| 摘要 |
1,203,044. Seaming non-metallic sheet material. SOC. D'ETUDES ET D'EXPLOITATION DE PROCEDES POUR L'INDUSTRIE AILIMENTAIRE (SEPIAL) CO. 15 Nov., 1967 [29 Nov., 1966; 15 June, 1967], No. 52101/67. Heading B5K. [Also in Division B8] In a machine for continuous sterile packaging, a web 34 is sterilized by radiation, formed into a tube, sealed longitudinally by a roller device 61 (not detailed) and sealed transversely, after filling, by jaws 68A, 68B. In one embodiment, the jaws are heated electrically, and in the retracted position the jaw-heads are cooled by water dripping on to them. In a second embodiment, Fig. 2 (not shown), sealing is effected by an ultrasonic device (133) comprising a magnetostrictive stage (134) and an emitter (135). The assembly is cooled by a liquid or gaseous coolant flowing in a casing, and the whole is mounted on a jack (139). The weld is made by a tool (136) bearing against an anvil (137) which may be resiliently mounted on a jack (138). The longitudinal seam may also be made using an ultrasonic device. |
