US2651240A - Machine for shaving electrotypes, stereotypes, and the like - Google Patents

Description

Sept. 8,1953

D. E. SUTTON THE LIKE MACHINE FOR SHAVING ELECTROTYPES, STEREOTYPES, AND

6 Sheets-Sheet 1 Filed April '7, 1950 HE LIKE D. E. SUTTON MACHINE FOR SHAVING ELECTROTYPES, STEREOTYPES, AND T 6 Sheets-Sheet 2 Filed April 7, 1950 mu T. NJ E, V fl ma 0 0 0. D

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D. E. SUTTON Sept. 8, 1953 2,651,240 THE LIKE MACHINE FOR SHAVING ELECTROTYPES; STEREOTYPES, AND

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ATTORNEY.

HE LIKE D. E. SUTTON MACHINE FOR SHAVING ELECTROTYPES, STEREOTYPES, AND T e SheetS-Shet 4' Filed April 7, 1950 m R k m U w R N R v Q W 3 Q m m p 3 Q Q w v N. W %QIII m m |IM. Q. H HI 5 w Y N $12 RV .W.. mm mm Q 1% fi 8 & I & R QM, u QQQ Q I o ////M/// ////-m 4/4/44 enlnl m e Q, e .N... \K m. m R TL Q MN mm & 3 @N NM MN mm x wm fifi Q ATTORNEK Sept. 8, 1953 D. E. SUTTON 2,651,240

MACHINE FOR SHAVING ELECTROTYPES, SIEREOTYPES, AND THE LIKE Filed April 7, 1950 s Sheets-Sheet 5 IN V EN TOR.

ArroR/vlsx Patented Sept. 8, 1953 UNITED STATES PATENT OFFICE MACHINE FOR SHA STERE OTYPE VIN G ELECTROTYPES, S, AND THE LIKE 9 Donald E. Sutton, Kalamazoo, Mich., assignor to Hammond Machinery Builders, Inc., Kalamazoo, Mich.

Application April 7, 1950, Serial No. 154,700 16 Claims. (01. 90-25) This invention relates to improvements in a machine for shaving electrotypes, stereotypes and the like.

The main objects of this invention are:

First, to provide a machine of this character which is capable of accurately shaving a full page plate on one stroke or pass of the table.

Second, to provide a machine having these advantages which may be accurately and quickly adjusted to position the blade relative to the work or to gauge the depth of the cut.

Third, to provide a crosshead mounting in which the deflection of the crosshead has been reduced to an unobjectionable minimum and one in which the wear on the parts in use is minimized.

Fourth, to provide a structure having these advantages in which the chips are automatically swept from the work on the completion of the cutting stroke.

Fifth, to provide a mounting and driving means for the table which results in a greatly reduced power requirement.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a perspective view of a machine embodying my invention with the table in its forward or loading position.

Fig. 2 is a fragmentary plan view, certain parts normally concealed in such a view being indicated by dotted lines.

Fig. 3 is a side elevational view partially in vertical section on a line corresponding to line 3-3 of Fig. 2.

Fig. 3A is an enlarged fragmentary section on a line corresponding to line 3A3A of Fig. 2 with the table approaching the end of its cutting stroke.

Fig. 4 is an enlarged fragmentary view partially in vertical section on a line corresponding to the broken line 4-4 of Fig. 2.

Fig. 5 is an enlarged fragmentary view partially invertical section on a line corresponding to line 55 of Fig. 2.

Fig. 6 is a fragmentary top plan view of the crosshead and some of the parts associated therewith, with the cover of the crosshead removed, certain parts being shown in horizontal section on a line corresponding to line 6--6 of Fig. 5.

Fig. 7 is an enlarged fragmentary vertical secnot directly opposite.

corresponding to line 1-1 of thereon. The bed member longitudinal central recess 3 in the top thereof. The table 4 is provided with depending rail portions 5- having longitudinal outwardly facing grooves 6 therein receiving the outwardly facing raceways 1. These raceways 7 are opposed. to inwardly facing raceways 8 disposed in the longitudinal grooves 9 in the bed member. Bearing balls l0 coact with these raceways to sustain lateral and vertical loads on the table. The side edges II of the table project well beyond the bearings. The table is thus entirely supported by these roller bearings permitting the reciprocation of the table under heavy loads and with a minimum of power expenditure. The balls [0' and the raceways are hardened to resist Wear and support the table with a minimum of vertical and lateral movement.

