Title:
MANUFACTURE OF CONTAINER
Document Type and Number:
Japanese Patent JP3013069
Kind Code:
B2
Abstract:
PURPOSE: To eliminate a crack at a molded product by providing a pertially cut part between adjacent pertitions to be molded of a molding wavy pulp sheet provided on a molding pulp cardboard, and thermally pressure molding it.
CONSTITUTION: Many wavy parts 12 are arranged in a sectional shape not recovered at the ordinary temperature at molding pulp cardboards 10, 10 passed between step rollers, and the cardboards 10, 10 are varied to molding wavy pulp sheets 14, 14. partially-cut parts 46 are formed between six adjacent partitions 38 to be molded of the sheets 14, 14. For example, several partially-cut parts 46 are provided as small holes perpendicularly to a conveying direction of the sheets 14, 14 between the partitions 38 to be molded. On the other hand, metacollapsible parts 48 are provided as sew lines in a conveying direction of the sheets 14, 14. Thus, a concentration of stresses of an upper mold and a lower mold is absorbed by the parts 46, 46 at the time of thermally pressurizing the sheets 14, 14, and a crack is eliminated at the molded part.
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Inventors:
Masaaki Okabe
Application Number:
JP22057693A
Publication Date:
February 28, 2000
Filing Date:
August 12, 1993
Export Citation:
Assignee:
Okabe Engineering Co., Ltd.
International Classes:
B31B50/59; (IPC1-7): B31B43/00
Domestic Patent References:
| JP50110182A | ||||
| JP5756254A |
Attorney, Agent or Firm:
Nobuyoshi Murayama