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Publication numberUS2538920 A
Publication typeGrant
Publication dateJan 23, 1951
Filing dateNov 18, 1946
Priority dateNov 18, 1946
Publication numberUS 2538920 A, US 2538920A, US-A-2538920, US2538920 A, US2538920A
InventorsShumann Harold F
Original AssigneeShumann Harold F
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Display bag and method of making the same
US 2538920 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

- Jan. 23, 1951 H. F. SHUMANN 2,533,920


Patented Jan. 23,1951

DISPLAY BAG AND METHOD OF MAKING SAME Harold F. Shumann, Pittsburgh, Pa. Application November 18, 1946, Serial No. 710,628


2 Claims.

It is an object of this invention to provide a display bag for containing nuts, popcorn and and will maintain this relationship whether the bag is in a horizontal or vertical position.

connection with the annexed drawings in which:

Fig. 1 is a diagrammatic perspective View 11- lustrating the method of making improved bags.

Fig. 2 is a partial plan showing the rear wall of a completed bag.

Fig. 3 is a section on the line 3-3 of Fig. 2.

Fig. 4 is a section similar to Fig. 3 but showing a modified construction, and

Fig. 5 is a perspective view of the finished bag cut away to illustrate particularly the bottom construction.

For the purpose of this disclosure the term. transparent material includes not only such truly transparent material as heat sealing cellophane but any heat sealable sheet material which is Sufiiciently transparent to permit inspection of the contents through a single ply of the material. This includes numerous synthetic films and laminated or coated heat sealable glassine sheets. The films, however, need not be heat sealable since this invention, at least in its article aspect, does not require the heat sealing property. From the standpoint of manufacture, however, heat sealing is greatly to be preferred.

When nut meats or other small confections are sold in small individual packages, it is desirable that the contents of the package be spread out in a relatively thin, even layer so that, so far as pos- In the case of a bag formed of all flexible material, however, such display packaging has not been satisfactory for the reason that once the package is removed from the horizontal plane to any approximately vertical position, the contents tends to slide into a thick, compact pile in the bottom of the bag. This distorts the package, adversely affecting its appearance and largely nullifying its display value.

The prior art has recognized this defect and has sought to overcome it by the addition of stiffening members inserted between the plies of the display bag or otherwise secured to the bag. .Such stiffening members, however, add greatly to the cost of the package which, after all, must be used almost entirely in the low pric retail field where packaging cost bears heavily as a matter of percentage against the packers selling price of the filled package.

Referring now to Fig. 1, there is illustrated a mandrel I 0 around which is formed a tube l2 having a front wall I4 and a rear wall It. The rear wall It contains a longitudinal seam l8. At the forward end of the mandrel l0 a portion M of the front wall 14 and a portion iii of the rear wall l6 are folded over the end of the mandrel I0 to lie against the rear wall It. The details of machines capable of forming bags in this manner are no part of the present invention, but it may be mentioned that suitable devices of this type are disclosed in the U. S. Patent No. 2,346,- 191 to Schultz, dated April 11, 1944, and in U. S. Patent No. 2,192,527 to Corcoran, dated March 5, 1940.

The mandrel H] has formed in its upper surface in contact with the rear wall It a plurality of corrugations 20. It will be understood that the mandrel it receives suitable vertical support under the front wall M. A heat bar 22 lies above the rear wall It and has in its adjacent face corrugations 24 arranged to mate with the corrugations 26 in the mandrel It]. When heat bar 22 is pressed against the rear wall i6, corrugations 26 (Fig. 2) are formed by the coaction of the grooves 20 of the mandrel l6 and the grooves 24 of the not bar 22. These corrugations are also formed in the longitudinal seam l8 and in the folded over closure [4 and I 5. At the same time the seam i8 is sealed the portion I5 is sealed to the Wall l6 and the portion M is sealed to the portion I 6'.

When the heated bar 22 is withdrawn from contact with the wall 46 the finished bag is drawn off of the mandrel Hi. It then has a corrugated rear wall [6 and a plain front wall I4. The corrugations 26 on cooling will be found to have acquired a permanent set which contributes to a very distinct stiffening of the rear wall l6 sufficient to hold the bag in flattened condition against any sliding of contents to the bottom of the bag when the filled bag is in a vertical position.

While grooves 20 have been illustrated in the mandrel I0, it will be suflicient for many materials to use a mandrel formed of felt or fiber board and having a plane surface facing the rear bag wall 16. Under such circumstances, and

with a suitably chosen mandrel, the corrugations 24 of the hot bar 22 will sufficiently impress themselves upon the material of the mandrel to secure a corrugated effect on the rear bag wall to.

