US2259274A - Bag - Google Patents

Description

Oct. 14, 1941. w. D. sToHLMAN 2,259,274

BAG

Filed Jan. 2, 1941 2 Sheets-Sheet 2 mp5 ONLY OBE 5f Patented Oct. 14, 1941 ywiuimli n. siohimmsi. Louis, Mo.. signor to Bemis Bro. BagCompany, St. Louis, Mo., a oorporation of Missouri Application January. 2, 1941, serial No. 372,119

1o claims. (CI. 13o-389) This invention relates to bags. and with regard to certain more speciiic features, to bags for conv taining comminuted materials, the bags being' woven per se lor made from woven materials.

Among the several objects of the invention may I be noted theprovision of a bag from whichv 4sampllngs may be taken by'piercing the same "with a sampling probe or stube but in which the resulting pierced opening can easily be reclosed to prevent escape from the bag of more than `the desired amount of material;- the provision of a ,bag of the class described in which the above end isattained without the use of a special material for the main bag area and which use s special material only in a-li'mited area, said area, for the object of maximum strength, being woven continuously withthe warp andl filling orweft threads of said mainbag area; the provision of means of the class described which is readily applicable to both sewn and seamlessbags and the operation of. which is readily understandable by asampler; and the provision of means of this class which is arranged to prevent detectable adulteration of `material at any elevation -in the b ag. Other objects will be inpart 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 i will. be exemplifled in the structures hereinafter described, and the scope of the application of which will be'indicated in the following claims.

, In the accompanying drawings, in which are illustrated several of various possible embodiments of the invention: Fig. 1 isaside viewoi aseamles's the invention applied'thereto;v

Fig. 2 is an enlarged detail view of the portion of Fig. 1 and showing a stripe;

Fig. 3 is a fragmentary and further enlarged view of the weave of said-stripe, showing in solid lines the resulting` opening due to inserting a sampling probe, and in dotted lines how the open'ing may readily be reclosed;

Fig. 4 is a view similar to Fig. 3, but showing material outside of the testing stripe and show- .sponding parts throughout the several views or the drawings.

.Inspectors of seeds or other products carried i in bags generally insert a hollow, tubular and vpointed sampling probe through the lled bags for the purpose `of extracting through the probe the seeds or the like which are inspected. One of these probes is shown at P in Fig..8 and has la seed inlet opening at S and an outlet at O. The probes are generally of substantial size and make a substantial opening in the cloth of the bag,

and generally so strain this cloth or tear it that the seeds or the like which are carried therein continue to leak out of the opening thus left.

This resultsin substantial waste. For example,`

in a carload of seeds where all bags are tested,

it is possible that the losses may run as high as a hundred pounds or more to the car in an ordinary shipment. 'I'he presentinvention provides in a cloth bag means whereby the openings due to theprobe reclose themselves, without excessively increasing the cost of the bag, and

i without decreasing its strength.

bag showing Referring now more particularly to Fig. 1, there is shown in general at numeral l a. so-called seamless bag. This is a bag made from a continuou's woven tube such as shown in Fig. 5. This Vtubeis cut into suitable lengths, each of which is sewn at one end prior to filling, as indicated in Fig. 1 at numeral 3. 'Ihe bag is then lled through the other open end and thereafter closed.4 It is the intention herein that the warpthreads of the bag be placed as indicated at 5; and that the lling or weft threads `be located peripherally, as indicated at 1.

The main body of the material of the fabric tube 9 of Fig. 5 (which forms the bag I of Fig. 1) is woven with ordinary warp and filling or weftl yarns composed each of an individual strand. Preferably, thoughvnot necessarily, the warp yarn Y vis thinner than the'iill or` weft yarn. 'Ihe thicker ing the 7result of driving a probe therethrough;I 7

Fig. 5 is a fragmentary view of a tubular blank which is used in making the bagvof Fig. 1;

' Fig. 6 is a view similar to Fig. 14 showing the application of the invention to av sewn bag; Fig. 'I is a fragmentary view of a cloth strip from which the bag of Fig. Gis made; and, Fig. 8 is a plan view of asampling probe. Similar reference characters indicate correfilling or weft yarns are shown in black in Figs. 2, 3 and 4. This fabric is tight enough to prevent leakage of ordinary seeds.