The bed is provided with cylindrical posts 12 of relatively large diameter disposed on opposite sides of the path of travel of the table and slightly offset relative to each other, that is, they are The posts are secured to the bed by means of the lag bolts or heavy screws l3, their lower ends being tapped and threaded to receive the screws, the posts being provided with wrench receiving recesses Id. The crosshead designated generally by the numeral 15 comprises the base member l6 and the detachable cover or top [1. The crosshead is provided with depending sleeve-like internally cylindrical bearings I8 integral with the base member I 6 which slidably embrace the posts and being in close fitting engagement therewith. The adjusting screws I9 and 20 have threaded engagement with the posts which are internally threaded to receive the same. These adjusting screws are supported by roller bearings designated generally by the numeral 2| and they are provided with sprocket wheels 22 above the bearings, the sprocket wheels being keyed to the screws.

The posts [2 are provided with bores 23 receiving the preloaded thrust springs 24 which serve to take up any slack in the threads. These springs engage the annular thrust member 25 which coacts with annular ribs or collars 26 on the screws (see Fig. 4.) In this figure the crosshead is shown in retracted position. The sprockis provided with a et wheels 22 are connected by the sprocket chain 21 which is provided with a tightener consisting of the arm 28 adjustably mounted at 29 and carrying shoes 30 engaging the reaches of the chain between the sprocket wheels. The cover or top H of the crosshead is removed for adjustment of this tensioning means. The screw 20 has an upward extension 3| to which the hub 32 of the handwheel 33 is keyed at 34. The wheel is provided with a knob grip 35 to facilitate manipulation. The annular indicia member .36 is secured to the hub of the handwheel to rotate therewith and is provided with scale indicia 31 which is properly calibrated to the pitch. of the adjusting screws so that the operator can accurately determine the amount of adjustment of the crosshead. The indicia member 36 is provided with an adjustable pointer 38 which may be adjusted to the desired position on the scale and the handwheel then rotated until the pointer comes into contact with the stop 39. I also provide a vertical pointer 4t mounted on the bed member and coacting with an indicia scale 4| on the crosshead (see Fig. 4); This is used for the initial adjustment of the crosshead. The posts or columns on which the crosshead is mounted are of relatively large diameter and are externally cylindrical so that a very close hearing fit may be had between the bearing sleeves of the crosshead and the posts.

To further secure the crosshead in its adjusted position and relieve the threads of undue load, I provide the crosshead with. a pair of clamping members 42 arranged in suitable borelike openings 43 to support the clamp members in a general tangential relation to the posts (see Figs. 5 and 6). These clamp members are simultaneously engaged and released by means of the actuating or connecting rod 44 engaged therewith and having one end 45 threaded to receive the adjusting nut 46 which is provided with a projecting grip 41. These clamp members act to prevent movement between the posts and crosshead when the crosshead is under cutting load.

The table is provided with an abutment 48 at itsfront end which projects above the face of the table to receive the thrust of the work laid on the table. This abutment is vertically adjustable, adjusting means being indicated at 49, the details, however, the operator when the crosshead is reaching the lower range of its adjustment I provide a stop dog 50 pivoted at 5! to normally engage the bed. The particular advantage of this is that it calls the operators attention to the fact that the table thrust abutment should be checked to determine that it is properly adjusted to clear the cutter blade.

