US2402476A - Baling method - Google Patents

Description

A. N. WEEKS BALING METHOD June 18, 1946.

Original Filed Sept. 2, 1941 2 Sheets-Sheet 1 June 18, 1946. A. N. WEEKS 2,402,476

Original Filed Sept. 2, 1941 2 Sheets-Sheet 2 Patented June 18, 1946 2,402,476 BALING METHOD Arnold N. Weeks, North Scituate, Mass, assignor to Bemis Bro. Bag Company, St. Louis, Mo., a corporation of Missouri Original application September 2, 1941, Serial No.

Divided and this application January 14. 1943, Serial No. 472.335

1 Claim. (Cl. 226-2) This invention relates to balin and with'regard to certain more specific features, to a method of and apparatus for baling bags and the like for transportation, and relates to the resulting article.

This application is a division of my copending United States patent application, Serial No. 409,- 169, filed September 2. 1941, for Improvement in baling, eventuated as Patent No. 2,342,565, dated February 22, 1944. My Patent 2,374,147, dated April 17, 1945, is also a division of said Patent 2,342,565.

Among the several objects of the invention may be noted the provision of a compact, firm, wellcompressed and shaped container for bags for the like, which is neater and more easily handled than the package heretofore used and in'which chafing and deformation of the contents is avoided; and 'the'provision of a baling method which is fast and economical of time and material. Other objects will be in part obvious 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 of which will be indicated in the following claim.

In the accompanying drawings, in which are illustrated several of various possible embodiments of the invention,

Fig. 1 is a side view showing a baling tray associated with a receiving cover;

Fig. 2 is a plan view of Fig. 1;

Fig. 3 is a vertical section showing a filled container applied to baling apparatus;

Fig. 4 is a horizontal section taken approximately on line l4 of Fig. 3, showing a presser foot;

Fig. 5 is a fragmentary detail in side elevation of said presser foot;

Fig. 6 is a plan view of Fig. 3, with the presser foot removed and a closure operation completed;

Fig. 7 is a front elevation of a tray used according to an alternative method;

Fig. 8 is a side elevation of the tray of Fig. 7 indicated in a turned-down position; and,

Fig. 9 is a perspective View showing another modification.

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

Heretofore the methodof packaging paper bags for transportation was to apply wrapping paper around compressed groups of the bags and then totie these with baling rope.

According to the present method the bags are inserted into an outside covering bag, and then pressed together preparatory to closing the bag into position to act as a bale to contain the bags and hold the compression, thus to form a wellfilled, solid bag or bale.

Referring now more particularly to Figs. 1 and 2, numerals I formally indicate groups of the bags which are to be packaged. In each group is a number of flat bags, say for example twentyfive. The bag mouths are at 3 and the bottoms are at 5. Since the bottom end of such a group is thicker than the mouth end, due to the construction of the bags composing the group, the groups are arranged alternatively with their mouths directed inward, as shown in Fig. 2. This is in order to obtain a column or pile of the bags which is of equal length on both sides. In order properly to form the column, the bags are stacked on edge horizontally in a U-shaped tray I. This tray-has a bottom 9 andside walls I I for guide purposes.

The tray is partially inserted into the open mouth I3 of a larger bag I5 (Figs. 1 and 2) which is to form the bale cover. This ba I5 is closed at its bottom as shown at IT. After all of the bags which will be accommodated by the baling cover or bag I5 have been inserted into the tray, they are pushed endwise into I5, which. opens automatically under the air pressure engendered ahead of the bags as they enter.

It has been found to be unsatisfactory simply to insert the bags I into the holding bag I5 and then to close the latter, because of the tendency of the interior bags I to become uneven laterally and to separate into a loose condition endwise. And, it is desirable to'hav'e a compressed condition of the interior bags so that the exterior cov ering bag l5 acts as a bale or tensioning cover.

In order to accomplish the desired ends, the loaded bag I5 is placed upright (Fig. 3) next to a pair of clamps I8, which are hinged at I9 on a platform 2|. Prior to swinging the clamps I8 to the position shown in Fig. 3, a presser foot 23 is brought downinto position within the bag I5. This presser foot is detailed in Fig. 5 and consists of a stem 25 on which is a lower pad 21. Hinged to the pad 21 at 29 are flukes 3| which-are normally biased up into the flat-wise position shown in ,Fig. 3. This is done by means of springs 33. The flukes are limited in their upward movement by triangular stops 35. The possibilities of movement being against the bias of springs 33.

As the presser foot is brought down into the completely open mouth ll of bag II, the flukes are horizontal, as shown in Fig. 3. This is accomplished by relative movement between the table II and the stem 25. It is not of importance which moves, the table 2| Or the stem 25. The important thing is the relative movement which brings about compression of the bags within the baling cover Hi. The degree of compression is such that the uppermost group of bags is brought just under the final positions of fingers 31 on said clamps it, which are now swung into position so that portions 33 of the open mouth 4| of the bag are partially folded in over the ends of the contained bags. For this purpose the flukes are provided with clearing notches 43 (Fig. 4).

