Bendable corrugated paperboard

Details Bendable corrugated paperboard Bendable corrugated paperboard

2005-06-07

2005-06-07

Mai, Tri M. (Department: 3727)

Envelopes, wrappers, and paperboard boxes

Paperboard box

C229S930000, C229S931000

Reexamination Certificate

active

06902103

ABSTRACT:
This invention provides a paperboard with an improved score line, the method for making the improved score line, and the apparatus for imparting the improved score line. The score line makes the process of folding a flat paperboard into a corner an easier and more consistent process. The score is a V-shaped groove fashioned from a bar score line flanked by two parallel slit cut lines. The method for creating the score line includes utilizing different scoring hubs for bar scoring and slit scoring the paperboard. The apparatus for creating the bar score is a four shaft slitter-scorer having multiple shafts in series, wherein each shaft has at least one hub for slit scoring, bar scoring or supporting the paperboard.

REFERENCES:
patent: 1288132 (1918-12-01), Nagle
patent: 1758230 (1930-05-01), Lange
patent: 2173927 (1939-09-01), Allen
patent: 2319641 (1943-05-01), Speir, Jr.
patent: 2458867 (1949-01-01), Messersmith
patent: 3199763 (1965-08-01), Anderson
patent: 3481813 (1969-12-01), Wiggers
patent: 3526566 (1970-09-01), Mcilvain, Jr. et al.
patent: 3955677 (1976-05-01), Collingwood
patent: 5322215 (1994-06-01), Roccaforte
patent: 5888183 (1999-03-01), Ruthenberg et al.
patent: 2002/0166887 (2002-11-01), Matsuoka

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