US1220059A - Vania - Google Patents

Description

L S. BANCROFT & M. C. INDAHL.

CASIING MACHINE FOR ELEMENTSVOF PRINTING FORMS APPLICATION FILED JULY 20, 1916- mmam,

Patented Mar. 20, 1917.

6 SHEETS -SHEET I.

J. S'. BANCROFT & M. C. INDAHL.

GASTING. MACHINEFOR ELEMENTS 0F PRINTING FORMS.

APPLICATION FILED JULY 20,1916- Patented Mar. 20, 1917.

5 SHEETSSI'IEET 2- I I amvemto zs J. S. BANCROFT & M C. ENDAHL.

CASTING MACHINE FOR ELEMENIS 0F PRINTING FORMS.

AFPLSCATION FILED JULY 20, i9I6.

Patented Mar. 20,1917.

6 SHEETS-SHEET 3.

ZZMM 1. 8. BANCROFT & M. C. INDAHL CASTING MACHINE FOR ELEMENTS 0F PRINTING FORM S.

APPLICATION FlLED JULY 20,19l6- Patented Mar. 20, 1917.

6 SHEETS-SHEET 4- ZMZ '1 s. BANCROFT & M. c. INDAHL. CASTING MACHINE FOR ELEMENTS 0F PRINTING FORMS.-

I APPLICATION FILED .IULYZOI 1916 1,220,059 PatentedMan 20,1917.

6 SHEETS-SHEE T 5- 7w 4 A Tram/Er;

J. S. BANCROFT & M. C. INDAHL.

CASTING MACHINE FOR ELEMENTS OF PRIN'HNG FORMS.

APPLICATION FILED JULY 20. 191E- 1 20,059 Pafiented Mar. 20, 1917.

a SHEETS-SHEET s.

I I a,

- UNITED STATES PATENT OFFICE.

J'OHH SELLERS BANCROFT AND MAURITZ C. INDAHL; 0F PHILADELPHIA, PENNSYL- VANIA, ASSIGNORS TO LANSTON MONOTYPE MACHINE COMPANY. OF PHILADEL- PHIAQIPENNSYLVANIA, A CORPORATION OF VIRGINIA.

CASTING-MACHINE ron ELEMENTS or rnmrmeironms.

Specification of Letters Patent.

Patented Mar. 20, 1917.

Application filed July 20, 1916. Serial No. 110,360.

Be it known that we, JOHN SELLERS BAN- CROFT and MAURITZ (J. INDA'I'IL, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Casting-Machines for Elements of Printing-Forms; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying draw- To all av gqmimay concern ings forming part of this. specification.

One of the modern developments in the type casting machine art has been a'ma'chine or an attachment for a machine whereby strips of type metal may be cast in succeeding increments fused together, such strips being adapted to form leads, rules, tie-up strips, etc., and while it has been found practical and the machine has gone into extensive public use for the production of elements for the printing form, where the edgeof the strip does not form a printing surface as well as where the edge of the strip is a simple continuous printing edge, or se ries of printing edges, difiiculty has been encountered in providing a machine which will form a strip of the character mentioned having an ornamental, discontinuous or varied printing surface.

It is one of the objects of the present in- I vention to provide an apparatus adapted for the production of rules or borders having a printed surface of any desired character and to provide means whereby the character of the printing surface maybe changed at will, or in accordance with a predetermined design during the operation of the machine, thus permitting of the production of rules or borders having a multiplicity of design characteristics, especially designs which are composed of parts periodically repeated in a certain order-or sequence. Other objects of the invention are to provide improved and simplified mechanism, whereby the resultant strips are made more uniform and accurate and'their', production 'a matter of automatic machine work requiring but; littleor no attention on the p'art' 'of the operator.

The invention has been developed in its practical embodiment as a part of the well known type. casting machine, manufactured and marketed by the Lanston Monotype Machine (10., and is illustrated in the accom- .machine such as specified, with the present improvements incorporated therein.

Fig. 2 is a view .looking at a portion of the front of the machine, or from a point of view to the right of Fig. 1 this view being on an enlarged scale.

