| 发明名称 |
Blow molded tubing with special holes and method of making same |
| 摘要 |
A method of making blow-molded perforated tubing and the tubing made by said method is provided. In the method of the invention, hollow-walled protuberances are blow molded into the side of the tubing as the tubing is formed and perforations are formed by cutting the hollow-walled protuberances.
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| 申请公布号 |
US4655986(A) |
申请公布日期 |
1987.04.07 |
| 申请号 |
US19840677626 |
申请日期 |
1984.12.03 |
| 申请人 |
DAYCO PRODUCTS, INC. |
发明人 |
COTHRAN, LIGGETT A.;MORGAN, EDWARD L.;STEVENS, ROBERT E.;HOLDEN, HOMER N.;ENSLEY, R. NEAL |
| 分类号 |
B26F1/00;B29C49/00;E02B11/00;(IPC1-7):F16L11/11 |
主分类号 |
B26F1/00 |
| 代理机构 |
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