Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means
Patent
1997-07-31
1998-12-29
Bennett, Henry A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With bending, folding, winding, or wrapping means
156580, 1565833, 100154, 100211, B31F 100
Patent
active
058535276
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 holddown is provided instead by a series of parallel, flexible, closely spaced strips suspended above the web in the heating section and extending in the direction of web travel. Supplemental holddown force may be provided by banks of spring fingers supported above and in contact with the holddown strips on a transverse support rod which may be rotated to vary the amount of supplemental holddown force. Alternately, the holddown strips may comprise continuous cables in which one run of the cables rests upon the moving web to provide the web holddown and a second run includes high friction cable portions which are movable into driving contact with the upper surface of the web to pull it through the heating section, as for initial web thread up. An embodiment is also disclosed in which the holddown strips are tied together laterally to form a more stable mat-like holddown system.
REFERENCES:
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patent: 3319353 (1967-05-01), Matsunami et al.
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patent: 5256240 (1993-10-01), Shortt
patent: 5456783 (1995-10-01), Sissons
patent: 5466329 (1995-11-01), Marschke
patent: 5561918 (1996-10-01), Marschke
patent: 5632830 (1997-05-01), Marschke
patent: 5711214 (1998-01-01), Lauderbaugh et al.
Cummings James A.
Marschke Carl R.
Welch Harold D.
Bennett Henry A.
Gravini Steve
Marquip Inc.
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