US1475932A - Ink eradicator - Google Patents

Description

Q1252. COMPOSITIONS,

, usefuln Patented Dec. 4, 1923.

UNITED STATES THOIAS W. GAPPON, OF NEWARK, NEW JERSEY.

INK EBAIDICATOB.

Io Drawing.

To all whom it may concern:

Be it known that I, THOMAS W. CAPPON, a citizen of the United States, residing at Newark, State of New Jersey, have invented a certain Improvement in Ink Eradicators, of which the following is a specification.

The present invention relates to an improved method for removin from paper and fabric lines and spots 0% ink or other substances as well as to a stable and relatively inexpensive composition which can be used for this purpose leaving the ink bearing surface uninjured.

It is a prominent advantage of this composition that it supplies the long felt want for a commercial one-fluid eradicator. The rapid and complete action achieved by this composition is another feature of advanta e.

The present compound is a mixture of two solutions, one of which acts as an oxidizer while the other solution which is of a nature not to be oxidized by the first named, acts as a decolorizer for the material resulting from the action of the oxidizer. For this purpose I have found that the reagents named below have the qualities named, and operate, each in its own way, to accomplish the desired results.

My preferred oxidizer is a solution of a gydplochlorite of an alkali metal preferably 'um. This solution should be fairly strong and I have found a ten percent solution quite practicable. a

Ordinary ypochlorite is generally too alkaline in its reaction, and enough dilute hydrochloric acid should be added to make the solution faintly alkaline as tested with litmus pa r.

The ot er fluid is a solution of any reagent which will not be oxidized by the h pochlorite and which has the property of forming a white or very light colored precipitate in its reaction upon the salts produced by the hypochlorite.

For this latter purpose three salts have been found useful in solution, namely, the

ortho-phosphate, the pyrophosphate and the metaphosphate of an alkali metal. These are named in the ascending order of ass.

The orthophosphate of sodium (for instance) reacts upon the iron salts resulting from the hypochlorite to form a very light Application Med December 15, 1921. Serial Io. 522,892.

yellow substance; so that, while this salt may be used for some purposes, it cannot be said to give the best results.

The pyrophosphate gives a. better result, although especially after a lapse of some time, a very faint eyish line can be detected where the er ication has taken place. This salt has in its favor, however, the fact that it is perfectly stable. Even prolonged boiling causes no decomposition.

The best results are roduced by the metaphosphate. Where t is salt is used, the resultant reaction leaves a substance as white as the paper itself, and therefore practically invisible.

The orthophosphate is, of course, the salt corresponding to orthophosphonc acid. The other two salts named are made from more or less dehydrated orthophosphoric acid, since pyrophosphoric acid results from removing one molecule of water from two molecules of orthophos horic acid, and metaphosphoric acid resu ts from removing two molecules of water from two molecules of orthophosphoric acid. As above pointed out, the salts made from more or less dehydrated acid are distinctly superior to the orthophosphates in this connection.

As an example of proportions that have been found satisfactory in practice, the following may be mentioned.

With the h chlorite solution of the stren a ove'sta e e orthopho hate of sodium (for instance) may be usec l in a saturated solution in the proportion of one part of orthophosphate to three parts of hypochlorite. The yrophosphate in saturated solution may used in the roportion of one part of the pyrophosp ate to three of hypochlorite. The metaphosphate in four or five percent solution may be used in the proportion of one of the metaphosphate to four of the hypochlorite. These proportions are by volume, and they may be greatly varied without departing from the invention, which is not limited to the proportions stated.

By using an excess of the above described mixture and leaving it for a while upon the spot or line to be eradicated, the precipitate formed may be entirely dissolved and removed s well as being decolorized, especially where the ink contains organic matter. I

This compound is not alone useful for inks, but is highly effective in removing fruit stains, blood-stains, etc.

While the ingredients above set forth have been herein described as being mixed to form a one-fluid eradicator, it is evident that the improved process forming the basis of this invention may be carried out in practice by supplying the hypochlorite in one solution and the other ingredient in a separate solution, permitting the user to form the mixture directly on the ink mark to be treated.

What is claimed is- 1. The process of eradicating ordinary inks from aper and other materials of the character esorlbed which consists in subjecting the ink line or spot to the action of an alkali hypochlorite and immediately decolorizing the resulting product by treating the same with an alkali phosphate.

2. The process of eradicating ordinary inks from paper and other materials of the character described which consists in subjecting the ink line or spot to the action of an alkali hypochlorite and immediately decolorizing the resulting product by treating the same with an alkali phosphate made from more or less dehydrated orthophosphoric acid.

3. The process of eradicating ordinary inks from aper and other materials of the character escribed which consists in subjecting the ink line or spot to the action of an alkali hypochlorite and immediately de- .MHMR LSQ LAlME R 1,475,932.-fl7t0mas W. Oappon, Newark, N. J. INK

December 4, 1923. Disclaimer filed Janu colorizing the resultin product by treating the same with an alka i metaphosphate.

4. A single fluid eradicator comprising a mixture of an alkali hypochlorite with an alkali phosphate.

5.'A single fluid eradicator comprising a mixture of an alkali hypochlorite with an alkali phosphate made from more or less dehydrated ortho hosphoric acid.

6. A single uid ink eradicator comprising a mixture of an alkali hypochlorite with an alkali metaphosphatc.

7. A single fluid ink eradicator comprising a mixture of sodium hypochlorite and sodium metaphosphate.

8. A single fluid eradicator comprising a mixture of two solutions one of which is an alkali hypochlorite and the other of which is incapable of material oxidation by the first named solution and acts as a decolormen 9. The process of eradicating inks from paper and other materials which consists in applying to the ink line or spot an alkali hypochlorite and an alkali phosphate more or less dehydrated in such a manner that both of said reagents are present upon the Inc or spot at once, substantially as described. I

In testimony whereof I have hereto set my hand on this 13th day of December, 1921.

THOMAS W. CAPPON.

Emmca'roa. Patent dated 16, 1937, by the patentee and the assignee of one-half interest, C'ard'ne Corporation. Hereb enter the following disclaimer to claim 8: Petitidiiers disclaim from the scope of claim 8 any single fluid eradicator in which the solution acting as a decolorizer is not an alkah phosphate.

[Oflicial Gazette February 9, 1937.1

DISCLAIM-ER 1,475,932.Thomas W. Gappon, Newark, N. J. INK Enamca'ron. Patent dated December 4, 1923. Disclaimer filed February 6, 1%?37, by the patentee and the assignee of one-half interest, Cardinell Oorporatwn.

Hereb Gazette March 2, 1937.]

enter this disclaimer to claim 8 of the Letters Patent.