| abstract |
The present invention relates to an improved mold structure for forming a polymeric gasket around a predetermined portion of a frangible sheet such as glass. The mold structure includes two cooperating mold sections having spaced apart facing surfaces for defining a chamber for receiving the glass sheet. A seal is positioned in at least one of the mold sections about the periphery of the chamber and is utilized to resiliently support the sheet within the chamber. The seal cooperates with the mold sections and a predetermined portion of the sheet for defining a gasket forming cavity having a configuration corresponding to the gasket to be formed on the sheet of the material. An inlet communicates with the gasket forming cavity and is utilized to introduce a flowable gasket material into the gasket cavity. In the preferred embodiment of the invention, the seal includes an EPDM rubber main body portion and a removable Teflon corner section which sealingly contacts the glass sheet and forms a portion of the gasket forming cavity. The surface of the seal which contacts the glass sheet is provided with a central apex portion to reduce compression of the seal at the corner portions. |