| 发明名称 |
|
| 摘要 |
Medical bags composed of plastic sheets jointed at their edges and a fluid charging/discharging tube sealed between the edges of the sheets have sufferred, due to the use of a mold having smooth and straight land conforming with the surface of the tube, various problems such as formation of burrs by the displaced molten plastic material on the inner side of the product bag, weakening or generation of pinholes around the free end of the tube attributable to excessive thinning of the sheets and so forth. According to the invention, these problems are overcome thanks to the use of a mold which has a central first land of an inside diameter slightly smaller than the sum of the tube diameter and thicknesses of sheets and at least one additional land provided at each side of the first land, the additional lands having inside diameters increasing successively and slightly greater than that of the first land. In the welding conducted by a high-frequency wave, the molten plastic material displaced from the region surrounded by the first land is forcibly displaced and confined in the regions surrounded by the additional lands so that the tube and the sheets are welded in a sealing manner without permitting formation of burrs while avoiding excessive thinning of the sheets around the free end of the tube. |
| 申请公布号 |
DE3238294(C2) |
申请公布日期 |
1986.04.30 |
| 申请号 |
DE19823238294 |
申请日期 |
1982.10.15 |
| 申请人 |
TERUMO K.K., TOKIO/TOKYO, JP |
发明人 |
SHINNO, KOJI, FUJINOMIYA, SHIZUOKA, JP |
| 分类号 |
A61J1/10;A61J1/05;B29C65/00;B29C65/02;B29C65/04;B29C65/82;B65D33/38 |
主分类号 |
A61J1/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
