US2558169A - Valved bag - Google Patents

Description

June 26, 1951 c. v. BRADY El Al.

VALVED BAG 3 Sheets-Sheet 1 Filed Sept. 24, 1948 FIG.|.

C. V. BRADY ET AL VALVED BAG June 2%, 1951 3 Sheets-Sheet 2 Filed Sept. 24, 1948 June 26, E951 c. v. BRADY E1 AL 2,553,169

VALVED BAG Filed Sept. 24, 1948 3 Sheets-Sheet 3 Patented June 26, 1951 VALVED BAG Charles v. Brady and August F. .Otting'er; so Louis, Mo., assignors to Bemis Bro. Bag .Gompany, St. Louis, Mo., a corporation of Missouri Application September 24, 1948, S-rial'No. 30.89%

9 Glaims. (01.150 9 This invention relates to valved bags, and-more particularly to an improved valved bag having an insert type of valve sleeve.

Among the several objects of the invention may be noted the provision of a valved bag embodying reinforcement means at the bag mouth facilitating handling and packing; the provision of a valved bag of the class described having a label strip extending peripherally around the upper margin of the bag; the provision of a bag of this class embodying an adhesively secured valve sleeve insert; the provision of a bag of this class embodying a valve insert which is more firm- 1y held in place; and the provision of a valved bag such as described which is economical to manufacture. Other objects will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application or which will be indicated in the following claims.

In the accompanying drawings,- in which-sew eral of various possible embodiments of the invention are illustrated,

Fig. 1 is a plan view of a composite web from which the bag of this invention is made,

Fig. 2 is a plan view of a folded and stitched bag blank made from the web of Fig. 1;

Fig. 3 is a plan view of the Fig. 2 blank after an initial step performed in the manufacture of the ba Fig. 4 is a top view of the blank of Fig. 3 after another step;

Fig. 5 is a top view of the Fig. 4 blank after a further step;

Fig. 6 is a top View similar to Fig. 5 after an additional step;

Fig. '7 is a plan view of the finished bag made from the blank of Fig. 6;

Fig. 8 is an enlarged perspective view of the valve of the Fig. 7 bag;

Fig. 9 is an enlarged section of a portion of the bag taken in a plane similar to that of Fig. 7 but passing widthwise through the center of the Fig. 1-0 is a view similar to that of Fig. 9 showing another valve embodiment;

Fig. 11 is a View similar to that of Fig. 5 showing a further valve embodiment;

Fig. 12 is a top view after an intermediate step in the formation ofa valve in the Fig. 11- blank;

Fig. 13 is a view similar to that of :Fig. 9 showing the finished valve or the Fig 12 embodiment;-

2 Fig". 14-is' a View similar-t that (if-Fig. showing an additional valve. embodiment;

Fig. 15 is a top viw'after.an-intermediatestep in the formation-of "a -valve in the Fig. 14 blank;

and-,-

Fig. '16 is'a-view'similar to that of :Fig. 9-show= ing the finished valve ofthe Fig. '15 embodiment;

Figs. 9, 10,- 13' and 16 show in dotted lines fill= ing tubes inserted throughthevalvesof the in= vention.

Similar reference characters indicate .ccrrespending parts throughout theseveral views of the drawings. u

Referring to Fig. 1, the bag of this invention is shown to be made from ablank I cutfrom a composite web comprising bag material 3 and a reinforcement stripor ban s; The bag material 3 may be of any nature such as textileor paper"- lined textile; The relatively narrow strip 5 may be of paper 01 the 'like-arid is-seoiired by adhesive 1 to the margin of Web 3, preferably the full length thereof. The strip 5 may 'besecurd to thebag' web-by a Substantially continuous method of manufacture.- *Iliestrip 5i'nay'be pre pri'n'ted with suitably spaced advertising indicia for purposes to be described.

