US1546360A - Process of producing filled bags - Google Patents

Description

A. BATES PROCESS OF PRODUCING FILLED BAGS July 21, 1925. 1,546,360

orizinal Filed Oct. 6, 1919 I Patented July 21, 1925. V

UNITED STATES .PATENT- QFFICE.

ADELMER M. BATES, OF CHICAGO, ILLINOIS, ASSIGNOR TO BATES VALVE BAG COM- To all whom it may concern:

useful Improvement .ducing Eilled Bags,

IPAINY, OF CHICAGO,

ILLINOIS, A CORPORATION OF WEST VIRGINIA.

PROCESS PRODUCING FILLED BAGS.

Application filed October 6,

' Be it known that I, ADELMER M. BATES, a citizen of the United States, residing at Chicago, in" the county --of Cook and State of Illinois, have invented a certain new and in Processes of Proof which the follow-. ing is a specification.

My invention relates to a process of making and filling bags and particularly to a process wherein the material to be filled into the bag is to. be weighed and particularly where the weighing consists in first supplying the bulk of materialneoessary to fill the bag and then in supplying a small fiow or,

supply to accurately complete the necessary and adapted filling. The process is illustrated in the accompanying drawing in connection with a diagrammatic showing of an apparatus suflicient to carry out the process.

A is a roll of bag "ng material which is I preferably formed into a tube by being folded around a former B, its two edges being sewed together by the sewin ma-' chine G, to form the tube. The tu so formed on the outside of such 0 linder B, is then carried up over the edge 0 the cylinder and down until it emerges as the tube D. Inside of the bag tube is another guard or sup 1y or primary tube E which may form t e lower projection on the funnel E This funnel and tube E are normally filled with the material to be fed into the bag, as indicated at E Preferably dl'SPOSed'Wfi/h' in the tube E is the rotary secondary filling tube or shaft E- properly moimted and supported, as, for example, in bearings E,

to be rotated by. means of the pulley E and the belt E thereon. On the. lower end of this feed tube E are the propeller flights E" whereby, when this feed tube is rotated, the material is forced downwardly, and, when the tube is. stopped, the material is supported against further descent. F is a feed device which may take the form of a rotary screen in the bottom of the funnel F On its shaft F is a pulley F adapted to be driv e'n by the belt F. This screen or feed device is interposed between the funnel F which is supplied with the material F and the open top of the tube tube, whereupon approximately the 1919, Seriatlh. 828,775. Renewed May 6, 1925.

are mounted on and carried by. the supporting frame G". These fingers are normally in the elevated position shown in dotted lines, and they are adapted, when they descend, to pass between the slats Gr of the scale.

I have-not shown the details of the mechanism or of the connections of the several parts, as the mechanism forms no part of this invention and is only here illustrated for the purpose of enablin me to explain the process, which process, liowever, can be carried out in part by hand or by a variety of apparatuses very difierent from those illustrated. I

S indicates the two needles and T the severing device, device being properly'associated and supported so that they move laterally across thebagtubeto form the closure for the top of the bag and the bottom of the tube and.- to sever the filled portion from the tube.

The use and operation of my may be illustrated in connection with the parts of the apparatus here shown is asfolows:

Assuming that the fabric, mounted on a suitable roll, has been brought into proper relation with the apparatus, it will be printed or marked as may be desired, and, then formed-into a' bag tube by means of the sewing machine which unites its edges. The printed matter will be so placed that it willbe on the inside of the tube when firstformed outside the forming tube, and the seam, of course, will be on the outside of the tube. As'the process proceeds and the tubeis reversed, the longitudinal seam is brought inside and the printed matter outside. he operation continues until a short section of the bag tube extends below the forming the lower end of the tube is closed in any desired'manner. The packing flights are now rotated, preferably together with the secondary filling tube, whereupon they feed the material downwardly into the closed end, of the tube and pack'it against such closed-end forcing the material and the bag tube downwardly until entire amount of material' desired in the bag has thus been fed and packed into the lower end of the tube. If the bag is to receive L00 pounds, we may assume that, at this point, 98 pounds of inaterial have been fed lower end of the tube.

