Abstract: A hydro-extracting apparatus for drying cheeses of yarn comprises a rotary table having a plurality of spindles mounted thereon, on which spindles cheeses of dyed yarn are mounted vertically, a device for holding and conveying the cheeses one by one, which device includes a cheese lifting mechanism and a movable arm mechanism having chucks for engaging and releasing cheeses, this device being adapted for conveying cheeses one by one from the spindles of the rotary table to a hydro-extractor and, after hydro-extraction, to deliver the cheeses one by one to a cheese receiving unit, and a centrifugal hydro-extractor for hydro-extracting each of the cheeses, which hydro-extractor is laterally spaced apart from and adjacent to the foregoing device for conveying the cheeses. A flexible drive shaft and a spring are provided in the hydro-extractor to absorb vibrations, whereby hydro-extraction of dyed cheeses can be performed intermittently, consecutively and efficiently.

Abstract: A quick-release fastening device for securing a bobbin spacer to a spindle on which bobbins are axially mounted while allowing the absorption of thermal expansion of the bobbins, which device comprises a locking rod adapted to be firmly secured, at one end, to the spindle. The rod has an annular groove therein. Upper fastening means includes a sleeve slidably fitted on the locking rod which sleeve has ball-holding holes at the position corresponding to the annular groove and balls are located in the holes. A locking slide member is mounted on the sleeve which member is slidable freely along the sleeve and has a recess at its inner side. A compression spring is disposed in the recess and serves to cause sliding of the slide member. A flange member is provided surrounding the uppermost part of the sleeve above the recess and is fitted in the locking member. The balls are held between the annular groove of the locking rod and the slide member.