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US 5,203,926 AGranted
Cleanser and desensitizer for printing equipment
OwnerLouis E. Bondurantinventor
Life of this patent
Estimating the term…
Abstract
A cleansing solution for cleaning components of a planographic printing press to include the printing plate, which includes a solution of a humectant, a buffer, a glycol ether and an organic solvent to which anhydrous aluminum silicate and gum arabic have been added.
Claims7
A cleanser for use with printing plates and chrome rollers comprising:
- 2% to 25% by weight of an alcohol selected from the group consisting of isopropyl alcohol, ethyl alcohol and n-propyl alcohol;
- 0.5% to 5% by weight of a buffer comprising a mono basic alkali metal phosphate selected from the group consisting of monopotassium phosphate, monoammonium phosphate and monosodium phosphate;
- 1.5% to 25% by weight of a polyhydric alcohol humectant selected from the group consisting of ethylene glycol, glycerin and propylene glycol;
- 0.5% to 28% by weight of ethylene glycol monobutyl ether;
- 0.2% to 7.5% by weight of finely powdered anhydrous aluminum silicate;
- 0.2 to 5% by weight of gum arabic;
- 0.2% to 12% mineral spirits;
- and
- the balance being water.
6 more elements
A method for cleaning a printing plate to thereby increase its effectiveness of printing quality comprising the step of wiping the printing plate with a cloth having been wetted with a solution having
- 2% to 25% by weight of an alcohol selected from the group consisting of isopropyl alcohol, ethyl alcohol and n-propyl alcohol;
- 0.5% to 5% by weight of a buffer comprising a mono basic alkali metal phosphate selected from the group consisting of monopotassium phosphate, monoammonium phosphate and monosodium phosphate;
- 1.5% to 25% by weight of a polyhydric alcohol humectant selected from the group consisting of ethylene glycol, glycerin and propylene glycol;
- 5% to 28% by weight of ethylene glycol monobutyl ether;
- 0.2% to 7.5% by weight of powdered anhydrous aluminum silicate;
- 0.2 to 5% by weight of gum arabic;
- 0.2% to 12% mineral spirits;
- and
- the balance being water.
6 more elements
Dependencies are inferred from the claim text.