公开(公告)号：US4743320A

公开(公告)日：1988-05-10

申请号：US795227

申请日：1985-11-05

Applicant: Mark D. Shaw

Inventor： Mark D. Shaw

IPC: B29C65/34 ,  B65D77/20 ,  B65F1/16 ,  B65B7/28

CPC classification number: B65F1/1615 ,  B29C65/342 ,  B29C65/3444 ,  B29C65/3464 ,  B29C65/348 ,  B29C66/542 ,  B29C65/3468 ,  B29C66/545 ,  B29C66/8322 ,  B29L2009/00 ,  B29L2031/712 ,  B65D2543/00425

Abstract: A method of heat sealing a thermoplastic lid to a thermoplastic drum and an article of manufacture comprising a sealed container especially for hazardous and nuclear wastes are disclosed. A pair of flat ribbon resistance wires are encapsulated within a thermoplastic sheath and are arranged in spaced, parallel, substantially coplanar relation. For welding together the drum and lid, one or more pairs of encapsulated wires are attached to the lid and are compressed between confronting surfaces of the lid and drum by mean of a drum clamp. A predetermined electric current is passed through the wires to heat the wires and melt the thermoplastic sheath. As the thermoplastic sheath melts, the pressure exerted by the drum clamp squeezes the molten thermoplastic material radially inwardly and outwardly along the confronting surfaces of the lid and drum. The heated wires are urged into contact with the thermoplastic material of the drum and lid which is melted and intermingled to thereby weld the lid and drum together and form a sealed container.

Abstract translation: 公开了一种将热塑性盖热封到热塑性滚筒和制造物品的方法，该方法包括特别用于危险和核废料的密封容器。 一对扁平的电阻丝线被封装在热塑性护套内并且以间隔的，平行的，基本共面的关系布置。 为了将滚筒和盖子焊接在一起，一对或多对封装的线材连接到盖子上，并且通过滚筒夹具在盖子和滚筒的相对表面之间被压缩。 预定的电流通过电线加热电线并熔化热塑性护套。 当热塑性护套熔化时，鼓夹施加的压力沿着盖和滚筒的相对表面径向向内和向外挤压熔融的热塑性材料。 被加热的电线被推动与滚筒和盖子的热塑性材料接触，熔融和混合，从而将盖和鼓焊接在一起并形成密封容器。