US1248447A - Impregnating process. - Google Patents

Description

aa'rnnia r. Bee, on rnnrNsnune, rnNNs'vrvnNm. assreNon ro vvns'rrNenonsn retain lt'o Drawing.

' To all whom it may concern."

' Be it hown that T, ARTHUR l1. BROW a citizen of the United States, and a reeldent of Wilkinsburg, in the countyof Allegheny and State of Pennsylvapia, have in- "vented a new and useful lmprovement in limpregnating Processes, of which the following is a specification. 1

My invention relates to processes of impregnating cloth and other absorbent material, aildit has special reference to processes of impregnating such materials with varnish in order to render them waterproof and suitable for electrical insulating purposes. i

- The object of my invention is to provlde :an impregnatingprocess of the above indicated character by means of which absorbent materials may be impregnated. quickly and easily, and by which a saving in materials I and expense may be efiected over the processes heretofore employed.

'Cloth, paper and similar material is usually impre ated with varnish by iman mersing the fa ric in a bath composed of a drying oil and a varnish gum, boiled linseed oil and gum copal being commonly employed for this purpose. The varnish is thinned to the roper consistency for application to the abric with benzin or other suitable solvent. After one or more applications of the varnish, the fabric is baked, and the solvent is thereby evaporated and i lost.

llb

the fabric first with the drier and then with a separate application of the raw d oil; on T may first apply the drying l dg the fabric and afterward a ply the drier. At present, however, ll pre or to treat the cloth first with the drier and then with the oil. The drier absorbed by-the cloth appears to eect sufiicient polymerization of the oil in the presence of air, to coating i Specification of Letters Patent.

D MMUFACTUJBING COMPANY, A COOEATION 01E PENNSYLVANIA.

IMPREGNATING PROCESS.

- to the varnish coating produced by present methods.

Patented Wee. d, lfijl'f.

Application filed December 10, 19M. Serial No. crease.

Anysuitable manipulations may be employed for subjecting the cloth or other fabric to successive applications of the drier and the oil. For example, a Web of'clbth may be run through a bath of drier and then through one or more baths of the oil, and these operations may be carried out in an of the well. known impregnating machines. The temperature at which the operations are performed, and the length of time during which the material is immersed in the successive treating baths, do not dider materially from the ordinary conditions of fabricimpregnation and may readily be controlled by operatives having ordinary skill. After the fabric is treated in the manner described above, it is subjected to the action of dry heat by balring'it in the usual manner.

The particular substances mentioned above are referred to only for the purpose of illustration, and I do not wish to be restricted to their use. In the subjoined claims, therefore, the expressions polymerizing agent and polymerizable substance are to be understood as referring to every kind of drier and every kind of drying oil which are available for use in the arts. It is also to be understood that the claims which speci that the drying oil and drier are applie successively? are intended to, cover the modification of my process inwhich the drier and oil are applied in the order named and also the modification in which the oil is applied first and the drier afterward. In

new of the numerous modifications which y be efi'ected in my process, within the scope of my invention, desire that only suchlimitations shall be imposed upon my invention as. are indicated in the appended claims.

ll claim as my invention I. A .process of impregnating absorbent material that comprises successively applying to the said material 'a polymerizable liquid and a polymerizing agent.

2. A prmess of impregnating absorbent material that comprises applying a polymerizing agent to the said material and then applyinga .polymerizable liquid to the said material.

3. A process of impregnating absorbent material that comprises successively applylib int

through a bath of a drying oil.

ing to the said material a drying oil and a drier.

4. A process of impregnating absorbent material that comprises applymg a drier -to the said material and then applying adrying oil to the said material.

5. A process of impregnating absorbent material that comprises successively applying to the said material a raw drying oil and'a drier.

6. A process of impregnating absorbent material that comprises applying a drier t0 9. A process-of impregnating cloth that comprises passing the cloth through successive .baths of raw linseed oil and a drier.

10. A process of impregnating cloth that comprises passing the cloth through a bath sive baths of raw linseed oil and a drier,

and then applying dry heat to the treated cloth.

1:2. A process of impregnating cloth that comprises passing the cloth through a bath of a drier, then passing the cloth through a bath of raw linseed oil, and finally applying dry heat to the treated cloth.

13. A process of impregnating cloth that comprises passing the cloth through a bath of a drier, then passing the cloth through a plurality of baths of a drying oil, and finally subjecting the treated cloth to dry heat.

In testimony whereof I have hereunto subscribed my name this 28th day of Nov.,

ARTHUR L. BROWN.

Witnesses: Q

B. B. HINEs, M. C. MnRz.