Method for corrugating paperboard

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

156210, 264286, B31F 120

Patent

active

041405641

ABSTRACT:
Improved method for corrugating paperboard, wherein a web of a corrugating medium is treated with a solid lubricant for a release agent and supplied to heated corrugating rolls to which a water mist has been applied evenly over the rolls. The web is shaped between the rolls by the application of pressure from the rolls and steam formed from the water spray. The availability of steam at the nip of the corrugating rolls provides improved flute formation and the solid lubricant allows the corrugated paperboard to release from the corrugating rolls without damage to the flutes. Standard corrugating equipment is enabled to operate at higher production rates and to accept lower quality paper for corrugating. Equipment is provided to maintain a supply of solid lubricant in a water suspension for application to the paperboard, preferably via a water spray directed on the corrugating rolls.

REFERENCES:
patent: 1796542 (1931-03-01), Schoo
patent: 2029390 (1936-02-01), Rodgers
patent: 3004880 (1961-10-01), Lord
patent: 3103459 (1963-09-01), Kane
patent: 3676247 (1972-07-01), Morris et al.
patent: 3834961 (1974-09-01), Terry
patent: 3849224 (1974-11-01), Hintz et al.
patent: 3892613 (1975-07-01), McDonald et al.

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