US1715013A - Matrix-forming machinery - Google Patents

Description

y 1929- E. J. SMITH 1,715,013

I I MATRIX FORMING MACHINERY Filed Feb. '7, 1927 4 sne ts-shei 2 2 t I ,WQQRS E. J. SMITH MATRIX FORMING MACHINERY May 28, 1929.

Filed F'e b. '7, 1921' 4 Sheets-Sheet" 4 Patented May 2%, EQZQO- F ERNEST JAMES SMITH, OF LONDON, ENGLAND, ASSIGNOR TO THE 6058 PRINTING PRESS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MATRIX-nonmetal" mncnmnnr.

Application filed February 7,1927. Serial No. 166,330.

My invention relates to matrix forming machinery and has for its object the provision of a new and improved form and arrangement of parts for holding a matrix underheavy pressure in contact with the .type or other form upon which the matrix has been pressed,

such maintenance under heavy pressure to Continue preferably during the drying operation. It is one of the objects of my invention to provide a construction of this type-of such power that it can be utilized to advantage for pressing a dry flong or a substantially dry fiong into the form for cutting the matrix, drying means being preferably provided in the cutting press for quickly completing the matrix. v p It is one of the objects of my invention to provide improved means in a device of this type for applying the pressure whereby the platen by which thepressure is applied may be given a quick preliminary movement into position for the application of the final operative pressure thereto. It is'one' ofthe objects of my invention to provide for this by the use of mechanically operating power means for I the preliminary movement-of the platen and hydraulic press means for the comparatively much heavier pressure at the end of the opera- 1 tive movement. To this end, it is one of the objects ofmy inventionto provide a construction and arrangement by which the platen may be free to move under the influence of .the mechanically applied power and bywhichthe application of the heavier power hydraulically may be effected promptly at the desired time and may be stopped promptly when the pressure has reached the predetermined desired maximum. v

It is another object of my invention to pro- Vide automatically acting control-means by which the pressure upon the platen may be kept at the predetermined maximum for anydesired length of time. For accomplishing thisfresult, it is one of the objects of my 'in.:

vention to provide pressure controlled means for regulating the application of power, this being brought about pref era'bly by the-use of pressure actuated means for controlling the supply of current to an electric motor by which the pressure means is operated.

' It is another object ofmy' invention topro-I vide aiconstruetion of the type above referred to in which the withdrawal of the pressure .from the matrix may be effected expeditiously in such a manner as to leave the mechanism 'ing ready for another pressing operation prompt ly upon the withdrawal of the completed matrix and the substitution, of another.

It is stillanother object of my invention to improve machines of-this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished my several objects are illustrated in scribed.- What- I consider as my invention and desire to coverby Letters Patent is set forth in the claims.

' In the drawings I Fig. 1 is a side view of the of my machine, shown more or less diagrammatically, and with certain of the parts broken away for better illustrating the construction, apart thereof being substantially a section at line 11 of Fig. 4.

Fig. 2 is a transverse vertical section through the upper. portion of the machine at one side thereof. i

Fig. 3 is a -hor 3-3 of Fig. 2;

Fig. 1 is a front view of my improved machine, with the operating god shown in section and with the bracket for such rod re? moved. I

Fig. 5is a detail view showing a portion of the parts as illustrated in Fig. 1 but with the preferred form izont al section taken atline' parts in a changed position.

the drawings and, are hereinafter specifically de- Fig. 6 is a view similar; to Fig. 1 but showa modified form of construction; and Fig. 7 is a vertical cross section through the transverse power shaft at the top of the machine. 1 1 Referringnow to Figs. 1 to 5 inclusive, in which corresponding parts are indicated by the same reference characters, 15 indicates the base of my machine which in the construction shown comprises two parts, one of such base parts being formed integrally with a cylinder lfi'rising therefrom Wit h lugs 17 extend. ingfrom its sides at the'to'p for supporting the main standards 18. Within, the cylinder 16 there is mounted a piston 19 carrying on its upper end a platen 20 which" is slidably mounted upon the standards 18'so as to be I movableup and down thereon withthe piston.

The platen 20 is; provided'on its front face with an extension 21 which is adapted to serve the standards 18 and held rigidly in position thereon, there is a heavy platen 22 toward and from which the platen 20 is movable as hereina'fter described for pressing between the platens the part 23.comprising a form and a, V ong in'contact with the form on its top face. For heating the platen 20, it is cored out, as indicated at 24, a pipe 25 being connected therewith for feeding steam thereto from any suitable source.