Fig. 3 is a view corresponding to Fig. 2, but showing another portion of the machine.

Fig. 4 is a perspective view showing the cross heads for the matrix clamping mechanism and centering pin.- r

Fig. 5 is a sectional view with parts broken away showing the arrangement of a series of matrices mounted to move transversely of the mold cavity.

Fig. 6 is a sectional view in. a Vertical plane substantially at right angles to the plane of the section of Fig. 5.

Fig. 7 is a detail perspective viewshowing the knife for trimming off the metal which discharges through the vent opening and the friction clamp or brake for holding the strip in the position to which it is moved by the feeding mechanism.

Fig. 8 is a sectional view through the parts shown in Fig. 7.

Fig; 'Qfis a sectional elevation showing the construction of the operating plunger for the centering pin and matrix clamping mechanism. c

' F ig. 10 is a transverse section in a plane .indicated by the line 10--10, Fi 9.

ed to the mold blade 27.

with this apparatus, these views being on an enlarged scale, inasmuch as the actual size of the rules will correspond in width to the height of ordinary printing type and in thickness to the desired point size. 7

Fig. 13 is a perspective view of the matrix carrier having a series of matrices therein, the carrier and matrices being in mverted position.

Like reference characters in the several figures indicate the same parts.

In the adaptation of the casting machlne for casting leads and rules now in general use and which is set forth in a preferred embodiment 'in an application for patent filed by Amos L. Knight, Serial No. 864,894,

filed October 3, 1914, the successive increments which go to form the strip are cast in a mold, one wall of which is formed'bya:

mold blade and "another wall of which is formed by the metal previously congealed in the mold. Generally speaking, the mold blade operates at substantially right angles to the line of operation of the mold blade in the ordinary type caster; in other words, it is located substantially in the position ordinarily occupied by the movable cross block.

The strip is ejected or fed forwardly by the advance of the mold blade, the mold blade retreats, a new charge of metal is injected into the mold, congealstherein and uniting to the previously congealed portion and is in turn advanced or fed forwardly by the next movement of the mold blade. These operations are well understood and need no further description herein, save that in the the casing 249 of a spring box of well known constructlon.

The plunger or inner member 250 of the spring box is connected with the upper end of another lever 251, also pivoted to a fixed part of themachine frame and at its lower end j ointedto the rear end of the connecting rod 35 which extends forwardly and is joint- As it will be seen in Figs. 2'and 6, the mold blade is adapted to reciprocate in a mold 28, the construction of which it, is not necessary to describe in detail herein, further than to say that it embodies a base, side blocks 33 and 34 between which the mold blade reciprocates, and is open on two sides; that is to say, at the side opposite the front edge of the'mold blade and at the top, where friction means are provided for imposing acertain degree .of resistance to the forward movement of the strip and for retaining the strip in the position to which it may be fed.

The friction device or brake, as it may be called, is illustrated in detail in Figs. 7 and 8, and by reference to these figures it will be seen that the metal strip issuing from the mold passes between the inner face of the diagonally arranged knife 29 and the outer face of the spring pressed clamp 30. The clamp 30 is suitably guided in the mold base and is advanced by a spring 31. Its ad- Vance movement is limited by an adjustable stop or set screw 32, and in operation it serves to press the metal strip against the inner face of the knife, thereby performing a double function; that is to say, it serves to retain the strip in position against accidental longitudinal displacement and itservesto hold the side of the strip against the face of the knife so that the metal which ordinarily escapes through the air vent passage in the mold will be cleanly severed and the side of the strip left perfectly smooth.

Metal is injected by means of the ordinary metal pump mechanism through a nozzle at the bottom of the mold cavity, as shown in Figs. 5 and 6, but previous to the injection of metal a matrix is clam ed down on top of the mold in position to orm the top wall of the cavity. This matrix overlaps the mold blade and a portion of the metal which was previously congealed in the mold cavity but which has been advanced or fed forward by the mold blade.

