US2169638A - Container - Google Patents

Description

muss KtrtHtNUi: owun RUU Aug. 15, 1939. P. M. GILFILLAN CONTAINER IEIIE JEIIIE USE Original Filed Jan. 5, 1938 INVENTOR.

n 5 km do m Patented Aug. 15, 193$ UNl Paul M. Gan, Mount Vernon, Ohio, assignor to Shear R-oducts Oompany, Mount Vernon, Ohio, a corporation of Delaware Oriel application Jan 5, 1938, Serial No.

183.41%. Divided and this application July 16, 1938, Serial No. 219,631

The present invention relates to the manufacture of containers composed of a material such as transparent cellulose sheeting or Cellophane and refers in particular to the production of a duplex material from which containers of this sort are produced.

A principal object of the invention is the provision of a duplex tube or container blanks consisting of two webs of Cellophane or the like secured together by narrow strips of an adhesive along the longitudinal edges thereoi and provided with means for holding the ends of the webs in contiguous relation without the entrapment of air.

Another object oi the invention is to provide a container blank formed of two adjacent sheets of material, at least one of which is transparent and printed in reverse with a design, the two sheets of material being secured together along their edge portions.

Still another object of the invention is to produce container material by printing a plurality of transversely spaced designs on a relatively wide web of cellulose sheeting, printing a longi- J tudinal line of adhesive between said designs,

printing spaced transverse lines of adhesive between certain of said designs. adhering said web to a second web and cutting the combined webs into container blanks with the longitudinal lines of adhesive forming the edges oi the blanks and the spaced transverse lines of the adhesive forming the ends thereof.

This application is a division oi my earlier appiication, Serial No. 183,417, filed January 5, 1938.

These and other objects will be olmerved from a consideration of the follo 1 description of a preferred ement or the invention and by reference to the accompanying drawing in which Fig. 1 is a l z natic view showing the various steps in the process of manufacturing the combined or duplexsleeve;

Fig. 2 shows the appearance oi the'duplex webs before the webs are cut into container blanks;

Fig. 3 is a perspective view showing how the container lengths are wrapped about a hollow mandrel;

Fig. e is a view similar to Fig. 3 showing the completed container formed about the hollow mandrel; and

Fig. 5 is a perspective view showing an adhesive applicator of the type employed in producing the improved type of duplex material.

As shown in Fig. l the process involves the passage of a continuous web it of transparent cellul material such as Celiop 1 or cellulose (m. 22ii-61) acetate through an intaglio printing machine in which the web initially is printed by one or more color units and provided with adhesive. The initial printing unit consists of an etched cylinder H which rotates in a color both it provided with a volatile lacquer ink and a doctor blade it which removes the excess ink from the etched cylinder. A conventional impression cylinder to is positioned above the printing cylinder and the web passes between the two cylinders to receive the deposit of the quick-drying ink. Quick-drying intaglio inks of this sort are well known and there is no necessity for giving any particular formulas. Generally, the ink consists of low viscosity nitro cellulose, gums, resins, plasticizers and pigments contained in a. suitable organic solvent of high volatility. It will be understood that any number of printing units of this sort may be utilized for providing the desired color or multicolor on the printed web. In a preferred embodlm ment of the invention the cylinder i i is etched so as to provide recurring oppositely-positioned designs as shown in Fig. 2. That is, the d "ABC is oppositely positioned in its adjacent occurrences. The purpose of this will be understood irom the description occurring hereinafter.

The second intaglio unit shown in Fig. 1 consists of a printing cylinder 85, color bath it, doctor blade IT, and impression roller it. This color unit is or substantially the same construction as the first described colorunit and the etchedintaglio cylinder It is provided with an etched design as shown in Fig. 5. This etched design consists of relatively narrow and continuous side portions l9, relatively wide continuous circular portions 20, and spaced transverse sections it. The liquid medium in the bath i6 is adhesive in character and may or may not be colored. In one satisfactory embodiment of the invention the liquid medium in the color bath is is a transparent relatively quick-drying adhesive oi the type which forms a satisfactory adhesive between two webs oi' transparent cellulose sheeting.

Immediately after the application of the adhesive by the etched cylinder it the web it is brought in contact between compression rollers 22 and 23, with a second web 2% taken from roll is composed 01' a transparent cellulose sheeting,

Howevenin some cases it will be found desirable to substitute a translucent or opaque material for thetranlpsrentwebandtheinnerlayer of the duplex material may be composed of foil, glassine ortheiike. Whereanopaquematerialisused it is ddrable to provide window openings through which the emtents of the container may be observed, theppenings preferably being in predetermined podtion with respect to the printed design on the exterior web.

