direction, the protective element having at least two separate protective areas comprising through-openings, each protective area being assigned to a central channel.