Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Reexamination Certificate
2006-10-31
2006-10-31
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
C241S261200, C241S297000
Reexamination Certificate
active
07128286
ABSTRACT:
A double disk refiner and inducer for the same that mixes fiber in low consistency (6% or less by weight) stock and urges it towards both pairs of refiner disks of the double disk refiner. In a preferred embodiment, the inducer comprises an impeller that has at least one flight extending radially outward from an inner hub. Each flight is angled and also can be curved so as to substantially continuously mix and urge stock toward the disks. In one preferred embodiment, the inducer is an impeller that has two helical flights that are axially spaced from one another but that overlap in an axial direction. In a preferred method, the low consistency stock is urged by the inducer toward the disks preventing clumping of fibers in the stock and breaking up any clumps already present in the stock. As a result, the gap between the disks can be increased from between one thousand and three thousandths of an inch to increase the output of the refiner.
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Sprout-Bauer Twin-Flo III Refiners photo, undated.
Sprout-Bauer Twin-Flo III Refiners drawing, undated.
DD 3000 Refiner Parts drawing with labeled parts, J & L Fiber Services, Inc., undated.
DD 4000 Refiner Parts drawing with labeled parts, J & L Fiber Services, Inc., undated.
Chaney Michael R.
Kehn Thomas J.
Reinhall Ulf B.
J&L Fiber Services, Inc.
Michael & Best & Friedrich LLP
Rosenbaum Mark
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