US1355437A

US1355437A - Leather-working machine

Info

Publication number: US1355437A
Application number: US375781A
Authority: US
Inventors: Wayland Frank
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-04-22
Filing date: 1920-04-22
Publication date: 1920-10-12
Anticipated expiration: 1937-10-12

Description

F. WAYLAND. LEATHER WORKING MACHINE. APPLICATION man ^Pn.22. 1920.

1,355,437. Patented 00u 12,1920.

3 SHEETS-SHEET l.

F. .WAYLAND. LEATHER- WORKING MACHINE.

APPLICATION FILED APR. 22. 1920.

Patellted Oct. 12, 1920.

3 SHEETS-SHEET 2.

Zara@ www 270067 fraz/ F. WAYLAND.

LEATHER WORKING MACHINE.

APPuATloN msn APR. 22, 1920.

1,355,437. Y Patented (m2121920.

3 SHEETS-SHEET a.

` wise treating skins,

UNITED STATES;

PafrENT l o FFlicE.

FRANK WAYLAND, OF SALEM, .MASSACHUSETTS LEATHER-WORKING MACHINE.

Speccatonof Letters Patent. i `PatentedOct.' 12, 1920.

iippiicationiea Aprii 22, 1920; serial No. 375,781.

stretching, pressing, putting out, and other-V hides and leather and consists in certain improvements hereinafter described-on machines of the general char-.- acter 'illustratedwin Letters Patent of the United States issued to me Nos. 1,077,207; 1,090,895; 1,131,756; 1,204,914; and

1,214,852. In machines of tlievkind represented by the foregoing patents pinch rolls or feed rolls draw the skins between various forms of working elements for stretching, staking, softening, putting out, ironing, glazing or otherwise' working the I skins.

The pinch rolls themselves in certain in-v stances also serve both as feed rolls and` working lelements. VFor performing `work of this kind it is essential thatvery considerable pressure be exerted onthe skin by the pinch rolls in order `properly `to feed the skin through the machine, to squeeze Vout the water and' press'the skin, and 'to maintainthe necessary tension on the skin. H itherto, this pressure between the pinch rolls has been'exerted mainly by applying powerto the swinging frame whichvcarries the separable pinch'roll or rolls to force the latter directly against the positionally fixed roll or rolls. penditure of a large amount of power directly applied to the swinging frame`to push one roller against another. Iiifsome instances the pinching pressure has lbeen supplemented by additional mechanism "for applying an increased inal'pressure after the rolls have been brought vinto operative relation.

It is the principal objectof'the present invention to improve k.the construction and co-action of the pinch lrolls to attainfhigh pressure between the pinch rollswith amore simple and easily operable construction and with Vthe expenditure 'of'relatively little power. Other features ofthe invention will be hereinafter described and'more particularly pointed out in the claims.

In the accompanying drawings which illust-rate 'one embodiment of the invention:

This requires the ex-l Figure 1 is a vertical section of such parts of the machine as are necessary to 'an understanding of the invention, certain parts being shown in elevation;

Fig. 2 is a front elevation kof, one end of the machine; v

Fig. 3 is an enlarged detail inyend elevation of the top of the machine showing the separable roll carried by the swinging arm` in open position; rand Fig. 4 is a-diagrammatic View illustrating one of the pairs of stretching and/tension belts in plan.

The main frame of the machine 1 carries all the working parts and is preferably constructed of castings. A pair of rocking frames 2, l2, one at each end of the main frame, are mounted to rock or oscillate on shaft 3 which is a driving shaft journaled at its ends at the top of the main frame.A A gear tkeyedto shaft 3 meshes with gears `5 and 6 keyed respectively to'shafts`7 and'8.

Shafts 7 and 8 are journaled in the rocking frames 2 2 and carry pinch rolls 9 and A10 whichv extendY between the 'rocking frames. The journal boxes 11 and 12 for shafts 7 and 8 are mounted respectively to slide in ways 13 'and 11 inthe rocking 'frames 2 and are pressed downward-and inward by stiff coil compression springs 15 and 16,1the force of whose compression maybe regulated by adjusting

screws

17 and 18 mounted on the rocking frames 2 at the ends ofthe slide ways 13 and 14:. The slide ways 13 and 14 are'preferably disposed at approximately a right angle to eachother.

The rear shaft 7 extends through and 'be- 'yond-the machine frame and has fixed to its outer `end a long toothed gear wheel 19 which serves both as a driving gear and as a finder gear as hereinafter explained.

