Title:
MANUFACTURING METHOD AND APPARATUS FOR SELF-SHRINKABLE CYLINDRICAL FILM
Document Type and Number:
Japanese Patent JP2004050418
Kind Code:
A
Abstract:
To cope with fluctuations in the width and cylindrical diameter of a self-shrinkable cylindrical film without replacing not only a feed roll but also a cylindrical mold when the self-shrinkable cylindrical film different in cylindrical diameter are manufactured.
The feed roll is formed so as to be variable in length and a cylindrical shape forming member is divided along the flow direction of the film so as to slide in the lateral direction of the film. Further, an apparatus wherein both of a pressing member and an exciter are rotated is used in an ultrasonic seal device.
Inventors:
NAKAMURA SHIGEYOSHI
Application Number:
JP2002206855A
Publication Date:
February 19, 2004
Filing Date:
July 16, 2002
Export Citation:
Assignee:
NK KOGYO KK
International Classes:
B31B23/60; B29C53/50; B29C61/06; B29C65/00; B29C65/08; B65B51/10; B65B51/22; B29K105/02; B29L7/00; B29L23/00; (IPC1-7): B29C61/06; B31B23/66; B65B51/10; B65B51/22
Attorney, Agent or Firm:
Isamu Hosoi