| 摘要 |
PATENT APPLICATION INVENTOR: NORMAN W. MACFEE TITLE: PLASTICIZING AND MOLDING ARTICLES FROM POLYMER STRIP Successive portions of a continuous polymer filament are plasticized such as by localized heating with ultrasonic or thermal energy, and the plasticized portions are molded in one or more cavities to form articles such as slide fastener elements. Additionally there is disclosed the attachment of a thermoplastic slide fastener coupling element to the edge of a tape by surrounding the leg portions with walls of cavities in a pair of ultrasonic members and applying ultrasonic energy through energy directing projections located centrally within the cavities to the pair of legs to fuse the legs to the edge of the tape. |