At each end of the machine just outside of the main frame is a swinging arm 20 pivoted onshaft 23 at the lower part of the machine. Extending between-the upper ends of the two swinging arms 20 is a shaft 21which carries pinch roller 22. Shaft' 21 also extends through slot 37 in the machine frame and has fixed to its outer end a long toothed gear 21 which meshes withgear 19 when the parts are inoperative position'as shown in' Figs. 1 and 2. The pinch rolls 9, 1O1and 22 maybe -coveredwith materials suited tothe workto be y performed. For example n'they may be-,covered with felt, cloth, or 'rubbenasf desired,

abutments againstbracvkets 29 which are fastened to a cross rod orv shaft 30 extending from side to side ofthe machine.V The workingfaceof the presser bar is provided with inclined vanes 3 diverging V:from the v center of the machine to stretch and work out the skin'laterally in'each direction at the i center as it passes between the ,presser bar and the pincharoll 22.-, l A Y Y,

vBelow the pinchmrolls are two pairs of stretching and tension belts, the beltsof'each Y' `pair being mounted end to'end and traveling swinging arms 2O.V The other similar pair of belts with which thefirst pair coperates.V is similarly mounted and drivenkovn a fixed part `of the machine frame, one belt of ther in opposite directions from their adjacent ends. @ne pair .of said belts 32, 33is carried and driven by sprocket wheels 34 mounted on a cross bar35 which extends between vthe latter pair being shown at 36, VFig?. 1. Said belts are substantially similar to those shown in my said LettersPatent No. 1,214,852.- and as neither the belts nor the mechanisms by' which they` aremounted and driven, form part of the present invention, no further de,- scription of them will be necessary.,

The mechanism for operating the swing. ing arms 20, with the'parts carried thereby, to open and close the pinch rollsrrlikewise forms nopart of the present invention and4 V.need not be Y herein described.V Any well known or preferred mechanism for this purpose may be used Vsuch. as that Vrindicatedrin my PatentgNo. l;,()7.7.,207. Suiiice it to say Y that said swinging arms V20 swing forward to open lnan arc represented approximately by theslot- 37 in the machine frame. Y lThe shaftj3 is the driving shaft for the pinch rolls and `may be rotated from any Y suitable source lof power (not shown). When shaft 3 is driven inthe direction of the arrow,'that is in a. clockwise direction as viewed inFig. 1, it will turn shafts 7 and 3 through' gears-'5 and @together with their

rolls

9 and 10; in a-counter-clockwise direction as indicated by arrows, and gear 19 on shaft 7 meshing with gear 24 on shaft2`l will turn fthe latterftogether with pinch roll 22 in a clockwise direction. f f

lnoperation, assuming thatfthe swinging frame composed of arms 20 has been swung forward, thefroll 22 will be opened Aor separatedjfrbre the .Otherpinch rolls) as, shown drying, pressing, or putting the fixed machine frame.

in Fig. 3 and the stretching andtension Abelts 32, 33 will be likewise separated from the correspondingopposed belts mounted on Y The skin isV then laid into the machine behind or on top of the pinch 110117227 and belts 32, 33,V and the swinging" arms 20 will be swungto operai tive or closed position as shown in Fig. 1. Y

As the frame 2 is'free torock or oscillate vthe pinch roll 22 willengage both rolls 9Y and 10 beforeA exerting ,Y any considerable pressure on either and theiinder gear 24 with long pointed'teethwill readily engage and mesh with theisimilariinder gear 19`on shaft y7. .Y Continued movementy of theswing ingyfrani'e causes the several pinch rolls :ict-

ing one upon another vto roll Vinto place, thci so i.

springsrly and 16 compressing as the pressure increases, andthe oscillatingframe2 iinally rockinginto the position shown in Fig. l when the pinch roll 22 reaches its iinal working position. This action of the oscil4' V lating frame k2 in conjunction with the swing. farms' 2O resembles the `action of a toggle joint'exertng-very great pressure between the rolls 9, V10,.'and theroll 22 with the expenditure of comparatively little power for swinging the roll 22 into place. The action of the closing movementfis assistedby the pressureV of the jfront roll'l0which bears against the following side of the roll22. ywhen thel latter by pressing against roll 9, swings or'rocks the oscillating frame 2 It willbe seenthat the principle ofthe toggle joint results fromthe organizationY andar-` rangement of` parts in such manner that the component Aof the force, applied in a tan-1 gential direction for bringing the Vrolls to working position, exerted radiallyY of the rocking frame and the swinging frame rgreatly exceeds the transverse component.

When the roll 22 is in closed position it also bears against the presser bar 25 some what compressing the spring 28.

When in working position the downward pressure of the pair of

rolls

9 and 10 against v the roll 22 is substantially balanced and is exerted approximatelyV in a line connecting the pivots of the rocking-framef2 and the swingingarms 20 so that comparatively little power is required tolroll the parts into working position notwithstanding they are subjected to high pressure one againstthe other. i

The skin is nowvtightly pinchedbetween rolls lO'and 22, rolls y9 and 22, bar 25 and roll 22 and between the stretching and ten-V Y sion belts32, 33 andl their corresponding opl posed pair on the fixed frame ofthemachine.' The drivingshaft3' beino operated, the pinchA rolls will rfeedA the skin upward and` out .ofthe machine squeezing, pressing, stretching and working it out in conjunction with the presser bar25 and its divergent vll-iet Spread, and Stretchcthe,

