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US 5,362,167 AGranted
Fiber marker including an erasable ink
AssigneeThe Gillette Company
InventorRachel M. Loftin
Life of this patent
Estimating the term…
Abstract
An aqueous-based erasable ink composition suitable for use in highlighters and other writing instruments includes a styrene-butadiene copolymer and a water-insoluble pigment. It preferably also includes a release agent and an anti-oxidant, and has a viscosity of between 10cps and 30cps.
Claims42
A method of providing an erasable marking on paper comprising
- providing a marker comprising an outer body;
- a porous writing tip at one end of said body;
- a fiber reservoir included within said body and connected to said porous writing tip;
- and within said porous writing tip and said fiber reservoir an aqueous-based, non-shear thinning erasable ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex, said latex having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%;
- and
- contacting said porous writing tip with a paper substrate to transfer said ink from said porous writing tip to said paper substrate to provide an erasable marking, wherein during said contacting said ink is delivered from said fiber reservoir to said porous writing tip via capillary action.
3 more elements
A marker comprising an outer body;
- a porous writing tip at one end of said body;
- a fiber reservoir included within said body and connected to said writing tip;
- and within said reservoir an aqueous-based, non-shear thinning ink that is erasable from 60 lb. offset printing paper, said ink having a viscosity of between 10cps and 30cps and comprising a water-insoluble colorant and a latex, said latex having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%;
- wherein when said writing tip is contacted with 60 lb. offset printing paper to mark said paper said ink is delivered from said reservoir to said tip by capillary action.
1 more element
A method of providing an erasable marking on a paper substrate comprising
- providing a marker comprising an outer body;
- a porous writing tip at one end of said body;
- a fiber reservoir included within said body and connected to said porous writing tip;
- and within said porous writing tip and said fiber reservoir an aqueous-based, non-shear thinning erasable ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex emulsion, said latex emulsion having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%;
- and
- contacting said porous writing tip with a paper substrate to transfer said ink from said porous writing tip to said paper substrate to provide an erasable marking, wherein during said ink is delivered from said fiber reservoir to said porous writing tip via capillary action when said porous writing tip contacts said paper substrate.
3 more elements
A marker comprising an outer body;
- a writing tip at one end of said body;
- a fiber reservoir included within said body and connected to said writing tip;
- and within said reservoir an aqueous-based non-shear thinning ink that is erasable from 60 lb. offset printing paper, said ink having a viscosity of between 10cps and 30cps and comprising water, a water-insoluble colorant, and a latex emulsion, said latex emulsion having a viscosity of less than about 50cps and including a styrene/butadiene copolymer having a styrene content of less than 35%;
- wherein said tip is porous and said ink is delivered from said fiber reservoir to said tip by capillary action.
1 more element
Dependencies are inferred from the claim text.