Title:
FOLDING RULED LINE OF CORRUGATED FIBERBOARD SHEET AND DEVICE FOR FORMING RULED LINE
Document Type and Number:
Japanese Patent JP3165659
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide ruled lines capable of being folded with high accuracy.
SOLUTION: A straight folding base line 11 is formed by crushing from faces to be in sides during folding. Auxiliary lines 12a, 12b are formed by crushing at both sides of the folding base line 11 in the longitudinal direction of the folding base line 11 at predetermined distances, and the auxiliary lines 12a, 12b at both sides of the folding base line 11 are inclined in an inverted manner, and further strength at both sides of the folding base line 11 is weakened through the auxiliary lines 12a, 12b, thereby facilitating folding operation and raising folding accuracy along the folding base line 11.
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Inventors:
Takayuki Takeuchi
Application Number:
JP16747597A
Publication Date:
May 14, 2001
Filing Date:
June 24, 1997
Export Citation:
Assignee:
Nippon Die Steel Co., Ltd.
International Classes:
B31B50/25; B31F1/08; (IPC1-7): B31B1/25
Domestic Patent References:
| JP68356A | ||||
| JP970905A |
Attorney, Agent or Firm:
Bunji Kamata (2 outside)