Patent
Apparatus for controlling the density of a fiber feed mat
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TLDR
In this article, a pressure gauge is connected to the inlet duct of the suction fan that causes fibers to be drawn from a feed mechanism and laid down on a condenser to form the mat.Abstract:
For controlling its fiber density during formation of a mat that is to be fed to the lickerin of a card or web forming machine, a pressure gauge is connected to the inlet duct of the suction fan that causes fibers to be drawn from a feed mechanism and laid down on a condenser to form the mat; and this gauge is geared to a pivoted or reciprocable damper in the duct to control air flow in the duct, thereby to control the density of the mat. The control damper may be positioned either at the inlet or the outlet side of the fan.read more
Citations
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Patent
Fiber feeding apparatus for carding machines and the like
TL;DR: In this article, a pneumatic feeding system is described, where fibers are conveyed by air to surge sections formed in the upper ends of vertical branch ducts, and the fibers are withdrawn in a uniform layer from each screen by a doffer roll, and are fed to the feed assembly of a web forming machine.
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Patent
Method and apparatus for forming a web
TL;DR: In this paper, a method and apparatus for forming a web having a predetermined grammage profile in its transverse direction is provided, which includes the steps of introducing a flow of particulate material into the distribution chamber of a forming head through an oscillating nozzle and depositing the material on an air permeable belt to form a web while changes in the upper surface of the web are detected downstream of the distribution chambers, signals are generated in response to any change which are compared with predetermined set points and an output control signal is generated as a result of the comparison.