Abstract: An every course hose is produced by knitting substantially exclusively a covered elastic yarn into the leg portion knitting fabric thereof. A covering yarn is wound around an elastic yarn as the core yarn to form the covered elastic yarn. The covering yarn is constituted of a plurality of filaments made of a polyamide substantially free from titanium oxide and having a flat cross section with a flatness (b/a) (the ratio of the length b to the width a) of 2.0 to 6.0.

Abstract: A thermoplastic polymer is melt-spun into a spinning tube decompressed to not more than 0.7 atm and withdrawn therefrom to the outer air through a narrow groove provided in a bottom sealing body which substantially seals the interior of the spinning tube from the outer air. The bottom sealing body is provided with a plurality of regulating chambers communicating with the groove, which chambers are controlled to have interior pressures of intermediate values between those of the spinning tube and the outer air, whereby the pressure pulsation of an air stream flowing into the interior of the spinning tube from the outer air through the groove can be avoided. This, in turn, ensures a smooth spinning operation and uniform yarn quality.

Abstract: A thermoplastic polymer is melt-spun into a spinning tube decompressed to not more than 0.7 atm and withdrawn therefrom to the outer air through a narrow groove provided in a bottom sealing body which substantially seals the interior of the spinning tube from the outer air. The bottom sealing body is provided with a plurality of regulating chambers communicating with the groove, which chambers are controlled to have interior pressures of intermediate values between those of the spinning tube and the outer air, whereby the pressure pulsation of an air stream flowing into the interior of the spinning tube from the outer air through the groove can be avoided. This, in turn, ensures a smooth spinning operation and uniform yarn quality.

Abstract: An antistatic composite filament is disclosed, which has a three-layer structure including a core layer, a sheath layer and an intermediate layer, each of which is continuous in the axial direction of the filament. The core layer is composed of an oriented and crystallized, electrically non-conductive synthetic polymer. The sheath layer is composed of a synthetic polymer of the same kind as of the polymer constituting the core layer. The intermediate layer is composed of an electrically conductive synthetic polymer containing carbon black dispersed therein and is present in the entire intermediate area between the core layer and sheath layer. This filament is advantageously used as material for an antistatic carpet and/or dark color articles of wear such as uniforms or the like.