Title:
暗渠管
Document Type and Number:
Japanese Patent JP4575580
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a closed conduit pipe provided with water collecting narrow holes having a nearly fixed dimension to secure the predetermined filtering work for a long time. SOLUTION: This closed conduit pipe is formed of reinforcing core materials 1 made of the non-chlorine synthetic resin and spirally wound with the predetermined space and a groundwater filtration film 2 adhered to the reinforcing core materials 1 and 1 adjacent to each other to seal a space between the reinforcing core materials 1 and 1. The filtration film 2 is formed of a first film 21, which is formed by plain-weaving a drawn film material of the non- chlorine resin raw material with a tape raw material (a) as a warp cut at 0.3-3 mm and pressurizing and heating it to fuse an overlapped cross part for adhesion, and a second film 22 formed of a non-woven fabric of the non-chlorine resin material fiber. The first film 21 and the second film 22 are adhered to each other in the integrated condition impossible to be separated from each other to form the filtration film 2. The second film 22 is arranged on the peripheral side of the filtration film 2.
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| JPS5648428 | SAND PILE FORMING SYSTEM |
Inventors:
Tenno Hiroyuki
Yoshinori Tatsuda
Nobuo Shindo
Yasushi Sakane
Ken Mochizuki
Yoshinori Tatsuda
Nobuo Shindo
Yasushi Sakane
Ken Mochizuki
Application Number:
JP2000352811A
Publication Date:
November 04, 2010
Filing Date:
November 20, 2000
Export Citation:
Assignee:
Totaku Industry Co., Ltd.
International Classes:
E02D3/10; D03D1/00; D03D15/00; D03D15/02; D04H1/559; F16L1/024; F16L11/02; F16L11/12
Domestic Patent References:
| JP63203987A | ||||
| JP5263415A | ||||
| JP5077320U | ||||
| JP58199920A | ||||
| JP55092420A | ||||
| JP11247172A | ||||
| JP52032909U |
Attorney, Agent or Firm:
Yoshio Kashima