US1798228A

US1798228A - Leather-working machine

Info

Publication number: US1798228A
Application number: US247877A
Authority: US
Inventors: Schettler Gustav Adolf
Original assignee: Turner Tanning Machinery Co
Current assignee: Turner Tanning Machinery Co
Priority date: 1927-01-27
Filing date: 1928-01-19
Publication date: 1931-03-31
Anticipated expiration: 1948-03-31
Also published as: AT112411B; DE515797C

Description

, 1931. G. A. SCHETTLER LEATHER WORKING MACHINE March 31 Filed Jan. 19, 1928 a Sheets-Sheet 1 mm 3- Q March 31; 1931. sc E 1,798,228

LEATHER WORKING MACHINE Filed Jan. 19, 1928 5 Sheets-Sheet 2 March 31, 1931. a. A. SCHETTLER LEATHER WORKING MACHINE 3 SBeetsSheet 5 Filed Jan; 19, 1928 INVENTQR Patented Mar. 31, 1931 UNITED STATES PATENT 'QFFICE GUSTAV ADOLF SCHETTLER, OF LEEDS, ENGLAND, ASSIGNOB TO THE TURNER TANNING MACHINERY COMPANY, OF PORTLAND, MAINE, A C(EKPOBATION .QF MAINE IiEATHER WQB-KII'TG IEACHINE Application filed January 19,1928, Serial No. 247,877, and in Great Britain- January '27, 1927.

This invention relates to machines for operating :upon hides, skins, leather and other similar :pieces of work and is illustrated as embodied in a machine for setting and rolling heavy leather. It is to be understood, however, that the invention and various important featuresthereof may have other uses and applications.

As heretofore commonly constructed, setting machines have been provided with a bed roll for presenting pieces of work in succession to a bladed cylinder and with a feed roll arranged for co-operation with the bed roll in feeding the work past the cylinder, the construction and arrangement being such that yielding of the :bed :roll with respect to the cylinder in accommodating thicker portions of the work resulted lessening-of the grip upon the work of itheco-operating feed and bed rollsso that at the very time the feedingshould be most efiecti've there was a distinct tendency to reduce the efficiency of'the feeding means. VV-hile several attempts have been made to overcome this condition .none of the proposed constructions .has gone into commercial use :to any substantial extent.

It is anobject-of the inventionto provide'an improved construction for leather working machines. which, while correcting the deficiency pointed out above, will at the same time retain :all of the best features of the commercial forms of setting machines. It is a further objectof the invention to provide a machine-which will be simple and durable in construction and highly efficient for the purposes intended.

To these ends, and .in accordance with an important feature of the invention, means provided cEor mounting the feed roll for bodily movement about a plurality of axes so that it may yield with respect to the bedroll to accommodate variations in thickness of the piece of work :being fed by the two rolls all :timesirrespective of the position of the bed roll with respect to the work treating member. Conveniently, the feed roll is mounted upon pivoted members which, yieldaway from the bed roll to permit the roll to adjust itself to work passing over the bed roll, and the latter is also connected to the said members for yieldingmovement so that both feed roll and bed roll may yield together relatively to the work treating member. Preferably too, and as illustrated, the bed roll isoperated by a toggle so arranged that when in straightened position thecenters of the toggleand of its lower pivotal mounting are in line with'thecenters of the bed roll and feed roll, thus providing a construction effective for relatively heavy rolling of the leather between the feed roll and the bed roll.

For securing a relatively broadsupport for the work while it is being operated upon, the illustrated machine is provided with a work support of improved construction :upon which a piece of work is supported in conjunction with the bed roll, the Work support being pivotally mounted u on the shaft'of the bed roll so as to move inc ependently of the bed roll while pressing the work yieldingly against,

the work treating member, which preferably and as shown, is a bladed cylinder. As shown, the work support is a presser attachment comprising a number of presser members individually yieldable and having contacting surfaces angularly arranged with respect to the direction of feed of the workso as :tO'ObVda-te any tendency to marking of "the Work, as might occur if the lines between the presser members were arranged at right angles to the longitudinal dimension of the presserattaohment. Conveniently means is provided for instantaneously adjusting the pressure of the work support with respect to the working cylinder, said means comprising also means for readily securing the work support in adjusted position. I

In setting operations u-pon certain kinds and classes of work, it is desirable to apply a liquid to the surface ofthe -piece'of work to condition it for the operation of the work treating means. Accordingly, means is provided for spraying liquid upon the piece of work passing over the bed roll, the spraying means being arranged to become operative when the bed roll moves into position to present the work to the work treating means and to become inoperative when the bed roll moves away from the work treating means toward a work receiving position. Conveniently the controlling means for the spraying means comprises a valve in a supply nipe arranged to be operated by a tappet mounted on a part which moves with the bed roll. As illus trated, this moving part is the upper toggle of the toggle mechanism provided for moving the bed roll between work receiving and work presenting positions.

In accordance with a further feature of the invention, the illustrated machine is also provided with treadle mechanism so constructed and arranged as to reduce to a minimum the transmission of vibration and movement of moving parts of the machine to the treadle, so that the work of the operator is facilitated by easier and smoother operation of the treadle. For this purpose the illustrated treadle is arranged to be returned to its initial position by a combined dash pot and spring mechanism which cushions what would otherwise be a considerable reaction upon the treadle of the parts which normally operate automatically to return moving parts of the machine to a position of rest.