The primary dilculty with body'fabric of this type is its tightness, the individual yarns being.

y woven over and under each other so that there is substantially no chance that any yarn can be pushed aside over an adjacent one when a probe is inserted.- 'Ihe result`is that the threads will be broken when a hole is formed, and this hole is not self-repairing. The weaving above referred to, and also the results of driving a probe therethrough, are shown diagrammatically inFig'. a.

It is to be understood that the interstitial space between the yarns in Fig. 4 has been exaggerated to illustrate the remarks herein, and that actually the yarns lie quite close to one another and, as above stated, are tightly enough woven to prevent, escape of ordinary seeds.

The invention consists in providing, during the weaving of the bag material, vprobe stripes Il which will ultimately become longitudinally placed in the bag. These stripes are formed out of the same yarn which makes the relatively tight warp and filling or weft of the main body of the bag, but the weave of the stripe is diiferent, as indicated in Figs. 2 and 3. This change in weave consists, for example, in bringing together pairs of .the heavy filling or weft threads (black) which, by said pairs, are interwoven with quadruple groups of the warp (white) threads. This weaving of the stripes Il by groups of threads (two or more) instead of by individual threads is known as a basket weave and is effected along the length oi the bag for the limited width of the stripe, as indicated in Fig. 1. Suitable indicia such as at I3, reading for example Probe Stripe Only, may be printed next to the stripe to indicate to the tester thatvlthe sampling probe should be sent through the weave of the stripe only, and not elsewhere in the body of the bag.

For making clearly visible the basket-weave I stripe area through which the probe is to be inseted, the warp threads of the stripe may be colored before Weaving, thus to distinguish clearly from the threads of the remainder of the bag. Or, all threads of the stripe may be colored after weaving. It will be understood that while the one side 2| and at the bottom 23 (Fig. 6).

diierent coloring of the probe stripe threads is desirable the invention may be used without this diiference in color, because the difference in the weave gives a fair indication of where the stripe is (see Fig. 2 for example).

As indicated in Fig. 3, when a probe is sent through a stripe which is basket woven from groups of individual yarns, the opening Q effected by inserting a probe is not associated with any tearing of the yarn. Apparently this is because the group weaving causes more resiliency, or a looser weave, or a larger thread displacement without tearing, which, when the probe is withdrawn, may be replaced as shown by the dotted lines,v thus closing the opening against further outflow of the contents of the bag. With singlewoven yarns the lack of resiliency, or the tightness of weave, causes tearing, as indicated in Fig. 4.

An advantage of the invention is that by using -the same warp and illling or weft threads for the probe stripe as are used in the remainder of the bag body the self-closing character of the probe stripe is obtained without weakening the bag by any discontinuity in the warp and lling or weft threads which constitute it. At the same time the high cost of weaving all of the bag like the stripe is avoided.

It will be seen from Fig. 1 that the probe stripes are vertical, two of them being used on the front of the bag and two on the back (see also Fig. 5). This vertical positioning of the stripes assures that probes can be inserted into the bag at any elevation. If horizontal stripes were used, a relatively large number would need to be used, each at a diierent elevation, to avoid the possibility of the ller of the bag placing unadulterated material in a bag to a level over a probe stripe and then lling the remainder with adultered material. This would avoid abstraction of adultered material but at greater cost of producing the bag. By having vertical stripes, a probe may be taken anywhere and a minimum length of stripe gives the maximum choice of elevation for probing.

The entire bag is not made of the material of which thefstripes are composed, because the multiple, basket-woven yarn of Fig. 3, as ontrasted to the single-yam weaving of Fig. 4, is costlier and results in a material which is not desired throughout the bag sides in general.

In Figs. 6 and '7 the invention is shown as applied to a sewn bag wherein a strip of material (Fig. 7) having longitudinal warp threads and lateral ll threads is out up along lines l5 and folded at l1, sewing being accomplished down 'Ihe material of Fig. 'I has pre-woven therein the stripes Il of the desired character. The nal bag may be used with or without turning the seams outside to inside.

From the above, it will be seen that the main body of the bag is made of closely and tightly woven fabric which receives a permanent opening when the probe is inserted, but that the stripe is made of-material which is also closely woven but as a basket weave. which is resilient and which constitutes an area through which a probe may be thrust to eiect an opening adapted to be reclosed whenthe probe is withdrawn. It will be seen that it is important that the weave of the stripe be substantially as close as, or closer than, that of the main body of the bag to prevent comminuted material from escaping under normal conditions. Thus a feature of the invention is the provision in the basket weave stripe of a more resilient weave permittingL hole reclosure without sacrificing normal impermeability. An additional feature is that the same size of warp and lling or weft threads make the stripe as make the main body of the bag.