Referring to Fig. 2, the blank -I is folded-upon itself along a longitudinal central line of foldin A,- transverse to strip 5,s'o that the strip 5 is inside the bag. The adjaer'itmarginal edges-p pos'ite fold A and the adjacent marginal edges H opposite the strip-5 or-at the bottom of the blank are sealed as by stitching 13 leaving the mouth 21 open. The blank is then reversed to provide'ifitur'hd sidahd'bdttom seams'as shown in Fig. 3. If desired,- the bag length reversing step and the inturnd seams may be eliminated by folding the Blank -l' Witfr the reinforce'm'nt strip 5 on the exterior thereof and seaming as be'-= fore. To" facilitate-the formation of a tucked-iii valve'fiap 15, the folded and seemed blaiik-drbai length may be provided withfold lines Bangling across both front and rear bag Walls at the upper corners the ieo'f adjacent fora A to define a tr'iangular segment l5 bisected by the row A: The triangular segment [5 of the bag body is tucked inwardly within the-bag body to provide a tuckedin valve flap as shown in- Fig. 4.- The tucked-iii valve flap is traversed at its inner edge 11 by a ortion or the reififbrdlfint'stfiD-S. v

A valve sle'vei-iisert l9 comprising a genera iv rctafiguIar' mains er fieiible sheet rfl-at'fi'al prer: erably paper; issecuredtd the i-nrier edge [16f the' valve cap 5. The insert" l'9 isifiitially -di' rected outwardly ver the valve flap #5 arid is secured at its inner edge to the inner edge H of the valve fiap by a relatively narrow strip of adhesive 2|. The valve sleeve I9 is then folded inwardly along the line C adjacent the outer edge of its adhered portion 23 to provide :an inwardly directed valve extension 25 (Fig. 6). The valve flap l and valve sleeve l9 are then folded upon themselves along line D and the edges of the bag mouth 2'! brought together and closed as by stitching 29 (Fig. 7). The mouth seam stitching also anchors the upper edges of the valve extension. The above described order of steps is chosen to simplify the discussion, as the valve sleeve 19 may be secured to the bag length prior to the formation of the tucked-in valve flap I5. The finished bag has a reinforcement strip 5 which extends peripherally around the closed bag mouth and down within the tucked-in valve flap. The exterior portion of strip 5 may bear suitable advertising indicia (indicated by the letters X Y Z) and serve as a label area. The exterior portion of strip 5 also strengthens the bag mouth to facilitate applying a bag upon "a filler tube 3!) (Fig. 9), and supporting same on the tube. The portion of the reinforcement strip 5 which traverses the valve flap l5 has the advantage of permitting a paper to paper adhesive attachment of the valve insert 19 to the valve flap. If desired, the edges of the sheet- I 9 may be spaced from the bag mouth so as not to be anchored by the mouth stitching 29.

Another embodiment of this invention is illustrated in Fig. 10. The construction is identical with that of the previously described embodiment up to and including Fig. 5. The bag mouth 21 over onto the outwardly directed valve extension 25 to anchor together its upper edges though this need not be done. After the bag is filled, the valve is closed by folding or rolling up and tucking in extension 25. The result is what is called a tuck-in valve.

A further embodiment is shown in Figs. 11-13. A tucked-in valve flap I5 is formed as before and a valve sleeve insert 3| is secured to the inner edge ll' of the valve flap so that it is initially directed inwardly over the bag mouth 21 (Fig. 11). The unadhered portion 33 of the valve extension is in this case folded outward along a line E adjacent the outer edge of the adhered portion 35 to provide a valve extension which may later be tucked in for closure. The valve sleeve 31 is folded upon itself and the bag mouth closed and seamed as before (Fig. 13)

Figs. 14-16 illustrate an additional valve embodiment of the outwardly directed type adapted to be tucked in for closure. In this form, a relatively longer valve sleeve insert 31 is secured by the adhesive are 23 adjacent the inner edge I! of the valve flap l5. Thevalve sleeve 31 is then folded outwardly along a line F spaced inwardly from the inner edge ll of the valve flap to provide an outwardly extending valve extension 39. The bag mouth may be closed and stitched as before (Fig. 16). However, it will be noted there is provided a substantial four ply portion 4 i a of the valve sleeve which is anchored by the mouth stitching 29 as contrasted with the relatively small upper corners of the valve sleeve which are anchored by stitching 29 in the previously described embodiments of Figs. and 13. The valve is closed by folding or rolling up and tuck-- attaie 4 ing in the valve extension portion 39. This construction results in an even stronger valve less likely to be torn from the bag body.

