Title:
【発明の名称】管の製造方法と装置
Document Type and Number:
Japanese Patent JPH11513472
Kind Code:
A
Abstract:
PCT No. PCT/SE96/01300 Sec. 371 Date Apr. 8, 1998 Sec. 102(e) Date Apr. 8, 1998 PCT Filed Oct. 11, 1996 PCT Pub. No. WO97/13695 PCT Pub. Date Apr. 17, 1997A method of producing a rectangular cross-section cardboard tubing by passing a plurality of cardboard strips having a thermoplastic coating thereon through a heating unit so as to hear the plurality of strips and melt the thermoplastic coating. Thereafter, the plurality of heated strips are passed through a guiding unit so as to align the strips in an overlapped configuration. The aligned plurality of strips are wound around an elongated, rectangular cross-section, rotating core so as to place the plurality of strips in an overlapped, spiral configuration along the core and form a tubing. The tubing is fed along the core, and a cutting unit cuts the tubing into lengths.
Inventors:
Andre Asson, Ingmar
Application Number:
JP51500197A
Publication Date:
November 16, 1999
Filing Date:
October 11, 1996
Export Citation:
Assignee:
Andre Asson, Ingmar
International Classes:
B29C53/58; B31C3/00; B31C99/00; B65D19/26; B65D19/00; F16L9/16; (IPC1-7): F16L9/16; B65D19/26
Attorney, Agent or Firm:
Tadashi Wakabayashi (4 others)