US2493924A

US2493924A - Pelt stretching machine

Info

Publication number: US2493924A
Application number: US75570A
Authority: US
Inventors: John J Mowad
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-02-10
Filing date: 1949-02-10
Publication date: 1950-01-10
Anticipated expiration: 1967-01-10

Description

Jan, 1, 195@ J. J. MOWAD 9 3 I FELT STRETCHING MACHINE Filed Feb. 10, 1949 6 Sheets-Sheet l Jan. 10, 1956 J. J. MOWAD 274939924 PELT STRETCHING MACHINE Filed Feb. 10. 1949 e Sheets-Sheet 2 INVENTOR.

day/v Mon Hp Jan. 10, 1950 J. J. MOWAD FELT STRETCHING momma Filed Feb. 10, 1949 6 Sheets-Sheet 3 I INVENTOR. da /N d. Man #0 flrrOR/VEY Jan. 10, 1950 J. J. MOWAD PELT STRETCHING MACHINE 6 Sheets-Sheet 5 Filed Feb. 10, 1949 M-QW INVENTOR.

Y i C/OH/V (Z Mon 40 Jam-10, 1950 I J. J. MOWAD 14 9 FELT STRETCHING MACHlNE Filed Feb. 10, 1949 6 Sheets-Sheet 6 INVEN TOR.

(/OH/V Mon/470 Patented Jan. 10, 1950 UNI TED .S IAT3E:S PATENT DFFl-CE 'iPEL'I. .S TRETCHING -MAGH1N E llo'hn Mowad, Newark, J.

Application February 10, 194L1Serial 75,5370

(cite--33.)

iiGlaims. 1

This invention deals with means for stretching pelts, and more specifically, 'to novel machines-for two-directional stretching of pelts used "in the hatters fur and similar industries.

Among the noveljfeatures embodied in 'the present invention are rapid means for changing the rate of stretch by changing of only a few gears, also the prevention of sticking of ,pelts to the rolls and independent adjustment of pressure pn each set of rolls. Other improvements include ready removal of the upper section "of the machine without the necessity of disenga g belts orgears, easy adjustment of spacing of the rollers, and ready accessibility of all parts.

The invention will be .more readily understood by'reference'tothe drawings in which'Figure .1 a 'front view of one embodiment of a machine constructed in accordance 'with the "present invention. Figure 2 'is-a rear "view 'of'the same machine. The right side view of the machine is illustrated in Figure 3, while "Figure '4 is 'a'partial top view showing the right portion of the machine. A cross-'sectionalview'o'f thesame'machine, taken along line VV of "Figure 1 is depicted in Figure 5. Figure-6 is a side View showing the bearing box detail, while Figure '7 is a schematic drawing illustratingthe stretching of a peltas it is drawn "through *the machine. "Similar numerals refer to similar parts in the various figures.

Referring again to the drawings, numerals "I and -2 represent a pair of laterally ribbed, counter-rotating rollers superimposed upon 'eachioth'er with ribs meshing so 'as to enable drawing therethrough of pelt 65 ied'therebetween. Theserdllers are mounted at their ends on frame It atta'ched to frame support t "bymeans of bolts f1. Reinforcing cross bars 13 and HS are disposed "between supports l5. Behind 'rollers I 'and'iz are mounted, in tandem relation thereto, another pair of rollers "3 and lyalso superimposed on'eac'h other, counter-rotating, and ribbed in a similar manner to rollers I and '2 and rotating atafaster speed so that pelt 65 passing between rollers land 2 is stretched lengthwise as it is picked 'up and drawn between rollers '3 'and l. "The latter two rollersiare preferablyinibbed imherringmone fashion .as illustrated in the drawingsso that the pelt is also stretched sidewise aszitis pulled between rollers-3 and'l.

