US1952634A

US1952634A - Buffing machine

Info

Publication number: US1952634A
Application number: US535154A
Authority: US
Inventors: William M Spry
Original assignee: PEERLESS MACHINERY CO
Current assignee: PEERLESS MACHINERY CO
Priority date: 1931-05-05
Filing date: 1931-05-05
Publication date: 1934-03-27
Anticipated expiration: 1951-03-27

Description

March 27, 1934.

W. M. SPRY BUFFING MACHINE Filed May 5, 1931 6 Sheets-Sheet 2 March 27, 1934.

w. M. SPRY 1,952,634

BUFFING MACHINE Filed May 5, 1931 6 Sheets-Sheet 3 /7Zve7@ 7 March 27, 1934. w. M. SPRY BUFFING MACHINE Filed May 5, 1951' 6 Sheets-Sheet 4 Q a & mi QNQ March 27, 1934. w SPRY 1,952,634

BUFFING MACHINE Filed May 5, 1931 6 Sheets-Sheet 5 March 27, 1934. SPRY 1,952,634

BUFFING MACHINE Filed May 5, 1931 6 Sheets-Sheet 6 Ma. 5 5 HTML; QDMVL 1 W @559.

Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE The Peerless Machinery Company, Boston,

Mass., a corporation of Massachusetts ApplicationMay 5, 1931, Serial No. 535,154

22 Claims.

This invention relates to bulling machines and more particularly to a machine of that character designed for bufiing soles, box-toes, counters and similar parts used in the shoe manufacturing industry.

Heretofore, in the preparation for usein the shoe manufacturing industry of various leather shoe parts such as soles, box-toes, counters and similar parts, it has been customary to pass said parts through a buffing machine for smoothing the unfinished faces thereof. In such machines the work has been passed between a feed roll and a bufling roll having a covering of abrasive material and revolving at'a much higher speed than the feed roll. It has been found, however, in the use of these machines that it has been in a'practical sense impossible to secure a perfectly smooth finished velvety surface because the sand or emery board used as a covering for the bufiing roll generally contains hard particles which leave linear marks in the finished surface which are difiicult to remove without subjecting the work to other operations and increasing the cost thereof.

The principal object of my invention is the provision in a machine of the character described of means for preventing any marks or grooves in the finished surface of the'work being buffed and for producing a surface 'which is perfectly smooth, free of marks and has what may be termed a velvet surface.

To this end my invention contemplates the provision in a bufiing machine of meansfor guiding the work through the machine and means for reciprocating the guiding means in a path parallel with the axes of the buffing and fed rolls in order to move or oscillate the work laterally as it is fed between the rolls. I have found that imparting this movement to the work during the feeding of it produces a highly finished, even, velvety surface upon the work free of any lines or marks so that a surface which is equal to the highest grade of hand work can be accomplished in one feeding of the work through the machine.

Another object of the invention is the provision of simple and efficient means forimparting to the work as it is fed a lateral reciprocating movement which means are at all times within the control of the operator and can be thrown into and out of operation while the machine is running and without affecting its operation in other respects.

A further object is the provision of work guiding means easily adjustable to various kinds and conditions of Work.

Other objects of the invention will be more specifically set forth and described hereinafter.

In the accompanying drawings showing one embodiment of the invention for the purpose of illustrating the principal thereof, Figure 1 is a front elevation of a machine constructed and adapted to be operated in accordance with my invention; Fig. 2 is an end elevation of the machine, with the pulleys omitted, looking from left to right in Fig. 1; Fig. 3 is an opposite end elevation of the machine looking from right to left in Fig. 1; Fig. 4 is a plan view on an enlarged scale of the machine with the upper cross bar removed; Fig. 5 is a central, vertical cross sectional view also on an enlarged scale of the upper part of the machine with the head shown by broken lines in turned up position; Fig. 6 is a side elevation as shown in Fig. 2, partly in sec-' tion on line 6-6 in Fig. 4 and on an enlarged scale, of the operating mechanism for reciprocating the work guiding means; Fig. '7 is an end elevation of the same looking from left to right in Fig. 7; Fig. 8 is a cross-sectional view on line 88 in Fig. 6; Fig. 9 is a longitudinal sectional view on line 9-9 in Fig. 3 of the speed reduction gears for rotating the feed roll; Fig. 10 is a plan view of same on line 10-10 in Fig. 3 and Fig. 11 is a side elevation of the gear train for rotating the feed roll.

