US1270250A - Reinforced impervious paper and method of making same. - Google Patents

Description

A. F. SCHENKELBERGER.

REINFORCED IMPERVIOUS PAPER AND METHOD OF MAKING SAME.

APPLICATION FILED JULY l8. WM.

1 ,270,250. Patented June 18, 1918.

. Z Q- W wrappin PATENT OFFICE.

ntnnn'r r. scnmmnmnnee o uassn cnusn'r'rs, essrenon 'ro sernrecx PAPER MILLS, or nnocigro myglnasnonusn'rrs, A connonA'rIoN or MASSACHU- SETTS.

nnmroncnn mrnnvloqs PAPER AND ETHOD or MAKING SAME.

Specification 01' Letters llatent. Patented June is, rare.

Application iued July 1;, i914. s mlno. 851,701.

- To all whom it may concern:

resident of Quincy, county of Norfolk, Commonwealth of Massachusetts, have invented an Improvement in Reinforced Impervious Paper and Methods of Making Same, of which the following description, in connection with the accompanying drawmgs, 1s a specification, like characters on the drawings representing like parts in each of the several views. a

This invention relates to wrapping, 11ning, or sheathing material composed of aper coated or impregnated with composition to render it waterproof or impervious and with a reinforcing element of textile fiber applied to and embedded in the material with which the paper is coated or impregnated The invention also has to do with an improved method for producing such and like material cheaply, and preferab y to a large extent from material that would otherwise be waste. In accordance with'my invention I treat the paper 'with a composition that leaves a temporarily sticky surface, this composition when it isdesired to make the wrapping impervioiis, being preferably asphaltum or like pitch.;-To this sticky surface I apply unspun textile fiber, preferably cotton or flax fiber as it leaves the carding machine, or loose waste fiber. In some cases another sheetof paper may be laid upon'the fiber covered surface, thus forming a two-ply pa per with the reinforcing fiber between. The invention will be better understood from the following detailed description taken in connection with the accompanying drawings and will be thereafter pointed out in the appended claims.

Referring to the draw1ngs: Figure 1 is a diagrammatlc perspective showing one way in which my Invention may be carried out;

Fig. 2 is a similar view showing another form of the invention; and

Fig. 3 is a similar view showing still another embodiment thereof.

A paper web 10 as it is fed along in any desired manner (not shown) is treated with an application of impre means shown as a roll 11 which through atmg and coating ma-' terial such as aspha tum pitch by suitable an intermediate roll is supplied from a pitch pot'12. The sticky coated surface of the material indicated at 13 then hasthe loose unspun fiber, such as carded cotton fiber applied thereto. As seenin Fig. lithis fiber 1s applied in a thin gauzy web 14 for instance as it comes from the dofi'er drum of a carding machine and it may pass under and be pressed on to the sticky surface of the paper by a roll '15. In the form of the invention shown in Fig-=2 the fiber ap lied to the sticky surface of the paper is oose waste fiber which may be blown on to the surface by an air blast from a blower mouth 16. It will be understood that while the thin sliver web 14 in the one case and the light filmy fibers blown upon the material in the other case, are apparently weak and unsubstantial, still when these are embedded in the sticky surface of the paper, the full tensile strength of each individual fiber is obtained, and these fibers are distributed more evenly in every direction than would be the case with spun and woven fiber. In Fig. 3 I show a web 17 composed of assembled ribbons or slivers of unspun fiber which is pressed on to the sticky surface by a roll 18. This 'of course has considerably more body than the fiber applications of the two precedingl forms and is suitable for use in making eavier wrappings. The application of fiber asdescribed in each form of the invention is desirable not only in that it reinforces and strengthens the paper, but also partially covering and protecting the sticky when only one paper layer is employed, in

surface so that it will not smear or be face for the purpose of reinforcing the'paper and protecting the sticky surface. I

therefore refer to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having described my invention, what I claim as new and desire to secure by Letters Patent is: I

1. The herein described method which consists in treating paper with .a composition to produce a stlcky surface, applying loose unspun textile fiber upon such surface to reinforce the paper and protect said surface, and applying a second layer of sheet material to said surface to make a two ply wrap ping.

2. llhe herein described method which consists in treating paper with a pitch co mposition to render the same IIIIPBIVIOIIS Wlllll to render it waterproof with a sticky) herein described method which consists in treating paper with composition surface, applying carded unspun textile fi er to said surface, and applying a second layer of paper to said surface to make a two-ply wrappmg. i

i. A wrapping or like material composed of two layers of paper with an intermediate filling of sticky composition to render the same Waterproof, and loose disconnected textile fiber filaments v embedded in said sticky composition for the purpose stated.

In testimony whereof I have signed my 4 name to this specification in the presence of two subscribing witnesses.

ALBERT F. SCHENKELBERGER.

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