US 2253362 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
f w. c. BRor-:Kl--mYsENA METAL REMO-VER FORTOBACCO FEEDS Filed Jan. 51, 1939 Aug. 19, 1941 INVENTOR BY. @ae/l? en ATTORNEY VPatented Aug. 19, 1941 IUNrrlszn s'rA'rlg-:s PATENT OFFICE "passasse 7 l to International Cigar corporation of New Jersey 1 Application January si, im, sum No. :sans z emma (ci. zes-zin 'rms invention relates tcmetn remover; for
y tobacco feeds. its main object being to clear a loying ingredients I,and extending transversely across the tobacco stream. with their free poles a short distance W4 to 1") `above a vibratori! deck.' or/in the particular embodiment illustrated.. the deliverylip o! the feed hopper. The
nominal composition of on example of "Alnico" 4is C 0.15%, Mn and 'Si 0.4% Tntal, A1 12%, Nl
20%, Co 5% and remainder Fe. The above proportions are approximate. and may vary con,
This device' is rendered commercially practical for tobacco feeds -handling scrap tobacco: (i) by the greatly increased effectiveness o! the Alnico -over ordinary permanent magnets.
principally aluminum. nickel and cobalt as al- COMM 8 At a ,midway point in the length of troimh i z there is supported. in a vertical position, a row of .cylindrical "Alnico permanent magnets I. thesey magnets being vertically adjustable so that their tree ends N hang a small distance above the top of the tobacco stream T'. A bar i attached to -frame brackets Ill which support the shalt Il -of the control plate 1 is provided with vertical bores for the reception of the magnets l which are secured therein in any desired vertical position by set screws I2. The space between the tops of brackets il is enclosed by a cover I3. The hopper is equipped with an electric vibrator il which may be of the electromagnene type shown in .the mint Ptent 1,846,326.
issued February 23, i932, to impart oblique vibrations thereto of sufficient frequency to feed the illler tobacco through the magnets.
whereby they may be disposed far enough away from the hopper to permit free passage of the scrap thereunder; and (2) by the ideal condition for removing vmetal on the delivery lip of the feed 4hopper where the tobacco is traveling in a thin, wide stream, while being vibrated. The oblique vibration of the hopper imparts a hopping motion to the metallic objects, giving them a start in the direction of the magnetic pull and facilitating their removal.
In the accompanyi drawing in which this invention is exempliiled in the illler feed of a scrap buncncigar machine such as described in the co-pending application oi.' J. P. Durning.
`Serial N0. 193,244, led March 1, 193,8:
i If any foreign objects of ferrous metal have accidentally entered the tobacco mass, they will be attracted and held by the poles of the magnets 8 and can be removed by the operator from time to time. Small magnets made of "Alnico" steel alloy have suiiicientmagnetic strength to attract small ferrous objects throughcomparativelylarge distances, the pull varying with the shape of the object, being the greater, the larger is the exposed surface are for a given weight. Thus. a 3/4" cylindrical Alnico magnet, 3" long, will Vpick up a Vs" steel ball through a distance of 2%". a small tack, nail or screw. through a distance of 1", and a hair-pin through Fig. 1 is a front elevation showing the delivery end of a vibrating feed hopper, with my improved magnetic separator installed therein:`
Fig. 2 is a sectional side elevation on line 2--2` l of Fig. 1.
Referring-to the drawing, the tobsccc 'r .in
the resiliently supported obliquely vibrating hopper` l is by the oscillating or stationary rakes .I caused to emerge on the delivery lip l in a 'wide stream T' which discharges through theopening l. the ilow of tobacco being periodically stopped by an electrically operated control plate 1 after .a quantity sumcient'for one bunc charge has been delivered.
What is claimed is:
1. In a scrap tobacco feed. the combination with a vibratory hopper. of a set of rakes having their lower ends disposed adjacent the upper face of the bottom of said hopper to limit the flow of scrap tobacco therebetween to a thin stream, a series of magnets beyond said rakes in sumcient proximity to the upper face of the hopper bottom to remove ferrous objects from the en.
.tire depth of the thin stream emerging under the rakes and yet permit unobstructed passage of said stream. and means for vibrating said hopper obliquely toward and away from said magnets to form and advance the stream o! tobacco lthereunder. said hopper having a depressed-lip whereover said magnets are disposed and said raices being disposed at the juncture of said lip with the main portion 'of said hopper to maintain a supply of scrap. tobacco behind saldlilL said lip having a concave bottom and said m98- nets being disposed in perpendicular.relation` ship to said bottom and individually adjustable xially to adapt the same to the contour oi' the 2. In a scrap tobacco feed. the combination with a vibratory hopper, of a set of rakes having their lower ends disposed adjacent the upper face ot the bottom of said hopper to limit the How-oi' scrap tobacco there through to a thin stream, a series' of permanent magnets beyond said rakes in sumcient proximity to the upper face oi the hopper bottom to remove ferrous objects from the entire depth oi' the thin stream emerging under the rakes and yet permit unobstructedpassage oi' said stream, and means for aasaea vibrating said hopper obiiquely toward and away from said magnets Ito form and advance the stream of tobacco thereunder, said hopper having a depressed lip whereover said magnets are disposed and said rakes being disposed at the juncture of said lip with the main portion o! said hopper to maintain a supply of scrap tobacco behind said 1ip, said magnets being formed of a ferrous alloy containing aluminum, nickel and cobalt in the proportions commonly known as AinicoJ WILLIAM C. BROEKHUYSEN.