Title:
Bag
United States Patent 2215989


Abstract:
The present invention relates to a new and use- 1 ful improvement in paper bags, generally open at one end and having a foldable flap extending t beyond said open end, and it relates more particularly to an.improved construction for such paper bags having juxtaposable selectively and mutually...



Inventors:
Wolf, Howard A.
Application Number:
US18073737A
Publication Date:
09/24/1940
Filing Date:
12/20/1937
Assignee:
Wolf, Brothers
Primary Class:
Other Classes:
229/80, 383/32, 383/35, 383/85, 383/86
International Classes:
B65D33/18; B65D33/20
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Description:

The present invention relates to a new and use- 1 ful improvement in paper bags, generally open at one end and having a foldable flap extending t beyond said open end, and it relates more particularly to an.improved construction for such paper bags having juxtaposable selectively and mutually adhesive gummed areas disposed on the bag body near said open end and on said,flap.

This application is a division of applicant's original application Serial No. 49,178, for "Bag," filed on November 11, 1935, and which matured into Patent No. 2,103,199 on December 21, 1937.

An object of the present invention is to provide such paper bag with a substantial and readily graspable tab-like portion projecting beyond the gummed flap area, said tab-like portion constituting means for opening the bag after the gummed areas have been brought into operative juxtaposition and the bag sealed.

Another object of the present invention is to provide a paper bag of the aforesaid type with such integral tab-like portion formed from and constituted by a marginal portion of the flap which projects beyond the gummed flap area. Another object of the present invention is to reinforce such tab by disposing the longitudinal overlapped body-joining seam somewhere along the back bag panel; said seam traversing the entire length of said flap, whereby the flap tab may be reinforced by a double thickness of paper.

Another object of the present invention is to construct a paper bag, having mutually and selectively adhesive gummed areas disposed about the open end thereof, from a continuous paper blank folded upon itself in tubular-like fashion and having its meeting edges adhesively secured in overlapping relation on the flap side of said bag, thereby forming a longitudinal seam along the back side thereof, whereby the pull tab afforded by that portion of the flap projecting beyond the gummed flap area may be strengthened by said overlapped longitudinal seam.

With the above and other objects in view which will appear more fully from the following detailed description and accompanying drawing, one embodiment of the present invention consists, of a paper bag formed from a continuous paper blank folded upon itself and having opposite marginal portions thereof adhesively secured in overlapping relationship, thereby forming a tubular bag body, said bag including a generally open end, a foldable flap extending beyond said end, juxtaposable, selectively and mutually adhesive gummed areas disposed on said 5 bag body near said open end and on said foldable lap, said areas being adapted to register when ;he flap is folded, and a pull-tab for separating he flap from the bag body after the gummed areas have brought into operative juxtaposition said tab being formed integrally with and constituted by the transverse marginal portion of the flap, the gummed flap area being spaced a substantial distance from the transverse edge of the flap.and said tab being reinforced by a double thickness of paper constituting a portion of a longitudinal body seam disposed on the flapbearing side of said bag.

The present invention further consists of other novel features and details of construction, all of which will appear more fully from the following detailed description and accompanying drawing.

For the purpose of illustrating the invention, there, is shown in the accompanying drawing forms thereof which are at present preferred, since the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and that the invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described.

In the accompanying drawing in which like reference characters indicate like parts, Figure 1 represents a front elevational view of an open bag-constituting one embodiment of the present invention.

Figure 2 represents a vertical sectional view taken on line 2-2 of Figure 1, looking in the di- 35 rection of the arrows.

Figure 3 represents a front elevational view of of the same bag illustrated in Figure 1, when closed.

Figure 4 represents a vertical sectional view taken on line 4-4 of Figure 3, looking in the direction of the arrows.

Figure 5 represents a front elevational view of an alternative embodiment of the present invention, wherein the flap fold line does not overlap any portion of the front bag panel, but instead projects slightly beyond the edge thereof.

Figure 6 represents a vertical sectional view taken on line 6-8 of Figure 5, looking in the direction of the arrows.

Figure 7 represents a front elevational view of the bag shown in Figure 5, when closed.

