For a more complete understanding of the present invention, including its features and advantages, reference is now made to the detailed description of the invention taken in conjunction with the accompanying drawing in which:
While making and using of various embodiments of the present invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts that may be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely illustrative of specific ways to make and use the invention and do not delimit the scope of the invention.
A flexible intermediate bulk container (FIBC), bulk bag, or big bag, is an industrial container made of flexible fabric that is designed for storing and transporting dry, flowable products, such as sand, fertilizer, and granules of plastic.
FIBCs are most often made of thick woven polyethylene or polypropylene, either coated or uncoated, and normally measure around 110 cm or 45-48 inches in diameter and varies in height from 100 cm up to 200 cm or 35 to 80 inches. Its capacity is normally around 1000 kg or 2000 lbs., but the larger units can store even more. A bulk bag designed to transport one metric ton of material, will itself only weigh 5-7 lbs.
Transporting and loading is done on either pallets or by lifting it from the loops. Bags are made with either one, two or four lifting loops. The single loop bag is suitable for one man operation as there is no need for a second man to put the loops on the loader hook. Emptying is made easy by a special opening in the bottom such as a discharge spout, of which there are several options, or by simply cutting it open.
There are a great and varied range of uses for FIBC's. Many applications are in industrial uses such as for the storage of powder based and bulk product:
1) Food Industry—Sugar, Salt, Flour, Dextrose, Starch, Food Additives;
2) Chemical Industry;
3) Construction Industry;
4) Agricultural Industry—Seed, Grain, Popcorn, Seeds, Nuts, Potatoes;
5) Crushed Stone, Sand, Gravel, Cement Industry, Clay;
6) Pharmaceutical Industry;
7) Plastics Industry—Absorbent Polymer, Resin, Pellets, Etc.;
8) Mining Industry;
9) Steel—Rebar Industry and Specialty Minerals; and
10) Hazardous Materials Industry.
Three types of the FIBC packaging include the Circular MC; a U-Panel FIBC; and the Baffled FIBC and will be explained in the next few paragraphs.
The Circular FIBC—The circular design is ideal as a linerless option for fine materials. Circular construction eliminates side seams resulting in improved sift and moisture protection. The spread loop design allows for easy fork lift access.
The U-Panel FIBC—The u-panel construction is excellent for a variety of products and has tremendous lifting capacity due to long loops sewn in the seams. A very popular design for dense products.
The Baffled FIBC—with corner baffles to maintain their rectangular or square shape once they are filled and during transportation, and in storage. The corner baffles are made to allow the material flow smoothly into all the corners, yet preventing the hag from expanding in the process.
However, these three types, as well as other types, of packaging each have its weaknesses. Therefore, a need exists that helps resolve the shortcomings of each packaging product that is currently offered with an efficient design that is stackable, durable, reliable and also allows printing on the wails of the packaging product.
One embodiment of the present invention (“heretofore referred to as “Flexstand”) is a semi-rigid FIBC made of 100% recyclable polypropylene components. A tri-wall U-panel design incorporates corrugated polypropylene (PP) sheeting in Four (4) sidewalls located between double wall fabric layers. This sidewall sheeting allows the Flexstand bag to maintain an unsupported rectangular shape when set in position for use. A set of internal web strap baffle belts attached at a right angle to the internal fabric wall provide support to each Ninety (90) degree panel maintaining the geometric shape when products are dispensed into the package. However, external baffles lines are not visible on the outside layer of the Flexstand bag allowing for an unobstructed printing surface. In addition, a set of top and bottom openings allow filling and discharge of the Flexstand bag. These openings can have multiple design characteristics incorporated into the semi rigid Flexstand package body. Moreover, lifting loops, or sleeves, allow for simultaneous pickup points at all four corners. Further, safe working loads for the Flexstand bag range from 1000 to 4000 lbs with a 5 to 1 safety factor.
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In this embodiment, two coroplast sheets 1302 are sewn into opposite side panels and remain part of the bag structure. The two side panels with coroplast give the bag structure and allow the form to stay open and erect. The other opposite side panels have no coroplast sheets.
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An embodiment of the present invention is a semi-rigid FIBC which can be made of recyclable polypropylene components (one alternative is the have invention made up of 100% recyclable polypropylene components). This embodiment includes a tri-wall U-panel design which can incorporate corrugated polypropylene sheeting in the four (4) sidewalls located between the double wall fabric layers. The sidewall sheeting allows the bag to maintain an unsupported erect rectangular shape when setup for usage. Internal web strap baffle belts attached at a right angle to the internal fabric wall provide support to each ninety (90) degree panel maintaining the geometric shape when products are dispensed into the package. External baffles lines are not visible on the outside layer allowing for an unobstructed printing surface. Top and bottom filling and discharge openings can have multiple design characteristics incorporated into the semi rigid package body. Lifting loops or sleeves allow for simultaneous pickup points at all four corners. Safe working loads range from 1000 to 4000 lbs. with a 5 to 1 safety factor.
Although this invention has been described with reference to an illustrative embodiment, this description is not intended to limit the scope of the invention. Various modifications and combinations of the illustrative embodiments as well as other embodiments of the invention will be apparent to persons skilled in the art upon reference to the description. It is therefore intended that the appended claims accomplish any such modifications or embodiments.
Number | Date | Country | |
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62431320 | Dec 2016 | US |