. Referring to the drawings there is shown an upright frame preferably in one casting and skeleton in form comprising an enlarged base 10 and four corner standards 12 connected by a plurality of cross webs. The top portion 14 of the frame'is in the form of a hollow rectangular casing, the top edge of which is somewhat higher in the rear than in the front. Rotatably mounted in suitable bearings in the two ends of the casing 14 is a shaft 16 on which is fixedly mounted a bufiing roll 18 (Fig. 2) and pivotally mounted on a shaft 20 which is rotatably mounted in the two rear elevated portions, of the endsof said casing 14, is a head 21 carrying a feed roll 22, cooperating with said buffing roll, and a work support or plate 23 (Fig. 5).

The buffing roll 18 is of ordinary construction having a covering 24 of abrasive material held in place by having its ends turned into a longitudinal slot in the roll and held therein by a wedge strip 25. The upper operative portion of the bufiing roll projects through a suitable opening in the head (Fig. 5). The feed roll 22 is provided with a comparatively thick resilient covering of rubber or other suitable material and is secured on a shaft 26 rotatably mounted in ,ing the screw in adjusted position.

ing blocks having vertical grooves or channels formed in their two sides to receive the said side plates and strips. The bearing blocks are thereby locked in the side plates but may be removed when necessary by unfastening and removing the strips 33. A tie-bar 3a is secured at each end to a bearing block by a screw or otherwise so that the feed-roll, bearing blocks and tie bar move vertically as a unit in the side plates (Fig. 5).

For'adjusting the feed roll vertically and for permitting it to yield slightly when necessary, the following means may be provided. A top bar may be secured by bolts 36 to the tops of the side plates 28 and midway the top bar is bored to receive loosely a screw 37, the lower end of which is threaded into the tie bar (Figs. 1 and 5). An annular projecting shoulder 38 formed on the screw engages the upper surface of the top bar to limit the longitudinal movement of the screw downwardly in relation to the't op bar and by means of a hand-wheel 39, the screw maybe turned in one direction or the other to raise or to lower the feed roll vertically and in relation to the bufling roll. A short lever 4!) may be threaded at one end on the screw 3'7 to serve as a convenient and rapid means for lock- Since the screw is operated merely to raise and to lower the feed roll vertically and is loosely mounted in the top bar there is nothing to prevent upward movement of the feed roll under the impetus of the work. To hold it in a lowermost resilient position, a pair of springs 41 (Fig. i) may be interposed between the tie bar and the top bar, the tie bar being provided with round lugs 42 to receive the lower ends of the springs and to hold them against lateral displacement. The top bar may be provided with circular projections 43 bored and threaded to receive threaded nuts 44, the lower ends of which bear against the upper ends of the springs. In the head of each nut is a hole to receive a pin whereby the nuts may be turned downwardly or upwardly to increase or reduce the compression exerted by the springs upon the tie bar, and therefore the pressure exerted upon the work by the feed roll.

The work support or plate 23 may be of any suitable form but preferably is rectangular and at its forward edge, its upper face is bevelled to form a thin knife edge adapted to be projected in between thefeed roll and the bufiing roll (Fig. 5) In this connection, I have found if the buifing roll be mounted with its axis slightly ad- Vanced beyond the axis of the feed roll that the thin edge of the work plate can be inserted closer to the feed roll and secure better results than if the two rolls are mounted with their axes in a vertical plane (Fig. 5). The work support is preferably mounted on an inclined portion 46 of the head of the machine (Fig. 5) and be secured thereon by any suitable means as by screws 47 set in the side portions of the cover (Fig. 4), the heads of which are adapted to overlap the sides of the work plate for holding it horizontal plane and I have found that it can be projected further in between the feed roll and the buffing roll if it is thus inclined than if it lies in a horizontal plane. In adjusting the work plate to the feed roll, the best results are secured by having the thin forward edge of the work plate in light contact with the resilient surface of the feed roll but for heavier work, it

may, if desired, be arranged in close proximity to the surface of the feed roll rather than in contact with it.