These and other features of the invention and novel combinations of parts will now be described in detail in the specification and then pointed out more particularly in the appended claims.

In the drawings,

Fig. 1 is an end elevation of a setting and rolling machine illustrating a preferred em bodiment of the invention;

Fig. 2 is a front elevation of the machine shown in Fig. 1;

Fig. 8 is a section taken on line HIHI of Fig. 2;

Fig. 4 is a sectional plan of part of a presser pad attachment employed in the machine;

Fig. 5 is a cross-sectional elevation of the same;

Fig. 6 is a face view of part of the presser pad attachment.

Fig. 7 is a sectional side elevation of an improved form of gearing employed in the machine;

Fig. 8 is an end elevation of the improved form of gearing;

Fig. 9 is an end elevation of a spraying apparatus with which the machine is equipped, and

Fig. 10 shows details of the treadle mechanism for the illustrated machine.

Figs. 1, 2 and 3 are drawn to a smaller scale, and Figs. 4 to 8 to a larger scale than Fig. 9.

The illustrated setting and rolling machine comprises rigid side frames 1, 1, each of which has a pair of bell crank levers 2, fulcrumed thereon at 3. At one end each pair of levers (Fig. 2) has pivotally connected thereto one end of a beam the point of connection 5 being above the fulcrum of the bell crank levers. The levers 2 of each pair are disposed on opposite sides of the corresponding side frame and have the pivoted beams located between them in order to obtain rigidity sideways of the structure. Each of the beams l extends rearwardly and at its rear end is supported by means of a vertical rod 6 which passes through it and rests on the side frame 1. Conveniently, a compression or volute spring 7 is interposed between a selfaligning plate or washer S which presses upon the beam and lock nuts 9 on the upper end of vertical rod 6. Nuts 10 are provided on the rod 6 below the said beam to take the downward thrust of the sprin At its lower end the rod passes through a BOSS 11 on the side frame and is secured against upward novement by means of nuts 12, a selfadjusting washer 13 being interposed be tween the under side of the boss and the nuts. An opening 14: is provided in the side frame below the boss to accommodate the said nuts and washers, and it is at the bottom of this opening that the rod 6 contacts with and rests upon said frame 1. The rods 6 pass through clearance holes or slots (not shown) in the beams 1- and bosses 11 respectively so as to permit the beams to yield as will be described subsequently herein.

The aforesaid bell crank levers 2 are also spr' ig controlled from below and to this end are pivotally connected to eye bolts 15 1 and 2) extending downwards through lugs 16 on the corresponding side frames with compression springs 17 interposed between the upper side of said lugs and washers 18 backed by nuts 19 higher up on the bolts. The bolts 15 are passed through clearance holes or slots (not shown) in the lugs and are secured against upward movement by nuts 20 on the lower end thereof with self aligning washers 21 interposed between the nuts and the opposing faces of the lugs.

The pivoted beams l carry a hollow feed or presser roll 22, (Figs. 1, 2 and each trunnion 23 of which is mounted in a bearing located centrally on the corresponding beam 4, i. e. approximately midway between the opposite ends thereof. This roll co-operates with a hollow bed roll 24.- which in its working position is disposed below the feed roll 22. The bed roll has each trunnion 25 thereof mounted in hearings in swing arms 26 (Fig. 1) which are fulcrumed at 27 upon the aforesaic beams These swing arms are also arranged in pairs, there being one pair to each beam, the arms in each pair being disposed on opposite sides of the beam l to provide rigidity. The fulcrums of the swing arms are located adjacent to the front ends of liiil the beams, i. e. near the pivotal connections between the beams and the bell crank levers, so that when the bed roll 24 is in the working position, the arms are inclined downwards. The bed roll is swung to and from the Working position by means of

toggle links

28, 29, pivotally connected to the bed roll trunnions 25 atone end and extending downwards and pivotally connectedto the corresponding side frames at the other end upon bearings 30. The upper link 28 of each toggle is located between the corresponding pair of swing arms 26 and the lower link 29 is bifurcated to fit over the bearing 30 therefor in the lower part of the corresponding side frame. At this point adjustable shoes 31 are provided on opposite sides of the side frame 1 to receive the bifurcated end of the toggle link 29 so as to provide maximum distribution of the pressure when the toggle is straightened. A further feature of construction is that the toggle joint (Figs. 1 and 9) is iormed by a pin32 in one link working in a corresponding socket 33 in the other link,the pin and socket being in contact throughout the full length thereof. The arrangement is such that, when the toggles are straightened on the centers thereof by operation of the pitinan 33a, the centers of the feed or presser roll 22 and of the bed roll 24 and also the centers of the

toggles

28, 29 and of the bearing 30 are all located in one and the same straight line, i. e., a, b in Fig. 1. As shown, the pitman 33o holds the toggle link 29 with the center of the pin 32 fixedly in one position while the machine is operating on a piece of work. But the toggle link 28 may move to the right, in Figs. 1 and 9, to permit the bed roll to adjust itself yielding ly to the thickness of the work between it and the bladed cylinder 34. In Fig. '9, the spaced shoulders 23a an 29a, respectively on the

toggle links

28 and 29, indicate the-extent ofthe movement of the link 28 to permit the described adjusting movement of the bed roll 24.

