US4515489A — Overstrike ribbon for print wheels

Claim 1

Independent Claim 157 words

An overstrike ribbon capable of being advance with each printing of a letter between a high velocity printing device and a substrate through a fraction of the character width, said ribbon comprising: a synthetic-resin foil carrier; and a color-transfer layer on said carrier and bonded thereto, said color transfer layer comprising: a synthetic-resin matrix; and a color paste dispersed in said matrix, said color paste comprising: an oil vehicle consisting of a mineral oil containing 25-50% by weight of aromatic-hydrocarbons and 30-40% of the saturated bonded carbon atoms being cycloaliphatically bonded; a coloring pigment distributed in said vehicle; a cationic wetting agent in the form of at least one fatty amine sale of a fatty propylene diamine of the formula R--NH--(CH 2 ) 3 --NH 2 , where R is a long-chain fatty acid residue; and a finely divided solid filler with a high specific surface area and a particle size distribution of 0.2 to 20 microns.

Claim 2

Dependent Claim 157 words

An overstrike ribbon capable of being advance with each printing of a letter between a high velocity printing device and a substrate through a fraction of the character width, said ribbon comprising: a synthetic-resin foil carrier; and a color-transfer layer on said carrier and bonded thereto, said color transfer layer comprising: a synthetic-resin matrix; and a color paste dispersed in said matrix, said color paste comprising: an oil vehicle consisting of a mineral oil containing 25-50% by weight of aromatic-hydrocarbons and 30-40% of the saturated bonded carbon atoms being cycloaliphatically bonded; a coloring pigment distributed in said vehicle; a cationic wetting agent in the form of at least one fatty amine sale of a fatty propylene diamine of the formula R--NH--(CH 2 ) 3 --NH 2 , where R is a long-chain fatty acid residue; and a finely divided solid filler with a high specific surface area and a particle size distribution of 0.2 to 20 microns.

Claim 3

Dependent Claim 30 words

The ribbon defined in claim 1 wherein said filler is selected from the group which consists of diatomaceous earth, precipated silica, active carbon and broken, hollow microspheres and mixtures thereof.

Claim 4

Dependent Claim 90 words

The ribbon defined in claim 1 wherein said matrix is present in said layer in an amount of 8 to 12 parts by weight, said mineral oil contains 25 to 40% aromatics and is present in an amount of 10 to 18 parts by weight, said pigment is present in an amount of 5 to 10 parts by weight, said fatty amine salt is present in an amount of 1 to 5 parts by weight, and said filler is present in an amount of 5 to 10 parts by weight.

Claim 5

Independent Claim 158 words

A method of making a multiple overstrike ribbon particularly for use with print wheels, which comprises: dispersing 8 to 12% by weight of a matrix-forming synthetic resin, 10 to 18% by weight of a mineral oil containing 25 to 50% aromatic hydrocarbons, 5 to 10% by weight of a carbon black containing pigment, 1 to 5% by weight of a cationic wetting agent in the form of a fatty amine salt of a fatty propylene diamine in the formula R--NH--(CH 2 ) 3 --NH 2 , where R is a long chain fatty acid residue, 5 to 10% by weight of a filler having high surface absorbent activity and in a particle size of 0.2 to 20 microns, in 40 to 60% by weight of a vaporizable solvent to form a coating composition; applying said composition to a specific synthetic resin carrier foil; and evaporating said solvent to dryness whereby a color-transfer layer is formed on said foil.

Claim 6

Independent Claim 158 words

A method of making a multiple overstrike ribbon particularly for use with print wheels, which comprises: dispersing 8 to 12% by weight of a matrix-forming synthetic resin, 10 to 18% by weight of a mineral oil containing 25 to 50% aromatic hydrocarbons, 5 to 10% by weight of a carbon black containing pigment, 1 to 5% by weight of a cationic wetting agent in the form of a fatty amine salt of a fatty propylene diamine in the formula R--NH--(CH 2 ) 3 --NH 2 , where R is a long chain fatty acid residue, 5 to 10% by weight of a filler having high surface absorbent activity and in a particle size of 0.2 to 20 microns, in 40 to 60% by weight of a vaporizable solvent to form a coating composition; applying said composition to a specific synthetic resin carrier foil; and evaporating said solvent to dryness whereby a color-transfer layer is formed on said foil.

Claim 7

Dependent Claim 37 words

The method defined in claim 4 wherein said color-transfer layer has a thickness of about 16 microns and is applied to said foil after application of a bond-promoting antistatic layer in a thickness of 1.5 microns thereto.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-05-06	1988-11-05	1989-05-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-05-06	1992-11-05	1993-05-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-05-06	1996-11-05	1997-05-07	$7700.00	Window Closed / Lapsed

Overstrike ribbon for print wheels

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