US1827040A

US1827040A - Valve bag and method of closing the same

Info

Publication number: US1827040A
Application number: US260436A
Authority: US
Inventors: John C Redington
Original assignee: ST Regis Paper Co
Current assignee: ST Regis Paper Co
Priority date: 1928-03-09
Filing date: 1928-03-09
Publication date: 1931-10-13
Anticipated expiration: 1948-10-13
Also published as: NL24677C

Description

@QiL E, 1931. J. c. REDINGTUN m fi VALVE BAG AND METHOD OF CLOSING THE SAME Filed March 9, 1928 2 Sheets-Sheet l Zlwuenfoz John Red/nyton Och/13, 1931 J. c. REDINGTON VALVE BAG AND METHOD OF CLOSING THE SAME 2 Sheets-Sheet 2 Filed March 9, 1928 g'wuanto John C. Redinyton 6M0: "up

Patented Oct. 13, 1931 UNITED STATES PATENT OFFICE JOHN (J. REDING'ION, OF GENEVA, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ST. REGIB PAPER COMPANY, 01' NEW YORK, N. Y., A CORPORATION OF NEW YORK VALVE BAG AND METHOD OF CLOSING THE SAME Application med March 9, 1928. Serial No. 280,436.

This invention relates to valve bags and a method of closing the same. More particularly, it relates to bags having valves therein adapted to receive a large filling tube through which a charge may be filled into the bag rapidly, there'being a sleeve within the valve which is utilized to additionally strengthen the valved corner of the bag and the outer end of which is closed for more securely sealing the bag after filling.

Valve bags and the filling of bags through a valve opening is well known, but as ordinarily practiced is limited to a comparatively narrow range of materials because of the necessity of filling the material through a comparatively small opening. For commercial success it is necessary that the filling shall be performed rapidly, and the speed of movement required through the small openlng in order to fill the bags rapidly cannot be acquired with many materials without inJurmg the material.

Valve bags possess the great advantage of being completely manufactured before they are filled, so that no closing operation is necessary after the filling is completed. This invention has as its main object the provislon of a bag and a method of closing the same which will enable the use of a large filling tube, and thereby permit the rapid filling of bags without'subjecting the material to damage, and which can be completely closed after filling with only a minor closing operation, thereby extending the major portion of the advantages of valve bags to a much wlder range of materials.

In filling valve bags it is customary to sustain the valved corner of the bag upon a filling tube during the fillingoperation, and this corner of the bag is thereby subjected to a considerable strain. One advantage of the present invention is that it enables the reinforcement of the valved corner of the bag.

Other objects and further details of the invention will appear as the description proceeds.

In the accompanying drawings forming a part of this specification, Figure 1 is a view of the collapsed end of a tube from which a bag is formed; Fig. 2 is a view of the tube shown in Fig. 1, viewed from the right side of Fig. 1; Fig. 3 is a view similar to Fig. 1, but showing the valve flap tucked into position and a sheet inserted in the corner of the matic view showing the operation of filling and closing a bag having a valve such as shown in Figs. 5 and 6;- Fig. 8 is a plan view of the valved corner of a bag after filling and before being closed by stapling; Figs. 9 and 10 are a side view and plan view, respectively, of the valve sleeve closed by stapling; Fig. 11 is a section on the line 1111 of Fig. 10; Fig. 12 is a view similar to Fig. 9, but showing the end of the valve sleeve closed by sewing; Fig. 13 is a view of the parts shown in Fig. 12 viewed from the right of Fig. 12: Fig. 14 is a view of a corner of a bag, with parts broken away, showing a modified form of sleeve in position within the valve; Fig. 15 is a view of the valved corner of a filled bag with the valve sleeve closed by a wire tie.

The invention will be described as applied to a bag made from a paper tube. It will be readily understood that in practice the tubes will be formed of a plurality of plies of paper, as a usual thing, but for purposes of illustration only one thickness of bag wall is shown. I

In making valve bags from paper tubes, it is customary to fold a bag tube 20 with gussets 21 in its sides. and with one corner extendedas shown at 22, in order to form a longer valve when the corner is tucked into the position in which it is shown in Fig. 3.

After the valve has been tucked into the position in which it is shown in Fig. 3, a sheet of material 23 may be folded and-placed within the tucked-in valve flap. Preferably, the end of this sheet extends beyond the side of the bag; as shown at 24.

After this sheet has been placed in position, a reinforcing tape 25 is placed in position over the end of the bag and is sewed to the bag by means of a seam 26. It will be noted that seam 26 isstrengthened in the valved corner of the bag at 27 not only by the tucked-in valve flap 22, but also by the sleeve-sheet 23. It is preferable to unite the sides of sheet 23 so as to form a complete sleeve by means of the seam 26. This seam is extended to the end 24 of the sleeve.

It will be readily understood that a bag with a valve such as described may be placed in filling position upon a filling tube 28 of a filling machine of well-known type, such as shown somewhat diagrammatically in Fig. 7. the filling tube being of a large size allowed by the comparatively large valve. After the bag is filled by discharging material through filling tube 28 into the interior of the bag, the bag-carrying cradle may be rocked by means of handle 29, which turns the bag about a pivot 30 and discharges the bag onto a support 31, which is shown in Fig. 7 as being a conveyor suitable for conveying the closed bag with its valved corner beneath a closing apparatus 32.

It is preferable to fold the corners 33 of end 24: of the valve sleeve into the position shown in Fig. 8, and then turn the remaining portion 34 of end 24: to the position in which it is shown in Figs. 9 and 10. Thereafter the end of the sleeve is fastened in folded position by means of staples 35. This securely closes the end of the valve so that any material which sifts into the valve sleeve cannot escape from the bag.

