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Publication numberUS893043 A
Publication typeGrant
Publication dateJul 14, 1908
Filing dateApr 2, 1908
Priority dateApr 2, 1908
Publication numberUS 893043 A, US 893043A, US-A-893043, US893043 A, US893043A
InventorsHarry W Westerberg
Original AssigneeHerbert Watson J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 893043 A
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Description  (OCR text may contain errors)







Specification of Letters Patent.

Patented July 14, 1908.

To all whom it may concern:

Be it known that I, HARRY W. WESTER- BERG, a citizen of the United States, and a resident of the borough of Brooklyn, whose post-office address is 306 Prospect Place, in the borough of Brooklyn, in the city and State of New York, have invented certain new and useful Improvements in Package- Openers, of which the following is a specification.

My present invention relates to opening devices for card-board packages of various kinds and has especial reference to sealed packages, such as those which contain the cereal roducts now so well-known and eX- tensive y advertised.

It has for its object to provide a device which can be applied at the factory after the package is otherwise completely made up, by means of which the package may be opened without leaving the usual unsightly and unsanitary flap, and may be conveniently closed again so as to be at all times practically airtight; and yet is without projecting parts, so that the ordinary methods of packing for shipment may be employed without change.

To accomplish the endspointed out I construct a ring of metal having projecting teeth which may be forced through the cardboard of the package, leaving a circular piece which is separated from the rest of the surrounding card-board by perforations closed by the teeth. By preference a small projection from the circumference is made to serve as a handle so that when it is desired to open the package thering may be revolved and the teeth will act as cutters to separate the portions of the card-board between the perforations. The shape of the teeth is such as to leave a slight lost motion after the ring is seated in place, as Will be more fully explained hereinafter. Where the device is made of sheet metal, the teeth are slightly bent back at the root, so as to form a narrow shoulder around the inner circumference of the ring against which the portion of the card-board which is cut out seats itself, the friction against the teeth holding it in place and the ring itself closing the joint between this circular openin and the rest of the package. When cast, t e teeth may be set back to attain the same result.

The accompanying drawings show embodiments of my invention.

Figure 1 is a perspective of a completed package with the device applied thereto. ig. 2 1s a plan, Fig. 3 is a cross section on the line 3, 3 of Fig. 2; Fig. 4 is a side elevation and Fig. -5 a pers ectlve of a completed device. Figs. 6 and 7 are res ectively a side elevation and plan of a modi cation.

In Fig. 1 I show the device applied to a package. It willbe'seen that it is seated at against the exterior surface and as the metal of which it iscomposed is quite thin, resent methods of packing are unmodified. he device may be made of thin sheet steel or cast metal, and in practice it is not imperative to shar en the teeth after they are struck out by the ie, since that operation leaves the edges roughened and sharpened sufficiently for the purposes of the invention. If a heavier grade of metal be used, however, the shar ening of the cutting edges of the teeth will be found desirable. In practice the device forms an airtight and consequently dust-tight opening and closing device, eflicacious for the purpose in view.

In Figs. 2 to 5, A indicates the flat metal ring and B the teeth ;'B is a portion of the tooth inset from the inner periphery of the ring so as to form a shoulder; 72 indicates the portion of the tooth which is Wider than the root thereof and b shows that the tooth is sharpened. Where the device is made of thin enough material this would be unnecessary. D is the handle. The effect of this spear-head formation of the teeth is to cut a series of slots around the circumference of the circle, leaving the card-board within the ring attached to the wall of the package by narrow strips of material and giving the ring a circumferential lost motion, so that it is more readily turned when it is desired to open the package. The slots are closed not only by t e teeth but by the flat surface of the ring which presses up against them so that practically speaking the package remains air-tight and dust-proof, or at least substantially so.

In the form of device indicated in these figures the material for the teeth is taken from the inside of the ring, but in Figs. 6 and 7, I indicate that the stock for the teeth may be taken from the outside, as shown by the dotted line in Fig. 7. In this case the handle D is made Wider and as indicated at B the material for one of the teeth maybe taken. from the handle.

All of the forms of the device shown in these drawings are well adapted to be struck up with dies from sheet metal, preferably from thin sheet steel, the device being afterwards nickel-plated or not as may be desired. I may, however, form the article of thin cast metal and this is an eflicacious method. It is obvious that in this case the root of the tooth need not be folded back upon the ring since the tooth will project directly from the body of the ring. This form has the advantage of seating the metal of the ring directly against the package so that the slots cut by the teeth are securely sealed. If desired, the device may be covered by thin paper which will serve to secure it firmly in place and make the package damp-proof; but in general this will not be necessary.

Having thus described my invention what I claim and wish to protect by Letters- Patent of the United States is:

1. In a device for opening packages which are composed of card-board or the like, a flat ring adapted to be seated against the package, provided with teeth projecting through the wall; the teeth spaced apart so as to leave the portion of the package-wall within the ring attached to the remainder of the wall until rotation of the ring cuts the attachment, as described and for the purposes set forth.

2. In a device for opening packages which are composed of cardboard or the like, a flat ring seated against the package and provided with the teeth projecting through the package-wall; the teeth displaced from the inner periphery of the ring so as to leave a shoulder are composed of cardboard or the like, a flat ring seated against the package and provided with teeth projecting through the packagewall, the teeth wider in the middle than at the root, so that the device has a lit tle circumferential lost motion when seated in place.

4. In a device for opening packages which are composed of card-board or the like, a llat ring seated against the package and provided with teeth projecting through the wall thereof; the teeth wider at the middle than at the root, and being set back from the inner periphery of the ring to form a shoulder.

5. In a device for opening packages which are composed of cardboard or the like, the combination with the fiat ring and the teeth arranged to cut through the wall of the package, of a handle for the ring.

6. In a device for opening card-board packages, the combination with the flat ring and the teeth arranged to give a circumferential lost motion, of a handle projecting from the outer periphery of the ring.

In witness whereof, I have hereunto set my name in the presence of two witnesses.


T. J. JOHNSTON, IRVING M. Onnrnen'r.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5884837 *Sep 29, 1997Mar 23, 1999Tetra Laval Holdings & Finance S.A.Opening arrangement
US6009625 *May 19, 1998Jan 4, 2000Ixl Manufacturing Company, Inc.Hole forming assembly for irrigation tubing
US7818885Feb 5, 2008Oct 26, 2010Brolex, LlcDevice for performing surgery
Cooperative ClassificationB65D5/42