US2220231A - Tobacco pouch and method of making same - Google Patents

Description

Nov. 5,- 1940. P. M. GILFILLAN TOBACCO POUCH AND METHOD OF MAKING SAME Filed `AprilV 28, 19,39

Y E Rw Q a www v i NVENTOR Pad M G/,ZZZQ 4 maa/Mv ATTORNEYS Patented Nov. 5, i340 l UNITED STATES TOBACCO POUCH AgD METHOD OF MAKING Paul M. Gilnuan, Mount Vernon, ohio, 'assignor to Shellmar. Products Company, Mount Vernon, Ohio, a corporation of Delaware Application April 28, 1939, Serial No. 270,488

7Claims.

This invention relates to'an improved type of tobacco package and to the method by which the package is formed.

Within recent years considerable effort has acteristic of maintaining the tobacco in substan- `tially the same condition in which it is initially packed for extensive periods of time.

Another object of -the invention i-s to provide a tobacco package in which transparent halogenated rubber material such as rubber hydrochloride is employed to produce a pouch having'a patch type pocket and being backed by paper or paper and' foil.

Still another object of the invention is to provide a tobacco package in which a relatively thin, transparent rubber hydrochloride backing sheet has thermoplastically joined to it a smaller patch portion of relatively heavy transparent rubber hydrochloride, the backing sheet being supported by a laminated paper or other type of material which will add strength and folding qualities to the container.

These and other objects will be observed upon a consideration of the following specification and by reference to the accompanying drawing, in which o Fig. 1 is a perspective view of a pouch formed in accordance with the invention; and

Fig. 2 is a sectional view taken along line 2-2 of Fig. l.

In the production of the improved tobacco 45 pouch an initial step consists in the lamination of a thin sheet In o f transparent rubber hydrochloride to a sheet Il which preferably is composed of paper or fabric material. In producing this lamination it is possible to use various types of adhesives, but ordinarily it will be preferred to utilize an adhesive having a rubber base. A

number of such adhesives are available.

After lamination of the relatively 'thin film of transparent rubber hydrochloride to the web of 55 paper it then is desirable to laminate the outer face of the paperto a web of foil indicated at I2. Again, it is possible to use various types of adhesives for producing the adhesion between the paper and foil, these adhesives being well known in the art. The outer face of the foil I2 may 5 b provided with any desired type of printing. It also is desirable `to print in reverse theiinder side of the sheet I0 prior to laminating it to the paper. This printing may include advertising matter or the like.

The composite web formed by the lamination of the sheet of thin transparent rubber hydrochloride to the paper and the lamination of foil to the opposite side ofthe paper is cut into pouch blanks. and there is subsequently secured to the l5 inner face of the sheet Ill a patch type of pocket indicated at I3 in the drawing. This relatively/ small sheet constituting the pocket portion of the package consists of a sheet of transparent rubber hydrochloride which preferably is of greater thickness than the sheet I0 to which it is attached.

In producing the completed pouch, blanks of the 4laminated sheets are brought into registration with the relatively small sheets I3 so that lthe lower edges of the latter register. with thev lower edges of the thin rubber hydrochloride sheet IIl. The adjacent edges of the thin" rubber hydrochloride and the relatively heavy rubber hydrochloride sheets then are brought into contact with a hot plate which produces a thermoplastic bond between 'the two sheets of rubber hydrochloride to complete the formation of the pouch. 'I'he temperature of the plate and the time of the contact with the edges of the materials to be joined may vary considerably, it being sun'icient to produce an edge heating effect that causes the two films of rubber hydrochloride to become integral. A bond of this type may extend inwardly a distance comparable to the thickness of one of the lms, so that the pocket formed by the union of the two materials utilizes substantially the entire space between the transverse edges thereof.

'Ihe height of thesheet I3 will. determine the capacity of the pouch and the lip portion formed by the extension of the laminated sheets is sufciently long to enable the extension to'be folded over against the sheet I3. 'The extension of the laminated material may be greater than the height. of the sheet I3 so that it may be folded completely around the sheet I3 and in overlapped relation with respect to the back of the laminate material.

After completion of the formation of the pack- 55 age, tobacco is loaded in the pocket between the sheets I3 and III and the mouth of the package may be raised to a temperature which renders the material slightly tacky to produce a moisture- 5 Lproof bond therebetweensulciently strong to preserve the moist condition of the tobacco. In ei.'- fecting the seal between the sheets I3 and I0 it is preferred that a stack of these blanks be thermoplastically sealed together at their edges in a unitary operation. In such an operation a hot plate is brought adjacent the edges of a plurality of the pouches so as to distribute the heating operation throughout the stack.

The patch type of pocket provided by the sheet I3 makes a highly desirable tobacco pouch. The pouch is inexpensive and Itis not necessary to use but a small portion of the relatively heavy rubber hydrochloride. The pouch has a relatively large capacity for tobacco, due to the type of seal eected between the sheets I3 and I0 and is sufciently durable to withstand normal use without being broken apart.

Various changes may be made in the container and its method of manufacture without departing from the scope of the invention as defined in the appended claims. For instance; the strengthimparting sheets laminated to the relatively thin sheet I0 may be other than described. If desired. a material such as transparent cellulose sheeting may be substituted for the toil. In some cases itwill be desirable to omit the foil. Fabric may be substituted for the paper sheet, or natural or artificial leather may be employed as the strength-imparting backing member.

I claim:

1. The method of forming a tobacco pouch, which comprises laminating a sheet of transparent rubber hydrochloride to a supporting sheet, and thermoplastically patching three edges of a smaller sheet of unlaminated rubber hydrochloride t'o one end of said first named sheet o! rubber hydrochloride.

2. The method of forming a tobacco pouch,

which comprises laminating a sheet of transparent rubber hydrochloride to one side of a sheet of paper, laminating the opposite side of said sheet of paper to a layer of metallic foil, and thermoplastically uniting to three edges oi' said sheet oi rubber hydrochloride a pocket-forming, relatively 5 small sheet of unlaminated rubber hydrochloride.

3. The method of forming a tobacco pouch, which comprises laminating a relatively thin sheet o1 transparent rubber hydrochloride to one side of a sheet of paper, positioning on said sheet of rubber hydrochloride a smaller sheet oi.' relatively heavy unlaminated rubber hydrochloride having three edges adjacent three edges oi said first named sheet of rubber hydrochloride, and bringing the adjacent edges of rubber hydrochloride adjacent a heating element to produce a thermoplastic bond therebetween.

4.The method oi forming a tobacco pouch, which comprises laminating a sheet of rubber hydrochloride to a supporting sheet, and welding onto said sheet of rubber hydrochloride a pouchforming portion consisting of a relatively small sheet of rubber hydrochloride.

5. A tobacco pouch, comprising a relatively thin sheet of rubber hydrochloride, a sheet of paper laminated to one side of said sheet of rubber hydrochloride, and a patch pocket of rubber hydrochloride integrally joined to three edges of said nrst named sheet of rubber hydrochloride. A

6. A tobacco pouch, comprising a laminated backing member composed of an outer sheet of foil, an intermediate sheet of paper, and an inner sheet of relatively thin rubber hydrochloride, said backing member being integrally joined at one end to a pouch-forming smaller sheet of 35 relatively heavy rubber hydrochloride.

'7. A tobacco pouch, comprising a laminated backing member composed of paper and 'a sheet of relatively thin rubber hydrochloride, and a pouch-forming section of relatively heavy rubber hydrochloride integrally bonded to three edges of the backing member.

PAUL M. GILFIILAN.

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