The knife 52 is clamped against the rest 53 provided therefor on the underside of the crosshead, a plurality of clamping screws 54 being provided for this purpose, that is, the screws are spaced along the length of the blade. The work press roller designated generally by the numeral 55comprises a shaft 56 with a plurality of sec tions 5'! thereon. To prevent springing of the roller and to yieldingly urge it to the work the crosshead is provided with a plurality of bores 58 receiving the thrust members 59 and the biasing springs 80 provided therefor. These thrust members 59 have V-shaped annular grooves 51 therein which receive the adjusting screws 82 best shown in Fig. 8, these screws having tapered ends 53 coacting with the grooves 6 I. The thrust of the springs 69 is sufiicient to provide the denot being shown. To warn sprocket l4,

sired thrust on the roller and the adjusting screws are provided to determine the extreme thrust position of the press roller. The biasing springs 58 are positioned along the length of the press roller so that the roller does not spring or bow under load. It will be noted that the cutting edge of the blade is in approximately the vertical plane through the centers of the posts and in as much as the posts are offset the blade is disposed at an angle to the path of travel of the table which provides a suitable shearing cut. This positioning of the blade minimizes the canting stresses on the crosshead and its supports.

The hold-down roller 65 is journaled in the thrust member 6? arranged in bore 58 and provided with thrust springs 69. This hold-down roller 88 is positioned in advance of the cutting blade and one of its main functions is to prevent tilting of the work as the blade begins its out. It will be noted that the press roll engages the Work at the rear of the cut whereas the roller 66 engages the work in advance of the cut and therefore normally the pressure thereon is not as great as on the press roll.

As the machine is designed to shave wide plates and to take substantial shavings therefrom, I provide a grooving cutter H which is mounted on the crosshead to engage and groove the work in advance of the hold-down roller 66. The result of this grooving is that the chip or shaving is split and under ordinary conditions relatively continuous shavings result as distinguished from fragmented shavings or small pieces and thistends to a cleaner smoother cut or surface. The grooving cutter H is vertically adjusted to cut the groove to the desired depth. The machine is designed so that the table clears the crosshead on the work stroke and the work may be lifted from the table at the rear and for most work a single stroke is sufficient.

I have pointed out the advantages of the ball bearing mounting for the table and this makes it possible to support the table with very little lost motion between the table and the bed; in fact, so minor as not to be objectionable. The table is driven through the sprocket chain 12 mounted on the front sprocket I3 and the driving the sprocket 13 being mounted on the upright shaft '15 while the sprocket 14 is mounted on the shaft Hi constituting a part of the transmission designated generally by the numeral 11. The motor is indicated at I8.

An electric brake mechanism designated generally by the numeral 19 is provided for the driving shaft of the motor so that the shaft is instantly stopped when the power is cut off from the motor. The electrical connections are not illustrated as it is believed they will be understood by those skilled in the art. It should be noted, however, that the machine is controlled from three switches designated generally by the numerals BI, 82 and 83 (see Fig. 2), 81 being the work stroke switch, 83 the return and 82 a stop switch. The switches 84 and are positioned to coact with certain parts on the table to automatically stop the table at the end of its stroke. The stop switch 82 is designed to stop the stroke at any point and the control switches 81 and 83 serve to provide a complete control, these switches 84 and 85 being in effect automatic controls. In the event the operators attention is otherwise directed the machine stops at the end of the stroke.

The driving chain 12 is provided with a driving roller 86 which engages the cross slide 81 on the rearendof the table (see Figs. 3 and 3A). This driving connection minimizes friction in the drive and a very large power-reduction results from the ball bearing mounting for the table and the chain drive as compared to the usual worm and nut drive and the consequence is not only a saving in power but also a reduction in strain on the machine. a

As the table clears the crosshead the chips are swept from the work into the discharge opening 88 provided therefor in the bed of the machine (see Fig. 3) from which the chips are discharged into a receptacle indicated by the dotted lines 89 and adapted to be inserted through an opening in the side of the machine, the end wall 90 of the receptacle-constituting a closure for the opening. The transmission embodies an automatic clutch, not illustrated, which disengages when under excessive load, thereby preventing breakage and loss of time as it is important in newspaper work and the like to avoid stoppage.

The driving mechanism is provided with a housing 91 attached to. the rear of the pedestal. In the embodiment illustrated a counterweight 92 is provided to connect to the table by means of the strips 93 disposed over the guide roller 94.

