Improved use of self-leveling shims in centrifugal apparatus
Patent 5191923 Issued on March 9, 1993. Estimated Expiration Date: 
March 1, 2011. 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.
March 1, 2011. 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 3280434 Transfer molding method Method of molding articles of polymeric foam substantially free from flashing Apparatus for use in centrifugal moulding Patent #: 4723904 InventorAssigneeApplicationNo. 664594 filed on 03/01/1991US Classes:164/292, Having mold or mold part clamping means164/290, Plural mold cavities264/311, Utilizing centrifugal force264/313, Utilizing a flexible, deformable, or destructable molding surface or material425/425, FEMALE MOLD INCLUDING TAMPING MEANS OR MEANS UTILIZING MOLD MOTION TO DISTRIBUTE OR COMPACT STOCK THEREIN425/434Plural female moldsExaminersPrimary: Silbaugh, Jan H.Assistant: Ortiz, Angela Attorney, Agent or FirmInternational ClassB22D 010/10AbstractA self-leveling shim for centrifugal casting apparatus of the type wherein piston means maintain two-part elastomer molds in pressurized engagement with each other during the molding operation, said shim comprising an inflatable bladder positioned between said piston means and said molds, said bladder being inflatable only at selected portions thereof, so as to apply shim pressure at the portions of the molds where such pressure is required.Field of SearchFEMALE MOLD INCLUDING TAMPING MEANS OR MEANS UTILIZING MOLD MOTION TO DISTRIBUTE OR COMPACT STOCK THEREINBy slinger or rotating liquid comminutor Means to rotate female mold about horizontal axis With means to close mold Varying pressure and/or speed closing SEGMENTED FEMALE MOLD AND MOLD CLAMPING MEANS Utilizing centrifugal force Utilizing a flexible, deformable, or destructable molding surface or material Producing multilayer work or article Including means for relatively moving blow means into engagement with shaping member Plural mold cavities Having mold or mold part clamping means By centrifugal force | |
