US1776244A - Shearing machine - Google Patents

Description

sept. 23, 1930. E 'HANSEN 1,176,244

SHEARING MACHINE Filed June 23, 1928 4 "71 @i f7 E71 Patented Sept. 23, 1930 UNITED* STATES PATENT' Feier f.

FRIEDRICH BANSEN, or LEIPZIG, GERMANY, AssIGNon To WILLY ItABALn, or

. LEIPZIG, GERMANY sIIEARING MACHINE Application filed .Tune 23, 1928, Serial No. 287,833, and in `Germany February 16, 1927. i

My invention relates to machines for shearing fur, plush',velvet, etc., for which I have made application for patent in Germany, February 16, 1927 In the following description, only 'fur Willbe mentioned but this is only byjvay of example and it is understood that my m'achine may be used for shearing any material;V The machine is of the type 1n which the furs are engaged by positive means only While beingv presented to a shearing roller and otherwise are only moved by friction on a conveyer. o

It is an object of myinvention to improve a machine of this type so as to prevent damage to the furs and to this end I provide'pairs of j ibs having needles for positively engaging the fui-s, and I so operate these j ibs that their needles are moved into positive engaging relation only When the fur is being presented to the shearing means.

Heretofore the furs Were held by pins or by Ysteel4 bands having sharp points Which penetrate into the skin. It has also been proposed to hold theofurs by suction through the medium of a perforated hollow cylinder. Pinsor steel bands are' objectionable as their manipulation 'requires considerable skill and often cause damage to the furs While a suction cylinder and its vacuumy pump constitute an undesirable complication -of the ma# chine'.

It has also been proposed to provide curved needle supports and to cause their needles to project from holes in a barrel of a guiding vcylinder at given intervals but slich needles make slotted'holes in the fur ivhich may detract considerably from its value. A

These drawbacks are'overcome in my in- ;40 vention'. My'machine is automatic to the elimination of the"p`erson'al factor and the needles ofthe jibsare so advanced andl retracted ast avoid damage to the furs by unduly extending the "holes therein.4

In ap-refer'red embodiment of my Vinvention provide aI guiding cylinder for the furs, or rather, the conveyer by Which they are fed, the guiding cylinder being so arranged With respect to shearing means that it presents the fur yto the means in proper posi'- 50 tion, and in lutes of this cylinder I provide pairs of j ibs, each jib having` a set of needles and the needles in the jibsof each pair projecting in opposite directions'. Means are providedlfor displacing the jibs in opposite directions at a given moment, that is,`\vhen the fur is presented'tothe shearing roller, and the points of each two needles Will then form Vshaped hooks for'retaining the fur vvhilei-t isbeing thus presented. Automatic means such assprings may be provided for re'tnining the jibs and consequently the needles, to their initial positions.

It is'another object of my invention to provide 'resilientmeans' in combination With 65 the lnted cylinder for exerting pressure on the fur WhileV it isl beingv gradually engaged by the needles and to this end I provide a ,roller having ya liner of resilient material opposite the flute'd cylinder. Thisis im`- 70 portant as the thickness of the furs, and of a given fur at several points issnbjectto considerable variations. rIhe resilient surface makes up lfor such variations and maintains uniform pressure. y y

In the drawing aiiiiled to this specification and forming part thereof a machine embody ing my invention is illustrated diagram! matically Way of example.

In the drawing 80 Fig. l isa diagrammatic elevation of the machine,

Fig. 2 is a cross section, and o Fig.' 3 is' av plan'vieiv drawn toa larger scale, of the end at Which theV lut'ed roller S5 is carried. y

Fig. 4 is a plan vevv of the luted roller drawn to a still larger scale,

Fig. 5 is a detail illustration of one of the strips, v

Fig. 6 is a corresponding illustration of the mating strip,

Figs. 7, 8 and 9, are sections on the correspending lines in Fig.v 4,

Fig; 10 is an elevation,

Fig. 11 is a plan view of one of the cams by which the jibs in the fluted roller are controlled,

Figs. 12 to 15 are details illustrating various relative positions of the strips in a pair.

Referring now to the drawing, 7 is a frame at one end of which a set of rollers is supported in suitable bearings 3, 3, 19 is a conveyer which moves toward theset of rollers in its upper and away from the set in its lower reach, as indicated by the arrows in Figs. 1 and 2, 2O is a tension roller at the end of.

' the frame opposite to t-he set of rollers, 21 are brackets at either end of the frame, and 22 are threaded spindles inserted in the brackets and adapted to displace the roller, only one bracket and one spindle being shown in Fig. 1. The set of rollers comprises a cutting roller 1; a fluted guiding cylinder 2 having trunnions 24; a guidimg` roller Si, the conveyor 19 moving about the fiute'd roller 2 and returning past the roller 6 as will appear from Fig. 2; a roller 18 provided witha lining 17 of resilient material, as rubber, arranged intermediate and above,-the cylinder 2 and the roller G; and rollers 4, 5 exerting pressure on the resilient liner 17. y 7 8 are jibs inserted in suitable flutes of the cylinder, 11 are blocks adapted to slide 1 in the ends of each flute, one of the jibs being in direct contact with the corresponding slide 11 at one end and a spring 12 being inserted between the other end of the j ib and the block 11 at that end. For the other jib, the arrangement is reversed as will appear from Fig. 4. 10, 10 are sleeves concealing the block 11 and the ends of the ibs at either end of the cylinder 2. The ends of the blocks 11 project at either end of the cylinder and cooperate with cams 13. 16, 16 are pins on the outer face of each cam by which the cams are held in the bearing 3, 3, 13 is a slope, and 13b is a step in the face of each cam as will appear from Figs. 10 and 11, the slope and the step pitched at about 180 degrees.

