US1238389A - Flour-packing device. - Google Patents

Description

B. D.,J. N. & C. V. COOK.

FLOUR PACKING DEVICE.

APPLICATION FILED SEPT-2|. 191s.

Patented Aug. 28, 1917.

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BORDEN D. COOK, JOHN l\T. COOK, AND CHARLES V. COOK, OF SEATTLE, VTASHINGTON.

FLOUR-PACKING DEVICE.

Specification of Letters Patent.

Patented Ari 28, 191*.

Application filed September 21, 1916. Serial No. 121,445.

T all whom it may concern Be it known that we, BORDEN D. COOK JOHN N. Coon and CHARLES V. Coon, citizens of the United States, and residents of a Seattle, in the county of King and State of *ashington have invented certain new and useful Improvements in Flour-Packing Devices, of which the following is a full, true, and exact specification.

Our invention relates to tlour packing devices and more particularly to devices for filling flour sacks whether paper or cotton, and has for its principal object to provide an improved and novel device for packing and discharging the flour in a solid and continuous core; to provide a multiple stage packing screw; to provide means which form a layer of loose and tluti'y flour between the core and the sack. Heretofore, in packing flour mill products in bags and the like. it has been custoi'nary to either surround the bags with a rigid casing and then pack the bag full of flour, sew up the bags and remove them from the rigid casing or to simply pack the flour directly into the bags as tightly as possible without breaking the bag. Xeither or these processes get the flour into as small a volume as is desirable from a standpoint of economy of space required in shipping and in material necessary for sacks. Furthermore. the sacks are frequently filled too full or too hard, so that upon handling a large percentage of sacks break with the result of a loss of flour. Ap-

' plicants device is designed to compress the ilour into a hard and compact core which is somewhat smaller in diameter than the sack and to thrust the core into the sack and at the same time providing means for expanding an outer layer to form a cushion between the core and sack with loose and tlutty flour and to thereby prevent breakage of sacks and to effect a large saving in material for sacks and economy in space for shipping and handling. Applicant-s device may be either attached or built into any one of a number of flour packing devices now on the market or may be built in the form of a new machine. The device as herein illustrated has been in actual use for a period of several months in a large flour mill and has proven successful in every way with the advantages as set forth above.

Other objects will appear as our invention is more fully explained in the following specifications, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings Figure l is a plan view of our device. Fig. 2 is a central cross section of same.

Referring more particularly to the drawings which illustrate only the packing cylinder and do not include means for operating the shaft which is common to all such devices. numeral 1 indicates a circular hopper which is connected to a tubular packing cylinder 2 by means of a tapered section 3. Cylinder is further reduced in diameter by means of a tapered inner tube 4r which terminates in a straight portion The inner tube 4 is placed within the cylinder 2 and projects slightly below the bottom of cylinder The space between the inner and outer cylinder at the bottom of the cylinder is closed by means of a ring 6. A shaft 7 passes centrally through the device and is provided with packer heads 8, 9, and 11., all of which are secured to the said shaft. The packer heads are oi? diameters which correspond with their position in the packing tube. All of the packing heads are in the "tor-in of helical blades and are of varying pitch, those nearest the bottom of the casing being ot the less diameter and less pitch, with the result that the tlour as it passes to the heads from the hopper 1 is discharged from the packer head 8 downward to the packer head 9 which takes the flour to its first stage of packing and passes it toward the packer head 10 with an additional compression. The packer 10 gives the flour a further compacting and passes it to the last packer 11 which further packs the flour and discharges it in the form of a hard and compact core. It will be noted that be tween the packers 10 and 11 the diameter of the flour core is reduced by means of a tapered portion i. The packers act in much the same way as the multiple stage centrifugal pump unit in that each successive packer takes the flour under a certain amount of pressure and delivers it at a still greater pressure. The packers and the shaft 7 are continuously revolved by any power means. A sack 13 fits over the packing cylinder 2 and the "flour core is discharged directly into it. As the core moves downward it carries the sack with it. As the core leaves the sharp edges of the inner casing 5 a thin outer layer is spalled off from the core of flour and expanding up ward within the ofiset 1st outside of inner tube 5 and below ring 6 forms a soft and fluffy layer which fills the space between the core of flour and the sack. This action is much the same as that of a stream of water under high pressure flowing through a sharp edged orifice in that the instant release of the confining pressure allows the outer film to separate from the main body of the stream. Our device has proven very successful and economical in actual operations and has replaced modern packers of other types. 6 further find that a given weight of flour can be packed in a considerably smaller sack with our packer than with others, with the result that a saving in sack material is accomplished. o further have less breakage of sacks due, we believe, to the soft layer of flour which is interposed between the hard core and the sack, due also to the fact that we pack the flour within the tube and not against the sides of the sack. Other appliances provide for the sack receivin g the stress of the packing which often causes the sack to split.

While we have shown a particular form of embodiment of our invention, we are aware that many minor changes therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invention, and we therefore desire to avoid being limited to the exact form shown and described. Having described our invention, what we claim as new and desire to protect by Letters Patent, is

1. In a device of the class described, the combination of a packing cylinder, a plurality of packer heads within said cylinder and means for forming an envelop of soft material around a compact core of material as it discharges from the packing cylinder, whereby when the said core is discharged into a sack, a layer of soft material is placed between the said core and the sack.

2. In an apparatus for packing powdery materials into receptacles, the combination of a cylindrical packing case terminating in a sharp edged orifice at its lower end, an annular offset adjacent the lower edge of said packing case and a series of multiple stage packing heads revolubly mounted within said packing case, whereby the'material to be packed is formed. into a hard and continuous core.

3. In an apparatus for packing powdery materials into receptacles, the combination of a cylindrical outer packing case, a tapered inner casing within the said outer casing the lower end of said inner casing projecting slightly beyond the lower end of said outer casing, whereby an ofi-set is formed between the lower ends of said casings, a receptacle which fits slidably over the said outer casing, a multiple stage graduated series of spiral packer heads mounted upon a common shaft which passes centrally through the said casings, whereby the powdery material is packed and further compressed by' each successive packer head and is finally discharged from the lowest head in the form of a continuous hard core, of smaller diameter than the receptacle into which it is discharged, the outer film of said core being spalled off as it leaves the inner casing and forming a soft layer between the said core and the said receptacle.

BORDEN D. COOK. JOHN N. COOK. CHARLES V. COOK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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