In theme of my machine, a form is placedin position u on the table 21 with a fiong or a partially ormed'matrix in contact with the form. The form and flong are then pushed into position between the platens and 22 and the mechanism is operated for moving the platen 20 upwardly for forcing the'form into the flong, or for applying pressure from-the form to the flong or partially cut matrixif it has already been subjected to;pressure. In my improved machine as hereinafter described, the initial operation of the machine serves to press the platen 20 upward very quickly mto approximately its final operative positon, and then a very heavy power, acting at a correspondingly slower rate, is applied for attaining 'the desired degree ofpressure between the form and the matrix. The platen 20' is held in its, elevated position for efl'ecting this pressure for the desired'periodfor completely drying the matrix, whereupon the platen 20 is again. moved downwardly and the matrix removed. 7

The means provided in the construction shownin Figs. 1 to 5 for moving the platen 2.0 upwardly.for pressing the'form between the platen 20 and the platen 22 comprises a.

. transverse shaft 26 mounted in bearings carried by standards 27 rising from the platen 22, as is best shown in Fig. 4. This shaft is l driven by a worm gear 28 which in turn is v electric motor 36 carried by the platen 22.

driven by a worm 29 o upon a longi" tudinally extending driveshaft 30. As is clearly shown in Figs. 2 and 3,1the shaft 30 is mounted in suitable-bearings in a troughlike device 31 which is equipped with antifriction bearing devices 32 at opposite ends of theworm 29 for taking the end thrust.

Upon its outer end, the shaft 30 is provided with a spro pket gear 33 connected by means of a'sprocket'cha1n-34 with a-s'procket pinion 35 mounted upon the drive shaft'of an any approved type adapted to be operated by an arm '39. In the construction shown, the switch is designed to be open 'whenthe arm .39 is moved toward the left in the position as shown in Fig.1 and isclosed for operation of themotorwhen the arm 39 is movedltjostands infcontact with a lug ward the right any approved vmanner.

The means for operating the arm 39 for opening and closing the swltch 38 comprises an operating rod 40 slidably mounted in bearings 41 rising from the platen 22. The rod '40 is flexibly connected with the arm 39' of "the switch 38 by anysuitable mechanism so that'when the rod 40 is moved toward the right in Fig. 1 the arm 39 is given an opera tive stroke for closing the switch and so that when the rod 40 is moved toward the left in said figure the switch 38 is opened. The rod.

40 is given its operative movements through I the medium of a bell-crank lever 42, one arm of which is in the form of a handle and the otherarm of which is connected with the opis pivotally mounted upon a bracket or arm 44 extending forwardly from the platen 22 for convenient actuation by an operatorstanding in front of the machine. A coiled crating rod 40 by meansof a link 43., In the construction shown the bell-crank lever 42.

spring 45 is mounted on the rod 40, bearing at one end against thestandard41 and hear-.- 'ing at its other end against the collar 46 forming a part of the means for connecting the arm39 of the switch with the rod 40. The

movement of the rod 40 toward the right for v closingthe switch must accordingly be ef- 1 fected against the action of the spring 45,

and; this spring is adapted to move therod toward the left for opening the switch when conditions are such as to permit-sucl1'-movement. v

In the construction shown, theplaten 20 is moved upwardly upon a half rotation of the shaft 26 and is moved downwardly uponthe succeeding half rotation of said shaft,- means being provided for automatically throwing the mechanism out of operation at the end of each succeeding half rotation. This cans comprises a cam 47 fixedly mounted up nthe shaft 26 in position to bear upon a trans:

versely extending arm 48 carried by a sleeve 49 revolubly mounted upon the operating a downwardly extending arm 50 which 51 mounted upon erneath the operthe platen 22 directly un The arrangement is such, that ating rod 40.

upon the rotation; of, the shaft-'26 in clock wise direction 'in' Fig. 1, the cam 47 serves to move the arm 48 downwardly for carrying the arm 50 toward the-left inFig. 2 from" 120 the position shown in solid lines. When the the position shown indotted lines therein to arm 50 is standing in the position shown in dotted lines in Fig. 2, the shaft'is held from. movement toward the left in Fig. 1. When, f

125 51, the spring 45 acts promptly to move .the rod '40 towardthe left in said Fig. 1 for opening the switch '38 whereupon the rota- Y however, the arm 50 is caused to-clear the lug tion of the parts is promptly stopped. For

effecting this prompt stoppage of the shaft rod 40. The sleeve 49'is also provided with miners 26 audits connected parts upon the opening of the switch 38,1 have provided a brake mechanism 52 of any approved form operated by an-arm 53 which has a suitable flexible connection with the operating rod 40 i (see Fig, 1) so that upon movement of'the is a plied to the shaftr30.

