Patent ID: 9631300
Date: 2017-04-25
CPC Classifications: B65H,D02G,D02J

Claim:
1. A device for pneumatically conveying and guiding a multifilament synthetic thread, the device comprising: a closed conveying duct which at a first end has a thread inlet opening and at a second end, being opposite the first end, has a thread outlet opening; at least one compressed-air duct which opens into the conveying duct in an injector zone of the conveying duct, which injector zone is formed between the thread inlet opening and the thread outlet opening wherein the compressed-air duct is connectable to a compressed-air source; and a return stream duct opening into a duct portion of the conveying duct, between the thread inlet opening and a mouth of the compressed-air duct, the return stream duct connecting the conveying duct to an ambient atmosphere; wherein the return stream duct opens out having an inclination in a conveying direction of the conveying duct; and wherein a mouth of the return stream duct is configured such that a rounded transition face is formed between the return stream duct and the conveying duct, said transition face being rounded in a stream direction.