' In accordance with the present invention,

the matrix is adapted to be moved toward and from the mold in order to accomplish two important results. By raising and low ering the matrix it becomes possible to form a printing surface on the edge of thestrip which is composed of recurrent patterns and either continuous or discontinuous, for dur; ing the casting operation the matrix will be clamped in position and. during the feeding of the strip the matrix will be lifted so that i the strip may be fed forward without interference and without injury to the printing surface. Furthermore, should it be desired to cast strips with various designs for the rinting surface this may be accomplished y providing for the use of a series of matricesany one of which may be brought into position for being clamped to the top of the mold during the casting operation, and bythe provision of a number of dilferent matrices the pattern of the printing surface may be varied almost indefinitely, as each matrix may be cut to form a portion only of the design to be embodied in the complete printing surface Examples of border, designs are shown in Figs. 11 and 12.

. 44 through which rods 45 extend from the Interposed To support the matrices and bring them into proper position for cotiperation with the mold they are mounted in a carrier 40 which is conveniently supportedin guideways 41 attached to or formed on the under side of ahead42. The head 42 is supported from a bridge 43 which substantially -corre sponds to the bridge employed on thetype casting. machines before referred to. The said bridge is provided with sleeve bearings head '42 to a cross head 46. springs 47'surrounding the sleeve bearings serve to hold the cross head and matrix carrier head. with the matrix carrier elevated and to permit of the same bein depressed to bring the desire? matrix into proper relation withthe mold for casting;

I The matrices 48 in some respects may re-v semble the matrices used in t )e castm that is to say, they have the desired cavity or caYities'in theirlower faces and in their upper faces they are provided with conical cavities 49 for the reception .of thecentering pin- 50, and they are preferably mountedin the carrier bymeans which will permit of their being accurately centered, and at the same time readily changed should it be desired to change the pattern ofthe printing surface .on the strip. Conveniently, eachmatrix is-mounted'in its own cavity or cell m'the matrix carrier and the" whole series of matrices is held in place by a pair of. pins 51 projecting from a head 52 and adapted to extend through registering openings in -.the matrices and walls of the-cells, aswill be readily understood from an inspection of- .Figs. 6', and 13. The retaining pins are held in place against accidental release by an ordinary spring retainer 53 cross head 57 (Fig. 4). Interposed springs (Fig. 13) secured to the carrier. Thecentering pin 50 is guided in a centering pin chuck 54 of standard construction, and at its upper end is connected with across head connected by loose rods 56 with an upper 58 on the rods 56 serve to depress the cen-.

tering pin when the upper cross head 57 is moved downwardly, and for the purpose of periodically moving the cross heads 57 of the centering'pin and 46 of the matrix head downwardly the cross head 57 is provided with a central plunger '59, adjustably associated therewith through anadjusting nut '60, and at its lower end this plunger 59 is provided with a head 61 upon which the forwardend of the usual centering pin actuating lever 61 is adapted to exert a downward pressure wheneversaid lever is moved in the proper direction by means of the usual operating cams on the power shafts of the machine. This lever 61 and its acperiodically movement.

tuating mechanism are of standard 0on struction and need not be further described,

as they are Well understood by those skilled in the art.

The plunger 59 (Fig. 9)' passes through the cross head 46 and issur'rounded by -a sleeve 62 having at its-upper end adjusting nuts 63 and an internal shoulder 64 for 00- I operation with a shoulder on the plunger "for limiting the relative movement of. the

plunger and sleeve. A s ring 65 surrounding theplunge'r interme iate the crosshead 57 and sleeve serves to depress the latter when the plunger'is depressed, andby the engagement of the lock nuts 63 with the cross head 46 the latter, together with the matrix carrier headwill be depressed,ther e being a proper-range of independent movement by reason of the sleeve 62 slid-in in the cross head 46 to permit of the althustment of the parts in such wise-that the cen: tering pin may be brought to its seat armeproper time. for centering the matrix, preliminary to the final clamping action "on the upper face of the mold.