' shown, the handle of .the lever A2will be moved downwardly against the action of. the spring 45 serving to close the switch 38, to release the brake 52, and to move the arms 48 and 50 toward the right so that the arm 48 can engage the fiat face of the cam 47 and the arm can engage the end face of the lug'51, as is best shown in Fig; 5. As will be readily understood when the ell-crank lever .42 is then' released the rod' iO-is held from movement toward the'left in said Fig. 1 until the shaft 26 has completeda half rotation in clockwise, direction in said figure, at which time the cam 4.7 serves to release the arm 50 from the lug 51.

26 as to stop the rotation of the shaft at the time when the platen 2.0 has been moved upwardly by the shaft to the limit ofits move ment. The means provided for moving the platen 20 upwardly by power from the shaft 26 comprises eccentrics 54 at opposite sides of the machine connected by means of links 55 with the platen. As is best shown in Fig. 1, the lower end of each of the links 44 is in the form of a loop within which a bearing block 56 is slidably mounted, such'block be-. ing journaled upon a pin 57 mounted in the I platen 20. A spring 58 is mounted in each of the links below the slide block 56, serving as the means for applying the pressure from the link 55 to the .platen 2 0 through the pin and slide block. By the use of this means, when the shaft 26 is given its operative half rotation for carrying the platen 20 upwardly, the pressure is applied satisfactorily to the platen through the spring 58 regardless of any slight variations in the thickness of the form 23 being worked upon. In the arrangement described, the shaft 26 s des gned to be given its operative half rotation in a comparatively veryshort time for effecting theinitial movement of'the platen 20, such movementv preferably to consume not more than two pr three seconds.

The means for applying the final comparatively much greater effective pressure upon the platen 20 comprises means for forcing oil or other pressure fluid into the cylinder underneath the piston 19. This means comprises an oil tank 59 whichis connected with the cylinder 16 by means ofa line of piping 60, such line of piping 60 having an oil pump 61 interposed therein for forcing oil from the by means of line wires 64, such wires serving to connect the motor in series with a switch 65-and a switch 66. The switch 66' is designed to be of any suitable type comprising an operating arm 67 soarranged that the switch is closed when the arm is standing in the position as-shown in Fig. 1 and is open v when the arm 67 is given a downward stroke from the position shown in said figure. The "arm 67 of the switch extends in the construction shown between lugs 68 carried by one oft'he links 55, being so arranged that upon the upward movement of the link 55 the arm 67 is moved for closing the switch and that upon thedownward movement of the link" 55 the arm 67 is moved for opening the switch. By reason of this arrangement, the motor 63 the-upward movement of the link 55. andis automatically thrown out of operation upon the downward movement of such link.- The motor 63 is thus caused to begin operation before the end of the initial upward movement of the platen 20 and is thrown out of operation before the end of the downward movement of the platen 20.

The switch65 may also serve for stopping the operation of the motor 63 independently of the movement of the link 55. This switchis connected by means of a stem 69 with a pressure device'which nas direct connection with the interior of the cylinder 16. In the construction shown'the pressure device comprises a casing 70 connected by means of a, pipe 71 with the pipe 60. The stem 69 ex- -is automatically thrown into operation upon I tends into the casing 70 through a suitable stuffing box 72, being connected at its inner end with a piston 73 which is moved down- I wardly by the internal pressure against the action of a spring 74, means being preferably provided for regulating the tension of the. spring 74 for controlling the pressure at which the switch 65 is opened. As will be readily understood when the pressure within piston 7 3 upwardly for closing the switch 65 and thus causing the motor andpump again to operate.

Mea'ns'is also provided in'eonnection with the pump 61 and the cylinder 16 for controlling the delivery of the fluid under pres sure to the cylinder independently of the operation of the pump. This means comprises a line of piping 7 '5scrvingas a by-pass' fromthecylinder 16 to the tank 59. B the use of the pipe 75 the oil is permitte to pass directly from the cylinder 16 to the tank independentlv of the pump 61, and the oil .for'ced toward the left in Fig.1 by the pump" 61 throu h the pipe 60 is also ermittedto .return to the tank, 59 without being forced into the cylinder 16 For elosingthe pipe 75 so as to force the oilfrom the pump 61 into thecylinder, a valve 76 is interposed inthe pipe 75, the stem 77 of the valve being controlled by a rod 78 which has a telescopic connection with the stem. A spring 79 surrounding the rod 78 and the ste1n,77 serves to press'the stem' yieldingly into closing position when the rod is moved downwardly.

