Thermal transfer ribbon
First Claim
1. A thermal transfer ribbon for use in nonimpact printing comprising a substrate and a thermal transfer layer which is formed from a mixture comprising the combination of a wax emulsion containing as essential ingredients about 20 to 45% oxidized, isocyanated hydrocarbon wax, about 35 to 65% paraffin wax mixture of solid crystalline hydrocarbons of the methane series derived from the paraffin distillate portion of crude petroleum, about 5 to 30% carnauba wax and about 3 to 15% ethylene vinyl acetate copolymer resin in a solvent solution and a fluorescent color coating containing as essential ingredients about 5 to 15% orange fluorescent pigment, about 1 to 10% white fluorescent pigment, and about 15 to 30% color toning pigment, the fluorescent pigments in the thermal transfer ribbon having a fluorescence greater than 10 postage meter units, the thermal transfer layer providing a transferred image of a color having a measure of lightness (L) in the range of 40 to 50, a measure (a) on the red-green axis and a measure (b) on the blue-yellow axis, and a total color difference value (Δ
- ) of the transferred image not to exceed 10 when using the formula (Δ
)=√
(Δ
L)2 +(Δ
a)2 +(Δ
b)2 as measured on the Hunter Color Meter.
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Accused Products
Abstract
A thermal transfer ribbon includes a substrate and a layer thereon comprising a mixture of an emulsion essentially consisting of hydrocarbon, paraffin and carnauba waxes and an acetate copolymer, and a fluorescent color coating essentially containing a fluorescent pigment, a color toner and a filler.
54 Citations
15 Claims
-
1. A thermal transfer ribbon for use in nonimpact printing comprising a substrate and a thermal transfer layer which is formed from a mixture comprising the combination of a wax emulsion containing as essential ingredients about 20 to 45% oxidized, isocyanated hydrocarbon wax, about 35 to 65% paraffin wax mixture of solid crystalline hydrocarbons of the methane series derived from the paraffin distillate portion of crude petroleum, about 5 to 30% carnauba wax and about 3 to 15% ethylene vinyl acetate copolymer resin in a solvent solution and a fluorescent color coating containing as essential ingredients about 5 to 15% orange fluorescent pigment, about 1 to 10% white fluorescent pigment, and about 15 to 30% color toning pigment, the fluorescent pigments in the thermal transfer ribbon having a fluorescence greater than 10 postage meter units, the thermal transfer layer providing a transferred image of a color having a measure of lightness (L) in the range of 40 to 50, a measure (a) on the red-green axis and a measure (b) on the blue-yellow axis, and a total color difference value (Δ
- ) of the transferred image not to exceed 10 when using the formula (Δ
)=√
(Δ
L)2 +(Δ
a)2 +(Δ
b)2 as measured on the Hunter Color Meter. - View Dependent Claims (2, 3)
- ) of the transferred image not to exceed 10 when using the formula (Δ
-
4. A thermal transfer ribbon for use in nonimpact printing comprising a substrate and a thermal transfer coating which is formed from a mixture comprising the combination of a wax emulsion containing as essential ingredients about 20 to 45% oxidized, isocyanated hydrocarbon wax, about 35 to 65% paraffin wax mixture of solid crystalline hydrocarbons of the methane series derived from the paraffin distillate portion of crude petroleum, about 5 to 30% carnauba wax and about 3 to 15% ethylene vinyl acetate copolymer resin in a solvent solution and a fluorescent color coating containing as essential ingredients about 5 to 20% fluorescent pigment, about 1 to 10% of one toning pigment, and about 5 to 20% of another toning pigment, the fluorescent pigment in the thermal transfer ribbon having a fluorescence greater than 10 postage meter units, the thermal transfer coating providing a transferred image of a color having a measure of lightness (L) in the range of 40 to 50, a measure (a) on the red-green axis and a measure (b) on the blue-yellow axis, and a total color difference value (Δ
- ) of the transferred image not to exceed 10 when using the formula (Δ
)=√
(Δ
L)2 +(Δ
a)2 +(Δ
b)2 as measured on the Hunter Color Meter. - View Dependent Claims (5, 6)
- ) of the transferred image not to exceed 10 when using the formula (Δ
-
7. A thermal transfer ribbon for use in nonimpact printing comprising a substrate and a thermal transfer coating which is formed from a mixture comprising the combination of a wax emulsion containing as essential ingredients about 20 to 45% oxidized, isocyanated hydrocarbon wax, about 35 to 65% paraffin wax mixture of solid crystalline hydrocarbons of the methane series derived from the paraffin distillate portion of crude petroleum, about 5 to 20% carnauba wax, about 3 to 15% ethylene vinyl acetate copolymer resin, and about 1 to 25% hard, color stable styrene copolymer resin in a solvent solution and a fluorescent color coating containing as essential ingredients about 5 to 20% of one fluorescent pigment, about 3 to 10% of another fluorescent pigment, about 5 to 20% of one toning pigment, and about 1 to 10% of another toning pigment, the fluorescent pigments in the thermal transfer ribbon having a fluorescence greater than 10 postal meter units and a peak wavelength in the range of 600 to 650 nanometers, the thermal transfer coating providing a transferred image of a color having a measure of lightness (L) in the range of 40 to 50, a measure (a) on the red-green axis and a measure (b) on the blue-yellow axis, and a total color difference value (Δ
- ) of the transferred image not to exceed 10 when using the formula (Δ
)=√
(Δ
L)2 +(Δ
a)2 +(Δ
b)2 as measured on the Hunter Color Meter. - View Dependent Claims (8, 9, 10, 11, 13)
- ) of the transferred image not to exceed 10 when using the formula (Δ
-
12. A thermal transfer ribbon for use in nonimpact printing comprising a substrate and a thermal transfer coating which is formed from a mixture comprising the combination of a wax emulsion containing as essential ingredients about 20 to 45% oxidized, isocyanated hydrocarbon wax, about 35 to 65% paraffin wax mixture of solid crystalline hydrocarbons of the methane series derived from the paraffin distillate portion of crude petroleum, about 5 to 20% carnauba wax and about 3 to 15% ethylene vinyl acetate copolymer resin in a solvent solution and a fluorescent color coating containing as essential ingredients about 5 to 20% of red-orange fluorescent pigment, about 1 to 4% of a yellow fluorescent pigment, about 3 to 10% calcium carbonate filler, and about 5 to 10% of a red toning pigment, the fluorescent pigments in the thermal transfer ribbon having a fluorescence greater than 10 postal meter units and a peak wavelength in the range of 600 to 650 nanometers, the thermal transfer coating providing a transferred image of a color having a measure of lightness (L) in the range of 40 to 50, a measure (a) on the red-green axis and a measure (b) on the blue-yellow axis, and a total color difference value (Δ
- ) of the transferred image not to exceed 10 when using the formula (Δ
)=√
(Δ
L)2 +(Δ
a)2 +(Δ
b)2 as measured on the Hunter Color Meter. - View Dependent Claims (14, 15)
- ) of the transferred image not to exceed 10 when using the formula (Δ
Specification