For operating upon the work there'is provideda bladed working cylinder or tool 34 adapted-to perform setting and rolling operations on leather and with which the aforesaid rolls cooperate. The cylinder 34 is disposed at the rear of the machine, is. behind the bed roll 24, and at each end is mounted in a bearing (Fig. 1) formed as a slide'35 adapted for movement horizontally on a corresponding guide 36 on the side frame 1 so as to permit of adjustment of the cylinder in relation to the bed roll, or its removal or replacement. Conveniently each slide 35 is engaged by a screw 37 rotated, as shown, by worm gearing 38 from a common shaft 39 rotated in its turn through mitre gears (not shown) from connectedlto yielclable shell crank levers ;2 and providing a pivotal mounting-of the .bed mu 24a'boutthe center-of the pin 32, the

rolls

22, 24 while being capable of subjecting the work passed between them to heavy pressure, as in setting and rolling operations, are enabled also to yield together relatively to the WOI'king tool 34, ii? necessary, to accommodate variations in the thickness'of the material. Durthe simultaneous yielding of the

rolls

22, 24, away from the tool 34, the beams 4t11rn the .bell crank levers 2 about their fulcrums against the action of the compression springs 17 associated with said levers. Further, the feed roll 22 can, if necessary, yield relatively to the bed roll 24 by the beams 4 turning about their points of connection with the bell crank levers '2, against the action of the volute or compression springs on the rear ends of the beams. Another advantage of the constructicn shown resides in the fact that the movement of the bed roll 24 to and from its work ing "position requires a comparatively small amount of eil'ort, despite the heavy pressure between the

rolls

22, 24, owing to the fact that it is suspended from a point above it so that its weight is pr ctically removed from the toggles when in theiropen position.

Fulcrumed on the bed roll trunnions 25 011 the inside of the swing arms 26 are levers 42 which at their rear ends carry a work-support in the form of a presser attachment comprising a housing 43 (see particularly Figs. 3 to 6 and '9) provided with a longitudinal openizng 44 therein for the reception of a number of separate presser members 45 arranged side by side in contact with each other and each backed by a compressionwspring 46. Conveniently, as shown in Fig. 5, the longitudinal edges of the opening are undercut to term abutments 47 and the presser members 45 are formed with shoulders 48 for engagement with the abutment-s to limit the outward movement of the presser members under the action of the springs 46. The compression springs 46am individually adjustable to vary the pressure thereof in accordance with requirements, and to this end contact with washers or plates 49 associated with screws 50 (Figs. 4 and 5) threaded through a web or wall 51 in the .housing-and locked in position after adjustment by lock nuts 52. The outer ends of the levers 42 are pivoted at 53 (Figs. 1 to 3) to plates 54 which are slidable on rods 55 fixed in and depending from collars 56 freely mountedon eccentrics 57 (Fig. 3) on a horizontal shaft 58 carried at its opposite ends in bearings on the pivoted beams 4. Compression springs 59 are interposed between said plates 54 and other plates 60 fixed higher up on the rods 55 whereby the work support, comprising the housing 43 and the presser members 45 therein, is pressed yieldingly'towardthe bladed cylinder. The pressure exerted by these springs 59 may be varied by rotating the eccentric shaft 58 for which purpose the latter has a handle 61 (Fig. 1) fixed on one end thereof. A slotted segment is fixed on the pivoted beam adjacent to the handle, to which the latter may be clamped in adjusted position by nut and bolt or equivalent means 68. In order to obviate the formation of lines on the back of the leather the joints 64, Figs. l and 6, between the presser members l5 are formed at an angle to the direction of movement of the leather (Fig. As represented in Figs. 3 and 9, the work support bends the work 65, i. e. the leather, in one direction and the bed roll 24 bends the leather in the opposite direction, this arrangen'ient resulting in the bottom fibres of the leather being stretched to the same extent as the grain fibres. The work support is preferably angularly adjustable relativel to the workii'ig cylinder and for this purpose may be furnished with a trunnion 66 at each end wl lch fits freely in the corresponding lever 42. The housing is fixed at each end after adjustment by means of a screw 67, (Fig. inserted through a slot 68 in a woo integral with the housing 43 and into the corresponding lever 42. A transverse screw 69 (Figs. 4 and 6) each end of the housing prevents ennwise movement of the pads therein.

The feed roll 22 is positively and continuously driven by a chain 70 and

sprocket wheels

71, 72, (see 2) independently of the machine drive clutch mechanism, repre sented generally at 73, which latter controls the operation of the

toggles

28, 29 for moving the bed roll 24:. lhe bed roll is driven by mangle gears 7d, 75, (Figs. 1 and 2) from the feed roll 22 and the speed of these rolls may he changed for the various operations which the machine is to perform by substituting other chain wheels for those at 71, 72 for driving the feed roll.

