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Dec. 3, 1946. '
Fil‘ed Nov. 18, 1945'
‘ 16
Patented Dec. 3, 1946
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)
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,
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.
bag as it gradually ?lls with material, and
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.
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
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
The bags which are ?lled by ?lling apparatus
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
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.
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.
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.
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