The lower end of away on opposite sides so as to form depending fingers 66 and provision is made for adjusting the sleeve angularly about the plunger and holding. it in such adjusted position by means 1015 a spring pressed pin 67 ,(Fig'. 10), whereby, when desired; the

end of theoperating lt-ZWQI' 61 may be caused to'engage said fingers and so elevate the centering pin, or w to the other position, the said lever 61 may move upwardly leaving the-centering pin.

within its centering cavity in the matrix. The latter operation is desirable under circumstances where the same matrixjis to be used for the makingof a large number. of

Icasts, but where'the matrix is'to he shifted or new matrices brought into p0s1tion',.the-, :cen'tering pin must be withdrawn from said centering cavity top'ermit of the necessary To insure ,the lifting of the cross head 46 and matrix head 42, together with the matrix carrier under'all circumstances, an adjustable stop or shoulder in the form of a set screw 68 is rovided on the said cross head 46 in position to coiiperate with the top of the lever 61-, as the latter reaches the upper extreme of. its movement. Thus,

should the fingers '66 be out of positiontoco6perate-with the lever 61 and the matrix head and carrier stick for any reason, the

movement of the operating lever 61 will in-, sure the lifting of the matrix before the advance of the moldblade and feeding of the strip takes place.

Obviously, when printing surfaces are bemg formed, the pattern of which embodies match ng parts of a design, the several parts being in different matrices, extreme accuracy en the sleeve is turned is necessary in order that a proper mating of the edges will occur so as to leave no blem ish in the print. Fpr this reason it is im:

portant that accurate means shall be pro-- mold blade is advanced to a definite point which may be determined by any suitable fixed stop or by the forward throw of the actuating mechanism, but the return movement is regulated by a stop mechanism hav ing a micrometer adjustment, whereby the length of each cast increment of the strip a may be regulated with the greatest accuracy.

Th s step mechanism is illustrated in Fig. 2 of the drawings, by reference to which figure it will be seen that a tapering orwedgeshaped abutment is located in position to form a stop for the rear end of the mold blade 27 The wedge or stop abutment is mounted in an inclined position whereby its stop face will be vertical and its adjustment seen in Flgs. 1, 2 and5, the mold base 28 is is efi'ected by a micrometer screw 71 controlledby the milled'end 72, which l'atter'is heldin adjusted positionby a spring detent 73. With this arrangement the direct adjustment by the micrometer screw, is efiectedthrough the wedge or tapering surfaces. .of the stop 'in acting upon the mold blade and consequently the adjustment may be made.

with the utmost accuracy and with the finest fracti'onalmeasurement, so that it becomesentirely practical to adjust the mold blade to secure the absolute matching or mating. of

different portions of a pattern which it is desued to have Incorporated in the printing surface of the strip.

'The machine is designed to perform its functions of casting succeeding increments of the strip automatically, and it is, 'there-. fore, 'necessary to'pro'vide means' for auto-.

matically. shifting the matrices when the pattern of a printing. surface is to be. composed. of designs, portions of which are found in the different matrices. The, well known machine for casting type to whichthe embodiment ofthe invention illustrated is applied embodies means for shifting a-.ma' trix carrier or die case from one position to another under the control or direction of a record strip or ribbon. The ordinary mechanism found in the machine for shifting the matrix carrier or die case' in one direction is utilizedfor shifting the matrix carrier the present invention. Referring particu larly to Figs. 1 and 5 it will be seen that the.

embodying the sets of tongs 76 and" 77, thepin jaws 78, and air pins 79 which are adept:

motion to the die.

ed to be blown up to form stops for the pin .jaws. The air pins are blown up or projected under the control of a paper record strip The centering pin lever 61, besides center-- ing the matrix and clampingthe same down on to "of the mold, is adapted to perform an sure or clamping action through suitable mechanism on one of the blocks forming the 'side'of the mold itself. This action is de' sirable inasmuch as the mold pressure should provided with a clamping screw 80 which clamping screw passes through a nut 81 mounted in the mold base, the end of the screw being adapted to bear against the out-.

side of the block 34. As a convenient detail of construction the nut 81 is provided with a square head 82 located in the mold base, and the body of the nut rojects through an opening in saidbase; he outer end of'the screw is provided with an adjustable arm 83 Fig. 2) to the end of which is jointed a connectlng rod 84 extending upwardly and through the end of a supplemental lever 85 carried by the centering .pin lever 61. Surrounding the connecting rod 84= is a coil spring 86 through which the downward pressure of the operating lever is transmitted to the .arm'83 and screw 80", As a result of this arrangement, at the time when the matrix is centered and clamped the screw 80 is also [turned in; direction toexert a pressure on .the side block 34'and when the matrix is lifted preliminary to the forward movement of the mold blade," such pressure is relieved and the strip may feed forwardly without danger of defo'r'mation and without material frictional resistance in the mold itself.

