US1307676A - kniokht - Google Patents

Description

' A. L. KNIGHT.

MATRIX ron CASTINGELEMENTS 0F PRINTING FORMS.

' 7 APPLICATION FILED MAR. 25.1919.

' INVENTO/P Patented June 24, 1919.

UNITED STATES PATENT. f

AMOS L. KNIGHT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB- T.0LAN ST0N- MONOTYPE MACHINE GOMEANY, 0F PHILADELPHIA,"BENNSYIQTANIA, A

CQRPORATION OF VIRGINIA.

MATRIX FOR CASTING ELEMENTS OF PRINTING-EO BM.

Specification of Letters Patent. Patented J une 24,

Originalepplication filed lEebruary 15, 1918, Seria11 To. 217,363, Divided and application filed Marcl gfi 1 19. Serial No. 284,995. r

To all who m d may concern:

Be itknown that I, AMos L. KNIGHT, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain new and Improved Matrix for, Casting Elements of Printing-Forms; and I- do herebydeclare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, this application being/a division ofmy application Serial Number 217,363, filed February 15, 1918.

' The invention relates to matrices for casting stripmaterial such as rules, leads and the like, such matrices being adapted to be used finconj unction with a mold to give form to the printing face or equivalent part of the strip material produced by the associated mold and matrix; More particularly the invention relates to matrices for molds of the type disclosed, for example, in United States Letters Patent Number 1,222,4l5, dated April-10, 19,17, and adapted as part of a type casting machine to produce printers rules, leads 'andthe'like, in fused sections or increments to form strips of indefinite length orin non-fused sections of predetermined length.

The patented apparatus, generally speaking, comprises a mold having an opening for the entrance of molten metal and being" open at one end for the exit of the congealed,

metal. means for feedingforwardly the congealed metal, and'means for forcing molten metal behind the forwardly fed congealed metal. The operations of casting and feed ing are carried on in timed relation to each other and are repeated in accordance with the amount of product desired. For feeding the conge'aled metal a reciprocatory mold blade is shown'in' the said patent, which blade advances,-when the metal in the mold cavity is congealed, to push said metal'forwardly toa'vard the exit opening of the mold, and retreats thereafter to leave acavity for -the reception of the' nolten metal reform the succeeding cast.

The present 1' vention has among its principel bieet t Pm SW mammal me referred 130/ Such matricesare preferably mad a etho h h 'per i i fi i forming, as by punching,- Qf't't blank matrix nt ha may e ermed a orme ij matrix provided iwith one or more cavities depressions 'havieg' egenerfl c ara teristics of the cavity or cavities desiredinthe finished matrix, the punching operation being followedby a severing or ciittingofthe formed blank matrix through one or more of the cavities, the severing for each cayity being on a plane chosento dimension the cavity and especially the printing surface forming face in accordance with the dimensions desired in the finished matrix; the ev r pe a on. bein o l w by the substitution for the, cut away portion of the side matrix member, preferably permanently secured, as by rivets to the main matrix member and serving to form, the wall of the cavityalong theplaneof severance, VA single punch of maximu nstrength is prefera-bly employed and a stock of; forined blank matrices is thus produced from which stock a variety of finished rlnatric esn ay be made, whendesired. Another object ofthe invention is thcproductionofa matrix hav ing a cavity one wall, of which as, thewall formedby the side member, may be perpendicular to the bottom or printing SH T-face forming face, of the cavity, whereby typevmay be produced. Such arule isprovided,

with parallel printing surfaces having a groove ,or counter betweenlthemf If'the counter is not sufficiently deep ltW-lll receive and retain 'ink in the printing process and the parallel printed line's produced will then frequently be blurred or otherwise imperfect. The matrix ofthis invention of the kind provided with a plurality'of parallel 'cavities has a maximum total width .of" cav ity bottom coupled with a high elevation or bead between adjacent cavity bottoms, a structure from whichresults a maximum total printing width in the rule. produced from the matrix coupled with a deep counter in the rule between adjacent printing surfaces. The matrix structure as well as the process of making the matrix will now be more fully set forth in connection with the following description of the invention as illustrated in the accompanying drawings, in which Figure 1 is a sectional View of a mold for typemetal strip material, the section being substantially in the plane of th mold blade.

