Патент USA US2412026код для вставки
Dec. 3, 1946. ' - c, A, ADAMS 2,412,026 MACHINE FOR FILLING VALVE BAGS Fil‘ed Nov. 18, 1945' ' - ‘ 16 INVENTOR. CLARKAUST/NADAMS ' BY ‘ ‘ A TITORNE Y 2,412,026 Patented Dec. 3, 1946 ‘UNITED STATES PATENT OFFICE.’ MACHINE FOR FILLING VALVE BAGS Clark Austin Adams, Limona, Fla, assignor to, Tennessee Corporation, New York, N. Y., a 001'? poration of New York ' Application November 18, 1943, Serial No. 510,737 1 Claim. (01. 226-48) 1 The invention relates to machines for ?lling bags provided with valves, commonly referred to as valve bags, and more particularly to ?lling machines of the automatic type for ?lling said bags to a predetermined weight with granular and non-granular solid materials as exempli?ed, 2 . ’ t, and labor is ‘furthermore involved in the re moval of the spilled material from the machine and ?oor. ~ The object of the invention is to provide novel ?lling means whereby the aforesaid di?iculties and objections are overcome. for instance, by granular phosphate known in the trade as granulated triple superphosphate, The invention contemplates primarily the pro the air in the bag and any air brought in with Fig. 2 is a side View thereof showing the novel vision of anovel ?lling tube designed to allow for the free and progressive escape of air from and ungranulated superphosphate, respectively. the bag as it gradually ?lls with material, and 10 In practice, with existing ?lling machines of to avoid trapping air in any detrimental amount the indicated type, the ?lling tube of the machine in said bag during a ?lling operation. extends through the valve of a bag being ?lled, Other objects will appear from the description the relative dimensions generally being such hereinafter and the features of novelty will be that a small opening is left between the said ?lling tube and the bottom of said valve. Dur 15 pointed out in the claim. In the accompanying drawing, ing the initial stage of a ?lling operation this Fig, 1 is a plan view of the novel ?lling tube; opening is su?icient to allow for the escape of ?lling tube in ?lling association with the valve the material. As the ?lling operation proceeds, however, and the bag begins to ?ll, it expands 20 bag; and Fig. 3 is a cross-section on the line 3—3 of in width and decreases in length, thus closing the Fig. 1. i a aforesaid opening. In addition, the solid granu 4 The ?lling machine per se may be any con~ lar material flows out of the ?lling tube down ventional construction and type, for instance, as one side of the bag being ?lled, and thereby blocks off the aforesaid opening from the major 25 shown in United States patent to Peterson, No. 1,818,091 of August 11, 1931, and in any case in portion of the air contained in said bag. From cludes at least one ?lling tube l5 suitably this it is clear that the only escape for the air mounted in place in communication with a con in the bag during a ?lling operation with exist - ventional supply hopper or equivalent source of ing apparatus is through the material coming in material to be packaged. Suitable means is pro by way of the ?lling tube, and out through the vided in the machine for controlling the dis loading and conveying equipment of the ?lling charge of material through the ?lling tube I5 machine. Under such conditions the pressure of in any conventional manner, and in addition said air developed and accumulated in the bag as it machine in many automatic forms includes becomes progressively ?lled with solid material, weighing means whereby the ?lling of the bags ?nally forces the air out through the ?lling tube, to a predetermined weight is controlled. impeding further progress of material into the The novel ?lling tube I5 may ‘itself be of any bag and slowing down the ?lling operation, and customary construction, and generally speaking in some cases even stopping it altogether, until is of curved cross-section with an opening IS in the operator can force an opening for the release of the trapped air. In addition to interfering 40 its bottom for the discharge of the material into the bags. The tube'l5 is carried by a bracket ll with or stopping the ?lling operation, the rush whereby said tube is mounted in the ?lling ma-, of the released air through the ?lling tube blows chine in the conventional manner. As shown in the material being packaged out through the aforesaid loading and conveying equipment onto the machine and the ?oor on which it stands. When the bag is ?nally ?lled, there still remains air trapped in said bag capable of developing a pressure generally sufllcient to ?ll the ?lling tube and valve of the bag with the solid material. When the ?lled bag is removed from the machine this air rushes out through the valve of the bag, causing further spillage. This spillage of ma the drawing