To facilitate engagement between the mangle gears Ti. 75 on the feed roll and bed roll and to obviate breakage of the teeth when the bed roll brough from the open position into working position, the invention includes one of its features an improved construc tion of g aring. To this end, as illustrated in Figs. 7 and 8, the gear wheel 75 is capable of a limited turning movement upon a. sleeve or bushing 76 keyed to the trunnion 23 of the feed roller 00 ii driving connection between the sleeve 76 and wheel 7 5 is provided by dog

clutch teeth

77 and 78 respectively on parts 76 and which provide lost motion between the two in a rotary direction. Th at is to say, recesses 79 between the teeth 78- are wider than the teeth 77. By means of one or more springs i wheel 75 yieldingly held in a normal position on the sleeve or bushing 7 6 from which position it is capable of moving slightly in either direction before transmitting the drive in positive manner to the bushing. For example, springs 80 on a rod 81 fixed in lugs 82 on the sleeve 7 6 act on opposite sides of a lug 83 on the gear wheel 7.). The rod 81 passes through a clearance hole in the lug 83 to allow for yielding movement of the wheel in either direction. In the machine shown in Figs. 1 and 2, only the gear wheel 75 is constructed as aforesaid, it being obvious, however, that both

wheels

74 and 75 may be constructed in the manner described in connection with wheel 75. lVhen the mangle gears engage, upon the bed roll being moved to operative position, the toothed wheel 7 5 can yield if necessary owing to the limited backlash provided, and upon transmission of drive from one to the other, the connecting

clutch teeth

77, 78 between the wheel 75 and the sleeve 76 provide a positive drive as soon as the lost motion or backlash has been absorbed. To facilitate easy meshing of the gear teeth, each

wheel

74, 75 may comprise a plurality of sections, e. g., as illustrated in 7, arranged side by side with their teeth staggered, as shown in Fig. 8, the sections being clutched together by interchanging dog clutch teeth 84:, 85, or otherwise positively connected. When each wheel is designed to yield, the sections thereof are held in position on the sleeve 7 6 by a flange at one end of the sleeve and a collar 86 fixed on the other end. It will be understood that in the case of a wheel, e. g., 74, which does not yield the sections thereof may be similarly mounted on a sleeve without the spring arrangement.

The

toggles

28, 29 aforesaid may be actuated from a crank shaft 87 (Figs. 1 and 2) driven by suitable mechanism which includes the clutch mechanism 73 and means of known form (and therefore not requiring detailed description) for automatically throwing the clutch out of action at each half revolution of the crank shaft, thus bringing the machine to rest with the bed roll in the operative and inoperative positions alternately. As represented generally in Figs. 1 and 2, such automatic means include a half cycle cam 88 on a gear 89 and a co-operating lever 90 connected by a spring controlled link 91 with a clutch fork 92 and associated with a starting treadle 93. For a more detailed description of the mechanism for moving the bed roll 24 from work receiving to work presenting position and in the reverse direction and for maintaining it in work receiving position and subsequently in work presenting position during the operation of the bladed tool, reference may be had to United States Letters Patent No. 873,790, granted Dec. 17, 1907, upon application of John Rood and Franklin J. Perkins.

For operating the clutch to set the machine in motion, the invention provides an improved treadle arrangement wherein a starting treadle 93 is freely mounted on its shaft 94 so that after depression for starting purposes it can returntonormal position independently of the. shaft. As shown, the treadle93, when depressed, turns theshatt 94 by contact with an, arm 94a fast with the shaft. Thetreadle isfree toturn in. an upward. direction on and independently of the shaft and. has combined with it a spring 94?) carried by a rod 940 which. works in a stationary cylindrical housing 95 and is fitted with a piston 96 for air control which acts against a projection 97 on the treadle to lift the latter. The outward movement of the spring and piston are limited by adjusting nuts 97c on the rod 940 which engage one end ofthe housing on the outside. This arrangement prevents jar on the treadle when the automatic means come into operation to throw the clutch out of action. The effect of the spring and air cylinder device 96 is that the treadle is raised to normal position by a gentle motion immediately it is released by the operator.

The illustrated machine is also provided with a spraying apparatus situated so as to act upon the skin at the desired points, As illustrated in Fig. 9, the spraying apparatus comprises a perforated pipe 98 disposed in the space between the working cylinder 34 and the feed and bed rolls 22, 24, and connected by a pipe system 99 with a pump or other means (not shown) whereby oil, water or suitable liquid can be sprayed in the de sired direction, e. g. downwards on to the leather passing between the bed ro ller and the cylinder. The pipe system includes a piston or plunger valve 100whichis normally closed by spring action. The valve is disposed opposite one of the toggle links 28 which latter is fitted with an ac jnstable tappet 101 for action on a valve piston or plunger 102. Thus the machine, when carrying out the combined operations of dampening, setting the grain, and rolling, operates in the following manner. The piece of work, which may be a hide,.skin or piece of leather, having been placed over the bed roll 24 is carried forward into contact with the bladed cylinder 34 when the treadle is depressed, and this motion by reason of the action of the tappet, 101 opens the valve 100 and puts the spraying apparatus into action. .The rotary motion of thebladed cylinder distributes the liquid evenly over the surface of the piece of work, the said liquid acting as a lubricant between the setting tool and the grain of the piece of work whereby a very fine and close grain is olstained. After any given portion of the work has been thus dampened and set, it passes on between the presser and bed rolls 22, 24 and is thereby subjected to heavy pressure which constitutes what is known as the first rolling operation. It will therefore be seen thatduring one passage through the machine the work may be subjectedto three diflerent operations which are performed in a continuous. manner. In. other words, the method comprising the said: steps of dampen,- ing, setting and rolling can, by the machine herein-described, be carriedout in. one opera.-. tion or at one handling of the work. The surplus oil or other liquid may be collected in a suitable receptacle forrepee-ted use.