Upper rolls

1 and 3 are also provided withrcirequal to the heightiofitheiribs. These grooves rare spaced close enough together to insure at least filj 2 one :.contacting the pelt .to be stretched. This spacing may be about 3 to -6 apart, more or. less. Mounted on the frames (which compriseithessides of the-machine? are front finger bar .5 and rear finger bar 28 \disposed above the upper rolls il and 3 respectively and somewhat outwardl from the centers thereof. Attached to .

saidfinger bars

6 and 28, and disposed downwardly .are :arms :or front fingers i5 and rear fingers 29, respectively, the bottom tips of which ride in grooves and BI. respectively, thereby :enabling :picking up of pelts which may have stuck *to the upper rolls and would otherwise make another revolution around .them, thereby causing damage to :such pelts as well as; others which may :ha-Ve been ,fed between the rolls :in the interim. The front finger bar 6 is attached to support 20 whichprojects from hearing box top plate 1-9 attached to the =top-offrame H3. The rear finger :bar 28;-is attached to .bar clamp 21 which .is fastened to plate 3.0 ,bymeansof screw 15. -Screw M .isalso provided for fixing ithe ,position of finger bar 2% (Fig.6).

. As can be seen in Riga- 6, the .ends 1of the rollers l, 2, .3 .and l .are provided 'withjournals -2 l ,:22, :13 and 1211, respectively which are encased :in :bearing .boxes 35., .36 and 31., the .latter :being va rm ideii with replaceablesplit bronze bushings :39 in which each .of .the shafts rotates. It will be .observed that hearing box 3! (split lengthwise atJ-fl) and resting .on .frame 18, is .a single block encasing journals '22 and .24, while Journals 2 I and 23 are separately encased in bearing :boxes 35 and 3.6 which are disposed .oy'erdil and separated :therefrom 'Joyspacer plate 38. Plate 1:8 which serves as .a hearing box .guide is v mounted on frame 15 by means of bolts I1 and is provided withdtop plate I9 which ,is fastened to frame 48 land \iS provided withfholes 1| through which'or in which ride helical springs .32 and-32 i, :a pairon'eachend of the .machine .for impressing .a pressure upon the upper rolls. .Due to the fact that hearing boxes 35 and 36 areseparatedat .12, it is possible to impose different pressures upon rolls :1 and The upper portions .of springs 32 which emerge above plate 19 are .housed .in hollow cylindrical sleevesor guides 3L These arecovered by adjust,

ing screw plate .30 which is'held tight by bolt'rfi3 .screwed into plate I9, which bolt also holds -in place guides "3| aingrooves 13in ,plate I9. vSprings 32.-arecovere.d .by ,pressure .plate 168-021 which pressure .is transmitted by .means of spring adjusting screws .33 provided -.With .lock .nuts 3.4.

Attached to side frame membersonsupports J5 (on each side of the machine) are base plates I] (Fig. 3) on which are mounted the ends of adjustable arm 40 by means of bolts 44. The ends of arm 40 are provided with arcuate slots 14 in which bolts 44 ride. By this means it is possible to loosen bolts 44 and rotate arm 40 (to a limited extent, i. e. the limits of slots 14) with the center section of arms 40 acting as the .center or axis of rotation.

At the center ofrotation are mounted the ends of drive shaft M which project out from plates40 and allow mounting thereon of gear I2. Along side gears I2, and fixed to plate 40 (reversibly disposed on each side of the machine) is vertically directed arm 15, on the upper portion of which is mounted short shaft 42 carrying changeable gear I0 and gear H and provided with'compound bushing 43. Gear ll meshes with gear 12. Gear [0 may be changed and larger or smaller gears may be substituted, adjustment being made at the ends 14 of arm 40, corresponding to the size of the gear.

Journal 22 projects on one side of the machine and on said projection is mounted gear 9 which engages gear I0. Likewise, journal 24 extends from the other end of the machine and carries a similar gear, both gear trains being driven by drive-shaft l4.

Each pair of rolls is geared together on the opposite side from the driven gear train. For example, gears l and 8 are used to transmit rotary motion to roller I while gears 25, etc. act in the same manner for roller 3. Drive shaft I4 is provided with pulley 46 which is connected by a belt to pulley 41 of motor 48 mounted on lower crossbars [6. Clamp 45 is attached to the end of shaft 42 to hold the gear in place after changing gears. Clamps 64 are mounted on the frame to hold the ear covers. a

The front and rear of the machine are provided with tiltable tables '54 and 55 respectively (Fig. which are not shown in Figs. 1 and 2. These are mounted on upper cross-bars I3 by table adjusting clamps 56 and bolts 51, the tables being of such height as to allow sliding of pelts from the table directly between rolls l and 2. A finger guard 5| is also attached to guard assembly'frame 49, allowing an adjustable feeding space which will not allow the fingers of the operator to con tact the rolls. Top plate 50 is likewise mounted over guard assembly frame 49 to cover the upper r'oll sections (Fig. 4). V

As can be seen from Fig. '7, the rough, wrinkled pelts 65 are fed between rollers l and 2, and thence between

faster rollers

3 and 4 which causes stretching at 66, the herringbone corrugationsof rolls 3' and 4 also simultaneously stretching the pelt sideways to deposit an overall stretched pelt on rear table 55.