. When the valve 76 isthus closed, the oil from 2O upwardly.

the pump 61 is forced into the cylinder 16 beneath the piston 19 serving to force the platen The 1 means for "operating the valve 76 through the medium of the rod 78 comprises inthe construction shown a cam 80 mounted on the shaft 26 adapted by engagement with a roller 81 carried by the rod to force the rod down quickly at the end ofthe half rotation into the position as shown in Figs. 2 and 4.

For efi'ecting a quick return of the rodto its uppermost position for opening'the valve 76.

at the start of the half rotation of the shaft 26 from the position shown in said Figs. 2 and 4, a spring 81 is providedbearing on the rod and on a bearing 81" in which the rod is slidably mounted. The arrangement is movement of the platen 20 by the mechanical,

such that the valve 76 is closed just asthe means ends, ready for the movement-of such into operation through the use of the bellcrank lever 42, as soon as the link is drawn upwardly a short distance the switch 66 is closed for starting the motor 63. The pump 61 then starts to operate, drawing oil from the tank 59 and forcing ittoward the left in Fig. 1. The piston 19 is then drawnupwardmechanically through the medium of the links 55 independently of any hydraulic pres-f.

' sure within the cylinder 16, the oil being adapted to enter the cylinder 16 through" the pipe 75 and the open valve- 7 6 independently of-the pump 61.. As soon as'the shaft'26has made its half revolution so as to bring the platen 20 to the limit of its initial movement,

' the shaftis automatieally -stopped as above described and at the same time'the valve7 6 is closed .1 The pump 61 thencontinues to operate, serving now to force oil throughthe pipes and 62 into the cylinder-for forcing the piston 19 upwardly for giving the platen 20 an additional movement toward the platen- 22 at a very much slower speed and at a correspondingly very much greater efi'ective' 6' pressure. As-soon as the pressure'of the platen 20 against the platen 22 through the interposed formand' matrix 23 hasreaehed the maximum desired, the pressure controlled device serves to .open the switch 65 as above describedfor stopping the operation of the motor 63. Such stoppage may continue indefinitely by reason of the fact that the pressure'is maintained substantially constant within the cylinder 16, or on the otherhand,

vthe motor may be successively started and stopped a number of times during thev period through which it is desired to maintain the 'pressure'upon the matrix between the platens.

When the desired period of pressure at the desired degree of pressure .has expired, the belh crank lever 42 will be wardly by the operator platen 20-fdownwardly-an'd serving as above described to openthe switch 66 forthrowing themotor 63 out of operation. At the start.

again: moved downi or throwingthe' motor 36 lIltO'OPBlELtlOIl for giving the shaft 26 another half revolution for moving the] of this movement, the valve 76 is, opened for permitting the eil'to escape through the pipe.

62, the pipe 75 and the valve 76 to the tank 59, serving to permitithe platen 20 and its connected parts. to descend quickly: by gravity so-as to be ready forthe successive operation.

loo

1 By the use of this improvedmeehanism, the

desired heavy pressure can be applied upon the platen 20 at the end of the operative f movement of the platen. At the same'time,

thplaten 20 can be moved upwardly through the initial portion of its stroke 'at a comparatively rapid rate of movement wherebya very considerable amount of time is saved in the operation of the device. By the arrangement of valvesand controls, the apparatus for giving the final operative movementtothe platen 20 is in operation before the end of the initial movement of the platen so that no time whatever is lost at any stage of the operation. s

Referrin now to Figs. 6 and 7 which show a modified orm or construction, the arrangeoperative stroke of the piston by which the .ment and construction are substantially the same except with respect to the means for actuating the piston and for controlling the platen-is given its final'operative movement. 1

In this construction the parts are indicated by the same reference characters as those indicated above to the extent that the-construe tion is the same. r

In the construction of- Figs. 6-and. 7, a single motor 82 is provided for giving the platen both its initial quick movement and upon its final operative movement toward the platen 22. This motor 82 is connected with .the shaft 26 through the medium of a shaft 30,.a worm 29 and a worm gear 28, but the worm 29 is connected with "the shaft 30 through the medium of a sleeve 83 and a clutch 84 rather than being connected directly as in the construction before described. The movable member of the clutch .84 is moved into and out of operative clutching engagement by means of a lever 85 pivotally mounted between the shaft 30 and the operating rod 40, such lever 85 having a flexible con nection with the rod and the-clutch so as to throw the clutch into engagement when the rod 40 is moved'toward the right in Fig.