For the operation of striking out (i. e. nemoving moisture), thefecd and presscr 15011122 is covered with a felt sleeve for absorbing moisture from the pieces of WOIk while the tool or cylinder 34 is operatingon the. work against the bed; roll 24. For sammying, (i. e. dampening), both the bed roll 24 and resser roll: 22 are covered with loose fitting felt sleeves, the work cylindcr being spaced away from the bed roll 24 in. a position to press the workagainst the presscr members 45. In the latter case the action 0t theworking cylinder: 34 is confined to spreading theskin in coop.- eration with thepresser members 45. For set;- ting operations, thepresscr roll 22-, is either a smooth metal roll covered with a non-comm sive metal suchasbrassorcopper, or it is covered with a hard rubbervulcanites; and. the bed roller is rubber covered and has a yielding surface.

In using the machine, a piece. of Work placed over the bed; r011 24 and the presser members 45 while these occupy the opener inoperative position represented by dot and dash lines in Fig. 3., approximately oeehalfi of the piece of work being introduced at any time. The machine then started; and the toggles are actuated to. move the be 0 1. So that the work is carried into contact with the bladed cylinder 34 and also with the. feed and presser roll 22-, whereupon the skin is drawn past the working cylinder in the ro ation of the two

rolls

22, 24. After one portion of a piece of work has been operated 0n, the treadle is operated to cause the bed roll 24 to move to open or work receiving position, so that the untreated portion of the Work may be thrown over bed r011 24 and the work supporting presser members 45. A second-depression of the treadle causesthe bed roll and presser members to, move toward the bladed cylinder 34 to press the Work thereagainst, the feed ro1122 being engaged with the work first to insure clamping thereof on the bed r011 before the cylinder starts. operating on the work.

Having thu e ri ed my ent on, What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for operating upon hides, skins, leather, and other similar pieces of work, means for treating a piece of work, a support for presenting the piece of work to the work treating means, said support being movably mounted, means for yieldingly pressing the support toward the work treating means, and a feed roll for co-operation with the support in feeding the work mounted to move about a plurality of axes to permit movement of the feed roll with respect to the support and yielding of both feed roll and support with respect to the work treating means.

2. In a machine for operating upon hides, skins, leather, and other similar pieces of work, a work treating member, a support for presenting the piece of work to thework treating member, said support being movably mounted, means for yieldingly pressing the support toward the work treating member, a feed roll for co-operation with the support in feeding the work, and a mounting for the feed roll pivoted for movement away from the support to permit adjustment of the feed roll with respect to the support, said mounting being movable also in another direction to permit movement of the feed roll together with the support in directions toward and from the work treating member.

3. In a machine for operating upon hides, skins, leather, and other similar pieces of work, a rotary cylinder for treating a piece of work, a bed roll for presenting the piece of work to the rotary cylinder, said bed roll being movably mounted, means for yieldingly pressing the bed roll toward the rotary cylinder, and a feed roll for co-operation with the bed roll in feeding the work mounted to move about a plurality of axes to permit movement of the feed roll with respect to the bed roll and yielding of both rolls with respect to the rotary cylinder.

4. In a machine for operating upon hides, skins, leather, and other similar pieces of work, a rotary cylinder for treating a piece of work, a bed roll for presenting the piece of work to the treating cylinder, means for pressing the bed roll yieldingly toward the work treating cylinder, a feed roll arranged for cooperation with the bed roll in feeding the work past the work treating cylinder, and members for supporting the feed roll arranged to yield in two directions so that the feed roll may be self adjusting with respect to the bed roll and also self adjusting together with the bed roll with respect to the work treating cylinder.

5. In a machine for operating upon hides, skins, leather, and other similar pieces of work, a rotary cylinder for treating a piece of work, a bed roll for supporting and backing a piece of work during the operation of the work treating cylinder, a feed roll for co-op oration with the bed roll in feeding the work past the work treating cylinder, and means for supporting the feed roll and the bed roll each for movement about a plurality of axes so that the feed roll may yield relatively to the bed roll and both the feed roll and bed roll yield together relatively to the work treating cylinder, and so the bed roll may move bodily between work receiving and work presenting positions.

6. In a machine for operating upon hides. skins, leather and other similar pieces of work, a rotary cylinder for treating the work, a bed roll for presenting a piece of work to the cylinder, a feed roll for co-operation with the bed roll in feeding the work, means for supporting the feed roll and the bed roll, and a toggle for moving the bed roll between work receiving and work presenting positions with respect to the work treating cylinder, the construction and arrangement being such that the centers of the toggle and of its pivotal mountings are in line with the centers of the feed and bed rolls in the work presenting position of the bed roll.

