USRE12404E - X p printing-plate holder - Google Patents

Description

No. 12,404. REISSUED NOV. 7, 1905,'l

c. P. ROGKSTRUH. PRINTING PLATE HOLDER.

AI'PLIOATION FILED APB`.19.V1905.

W'TNEEE I A l` y @MM Y a LBISSULD Nov. 7,1905.

G. .I. RoCKsILoH. PRINTING PLATE HOLDER.

. APLIQILTION FILED 23.19. 1905.

' 4 sHnBTs-SIIBBT 4.

RGCKSTRH 'Mle UFAC'EUEQ new Y FUFiiNTl nl.

l No. ienne.

peoifloetion "Letters Patent.

Reissned. Nov. '7, lf.

Original llci 756,395, dated ,ienne-ry 215, i904. Application for reissue filed pril 19, 1965. Serial No. 256,497.

To dit whom it muy concern;-

Be it known thetl, CHARLES F. Roons'mo, e citizen of the United States, and e. resident of Brooklyn Hills1 in the county of Queens and State oi' New Yong, vlieve invented certain new and useful improvements in Brinting- .Plate Holders, of which the followingl is e specification. .y

rl `his invention relates to en improved holder for stereotype, electrotype, or other printingpletes by whichA seid plates, Whether of legge or small-size, are seenrelyheld in position for printing.

holder comprising e The invention consists of e printing-plete Y block having e series of 'parallel oross-sheped grooves or slots in its 'upper side at right angles with the sides of the block and being seperated from each other by Spaces cifnrresponding` to the point systemlof type-space measurement end in providing detachablev clamps of which has e lateral screW-plete-edjusting device and en automatic locking device for connecting they saine in the grooves or slots of the seid block.

The invention further consists in providing self-securing margin-bers, which ere deteohebly litted into the slots of the holder end which eet as side end end stops for the plete.

The invention also consists in providinpgthe margini-bers .Withe rech ineens of ieteirel et.q justrnent when placed in the oi' the holder. f

-itnlso consists in providing sniteole snp-Y ports oi novel construction and adopted to support en v portion of a. plate 'thet may lie over en v olf the slots in the holder incase the galets iequiies support during; the opereu tion ol' printing. i i

flt further consists o sncli other novel eenA strnetion es will bemin-e fully `the i'oll. wing speciicetion and more espeeielly pointed out in the claims.

The object of my invention is to plete-holder that oy its eid e person een quickly and secrely attach a, stereotype or similar plete or plates in any-position thereon describe-d in.

lrepresents stop View of -tne therefor` and eecn provide a.

and have the ineens oi' obtaining therefor theA greet-est accuracy of lateral adjustmentfwhile the nlinernent of the plete or plates canne determined ley-the 1'iglit-engled positionof the elots with reference tov the edges of the holder end epply end ntilizethe point system o' type measurement Ein sonneetiinftthereifi/ith.4

' poses of clear-ness of illustration.

My object is also to provide detecw'nle supports for :my portions of e. plete pistes that may be' over a slot or slots in the holder end nototlnei'wise supported bythe holder.

The objects are further to utilize the edventeg'es of the mergimoars, the sectional principley of constiuction oi' 'the holder., the rapid clamp-releasing principle ci' n. hand rack-loer, and such other objects will he more fully explained ,in the following speci icstion, whieh is to be teken together with the accompanying drawings. end which similar letters reil to siinile'f' parte through'- ont the several views.

in the drawings, Figure i or pien view of e. pletediolder mede seetions with plates secured thereto end being mede according to improvement. VFig; 2 holder in two sections with a plate secured thereto loy ineens ot' the cla/mp devices. Fig. 3 is e side elevetion of Fig. 2, shown partly in section that the application of the clamps may vnere clearly seen end understood, Fie'. el is en 5 shows a part of plete end holder with e.

