US 2215989 A
Description (OCR text may contain errors)
Sept.' 24, 1940.- H. A. wo| F original Filedov'. 11, 1955 ENTOR 'NY m( f z 2 M A m. n 1 L Z w M Il :!|---m.--- o m Ill I lllIuvlllITl 4L50 cured in overlapping relationship,
Patented Sept. 24, 1940 Y Howard A. Wolf, Wolf Brothers,
Philadelphia, Pa., assignor to a partnership composed of Louis Wolf, Elias Wolf, Howard Wolf, Walter Wolf, Philadelphia, Pa.
Original application November 11, 1935, Serial No.
49,178.' Divided and ticularly to animproved 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,ap.
This application. is va division of applicants lo original application Serial No. 49,178, for Bag, filed on November 1l, 1935, and which matured intoPatent No. 2,103,1
An object of the present invention is to pro-A vide 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 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 ap, whereby the flap-tabmay 30 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 35 blank folded upon itself in tubular-like fashion and having its meeting edges adhesively secured in overlapping relation onthe ap side of said bag, thereby forming a longitudinal seam along the back side thereof,'whereby the pull tabjaf- 40 forded by that portion of the ap projecting beyond the gummed iiap area may be strengthened by said overlapped longitudinal seam. A
With the above and other objects in view which will appear more fully from the following des tailed rdescription 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 pposite marginal portions thereof adhesiveiy sethereby forming a tubular bag body, said bag including a generally open end, a foldable flap extending beyond said end, juxtaposable, selectively and muf tually adhesive gummed areas disposed on said 55 bag body near said open end and on said foldable 99 on December 21, 1937.`
bag of the aforesaidtype with.
this application December" Serial No. 180,737
flap. said areas being adapted to register when the flap is' folded, and a pull-tab for separating the nap from the bag body` after the gummed areas h'ave brought into operative juxtaposition said tab being formed integrally with and constituted by thetransverse marginal portion of the ap, the gummed flap area being spaced a substantial distance from the transverse edge'of the flap. and said tab being reinforced by a double thicknessof paper constituting a portion of a longitudinal body seamdisposed on the flapbearing side of said bag. I l n 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 satisfactoryvand 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 arrange` ment and organization of the instrumentalities as herein shown and described. f
In the accompanying drawing in which like reference characters indicate like parts, Figure 1 represents a front elevational view of an open bagconstituting one embodiment of the present invention.
Figure 2 represents a vertical sectional View taken on line 2 -2 of' Figure l, looking in the dil 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 ap 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 t-C of Figure 5, looking in the direction of the arrows.
Figure 'l represents a front elevational view of the bag shown in Figure 5, when closed.
Figure 8 represents a vertical sectional view taken oniine Hof Figure 7, looking in the direction of the arrows. 4,
Figure 9.represents -a' sectional view taken on line 9 9 of Figure 1, looking in the direction of the arrows.
Figure 10 represents a sectional view taken on line Ill-I of Figure. 1, looking in the direction of the arrows.
In the particular embodiment of the present invention illustrated in Figures 1 to 4 inclusive, a paper bag or container indicated generally by the numeral II may include a body portion formed from a continuous paper blank folded upon'itself at the fold lines I2 and I3, and having the opposite marginal portions I4 and I5 thereof adhesively secured in overlapped relation along the seam I6, thus forminga generally flattened and open-ended tubular body portion having front and rear panels or plies I1 and I8, respectively.
or it may terminate in a straight front panel I1,
,areas 25 and 26 preferably include an adhesive The lowermost openend of the tubular-like body may be permanently closed by folding the downwardly projecting` marginal portion I9 of the front panel I1 over this lower opening and then adhesively securing this thus folded portion, in its end-closing position, to the rear panel I8.
A foldable iiap 20, which extends a substantial distance beyond the upper edge 2| of the front panel I1, is preferably formed integrally with and extended from the rear panel I8, and may be separated therefrom by the fold line 22. This flap 20 may terminate in the arcu'ately formed transverse edge 23'i1lustrated in Figures 1 and 3,
The fold line 22 separating the iiap 20 from the rear panel I8 is preferably so disposed as to overlap to some extent the upper portion of the so that a transverse upper marginal portion 24 of panel l1 may pivot about this same `fold line 22 together -with iiap 20 when said iiap 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 2Bv and front panel I iso that the iiap 20 may be f adhesively secured in its end-closing position to tlie bag body, thereby to effectively seal the open end of the bag.
The mutually and selectively adhesive gummed material impervious to water, and which is nona adherent to paper but adherent only to itself, and whichv will coalesce when pressed together. This property of the adhesive material permits a multiplicity of bags II, II to be stacked in piles and yet be readily separable from each other when needed, as will bev explained more fully hereinafter.
