小小动物园作文专利名称：METHOD FOR FORMING THREADS ON PLASTIC NIPPLES
发明人：EDGAR J,US
穿心莲的做法>电脑门锁申请号：US34046273许海中学
申请日：19730312
公开号：US3856906A施工招标
公开日：
什么是包茎
视为是什么意思19741224
专利内容由知识产权出版社提供
摘要：Apparatus is provided to perform the following work steps in quence. First, one end of a plastic tube is heated while under circumferential compression. The compression deforms the heated end inwardly and when the apparatus exerting the compressive force is removed, the heated end is inrted in, and gripped by gmented dies having pipe threads on their gripping surfaces. An expansion tool is inrted into the heated end of the tube and an elastomeric annulus which is part of the tool is compresd axially. Said axial compression displaces the annulus radially against the inner surface of the tube which, in turn, is expanded radially and deformed into the thread form of the dies. Next the axial pressure on the annulus is relead, the annulus recedes radially and the expansion tool is retracted from the tube end. A cooling probe is inrted from the opposite end to hold the threaded tube in place as the gmented dies are parated. The cooling probe will freeze the heated end of the tube such that the thread form will be permanently fixed in the exterior tube surface.
形容夕阳申请人：EDGAR J,US
更多信息请下载全文后查看
