US2355493A - Container cap - Google Patents

Description

Aug. 8, 1944.

l. L. WILCOX ET AL CONTAINER CAP Filed July 12, 1937 I NVENTORS i W ATTORNEYH'.

Patented Aug. 8, 1944' CONTAINER CAP Isaac L. Wilcox and Robert F. Huntley, Fulton,

N. Y., assignors to OswegoFalls Corporation, Fulton, N. ;Y., a corporation of New York Application July 12, 1937, Serial No. 153,084

2 Claims.

such as paper, with the blank being scored to form overlappingpleats in the marginal portion of the blank when the same is applied to the bottle or container, and which pleat portions are secured together by means of adhesive.

The invention has as an object a cap of the,

type referred to which, while beingsecured together and held on the bottle by means of adhesive, is not deleteriously afiected by moisture, and whereby the pleated portions will not become unfastened to permit displacement of the cap from the bottle.

The invention has as a further object a particularly economical and efilcient method of making .such a cap.

The invention consists in the novel features and in the combinations and constructionshereinafter set forth, and in the method hereinafter described and claimed.

In describing this invention, reference is had to the accompanying drawing in which like characters designate corresponding parts in all the views.

Figure 1 is a top plan view of the blank which has been processed and is ready to be formed and applied to the bottle.

Figure 2 is a side elevational view showing the scored portion of the blank partially folded to form the skirt portion of the cap.

Heretofore bottle caps of the cover-all or hood type have been formed from" paper and like material, and have been scored to form overlapping pleats in the skirt portion of the cap, and which pleats have been secured together in overlapping relationship by means of an adhesive. Insofar as we are aware, the use of adhesives for this purpose has not been satisfactory, due to the fact that the marginal edge port-ion of. the blank, or the bottom edge portion of the skirt of the cap, has a tendency to absorb water or moisture which renders the skirt portion of the cap soft and flexible, and also causes the adhesive to part from the overlapping portions of the cap, with the result that the pleats open up and the cap is readily displaced from the bottle. If the cap or blank is processed in the conventional manner by waxing, or the like, adhesive subsequently applied to the blank will not stick to the same.

.To overcome these disadvantages paper caps have been coated with a stiffening binder which,

'when cooled, becomes hardened and sets the cap in folded form on the top of the bottle. However, such caps require being processed in an oven, or other heating medium, to soften the binder just previous to the formation and application of the cap to the bottle and thereafter it is necessary to mechanically hold the cap in contracted form on the bottle until the binder has sufiiciently cooled. This results in an expensive and cumbersome machine which operates at comparatively slow speed. I

Accordingly, while it is desirable to secure together the overlapping portionsof hood caps by means of adhesive, such practice has not heretofore been commercially practical, due to the loosening of the adhesive from the cap because of the waxed surface thereof, or more particularly because of moisture absorbed into the cap through the lower edge thereof and .through the weakened portions where the "pleat are folded.

, By our invention, the cap is not only rendered moisture repellent, but the adhesive is'firmly bound to the cap.

The cap may be of any conventional formation, and as here shown in Figure 1 the blank may be octagonal having an octagonal center portion In defined by score lines H which are arranged in register with the outer side edges of the blank. The marginal portion of the blank, extending from the score lines H to the periphery of the blank, constitutes the skirt portion of the cap, and is provided with score lines l2 extending from the corners of the central portion [0 to the outer corners of the blank. Score lines l3 also extend from the corners of the central portion I0 across alternate skirt sections I 4 to the periphery of the blank, and at right angles to the score lines II. The score lines I2, I3 define triangular portions I5. The score lines ll, l-3 are formed on one side of the blank, and the score lines 12 on the opposite side of the blank. When the blank is formed into a cap and applied to the bottle, the triangular portions l5 fold inwardly toward each other and overlap the adjacent portion of the skirt sections l6. Preferably, the triangular portions I5 are folded inwardly on the inner side ofthe cap adjacent the neck of the bottle, as illustrated in Figure 2.

After the blank is scored, the peripheral margin of the same is immersed into a thin, penetrating solution until the peripheral margin 20 of the blank is impregnated with the solution. This solution is in the nature of a fiber binder impregnation, and acts to bind the fibers of the blank into an integral mass, thus preventing the entrance of moisture. To this end, it is prefer- 'able that the solution be of moisture repellent material, although this is not necessary if it is a good fiber binder. Subsequently, the impregnated portions of the triangular sections II and the adjacent portions of the sections it are coated with adhesive, as indicated at 2|. That is, the portions of the pleats which are in overlapping relationship, when the cap is applied to the bottle, are coated with adhesive. The impregnating solution applied to the margin 20 preferably possesses the further characteristic of having an amnity for, or of forming a base for, the adhesive and also preferably possesses the characteristic of being flexible and elastic when desired. If the impregnating solution possesses an amnity for the'adhesive, the adhesive is securely bound to the overlapping pleat portions.

We have found that an impregnating solution formed of benzol and rubber possesses all of the desired characteristics and is particularly satisfactory for this use, and an adhesive of the rubber cement order, including a rubber base, combines well with such impregnating solution and possesses the further advantage that it will not adhere to other substances. That is, the blanks may be arranged in stack formation, and the adhesive on the portions 2! will not adhere to the bottom of the cap next above in the stack.

It will be appreciated by those familiar with the art that the blanks may be of any form or size, and any desired scoring may be employed to form overlapping pleat portions.

The blanks-are applied to the bottles or containers by any suitable mechanism having relative axial movement with the container, whereby the skirt sections of th blank are bent downwardly and contracted about the top of the container, and the overlapping portions of the skirt pressed together. Due to the impregnation of the lower portion of the cap skirt, the same is rendered moisture-repellent, and the bond between the adhesive and the cap is not affected when the cap is subjected to moisture, such for example as "packing the bottles in cracked ice while being delivered to the customer, and accordingly the cap will not become unsealed or loosened from the top of the bottle. Also, the impregnation of the margin of the blank permits the use of a less costly grade of paper.

What we claim is: k 1. A hood cap for bottles and the like comprising a blank formed of thin sheet fibrous material scored to form overlapping pleat portions when the cap is applied to the bottle, the peripheral margin 0! said blank being impregnated with a thin, penetrating solution of benzol and rubber, and the overlapping portion of certain of said pleats being coated with a substance substantially non-adhesive with said fibrous material and strongly self-adhesive at normal temperature, and said substance readily combining with said benzol and rubber=solution.

2. A hood cap for bottles and the like comprising a blank formed of thin sheet fibrous material scored to form overlapping pleat portions when the cap is applied to the bottle, the peripheral margin of said blank being impregnated with a thin, penetratingsolution of benzol and rubber, and the overlapping portion of certain of said pleats being coated with a substance including a rubber base, which substance is substantially non-adhesive with said fibrous material and strongly self-adhesive at normal temperature, and said substance readily combining with said impregnating benzol and rubber solution.

ISAAC L. WILCOX. ROBERT F. HUN'I'IEY.

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