Fig. 2 is a cross section of the mold, the section passing through the nozzle opening and also through parts of the pressure screw clamping device. o

Fig. 3 is a perspective view of the matrix.

Fig. 4 is a sectional diagrammatic view illustrative of part of the method of forming the matrix.

Fig. 5 is a cross section of the formed blank and indicates by a broken line a possible severing plane.

Fig. 6 isa cross section of the finished matrix including a side member riveted to the main member on the plane of severance of the formed matrix blank indicated in Fig. 5. a

Fig. 7 is a fragmentary perspective view of a printers rule formed by the matrix of Flg. 6, and p F1g. 8 1s a cross sectlon of a matrix slniilar to that of Fig. 6 but having parallel printing surface forming faces of different total width and also having two separate side pieces instead of one.

Inasmuch as apparatus substantially corresponding to that of the patent hereinb'efore mentioned has gone into extensive public use and iswell understood in the art, it is thought to be unnecessary to illustrate herein operating mechanism or stops for the mold blade and means whereby the molten metal is injected into the mold cavity, nor is it necessary, for an understanding of the present improvement. to illustrate in detail means for severing thegate from the side of the strip, especially as operating mechanism andthe metal melting and injecting mechanism may substantially correspond to mechanism found in the type casting machines manufactured by the Lanston Monotype Machine Company, which have been in extensive public use for many years.

Referring to the accompanying drawings, it will be seen that the mold illustrated in Figs. 1 and 2 embodies a moldbase block 3. which is formed with a channel therethrough in the direction ofmovement of the mold blade, thus'providing front and rear upwardly extending portions 4 which are adap d. t0 be connec ed ai l'QSS the top of the mold by a tie bar or bars 5. Confined within the channel extending through the mold base are the type or side blocks between which the cavity for the reception of the molten metal is formed, and these type or side blocks are preferably in the form of bars which extend beyond the mold cavity in each direction and are adapted to be separated a distance which will determine the width of the, mold cavity and consequently the point size of the element being cast.

The rear type or side block 8 (Fig. 2) is preferably formed with a smooth inner face and constitutes one wall of the mold cavity as well as the wall of the passage in which the mold blade works and of the exit opentained during the injection of molten metal to form a succeeding cast. The front type or side block may be of similar construction and arranged to be placed in opposition to thelolock 8 but it is preferably formed in two sections 9 and 10, for convenience of manufacture, inasmuch as it has been found desirable to provide at one side of the mold cavity a channel and exit opening through whichair and a portion of the molten metal.

mg in which the congealed metal is refrom the mold cavity may escape in the .which connects the channel with the mold cavity are preferably slightly tapered or. of lncreasmg cross section toward the exit end so as to prevent binding during the movement of the gate toward the exit ofthe channel. Where the front type block is made in two sections, as just described, the upper section 9 is preferably made rigid with the lower section 10 by being fixed accurately thereto and supported by an upwardly extending portion 10 of the section 10, to which it is connected by screws or other suitable fastenings, as shown clearly in Fig. 2.

The two type blocks forming between them the mold cavity and mold blade chan nel are positioned laterally of the mold base by a packing plate 17 placed back of the rear type block and by the pressure screw 18 passing through the front projections of the mold base and adapted.- to operate against the front type block. This pressure screw, in the preferred construction, is operated periodically in time with the feed ing of the element being cast so as to clamp the walls of the mold cavity together dur- I actat 8 ing .thecasting operation and .to release: such :pressure during the, feed .of thQelQIIlEntiQ-lfaward-1y :in the ;moldcavity. I

The bottom got, the mold cavitytis .formed .by. the moldhasefland is prov-idediwith a nozzle opening through which the molten metal; is in ected into, the, mold; cavity through .a nozzle 20* indicated in, dotted lines i11,Eig..-1. v

