US1147819A - Leather-buffing machine. - Google Patents

Description

J. R. SCOTT.

LEATHER BUFHNG MACHINE.

APPLICATION FILED JULY 3. |909= 1 ,147,819, Patented July 27, 1915.

3 SHEETS-SHEET I.

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l. R. SCOTT.

LEATHER BUFFING MACHINE.

APPLICATION FILED JULY 8. 1909.

Patented July 27, 1915.

3 SHEETS-SHEET 2.

J. R. SCOTT.

LEATHER BUFFING MACHINE.

APPLICATION FILED JULY 8. I909.

Patented July 27, 1915.

3 SHEETS-SHEET 3 UN ITED STATES PATENT OFFICE.

JACOB B. SCOTT, OF BOSTON, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHINERY COMPANY, OF PA'I'EBSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

LEATHEB-BUFFING MACHINE.

Specification of Letters Patent.

Patented July 27, 1915.

T 0 all whom it may concern:

Be it known that I, Jacon R. Soon, a citizen of the United States, residlng at Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Leather-Bulfing Machines, of which the following description, 1n connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to leather builing machines and is herein shown embodied in a machine primarily intended for use in conncction with the manufacture of boots and shoes to bufl articles of leather, such, for example, as soles, box toe pieces, counter stifl'eners, and the like.

Heretofore in leather bufiing machines, it has been proposed to employ a bailing tool arranged to be given a compound movement so that different portions of the acting surface of the tool travel in intersecting paths in the operation of the machine. By giving the bufiing tool a compound movement a very smooth surface is imparted to the work and liability of dust collecting upon the tool and glazing over the abrasive surface of the tool is lessened, thus prolonging the life of such surface. In so far as I am aware, however, in the previous machines of this type it has been necessary for the operator to manually hold the work in operative engagement with the bufling tool and to move the work along the surface of the tool to present different portions of the work to its abrasive action, This method of procedure has rendered necessary the expenditure of considerable energy upon the part of the operator and the output of the machines has been low, as compared with buffing machines in which the work is automatically fed to the buifing tool.

An object of the present invention is to provide a leather boiling machine of the above type which shall be free from the objections mentioned.

A further object of the invention is to improve generally the construction of leather butting machines.

\Vith these and other objects in view a feature of the present invention consists in the provision in a leather butling machine having a buffing tool arranged to be given a compound movement of means for controlling the position of the work as it passes across the face of the boiling tool having provision for preventing displacement or movement of the work in directions other than that in which it is fed to the tool. In accordance with a convenient way of carrying out this feature of the invention there is provided means for holding the work in engagement with the tool as it passes over its surface, which is constructed to prevent displacement of the work away from its proper path of movement relative to the tool, such, for example, as might be caused by the influence of the moving tool upon the work. Preferably yielding means are employed to hold the work in engagement with the buffing tool, as by the provision of such means the surface of the article to be boiled is brought into proper operative relation to the butting tool and is maintained in such relation during the operation of the tool so that the desired amount of material is removed from said surface regardless of variations in the thickness of the article or irregularities in its surface. Preferably also the means for yieldingly holding the work in contact with the buffing toolcomprises a body of yielding material such as rubber which is adapted to yield to the pressure of the Work and allow the article to be bent or distorted if necessary as it is pressed into the material so as to bring the surface to he landed into proper position relative to the bufling tool. By the provision of a body of yielding elastic material arranged to press the work against the bufling tool any liability of displacement or movement of the work in a direction other than that in which it is fed across the surface of the tool is obviated as the work sinks into the yielding material, so as to prevent objectionable displacement. Preferably with the means for pressing the Work against the bufiing tool there is employed a rigid gage member arranged to coiiperate with the work pressing means to hold the work in proper position to be acted upon by the buffing tool. This gage member is arranged for engagement with the side of the work that is to be boiled, and the work pressing means is adapted to press the Work into engagement with the gage member as well as the buffing tool. \Vith this arrangement the gage member serves as a former and determines the position of the surface of the article that is to be bufl'ed, maintaining this surface in proper position relative to the bufling tool so that the proper amount of material is removed therefrom regardless of variations in the thickness of the article. The employment of a gage member in this connection is further advantageous as with its use the work is pressed between the work pressing means and said gage member so that displacement or movement of the work in directions other than that in wh1ch 1t is fed across the face of the tool is effective] prevented. I

In the embodiment of the invention hereafter described the bufling tool comprises a rotary bufiing roll arranged to be longitudinally reciprocated as it operates so that differentportions of the acting surface of the tool travel in intersecting paths. The work is held in operative relation to the bufling roll by a presser roller which is also employed to feed the work across the face of the bufiing roll. For the reasons previously given a yielding presser roller 1s preferably employed and to this'end said roller is formed with a body of yielding elastic material such as rubber. gage member is arranged to cotiperate with the presser roller to position the work in proper operative relation to the buliing roll and this {member is preferably arranged to act as a work support to support the articles to be buffed in proper position to enable them to be fed between the presser roller and the bufiing roll. Preferably the gage member comprises a work supporting plate which is mounted for adjustment in a vertical direction toward and from the presser roller and also along the line of feed of the work in order that the plate may be positioned 'to insure that the work will be subjected to the proper degree of pressure as it passes between the presser roller and said plate.

