Title:
有孔管及びその製造方法
Document Type and Number:
Japanese Patent JP4660804
Kind Code:
B2
Abstract:
A porous pipe having an excellent absorbing and draining function, a producing apparatus capable of producing a porous pipe at high speed and low cost, and a method of producing a porous pipe are provided. The porous pipe is a pipe formed by spirally winding a tape. The pipe is formed by a hole forming portion 13 for forming a recess or a notch or a hole in the tape 2 molded by a tape molding portion 11 , and the hole forming portion 13 is located between the tape molding portion 11 and a pipe forming portion 12 so that the tape 2 is molded, holes 6 are formed, and a pipe 1 is formed continuously. The holes 6 are formed into a predetermined shape by elongating the hole 6 from a side of the pipe forming portion 12 . In the pipe 1 formed thereby, a peripheral wall portion of the hole 6 is gradually thin-walled toward an outer peripheral face of the hole.
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Inventors:
Hiroyuki Masui
Tatsuya Machino
Shoji Hirao
Akihiro Fujii
Nakamata Keiji
Tatsuya Machino
Shoji Hirao
Akihiro Fujii
Nakamata Keiji
Application Number:
JP2001068412A
Publication Date:
March 30, 2011
Filing Date:
March 12, 2001
Export Citation:
Assignee:
Totaku Industry Co., Ltd.
International Classes:
A01G25/02; E02B11/00; E03F1/00; F16L9/06; E03F3/04; F16L9/12
Domestic Patent References:
| JP59104710U | ||||
| JP63118486U | ||||
| JP2134483A | ||||
| JP3187410A | ||||
| JP61093528U |
Attorney, Agent or Firm:
Masahiro Nishimori