US730931A - Machine for dressing leather. - Google Patents

Description

PATENTED JUNE 16, 1903.

H. G. LAVINGTON.

MACHINE FOR DRESSING LEATHER.

APPLIOATION IIL 10 1902. 30 MODEL. ED FEB 4 SHEETS-SHEET 1.

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No. 730,931. PATENTED JUNE 16,1903

H. G. LAVINGTON.

MACHINE FOR DRESSING LEATHER.

APPLICATION FILED ran. 10, 1902.

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PATENTEI) JUNE 16, 1903.

H. c. LAVINGTON. MACHINE FOR DRESSING LEATHER.

APPLICATION FILED FEB. 10- 1902.

H0 MODEL.

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nlrllllllrlalll vn I I J YL I llll ll lllll UNITED STATES Patented June 16, 1903.

PATENT OFFICE.

MACHINE FOR DRESSING LEATHER.

SPECIFICATION forming part of Letters Patent ama, dated-Tune I6, 1903. Application filed Pebruary 10,.1i902. Serial No. 93,3l 4. (No model-l To all whom it may concern.-

Be it known that I, HENRY CHARLES LAV- INGTON, leather-dresser, of 3G Bellevue road, New Southgate, in the county of Middlesex, England, have invented certain new and useful Improvements in Machines for Dressing Leather and the Like, of which the following is a specification.

Thisinvention relates to machines fordressingleather, and especially chamois-leather skins, though it is or may be applicable for dressing likematerials to leather. l

The object of the invention is to better and more expeditiously remove from the leather or material under treatment such parts thereof as are not required and at the same time to secure a better surface and finish and a more even thickness than heretofore; and my invention consists in the novel construction of certain parts and in the combinations of the various parts to produce machines adapted to dress either one or both sides of the leather or materials. 7

-A machine for dressing leather madein ac cordance with my invention in one form comprises a rotary drum formed of or coated with material adapted to grind or abrade and remove the superfluous surface of the leather under treatment. This .drum is hereinafter referred to as the grounding drum. The said grounding-drum mounted on a suitable shaft and adapted to be rotated, a resilient work-pressing surface adapted to press one surface of the leather undertreatment against the grounding-dru m, a second rotary grounding-drum mounted on a suitable shaft and adapted to be rotated, a resilient work-pressing surface adapted to press the other surface of the leather against the said second grounding-drum, and means for bringing the said pressing-surfaces andgronnding-drums in and out of working position with respect.

to each other, and means for traveling the leather through the machine mechanically or manually constitute the principal parts of a complete machine. I may also arrange a means for keeping the leather in tension as it passeshthrough themachine and means for spreading-out any creases in the leather before it comes against the grounding-drum.

I" prefereand it constitutes a feature of my invcntion' to'use a rotary grounding drum or drums. made of a cork compound, preferably that technically known as suberit and which comprises resilient material, such as cork impregnated with emery; but I may employ drums 'of 'wood or other material. They are covered with emery powder or emery cloth'o r paper or the like material glued or'clippedor otherwise conveniently attached thereon. f r

' I will now describe my invention with ref- 7 erence to the accompanying drawings.

Figure l is an elevation of the rear or feed side of the machine. Fig. 2 is a section on line a b, Fig. 1,, looking toward the left. Fig. 3 is a sectional plan of the machine, the section being taken on the line 0 d, Fig. 1; and Fig. 4 is a sectional View, on a larger scale, of the resilient rising'and falling work-pressing table, showing the arrangement of the spring-tongues thereof hereinafter described. Fig. 5 is a part plan of the same on the same scale as Fig. 4. Fig. 6 is a detail elevation showing therising and falling brush or pressin its depressed position on this roller. Fig. 7 is a vertical section, on a larger scale, of the spring'buifcr stops hereinafter described for modifying or softening the impact of the table 18 upon the, drum 7 when it is raised to bring the leather against same and for regulating the application of the pressure between the table and drum. Fig. 8 is a sectional front/elevation of one extremity of the perchcarrier, the section being taken through the right-hand side rail 63 on line e f, Fig. 2. Fig. 9 is asectional viewillustrating the modification of the side guards, rising and falling table, and tension-roller above mentioned. Figs. 10 and 11 are diagrammatic views showing modified arrangement of resilient workpressing surfaces.