'7. In a machine for operating upon hides, skins, leather and other similar pieces of work, a work treating cylinder, a bed roll for presenting a piece of work to the cylinder, a feed roll for co-operation with the bed'roll in feeding the work past the work treating cylinder, and means for mounting the feed roll for pivotal movement about an axis above the bed roll so that it may adjust itself upwardly and downwardly with respect to the bed roll and for pivotal movement about another axis to move with the bed roll in adjusting movements of the latter with respect to the work treating cylinder.

8. In a machine for operating upon hides, skins, leather and other similar pieces of work, a work treating cylinder, a bed roll for presenting a piece of work to the cylinder, a feed roll for co-operation with the bed roll in feeding the work past the work treating cylinder, pivoted members for supporting the feed roll, and swing arms for pivotally connecting the bed roll to the pivoted members, said pivoted members being mounted to yield about one axis during relative movement between the feed roll and the bed roll and also to yield about a second axis during combined movement of the feed roll and bed roll with respect to the work treating cylinder.

9. In a machine for operating upon hides. skins, leather and other similar pieces of work, a work treating cylinder, a bed roll for presenting a piece of work to the cylinder, a feed roll for co-operation with the bed roll in feeding the work past the work treating cylinder, pivoted members for supporting the feed roll, pivoted spring controlled members for yieldingly supporting the pivoted members, and swing arms for connecting the bed roll to the pivoted members, the pivoted mem bers yielding about their pivotal connection with the spring-controlled members during adjusting movement between the feed roll and the bed roll, said pivoted members being movable also about the pivotal mounting of the spring-controlled pivoted members during movement of the bed roll and feed roll relative to the work treating cylinder.

10. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll movable between work receiving and work presenting positions for presentinga piece of work to the bladed member, a feed roll for co-operation with the bed roll infeeding the work past the bladed member, pivoted members for sup porting the feed roll, pivoted bell crank members for supporting the first-mentioned pivoted members, and arms for pivotally connecting the bed roll to the first-mentioned pivoted members, said first-mentioned pivoted' members being movable about their pivotal connections with the bell crank levers to permit the feed roll to adjust itself with respect to. the bed roll, said first-mentioned pivoted members also movable about the pivots of the bell crank levers to permit movement of the feed roll and bed roll in directions toward' and from the bladed member.

11, In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting apiece of work to the bladed memher, a feed roll for cooperation with the bed roll in feeding the work, means for moving the bed roll between work receiving and work presenting positions with respect to the bladed member, said bed roll being pivotally mounted to yield with respect to the bladed member, and means for mounting the feed roll for bodily movement about two independent axes so that the feed roll may adjust itself about one axis to accommodate variations in the thickness of the work between the feed roll and bed roll and also about another axis to accompany the bed roll in its movements of adjustment to accommodate varia tions in the thiclmess of the work between the bed roll and the bladed member.

12. In a machine for operating upon hides, skins, leather and ot'l er similar pieces of work, a bladed member, a bed roll for presenting a piece of work to the bladed member, a feed roll for co-operation with the bed roll in feeding the work, pivoted members forsupporting the feed roll for bodily movement about two. independent axes, the feed roll being movable about one axis so as to accommodate variations in thickness of work between the feed roll and the bed roll and movable about a second axis to move with the bed roll as the lattermoves toward or from the bladed member to accommodate variations in the thickness of the work, means for coImect-ing, the bed roll to the pivoted members which support the feed roll, and means for moving the bed roll between work receiving and work presenting positions with respect to the bladed member.

13. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting a piece of work to the bladed member, a

feed roll for co-operation with the bed roll in feeding the work, members pivoted above the level of the bed roll for supporting the feed roll for bodily movement about two in dependent axes, the feed roll being movable about one axis so as to accommodate variations in thickness of work between the feed roll and the bed roll and movable about a second axis to move with the bed roll as the latter moves toward or from the bladed member to accommodate variations in the thickness of the work, means for supporting the bed roll from the pivoted members when in its work receiving'position, and means for moving the boo roll between work receiving and work presenting positions with respect to the bladed member.

14. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed cylinder for operating on the work, a bed roll for co-operation with the cylinder to support the work against the thrust of the cylinder, a feed roll for co-o-poration with the bed roll in feeding the work past the cylinder, a pair of beams for supporting the feed roll, said beams being mounted for movement about two parallel axes, and swing arms for connecting the bed roll to the beams so that the bed roll and the feed roll may move together with the beams about one axis when the bed roll accommodates itself with respect to the work between it and the cylinder, the feed roll moving with the beams about another to yield with respect to the bed roll to accommodate variations in the. thickness of the work passing between the two rolls.

15. In a machine of the character described, means for operating on a piece of work, a bladed cylinder for operating upon the work, a bee roll for present-in a piece of work to the bladed cylinder, means for yieldingly pressiI-ig" the bed roll toward the bladed cylinder, a feed roll for co-operation with the bed roll in feeding: the work past the bladed cylinder, a pair of bee for supporting the feed roll, means for s1ippciting the beams for pivotal movement about two parallel axes, and means for connecting the bed roll with the beams, the construction and arrangement providing for movement of the feed roll with respect to the bed roll and also movement of the two rolls with respect to the bladed cylinder.

16. In a machine for operatingupon hides, skins, leather and other similar pieces of work, a work treating cylinder, a bed roll for presenting a piece of work to the work treating cylinder. a feed roll for co-operation with the bed roll in feeding the work past the work treating cylinder, and means for mounting the feed roll for pivotal movement relative to the bed roll and aiso for move ment with the bed roll in directions toward and from the work treating cylinder.

17. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting a piece of work to the bladed memfi'aljbcl, a teed roll for co-operation with the bed roll in feeding the work, pivoted members tor supporting the feed roll for bodily mov ment about two independent axes, the feed roll being movable about one axis so as to accommodate variations in thickness of work between the feed roll and the bed roll and movable about a second axis to move with the bed roll as the latter moves toward or from the bladed member to accommodate vriations in the thickness of the work, sup porting arms for connecting the bed roll pivotally with the pivoted members which sup port the feed roll. and a toggle mechanism for moving the bed roll between work receiving and work presenting positions with respect to the bladed member.

18. In a machine for operating upon hides, skins, leather and other similar pieces of work, a work treating; cylinder, :1 bed roll for presenting the work to the work treating cylinder, means for feeding the work pro gressively past the cylinder, a work support for co-operation with the bed roll in supporting the work for the operation of the work treating cylinder, means for pressing the work support independently of the bed roll in a direct-ion toward the work treating cylinder, means for causing relative movement between the bed roll and the work supporting member on one side and the work treating cylinder on the other so that pieces of work may be readily introduced and subsequently acted upon, and means manually operable while the machine is in operation for adjusting the pressure of the work support with respect to the cylinder.

19. In a machine for o ierating upon hides, skins, leather and other similar pieces of work, a rotary cylinder for treating the work, a bed roll for presenting the work to the rotary cylinder, means for feeding the work, a work supportt'or cooperation with the bed roll in presenting the work to the work treating cylinder, means for connecting the work support to the bed roll to move therewith, means for yieldingly pressing the bed roll in a direction toward the work treating cylinder, means independent of the last-mentioned means for yieldingly pressing the work support in a direction toward the cyinder, so that both the bed roll and the work support may yield independently to accommodate themselves to variations in the thickness of the work passing between them and the work treating cylinder, and means manually operable while the machine is in operation for adjusting instantaneously the pressure of the work support with respect to the cylinder.

20. In. a machine for operating upon hides,

skins, leather and other similar pieces of work, a work treating cylinder, :1 bed roll for supporting a piece of work against the thrust of the cylinder, means for mounting the bed roll so that it may move yieldingly away from the cylinder, a feed roll for cooperation with the bed roll in feeding the work, a work support for co-operation with the bed roll in pressing the work against the cylinder and mounted to move with the bed roll, and piv oted members for supporting the feed roll for bodily movement with respect to the bed roll and also for bodily movement with the bed roll and the work support in movements of the latter toward and from the work treat ing cylinder in accommodating variations in the thickness of the work passing between them and the cylinder.

21. In a machine for operating upon hides, skins, leather and similar pieces of work, a bladed member, a bed roll for supporting a piece of work against the thrust of the blade-d member, means for mounting the bed roll so that it may move yieldingly away from the bladed member, a feed roll for co-operation with the bed roll in feeding the work, an auxiliary work supporting member for co-operating with the bed roll in pressing the work against the bladed member and mounted to move with the bed roll, pivoted members for supporting the feed roll for bodily movement about two axes, about one axis for permitting yielding of the feed roll with respect to the bed roll, and about the other axis to permit movement of the feed roll with the bed roll and auxiliary work support as the latter two adjust themselves with respect to the bladed member, means connected to the pivoted members for yieldingly pressing the bed roll toward the bladed member, and other means for yieldingly pressing the work support in a direction toward the bladed member.

22. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting a piece of work to the bladed member, a feed roll for co-operation with the bed roll in feeding the work, a work support for cooperation with the bed roll in presenting the work to the bladed member, means for supporting the work support upon the bed roll so that it may move with the latter, pivoted members for supporting the feed roll, said pivoted members being pivotally supported for movement about two independent axes, about one axis for bodily movement of the feed roll with respect to the bed roll and about the other axis for movement of the feedroll with the bed roll and work support during movements of the latter to accommodate variations in thickness of the work passing over the bladed member, and toggle mechanism for moving the bed roll and the work support between work receiving and work presenting positions with respect to the bladed member.

23. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting a piece of work to the bladed member, a feed roll for co-operation with the bed roll in feeding the Work, pivoted members for supporting the feed roll, pivoted bell crank levers for pivotally mounting the firstmentioned pivoted members at one end of each of said pivoted members, and means for yieldingly operating upon the other ends of the pivoted members for yieldingly resisting a separating movement between the feed roll and the bed roll, spring means for yieldingly resisting movement of the bell crank levers in one direction, arms for connecting the bed roll to the pivoted members, and means for moving the bed roll between work receiving and work presenting positions with respect to the bladed member and the feed roll.

24. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting the work to the bladed member, a feed roll for co-operation with the bed roll in feeding the work past the bladed member, and a work support for co-operation with the bed roll in presenting the work to the bladed member, said work support comprising a plurality of yieldingly mounted presser members having surfaces contacting with each other in sideby-side relationship, said presser members being so constructed that arranged with respect to each other that the contacting surfaces extend at an angle other than a right angle to the direction of feed of the work.