Figure 8 represents a vertical sectional view taken on line 8-8 of Figure 7, looking in the direction of the arrows view t Figure 9, represents a sectional view taken on line 9-9 of Figure 1, looking in the direction the arrows.

Figure 10 represents a sectional view taken c line 10-10 of Figure 1, looking in the directic of the arrows.

In the particular embodiment of the presei invention illustrated in Figures 1 to 4 inclusiv a paper bag or container indicated generally k the numeral II may include a body portio formed from a continuous paper blank folde upon itself at the fold lines 12 and 13, and havin the opposite marginal portions 14 and 15 therec adhesively secured in overlapped relation alon the seam 16, thus forming a generally flattene and open-ended tubular body portion havin front and rear panels or plies 17 and 18, respec tively.

The lowermost open, end of the tubular-llk body may be permanently closed by folding th downwardly projecting marginal portion 19 o the front panel I7 over this lower opening an( then adhesively securing this thus folded por. tion, in its end-closing position, to the rea: panel 18.

A foldable flap 20, which extends a substantia distance beyond the upper edge 21 of the froni panel 17, is preferably formed integrally witt and extended from the rear panel 18, and ma3 be separated therefrom by the fold line 22. This flap 20 may terminate in the arcuately formed transverse edge 23 illustrated in Figures 1 and 3, or it may terminate in a straight edge.

The fold line 22 separating the flap 20 from the rear panel 18 is preferably so disposed as to overlap to some extent the upper portion of the front panel 17, so that a transverse upper marginal portion 24 of panel 17 may pivot about this same fold line 22 together with flap 20 when said flap is folded to close the open mouth of the bag, thus effecting a more secure closure thereof.

Spaced juxtaposable gummed areas 25 and 26 may each be respectively provided on flap 20 and front panel 17 so that the flap 20 may be adhesively secured in its end-closing position to the bag body, thereby to effectively seal the open end of the bag.

The mutually and selectively adhesive gummed areas 25 and 26 preferably include an adhesive material impervious to water, and which is now, adherent to paper but adherent only to itself, and which will coalesce when pressed together.

This property of the adhesive material permits a multiplicity of bags I, Il to be stacked in piles and yet be readily separable from each 5 other when needed, as will be explained more fully hereinafter.

The adhesive matrial may include natural or synthetic rubber, and it is to be understood that the word "rubber" comprehends both forms thereof. A suitable adhesive for use on the gummed areas 25 and 26 may be made by dissolving para rubber in organic or other volatile rubber solvent, such as benzol or the like. A natural or artificial aqueous dispersion of raw rubber, such as latex, may also be used. jUpon the application of such a solution or dispersion to the paper surface, the liquid in the composition carries some of the rubber into the pores or fibers of the paper, so that a layer of gum or adhesive of the desired character may be left on the treated areas when the liquid evaporates.

The gummed areas 25 and 26 are each preferably spaced not only from each other but also from all free edges, so that "padding" may be 7a eliminated, of When the adhesive is applied to the paper in the liquid state and when the areas to whch the in adhesive is applied extend up to and include the in free edges of the flaps or bodies of the bags, some of the gum solution invariably spreads around a it the edges of the flaps and bodies, causing the e, bags to become fastened together, when these y bags are stacked in piles, like the sheets in a n pad of paper; the adhesive, which has spread d around the free edges, having adhered to the g gummed areas on the adjacent bags. The proif vision of ungummed areas about the periphery g of the gummed areas 25 and 26 eliminates such d "padding." g The flap 20 preferably extends a substantial - distance beyond the edge of the gummed flap area 25, as at 27, and this ungummed area 27 e provides a pull-tab by means of which the user Smay readily separate the flap 20 from the body f panel 17 (after the bag has been closed and the i gummed areas 25 and 26 brought into registra- tion with each other). Thus, the sealed bag may r be readily opened by grasping the projecting tablike portion 27 (which does not adhere to the I adjacent front panel 17 when the bag is closed, Sas illustrated in Figures 3 and 4) and by exerting a pull on this projecting portion 27 sufficient to separate the flap 20 from the panel 17.