1, 2, 3, 4, and 5 are suitably-disposed standards or A-frames. 6 is the top frame of the machine, mounted on said standards.

7 is a'grounding-roller mounted on the shaft 8 and running in bearings 9 10 11, formed in brackets attached to the top frame 6.

' 12 is a second grounding-drum mounted on the shaft 13 and running in bearings 14: 15, disposed on the frames 2 and 3.

16 and 17 are tie-rods forbracing the frames 1 2 3 4 together.

ing-surface for the second grounding-roller 18 is a rising and falling table mounted on arms 19, fixed on the rocking shaft 20 and provided with a resilient working face composed of strips of metal-snch, for example, as spring-steel 21 21, (see Figs. 4and 5)forming, as it were, a comb secured to the tableframe at 22.

23 23 are projecting pieces or tongues attached to each of the spring-fingers 21.

24 is an angular rib constituting a stop adapted to engage the tongues 23 and to prevent the free ends of the spring-fingers rising too far and damaging the leather.

25 is a resilient surface constituted by a brush fitted with side pieces or guards 26 26, which extend down beyond the tips of the bristles, so as in the working position'of the;

brush to depress the leather slightly and cause it to conform somewhat to the contour of the grounding-roller 12 before it comes'in con-' tact with the bristles of the brush and as "it leaves the same in order that the bristles may not be unduly disturbed from their normal brush 25 is mounted on 'a frame 29, Figs.2

and 6, having sleeves 3O 3O 31 '31, adapted" to work on the guide-bars 28 28.

32 32 are standards adapted to carry" the rocking shaft 33.

The table 18 is adapted to be'raised by the tread le 34, through the'connection-rod 35, p'ivotally attached below the table and lowered by the counterweight 42, connectedto'the. rocking shaft 20. The brush 25 is lowered into its operative. position on the (lt'lllHlZ-Slmultaneously with'the raising of the table 18 against the grounding-drum 7 by the 'depression of the treadle 34. 'Thisactuates the connecting-rod 3 5 and rocking shaft'20 to lift the table, and the motion of the rocking shaft" 20 is transmitted by lever 36, connecting-"rod 37, lever 38, rocking shaft 33, lever 39, and connecting-rod 40 to the brush 25, soas to depress same. the counterweight 42 returnsthe rocking shaft 20, and thus lifts the'brush 25 and lowers the table 18 out of contact with their respective grounding-drums and raisesthe needle.

41 is a right and left handed nut for adjusting the length of the connecting-rod'40.

43 43, Figs. 1 and 7, are brackets attached to the under side of the table 18 andcarrying adjustable spring-pressed buffers 43 43 in Fig. 1, adapted to strike against stops 44 44, fixed to the frames 2 and 3 when the table] is raised by the treadle in such manner as to soften or regulate the impact or application of the table and resilient surface when pressing the leather against the drum 7 when the table is raised by the treadle. The buffers 43 each comprise (see Fig. 7) a central spindle 45, adapted to slide in a hollow bolt 46 and pressed by a spring 47 against an inter- On releasing the treadle 34' nal shoulder or stop 48. The pressureof the spring-is adjustable by a screw-plug 49 screwing into the bolt 46. The hollow bolt 46 has an external thread by which it can be screwed into the bracket 43 to any desired extent to adjust its position with respect to the stop 44.

50 is a nut by which the bolt 46 can be locked in position when thus adjusted.