It is preferable that the width W of the strip 5 be less than the inward extension or depth U of the valve flap, as indicated in Figs. 3, 7, 9, 10, 13 and 16 for example. This facilitates the ease with which the break is accomplished at K (see Figs. 3 and 6-10) when the valve flap is turned in. This is due to the fact that by this means the break is made to occur in a part of the bag wall which is not reinforced by the strip.

Thus it will be seen that the invention provides for a valve extension which has a stronger attachment to the tucked-in valve flap by reason of attachment of the extension to :a paper band forming an inner face of said valve flap. This is particularly true in the case of a bag which would otherwise present a fabric face inside of the flap, to which the extension might not adhere as well as it does to paper. The paper band also extends from the valve flap out into the bag walls around the top of the bag thus strengthening the attachment of the paper band to the valve flap portions. In addition, this strengthening extension is positioned outside of the bag so that it may, if desired, be used for advertising indicia.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

1. A valved bag having a tucked-in valve flap at one corner thereof, a discrete reinforcing strip extending around the bag at the valve flap end thereof traversing the margin of the valve flap and secured to the bag proper, one edge of the strip being substantially coincident with said end of the bag, and a valve sleeve having one margin secured to the portion of the strip traversing the margin of the valve flap.

A valved bag havin a tucked-in valve flap at one corner thereof, a discrete paper reinforcing and label strip extending completely around the bag at the valve flap end thereof traversing the margin of the valve flap and adhered to the outside of the bag proper, one edge of the strip being substantially coincident with said end of the bag and the width of the strip being less than the depth of the valve flap, and a paper valve sleeve having one margin adhered to the portion of the strip traversing the margin of the valve flap.

3. A valved bag comprising a rectangular blank of bag material having a discrete relatively narrow reinforcing strip extending along one margin thereof-with one edge of the strip substantially coincident with the edge of the blank at said margin, the blank being folded along a line transverse to the strip with its marginal edges adjacent one another and seamed to form the bag, :a corner of the bag on the fold line bein tucked in to provide a valve flap with a portion of the strip traversing the margin of the flap, and a valve sleeve having one margin secured to the portion of the strip traversing the margin of the flap.

4. A valved bag comprising a rectangular blank of bag material having a discrete relatively narrow paper reinforcing and label strip extending along one margin thereof, the strip being adhered to the blank with one of its edges substantially coincident with the edge of the blank at said margin, the blank being folded along a line transverse to the strip with its marginal edges adjacent one another and seamed to form the bag, the strip extending around the outside of the bag, a corner of the bag on the fold line being tucked in to provide a valve flap with a portion of the strip traversing the margin of the flap, the strip being narrower than the depth of the flap, and a valve sleeve having one margin adhered to the portion of the strip traversing the margin of the flap.

5. A valved bag as set forth in claim 4 wherein the sleeve extends into the bag from the margin of the valve flap.

6. A valved bag as set forth in claim 4 wherein the sleeve extends outof the bag from the valve flap.

7. A valved bag as set forth in claim 4 wherein the sleeve is folded back over the margin thereof adhered to the strip to extend into the bag.

8. A valved bag as set forth in claim 4 wherein CHARLES: V. BRADY. AUGUST F. OTTINGER.

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

UNITED STATES PATENTS Number 7 Name Date 2,103,092 Robinson Dec. 21, 1937 2,415,862 Belcher Feb. 18, 1947 FOREIGN PATENTS Number Country Date 733,896 France Oct. 12, 1932

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