25. In a machine for operating upon hides, skins, leather and other similar pieces of work, a work treating cylinder, a bed roll for presenting a piece of work to the cylinder, a feed roll for co-operation with the bed roll in feeding the work, a work support for cooperation with the bed roll in supporting the work for the operation of the cylinder, means for pivoting the work support to move with the bed roll, means for pressing the work support yieldingly toward the cylinder, means for moving the bed roll and the work support between work receiving and work presenting positions with respect to the cylinder, and manually operable means for instantaneously adjusting the pressure of the work support with respect to the cylinder while the machine is in operation.

26. In a machine for operating upon hides, skins, leather and other similar pieces of Work, a bladed member, a bed roll for presenting a piece of work to the bladed member, a feed roll for co-operation with the bed roll in feeding the work, an auxiliary work support for co-operation with the bed roll in presenting the work to the bladed member, means rfor 'connecting :the work support directly to the'bed roll ,to move therewith, means for yieldingly pressing the 'bedzrollin a direction to-wardthe bladedmember, meansfor nyieldinglypressing the work support 'in a direction toward the bladed member sothat -bothsthebed'roll and the auxiliary-support may yield it!) accommodate themselves to-va- .riations in thethickness of the work passing gbetweenthem and the bladed member, anda .manually operable eccentric for adjusting instantaneously thepressure'o-f the work'su-p- ;port with respect to the bladed member.

527,. Ina-machine for operatingupon hides, skins, leather and other similar pieces of .work, a rotary member fortreatingthework, aibed' rollfor presenting the work to the ro- -tary member, a feed roll for'co-opera'tion with the bed'roll in effecting rollingof the-work and: in feeding the workpast the "rotary-memhem-means for moving the bBdTI'Ol]. between work receiving and .work presenting positions with respect to the rotary member, means located in the angle formed by the :feed roll, the bedroll and rtheworktreating rmember, for-spraying liquid upon the piece 1 of work pass'ingbetweenv the bedroll; and the work" treating member, and means controlled by -movements of the bed yroll between "work ireceiving and work presenting positions,;for zcausing :operation :of the spraying means whilethe bed roll is in work-presenting position;and for rendering thesprayingmeans inoperative while theZbed roll is in workre- 'ceiving position.

28. In a machine ifonoperating upon hides, skins, 'leathe-r gand =other similar pieces of 2W.0I'\l ,ja ,bladedmember, a bedroll for presenting a piece of'workz to the bladed member,

a feed roll for co-operationwiththebedroll in feeding the work, past the bladed member, .means for moving'the bed-roll between .work receiving andwork presenting positions with v:respect. to the bladed; meniher,::aperforated ;.pipe for spraying liquid upon the piece of workg passing over the bedroll, a valve in'the pipe, and -means comprising an adjustable tappet connected -,tomove With the bed roll for cont-rolling the valve so that liquid is :sprayed uponithe workwhile the bed'roll is :in work .presenting position, and so that spraying ofthe liquid ceaseswhile the-bed roll! is in work receiving position.

29, In-a machine for operating upon hides, skins, leather and other similar pieces of vwork, abladed member,'a bed roll for presenting a piece of'work to the bladed member, a feed roll for-co-operation with-the bed roll in feeding the work past the bladed member, means for moving the bed roll between Work receiving and work presenting positions with respect to the bladed member, a perforated pipe for spraying liquid upon the work passing over the bed roll, a valve in the pipe, and

a tappet carried by the bed roll moving means i and arranged to cause the valve to be opened and closed automatically in accordance with the movements of the bed roll between work receiving and presenting positions.

30. In a machine for operating upon hides, skins, leather and other similar pieces of work, a bladed member, a bed roll for presenting a piece of work to the bladed member, a feed roll for co-operation with the bed roll in feeding the work past the bladed member, means for moving the bed roll betwen work receiving and work presenting positions with respect to the bladed member, a perforated pipe for spraying liquid upon work passing over the bed roll, a valve in the pipe, a piston extending exteriorly of the valve, and an adjustable tappet connected to move with the bed roll for controlling the piston so that upon movement of the bedroll to work presenting position the valve is operated to cause spraying of the liquid upon the work, the piston moving to closing position upon movement of the bed roll away from work presenting position.

31. In a machine for operating upon hides, skins, leather and other similar pieces of worz, a. bladed member, a work support for presenting a piece of work to the bladed member, power means for moving the work support to present the work to the bladed member, a clutch for controlling the power means, a shaft and a starting treadle for controlling the clutch, said treadle being freely mounted on the shaft so that after depression thereof for throwing in the clutch it can be returned to its initial position of rest independently of the return movement of the clutch parts, and means for returning the treadle to initial position upon its being released by the operator.

32. In a machine for operating upon hides, skins, leather and other similar pieces of work, a work treating cylinder, a work support for presenting a piece of work to the cylinder, power means for moving the work support to present the work to the cylinder, a clutch for controlling the power means, means for automatically throwing the clutch out of action at each half cycle, a shaft, a starting treadle for operating the shaft to control the clutch, said treadle being freely mounted on the shaft, and yielding means operative to return the treadle to its initial position of rest irrespective of the movements of the shaft and clutch parts.

In testimony whereof I have signed my name to this specification.

GUSTAV ADOLF SCHETTLER.