Next, the platform 2i and the stem 25 are separated, which causes a withdrawal of the presser foot from out of the mouth ll of bag l5. Any interference with the ends of the flukes 3i by the partially closed portions 39 of the mouth is provided for by the flukes rotating downwardly and stretching the springs 33 as indicated in Fig. 5. This is in response to dragging contact by the flukes with the partially closed portions 39 of the bag mouth. In other words, the presser foot is collapsible in response to contact with the partially closed bag mouth as the presser foot is withdrawn.

Next, the operator folds shut the open mouth as indicated in Fig. 6. At this time the fingers 31 have determined endwise fiat regions 43, over which are folded sidewise flat flaps 45, one of the flaps 45 being over the other. Then holding strips 41 are adhered over the end of the bale, and thereafter the clamps l8 are swung outward to free the finger 31 from holding position above the bale. Thereafter, the compressed bags which form the contents of the bale l5 spring apart, because of their relative elasticity upon release. Thus the contents of the bale are under tension and the result is a neat, tight package which would not be obtained simply by inserting bags into a baling bag and closing it.

In Figs. 7 and 8 the tray I is shown provided with cars 49 and a rotary shaft 5|, the latter passing through bearing blocks 53. The shaft Si is under control of a gearing 55, operable from a hand wheel 51, so that the tray 1 may be moved from a vertical position to a more or less horizontal position.

In Fig. '7 the tray 1 is shown vertical, and in dotted lines is shown how the bags are applied in the tray. In Fig. 8, the loaded tray is shown as having been turned down and the mouth l3 of a baling bag l5 brought into position over the end of the tray, preparatory to pushing the contents of the tray into the baling bag. From this point on, the operation are the same as those described in connection with Figs. 3 5.

If desired, instead of using a rigid tray for aligning the bags preparatory to placing them in the baling bag l5, a strip of paper 59 may be laid down and after placing a group of the bags upon one reach ii of said paper, it is brought around the end of the column of bags a indicated at 63, and then over them as indicated at 65. This forms a cradle. Then the assembly of Fig. 9 is manipulated so that the end 63 is inserted into {he mouth l3 of the baling bag IS, the paper 59 being left in the package. Thereafter, the bale is manipulated along the lines described in connection with Figs. 3-5,

One of the principal features and advantages of this invention is the use of a widely diiiused or dispersed retention of thecompressive iorce, originally imposed, by the bale-forming bag which performs the double function of a tension medium and a protective cover, to produce generalized restraint with the elimination of concentrated points of force as produced by ropes, steel bands, wires, or other localized restraining mediums which cause cutting, chafing, distortion, wrinkling and other defects and damages.

Another advantage arises from the holding of inner bags under generalized compression in the compact edgewise arrangement shown. This produces a solid and compact unit which naturally stacks and handles so that bags remain in edgewise position at all times. Such position a completely eliminates resilience and spring which is characteristic of ordinary bales and bundles of bags and eliminates damage from rubbing and chafing in shipping which is unavoidable in irregularly shaped resilient bundles of bag produced by other methods.

Another advantage of this invention consists of its economy of materials since only a minimum of overlap is used at all points and by utilizing the tensile strength of the covering bag the use of ropes, wires, straps, etc, is entirely eliminated.

Another advantage of the invention is the fact that the accordion-like expansion of the contents within the bale-forming bag l5 serves to tension the entire surface of the bale and to provide a neat appearance. In addition, loading is relatively easy, considering the results obtained. For example, no ordinary wrappings are needed or baling bands. The advantages of a bale are obtained by using an ordinary bag. This feature of the invention is a result of the method of illiing, compressing, and closing.

The invention saves wrapping material, because the preformed bag l5 requires only small overlapping portions at its seams; whereas the former wrapping sheets needed to be overlapped several inches to form an effective package.

In addition, the present method allows of stacking a greater number of bags in one stack without the danger of sidewise slippage. In this connection, it may be noted that the clamps it are positioned right next to the opposite ends of the stack, and serve alignment purposes during the compressive operation of the presser foot.

Thus the side clamps hold the sides of the container bag I5 and also hold the contained bags compressed.

It is of substantial importance that the presser foot perform its pressing operation near the ends of the contained bags, and not only at the center, so that the ends do not spring up. This means that the tucked-in portions 39 of the bag mouth .will necessarily interfere with withdrawal of the presser foot, unless it is collapsibly constructed,

as above described. Thus it will be seen that a 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.

I claim:

The method of baling fiat bags in a preformed sack-like bale, the bale having a closed end and an open month, each of said bags to be baled having a relatively thick end and a relatively thin opposite end; comprising stacking the bags fiatwise in an accordion-like column with the thick ends of adjacent groups of bags oppositely directed and the thin ends of said groups overlapping centrally, moving the stack thus formed endwise into the open mouth of said bale, centrally compressing the end of the bag column by substantially straight-line movement only, while 6 exposing edgewise portions of the bag column containing the thick portions of the bags, effecting compression through said open mouth of the sack-like bale, partially closing said bale mouth from the outside of the bale and over said exposed edgewise portions so as also to hold compression in portions of the column containing the thick portions of the bags, terminating the inside central compression only by a substantially straight-line movement out through the open mouth of the sack-like bale while holding edgewise compression from the outside of the bale, closing the mouth of the bale over the central portion of said column while holding the edgewise compression, permanently fastening the resulting closure, and thereafter releasing said edgewise compression.

ARNOLD N. WEEKS.

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