6. The slow movement driving mechanism is connected with the motor 82 through the medium of a sprocket chain 86 connecting sprockets 87 and 88 mounted respectively the shaft 30 and the shaft of the pump 61. f

By the provision of the clutch 84 in thereonnectionsbetween the motor '82and the shaft 26, I am enabled to stop the rotation of the i shaft 26 without stopping the motor 82 so that the motor can continue to drive the pump 61 after the 'shaft' 26 has been stopped at the end of its half revolution. v v For controlling the motor 82, I have provideda system'of line wires 89 leading from any suitable source of electrical energy and connecting the motor 82 in series with the switch 38-. A second'switch is connected .in

parallel with the switch '38, such connection being effected by line-wires 90. This second. switch in parallel with the switch 38 is in the form of a commutator comprising a brass. plate 91 and a'fiber'plate 92 mounted upon the shaft 26, brushes 93 being. arranged to bridge across the plate 91 when the shaft 26 I i is in'the positionfor holding the platen 20 in its uppermost position. Thus, when the switch 38 is opened at the end of the half rotation of the shaft 26 by which the platen 20 is raised to its operative pressure position,

the commutator switch is effective for continuing the circuit through the motor 82.

' When, however, the shaft 26 has been given its successivehalf rotation for-moving the platen 2O downwardly out of. operative pressureposition, the fiber plate 92is then in position for engaging the brushes 93 and the a by-pass between the pipe and thetank 59 adaptedto permit the oil to return to the tank k 59 rather than to be forced into the cylinder 16 when the pressure has reached the desired maximum. For regulating the pressure at which this by-pass action shall take place, the

valve 94 is made adjustable, such valve being 7 ofany approved type such as is well known in the ar "When the form is placed in position be-* tween the platens 20 and 22, the motor 82 is started in the manner above describedin conthe operating. rod 40 toward the right in Fig. 6, serving to close the clutch84 for shaft 26 a half rotation, such shaft being thrown out of rotation at the end of the half revolution against the action of the spring 45 by the use of a cam 47 and cooperating mechanism as above described in connection with nection with the motor 36, by a movement of giving the the other device. When the shaft, 26 has reached the position-as shown in Fig. 7, in which, position the operating rod 40'is permittedto move toward the left in Fig. 6, the

clutch 84 is opened. At the same time the switch 38 is opened, but the motor 82 con-' tinues to operate by reason of the provision of the switch as shown in Fig. 7 which isthen in the position as there shown. The pump 61 will, of course, havestarted operation at the same time when themotor 82 started, the oil taken from the tank' 59 being permitted to pass intothe cylinder16 along with a much greater supply of oil' passing at the same time into the cylinder through the pipe 75 and" the valve 76 as the piston 19 is moved up-; Wardly mechanical means through the ac tion of the links 55. When the valve 76 closes at the. end of the initial upward movement of the platen 20, the pump is by such closure of the valve 76 rendered effective for forcing the oil into the cylinder beneath the piston for giving the platen 20 its final operative movement toward the platen 22 in the manner before described. When the pressur has reached the desired maximum, the relie valve '94 operates; When the pressure has been maintained for the desired period of time against the form and matrix 23, the lever 42"is again moved downwardly serving'by the succeeding. half revolution of the shaft 26 to restore the parts to their initial positions.

j While the drawings show the topplaten held stationary and the bottom platen only movable, with the motor and its cooperating stood that the invention is not limited to this construction, except as it may be solilnited with respect to certain of the claimssince some other arrangement might well be. enrployed. "Moreover, while the form-of con'-. struction in other respects as illustrated is: preferred, it is to be understood that the-in 'means located'above the platens for applying power mechanically thereto, itwill be under-.

vention is not to be limited to the form as shown exceptso far as the claims are'speci cally so limited,- since it will be evident that changes might well be made in the construction without departing from the invention.

I claim .7

1-. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and from said first named platen, a shaft revolubly mounted on .said

for applying a heavy pressure thereon.