For cleaning the work after ithas passed by the bufling roll, a brush roll 50 is mounted on the shaft 20, which roll is of any suitable construction and may be rotated in either direction but preferably in a forward direction to carry the finished work out at the rear side of the machine. To hold the work down upon the cleaning roll, an elongated guide plate 51 loosely mounted on two headed screw pins 52 threaded into the head 21 at 53 (Fig. 5). The guide plate is supported by nuts 54 threaded on the pins and is held in that position by helical springs 55 mounted one on each pin between a loose collar 56 and the head of the pin which permits the plate to yield in an upward direction when necessary. The rear edge of the guide plate adjacent the feed roll is curved upwardly into close proximity to the feed roll and may be provided at each end with a supporting stop pin 5'7, adjustably held in the guide plate by set nuts 58 and 59. Between the bufiing and cleaning rolls and in advance of the latter roll are transverse portions 60 and 61 (Figs. 4 and 5) re spectively of the head 21 which portions serve to close the spaces on both sides of the cleaning roll to prevent the work from curling down into the chamber 62 in which is mounted the buffing roll. The transverse portion 60 may, if desired, be provided with a plate 63 adjustably secured to the top thereof and having one edge arranged in close proximity to the bufiing roll to prevent the work curling downwardly around that roll.

'The cover 21 pivotally mounted on the shaft '20 may, with the feed roll mechanism mounted thereon, be turned upwardly on said shaft into the position shown by broken lines in Fig. 5 in order to give access to the buffing roll when necessary. For adjusting the normal position of the cover to the frame, a screw 65 may be threaded upwardly through a lug 65 on the front side of the frame top portion 14 to bear against the under surface of a lug 67 on the cover. A set nut 68 holds the screw 65 in adjusted position.

For imparting a lateral reciprocatory movement to the work as it is fed between the feed and buffing rolls, a pair of guide members is provided with means for reciprocating the same in a path parallel with the axes of the said rolls. One form of guiding member is shown as a flat bar 70, of which a pair is supported edgewise on the work support by a rod 71 (Fig. 4) Each guiding member is provided with an upwardly extending arm 72 carrying an' elongated sleeve 73 bored to receive the rod 71 and to form an elongated bearing to prevent rocking of the guiding member. One of the members is fastened to the rod '71 by a screw 74'and the other member is held normally against a collar 75 fastened in adjusted spring can be regulated by adjusting the collar '78 on the rod 71. The guiding members are arranged approximately parallel to the normal line of feed of the work and preferably are slightly curved outwardly from each other to permit the work to have certain freedom of movement in a lateral direction during the feeding thereof.

The rod 71 is supported loosely in sleeved brackets and 81 (Fig. 1) fastened to the sides of the head 21 and for imparting a reciprocatory movement to this rod any suitable means may be provided such as an arm 83 pivotally mounted on a stud shaft 84 and having a yoked end 85 adapted to receive a crank 86 for rocking said arm on said stud shaft (Figs. 6 and 7). The upper end of said arm 33 is connected to the rod 71 in such manner as to effect a reciprocation of the rod 71 in a straight path by said rocking movement. The stud shaft is mounted in a sleeved portion 8'7 of the bracket 81 and the arm 83 is held thereon by a nut 88 and washer 89. In its top the arm 83 is provided with a longitudinal bore 90 for receiving loosely the spindle 91 of a yoke 92, the ends of which carry threaded pins 93 having conical points engaging oppositely located depressions in the perimeter of a collar 94 on the rod 71. When the arm is rocked, the rod 71 is recip'rocated longitudinally in the