The pull-tab 27 may be strengthened or reinforc'ed at the gripping portion 28 by a double thickness of paper without requiring any special construction or additional paper. Thus, the longitudinal tube-forming seam 16, comprising the overlapping marginal edge portions 14 and 15 of the body-forming blank, may be disposed along the rear panel 18, instead of the front panel 17 as heretofore, and may traverse and cross the flap 20. The end 28 of the seam 16 thus constitutes the strengthened or reinforced portion of the tab-like extension 27. Thus, that portion of the overlapped seam Which is included within the flap 20, and more particularly the end portion 28 thereof which extends beyond the gummed flap area 25, acts as a double thickness of paper which strengthens or reinforces the gripping portion of the tab-like extension 27, and insures proper opening of the sealed bag.

 The gummed area 25 crosses the flap end portion of the longitudinal seam 16, and the end portion of this overlapped seam, comprising the two layers of paper 14 and 15, is thus formed integrally with the tab-like extension 27, and provides t reinforced or strengthened gripping portion thereon. The substantial ungummed portion 27 of the flap 20 further provides a ready means whereby the bag I may be handled w.le inserting articles thereinto or withdrawing articles therefrom, without ontacting the adhesive areas with one's hands.

Another added advantage of the present invention resides in the fact that the gummed area 26 is spaced a considerable distance below the free edge 21 of the front panel 17. A considerable ungummed area, which may be used for handling the bag .I, is thereby provided in the vicinity of the mouth thereof. This further reduces the Possibility of contacting the gummed areas with one's hands. The bag illustrated in Figures 5 to 8, inclusive, is similar to that illustrated in Figures 1 to 4, inelusive, but differs therefrom in the alternative disposition of the fold line 22. Thus, thisfold line 22 is disposed In Figures 5 to 8 in non-overlapping relation with respect to the upper marginal portion of the front panel I7, thus eliminating the pivotable zone 24 shown in Figures 1 to 4.

The open end of the bag II therefore is sealed only by the flap 20, all as more particularly illusrated in Figures 7 and 8.

Moreover, in the embodiment illustrated in Figures 5 to 8 inclusive the gummed areas 25 and 26 are spaced somewhat closer together than they were in the hereinabove described embodiment, but it is to be understood that the flap 20 shown in Figures 5 to 8, inclusive, may be extended and the gummed areas 25 and 26 spacedfurther apart, as in the manner illustrated in Figures 1 to 4, inclusive. The gummed areas 25 and 26 should be spaced equi-distantly from the fold line 22.

Figures 9 and 10, although representing sectional views taken through the bag illustrated in Figure 1, represent equally well similar sectional views taken through the gummed areas 25 and 26 of the bag shown in Figure 5.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiments be considered in all respects as illustrative and not restrictive, reference being had to the appended claim rather than to the forgeoing description to indicate the scope of the invention. Having thus described the invention, what is l.-reby claimed as new and desired to be secured by Letters Patent, is: A bag formed from a blank of light-weight paper folded longitudinally to form a tubular body having juxtaposed front and rear panels, with opposite marginal portions of said blank meeting along said rear body panel and being generally permanently secured together in overlapped relation along substantilly the center line of said rear body panel, thereby forming a seam for said bag, said tubular body being generally permanently closed at its one end and open at its other end, said seam-bearing rear panel being longer than the juxtaposed front panel and extending for a substantial distance therebeyond at the open end of said body with its extending portion constituting a closure flap foldable down over said front panel to close said open end of the bag, the central portion of said flap Iq projecting outwardly a greater distance beyond the front panel than the side portions of said flap, and juxtaposable mutually and selectively adhesive gummed areas extending across the inside of said closure flap, including the seamed area thereof, and across the outside of said front panel respectively, the gummed area on said closure flap being of substantially elongated rec-i tangular shape and extending substantially from one side edge of the flap to the other and thereby crossing the lapped bag seam at a substantial distance inwardly from the free edge of said central portion of the flap, whereby the portion of said seam projecting beyond said flap gummed area constitutes a reinforced two-ply pullrtab adapted, when pulled, to initiate separation of said gummed areas thereby readily to open said bag. HOWARD A. WOLF.