The adhesive material may include natural or synthetic rubber, and it is to be understood that the word rubber vcomprehends 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 othervolatile as benzol or the like. A
rubber solvent, such natural or artificial aqueous dispersion of raw rubber,` such as latex, may also be used. Upon 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 o r bers of the paper, so that a layer o'f 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 eliminated. L
Whenthe adhesive is applied to the paper in the liquid state and when the areas to whch the adhesive is applied extend up to and include the free edges of the flaps or bodies of the bags, some of the gum solution invariably spreads around the edges of the ilaps and bodies, causing the bags to become fastened together, when these bags are stacked in piles, like the sheets in a. pad o1' paper; the adhesive, which has spread around the free edges, having adhered to the gummed areas on the adjacent bags. 'I'he provision of ungummed areas about the periphery of the gummed areas 25 and 26 eliminates such padding The flap 20- preferably distance beyond the edge of the gummed iiap area 25, as at 21, and this ungummed area 21 provides a pull-tab by means of which the user may readily separate the flap 26 from the body panel I1 (after the bag has been closed and the gummed `areas 25 and 26 brought into registration with each other). Thus, the sealed bag may be readily opened by grasping the projecting tabextends a substantial like portion 21 (which does not adhere to the adjacent front panel I1 when the bag is closed, as illustrated in Figures 3 `and 4) and by exerting a pull on this projecting portion 21 sufficient to separate the iiap 20 from the panel I1.
The pull-tab 21 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 I6, comprising the overlapping marginal edge portions I4 and I5 of the body-forming blank, may be disposed along the rear panel I8, instead of the front panel I1 as heretofore, and may traverse and cross the ilap 20. I'he end 28 of the seam I6 thus constitutes the'vstrengthlened or reinforced portion of the tab-like extension 21.
Thus, that portion of the overlapped seam v,which is included within theflap 20, 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 21, and insures proper opening of the sealed bag. The gummed area 25 crosses the flap end portion of the longitudinal seam I 6, and the end portion of this overlapped seam, comprising the two layers'of paper I4 and I5, is thus formed integrally with the tab-like extension 21, and provides a reinforced or strengthened gripping portion thereon.
The substantial ungummed portion 21 of the flap 20 further provides a ready means whereby the bag I I may be handled wlgile inserting articles thereinto or withdrawing articles therefrom, without contacting the adhesive areas with ones hands. i
Another added advantage of the present invention resides inthe fact that the gummed area 26 is spaced a. vconsiderable distance below the free edge 2I of the front panelf I1. A considerable ungummed area, which may be used for handling the bag II, is thereby provided in the vicinity of the mouth thereof. This further reduces the possibility of contacting the gummed areas with 'Ihe bag illustrated in Figures 5 to 8, inclusive, is similar to that\illustrated in Figures 1A to 4, inelusive, but differstherefrom in the alternative disposition of the `fold line 22. Thus, this' fold line 22 is disposed in Figures 5 to 8 in non-overlapping relation with respect to the upper marginal portion of the front panel I1, thus eliminating the pivotable zone 24 shown in Figures 1 to 4. The open end of the bag Il therefore is sealed only by the ilap 20, allas more particularly illusrated in Figures 'I and 8.
4Moreover, 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 25 spaced' further apart,
as in the manner illustrated in Figures 1 vto 4, inclusive. The'guxnmed 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 l, represent equally well similar sectional views taken through the gummed areas 25 and 26 of the bagvshown in Figure 5.
The present invention may be embodied in other specific forms without departing fromy the spirit or essential attributes thereof, and it is therefore desired that the present embodiments be consideredA 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 lnrebyclaimed as new and desired to be secured Y. by LettersPatent, is:
A bag formed from-a blank of light-weightpaper folded longitudinally to form va tubular body yhaving juxtaposed front and rear panels, with opposite marginal portions of said blank meeting along saidrear body panel andvbeing generally permanently secured together in overv lapped relation along substantilly the center line of said rear body panel, thereby forming a seam permanently closed at its one end and open at its other end, said being longer than the juxtaposedfront panel and extending for a substantial distance therebeyond at the open endof said body with its extending Vportion constituting a closure flap foldable down over said front panel toclose said open end of the bag, the central portion of said ilap projecting outwardly a portions of said flap, and juxtaposable mutually and selectively adhesive gummed areas extending across the inside of said closure ap, including the seamed area thereof, and across front panel respectively, the gummed area on said closure ap being of substantially elongated rec- ,l tangular shape and extending substantially from one side edge of the ap 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 ilap Agummed area constitutes a reinforced two-ply pullftab adapted, when pulledl to initiate separation of said gummed areas thereby readily,to open said bag. v
" HOWARD A. WOLF.
" for said bag, said tubular body,being generallyl seam-bearing rear panel l0` greater distance beyond the front panel than the side v20": the outside of saidl