Fig. 4 illustrates a construction where still more stiffening of the rear wall is required. In this case the bag has a plain front wall 30 and a corrugated rear wall 32. The rear wall 32, however, throughout its entire area is formed of two plies 34 and 36 which, in effect, constitute a longitudinal seam overlapped to the full width of the rear wall. This in turn supplies extra material in the end closure and further stiffens that por tion of the bag. 7

It will be appreciated from the foregoing that, from the standpoint of the article, the corrugations could be formed by theapplication of starch, glue, or other stiffening material to the rear wall followed by the drying of such material while the rear wall is maintained in a corrugated condition. From the standpoint of manufacture, however, and as noted above, heat sealable material is greatly to be preferred.

While I have disclosed certain specific forms of the invention herein for purposes of illustration, it should be understood that many changes and modifications thereof can be inade without departing from the spirit of the invention as defined in the appended claims;

I claim:

1. A display bag formed from a single, integral sheet of at least translucent, flexible heat sealable material, said bag having a front wall and a rear wall, said rear wall containing a seam formed by heat sealing together overlapping margins of said sheet, an end of said bag including portions of said front and rear walls being folded upon and heat sealed to said rear wall, said front wall being optically uninterrupted to permit inspection of the contents, said rear wall including said seam, and said folded end portion being corrugated with a plurality of self-sustaining corrugations serving to hold said rear wall in substantially unchanged relationship to said front wall whether the filled bag occupy a vertical or horizontal plane.

2'. A bag as set forth in claim 1 in which the overlap of the margins in the rear wall is sufficient to make the entire rear wall of two ply thickness.


REFERENCES CITED The following references are of record in the file of this patent:


Patent Citations
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US1834570 *Nov 27, 1928Dec 1, 1931Dobeckmun CompanyContainer
US1849065 *Nov 5, 1930Mar 15, 1932Paper Patents CoContainer
US2344369 *Feb 14, 1942Mar 14, 1944Ivers Lee CoPackage
US2349111 *May 31, 1941May 16, 1944Rambold AdolfMethod of making flexible bags
AU118344B * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2790591 *Apr 20, 1954Apr 30, 1957Milprint IncCommodity bag for automatic filling machines
US3144197 *Feb 20, 1963Aug 11, 1964Shell Oil CoPlastic bag
US4078717 *Mar 23, 1977Mar 14, 1978Great Plains Bag CorporationBag with opening means
US4353497 *Feb 13, 1981Oct 12, 1982Mobil Oil CorporationFree-standing thermoplastic bag construction
US5501757 *Jul 1, 1994Mar 26, 1996Sumitomo Bakelite Co., Ltd.Process for production of a bag having linear ribs
US5554093 *May 30, 1995Sep 10, 1996Dowbrands L.P.Flexible thermoplastic containers having a visual pattern thereon
US5618111 *May 15, 1996Apr 8, 1997Dowbrands L.P.Flexible thermoplastic containers having visual pattern thereon
US7003928Feb 21, 2003Feb 28, 2006Jcs/Thg, LlcAppliance for vacuum sealing food containers
US7076929Sep 30, 2003Jul 18, 2006Jcs/Thg, LlcAppliance for vacuum sealing food containers
US7131250Oct 14, 2004Nov 7, 2006Jcs/Thg, LlpAppliance for vacuum sealing food containers
US7231753Jul 17, 2006Jun 19, 2007Sunbeam Products, Inc.Appliance for vacuum sealing food containers
US7401452Nov 6, 2006Jul 22, 2008Sunbeam Products, Inc.Appliance for vacuum sealing food containers
US7454884May 4, 2007Nov 25, 2008Sunbeam Products, Inc.Appliance for vacuum sealing food containers
US8763796 *Jan 7, 2013Jul 1, 2014Victor A. GrossmanDental floss dispenser and method of operation thereof
US20040065051 *Feb 21, 2003Apr 8, 2004Patterson Justin C.Appliance for vacuum sealing food containers
US20050044814 *Sep 30, 2003Mar 3, 2005Patterson Justin C.Appliance for vacuum sealing food containers
US20070068120 *Nov 6, 2006Mar 29, 2007Jcs/Thg, Llc.Appliance for vacuum sealing food containers
US20070204561 *May 4, 2007Sep 6, 2007Sunbeam Products, Inc.Appliance for vacuum sealing food containers
EP0117730A2 *Feb 23, 1984Sep 5, 1984T.C. Manufacturing Co., Inc.Flat bottom plastic bag and method of manufacture
EP0117730A3 *Feb 23, 1984Aug 7, 1985T.C. Manufacturing Co., Inc.Flat bottom plastic bag and method of manufacture
U.S. Classification383/106, 383/119
International ClassificationB65D33/02
Cooperative ClassificationB65D33/02
European ClassificationB65D33/02