A further feature of the present invention consists in the provision of a brush arranged 'to clean the bufied surface of the work and means for holding the work in engagement with the brush so that liability of the work becoming displaced out of cflective relation to said brush is avoided. Preferably a rotary brush is employed which is arranged to rotate in a direction tending to assist the feed of the work, and a roll 'mounted to'rotate freely is arranged to hold the work in contact therewith.

In acordancc with a further feature of the invention there is provided a guard arranged between the bufiing roll and the brush. With this arrangement particles of matter removed from the work by the buffing tool are prevented from being thrown upon the brush, and thereafter distributed by the brush over the work.

Other features of the invention will be hereinafter described in the specification and pointed out in the claims.

In the drawings,-Figure 1 is a view in side elevation of a machine embodying the present invention; Fig. 2 is a view in front elevation of the machine shown in Fig. 1; Fig. 3 is a sectional view of the upper part of the machine; Fig. 4 is a perspective view showing the construction of the 11 per portion of the machine.

Re erring to the drawings, 2 designates the bufling roll which may be of any suitable construction. The bufling roll shown comprises a suitable body portion having a removable covering of abrasive material and being secured in any suitable way upon a horizontal shaft 4: which is mounted in bearings carried by the side plates 6. The shaft 4 is arranged to be rotated and longitudinally reci rocated by means to be hereinafter descri ed. W'ith this movement of the shaft 4 the bufl'mg roll is given a compound ahrading movement such that different portions of its acting surface travel in intersecting paths, the result being that a. very smooth surface is imparted to the work acted upon by the tool. The side plates 6 rest upon a base plate 8 and are secured thereto by bolts 10, the said base plate 8 being secured upon the top portion of a casting 12 comprising the base of the frame of the machine.

The resser roller 14 is arranged above the bu g roll and comprises a sleeve 16 of yielding elastic material, such as rubber, mounted upon a metal core 18 secured upon a horizontal shaft 20 mounted in tubular sleeves 22 which are carried by blocks 2a slidably mounted in vertical guideways 26 formed in the side plates 6. The blocks 24 are yieldingly pressed toward the buffing roll by means of springs 28 confined between the blocks and the lower ends of adjusting screws 30 threaded in cap pieces 32 extending across the top portions of the guideways 26 and secured to the side plates 6. The movement of the presser roller toward the butting roll is limited by rods 34, extending upwardly from the blocks 24 through vertical openings in the adjusting screws 30 and having nuts 36 secured by threaded engagement thereon adapted to engage the tops of the screws 30 and limit downward movement of said blocks. By adjusting the nuts 36 the presser roller may bcHadJuSted toward and from the bufiing r0 The work support comprises a flat plate BSwhich is arranged to support the work in position to be fed between the presser roller and the buliing roll and to cooperate with the presser roller to position the work in proper relation to the bufiing roll. The plate 38 extends into close proximity to the surface of the presser roll so that the article to be bufl'ed is pressed between the roll and the said plate and its lower surface brought into a osition to be acted upon by the buil'- ing ro The position of the lower surface of the article is determined by the plate 38 which is adapted to act as a gage plate to maintain the article in position to be operated upon, re ardless of irregularities in its shape or thicdmess. The work supporting plate 38 is arranged for vertical adjustment toward and from the periphery of the presser roller and for adjustment in the direction of the line of feed of the work in order that the plate may be so positioned that the work will be subjected to the proper degree of ressure as it passes between the presser rol er and said plate. To this end the plate 38 is adjustably secured upon the top of a support 40 by machine screws 42 extending through slots in the plate and into the support, the slots being so arranged that upon loosening the screws the work supporting plate may be adjusted relatively to its support in the direction of the line of feed of the work. The support 40 is mounted upon the top of a. vertical plate 43 which is removably clamped against vertical surfaces ri formed on the frame of the machine as by means of bolts 46 extending through vertical slots in the plate 43 and tapped into the frame of the machine. The vertical plate 43 is provided at its lower edge with two lugs *8, arranged on opposite sides thereof, through which vertical adj usting screws 50 extend, said screws having their lower ends bearing against the base plate 8 of the machine. With this arrangement by turning the screws 50 the vertical plate 43 may be adjusted vertically and consequently the work supporting plate 38 which is carried thereby may be adjusted vertically toward and from the periphery of the presser roller. The presser roller serves also as a feeding roller and means hereinafter described are provided for rotating this roller so as to feed the work. Means are also provided for rotating the butting roll in a direction opposite to that of the presser roller but at a, much higher rate of speed than the latter.

