Plastic article or earthenware shaping or treating: apparatus – Air felting type shaping means – With particle liberating means
Reexamination Certificate
2006-11-14
2006-11-14
Heckenberg, Donald (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Air felting type shaping means
With particle liberating means
C425S083100
Reexamination Certificate
active
07134859
ABSTRACT:
A plant which serves to produce a nonwoven web of fibers out of a fibrous material, such a cellulose pulp. The plant comprises a hammer mill for defibrating the fibrous material and a forming head for forming a web of fibers on an endless forming wire, which, during operation, runs mainly horizontally, a first transport fan for transporting defibrated fiber to the forming head via a first air duct and a second transport fan to extract nits from the forming head via a second air duct. Furthermore, the plant comprises a separator, which is connected to the second air duct and arranged for separating the nits and the well-opened fiber, a third transport fan for returning the separated, well-opened fibers to the forming head, and a nits-opener for converting the separated nits into well-opened fiber. The separated nits are transported from the nits separator to the nits-opener by means of a fourth transport fan via a fourth air duct. The defibrated fibers are returned to the forming head by means of a fifth transport fan via a fifth air duct. The plant is easy to control and is capable of producing optimally high quality fiber products. In addition, the plant allows the defibrator to defibrate new fiber material at full capacity so that the remainder of the plant is able to produce at an optimum output level. The plant is furthermore very energy-saving.
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Heckenberg Donald
M&J Fibretech A/S
Winston & Strawn LLP
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