Roller sifting and dispersing machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jul 10, 2001
Grant Date -
N/A
app pub date -
Dec 8, 1999
filing date -
Dec 14, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A roller sifting or dispersing machine for the classification or dispersing of wood chips, fibers, or similar materials and to the utilization of an above-described roller sifting or dispersing machine. The roller sifting machine includes annular grooves and annular crosspieces. An outer sheathing surface of each annular crosspiece is provided with adjoining teeth in the circumference direction. The front tooth-side in the direction of rotation is steeper than the adjoining tooth back-side. The crosspiece and teeth of a roller also form a gradient that is opposed to the adjacent roller but has the same gradient height. The leading tooth sides of the circulating teeth create a pitching effect on the particles of the material to be sifted so that clogging of the roller set are avoided and an accelerated movement towards the exit end is achieved. By the continuous opposing movement of the teeth, clogging of these openings for the passage of chips is avoided. Also, the separation effectiveness can be regulated by modification of the roller revolution speed.
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