# US 2019/0167912 A1 · Method for producing needle-equipped outer tube and needle-equipped outer tube > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167912 A1 - Document ID: US20190167912A1 - Status: Published application - Kind: A1 - Application number: 16/269,193 - Filed: 2019-02-06 - Published: 2019-06-06 - Earliest claimed: 2013-03-07 - Assignees: Terumo Kabushiki Kaisha - Applicants: Terumo Kabushiki Kaisha - Inventors: Tsutomu SUGIKI; Masaaki KASAI; Kozo MATSUMOTO; Kenta GOTO - Web page: https://patentgrep.com/patent/US20190167912A1 ## CPC - A61M 5/343: {Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub (A61M5/322 takes precedence)} - A61M 5/28: Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle - A61M 5/3134: {characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula} - A61M 5/34: Constructions for connecting the needle {, e.g. to syringe nozzle or needle hub (connecting catheter tubes to hubs A61M25/0014)} - A61M 2005/3118: {via the distal end of a syringe, i.e. syringe end for mounting a needle cannula} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A method of manufacturing a needle-equipped outer tube includes a preheating step comprising heating a distal end connecting section to a temperature at or below a softening point of a material forming an outer tube member with a joint member inserted in a distal end connecting section of the outer tube member, and with a needle being inserted or inserted and fixed in the needle insertion hole; and a joint member welding step, performed after the preheating step, comprising thermally welding the joint member to the distal end connecting section of the outer tube member with a distal end portion of the joint member pressed toward the proximal end of the joint member by a pushing member with a pressing force in a range of 4 N to 30 N. ## Claims ### Claim 1 A needle-equipped outer tube comprising: a needle; a joint member comprising a needle insertion hole penetrating the joint member from a distal end to a proximal end, and a tapered portion in which an outer diameter decreases from a distal end side toward a proximal end side; and an outer tube member comprising a distal end connecting section having a tapered hollow portion configured to receive the tapered portion of the joint member, wherein the needle is located in the needle insertion hole, wherein the joint member comprises a thermally-welded section that is disposed between an inner surface of the tapered hollow portion and an outer surface of the needle at a location separated from a distal end of the distal end connecting section by a predetermined distance toward a proximal end of the distal end connecting section, wherein the joint member does not include a foamed portion. ### Claim 2 (depends on 1) The needle-equipped outer tube according to claim 1, wherein both the joint member and the outer tube member are formed of a thermoplastic resin material. ### Claim 3 (depends on 2) The needle-equipped outer tube according to claim 2, wherein both the joint member and the outer tube member are formed of the same thermoplastic resin material. ### Claim 4 (depends on 3) The needle-equipped outer tube according to claim 3, both the joint member and the outer tube member are formed of cyclic olefin polymer. ### Claim 5 (depends on 1) The needle-equipped outer tube according to claim 1, wherein the distal end connecting section has a contact section, which is a non-thermally-welded section that contacts the joint member but is not thermally welded to the joint member, at a location distal of the thermally-welded section, the contact section comprising a residual strain but no crack. ### Claim 6 (depends on 5) The needle-equipped outer tube according to claim 5, wherein the contact section has a phase difference in birefringence measurement due to the residual strain, and an occurrence frequency of a phase difference exceeding 800 nm in birefringence measurement is equal to or smaller than one tenth of an occurrence frequency of a phase difference smaller than 800 nm. ### Claim 7 (depends on 6) The needle-equipped outer tube according to claim 6, wherein a phase difference exceeding 900 nm does not occur in birefringence measurement in the contact section. ### Claim 8 (depends on 6) The needle-equipped outer tube according to claim 6, wherein the contact section has a peak in an occurrence frequency in a range of 100 nm to 500 nm of a phase difference in birefringence measurement. ### Claim 9 (depends on 1) The needle-equipped outer tube according to claim 1, wherein the thermally-welded section is disposed at a location separated from the proximal end of the distal end connecting section by a predetermined distance toward the distal end of the distal end connecting section. ### Claim 10 (depends on 1) The needle-equipped outer tube according to claim 1, wherein the joint member comprises a distal end portion having a cylindrical shape, and a proximal end portion comprising the tapered portion. ### Claim 11 (depends on 1) The needle-equipped outer tube according to claim 1, wherein the needle insertion hole comprises a distal end portion that has a larger diameter than a portion proximal of the distal end portion.