In-connection with thefeed movement of thestrip it may be remarked that it is quite important that-the strip should be held down or prevented from rim'ng at the rear end, and

practice has-demonstrated that this result can best1be'. accomplished by forminthe mold blade with a shoulder or over ang preferably located near the upper edge. his overhang is indicated at 87 in Fig. 6 on a somewhat exaggerated scale, inasmuch as practice has shown that anoverhang of five-thousandths of aninch is suificient to accomplish the desired end.

In operation, the molten metal is inject additional function in that itv exerts a pres-' ed at the bottom of the mold cavity by the usual pump mechanism and after the injected metal has congealed, the matrix is I lifted and the mold blade advances, pushing terminate with "the resentarrangement g surface may be varied at will 4' the print the congealed metal in front of it. When the mold blade again recedes, it leaves an open space constituting the mold cavity, and,

preliminary to. the next casting operation, the proper matrix is centered over the mold and clamped'in position, whereupon more molten metal is injected and the operations are repeated the number of times necessary for theproduction of a strip of the desired length. The strip is usually one of indeered bysuitable shearing mechanism and the pattern of under the control of the record strip or ribbon b the shifting of the matrix carrier so asto ring one or the other of the matrices into position for cooperating with the mold.-

It is, of course, necessary that each matrix should overlap to some extent the congealed section of the metal forming one wall of the'mold cavity as well as the for-, Ward end of the mold blade itself, inasmuch as suchoverlapping forms the most convenient and. certain means for making a tight joint at these points and insuring the proper mating of-the 'upper edge surfaces of the several sections which together form the completed strip. I

- What'is claimed is:

1. An apparatus for casting type metal elements for printing forms, embodying means for confining a body of molten metal ,in contact with a surface of a, previously congealed portion of the element being cast whereby the two portions-are caused to unite by fusion, means for intermittently advancing the element as succeeding increments 'congeal', means for feeding molten metal and means for forming a printing surface on the element comprising a matrix, and means for periodically lifting said matrix during the advance movements ofthe 3 element.

2. a paratus for casting type metal elements or printing forms embodying a mold having a cavity open on two sides, means for holding congealed inetal in position toz -elose one side of the cavity, a movable matrix for closing the other side of the cavity, means for lifting the matrix away from the congealed metal, means for advancing-thecongealed metal while the matrix is lifted, and meansffor supplying molten metal to the cavity.

3. An. a 'paratus for casting type metal elements or printing forms embodying a mold having a cavity open at two sides, means .forholding congealed metal in positionto close one side of the cavity, a mov able matrix for closing the other side of the cavity, means for feeding the congealed length which is subsequently sev-.

metal, means for moving the matrix during feed movements, and means for supplying molten metal. j

4. An apparatus forlcasting type'. r 1etal' elements -forpr-inting forms embodying a mold having a cavity in which ,the metal congeals, said cavity being open atone side for the exit of the congealed metal'and pro vided' with an opening for the enhanced 'molten' metal,means for retaining the congealedmetal in position to close the exit opening during the casting operation, a ma- .trix forming one wall of the mold-cavity means for periodically lifting saidmatrix away'fro'm the mold cavity, and meansfor advancing the element while the matrix islifted.

5. Anapparatus' for casting type metal elements for printing forms embodyinga 'mold'having a cavity open on two sides, a matrix movable toward and from the oldforclosing .one of said sides, means Ifor holding metal congealed in the cavit in position to close the other of said sides, means for intermittently moving the matrix away from the mold, and for advancing thecasting to form a space for a succeeding increment, and means for forcibly injecting molten metal into such spac'e.