brackets

80 and 81, the yoke 92 moving upwardly and downwardly in the bore 90 to compensate for the differential movement of the arm and the rod. The crank 86 is mounted in a crank disk 95 having an integral shaft portion 96 rotatably mounted in the sleeved portion 9'7 of a bracket 98 fastened to the front upper part 14 of the frame of the machine by bolts 99. Upon the shaft portion is loosely mounted a grooved wheel 100, adapted to be driven from the main shaft of the machine and having on one side an extended hub 102. A simple clutch mechanism is provided for locking the shaft and wheel together to operate the reciprocating means and this mechanism. comprises a cross pin 103 carried by a pin 104 movably mounted in the bored end of the shaft 96, which cross pin is adapted to enter slots in the hub of the wheel when the pin 104 is pushed inwardly and thereby lock the shaft and wheel together. The shaft 96 is provided with a pair of oppositely arranged longitudinal slots 105 through which the ends of the cross pin 103 project and which permit a limited movement of the pin 104 in the bore of the shaft (Fig. 6). In the hub of the wheel is formed a plurality of slots 106 arranged in one or more diametrical pairs (Fig. 8), each pair being adapted to receive the two ends of the cross pin when the pin 104 is in inward position in order to lock the two parts, shaft and wheel, together to operate the reciprocating mechanism. Disconnection of the two parts may be accomplished by pulling the pin 104 outwardly by means of a finger wheel 107 attached to the outer end of the pin. The inner portion 108 of the hub 102 is reamed out so that the wheel 100 may then idle.

The various elements of the machine having motion are operated from a main shaft 110 mounted in suitable bearings in the cross webs 111 and 1120f the frame and on one end there is fixed to the main shaft a driving pulley 113 adapted to be connected by a belt (not shown) to any suitable source of power (Fig. 1). An idler pulley 114 is also mounted on the main shaft and a shifting mechanism is provided for moving the belt from one pulley to the other to start or stop the machine. The shifting mechanism is of usual form comprising a rod 115 loosely mounted in the cross webs 111 and 112 of the frame and carrying on one end guides 116 for engaging the side edges of the belt for moving the belt from one pulley to the other when the rod is reciprocated longitudinally through the medium of a lever 117, the lower end of which engages a slot in a sleeve 118 fixed to the rod. The lever 117 is fastened to a stud shaft 119 mounted in cross webs 120 of the frame and on the outer end of said shaft is fastened a lever 121 in position to be reached by the operator for controlling the application of power to the machine.

For operating the buffing roll, there is fixed to the other end of the main shaft a fiy wheel 123 (Fig. 1) connected by a belt 124 to a pulley 125 on the buffing roll shaft 16. The buifing roll is necessarily operated at a very high speed which. is attained by us ng a fly wheel of relatively much larger diameter than the diameter of the buffing roll shaft pulley. The feed roll, however, rotates at a relatively low speed and therefore I provide speed reducing means between the main shaft and that roll. Upon one end of the feed roll shaft 26 is fixed a gear 127 which is part of a gear train comprising in addit on a gear 128 and an intermediate gear 129, the three gears being mounted on links 130 and 131 (Fig. 3). The gear 128 is loosely mounted on the brushing roll shaft 20 and is secured to a sprocket wheel 132 also loosely mounted on said shaft which sprocket wheel is driven in dependently of the rotat on of the brushing roll shaft by a sprocket chain 133 and sprocket wheel 134. The latter wheel is driven from the main shaft through a speed reducing device as follows. Rotatably mounted in

sleeved brackets

135 and 136 secured to one side of the frame is a vertical shaft 137 having aflixed to its lower end a worm gear 138 (Fig. l) wh ch meshes with a worm 139 formed on the main shaft and secured to its upper end a bevel gear 140 meshing with another bevel gear 141 fixed to a stud shaft 142 which carries a gear 143 meshing with a gear 144 fixed to a stud shaft 145 set in the frame 10. This'shaft carries a smaller gear 146 which in turn meshes with a larger gear 147 on a stud shaft 148 (Fg. 10).

