US2047095A - Coal bag - Google Patents

Description

C. Y. BOOTH July 7, 1936.

GOAL BAG Filed July 5, 1934 Clare/we o Patented July 7, 1 936 COAL an Clarence Y. Booth, Wilmington, Del.

Application July 5, 1934, Serial No. 733,885

1 Claim. (Cl. 150-1.'l)

My invention relates to improvements in bags or containers of the character used for conveying coal, and one object of the invention is to provide a bag of this character that shall be better able to withstand the extremely'heavy wear and the adverse conditions to which such bags are subjected in normal use.

Another object of the invention is to provide a bag of the stated character which shall be so fabricated that if any part thereof becomes ex-.

cessively worn, it may bereadily and quickly replaced by a new section, leaving the original form and construction of the bag unchanged.

A further general object of the invention is to simplifythe construction of containers of this general character and to reduce the cost of manufacture and maintenance.

In the attached drawing:

Figure 1 is a view in perspective of a bag made in accordance with my invention, and

Figs. 2 and 3 are views in perspective illustrating successive steps in the production of the bag.

With reference to the drawing, and specifically to Fig. 2 thereof, I preferably form my bag of a blank comprising three strips designated l, 2 and 3. In accordance with my invention, these strips are assembled as illustrated with the narrower intermediate strip 3 overlapping the adjacent edges of the strips I and 2, and initially the strips are held together by a suitable adhesive, preferably of the character of rubber cement, which is non-crystallizing and which permits separation of the strips if required without damage to the material of which the strips are made.

Preferably the strips l, 2 and 3 are composed of a heavy textile fabric such as canvas.

A subsequent step in the manufacture of the container is illustrated in Fig. 3, and consists in placing a handle strap 4, which may be of any suitable material but which preferably also is composed of a suitable heavy textile fabric such as canvas, over the lapped portions of the strips I, 2 and 3 as illustrated. Preferably this strap also is initially fixed in position upon the blank by means of a rubber or other non-crystallizing cement or adhesive. The abutting ends of the strap 4 may if desired be covered by a superimposed short section 5 of the same or other material The strap 4 is now secured by stitches as illustrated to the base blank, these stitches passing completely through the lapped portions of the strips l, 2 and 3, and functioning also to bind these strips together.

The blank thus produced and comprising the handle strap 4 is now folded into substantially U-form and the outer edges of the strips I and 2 stitched together to form the side scams 6 of the bag, the overlapped edge portions being first sealed if desired by the cementing operation previously described. The projecting portion of the 5 bag at the bottoms of the side seams 6 is then folded up in triangular form as shown at I, Fig. 1, and secured in place by stitching.

In completing the bag, the upper edge thereof is folded over as shown at 8, Fig. l, and stitched 10 to produce in efiect a reinforced upper edge; and it is preferred also topass rivets 9 through the handle strap 4 at the base of the loops and through this turned-over upper edge 8 as illustrated. At any desired point in the manufacture 15 of the bag as described above but preferably after the bag is complete, the entire surface area is impregnated with a rubber compound, as for example by immersing the bag or blank in a solution of rubber of suitable consistency. 29

A bag constructed as described above has certain characteristics which render it highly adaptable for use as a container for transporting coal and similar materials and constitutes a marked improvement over the prior bags commonly em- 25 ployed for the same or like purposes. Bags of this general character are used in large quantities by distributors of coal and are subjected to heavy wear and to the extreme abrasive action of the coal and coal dust. They are also subjected 30 to the combined effects of water and dust which tend to saturate and permeate the fabric, and which when the bags are stored for periods of time cause the fabric to mildew and rot. I have found that impregnation of fabric with a rubber 35 compound as described not only renders the fabric substantially waterproof and immune to the effects of water, but also resists the abrasive action of the coal and coal dust and prevents the latter from working its way into the body of the 40 fabric and the resultant rapid deterioration of the latter. A bag constructed as described above also has pronounced resistance to frictional wear caused by dragging the bags over cement or other rough surfaces, so that the bag is ex- 45 tremely rugged and durable. Furthermore, in the event of excessive wear in any part of the bag, the construction simplifies repair, so that the remaining useful portions of the bag may be utilized and the excessively worn parts replaced by fresh fabric. If for example the one end section embracing either of the strips l and 2 must be replaced, it is only necessary to release that portion of the handle strap 4 at that side of the bag by cutting the stitches, after which the worn end 55 section may be removed and replaced by a new section of corresponding form. For this, as previously set forth, the use of a rubber cement or other non-crystallizing adhesive medium is essential, for while the seams of the bag are cemented together and thereby effectively sealed, the parts may be readily separated from each other when repairs are required.

I claim:

A coal bag consisting solely of three strips of material and a handle, said strips forming respectively the opposite end and intermediate portions of the bag and each having at their opposite ends a reinforcing welt, said intermediate 5 strip lapping the adjacent edges of the end strips, Y

the handle element consisting of a narrow band of wear-resisting material and comprising portions overlying the lapped portions of said strips and secured to the latter by means of stitches extending through the overlapped portions of the strips and said stitches also passing through the overlying portions of the handle band whereby the stitches secure the handle to the bag and the overlapping portions of the strips to each other, said end and intermediate portions of the bag being readily separable one from another by removal of said stitches, the removed section carrying with it the reinforcing welt on said sectiom CLARENCE Y. BOOTH.

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