51, Figs. 1, 2,and 9, is a right and left handed spiral brush mounted on a spindle 51 at the table or feed side of the machine in suitable proximity to the drum 7, the spindle machine, and 55 and-56 are'fastand loose pulleys thereon. Fromthis shaft the-motion is transmittedto the shares-0r the-groundingdrum 7 by means of the pulleys 57 58 and belt pulleys'60 60 and tfelt'GO. "The spiralbrush 51" is likewise driven from theshaft '54 by a strap 61, running overthe extremity of the shaft 5,4 and over a" pulley 62 on the-"brushspindle 51; respectively, the diameter of the pulley 62 being such that I the brush 51 is driven at a suitable speed to e'ifect the smoothing of the leather.

63 63 are rails. providedat each side of the machine,on the delivery side thereof,and supportedat'their 0111191 ends on standards 64. These rails (see Fig. 8) are formedof "T-iron with the two flanges constituted by the'crosspiece of the T arranged vertically to serve'as upper and lower rails for the-rollers of the perchcarriage, which-'I=wi'll-now describe. This'carriage (see Figs. '2, 3,an'd'8)coin'prises two side bars 65' 65; eachprovi'ded with upper audzlower rollers 66 66 and 66* 66, adapted flanges of theT=rails 63. The side bars'65 65 are braced togetherby' tie-rods'67 68. On the tie-rod 681s inou'n ted'ajpivoti'n'gframe, upon "which is in turn mounted the'perc-lr-frame proper. I arms 69 69, bent downwardly at their-inner This pivotingframe comprises two ends and'carrying'at these ends'rol'lers 7O 70, adapted to run 11 p overcam-bracketshereinafterdesciibd. These arms-arei'braced together by :a' tie-rod 7 Land by means of 'a' hol- 'low sleeve 72, extending entirely across the perch-carriage, the sleeve72 being mounted upon the tie-rod'68' of this carriage, so as to "beffree' to turn thereon.

' The perch-frame-proper'ismounted on the tornn, respectively,'on'thetrpper and lower pivoting frame described in the=last para graph in such manner as to follow the pivoting motions thereof, while being nevertheless free to slide thereon to enable any desired portion of the leather to bebrought under the grounding-drums and to allow the skin to be drawn'through the machine' in any desired position with respect to said drums. The

perch-frame proper is composed of bent arms 73 73, having hooked forward ends to receive the perch-rod, these being braced about mid-' way of their length by a tie-rod 7 f and at their rear ends by a hollow tie rod or sleeve 75,

mounted on the tie-rod 71 of the pivoting upper end of a spring 77, the lower end of these springs being connected, respectively, to downward extensions 78 78 of the arms 69 69. These springs serve to return the pivoting frame and perch-frame proper to position. when they leave the cam-brackets, about to be described. These cam-brackets 79 79 are secured to the A-frames land 4, respectively,

' and lie inside and par'allel'to the rails 63 63 at the inner ends of same. They are formed at the side facing the perch-carriage with an" upwardly-inclined face and at th'e'side remote therefrom with a downwardly-inclined face,

1 as shown, so that when the perch-carriage is run forward to pass the forward endsof the arms 73 73 to the attendant at the other or feed side of the machine to enable him to place a fresh perch therein the rollers 70 70 in running over the cam-brackets first tilt the pivoting frame and with it the arms 73 73 up-- ward against the pull of the springs 77 to enable the arm 73, which is opposite the shaft 13 of the roller 12, to pass over the said shaft and carry the perch-rod under drum 7 and jhrush 51 to the attendant at the feed side of the machine, the table 18 being of course depressed and the brush 25 raised during this operation.

