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US 4,908,123 AGranted
Method and apparatus for removing relatively dense foreign materials from shredded paper
AssigneeKimberly-Clark Corporation
InventorRobert M. Miers
Life of this patent
Estimating the term…
Abstract
An air separator for removing relatively dense foreign materials from shredded paper comprises a downwardly pitched inlet duct which causes relatively dense particles to impact the wall of a vertical discharge duct and deflect downward for removal while the shredded paper follows the air flow through a horizontal outlet duct.
Claims8
An air separator for removing relatively dense foreign materials from shredded paper comprising:
- (a) a downwardly pitched open-ended inlet duct for receiving and conveying shredded paper;
- (b) a substantially horizontal outlet duct for conveying an airborne stream of retained shredded paper;
- and
- (c) a substantially vertical open-ended discharge duct for receiving the relatively dense foreign materials and deflecting them away from the shredded paper, said discharge duct having a cross-sectional area greater than the cross-sectional area of the inlet duct;
- wherein each of the abovesaid ducts is joined to the other two ducts at a common juncture and wherein the inlet duct and discharge duct are situated such that the inlet duct substantially projects onto a wall of the discharge duct.
2 more elements
A method for separating relatively dense foreign materials from shredded paper comprising:
- (a) feeding a mixture of shredded paper and relatively dense materials into a downwardly pitched open-ended inlet duct and drawing the mixture with a downstream fan through the inlet duct in a first direction to a separation zone comprising the common juncture of the inlet duct, a substantially horizontal outlet duct, and a substantially vertical open-ended discharge duct;
- (b) abruptly diverting the direction of flow of the shredded paper at the separation zone to a second direction through the outlet duct, wherein the relatively dense materials continue travelling in the first direction and are deflected in a downward direction by a wall of the vertical discharge duct against an upward flow of air drawn by said fan and thereby separated from the shredded paper.
Dependencies are inferred from the claim text.