For the purpose of avoiding a positive driving connection between the main shaft and the feed roll in order that breakages may be prevented when the feed roll meets with any undue obstruction or resistance in feeding the work, I provide for a slid'ng connection between the main shaft and the-feed roll at the stud shaft 148. This is accomplished by mounting upon said stud shaft,

hich is fixed against rotation, an elongated sleeve 150 adapted to rotate on said stud shaft, upon which sleeve is mounted the gear 147 which is fitted to the sleeve tightly so that when it is rotated it will turn the sleeve. The inner end of the sleeve is provided with annular steps to receive fibre rings 151 for increasing the frictional contact between the gear and the sleeve. The sprocket wheel 134 is keyed to the sleeve by a key 152 in a slot 153 in the sleeve and said sprocket wheel is held against the gear 147 by a helical spring 154, the compression of which is regulated by a nut 155 mounted on the threaded end of the sleeve 150.

Fibre washers

156 and 157 may be interposed between the gear and sprocket wheel and the sprocket wheel and spring respectively. By means of this construction, the rotation of the bufiing roll through the rotation of the sleeve 150 and sprocket wheel 134 and the other elements is positive but the gear 147 having merely frictional engagement with the sleeve 150 whenever any undue force opposes the rotation of the feed roll then the gear 147 will slide upon the sleeve 150 either producing a reduced speed of the sleeve or permitting it to cease to rotate until the obstruction to the rotation of the feed roll has been removed.

The various parts between the main shaft and the sleeve 156 are so proportioned that the speed of the sleeve is materially reduced below the speed of the main shaft with the additional advantage of a sliding connection as just pointed out. The arrangement of the

gears

127, 128 and 129 and links 130 permit of a vertical adjustment of the feed roll without disturbing the relation between these gears. Any up and down movement of the feed roll is compensated for by movement of the links without disconnecting the gears.

lhe brushing roll 50 is operated from the main shaft through the medium of a grooved wheel 160 mounted thereon, a cord belt 161 and a grooved wheel 162 on the brushing roll shaft 20 and the reciprocating mechanism is also operated from the main shaft but at a reduced speed through the instrumentality of a grooved wheel 163 on the main shaft which drives by a cord belt 164 a grooved wheel 165 mounted on a stud shaft 166 carried by a bracket 167 fastened by bolts 168 to One side of the frame. A smaller grooved wheel 170 is mounted on the stud shaft 166 and is connected by a belt 171 for driving the grooved wheel 100 for operating the reciprocating mechanism when the clutch is thrown in.

For removing the dust and particles of the work thrown off by the buffing roll, the buffing roll chamber in the head of the machine may be connected by a suitable conduit to a blower mechanism.

In the operation of the machine, the feed roll is adjusted in close proximity to the buffing roll and the work plate is adjusted so that its thin forward or knife edge li htly engages the resilient surface of the feed roll. It is important that the work plate should project in between the feed roll and buffing roll to such an extent that its forward knife edge engages the feed roll at or near the line of closest approach of the bufiing roll to the feed roll so that the work comes into contact with the buffing roll just as soon as it passes off the knife edge of the work plate. The reciprocating mechanism is normally out of operation with the clutch pin 104 out and the work guiding members 70 are adjusted to correspond to the width of the work to be buffed.

The work is laid fiat upon the work support With the face to be buffed turned downwardly and is pushed forwardly by the operator between the guiding members into engagement with the feed roll. At this time the operator pushes the clutch pin 104 inwardly by pressing the handle portion 107 which thereupon causes the pin 103 to engage the slots 106 and to connect the shaft 96 to the pulley 100 which starts the reciprocating mechanism in operation. The work as it is fed forward by the feed roll to the bufiing roll is reciprocated laterally through the instrumentality of the guiding members 70 which causes the work to oscillate from side to side as it engages the buffing roll and this lateral movement of the work prevents the formation of any ridges in the surface being buffed by the hard particles in the buffing roll. At the conclusion of the work, the

reciprocating mechanism is disconnected by pulling out the clutch pin.

By imparting a lateral oscillating movement to the work as it is fed through the machine, a very smooth, even, velvety surface is secured which is equal to the best hand work and this end is attained in one operation.

It is to be uderstood that my invention is not to be limited to the exact form herein shown and described, which form is set forth merely for the purpose of illustrating the principle of my invention but may be embodied in various other forms of construction within the purview of the following claims.