I 2; In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and away from said first named platen, a shaft reanlnp l mounted on said frame, means for drivln saidshaft, means actuated by a half rotation of said shaft for giving said secondplat-en a predetermined initial movement toward said first named platen, automatically operating means for sto ping the rotation of .said shaft at the en of each half rotation-thereof, and other means of comparatively much greater effective power adapted automatically at the end of the initial movement of the secondplaten to give said second platen an additional movement toward said first'namedplaten for applying a heavy pressure thereon.

3. In a matrix forming machine, the com-- bination of a frame, a platen mounted on said frame, a second platen movable toward and from said first named platen, mechanically operated power meansadapted on an opera- '-tive stroke in one ireetion to apply pressure on said second platen for giving it a quick initial movement toward said first named platen and adapted on a stroke in the opposite directionyery quickly to relieve said pressure, and hydraulically operated power means adapted after the initial movement.

of said second'platen-oto give it an additional movement by the application of much heavier 7 pressure thereto.

, 4..In'a.matr1x forming machine, thecom bination' of a frame, a platen mounted-ion said frame, a'seepnd platen movable toward and from said first-named platen, mechanitermined movement of the platen thereby,

cally' operated power means forgiving said 'second"pla ten a quick initial movement toward said-first named platen, mechanically. (l0.-

operated means for throwing said r power meansout of operation atthe endof a. prede- 1 hydraulic power meansfor giving said second-platen its final movement serving to apply heavy pressure on 'said first named platen, and automatically operating means for throwing said hydraulic power means into operation before "said mechanical power means is thrown out of operation.

5. In a matrix forming machine, the'combinationof a frame, a platen mounted on said frame, a second platen movable on said frame toward and from: said first named platen, a shaft revolubly mounted on said frame, links mounted eccentrically on said shaft and connected with said second platen adapted by the rotation of the shaft to move said second platen toward said first named platen, and other power means for applying a heavy final pressure from said'second platen to said first named platen. said second platen being movable to alimited extent towardsaid first named platen with respect to said links.

6. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and from said first named platen, a shaft revolubly mounted on said frame, links mounted eccentric'ally on said shaft, connections between said links and said second platen for moving the platen toward said first named platen and arranged to permit said second platen to move said first named platen independently of the links, and other power means for applying a heavy final pressure from said second platen to said first named platen.

v 7. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and from said first named platen, a shaft revolubly mounted on said frame, links mounted eccentric-ally on said shaft, connections between said links and said second to a limited extent toward I platen for moving the platen toward said first named platen Iand arranged to permit said second platen to move to a limited extent toward said first named platen independently of the links, and other power means acting directly upon said second platen independently of said links for applying a heavy final pressure on said second platen toward said bination of a frame, a platen mounted on said frame,-a second platen movable on said frame toward and from said first named platen, a shaftrevolubly mounted on said frame, links mounted ecccntrically on said shaft, connections tb'etween said links and 8. In a matrix forming machine, the comsaid second platen for moving the platen toward said first named platen afid arranged to permit said second platen to move to a limited extent toward said first named platen .in-

dependently. of the links, and hydraulic power means for'applyingaheavy final pressurejdirectly on said second; platen independentlyobsaid links. I 9. In a matrix forming machine, nation of a frame, a platen mounted on said the combi frame, a second platen movable on said frame toward and from said first named platen, a

shaft revolubly mounted on said fra'me,-linlts mounted eccentrically on said shaft, connectlons between said llnks and said second platen for moving the platen toward said to press on said second 'platen toward said first named platen, and pressure means for operating said piston. I

10. In a matrix forming machine,-the combination of a frame, a-platen mounted on said frame, a sec'ond platen movable on said frame toward and from said first named platen, a

' shaft revolubly mounted onsaid frame, links mounted eccentrically on said shaft, eonnections between said links and said second platen for moving the platen toward said first named platen and arranged to permit said second rplaten to move to'a limited extent toward said first namedplaten independently of the links, a cylinder mounted on said frame,'a piston in said cylinder and rigidly connected with said second platen, and, pressure means for operating said. piston.

11. In a matrix forming machine, the-combin'ationlof a frame, a platen monntedon said frame, a second platen movable on said frame toward and away from said first named platen, a shaft revolubly mounted on saidrame,'means for driving said shaft, means actuated by a half rotation'of said shaft for giving said second platen a predetermined.

initial movement toward said-first named platen and adapted by the succeeding half rotation of the shaft to release saidse'cond platen for movement away. from the first named platen, manually operated means for starting the rotation of said shaft, automatically operated means for stopping the rotation of the shaft atthe endof each half rotation thereof, other means of comparatively much greater power for giving saidsecond platen its final movement for applying heayy pressure on said first named platen, and means aetuated'by the movement of said first named power meansfor throwing said second named power means into and out of operation.

