Melt-blow head with variable spinning width

US7438544B2 · kind B2 · utility

Inventors

• Erwin Glawion · Großostheim, DE
• Georg Harwarth · Alzenau, DE
• Burkard Kampfmann · Saarburg, DE

Key dates

• Filing date: Oct 3, 2006
• Grant date: Oct 21, 2008
• Expiry date: Oct 3, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C48/695
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Melt-blow head with a rectilinear row of nozzle bores arranged in a nozzle bar of a nozzle assembly, the nozzle bores serving to produce endless filaments formed from a melt, the nozzle bores being associated with blowing slots, in the form of longitudinal slots, to which nozzle bores the melt is fed, via melt feed pipes from one or more distribution bars and via melt pipes in a distribution block of the nozzle assembly. The blowing slots are supplied with the blow air through blow-air feed pipes in a blow-air feed element via blow-air distribution bores. A spinning width of the melt-blow head is variable, wherein only those blow-air distribution bores associated with the nozzle bores to be fed are connected to the blowing slots via blow-air pipes in the distribution block and, where appropriate, the other blow-air distribution bores are closed.