The brush for cleaning the bufl'ed surface of the work comprises a rotary brush 52 secured to a shaft 54 which is arranged to be rotated in a direction such that the brush assists in feeding the work by mechanism hereinafter described. The shaft 54 is mounted in bearing blocks 56 which are arranged in guideways formed in the side plates 6 of the machine. Each of the side plates 6 of the machine. Each of the blocks 56 is provided with a threaded rod 58 which extends downwardly therefrom through openings formed in the bottom walls of the guideways and into recesses 60 arranged below the guideways. A pair of nuts 62 and 63 threaded upon each of the rods 58 and arranged to engage the top and bottom surface of each recess 60 serve to secure the blocks 56 in adjusted position. \Vith this construction the blocks 56 may be adjusted vertically to bring the brush into proper position to clean the lower surface of the work after the latter has passed between the presser roller and the bufling roll.

To hold the work in operative engagement with the brush during its movement thereover there is provided a freely rotatable roller 62 arranged substantially over the brush. The roller 62 is secured upon a shaft 64 rotatably mounted in bearings carried by a bar 66 which is provided at its ends with transverse projections 68 having split clamps 70 by which the projections are respectively clamped upon the tubular sleeves 22 in which the shaft of the presser roller is journaled. Upon loosening the clamps 70 the bar 66 may be swung about the sleeves 2:2 as an axis to place the roller 62 in adj usted position relative to the brush and the roller may be held in this position by tightening the said clamps.

In buffing leather articles it is sometimes desirable to bufi' only a portion of the article, as for example, in operating upon leather soles it is customary to bufi' only the forepart and shank, leaving the heel part unbufied. Accordingly, the present machine has provision whereby a portion of the work may be passed through the machine without being bufi'ed and thereafter the remaining portion of the work brought into operative relation with the buifing tool. In accordance with a convenient construction there is provided means under the control of the operator for moving the presser roller away from the binding roll in order that the ortion of the work which is not to be bufi'e may be passed by hand between the presser roller and the bufiing roll and out of operative contact with the latter, the construction being such that thereafter the presser roller may be lowered to press the remaining portion of the work into operative contact with said bailing roll.

The means for raising the presser roller comprises a suitable treadle 72 connected by a pair of links 74, one upon each side of the machine, with the front ends of levers 76 pivoted at their middle portions upon oppo site sides of the base plate 8, the links 78 pivotally connecting the inner ends of the levers 76 with the blocks 24 which carry the presser roller. With this construction it will be seen that upon pressing the treadle 72 the presser roller will be raised in opposition to the springs 28 and upon releasing the treadle said springs will move the presser roller into operative relation to the boiling roll.

In order that the particles of matter removed from the work by the bufiing tool may not be thrown by said tool on to the brush and thereafter distributed by the brush over the work, there is provided a guard arranged between the bufiing tool and the brush. This guard is preferably formed of sheet metal and comprises a portion 80 curved around the front and lower surface of the brush and a horizontal part 82 sustained slightly below the line of feed of the work by oppositelv extending projections 84 secured to the si e portions 86 of a work supporting table 88 that is supported at the rear of the hufiing roll between the side plates 6 and over which the work passes after it has been acted upon by the bufling roll. With this arrangement particles of matter removed from the work by the bufiing roll may be drawn down between said roll and the guard by the suction apparatus to be hereinafter described so that the brush is protected to a considerable extent from said particles. If for any reason an article becomes deflected downwardly after passing between the presser roller and the buffing roll the horizontal portion 82 of the guard will, in such case, serve as a support for the article so as to insure its passage between the brush and the auxiliary roller in its movement through the machine.

The suction apparatus for conveying away the fine dust produced by the action of the butling roll upon the work comprises an exhaust fan 90 mounted in a suitable casing. This casing is located at the rear of the brush, and the side adjacent the brush is provided with openings through which the dust may pass. The work supporting table 88 which is arranged above the casing has a plurality of slits 94 formed therein through which air may be drawn downward by the fan. This construction insures that a sufficient volume of air will be drawn through the machine to convey away substantially all of the particles of matter removed from the work by the buffing roll. The fan 90 is secured upon a horizontal shaft 96 which is rotatably mounted in bearings formed in the fan casing and driven at a high rate of speed by means hereinafter described.

