US1749317A - Compound for cleaning - Google Patents

Description

Patented Mar. .4, 1930 UN TE STATES PATENT OFFICE CHARLES G. CKEVALIEQ OI BALTIMORE, MARYLAND conrom iron cnmnmo 80 Drawing. Application filed flay 5,

I tinlplate, or other rolled sheet metal.

11 the processes used for manufacturing tinplate, the finished sheets generally have a thin film of oil adhering thereto. Such a film prevents successful soldering operations on articles made from such oily sheets, and

also prevents a perfect coatin or printed impressions being made on suc articles.

One methad used for cleaning oily. sheets has been to place such sheets in a machine 15 containing a batch of the: coarser part of ground wheat iwhich is generall called middlings. At first this works fairly well, but after about twenty minutes these middlings lose their cleanin the sheets come outwith a thin film of oil or grease still adhering thereto. Many shipments are returned to the manufacturers for re-cleaning, because of such films.

newal of the middlings requires'the sto ping of'the machine, the removal of the o d' exhausted batch and its replacement with a fresh batch.' Such frequent renewals are obviously objectionable and increase the cost of cleaning. a A new type of cleaning machine has been perfected which permits the replacement of an exhausted batch with a fresh one, without stopping the machine.

I ave a small amount of powdered diatomaceous earth, a new result is obtained. With my compound the interval between renewals of the middlings may be increased from twenty minutes to five hours, or about fifteen times, with satisfactory results. The action of this small amount of earth seems 'to be to scrape the oil film from the plate, and that when so removed this oil is much more readily absorbed by the middlings. The amount of this diatomaceous earth which I have found to give satisfactory results is from one per- "cent to' five percent, by weight, to eachbatch ofmiddlings. I

power, with the zoresult that if the process 1s continued longer With the machine formerly used each rediscovered that w1th the addition of absorbent material to which has 'diatomaceous earth. I 2. An oil removing and surface pohshin 1920. Serial Io. sauna.

Diatomaceous earth also has a ca acity for absorbing 011 and grease, and, i desired,

larger proportions of it .may be used in ,my

COIVOUJI ith my compound the tinplate sheet may be freed entirely from oil or grease,'leaving the surface in the pro er condition for sub"- sequent soldering or ecorating of articles made therefrom. With the advantage of this more perfect cleaning and polishing of the sheets, there is obviousl a great saving in the cost over using midd ings alone;

' The cost of my process is further reduced because after the middlings and powdered diatomaceous earth have taken up all the oil which the compound is capable of removin satisfactorily, it may be sold as a cattle fee as alm'o-middlings. r

* arious modifications ofv my invention within the scope ofthe claims may be made,

for instance the method may be used. to clean articles which are not in the shape of sheets, and to remove any other coating which the middlings are capable of absorbing.

Neither the earth, middlings or oil can be readily se arated or recovered and used again, an in view of the market for this cattle feed, there seems to be no need for doing so.

Varin conditions such as the smoothness of the 'ro led sheets upon which the tin coating is formed, the quality; and temperature of the oil, make it necessaryto vary the period of use of my compound to meet such conditions.

What I claimis:

1. An oil removing and surface polishing compound consisting of a finely divided oil been added compound consisting of middlin to whic from one to five percent pf diatomaceous earth has been added. 3. An oil removing and surface polishing 9 compound consisting of middlings and diato- I maceous earth.

In testimony whereof Ihereunto aifix my signature. i

g CHARLES G. CHEVALIER. 10o