Molding machine for injection molding of tooth brushes
Patent 5609890 Issued on March 11, 1997. Estimated Expiration Date: 
April 18, 2015. 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.
April 18, 2015. 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 2923035 3308112 3466700 3804576 3832110 Apparatus for manufacturing brushes Method and forming tool for the fabrication of a bristle support for a brush, especially a hair brush Method of operating a two-shot injection-molding machine Method and machine for manufacturing brushes Brush with self retaining bristles InventorAssigneeApplicationNo. 423093 filed on 04/18/1995US Classes:425/120, Plural sources feeding the fluent material264/243, Bristled or tufted article making264/328.8, With multiple injectors, mold cavities, or multiple steps of injection of material425/123, Means to support plural preforms in spaced relation in or at common female mold425/126.1, Means to convey preform to female mold425/130, MEANS FEEDING FLUENT STOCK FROM PLURAL SOURCES TO COMMON SHAPING MEANS TO FORM COMPOSITE PRODUCT425/436R, SHAPING SURFACE INCLUDING MEANS TO RELEASE OR REMOVE PRODUCT FROM SHAPING SURFACE425/453, DYNAMIC SUPPORT OR DYNAMIC CARRIER AND FEMALE MOLD425/556, With product ejector425/588, Plural mold cavities425/805COMB OR BRUSHExaminersPrimary: Nguyen, Khanh P.Attorney, Agent or FirmForeign Patent References
International ClassesB29C 045/06B29C 045/10 B29C 045/14 Foreign Application Priority Data1994-04-19 GBAbstractFor injection molding of tooth brushes from two different molding material components with tufts of bristles incorporated in the head portions of the brush bodies a molding machine is proposed which includes a tuft loading station, a first injecting station associated with the first material component and a second injecting station associated with the second material component. In one or each injecting station, the stationary molding block has a recess, and a movable mold insert part fits into this recess to complete the stationary mold block. The movable mold insert part is provided with tuft insertion holes and can be transferred to the tuft feeding station where tufts of bristles are loaded into the tuft insertion holes so that they have their inner ends projecting into the mold cavity portion defined by the movable mold insert part. Production of tooth brushes is a continuous sequence of tuft loading and injecting steps.Field of SearchMeans to convey preform to female moldMeans to charge fuent stock under pressure Means to continuously feed indefinite length preform Plural sources feeding the fluent material With product ejector Means to support plural preforms in spaced relation in or at common female mold Plural mold cavities By movable ejector means entering mold cavity SHAPING SURFACE INCLUDING MEANS TO RELEASE OR REMOVE PRODUCT FROM SHAPING SURFACE DYNAMIC SUPPORT OR DYNAMIC CARRIER AND FEMALE MOLD Means to raise or lower mold DYNAMIC MALE SHAPING MEANS INCLUDING MECHANICAL MOVEMENT OR POWER MEANS COMB OR BRUSH MEANS FEEDING FLUENT STOCK FROM PLURAL SOURCES TO COMMON SHAPING MEANS TO FORM COMPOSITE PRODUCT Including cooperating, relatively stationary means for intermittently locking material or cable Including either force transmitting, hand held and operated lever or animal powered sweep | |
