Stock material or miscellaneous articles – Sheet including cover or casing – Complete cover or casing
Patent
1990-07-30
1991-04-09
Ryan, Patrick J.
Stock material or miscellaneous articles
Sheet including cover or casing
Complete cover or casing
428195, 428211, 4285375, B32B 900
Patent
active
050063898
ABSTRACT:
An erasable vellum adapted for imaging in xerographic copiers since it is free of volatile oil and organic solvent conventionally used for transparentizing fibrous cellulosic substrates. The erasable vellum is produced from a rag pulp paper transparentized by a polybutene emulsion, preferably incorporated in the pulp during the papermaking process. The transparentized paper substrate is given a barrier coating of an aqueous emulsion of styrene-butadiene and an overcoating of a vinyl acetate co-polymer, preferably vinyl acrylic-vinyl acetate. If desired, calcium carbonate and blue tint may be included in the substrate and a minor proportion of precipitated silicone dioxide may be included in the overcoat.
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patent: 4100329 (1978-07-01), Neithardt
patent: 4271227 (1981-06-01), Muller et al.
patent: 4569888 (1986-02-01), Muller et al.
patent: 4872777 (1989-10-01), Dalbke
patent: 4892787 (1990-01-01), Kruse et al.
patent: 4901704 (1975-08-01), Takimoto et al.
Ryan Patrick J.
Teledyne Industries Inc.
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