Title:
【発明の名称】連続押出し成形フィルムのロ―ルを製造する方法
Document Type and Number:
Japanese Patent JP2533888
Kind Code:
B2
Abstract:
A process of manufacturing a roll of continuous synthetic thermoplastic film consisting of extruded flat film or of extruded blow-formed and flattened tubular film in which the thickness of the film is measured over the width of the film. Any striplike portion which deviates in thickness from a means thickness of the film is adjusted. The temperatures of juxtaposed temperature control sectors or the width of those portions of the slot die or of the annular die from which said striplike portions have been extruded are adjustable. When a striplike longitudinal portion having a relatively large thickness is detected in the film, the film is subsequently extruded to have a corresponding portion which has a relatively small thickness within specified thickness limits and for a length such that the two portions as superimposed in the roll have an average thickness approximately equal to the mean film thickness.
Inventors:
RAINERU HENTSUE
Application Number:
JP22384087A
Publication Date:
September 11, 1996
Filing Date:
September 07, 1987
Export Citation:
Assignee:
WINDMOELLER & HOELSCHER
International Classes:
B29C48/08; B29C48/10; B29C48/31; B29C48/325; B29C48/92; B29C53/32; B29D7/01; B29L7/00; (IPC1-7): B29C47/88
Domestic Patent References:
| JP56135028A | ||||
| JP5295768A |
Attorney, Agent or Firm:
Minoru Nakamura (4 outside)