Blank structure with indented fold lines for a cardboard contain

Details Blank structure with indented fold lines for a cardboard contain Blank structure with indented fold lines for a cardboard contain

1985-06-20

1986-05-06

Price, William

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

229 31, 229 17R, 229DIG4, B65D 540

Patent

active

045866503

ABSTRACT:
A blank structure for liquid having horizontal and vertical fold lines, bordered by specifically designed indented fold lines, the depth of grooves of the fold lines are gradually decreased toward the crossings of the respective fold lines. Thus, cracks or pinholes at the corners of the folded blank due to the folding stress in case of forming a container can be completely prevented.

REFERENCES:
patent: 1876063 (1932-09-01), Kronenberger
patent: 3098599 (1963-07-01), Hagan
patent: 3481527 (1969-12-01), Jacke
patent: 3727825 (1973-04-01), Troth

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