Continuous media recirculation milling process
May 25, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3104608 3713593 Method of crushing particles of material in a ball mill Metal flake production Ball mill Process for converting crude and/or coarsely crystalline perylenetetracarboxylic acid diimides to a pigmentary form Production of powdered resin and the powdered resin so produced Method for producing photographic emulsion Solid particle dispersion filter dyes for photographic compositions Polishing apparatus InventorsApplicationNo. 248782 filed on 05/25/1994US Classes:241/16, To aid dispersion or prevent chemical reaction, deliquescence, agglomeration or frothing241/21, Liquids added to make pulp or suspension241/22Application of solids to materialExaminersPrimary: Eley, Timothy V.Attorney, Agent or FirmForeign Patent References
International ClassesB02C 021/00B02C 023/36 AbstractA continuous method of preparing submicron particles of a compound useful in imaging elements (or other materials, such as pigments, etc.) comprises the steps of continuously introducing the compound and rigid milling media into a milling chamber, contacting the compound with the milling media while in the chamber to reduce the particle size of the compound, continuously removing the compound and the milling media from the milling chamber, and thereafter separating the compound from the milling media. In a preferred embodiment, the milling media is a polymeric resin having a mean particles size of less than 300 μm. The method enables the use of fine milling media in a continuous milling process which provides extremely fine particles of the compound useful in imaging elements while avoiding problems, e.g., separator screen plugging associated with prior art processes requiring the separation of compound from the milling media in the milling chamber.Other References
Field of SearchBy utilizing kinetic energy of projected or suspended materialLiquids added to make pulp or suspension To aid dispersion or prevent chemical reaction, deliquescence, agglomeration or frothing Application of solids to material Miscellaneous Tiltable axis of rotation Rotary grinding body pusher (e.g., ball chasers) With lifting or distributing at extremity of receptacle With non-axial opening Receptacle structure Roller supported receptacle Horizontal axis With feed and/or discharge Loose grinding body comminutor (e.g., ball or rod mills) Grinding bodies Compound movement receptacle With lining With independent means moving or guiding the material and/or grinding bodies in receptacle With lifting or distributing characteristics Rotating receptacle | |