I have illustrated and described my invention in a highly practical embodiment thereof. I have not attempted to illustrate or describe other embodiments 0r adap' this disclosure will enable those skilled in the art to embody or adapt my invention as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1 1; In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocable thereon, adjustable shaving structure mounted over said table and comprising, vertical internally threaded cylindrical posts rigidly mounted on said bed at opposite sides of the path of travel of the table and in offset relation longitudinally of the table relative to each other, a crosshead provided with integral depending cylindrical bearings sleeved upon said posts, ball bearing mounted adjusting screws on said crosshead coacting with the threads in said posts, one of said screws being provided with a handwheel, said screws being provided with sprocket wheels disposed within said crosshead, a sprocket chain connecting said sprocket wheels, clamp members mounted on said crosshead to coact with said posts and having a common actuating element, a blade mounted on said crosshead for vertical adjustment thereon and with its cutting edge in approximately a vertical plane through the centers of the posts, a spring biased work pressure roller mounted on said crosshead at the rear of and closely adjacent to the blade, a spring biased work hold-down roller mounted on said crosshead in advance of the blade, a vertically adjustable scoring cutter mounted on said crosshead and positioned in advance of said hold-down roller, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, and driving means for said table.

2. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocable thereon, adjustable shaving structure mounted over said table and comprising, vertical internally threaded cylindrical posts rigidly mounted on said bed at opposite sides of the path of travel of' the table, a crosstations as it is believed that head provided with integral depending cylindrical bearings sleeved upon said posts, ball bearing mounted adjusting screws on said crosshead coacting with the threads in said posts, one'of said screws being provided with a handwheel, said screws being provided with sprocket wheels disposed within said crosshead, a sprocket chain connecting said sprocket wheels, clamp members mounted on said crosshead to coact with said posts and having a common actuating element, a blade mounted on said crosshead, a spring biased work pressure roller mounted on said crosshead at the rear of and closely adjacentto the blade, a spring biased work hold-down roller mounted on said crosshead in advance of the blade, a vertically adjustable scoring. cutter mounted on said crosshead and positioned in ad: vance of said hold-down roller, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, and driving means for said table.

3. In a machine for shaving electrotype andstereotype plates and the like, having a bed mem ber and a table reciprocable thereon, adjustable shaving structure mounted over said table and comprising, vertical internally threaded cylindrical posts rigidly mounted onsaid bed at opposite sides of the path of travel of the table, a crosshead provided with integral depending 'cylindrical bearings sleeved upon said posts, ball bearing mounted adjusting screws on said crosshead coacting with the threads in said posts, one of said screws being provided with a handwheel, said screws being provided with sprocket wheels disposed within said crosshead, a sprocket chain connecting said sprocket wheels, a pointer on said bed member, said crosshead being provided with vertical graduated indicia operatively associated with said pointer on said bed, clamp members mounted on said crosshead to coact with said posts and having a common actuating element, a blade mounted on said crosshead, a spring biasedwork pressure roller mounted on said crosshead at the rear of and closely adjacent to the blade, a spring biased work hold-down rollermounted on said crosshead in advance of the blade, a vertically adjustable scoring cutter mounted on said crosshead and positioned in advance of said hold-down roller, said bed beingprovided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, and driving means for said table.

4. In a machine for shaving electrotype .and stereotype plates and the like, having a bed meme ber and a table reciprocable thereon, adjustable shaving structure mounted over said table and comprising, vertical internally threaded cyline drical posts rigidly mounted on said bed at opposite sides of the path of travel of thetable, a crosshead provided with integral depending cylindrical bearings sleeved upon said posts, pairs of return thrust springs for said crosshead, said pending rods extending into said thrust springs,

said crosshead at the rear of and closely adja cent to the blade, a spring biased work holddown roller mounted on said crosshead in advance of the blade, a vertically adjustable scoring cutter mounted on said crosshead and positioned in advance of said hold-down roller, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, and driving means for said table.

