US2980313A

US2980313A - Bag

Info

Publication number: US2980313A
Application number: US685502A
Authority: US
Inventors: James L Quinn
Original assignee: Bemis Brothers Bag Co
Current assignee: Bemis Brothers Bag Co
Priority date: 1957-09-23
Filing date: 1957-09-23
Publication date: 1961-04-18
Anticipated expiration: 1978-04-18

Description

J. L- QUINN April 18, 1961 BAG Filed Sept. 25, 1957 V, A V v V v James L. Quinn, Norfolk, Va., assignor to Bemis Bro.

Bag Company, St. Louis, M0,, acorporation of Mrssouri Filed Sept. 23, 1957, Ser. No. 685,502

1 Claim. (Cl. 229-63) This invention relates to bags, and more particularly to a bag made of nonwoven porous fabric for containing a desiccant, having a fold constituting one side edge of the bag, a stitched side seam at the other side edge, and a tie string by means of which the filled bag may be suspended in a confined space for absorbing moisture from the space, the tie string extending across the bag on the outside thereof adjacent the top and being stitched to the bag.

Among the several objects of the invention may be noted the provision of a bag of the class described with means for economically reinforcing the top corner of the bag at the upper end of the fold which constitutes the one side edge of the bag to prevent the top stitches from pulling out at said corner; and the provision of a method of economically manufacturing bags with such reinforcement. Other objects and features will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the constructions and methods hereinafter described, the scope of the invention being indicated in the following claim.

In the accompanying drawings, in which one of various possible embodiments of the invention is illustrated,

Fig. l is a plan view of a web from which bags of this invention are made;

Fig. -2 is a perspective view illustrating the folding of an individual bag blank segmented from the web as shown in Fig. 1;

Fig. 3 is a perspective view illustrating the Fig. 2 folded blank after the formation of the side seam;

Fig. 4 is a perspective view illustrating a completed bag with a tie string at the top, the bottom of the bag being open for filling;

Fig. 5 is an enlarged cross section taken on line 5-5 of Fig. 4; and

Fig. 6 is a view showing the bag as it appears when filled and closed at the bottom.

Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to Fig. l of the drawings, there is indicated at 1 a continuous web of nonwoven relatively porous fabric from which desiccant bags of this invention are to be made. In accordance with this invention, the web 1 is continuously fed from a supply thereof (a supply roll, not shown, but which would be off to the left of Fig. 1) and a textile cord 3 is combined with it extending longitudinally along the center line of the web. The cord 3 may be a conventional cotton cord. It is adhered to the web 1 at intervals by means of any suitable adhesive as indicated at 5. The web 1 having the cord 3 adhered thereon is segmented into individual bag blanks such as indicated at B in Fig. l by cutting on lines such as indicated at C-C spaced apart a distance corresponding to the required bag height. The width of the web is somewhat greater than twice the required final bag width.

As shown in Fig. 2, each bag blank B is folded in half on a fold line 7 coincident with the cord 3 to bring together the marginal edges of the blank. The cord 3 is on 1 the inside of the folded blank. As shown inFig. 3, the

margins of the folded blank opposite the fold 7 are folded over as indicated at 9 on one face 11 of the folded blank and stitched as indicated at 13 to provide a stitched side seam. This stitched

side seam

9, 13 extends the full height of the folded blank and completes the formation of the bag tube T illustrated in Fig. 3, one side of which is constituted by the fold 7 and the other'side which is constituted by the stitched side seam. The cord 3 is entirely on the inside of the tube extending along the fold line 7. The cord is secured to the tube at intervals by the adhesive 5.

A top portion 15 of the bag tube T is folded over upon the tube T on a transverse fold line 17 which constitutes the top edge of the completed bag as shown in Fig. 4. This top portion 15 is preferably folded over on the face 11 of the tube. The top portion 15 includes a portion of the

side seam

9, 13 and a portion of the cord 3. A tie string 19 is provided extending laterally across the bag tube preferably on the other face 21 of the bag tube and adjacent the top edge of the bag tube along a line spaced from the top edge 17 a distance less than the height of the folded-over top portion 15. This tie string is considerably longer than the width of the bag and extends out beyond both sides of the bag. The tie string is secured to the bag and the top of the bag is closed by top stiching 23 which extends through the tie string, through the folded-over top portion 15 and through the walls of the bag. It will be understood that in quantity production, a continuous length of tie string material may be applied to a succession of bags, the bags being fed through a sewing machine at spaced intervals, the string material subsequently being cut between successive bags. As a result of this procedure, the stitching extends from end-to-end of each tie string 19, as appears in Figs. 4 and 6. Y

The bottom of the bag is left open for filling as indicated at 24 in Fig. 4. After the bag has been filled with desiccant through the bottom, the bottom is closed by folding over a bottom portion 25 of the bag and stitching it as indicated at 27 in Fig. 6.

The tie string 19 is adapted to be used for suspending the filled bag by knotting its ends together to form a loop. The cord 3 and the

side seam

9, 13 reinforce the top corners of the bag, these corners being regions where, if there were no reinforcement, tearing would be apt to occur when the bag is suspended. While the tie string is shown as being on the side 21 of the bag opposite the side 11 on which the top portion 15 is folded over, it could be applied on the folded-over top portion 15.

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

As various changes could be made in the above constructions and methods 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.

I claim:

A desiccant bag formed of a rectangular blank of nonwoven fabric folded in half on a heightwise fold, said fold constituting one side edge of the bag, said bag having a stitched side seam securing together the margins of the blank opposite the fold, a cord extending heightwise of the folded blank from one end thereof to the other entirely on the inside of the fold and adhered at least at intervals to the blank, a top portion of the folded and sideseamed blank being folded over against one face of the bag on a transverse fold constituting the top edge of the bag, said folded-over top portion including a portion of said stitched side seam and a portion of said cord, a tie ,string extending-laterally aeross the bag on the outsider thereof adjacent the top edge of the bag along a line spaced from the top edge a distance less'than the height qtt e ol dva: op p tion. a d ie str ng ex end ng quth qnd-both ie ofthe a lands id efhav ns 9p 6 References ited the file of this patent UNITED'STATES PATENTS I Kroeber Aug. 10, 1880 Hill Oct. 26, 1886 Bergstein Mar. 10, 1936 Overly V 1 Nov. 29, 1938' Waters Nov. 5, 1940 Fortuin May 20, 1941 w pgma a- --.:.A J 2. 19 3