12, In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and away} from said --first name'd' platen, a shaft1'. revoli1bly mounted on said" rame, means for drivingsaid shaft, .means actuated by ahalf rotation of saidShaftfOf. giving said second platen a predeterminedinitial movement toward .said first namedplaten and-adapted by the succeeding half rotation of the shaft to release said second platen for movement .away from the first namedplaten, manually operated means for starting; the rotation of said shaft, a'utoniati- I 'cally operated means for stoppingtherotation of the shaft atthe end of each half rotation thereof, hydraulic power nieans adapted to act directly upon said second platen for giving it its final movement for applying heavy'pressure 011 said first named platen,

and means'actuated by the movement of said] I first named power means for throwing said hydraulic ti0n...,

13'. In a matrix forming machine, the combination ofa frame, a platen mounted-on said frame, a second platen movable on said frame toward and away from said ,firstnamed' platpower means into and out of opera en, a shaft revolubly mounted on said frame,

means for driving said'shaft, means actuated by a'half rotatipn of said shaft for giving said second platen a predetermined initial movement toward said first named platenand adapted bytlie succeeding half rotation ofthe shaft to'release said second platen for movement away from the first named platen, manually operatedmeans for starting the rotation of said shaft, automatically operated means for stopping the rotation of the shaft at the end of each half rotation thereof, hy-

draulic power means ada'pted'to act directly upon saidsecond platen for giving it its final movement for applying heavypressure on said first named platen, and means adapted upon the movenientpf said second platentoward said first mamed platen to throw said hydraulicpower means into/ operation'and adapted upon the movement of the second platen awayfrom thefirst named platen to throw said hydraulie power means out of operation.

. 14;. In a matrix forming machine, theScoinbination of a frame, a'platen mounted on said frame, a second platen movable on said frame toward and-away from said first named platen, a motor, means driven by the motor for moving said second platen toward said first named platen for applying pressure on said first-named platen, a second motor, meansllQ driven by s'aidsecond motor forapplying comparatively much greater effective power on said second platen for pressing'on said first'named platen, andmeans adapted automatically to-start said second motor into .op'

eration before said platen reaches the end of named motor.

15. In a matrix forming mach ne, the combination of a frame, a platen'mounted on said frame, a second platenamovable on said frame; toward and away from said-first named platen,- 'a motor, means driven'by the motor for moving'said second platen its stroke under the influence of said first trio motor c'ennected with said hydraulic power means for driving'it, a switch arr'anged'in the electrical connections for said electric motor, and means adapted automatieally to close said switch for starting the second motor before said second platen reaches the end of its stroke under the influenceof said first named motor. a

16. In amatrix forming machine, the com bina'tion ofa frame, a platen mounted on said frame, a second platen movable on said frame toward and away from'said first named'platen, a motor, means driven by the motor for moving said second platen towai'd said first named platen for applying pressure on said first named platen, a second motor, hydraulic power means driven bysaid second motor for applying comparatively much greater power on said second platen for pressing on said first named platen, means for starting said second motor into operation before said second platen reaches the end of its stroke under the influence of said first named motor, and means controlled by the pressure devel-- oped by said hydraulic power means for stopping and starting said second motor for keeping the pressure within certain predetermined v limits.

' 17. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable onsaid frame toward and away from said first named plat-en, a motor, means driven by the motor for moving said second platen toward saidfirst'named platen for applying pressure on .said first named platen, hydraulic power means for applying comparatively much j-. greater power on sald second platen for pressing on said first named platen, an electric motor connected with said hydraulic power means for drivingit, a switch arranged 1n the electrical connections for said electric motor, means for closing said switch for starting the second motor before said second platen reaches the end of its stroke under the influence of said firstnamed motor, a second i V switch'in the electrical connections of said electric motor, and means controlled by the pressure developed by said hydraulic power means for opening andclosing said second switch for keeping the pressure within certain predetermined limits;

18. In a matrix forming machine. the combination of-a frame, a platen mounted on said frame, asecondplaten movable on said frame 7 toward and away from said first named platen, means for giving the second platen an initial movement toward said first named platen, a cylinder on said frame, apist-on in said cylinder for giving said'second platen an ad ditional movement toward said first named platen; for-applying aheavy pressure there-i on. a tank. a pipe leading from sai'd'tank to said cylinder-.a pump interposed in said pipe between the tank and the cylinder, a second 19. In a matrix fermingmachine, the combination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and away from said first named platen,- power means for giving said second platen apredetermined initial movement to' ward said first 'named platen, hydraulic power means for applying a heavy final pressure from said second platen to the first named platen, a valve by the closing of which said hydraulic power means 1s made effective on said second platen, and means'ac-.

tuat'ed by'the movement of said first named power means for closin said valve before said second platen reaches the end -of its operative stroke under the influence of said first named power means.

