US395520A - Waxed-paper bag - Google Patents

Description

1 iSpecimens.)

E. G. SPARKS. WAXED PAPER BAG. No. 395,520.

ATTOH/I/EYS.

Patented Jan. 1, 1889.

'the following NrTEn STATES EDWARD G. SPARKS, OI!

PATENT FFIJCEQ 'inoonLrx, NEW Yoax.

WAXED-PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 395,520, dated January 1, 1889.

I Application filed November 10, 1888. Serial No. 290,427. (Specimetsd New lYork, haveinvented a new and-useful ,ofwh iclr Improvemcn t in-Xlfaxed-Pap cr Bag full, clear, and

,aft (lscription. V This invention. relates to waxed-paper bags,

intended to preserve their contents from the access of air, moisture, &c.

' The invention consists in a bag made with its pores and inside surfaces charged with compressed wax, and its outsidesurfaces freed or nearly freed from the wax, as will be hereinafter fully described and claimed.

By the term wax,- as used in this specification, lmean'any suitable kind of mixture of wax,paraffine,or analogous substances suit able for rendering paper air and water proof.

The ordinary method of making waxedpaper bags consists, as described in Patent .No. 76,110, in first heating the paper bags to about 212 Fahrenheit, then immersing them in a hotwaxing bath of about 350 Fahrenheit, then placing the bags in an oven heated to about 250 to 275 Fahrenheit, and allowing the bags to remain there until, by the action of the heat, a portion of the waxing material drips off from the The bags thus made are objectionable in use, as they are heavily charged both inside and out with the wax and have a greasy disagreeable feeling and appearance upon the outside. They are,

moreover, difficult and expensive to make;

and involve the consumption of a large and unnecessary amount of wax, which is a costly material. For these reasons it has heretofore been impossible to supply the public with satisfactory waxed-paper bags.

The improved bag which forms the subject of my present invention is free from the above-mentioned difficulti'es and objections,

' and it constitutes a new and improved article of manufacture, capable of being supplied to the public at a low cost.

I give herewith a drawing representing an apparatus such as I use in the manufacture of my improved bag. The drawing is a side sectional elevation of the machine. "It consists of a suitable tank, A, for containing the wax, which is melted by steam-pipes that pass through the tank and connect with a suitable steam-gene rato r, all constructed and arranged in the ordinary well-known manner.

Suitably mounted upon the upper part of the tank A is a pair of squeczerollers B B, made adjustable in respect to each other by screws, a, or in any other proper way. The rollers B B are turned by-suitable belt-s from an ordinary driving-shaft, not necessary to be here shown. Underneath the roller B, I ar 'ange a curved deflecting-plate, O, as shown. Motion being imparted to the rollrs B B! in the direction of their respective arrows, the paper bags are fed or pushed in by hand iin- .65 (ler the surface of the wax in the direction of the arrow 1) into contact with the plate 0, which servesto direct the front end of the bag upward between the rollers *3 by which the bag" seized anddrausur. under the hot-7o" wax, and the bag, together with the adhering wax, is at the same time compressed with great force between the rollers B B, which compression has the effect to drive the wax that adheres to the outside of the paper into and through the pores of the paper to' the inside of the-bag, where, owing to the, comparatively soft nature of the paper surfaces that are here pressed together, the wax adheres and remains solidified and compressed in-an So even coat upon the said interiorfaces of the bag, and thebag, after passing through the rollers, is discharged in a finished condition therefrom. Such portions of the wax as did not passthrough the pores of the paper to the interior of the bag are pressed 01f the exterior-of the bag by the rollers and made'to' drop back into the tank... The line of the surface of the melted wax in the tank is indicated by c c. The bag thus made is found to go be comparatively free from wax upon itsexterion surfaces, while its interior surfaces that is to say, the inside of the bag-are covered with a hard and uniform coating of compressed wax, which renders the bag air and 5 water proof, and in use preserves its contents from the destructive effects of: air and moist ure.

i As a result of niy invention I dispense to a great extent with the use of wax upon the exterior of thebag and chiefly place the wax upon the inside of the bag, where it is most needed. I thus not only save a very large amount of costly waxheretofore wasted upon made. My improved bag is better the Outside of the bag but- 1 produce a better articleat'a cheaper cest than has ever been because the exterior of the bag is comparatiiely free from wax, and consequently has a better appearanceahd feel than the bags as ordinarily Waxed, while the pores of my bag are charged with compressed Wax an d the interimsurfaces-of the bag are evenly COXGI'Cd with a coating of hard compressed wax.

Havingithus frilly described my inveniibn,

1' I claim as new, and desire 1'0 secure by Lettel-s Patent- As an improved a rtieleof manufacture, the

; withiii-described paper bag having its pores I 5 i and interiorsurfaees charged with compressed Wax and its exterior surfaces freed or nearly freed from i'he wax, as set forth.

EDXVARD (1. SPARKS.

'. \Vflnesses: (t. SEDGVVICK,

EDWD. M. CLARK.

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