two ?lling tubes l5 may be carried by a common bracket I‘! for alternate or simul taneous use during an operative period of the machine in which said tubes l5 are embodied. In the novel construction means are associated with the ?lling tubes 15 for permitting air to escape progressively from the bags during ?lling thereof. The bags which are ?lled by ?lling apparatus of the type under discussion generally are pro terial not only causes waste but in addition re vided with valves for sealing the bag after ?lling sults in inaccurate bag weights which are re quired to be adjusted. Considerable loss of time 55 and customarily are referred to as valve bags. A 2,412,020 3 bag of this type is disclosed in United States Pat ent to Crawford No. 2,270,842 of January 27, 1942, and is diagrammatically illustrated in Fig. 2 of the instant drawing. 4 tral bar I8 and two associate bars I! are secured to the top of the tube I5 in spaced parallel rela tion lengthwise thereof to form two parallel vent- 2 ing channels 22. In operation, a bag 20 is placed over the ?lling UK When a bag such as the valve bag 20 is in po-_ ‘ tube l5, and conventionally clamped in place with sition on the ?lling tube [5, the venting channel the ?lling tube [5 extending into the interior of or channels #22 establish free communication be said bag 20, through'the valve 2| thereof. When tween'the atmosphere andltheinte'rior of the bag the bag 20 is in place on said ?lling'tube IS, the being ?lled, and thereby “permit the air in said air-escape means as exempli?ed by the bars l8 10 bag to escape progressively therefrom during the ?lling operation. and I9, establishes free communication between the atmosphere and the interior of said bag 20 The novel ?lling means shown and described or, more speci?cally, the free air space thereof. herein and in any other arrangement coming within the inventive idea, overcome and avoid all material in granular form is discharged through of the disadvantages heretofore present in exist the discharge opening I6 01’ the ?lling tube l5 ing apparatus and in addition increase the ca into the bag 20. As the ?lling operation vproceeds pacity of the associated ?lling machine to a ma the bag 20 progressively increases in width and terial extent. decreases in length by the eifect of the gradually Although the present invention has been de rising amount of material which is being dis scribed in conjunction with preferred embodi charged by the ?lling tube I 5. During this oper ments, it is to be understood that modi?cations ative stage, the air in the bag 20 above the rising and variations may be resorted to without depart material therein is conducted through venting ing‘ from the spirit and scope of the invention as channels to the atmosphere, or in other words is those skilled in the art will readily understand. permitted to escape progressively from the interi 25 Such variations and modi?cations are considered or of the bag 20 during the ?lling operation. As to be within the purview and scope of the claim. 'I claim: » ' a result the air pressure in the bag 20 is main tained constant at atmospheric pressure and no Apparatus for ?lling valve bags comprising a air is trapped to develop air pressure‘whereby ?lling tube adapted to extend horizontally inward material is spilled and wasted as in existing ma through a valve of a bag for conveying material chines. -When the desired amount of material into the same, a pair of outer members consist has been ?lled into the bag 20, the discharge ing of independent bars mounted and ?xed upon thereof through the ?lling tube I5 is cut o? and the upper surface of said ?lling tube and extend the ?lled bag 20 is removed from the machine and ing lengthwise thereof in spaced parallel relation transported away from said machine, for in- - to each other, and an intermediate member stance, on a suitable conveyor. As the ?lled bag formed by an independent bar mounted and ?xed 20- is removed from the machine, the valve 2|‘ upon said upper surface and extending between closes automatically to seal the bag 20 and pre and beyond said outer bars at one end in spaced vent spillage of its contents. I parallel relation with said outer bars to provide In the form illustrated, a plurality of members spaced parallel open venting channels between With the ?lling machine in ‘ operation solid or bars l8 and I!) are secured in any suitable man ner to the ?lling tube l5 in spaced relation pref erablyalong the top thereof to form at least one air-venting channel 22. In the speci?c arrange ‘ ment shown, three members consisting of a cen adjacent bars for establishing free communica tion between the atmosphere and the interior of the bag to thereby permit air to progressively escape therefrom during the ?lling operation. v CLARK AUSTIN ADAMS. '