What I claim is:

1. In a machine of the class described, the

combination with a feed roll having a yieldable surface and a buffing roll, the axes of said rolls being substantially parallel and horizontal, the axis of the buiiing roll being advanced in the direction of work feed as respects the axis of the feed roll, of a work supporting plate projecting into the angle between the approaching surfaces of the rolls, the delivery edge of the plate being located substantially in the plane passing through the axes of the rolls and being normally substantially in contact with the surface of the feed roll, and reciprocating means movable transversely of the work supporting plate in a direction parallel with the axes of the rolls for oscillating the work as the latter is fed through the machine.

2. In a machine of the'cla-ss described, the combination with a feed roll and a buffing roll, the axes of said rolls being substantially parallel and with the axis of the buffing roll advanced in the direction of work feed as respects the axis of the feed roll, of a work supporting plate projecting into the angle between the approaching surfaces of the rolls, said work supporting plate having a sharp delivery edge located substantially in the plane of the axes of the rolls and normally substantially in contact with the surface of the feed roll, and a pair of relatively adjustable spaced bars movable transversely of the upper surface of the work support, and means for reciprocating said bars in unison thereby to oscillate the work as it approaches the rolls.

3. In a machine of the class described, the combination with a feed roll having a yieldable surface and a buffing roll, the axes of said rolls being substantially parallel and horizontal, the

means for reciprocating said members whereby to oscillate the work transversely as it is fed to the rolls 4. In a machine of the class described, the combination with a work support, a feed roll and a bufiing roll, of means for engaging the work on two opposite edges transversely the longitudinal axes of said rolls for guiding said work and means for reciprocating said guiding means in a direction parallel with the longitudinal axes of said rolls to oscillate the work while it is being fed through'the machine.

5. In a machine of the class described, the combination with a work support, a feed roll and a buiiing roll, of a rod .parallel with .said rolls, a pair of guide members mounted transversely said rod and in loose engagement with the upper face of said work support and means for reciprocating said rod longitudinally to oscillate the work as it is fed through the machine.

6. In a machine of the class described, the combination with a work support, a feed roll and a buffing roll, of a rod parallel with said rolls and mounted above said Work support, a

, pair of guide members adjustably mounted on said rod and means for reciprocating said rod longitudinally to oscillate the work as it is fed through the machine.

7. In a machine of the class described, the combination with a work-support, a feed roll and a buffing roll, of a rod parallel with said rolls, a pair of guide members mounted transversely said rod and in loose engagement with said work support, one of said guide members "'i being fixed in position and the other resiliently mounted to yield under strains and means for reciprocating said rod longitudinally to oscillate the work as it is fed through the machine.

8. In a machine of the class described, the combination with a work support, a feed roll and a bufiing roll, of a rod parallel with said rolls, a pair of guiding members mounted transversely of said rod, said guiding members being adjustable to vary the distance between them to ac- 1 commomate work of different widths and means for reciprocating said rod longitudinally to oscillate the work as it is fed through the machine.

9. In a machine of the class described, the combination with a feed roll and a buffing roll, the axes of said rolls being substantially parallel and the axis of the buffing roll being advanced in the direction of the work feed as respects the axis of the feed roll, of a work supporting plate having a flat upper surface inclined upwardly and 5 j projecting into the angle between the approaching surfaces of the rolls, said plate being beveled at its delivery edge, a pair of work positioning members movable in unison transversely across the upper surface of the work support and engageable with the opposite lateral edges of the work, respectively, and means for reciprocating said members in a direction substantially parallel to the axes of the rolls whereby to oscillate the work as the latter approaches the rolls.

10. In a machine of the class described, the combination with a feed roll having a yieldable surface and a bufi'ing roll, the axes of said rolls being substantially parallel and horizontal, of a work supporting plate inclining upwardly toward its delivery end and into the angular space between the approaching surfaces of the rolls, the delivery edge of said plate being beveled and being disposed substantially in the plane of the axes of the rolls, a pair of work positioning members spaced apart and arranged to move transversely across the upper surface of the work support, said members being substantially parallel, means for adjusting the distance between said members, and means for reciprocating said members in unison in a direction parallel to the axes of the rolls whereby to oscillate the work as the latter advances toward the rolls.