The mechanism for rotating the buffing roll comprises a pulley 97 secured upon the end of the buliing roll shaft 4, a pulley 98 upon the power shaft 100 of the machine and a belt passing over these pulleys. A. belt tightening pulley 102 positioned to engage the face of the driving belt of the buffing roll is arranged to be adjusted by a hand lever 104 to impart the proper tension to the belt. For rotating the presser and feed roller there is provided a sprocket 106 secured upon the power shaft 100, a large sprocket 108 secured upon a horizontal shaft 110 journalcd in the frame of the machine, a chain passing over these sprockets, a pinion 112 secured upon the end of the shaft 110, a gear 114 meshing with said pinion and secured upon the end of a horizontal shaft 116 journaled in the frame of the machine, a sprocket 118 secured upon this shaft, a sprocket 120 rotatably mounted upon a stud 122 secured in one of the side plates 6, a chain passing over these sprockets, a small sprocket 124 arranged upon the stud 122 for rotation with the sprocket 120, a sprocket 126 secured upon the end of the presser roll shaft and a chain connecting these sprockets.

The mechanism for rotating the brush and fan comprises a pulley 128 secured upon the end of the power shaft, a pulley 130 secured on the rush supporting shaft, a pulley 132 secured upon the fan shaft and a belt passing over these pulleys. This belt also passes around a belt tightening pulley 134 which may be adjusted by a hand lever to tighten the belt.

The power shaft 100 is provided with the usual fast and loose pulleys 136 and 138 and a belt shifter 140 arranged to be actuated by a treadle 142 is preferably provided for throwing the driving belt from one to the other of said pulleys to start or stop the machine.

To impart a lon itudinal reciprocating movement to the buffing roll there is secured upon the end of the shaft 116 a cam disk 144 having a cam slot that receives a roller 146 carried by the lower end of a cam lever 148 pivoted intermediate its ends between lugs 150 projecting from the frame of the machine. The upper end of the lever 1 18 is forked and each arm of the fork is provided with rollers 152 arranged to project into a peripheral groove 154 formed in a disk carried by the end of the bufling roll shaft. With this construction the buffing roll reciprocates longitudinally as it rotates, so that different portions of its acting surface travel in intersecting paths.

The machine is preferably provided with a guard 156 arranged to prevent contact of the operators hands with the presser roller, said guard being supported upon the plate 38 as shown in Fig. 2.

The 0 eration of the machine has been fully in icated in the above description of the construction and arrangement of its various parts and will be readily understood without a separate description thereof.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. A leather bufling machine having, in combination, a bufling roll, means for reciprocating said roll. a prcsser roll having a yielding surface and arranged to press the work against said buifing roll, means for rotating said rolls at different velocities, and means for distorting the work and forcing the distorted portion into the presser roll.

2. A leather buffing machine having, in

combination, a buffing roll, means for rotat- 'ing and reciprocating said roll, a rotary presser roll having a yielding facing and arranged to press the work against the buffing roll, and meansfor forcing the work along a narrow area into said yielding facing whereby an undulation is formed in said yielding facing and caused to travel about the periphery thereof.

3. A leather bufiing machine, having in combination, a rotary abrading device, a yielding presser roller for pressing the work into operative relation thereto, a brush ar ranged to clean the surface of the work after it has been'buffed, an auxiliary roller arranged to hold the work in engagement with said brush and means whereby said presser roller and said auxiliary roller may be simultaneously adjusted toward and from the abrading device and the brush respectivcly. r V

4. A leather buflin machine, having in combination, a rotary ufling device, a presser roller for holding the work in operative relation thereto, a rotary brush arranged to clean the surface of the work, an auxiliary roller for holding the work in contact with the brush and means for rotating said brush in a direction tending to assist the feed of the work.

5. A leather bufling machine having in combination a rotary bufiing roll arranged to be longitudinally reci rocated as it rotates, a presser roll of yielding material arranged tween the rolls close to the bite thereof and ada ted to produce an undulation in the stoc and to force said undulation into the yielding'material of the presser roll during the feeding movement.

7. A leather buffing machine having in combination, a bufiing roll, means for rotating and reciprocating said roll, a presser roll having a yielding surface andarranged to press the work against the bufling roll, and a worktable having its edge in close proximity to the surface of the presser roll,

.saidta'ble being inclined at such an angle that the plane of its supporting surface intersects said presser roll but does not intersect said abrasive roll.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JACOB R. SCOTT.

Witnesses:

, ALLAN H. BARROWS, BERNARD Bannows.

Correction in LettersPatent No. 1,147,819.

It. is hereby certified that in Letters Patent No. 1,147,819, granted July 2,, 1915, upon the application of Jacob R. Scott, of Boston, Massachusetts, for an improvement in Leather-Bufling Machines, an error, appears in the printed specification requiring correction as follows: Page 3, lines 57-58, strike out the sentence Each of the side plates 6 of the machine; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 29th day of February, A. 1)., 1916.

[sun] R. F. WHITEHEAD,

Acting Commissioner qf Patents. Cl. 5 1 1 7n

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