By the term basket weave, as used herein, is meant that two or more warp threads are woven as one warp and two or more iill or weft threads are woven as one weft, throughout the areas occupied by the basket weave. 'I'he stripes are exemplary of equivalent limited testing areas. The term tight weave, as used herein, means that each warp and each ll or weft thread is woven singly.

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.

I claim: p

1. A bag comprising a body portion of relatively large area tightly plain woven to hold comminuted material, and a probe stripe of relatively small area constituted throughout by a basket weave, the weave of the stripe admitting of the insertion of a sampling probe with shifting but without breakage of threads and withdrawal of the sampling probe and subsequent closing of the resulting opening solely by shifting of the displaced threads back into normal position.

2. A bag for comminuted materials comprising fabric of relatively tight plain weave constituting the main and larger body area of the bag,

and at least one` smaller area constituted by ay sertion of a sampling probe without breakage of f threads'and withdrawal of the same and subsequent closing yo1' the resulting opening without the addition of more material at the opening.

3. A bag for comminuted materials comprising fabric of relatively tight plain weave constituting the main and larger body area of the bag, and at least one smaller area constituted bya basket Weave throughout, said basket weave being made up of multiples of four threads in the f warp direction and multiples of two threads in the weft direction. said weft threads being same as the weft threads in said tight weavejsaid basket weave admitting the insertion of a. sampling probe without breakage of threads and withdrawal of the same'and subsequent closing of the resulting opening without the addition of more material at the opening.

4. A bag for comminuted materials comprising fabric of relatively tight plain weave constituting the main body area of the bag, and at least one limited area of basket weave throughout constil tuting an area through which a sampling probe maybe thrust without breakage of threads to remove material from the bag, said basket weave of said area being adapted for reclosure about the resulting opening due to insertion of. a sampling probe, without addition of more material at the opening, both of said weaves being impermeable to said comminuted materials.

5. A bag for comminuted materials comprising plain woven fabric for the main body area oi' the bag consisting of single-woven warp and weft threads, and at least one limited area of woven fabric consisting throughout of multi-woven warp and weit threads constituting a limited area through which a sampling probe may be thrust,

`to displace threads to form an opening to remove material 'from the bag without breakage of threads, the opening being adapted to be reclosed when the sampling probe is withdrawn therefrom solely by shifting the displaced threads back linto normal position, certain strands of said body material and oi the material in the a tight plain weave throughout most of the body area of the bag, and atleast one local sampling, area in the lbag composed entirely of a basketA weave of equal-sized warp threads and the same' ll threads to admit a sampling probe to form an opening without breakage of threads about which reclosure of threads can subsequently be effected without addition of any materiaLat the opening. 7. A bag comprising a body portion tightly plain woven to hold comminuted material, and

-a vertical probe stripe constituted throughout by a basket weave, the basket Weave of the stripe holding comminuted material and admitting of the inserting of a sampling probe without thread breakage and withdrawal ofthe same and subsequent closing of the resulting opening without addition of material at the opening.

8. A bag comprising a body portion tightly plain woven'to hold comminuted-material, and a limited area being continuous although of said dierent' weaves.

6. A bag comprising a body portion comprising warp and illl threads individually woven to form plurality of vertical probe stripes each constituted by a basket weave, the weave of the stripes admitting of the inserting of a sampling probe Without thread breakage and withdrawal of the same and subsequent closing of the resulting opening without applying additional material at the opening, common threads being used for both weaves in a direction normal to the stripes.

9. A bag comprising Aa woven body portion composed of warp and iill threads which are the same throughout, said threads being woven singly in the main body area of the bag to form a relatively tight plain weave through which comminuted material in the bag cannot pass,

said threads being basket-woven throughout a" limited probe area, whereby said limited area exclusively will receive a sampling probe without thread breakage for extracting comminuted material from the bag, allowing the sampling probe'to be withdrawn, and adapted to. permit a reclosure of said opening without use-of additional material at the opening.

v10. A bag comprising a relatively tightly woven main body portion comprising individually plain woven, relatively light warp threads and relatively heavier nll threads, at least one sampling` probe stripe in the wall of the bag constituted throughout by a basket weave of similar warp y threads and the same ll threads said basket weave admitting the insertion of a sampling probe without breakage of threads and withdrawal of thesame and subsequent closing of the resulting opening without the addition o! material at the opening.

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