公开(公告)号：US5443056A

公开(公告)日：1995-08-22

申请号：US243387

申请日：1994-05-16

申请人： W. Stan Smith ,  Robert D. Deutsch ,  Fred H. Hockney ,  Angela Garland

发明人： W. Stan Smith ,  Robert D. Deutsch ,  Fred H. Hockney ,  Angela Garland

IPC分类号： B29C65/24 ,  B29C65/48 ,  F16L59/02 ,  F24V30/00 ,  F24J1/00

CPC分类号： F16L59/026 ,  B29C65/18 ,  B29C65/247 ,  B29C65/4825 ,  B29C65/4835 ,  B29C66/5221 ,  F24J1/00 ,  B29L2023/22

摘要： A mixture of magnesium-iron alloy and salt is confined within a nonwoven cellulose covering and forms an elongated cartridge which is wrapped with multiple layers of absorbent paper. The cartridge and paper are enclosed within a pouch of perforated plastic film to form a heating element. One or more heating elements are attached by adhesive tape to the inside of a generally triangular polyethylene film envelope, and peripheral portions of the envelope are heat sealed to form an enclosed chamber. An overlying mating sheet of polyethylene coated nylon film and a pad of thermoplastic foam material are heat sealed to peripheral portions of the envelope, and parallel strips of double-sided adhesive tape, with removal protective strips, are attached to the outer surface of the envelope to form a flexible heater device. The device is used by being wrapped around either a vertical or horizontal pipe joint containing a heat activated epoxy. An upper sealed corner portion of the envelope is cut and removed to form an opening for the chamber, and water is poured through the opening into the chamber to initiate an exothermic reaction with each heating element for heating the pipe joint and epoxy to accelerate curing of the epoxy.

摘要翻译： 镁 - 铁合金和盐的混合物被限制在非织造纤维素覆盖物内并且形成细长的盒，其被多层吸收纸包裹。 盒和纸被封闭在穿孔塑料薄膜袋中以形成加热元件。 一个或多个加热元件通过胶带粘附到大致三角形的聚乙烯膜封套的内部，并且封套的周边部分被热密封以形成封闭的腔室。 将聚乙烯涂覆的尼龙膜和热塑性泡沫材料垫的上覆配合片热封到外壳的周边部分，并且具有去除保护条的双面胶带的平行条附着到信封的外表面 以形成柔性加热器装置。 该装置被缠绕在包含热活化环氧树脂的垂直或水平管接头上。 将封套的上密封角部分切割并移除以形成用于室的开口，并且将水通过开口注入室中以引发与每个加热元件的放热反应，用于加热管接头和环氧树脂以加速固化 环氧树脂。