The roll II is subjected to a slitting and cutting operation in which the composite web is slit along the center of the relatively wide longitudinally extending laminated lines 21 which are deposited by the etched portions 20 of the cylinder II, it being understood that some of the glue line remains on each of the slit sections to provide three container-forming sections as shown in Fig. 2. Thereafter the blanks are cut transversely along the center of the broken transverse glue lines II which are deposited by the broken edge lines iii of the cylinder II.

This transverse cutting operation severs three container blanks from the slit sections. Each of these blanks consists of two layers of trans-- parent cellulose sheeting laminated by continuous glue lines along their longitudinal edges and provided with broken or segmental glue lines along, their transverse edges, the outer of the laminated sheets having on its under side printed designsreversely positioned at opposite ends of the blank.

The multlng blank is folded evenly about the end of a hollow mandrel as shown in Fig. 3 to form continuous front, bottom and side walls and with the printed designs appearing on opposite sides. Then, the edges of the blank extend beyond the hollow mandrel and the blank is provided with lines 29 of thermo-plastic adhesive which are applied to the edge portions of the outside transparent cellulose sheet, More particu larly, marginal lines of thermoplastic adhesive are deposited on the outside of the sheet of transparent cellulose along the length of one side and the width of the bottom, the lines preferably belng extended slightly beyond the bottom. The thermoplastic adhesive then is dried and the blank is. folded about the hollow mandrel as shown in Pig. 4. Heat and pressure then are applied over the folded over portions to form a complete container. The edge portions of the blank extend somewhat beyond the hollow mandrel, and in the folding operation the bottom sections initially are folded adjacent the mandrel. Then, the glued side sections are folded against the mandrel. The unglued sections finally are folded in overlapped relation with respect to the thermoplastic lines of adhesive to complete the folding operation.

It will be noted that the resulting container has a continuous seal along the longitudinal edges of the composite web and that the outside of the outer section of the container is adhered to the inside of the inner section of the composite material, Also, the open ends of the finished container have spaced glue lines adhering to the inner and outer sections of the composite container.

The winding of the composite web into roll form has a beneflcialeifect upon the container which subsequently is produced from the webs.

Apparently. the formation from a roll has an equalizing effect upon the shrinkage and stretch of the two materials which result in the formation of uniform containers.

'Ihe sectional transverse glue lines by which the upper edge: of the inner and outer webs are so cured together are advantageous from many standpoints. In the winding of the composite into the roll 28 fewer difficulties are encountered where the composite webs i and 24 are transversely secured together in spaced intervals by sectional glue lines than where no such transverse securernents are provided. The sectional lines likewise are considerably more satisfactory than continuous transverse glue lines which cause wrinkles in the stock as it is wound into roll form and is apt to result in the entrapment of air within the interior of the composite sleeve or tube. The sectional transverse glue lines prevent changes of appearance in the composite container due to atmospheric changes and provides a substantially unitary edge for the open end of the container.

As before stated, the inner web may be composed of various materials. One of the webs may be plain Cellophane and the other web moistureproof Cellophane. The number of combinations of material possible is almost unlimited. After formation of the container about the hollow mandrel the mandrel may be removed and the container filled and sealed or the container may be filled through the hollow mandrel. Many variations are possible in the method and corn tainer. The composition of the ink and adhesives may vary considerably as may the shape and size of the container blanks. The various changes which may be made without departing from the invention are intended to be included in the appended claims,

I claim:

1. A container, comprising two sheets of mate rial adhered together along their longitudinal edges and partially along their transverse edges, said sheets being folded to form continuous side and bottom walls with the marginal portions: thereof in overlapped relation, and said marginal portions being sealed together by a thermoplastic adhesive with the outer surface of the outer sheet being adhered to the inner surface of the inner sheet.

2. A container, comprising two sheets of material adhered together along their longitudinal edges and partially along their transverse edges. said sheets being folded to form continuous side and bottom walls with the marginal portions thereof in overlapped relation, and said marginal portions being sealed together by a thermoplastic adhesive with the outer surface of the outer sheet being adhered to the inner surface of the inner sheet, predetermined spaced adhesive on said transverse edges placed in a manner to allow any entrapped air to be expelled, thus resulting in a uniformly smooth surface.

3. A container blank, consisting of two layers of transparent cellulose sheeting laminated by continuous glue lines along their longitudinal edges and provided with broken or segmental glue lines along their transverse edges.

PAUL M. GILFILLAN.

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