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특허 상세정보

Apparatus and method for making flexible tubing with helically wound heating conductor

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H04B-003/40    F24H-001/10   
미국특허분류(USC) 392/478 ; 392/480 ; 392/472
출원번호 US-0250173 (1994-05-27)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 58  인용 특허 : 0
초록

A helically wound and helically ribbed plastic tubing incorporating an electrically conductive heating wire and an apparatus and method for making the tubing are disclosed. A plastic ribbon is wound about an axis into a tube with one edge of each lap overlapping and heat-bonded to an edge of the preceding lap as the tubing is rotated; a conductive wire is embedded in the ribbon; and a bead is applied and heat-sealed onto the tubing, encapsulating the conductive wire during rotation of the tubing, providing a unitary structure including a conductive wire ...

대표
청구항

A thin-walled, flexible and collapse-resistant plastic tubing having a substantially smooth bore for conducting tidal air flow and a helical outer support bead, the tubing including an electrical resistance conductor for heating tidal air flow in said bore, said tubing comprising: a flexible tubing wall formed of elongate thermoplastic ribbon having opposite side edges, said ribbon being helically wrapped on itself to overlap said opposite side edges a certain amount forming a helical lap joint whereat opposite side edge portions of said ribbon are heat-...

이 특허를 인용한 특허 피인용횟수: 58

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