Coating apparatus – Solid applicator contacting work – With work-handling or work-supporting
Reexamination Certificate
1999-11-19
2001-08-07
Edwards, Laura (Department: 1734)
Coating apparatus
Solid applicator contacting work
With work-handling or work-supporting
C118S261000, C162S265000, C162S361000
Reexamination Certificate
active
06270577
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to grease, oil, wax and solvent resistant coated base products having superior soak through resistance. The present invention further relates to an apparatus and method for the application of a coating to a base product to impart grease, oil, wax and solvent resistance. More particularly, the present invention relates to high solids, for example high solids pigmented latex, coated base products and an apparatus and method for applying high solids coatings to base products.
BACKGROUND OF THE INVENTION
Coatings to impart grease, oil, wax or solvent repellency to certain base products have been known for some time. Demand for such coated products has grown enormously in recent years. In order to meet this demand, new coating compositions, coated base products, and apparatus and methods for applying such coatings to base products must be constantly developed and improved.
Additionally, manufacturers of coated base products strive to improve the physical properties of the base products, for example, improved rigidity, not only to produce superior products, but also to improve the safety of the manufacturing process. For example, paperboard is prone to frequent web breaks on the printing press. This can be a fire hazard. For instance, if a web break should occur in the dryer section of the printing operation a fire could be initiated.
Manufacturers have also been striving to develop coated base products that display no pinholes. This fosters the use of the coated base products in new applications. For example, because the coating displays no pinholes, the coating is impervious to ink. Not all inks are approved by the FDA for contacting food. This makes it is possible to utilize coated base products with all over print designs in applications in which a printed portion of the base product could contact food products, irrespective of whether the ink used is approved by the FDA for contacting food.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to an improved coated base product that overcomes the limitations and disadvantages of the prior art.
Further the invention is directed to an apparatus and method for producing such a coated base product.
To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, in one embodiment, the invention relates to a coated base product having a cellulosic substrate having on at least one surface thereof, a coating composition having at least about 5 percent by weight of non water soluble polymer, and up to about 90 percent by weight of clay.
In another embodiment, the invention relates to a method of applying high solids coatings to a surface of a base product utilizing a calender stack. The method comprises providing a rotatable coating roll opposing a feeding roll defining a nip portion through which a base product is passed; providing a cleaning blade in contact with the coating roll; and providing a calender box in contact with the coating roll to apply the coating.
In still a further embodiment, the present invention relates to an apparatus for applying high solids coatings to a surface of a base product utilizing a calender stack. The apparatus comprises a rotatable coating roll opposing a feeding roll defining a nip portion through which a base product is passed; a cleaning blade in contact with the coating roll; and a calender box in contact with the coating roll.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.
It is understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
REFERENCES:
patent: 1908275 (1933-05-01), Youngchild et al.
patent: 2157386 (1939-05-01), Emmey
patent: 2213117 (1940-08-01), Blackmore
patent: 3607486 (1971-09-01), Jacks et al.
patent: 3762365 (1973-10-01), Herzog
patent: 3918397 (1975-11-01), Thettu
patent: 4012543 (1977-03-01), Ranger et al.
patent: 4308320 (1981-12-01), Schiller
patent: 4344379 (1982-08-01), Roberts
patent: 4358481 (1982-11-01), Walstén
patent: 4370389 (1983-01-01), Ogura et al.
patent: 4603060 (1986-07-01), Mitsuda et al.
patent: 4844002 (1989-07-01), Yasui et al.
patent: 4857126 (1989-08-01), Soremark et al.
patent: 4949667 (1990-08-01), Yoshida et al.
patent: 4973441 (1990-11-01), Keller
patent: 5203920 (1993-04-01), Plomer
patent: 5328511 (1994-07-01), Beisswanger
patent: 5378497 (1995-01-01), Johnson et al.
patent: 5792260 (1998-08-01), Rantanen et al.
patent: 5938895 (1999-08-01), Hirvonen
BASF Corporation Technical Information Sheet re:“Acronal S504—Binder for Coating Paper and Paperboard”—1991.
Product Description Sheet for Cargill Industrial Corn Starch, 1993.
Technical Bulletin PA-19, “KELGEN Sodium Alginate for Surface Treatment of Paper and Paperboard,” Kelco (Division of Merck & Co., Inc.).
Hartjes Timothy Paul
Sandstrom Erland R.
Shanton Kenneth John
Swoboda Dean Patrick
Edwards Laura
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Fort James Corporation
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