Each jib 8, 9 is provided with needles 14 and 15 inserted in suitable grooves in the inner faces of the jibs 8 and 9, respectively, as best seen in Figs. 12 and 13 from which it will also appear that the needles project in opposite directions in eitherjib, the needles 14 of the jibs S pointing to the right and the needles 15 of the jibs 9 pointing to the left. Obviously, the direction of the needles may be reversed in the jibs.

In the normal position of the needles, that is, when the ends of the blocks 11 for the corresponding pairs of jibs move on the parallel faces of the cams 13, 13,`the needles 14, 15 are in the position illustratedin Figs. 5 and 14, in which their ends'k meet. The cylinder rotates clockwise. When during such rota-A tion the blocks 11 of a given pair of jibs ascend Y the slopes 13a on the cams 13 which occurs at about the same time as the pair of jibs under consideration enters the zone in lwhich the roller 18 begins to exert pressure on the fur between its liner 17 and the luted cylinder 2, t-he blocks gradually move inwards and each block displaces that jib with which it is positively connected while compressing the spring 12 of the other jib. The jibs therefore move in opposite directions causing the needles 14 and 15 to penetrate the fur in opposite directions also and after such penetration has been completed, forming V-shaped hooks as indicated in Figs. 6 and 15. The jibs remain in this position and retain the fur on the fluted cylinder until their blocks reach the step 13, which they descend abruptly. 1t follows that the needles will penetrate the skin gradually underthe influence of the slope 113a so that the skin is not torn by needles, and will be retracted suddenly when the blocks arrive at the set 13". While the needles penetrate into the skin, the fur is retained by the 'resilient liner ofthe roller 18 sothat'the fur does not recede before the points of theneedles but is penetrated properly. V

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

1. A shearing machine comprising shearing means and means for presenting an object -to said shearing means,l said presenting means having a pair of jibs, each liib having a set of needles, the needles in each set projecting in opposite directions, `means for imparting movement in opposite directions te said jibs, and means for timing the movement of said liibs with respectto the operatiou of said presenting means.

2. A shearing machine comprising shearing means, a conveyer adapted to present articles to said shearing means, a cylinder adjacent said shearing means and adapted to support said conveyor, pairs of jibs in said cylinder, each jib ina pair having a set of needles projecting in opposite direction to the needles of the other jib, means for exerting pressure on said conveyer, and on said cylinder, means for imparting movement in opposite directions to said liibs, and means for timing the movement of said jibs with respect to the action of said pressure-exerting means.

3. A shearing machine comprising shearing means, a' conveyer adapted to present articles to said shearing means, a cylinder'adjacent said shearing means and adapted to support said conveyer, pairs vof jibs in saidV cylinder, each jib ina pair having'a set 'of needles projecting in'opposite direction to the izo vneedles of the other jib, means for exerting pressure on said conveyer, and on said cylinder, a block arranged at either end of each pair of jibs in said cylinder, each block engaging one of said jibs positively, a spring inserted between said block and the other j ib, and a stationary cam adapted to cooperate with each set of blocks.

4. A shearing machine comprising shearing means, a conveyer adapted-to present articles to said shearing means, a cylinder adj acent said shearing means and adapted to support said conveyer, pairs of jibs in said cylinder, each jib in a pair having a-set of needles projecting in opposite direction to the needles of the other jib, a roller having a liner of resilient material and arranged t-o exert pressure on said conveyor, on an article on said conveyor and on said cylinder, means for imparting movement in opposite directions to said jibs, and means for timing the movement of said jibs With respect to the action of said resilient liner.

5. A shearing machine comprising shearing means, a conveyer adapted to present articles to said shearing means, a cylinder adjacent said shearing means and adapted to support said conveyer, pairs of jibs in said cylinder, each jib in a pair having a set of needles projecting in opposite direction to the needles of of the other jib, a roller having a liner of resilient material and arranged to exert pressure on said conveyer, on an article on said conveyer and on said cylinder, rollers adapted to exert pressure on said liner, means for imparting movement in opposite directions to said jibs, and means for timing the movement of said jibs With respect to the action of said resilient liner.

6. A shearing machine comprising shearing means, a conveyer adapted to present articles to said shearing means, a cylinder adjacent said shearing means and adapted to support said conveyor, pairs of jibs in said cylinder, each jib in a pair having a set of needles projecting in opposite direction to the needles of the other jib, means for exerting pressure on said conveyer, and on said cylinder, a block arranged at either end or' each pairs of jibs in said cylinder, each block engaging one of said jibs positively, a spring inserted between said block and the other jib, a sleeve at either end of said cylinder for holding said blocks in position radially, and a stationary cam adapted to cooperate with each set of blocks.

7. A shearing machine comprising shearing means, a cylinder arranged opposite said shearing means, needles on said cylinder projecting in opposite directions and means for moving said needles in opposite directions during the shearing operation and for returning said needles into their initial position after the shearing operation has been completed.

8. A shearing machine comprising shearamy

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