The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1986
Filed:
Jan. 17, 1985
Wolfgang Greiser, Neusass, DE;
Hans Wagner, Bobingen, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
An apparatus for producing a spunbond by pneumatic take-off and laying of melt-spun filaments comprises a superatmospheric pressure chamber which is connected to the melt spinneret in a gas-tight manner and has discharge orifices for the filaments. Said superatmospheric pressure chamber tapers weekly conically into a drawing cell. The aperture angle of the weakly conical superatmospheric pressure chamber is less than 7.degree.. The filaments are spun in the form of a linear curtain into the interior of the superatmospheric pressure chamber which is just as wide as the curtain. One side of the conical portion and of the drawing cell is moveable and, at the start of the melt spinning, can be moved away from the other wall, so that the start-up of spinning is facilitated.