The operation of this machine is as follows:

The grounding-drums 7 and 12 and spiral brush 51 having been set in rotation in the direction opposed to that in which the leather is drawn through the machine, by shifting the driving-belt from the loose pulley 56 onto the fast pulley 55 the attendant at the delivery side of the machine runs the empty perchcarriage forward on the rails 63 to pass the arms 73 73 of the perch-frame proper through the machine to theattendant at the feed side to a convenient position to enable him to insert a perch-rod and skin. This attendant inserts a perch-rod with a skin attached thereto into the hooked ends of the arms 73. The perch-carriage is now pushed back or adjusted to bring the forward end of the skin into proper position at the delivery side of drum 12. The operator at the feed side then depresses the treadle, thus bringing the table 18 and brush 25 into working position with respect to their respective drums. The operator at the delivery side then draws the porchcarriage toward him against the action of the grounding-drum until the skin has been drawn entirely through the machine. The

' from each other. table adapted-to be operated in the same man- I may employ a non-tilting carrier.

treadle is now allowed to rise, and the counterweight returns the table and brush to their inoperative positions. The perch is removed from the hooked arms 73 and the empty carriage again run forward to enable the attendant at the feed side to insert a fresh perch and skin, and so on. The skin is attached to the perch-rod in the usual manner-that is to say, the perch-rod is provided with a cord running lengthwise and secured thereto through holes in the heads of the rod. The

end of the skin is passed between the cord and the perch-rod and then folded back on itself and around the rod, so as to prevent its slipping out from between the cord and the perch-rod.

Referring now to Fig. 9, 81 81 are knifeedged side guards secured to frames 82, mounted over the respective ends of the grounding-drums 83, these frames being car- 'ried by any suitable part of the machine- 'framing.

The knife-edged side guards 81 extend the entire length of the drum 83 and are secured to the frame 82 at each end by means of slots 84: and bolts 85 or in any other suitable manner which will allow their adjacent edges to be adjusted towardor away 86 is a rising and falling ner'as the table above described or in any other convenient way to hold the leather against the grounding-drum or to release it therefrom. This table 86, however, does not come in contact with the drum and has no resilient working face, as in the previous construction, but carries a tension-roller 87 at the feed side, which when the table 86 is in the raised position holds the leather in contact with the guard 81 and in resilient contact with the surface of the grounding-drum,

contact is due to the absence of any backing under the leather at the point of abrasion. 51 is a right and left handed. spiral brush arranged at the'feed side of the machine, as before, for smoothing out the leather and insuring its being presented with an even surface below the grounding-drum.

It will be understood that I may employ the arrangement described with reference to Fig. 9 either alone for operating on one face of the leather or in combination with a second grounding-drum and any other suitable resilient work-pressing surface foroperati'ng on the other face of the leather. It will also be understood that instead of employing a tilting perch-carrier for enabling the perchcarrier arms to be passed through the machine to an attendant at the feed side to per mit him to insert the perch-rod therein, as in the construction hereinbefore described,

case the perch-carrier can be run forward on the rails into suitable proximity to the machine to permit the attendant at the feed In this side to pass a perch rod with a skin attached thereto between the drum or drums and the work-pressing surfaceor surfacesor device ordevices codperating therewith where these are away from the drum or drums-and drop it into the arms of the perch-carrier." I- may also, instead of employingwork-pressing su rfaces constitu ted,respectively,by a-springtable, such as 18, and a brush, employ-two such tables 18 18, Fig. 1 1 or two such brushes 25 25, Fig. 10.

What I claim, and desire to secure by Letters'Patent, is

1. A machine for dressing leather and-the like, comprising the combination of a rotary grounding-drum having a surface of resilient material impregnated with emery, a resilient work-pressing surface cooperating therewith,

means for rotating said drum in anopposite like, comprising the combination of a first direction to the feed ofthe material, and

means for bringing said surface and saidv drum together and apartto press the material against-said drum or to release the same, substantially as described.

2. A machine for dressing leather and-the like, comprisingthe combination-of a rotary;

grounding-d rum having a surface of resilient material impregnated with emery. and a workpressing surface composed ofa comb-like series of spring-tongues, cooperating'with said drum, substantially as and for the purpose described.

