发明名称 |
Apparatus for fabricating drip irrigation tape |
摘要 |
An apparatus is disclosed for fabricating drip irrigation tape from a water impervious polyethelene film. A shaping assembly with a water-cooled vacuum drum preforms a groove along one edge, a folding device folds the strip lengthwise to form a first conduit, and a sealing assembly with an electrically-heated heat sealing wheel joins the edges along opposite sides of the groove to form a seam in which the groove defines a secondary conduit that is resistant to deformation. Flat spots on a pair of outwardly-extending annular ribs around the circumference of the heat sealing wheel produce breaks in the seam for inlet ports and outlet ports.
|
申请公布号 |
US4722759(A) |
申请公布日期 |
1988.02.02 |
申请号 |
US19850707451 |
申请日期 |
1985.03.01 |
申请人 |
ROBERTS, JAMES C. |
发明人 |
ROBERTS, JAMES C.;MOMINEE, DAVID E. |
分类号 |
A01G25/02;B29C51/22;B29C53/48;B29C59/06;B29C67/00;B29D23/00;(IPC1-7):B29D23/00 |
主分类号 |
A01G25/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|