6; An apparatus for casting type metal elements for printing forms embodying a mold having a cavity open on two'sides,

mean's for holding metal congealed in the cavity in position to close one of said sides,

means for advancing the congealed metal to form a space in rear thereof, a matrix carrier movable transversely of the-cavity, and a' series of matrices mounted in said carrier and movable therewith into position to close the other of said open sides of the cavity.

7 An apparatus for casting type metal elements for printing forms embodying a mold having a cavity open at' two sides, means for supplying molten metal to the congealed out through one open side of the cavity and for holding the congealed metal in position to close said side, and a matrix movable toward and from the mold and having an extension overlapping the congealed metal when the latter -is advanced into position to close the side of the cavity.

8. An apparatus for casting type, metal 110 cavity, means for advancing the metal when I mold having a cavitv for the reception of molten metal, a 'reciprocatory mold blade working in said cavity for feeding the conzgealed metal out of the cavity, means for holding the congealed metal in the exit opening to form one wall of the cavity, a matrix movable toward and from the cavity and provided with an extension overlapping the congealed metal in the exit opening, means Q for alternately lifting the matrix and advancing the mold blade, andm eans for supplying molten metal to the cavity.

10. In apparatus for casting type metal strips composed ofsuccessively cast sections united by fusion, the combination with a mold having a cavity therein open on the exit side, a matrix carrier movable transversely of the mold, a plurality of matrices mounted in the carrier and movable toward and from the mold to form one wall of the cavity, a mold blade working in the cavity to discharge metal congealed therein means for retaining-the congealed metal in the exit to form one Wall of the cavity, an adjustable stop for the mold blade, means for supplying molten metal, and means for periodically operating the mold blade and matrices.

11. In apparatus for casting type metal strips composed of successively cast sections j united by fusion and having a printing sur- 35v face at 'one edge, the combination with a mold having a cavity therein open on the exit side, a matrix for forming the printing edges movable toward and from the mold, means for moving the matrix, a mold blade Working in the mold, means for holding the congealed metal in'the exit opening of the mold to form one wall: of the mold cavity and a stop for limiting the rearward movement of the mold blade embodying a wedge and a micrometer screw for adjusting said wedge, whereby the position of the mold blade may be determined for insuring the mating of the printing surfaces of the several sections of the strip.

12. Inia casting machine such as described, the combination with the matrix carrier head, bridge in which said head is mounted to move vertically, and a cross head connected with said matrix carrier head, of a plun ger mounted in said cross head, a spring. intermediate the plunger and cross head for depressing the cross head, a centering pin, yielding connections intermediate said centering pin and plunger, and means for periodically depressing the plunger for moving the matrix carrier head and centering pin downwardly. V

13. In a casting machine of the type described, a matrix centering and clamping mechanism embodying an operating lever, a matrix carrier head, a cross head connected with the matrix carrier head, a sleeve bearing mounted to move in the cross head,

a plunger mounted in the sleeve bearing,

said plunger and sleeve bearing being pro-- vicled with a headand fingersrespectively for coiiperation with the operating lever, means for adjusting the' fingers on the sleeve bearing into and out of position to coeper ate with said lever, a centering pin, and yielding connections intermediate the centering pin and plunger, substantially as described.

14. In a casting machine of the type described, a matrix centering and clamping mechanism embodying a matrix carrier head, a cross head connected therewith, a

- sleeve bearing mounted to move in said cross head and having downwardly extending fin- 'gers thereon, a plunger mounted to move in said sleeve bearing and having a head thereon for eoeperation with an operating le-. ver, means for turning the sleeve bearing to move the fingers into and out of position for coeperation with an operating lever, acen tering pin, yielding connections intermedi ate the centering pin and plunger, and yield ing connections intermediate the plunger and sleeve bearing, whereby the centering pin and matrix carrier head will be ad.

tions intermediate said lever and mold bladeembodying a pair of levers having unequal arms, one lever connected with the mold blade and the other with the operating le ver, and aspring box intermediate the opposite ends of said pair of levels, whereby the movement of the mold blade will be slower than that of the operating lever.

JOHN SELLERS BANCROFT.

. MAURITZ C. INDAHL.

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