' skin-:laterally and Ain conjunction with the npwardby the pinch rolls.

stretching andtension beltswhich not only straightenand stretch the skin laterallybefore it passes `to the Vpinchfrolls but also put a longitudinal tension on it as itis pulled I claim: Y y

1. A leather working machine comprising azrockingffram'e, pinch rolls journaled on the rocking frame, and a swinging frame having a pinch roll journaled at the freeend thereof cooperating with the pinch rolls on the rocking frame torock the latter when the swinging frame is `forced into working position and to exert high pressure between the coacting pinch rolls, the parts being so organized and arranged that the component of the force applied for bringing the rolls to working positionexerted radially of the rocking frame and the swinging frame greatly exceeds the transverse component, according to the principle of the toggle joint.

2. A leather working machine comprising a rocking frame', pinch rolls journaled in yielding bearings on the rocking frame, and a swinging frame having a pinch roll journaled at the free end thereof coperating with the pinch rolls on the rocking frame to rock the latter when the swinging frame isV forced into working position and to exert high pressure betweenthe coacting pinch rolls, the parts being so organized and arranged that the component of the force applied for bringing the rolls to working position exerted radially of the rocking frame and the swinging frame greatly exceeds the transverse component, according tothe principle of the toggle joint.

3. A leather working machine comprising a rocking frame, a pair of pinch rolls journaled on the rocking frame, one at each side of the pivot of the rocking frame, and a swinging fra-me having a pinch roll journaled at the free end thereof cooperating with the pinch rolls on the rocking frame to rock the latter when the swinging frame is forced into working position and to exert high pressure between the coacting pinch rolls, the parts being so organized and arranged that the component of the force applied for bringing the rolls to working position exerted radially of the working frame and the swinging frame greatly exceeds the transverse component7 according to the principle of the toggle oint.

4. A leather `working machine comprising a rocking frame, pinch rolls journaled on the rocking frame7 and a swinging frame having a pinch roll journaled at the free end thereof coperating with the pinch rolls on the rocking frame to rock the latter when the swinging frame is forced into working position and to exert high pressure between the coacting pinchfrolls, Iand a presser bar supported on the machine frame below the rocking frame,- adapted toengage the pinch roll on the swinging frame when the latter isclosed, the'fparts beingso organized and arranged 'that thercomponent of the forceY applied for bringing the rolls to working position exerted radially of theV rocking frame 'and theswinging frame greatly exceeds the transverse component, according to the principle of the toggle joint.

5. A leather working machine comprising a rocking' frame, pinch rolls journaled in yielding bearings mounted to slidein ways arranged at an angle to each other on the rocking frame, and a swinging frame havn ing a pinch roll journaled at the free end thereof coperating with ,the pinch rolls onthe rocking frame to rock the latter when the swinging frame is forced into working position and to exert high pressure between the coacting pinch rolls, the parts being so organized andarranged that the component of the force applied for bringing the rolls to working position exerted radially of the rocking frame and the swinging frame greatly exceeds the transverse component, according to the kprinciple of the toggle joint.

6. A leather working machine comprising arocking frame, a pair of pinch rolls journaled on the rocking frame, and a swinging frame having a pinch roll journaled at the free end thereof cooperating with the pinch rolls on the rocking frame to rock the Vlatter when the swinging frame is forced into working position and to exert pressure between the coacting pinch rolls,

the front roll on the rocking frame being r adapted tov press on the following side of the roll on the swinging arm during the closing movement of the latter.

7. A leather working machine comprising a rockin frame, a drive shaft on which the rocking rame is pivoted, a pair of pinch rolls journaled on the rocking frame one at each side of the pivot of the rocking frame, gears fixed to said pinch rolls, a driving gear fixed to the drive shaft and meshing with both gears xed to the pinch rolls, a swinging frame having a pinch roll journaled at its free end coperating with the pinch rolls on the rocking frame to rock the latter when the rolls are forced into working position and to exert high pressure between the coacting pinch rolls, and driving gears connecting said pinch roll on the swinging frame to one of the pinch rolls on the rock frame when the swinging frame is in closed position.

8. A leather working machine comprising a rocking frame, a drive shaft on which the rocking frame is pivoted, a pair of pinch rolls journaled on the rocking frame one at each side of the pivot of the rocking frame,

gears fixed to said pinch ro11s,a driving gear fixed tothe drivershaft and-meshing with both gears fixed to thefpinch r011s',a swinging frame having a pinch roll joun naled at itsl free end coperating with the pinch rolls on the rocking frame to rock the latter when the rolls are Vforced into Working position andV to exert high pressure l ybetween `the Coacting pinchro11s, and driv# ing and finder gears having elongatedteeth 10 connecting said pinch -.ro11 on the'svvinging frame to one ofthe pinch rolls on fthe rock ingi frame'vvhen the closed position.

Signed by me af' Boston, Massachusetts 1.15

swingingV frame is in