" 20. In a matrix forming machine, the com- :bination of a frame, a platen mounted on said frame, a second platen movable on said frame toward and away from said first named platen. means forgiving the second platen an initial movement toward said first named platen, a cylinder on said frame, a piston in said cylinder forgiving saidsecond platen an additional movement toward said 'first -named platen for a plying a heavy pressure thereon, a .valve by he closing ofwhich said piston is made effective for movingsaid sec ond platen, and means controlled by the operation of said first named. power means" for moving sald second platen toward said first named platen adapted to close said valve.

21. Ina matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable toward and from said first named platen.- means for giving'said second platen 'a quick initial movement toward said first named platen.

hydraulic power means for giving said second platen its final movement serving to applyheavy pressure on said first named platem, and means controlled by the pressure for regulating the operation of said hydraulic power I means.

22, Ina matrix forming machine, the com-'- 'bination of a frame, a platen mounted on said 3 frame, a second platen movable toward and fromgsa'id first'named platen, means forgiving said second platenaquick initial move: Inent toward said first named platen, hydrau- Y Y 11c power means for giving said secondplat- 1 en itsfinal movement serving to applyheavy pressure on said first named platen, and means controlled by the pressure for throwing said hydraulic power means out of operation.

23. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platenmovable toward and from said first named platen, means for giving said second platen a quick initial movement toward said first named platen, hydraulic power means for giving said second platen its final movement serving to apply heavy pressure on said first named platen, and means controlled by the pressure for throwing said hydraulic power means successively into and out of operation for maintaining a certain predetermined pressure between said platens.

24. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable toward and from said first named platen, means for giving said second platen a quick initial movement toward said first named platen, hydraulic power means for giving said second platen its final movement serving to apply heavy pressure on said first named platen,

a motor for driving said hydraulic power means, and means controlled by the pressure between said platens for starting and stop-.

ping said motor for maintaining a predetermined pressure.

25. In a matrix formingmachine', the combination of a frame, a platen mounted on said frame, a second platen movable toward and from said first named platen, power means for giving said second platen a quick initial movement toward'said first named platen, means for throwing said power means out of operation at the end of a predetermined move ment of the platen thereby, other power means for giving said second platen its final movement toward said first named platen for applying heavy pressure thereon, and automatically operating means for throwing said second'named powermeans into operation before the end of'the operation of said first named power means.

26. In a matrix forming machine, the combination of a frame, a platen mounted on said frame, a second platen movable toward and from said named platen, a reciprocatory member, power means for driving said member alternately in opposite directlons, means adapted upon a stroke of said member in one direction to apply pressure on said second platen for giving it a quick initial movement toward said first named platen and adapted upon a stroke in the opposite'direc tion very quickly to relieve said pressure, and other power means adapted after the initial quick movement of said platen to give said platen an additional movement in the same direction by the applicationof comparatively much heavier pressure thereto.

27 In a matrix forming machine, the combination of a frame, a platen mounted on said.

frame, a second platen movable toward and from said first named platen, a reciprocatory member, power means for driving said member alternately in opposite directions, means adapted upon a stroke of said member in one direction to apply pressure on said second platen forgiving it a quick initial movement toward said first named platen and adapted upon a stroke in the opposite direction very quickly to relieve said pressure, and other power means thrown automatically into operation at substantially the end of the operative 7 stroke of said first named power means for applying comparatively much heavier pressure to said second platen for completing its movement. I

bination of a frame, a platen mounted on said frame, a second platen movable toward and from said first named platen, a reciprocatory member, power means for drlvlng said inemplaten for giving it a quick initial movement v toward said first named platen and adapted 28. In a matrix forming machine, the comupon a stroke in the opposite direction very quickly to relieve said pressure, an electric motor, means driven by said motor for applying comparatively much heavier pressure to said platen for completing its movement, and automatically operating means for throwing said motor into operation at substantlally the end of the operative stroke of said first named power means.

ERNEST JAMES SMITH.

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