Vacuum assisted web drive for corrugator double backer

Details Vacuum assisted web drive for corrugator double backer Vacuum assisted web drive for corrugator double backer

1996-06-25

1998-01-13

Mansen, Michael

Advancing material of indeterminate length

With adherence or attraction of material to advancing means

By pneumatic pressure

226170, B65H 2000

Patent

active

057069948

ABSTRACT:
A double backer for curing the web bonding adhesive and drying the corrugated paperboard web utilizes a web holddown apparatus for maintaining the web in intimate drying contact with the lower heating units which does not require the use of a driven holddown belt. The web is pulled through the double backer by a downstream vacuum conveyor section comprising a single belt or a series of transport belt sections to the upper surfaces of which a vacuum is applied. The vacuum drive belt may have portions which are unsupported between laterally spaced vacuum slots, supported on a reduced friction support surface, or supported by air bearings to reduce friction and drive power requirements.

REFERENCES:
patent: 3140030 (1964-07-01), Stewart
patent: 3199448 (1965-08-01), Jaffa et al.
patent: 3321121 (1967-05-01), Nyberg et al.
patent: 3425610 (1969-02-01), Stewart
patent: 4294540 (1981-10-01), Thettu
patent: 4641771 (1987-02-01), Masuch et al.
patent: 4660752 (1987-04-01), Rikard et al.

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