5.. "In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocable thereon, adjustable shaving structure mounted over said table and comprising, vertical internally threaded cylindrical posts rigidly mounted on said bed at opposite sides of. the path of travel of the table, a crosshead provided with rigid depending cylindrical bearings sleeved upon said posts, return thrust springs for said crosshead, adjusting screws on said crosshead coacting with the threads in said posts, one of said screws being provided with a handwheel, driving connections between said screws, clamp members mounted on said crosshead to coact with said posts, means for simultaneously engaging said clamp members, a blade mounted on said crosshead, a work pressure roller mounted on said crosshead at the rear of the blade, and driving means for said table.

6. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocable thereon, adjustable shaving structure mounted over said table and comprising, vertical internally threaded cylindrical posts rigidly mounted on said bed at opposite sides of the path of travel of the table, a crosshead provided with rigid depending cylindrical bearings sleeved upon said posts, return thrust springs for said crosshead, adjusting screws on said crosshead coacting with the threads in said posts, one of said screws being provided with a handwheel, driving connections between said screws, clamp members mounted on said crosshead to coact with said posts, means for simultaneously engaging said clamp members, a blade mounted on said crosshead, a work pressure roller mounted on said crosshead at the rear of the blade, a spring biased work hold-down roller mounted on said crosshead in advance of the blade, a vertically adjustable scoring cutter mounted on said crosshead to score the work in advance of the blade, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke or the table, and driving means for said table.

'7. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a reciprocating table, adjustable shaving structure mounted over said table and comprising vertical internally threaded posts rigidly mounted on said bed at opposite sides of the path of travel of the table, a crosshead provided with rigid depending cylindrical bearings sleeved upon said posts, adjusting screws coacting with the threads in said posts and connecting to said crosshead, one of said screws being provided with a handwheel, driving connections between said screws, clamp members mounted on said crosshead to coact with said posts, a connecting rod for said clamp members threaded at one end and provided with an adjusting nut whereby the clamp members are simultaneously actuated, a blade mounted on said crosshead for vertical adjustment thereon and with its cutting edge in approximately a vertical plane through the centers of the posts, a spring biased work pressure roller mounted on said crosshead at the rear of the blade, a spring biased Work hold-down roller mounted on said crosshead in advancev of the blade, a vertically adjustable scoring cutter mounted on said crosshead and positioned in advance of said hold-down roller, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, and driving means for said table.

8. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a reciprocating table, adjustable shaving structure mounted over said table and comprising vertical internally threaded posts rigidly mounted on said bed at opposite sides of the path of travel of the table, a crosshead provided with rigid depending cylindrical bearings sleeved upon said posts, adjusting screws coasting with the threads in said posts and connecting to said crosshead, one of said screws being provided with a handwheel, driving connections between said screws, a blade mounted on said crosshead for vertical adjustment thereon, a spring biased work pressure roller mounted on said crosshead at the rear of the blade, a spring biased work hold-down roller mounted on said crosshead in advance of the blade, a vertically adjustable scoring cutter mounted on said crosshead and positioned in advance of said hold-down roller, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, and driving means for said table.

9. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a reciprocating table, adjustable shaving structure mounted over said table and comprising vertical internally threaded posts rigidly mounted on said bed at opposite sides of the path of travel of the table, a crosshead provided with rigid de pending cylindrical bearings sleeved upon said posts, adjusting screws coacting with the threads in said posts and connecting to said crosshead, one of said screws being provided with a handwheel, driving connections between said screws, clamp members mounted on said crosshead to coact with said posts, a connecting rod for. said clamp members threaded at one end and provided with an adjusting nut whereby the clamp members are simultaneously actuated, a blade mounted on said crosshead for vertical adjustment thereon and with its cutting edge in approximately a vertical plane through the centers of the posts, a spring biased work pressure roller mounted on said crosshead at the rear of the blade, a vertically adjustable scoring cutter mounted in advance of said blade, and driving means for said table.

10. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a reciprocating table, adjustable shaving structure mounted over said table and comprising vertical internally threaded posts rigidly mounted on said bed at opposite sides of the path of travel of the table, a crosshead provided with cylindrical bearings sleeved upon said posts, adjusting screws coacting with the threads in said posts and connecting to said crosshead, one of said screws being provided with a handwheel, driving connections between said screws, a blade mounted on said crosshead for vertical adjustment thereon, a spring biased work pressure roller mounted on said crosshead at the rear of the blade, a vertically adjustable scoring cutter mounted in advance of said blade, and driving means for said table.

11. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocatingly mounted thereon, adjustable shaving structure mounted over said table and comprising vertical internally threaded cylindrical posts rigidly mounted on said bed at the opposite sides of the path of travel of the table, a crosshead provided with vertically extend bearings vertically adjustable on said posts, clamp means on said crosshead coacting with said posts, screws on said crosshead coacting with the threads in said posts, a blade carried by said crosshead, a work pressure roller mounted on said crosshead at the rear of the blade, and a vertically adjustable work scoring cutter mounted on said crosshead to score the work in advance of the blade.

12. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocatingly mounted thereon, adjustable shaving structure mounted over said table and comprising vertical internally threaded posts rigidly mounted on said bed at the opposite sides of the path of travel of the table, a crosshead provided with vertically extending bearings vertically adjustable on said posts, clamp means on said crosshead coacting with said posts, screws on said crosshead coacting with the threads in said posts, a blade carried by said crosshead, a

work pressure roller mounted on said crosshead at the rear of the blade, and a vertically adjustable work scoring cutter mounted on said crosshead to score the work in advance of the blade.

13. In a machine for shaving electrotype and stereotype plates and the like, having a bed member and a table reciprocatingly mounted thereon, adjustable shaving structure mounted over said table and comprising vertical internally threaded posts rigidly mounted on said bed at the opposite sides of the path of travel of the table, a crosshead provided with vertically extending bearings vertically adjustable on said posts, clamp means clampingly engageable between said crosshead and said posts, screws on said crosshead coacting with the threads in said posts, a blade carried by said crosshead, a work pressure roller mounted on said crosshead at the rear of the blade, and a vertically adjustable work scoring cutter mounted on said crosshead to score the work in advance of the blade, said bed being provided with a central chip discharge opening which is uncovered at the end of the work stroke of the table, said opening being positioned so that the chips are swept into the opening by the blade.

14. A printing plate shaving machine comprising, a bed member having a table reciprocable thereon, a crosshead member mounted on said bed member and extending across the path of travel of said table, upright tubular bearing supports rigidly secured to one of said members on opposite sides thereof, upright cylindrical bearing posts rigidly secured to the other of said members on opposite sides thereof and telescopically engaged with said bearing supports, adjusting screws rotatably and axially fixedly mounted on one of said members on opposite sides thereof, means including a chain loop rotatably drivingly connecting said screws, chain tightening means associated with said chain, threads formed on the other of said members and within said posts and receiving said screws, means for rotating said chain loop and screws, and a knife carried by said crosshead member to coact with work on said table.

15. A printing plate shaving machine comprising, a bed member having a table reciprocable thereon, a crosshead member mounted on said bed member and extending across the path of travel of said table, upright tubular bearing supports rigidly secured to one of said members on opposite sides thereof, upright cylindrical bearing posts rigidly secured to the other of said members on opposite sides thereof and telescopically engaged with said bearing supports, adjusting screws rotatably and axially fixedly mounted on one of said members on opposite sides thereof, means rotatably drivingly connecting said screws, threads formed on the other of said members and within said posts and receiving said screws, means for rotating said screws, and a knife carried by said crosshead member to coact with work on said table.

16. A printing plate shaving machine comprising, a bed member having a table reciprocable thereon, a crosshead member mounted on said bed member and extending travel of said table, upright tubular bearing sup ports rigidly secured to one of said members on opposite sides thereof, upright cylindrical bearing posts rigidly secured to the other of said mem bers on opposite sides thereof screws rotatably and axially one of said members on opposite sides thereof, means rotatably drivingly connecting said screws, threads formed on the other of said members and receiving said screws, means for rotating said screws, and a knife carried by said crosshead member to coact with work on said table.

DONALD E. SUTTON.

References Cited in the file of this patent UNITED STATES PATENTS

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