While it is preferable to fold the valvesleeve and staple it in a manner similar to that illustrated in Figs. 9 to 11, inclusive, the closing machine shown in Fig. 'l' is a diagrammatic view of a sewing head having a needle 36 adapted to sew a seam 37 across the end 24 of the valve sleeve, as shown in Figs. 12 and 13. lit the valve sleeve is closed by sewing, it is preferable to provide reinforcing strips 38 in order to prevent tearing the paper.

While I have shown the valve sleeve as being placed in position in the form of a sheet and having the edges of the sheet united by the same seam that closes the end of the bag. it will be readily recognized that the sleeve may be formed into a tube before being placed in position in the bag, and sometimes this meth- 0d of operation is preferable. in Figs. 14: and 15 there is shown a valve sleeve 39 closed by a seam 40 before it is placed in position in the bag. While it is desirable to have this sleeve large enough to be sewed into the bagclosing seam at 27, the same as in the form of sleeve shown in Figs. 1 to 13. inclusive, it is sometimes desirable to have the outer end of the sleeve of somewhat smaller diameter, the closing seam of the sleeve dipping downward as at 41 until it is beneath the bag-closing 1,837,0dtll seam 26. This leaves the end of the valvesleeve free to be collapsed in every direction by a tie, such as the wire tie 42 illustrated in Fig. 15.

The form of sleeve shown in Figs. 14 and 15 is found quite effective when made of cloth. When the sleeve is made of paper, even if the sleeve is closed by a wire or other tie, it is preferred to extend the bag-closing seam to the end of the sleeve as shown in Figs. 5 to 13, so that the end of the sleeve is strengthened by the reinforced seam.

What I claim is:

1. A paper ba having one corner tucked in, a sleeve in t e tucked-in corner, and a seam closing the end of the bag, except for said tucked-in corner, and holding the sleeve in position in the valve, the sleeve extending into the seam between the walls of the bag.

2. A paper bag having one corner tucked in, a sheet of flexible material folded into said tucked-in corner and having its edges substantially even with the end of the bag, and a seam closing the end of the bag, except for said tucked-in corner, and uniting the sides of said sheet to form a sleeve.

3. A bag having one corner tucked in, a sleeve in the tucked-in corner, and a seam closing the end of the bag, except for said tucked-in corner, and holding the sleeve in position in the valve, the sleeve extending beyond the side of the bag.

4.. A bag having one corner tucked in, a sheet of flexible material folded into said tucked-in corner and having its edges substantially parallel with the end of the bag, and a seam closing the end of the bag, except for said tucked-in corner, and uniting the sides of said sheet to form a sleeve, the sleeve extending beyond the side of the bag.

5. The method which consists in folding in one corner of a tube, placing a sleeve-forming member within the tucked-in corner, and sewing a seam across the end of the bag and through a portion of the sleeve member, and thereby closing the end of the tube, except for the tucked-in corner, and holding the sleeve-member within said corner.

6. The method which consists in folding in one corner of a tube, placing a sheet of flexible material within the folded-in corner and with its edges substantially parallel with the end of the tube, and sewing a seam across the end of the tube and through the edges of the sheet, thereby closing the end of the tube, except for the tucked-in corner, forming the sheet into a sleeve, and holding the sleeve in place within the corner.

7. The methodwhich consists in folding in one corner of an open-mouthed bag, placing a sleeve-forming member within the tuckedin corner and with its end projecting beyond the side of the bag, sewing a seam across the mouth of the bag and along the side of the sleeve-forming member, filling the bag one corner of an open-mouthed bag, placing a sleeve-forming member within the tuckedin corner and with its end projecting beyond the edge of the bag, sewing a seam across the end of the bag and through a portion of said member, placing the sleeve over a substantially horizontal filling tube, filling the bag through the tube, giving the filled bag a quarter turn away from the tube and thereby placing the bag on its side with the sleeve extending upward and thereafter closing the the end of the sleeve.

10. The method which consists in folding in one corner of an open-mouthed bag, plac- 14. A. package comprising a filled bag having a fillmg sleeve at one corner, a closure extending across the end of the bag and along one side of the sleeve, and a sleeve-closure crossing the first said closure.

15. A package comprising a filled bag having a filling sleeve at one corner, a sewed seam extending across the end of the bag and along one side of the sleeve, and a row of staples across the end of the sleeve.

In testimony whereof I have hereunto signed my name to this specification.

JOHN G. REDINGTON.

ing a sleeve-forming member within the tucked-in corner and with its end projecting beyond the edge of the bag, sewing a seam across the end of the bag and through a portion of said member, placing the sleeve over a substantially horizontal filling tube, filling the bag through the tube, giving the filled bag a quarter turn away from the tube and thereby placing the bag on its side with the sleeve extending upward, and passing the bag sideways beneath a closing device and closing the end of the sleeve.

11. The method which consists in forming a valve with a filling opening in one side adj acent one end and with a sleeve pro'ecting from said opening beyond the side of t e bag, placing the sleeve around a substantially horizontal filling tube, filling the bag through the tube, giving the bag a quarter turn away from the tube and thereby placing the ba with said sleeve extending upward, an thereafter closing the end of the tube.

12. The method which consists in forming a bag having a filling opening and a sleeve projecting from said opening, filling the bag through said 0 ening, and thereafter folding and stapling t e outer end of the sleeve.

. 13. The method which consists in forming a valve with a filling opening in one side adjacent one end and with a sleeve projecting from said opening beyond the side of the bag, placing the sleeve around a substantially horizontal filling tube, filling the bag through the tube, giving the bag a quarter turn away from the tube and thereby placing the bag with said v sleeve extending upward, and thereafter folding and stapling the end of the tube.