3. A machine for dressing leather and the; like, comprisingthe combination of a rotarygroundingdrum having a surface of resilient material impregnated with emery, a--workpressing surface composed of a comb-like series of spring-tongues, cooperating with said drum,.means for rotating said drum in an opposite directionto the feed of the material, and means for bringing said surface and drum together and apart to press the material against said drum or to release same, substantially as and for the purpose described.

4. A machine for dressing leather and the like, comprising the combination of a rotary grounding-drum, a work-pressing surface composed of a comb-like series of spring tongues, cooperating with said drum, a stop for limiting the vibration of the free ends of said tongues toward said drum, and means for bringing said pressing-surface and drum together and apart, and means for rotating said drum in an opposite direction to the feed as and for the against said second drum, means for simultaneously bringingthe respectivedrums and surfaces together and apart, and means for rotating said drums in an opposite direction to the feed of the material, substantially as and for the purpose described.

6. A machine for dressing leather and the like, comprising the combination of a rotary grounding-drum having a surface of resilient material impregnated with emery, a resilient work-pressin g surface codperating therewith means for bringing said pressing-surface and drum together and apart, resilient buffer- ,stops for receiving and regulating the impact of said pressing-surface upon said drum and means for rotating said drum in an opposite .direction to the-feed of the material, substantially as and for the purposes described.

7.. A machine for dressing leather and the grounding-drum, awork-pressing surface composed of a comb-like series of springtongues, cooperating therewith to press one face of the material against said drum, a second rotary grounding-drum, aresilient brush icotiperatingtherewith to press the opposite face of the material against said'second drum,

a-treadle-operated set of'shafts, connecting .Qrods and levers for simultaneously moving said surface? and brush against their respective drums, means for returning said surface and brush away from said drums, and means for rotating said drums in an opposite direction-to the feed of the material, substantially as described.

8. A machine for dressing leather and the :like, comprising the combination of a rotary grounding-drum, a resilient. surface codperating therewith to press the material against said drum, means for bringing said surface and drum together and apart to press the material against the drum or release same,

means for rotating the said drum in the opposite direction to the feed of the material,

means for supporting the material and drawing it throughthe machine in contact with the grounding-drum,1and means for keeping it in tension during said travel, substantially as set forth.

' 9. A machine for dressingleather and the like, comprising the combination of a rotary grounding-drum,:a resilient surface cooperating therewithto press the material against said drum, means for bringing said surface and drum together and apart topress the material againstthe drum or release same, means for rotating said drum in an opposite direcating therewith to press the material against said drum, means for bringing said surface and drum together and apart, to press the material against the drum or to release it, means for rotating said drum in an opposite direction to the feed of the material, a rotary right and left handed spiral brush at the feed side of said pressin -surface, means for keeping the material in tension and means for supporting the material and drawing it through the machine in contact with the grounding-drum, substantially as and for the purposes described.

11. A machine for dressing leather and the like, comprising the combination of a. rotary grounding-drum, a resilient surface cooperating therewith to press the material thereagainst, means for bringing said surface and drum together and apart to press the material against the drum or to release it, means for rotating said drum in an opposite direction to the feed of the material,-means for supporting the material and traveling it through the machine, and for returning it mechanically through the machine to the feed side thereof.

12. In a machine for dressing leather and the 1ike,the combination with a rotary grounding-drum having a surface of resilient material impregnated with emery, of means for holding the work in resilient contact there with, and means for rotating said drum in an opposite direction to the feed of the material.

13. In a machine for dressing leather and the like,the combination with a rotary grounding-drum having a surface of resilient material impregnated with emery, of means for holding the Work in resilient contact therewith, means for rotating said drum in an opposite direction to the feed of the material, and means for giving said parts a relative movement to move them toward and from each other to press the material against said drum or to release the same.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

REGINALD EATON ELLIs, THOMAS LAING WHITEHEADr

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