Melt-blow head with variable spinning width

Details Melt-blow head with variable spinning width Melt-blow head with variable spinning width

2006-10-03

2008-10-21

Davis, Robert B. (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

By means applying fluid jet or blast to unconfined liquid...

C425S072200, C425S19200R, C425S382200, C425S464000

Reexamination Certificate

active

07438544

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.

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