process as it and packed intothe have forced the lower end ofthe tube downwardly to a distance about equal to the length of the bag to be formed, and here the lower end of the bag comes in contact with the fingers of the support or trip. It might I come in contact with these fingers at any v a loose or puckered portion of the bag tube at a point between the top of the bag to be formed and the end of the forming tube. The bag'js now resting on the scale which shows, for example, that 98 pounds have been inserted. At this point by auto matic machinery or the action of the operator the feed screen or sieve F is set in operation so that a small feed of material takes place from the funnel E down through the feeding tube into the top of the bag, and, when the scale indicates that the 100 pounds or the total desired amount has been received, the supply mechanism is stopped either by hand or automaticall The portion of'the tube above the filed bag portion is now brought-into proper relation to a preferably laterally traveling sewing machine and two seams are run across it, followed by a severing device, so that the filled bag is closed and severed from the tube and the lower end of the bag tube, is closed to form the bottom of the next bag, and the operation then proceeds as before until the roll of fabric or the entire tube is used up. I prefer to make the tube from the fabric as the process of filling the bags is carried 'on, but it is quite-within my process to manufacture the bag tube in great length and to thread it up on the supply tube and then to fill as above stated.

"As will be seen from the above,-by this process I am enabled to fill thebulk of the material into the bag under pressure and to pack it against the bag walls while they are under tension. This produces a well filled compact package. At the same time, by 'relieving the tension on the tube walls during the secondary operation, I am enabled to weigh the bag accurately, and the secondary feed, by which the necessary additional material is slowly sifted into the bag, does not materially affect the weighing, so that packages of uniform weight can be obtained. Where the term sifting is employed in the claims, it relates to dropping the material portion. I have used this term to indicatethat part of the tube, which after it has been cut,

orms the bag. It is, of course, not a separate bag until it has been cut away from the tube, and, until it has been cut, away it is merely a bag portion of the tube. k

It is obvious that various changes within the scope of the appended claims-may be made in the process While retaining some of the advantages.

j I claim:

1. The method of producing filled bags which comprises suspending a bag from above, filling the bulk of a charge of material into the bag while it is sosuspended, then discontinuing the suspension and supporting the bag from beneath, and, while the bag is supported from beneath, weighing it and sifting into it the necessary additional amount to complete the charge. a 2. The method of producing filled bags which comprises forcing the material into a bag and packing it against the closed end of the bag, while resisting motion of the closed end by tension of the bag walls, discontinuing the force feed and tension when the greater part of a charge has been packed contents and loosely filling into the bag the nlecessary additional amount to complete the c arge.

3. The method of producing filled bags which comprises forcing material in an annular stream against the closed end of a bag while resisting movement of saidclosed end by tensibn of the bag walls, discontinuing the annular stream and the tension on the walls when the greater part of a charge has been packed into the bag, then weighing the into the bag, and then weighing the bag and bag, and contents and completing the charge forcing an annular stream of material,

through the tube against the closed end and thus forcing the end downward against the tension of the adjacent walls, discontinuing the annular stream and the tension when the greater part of a charge has been packed into the tube against, its closed end and the adjacent taut walls, then weighing the filled portion and sifting into it centrally the ad- .ditional material necessary to complete a charge, and then closing and severlng the tube to form a separate package.

5. The method of filling and closing bags which comprises forcing material, in an annular stream only, into the bag in a direc tion axial ofthe bag until the greater part ofacharge is inserted, and then weighin the bag while adding, centrally of the bag only, additional material necessary to complete the charge, and then clo'sinigl the bag.

6. The method of producing 'lled bags .which comprises progressively packing ma- 5 terial into a bag, pressing each successive increment against material previously in the bag, furnishing resistance to the movement of the material in the bag, in response to the pressure of the added increments, by tension of the walls of the bag, until the bulk of a desired charge is inserted in the bag, then relieving the tension on the bag walls, resting the partially filled bag on a weighing device; and completing the fillin of the-bag by dropping material into it whll'e it is resting on the weighing device.

7. The method of producing filled bags which comprises progressively packing material into a bag, pressing each suc cessive increment against material previously in the bag, furnishing resistance to the movement of the material in the bag, in response to the pressure of the added incre: ments, until the bulk of a desired charge is inserted in the bag, then discontinuing sai resistance and restmg the partially filled bag on a weighing device, and completing the filling of the bag by dropping material into it while it is resting on the weighing device. In testimony whereof, I affix my slgnature in the presence of two witnesses this 17th day of September 1919.

v ADELMER M. BATES. Witnesses MILDRED H. -MAokE, EDITH L. PORTER.

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