Inthe specific embodiment of theuinvention illustratedvherein the mold is, adapted for the making. of printers typevhighstrip material provided with a printing-surface,

the latter an.d' .theportionof. the; strip in proximity I to.- said surface being formed by the matrix 2 1. This matrix, as shown, is provided with a cavity the bottom ofwh-ich constitutes a narrow. printing surface formingface: 22, .and a. wide. printingsurface formmgface 22 separated by an.elevation or head 22 bein desi ned to make a printer?s rule with parallelllight and heavy printing edges separated: by a counter as shown .in; Fig. 7. The matrix recess extends through one end of the matrix. to'its full depth so .asto. allow ofithe endwise. ejection of the rule cast-.agaihstzthe. matrix; the. other abutment 23'mounted.on ..theupper faceof therrear. type bloclc; it is held-firmly in .posiend of=the cavity. stops. short of the endiof the: matrix whereby! :anunpunched :end :portion. 21? (Fig. 1') is. provided" for sliding contact with the-mold blade. Thetmatrix when positioned rests upon the type blocks and is adapted: to'seat against a matrix tion by a -matrixcclamp 25 having two surfaces -25 for .cooperatmn with-one edge and the top of the-matrix and inclinedsurface 25 for cooperation withaicorresponding inclined surface on the. matrix: abutment 23, whereby whenvthematrix clamp is forced down by its. clamping screw: 26 the matrix will be forced downwardlyand against its abutment where it will be held withprecision and in such relation to the type block as .to, prevent any liability of molten metal escaping through the joints- A squirtpreventing shield-40 may, if desired, be removably heldaupon the clamp-25ibythe washer 41 yieldingly-pressed againstzthe shield by the spring 42 positioned between the washer mute headiofithescrew 26.

Themold hlade 27 which is mounted to reciprocatebetween the side blocks is of a thickness which corresponds to the point size of themater-ial being cast and it is guidedby-the side blocks. and by the guide extensions 31, 32. the forward and rearward limits :of its inovement being determined by suitable-stops. not shown. Themoldblade isv provided with means whereby its operath1g .memterissimay. bereadily attached thereto, such means conveniently and preferaibly consisting of 'a centrally locatedciroular bearing into which a journal studfifi ample. the punch projection 44 is wider blanks,

balancing inclines regardless of thewidth on .the end of themember 35. is adapted to worla Immediately forward o,f;th is; circu- 7 leg bearing; the mold; blade is formed with an aperture 28 preferably. rectangular for thereception of a lateral rectangular; projectionformed on the rear end of the gate pusher 28-, he, P j n t ga pusher fits loosely within the aperture in the mold blade. so that the pusher may without binding adapt itself vertically as may be required bythe guide channel 12; the parts. are. rectangular so that in any position a large bearing, surface .is provided.

Inaccordance with the preferable, method o fi-m aking the matrix of. this invention, a

.matrix-blank is placed in a container &3 and operated upon in the usual fashion by a punche l, the latter having projections. and

depressions corresponding respectively with 'lShQyClGIll-BSSIOHS and pro ect1ons desired in the-formednratrix blank 45. The projections, of the, punch, or certain oflthem, are larger and stronger, than required for. producing aparticular finished matrix; for exthanthecorresponding depression or printing usurface forming face desired in the matrix shown. in- Fig. 6 and the. matrix blanket) is thereafter cut away on a plane manufacture may be pointed out the following :A large stock of formed matrix blanks 45" may. be produced bypunchingmatrix with a single punch from, which stock a variety of-finished matrices may be made by cutting away in different planes to form unatrices for wide'and narrow printing faces. The provision of a wider punch projection 44 than may. be desired for the corresponding cavity in the finished matrix renders the punch 44 stronger than if it were madeof the dimensions desired for the finished. matrix and it may have counterof the cavity in the finished matrix, and

there is .thusless liability of-breakage. The

punch depression forming the bead 22 of the finished matrix, may be made deeper than would otherwise be practical so as to producea higher bead 22 in the finished matrix;;and ,consequently a deeper counter 46 ina given point size rule or other element l6 pro'duced'from said matrix. This advantage is of great practical importance in connection with the manufacture of operation and the blurred and otherwise imperfect printing matter produced because copies of this patent may be obtained for of such collection are practically prevented.