11. In a machine of the class described, the combination with a fixed work-support, a feed roll and a bufiing roll, of means for guiding the work and means within the control of the operator for reciprocating said guiding means in a direction parallel with the longitudinal axes of said rolls to oscilate the work as it is fed through the machine.

12. In a machine of the class described, the combination with a fixed work support, a feed roll and a buiting roll, of means for guiding the work to said rolls, means normally inoperative for reciprocating said guidingmeans in a direction parallel to the longitudinal axes of said rolls, means for operating said reciprocating means and a clutch for connecting said reciprocating means to said operating means at the will of the opera-.

tor. V

13. In a machine of the class described, the combination with a work support, a feed roll and a buffing roll, of a rod mounted for longitudinal reciprocation, a pair of guide members adjustably mounted on said rod between which the work is fed, means normally inoperative for reciprocating said rod longitudinally to oscillate the work as it is fed through the machine, means for operating said reciprocating means and a manually operated clutch for connecting said operating means to said reciprocating means.

14. In a machine of the class described, the combination with a fixed work-support, a feed roll and a bufiing roll, of a pair of members between which the work is guided to said rolls, means for reciprocating said members laterally, said means being normally inoperative, and. a manually operated clutch for rendering said reciprocating means operative at the will of the operator.

15. In a machine of the class described, the combination with a feed roll and a buffing roll, of a rod mounted for longitudinal reciprocation in a path parallel to the axes of said rolls, a pair of transverse members carried by said rod for guiding the work through the machine and means for reciprocating said rod longitudinally, said means comprising a crank and connections intermediate said crank and said rod for transforming rotary movement into a reciprocating movement.

16. In a machine of the class described, the combination with a feed roll and a buifing roll, of means for guiding the work and means within the control of the operator for reciprocating said guiding means in a direction parallel with the longitudinal axes of said rolls, said reciprocating means comprising a rod mounted for longitudinal reciprocation, an arm pivotally mounted for rocking movement to reciprocate said rod, a crank for rocking said arm, means for rotating said crank, said means being normally disconnected from said crank and a clutch for connecting said crank to said rotating means at the will of the operator to reciprocate said rod.

17. In a machine of the class described, the combination with a main shaft, a feed roll and a bufiing roll, of a member mounted for longitudinal reciprocation, work guiding means carried by said member, an arm having a yoked end and pivotally mounted for rocking movement to reciprocate said member, a crank for rocking said arm, means for driving said crank from said main shaft, said means being normally disconnected from said crank and a manually operated pin clutch for connecting said crank to said driving means.

18. In a machine of the class described, the combination of a main shaft, a feed roll, a bufling roll, means for rotating said feed roll from said shaft, said means including a sliding connection to permit the feed roll to stop in case it meets with an obstruction in the feeding of the work, means for guiding the work and means for reciprocating said guiding means in a direction parallel with the longitudinal axis of said roll.

' 19. In a machine of the class described, the combination of a relatively high speed buffing roll, a relatively low speed feed roll, a fixed work-support over which the work is fed to said rolls and means for oscillating the work as it is fed through the machine 20. In a machine of the class described, the combination of a relatively high speed buffing roll, a relatively low speed feed roll, a fixed work- 1 support over which the work is fed to said rolls,

a pair of guiding members loosely mounted on said work-support for engaging opposite edges of the work and means for reciprocating said members laterally to oscillate the work as it is fed through the machine.

21. In a machine of the class described, the combination with a fixed work support, a feed roll and a buffing roll, of a pair of guide members mounted in loose engagement with said work support and adapted to engage opposite edges of the work, one of said members being capable of yielding under unusual strain, and means for reciprocating said members laterally in a path parallel with said rolls to oscillate the work as it is fed through the machine.

22. In a machine of the class described, the combination with a work-support, a feed roll and a buffing roll, of a pair of guide bars mounted on edge in loose engagement with said work-support for engaging opposite edges of the work, one of said bars being yieldable under unusual strain, and means for reciprocating said members laterally in a path parallel with said rolls to oscillate the work as it is fed through the machine.

WILLIAM M. SPRY.