Patents by Inventor Robert M. Schlingman

Robert M. Schlingman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Vent apparatus and method for thermoset injection moulding systems
    Patent number: 5443778
    Abstract: A method for reducing the occurrence of voids and areas of porosity in injection molded parts. Vents are placed within the injection mold near areas of the molded part that are prone to the occurrence of voids and areas of porosity. A porous flow regulator is placed adjacent the vents to regulate the flow of the resin near the vent. The flow regulator allows air trapped within the mold to escape through the vents during molding. Allowing air trapped within the mold to escape reduces the occurrence of voids and areas of porosity in the molded part. A porous plug extends through the flow regulator and into the vent. The porous plug prevents excess quantities of resin from flowing out of the vent, thus reducing waste and also helping to maintain the flow regulator in place.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: August 22, 1995
    Assignee: Tempress Incorporated
    Inventor: Robert M. Schlingman