EP0430542A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of producing flexible tube
Assignee: Machida Endoscope Co Ltd
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Filing: 1990-11-20
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Granted: —
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Expires: 2010-11-20
Abstract
Abstract There is disclosed a method of producing a flexible tube (10; 10A). A braid (12) is fitted on an outer periphery of an elongated core member (20) of a cylindrical shape. Then, a soft resin layer (13; 13A) is formed on an outer periphery of the braid, and the resin layer and the braid are joined together to form a sheath (15; 15A). The core member is removed from the sheath. Subsequently, a flex (11) in the form of a spirally-wound metal strip is inserted into the sheath. The core member can be removed from the sheath by dipping the core member in a dissolvable solution (22). <IMAGE>
Inventors
- 👤 Kenichi 328-16 Kokuki Shiraoka-Machi Kato
- 👤 Toshihide 16-15-202 Shiratori 2-Chome Nobuhara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0012; A61B; A61B1/00; A61B1/005; A61B1/0051; A61B1/0055; B; B29; B29D; B29D23/00; B29D23/001; F; F16; F16L; F16L11/00; F16L11/04; F16L11/10; A61M25/0043; A61M25/0045; A61M25/005; B29K; B29K2705/00; B29K2705/08; B29L; B29L2023/00; B29L2023/005; B29L2023/007; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A method of producing a flexible tube comprising the steps of: (a) fitting a braid on an outer periphery of an elongated core member of a cylindrical shape; (b) forming a soft resin layer on an outer periphery of said braid, and joining said resin layer and said braid together to form a sheath; and (c) removing said core member from said sheath; CHARACTERIZED by the step of inserting a flex (11) into said sheath (15; 15A) after said step (c), said flex being in the form of a spirally-wound metal strip.
Claim 2
Dependent Claim
38 words
A method according to claim 1, in which said core member (20) is made of a dissolvable material, said core member being removed from said sheath (15; 15A) by dipping said core member in a dissolving solution (22).
Claim 3
Dependent Claim
128 words
A method according to claim 1, in which said step (d) comprises winding said flex (11) on a second core member (30) so as to bring said flex into a diameter smaller than the diameter of said flex in its natural condition, said second core member having an outer diameter smaller than the inner diameter of said sheath (15; 15A), and the difference between said outer diameter and said inner diameter being greater than the double of the thickness of said flex; subsequently fixing opposite ends of said flex to said second core member; subsequently inserting said flex into said sheath; and subsequently releasing the fixing of the opposite ends of said flex to said second core member; and subsequently removing said second core member from said sheath.
Claim 4
Independent Claim
89 words
A method of producing a flexible tube comprising the steps of: (a) fitting a braid on an outer periphery of an elongated core member of a cylindrical shape; and (b) forming a soft resin layer on an outer periphery of said braid, and joining said resin layer and said braid together to form a sheath; CHARACTERIZED in that said core member (20) is made of a dissolvable material; and that said core member is removed from said sheath (15) by dipping said core member in a dissolving solution (22).
Claim 5
Dependent Claim
18 words
A method according to claim 4, in which said core member (20) is made of a glass material.
Claim 6
Dependent Claim
19 words
A method according to claim 4, in which said core member (20) is in the form of a pipe.
Claim 7
Dependent Claim
48 words
A method according to claim 6, in which opposite ends of said core member (20) are beforehand closed, said opposite ends of said core member being cut to be opened after the formation of said sheath (15) and before the removal of said core member from said sheath.
References Cited (Backward Citations)
No citation records indexed.
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