As is apparent from the foregoing, the machine of the present invention requires no manual labor on the part of the operator other than placing the pelt on the front table and feeding it into the opening between the finger guard and the table, the pelt being stretched without injury to the fur itself. By independent control of the pressure on each upper roll, the quality of the finished pelt may be maintained. Since the gears are readily changeable in the gear trains, speeds may be adjusted to take care of any type of pelt handled. V

Although herringbone grooved rollers are shown in the drawings for the rear pair (3 and 4), it is to be understood that a straight grooving of these rolls may be employed, similar to that employed on rollers l and 2.

aspect to the first gear, thereby enabling use of pelt may take place.

Shaft l4 has its main bearings l5 fixed to the sides of the frame I5 by means of crossbars. Hence this shaft is not moved when plates are moved or adjusted to accommodate different gears. Vertical movement of plate or arms 40 may be extended beyond the limits of arcuate slots 14 by providing additional holes in plate 4| through which bolts 44 may be inserted (above and below the positions of the bolts 44 shown in Fig.-3)..- 1 V Inthe presentmachine, it is necessary to provide for slippage of pelt 65 between the rollers in each pair of rollers, as otherwise tearing of the This slippage is controlled by adjusting the pressure on the upper rolls by compressing springs 32 and 32' as heretofore outlined.

For' sake of clarity, the pairs of rollers illustrated in Figures 5 and 6 are not shown as meshing with each other. Actually, the rolls mesh as in Figure 7, but not tightly enough to clash to avoid excessive wear of roller surface.

, I claim:

1. In a pelt-stretching machine having a pair of superimposed laterally-ribbed, counter-rotating rollers, geared to each other for feeding therebetween the pelt to be stretched, followed in tandem relation thereto by another pair of ribbed counter-rotating rollers, geared to each other for pulling the pelt therebetween as said pelt is discharged from the first pair of rollers, said second pair of rollers rotating at a speed faster than that of the first pair, a support attached to the ends of said rollers, and driving means for driving said rollers, the improvement comprising a cross-arm mounted substantially, laterally across each side of the frame under the ends of said rollers, adjustable fastening means near the ends of each cross-arm enabling fastening said cross-arm to the frame in any position of said cross-arm after the latter has been moved within a fixed limit inan arc with the middle portion of the crossarm acting as the center of rotation of said are,

a drive-shaft disposed between the cross-arms and having its ends mounted thereon at said center of rotation, a first gear mounted on each and in operating contact with the third gear, and

power transmitting means from said driving means to said driveshafteach second gear being offset undera different pair of rollers, with redifferent gear ratios at each 'Side of the frame to provide different speeds for each pair of rollers while using shaft. 7 I

1 2. A pelt stretching machine according to claim I lin which the upper rolls are provided with circumferentially out continuous grooves of depth substantially equal to the height of the ribs, a cross-bar mounted above each upper roll and.

parallel thereto and attached to the sides of the frame, and downwardly disposed fingers having their upper ends attached to said latter crossbars and their lower ends riding in the grooves 7 at the outer sections of therolls to disengage any I only one driving means and drivepelts which may have begun a second revolution around said rolls. 5

3. A pelt stretching machine according to claim 1 in which the ends offthe rolls are provided with shafts riding in bearing blocks, the two lower shafts being encased in one block and the upper two shafts being encased in separate blocks superimposed upon the first block.

4. A pelt stretching niachine according to claim 3 in which the frame above the blocks is provided with cylinders fixed the frame and disposed one over each upper block, a helical spring disposed within each cylinder with the bottom of the 10 gether when desired.

JOHN J. MOWAD.

No references cited.