Another advantage inherent in this invention is that a product such as that shown in Fig. 7 is obtainable one or more sides of which extend in a single plane up to the printing surface. This is due to the use of a side member 21 which has no bevel of the surfaceforming the side wall of the depression 22*; said side Wall, being perpendicular to the printing surface forming face of the depression 22, is, in effect, a continuation of the mold wall andthe product 46 shown in Fig. 7 shows no break or change of direction in the surface formed by the mold and the alined surface formed by the side matrix member 21*. A product of this kind is particularly desirable, as will readily be understood by those skilled in the art, when it is necessary to produce an accurate joining of design in printed matter and such design is partly on one typemetal element and partly on an adjoining element. A further advantage of the invention lies in the fact that the beveled or slanting walls of the punch may be beveled at the proper angle for giving requisite strength and producmg smooth surfaces in the formed matrix blank, although such angle may not be the most desirable in the finished matrix, for, by cutting away and replacing byone or more side pieces a matrix may be produced having the proper bevel from the viewpoint of the matrix and its use, or may indeed have no bevel at all, and is free of many of the defects resultant from the usual methods of manufacture. In Fig 8 I have shown one of the above mentioned modifications'in which the matrix blank 21 formed by a punch to contain two wide printing surface forming faces 22 and 22 separated by the bead 22 is subsequently severed through both of these faces and the side piece 21 and the second side piece21 applied, the whole being preferably riveted together by the rivets 21 By eliminating the side bevel from the matrix a rule having a straight side is obtained, the printing surface of which extends laterally to the side wall of the rule body. This is particularly advantageous in connection with rules having a plurality of parallel printing surfaces with counters between them, because one or more of these surfaces may be thus extended to the side wall of the rule so as to gain a greater width of printing surface therefor or to cause adjacent printing surfaces of given widths to be spaced apart to a maximum degree with a thinbody whereby a sufiicient space is leftbetween them to in the rule. It will thus be seen that the matrix of the present invention is provided with a maximum total width of cavity botprovide a deep counter tom, the cavity bottoms corresponding, of course, with the printing surfaces of the rules produced from the matrices and with a high elevation or bead between bottoms. This ermits of a maximum total width of printing surface in any given point size rule and of desirably deep counters in rules provided with a plurality of parallel closely spaced printing surfaces.

In operation the mold blade is reciprocated from a point in advance of the nozzle opening 20 to a the blade being in sliding leak-proof contact with the surface 21 of the matrix 21 and molten metal is injected through said nozzle opening when the blade is in its retracted position.

The forward wall of the mold cavity is not a structural part of the mold and is not shown; it is formed by the rear edge of the typemetal cast previously 'made and there after advanced by the forward reciprocation of the blade. At the time of casting, as will readily be understood by those familiar with the art, this previously cast type metal is clamped tightly by the screw 18 in posipoint in rear thereof, the top of tion to withstand the pressure of the enter- I ing molten metal. By removing the shield 40 then unscrewing the screw 26 and lifting off the clamp 25, the matrix can be readily removed and replaced' What is claimed is:

1. A matrix for casting printing form elements having a printing face coextensive with and unbroken in the direction of the length of the element, consisting of a matrix body having a matrix cavity therein with an elongated printing surface forming face, said cavity being open at one end to the full depth of the'cavity and having a side wall which is perpendicular to the printing sur face forming face and extending to the full depth of the cavity.

2. A matrix .for casting fused increment printers strip material, consisting of a plurality of selected parts combined to form a matrix cavity havin a bottom for forming the face of the strip material, the sides and one end of said cavity being closed and the other end thereof open for the exit of said material, one of said parts constituting a side wall of the cavity, perpendicular to the bottom of said cavity.

" AMOS L. KNIGHT.

said wall being five cents each, by addressing the gommissionerot Patents, shi g n, D- 6-! V .1 I

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