suppoit in position therein and in which the edge of the plete projects ever one ofi slots in the holder. v Eigs. 'f3 end 7 :ire top side views, respectively, ol snnport, and 8 is e perspective vier.T of the seine. Fig. 9 shows s top view oie holder with e plate thereon and boing provided. with sid'e nizn'ginbnr and en end inergindler and Clamps. Fig. l0 is e vertical vsectional view olf e side margin bei in position in slot the holder und en edge ol e plete in. contact there with. lligs. il and i2 are topend side perspective views...r respectively, oi the side gin here or stops shown in Figs. 3 er; Fig. l?) is en end vertical sectional view o the end inni-gin bei* or etop mechanism, shown `Also in 9. Figs.. le and l5 are pees ies" tive viewsof the end-inni'ginher-ndjnstlnent mechanism, also shown in Figs. 9 end Figs. 1.6, i7, 15%., and 19., respectivelya nre side. top, end, end front views of the 'clamp rneclim anisni and inenlerged proportions for pnl'- lig. 20 is 9. side elevetion of. the hand rack-her by is operated.

represents e top 10S. means of which the clempvscx'ew mechanism I plate-holder, having the vertical grooves lor vslots u2 z3 twelve l and forty-eight points, or four picas, between centers Vopening in Jfrom the top a* of the holder and having side slots e e through their entire length.

L represent-'plates in position upon the holder and secured thereto by the clamps c c, the edges 6 oi' which are beveled in the usual manner and the lips-c c of the clamps c o being correspondingly shaped to lit down upon and make contact `with the edges of the plates. Each lower or body portion c2 of the clamp c is longitudinally apertured and interiorlythreaded to receive and t the screw d, yhaving the 'pinion al secured thereto (oi' made integral therewith) near the head fl. The screw f7 has also a threaded connection with the tumbler' e and is washer fyand all these parts are made of such dimensions as will admit of the whole device being dropped freely into the slots a2 as, as seen in Figs. l, 2, 3, 9, and 19, respectively, or removable by lifting upward therefrom, as may be desired. vA rack-bar g, provided with a handle g', mesheswith pinions d" d of the clamp-screws d d and is the means provided to turn the screws when they are in proper position in the slots of the holder and the plates or adjusted thereon or removed therefrom, as may be desired. The clampv c may have a swivel connection with the threaded portion o2, as shown in Figs. i and 17, when a plate is to be set at an angle on the holder, as shown by plate 742 in Fig. l. The clamp may also be made of any desired length and have two or more screws connected thereto, as shown by c3 in Fig. l. 4

The tumbler e is anges e e2, w iich are in registering position with the side slots af a. of the slots die and 4blcr e is in such a position,

' and the head Ziof the screw fall into either of said side the screw a? may be turned in the operation of adjusting the clamp mechanism against the plate and as indicated by the dotted lines in Fig. 19. When the tumthe screw o? and the clamp c are prevented from rising up out of the clamp-slot (La, while the lip c of the clamp c will draw down the top of the holder, and thus hold it firmly thereon. The washer f betweenl the pinion il d, which is larger than the pinion and may be of any desired shape, is intended to take the back thrust of the screw and provide a smooth seat for the pinion to work against and to keep the pinion clear ofthe bottom of the slot. A notch e3 in the upper surface of the tumbler e' is provided that the tumbler may be moved into a vertical position bythe aid ofa tool of any kind suitable for the purpose, that the Whole .so arranged as to slots', according as clamp mechanism may be removed by lifting from the slot the same vertically andibodily points, 'or one pica, wide provided A with a,

are to be secured theretov provided with lateral l plate upon thein the holder in which it is placed whenever it is necessary to do this.

The tumbler e acts as a detent for the clamp by engaging ineither of the lateral slots of the main vertical slot in which the device is placed. The rotation of the screw d, by means of which the tumbler @is connected with the clamp c,r moves the tumbler into one or the other of the lateral slots-ct5 ci in the vertical slot, according to the direction in which the screw may be turned, as shown by the dotted lines in Fig. 19.` The tumbler can be made in any shape that will provide a shoulder or .abutting surface that will register and engagewith corresponding shoulders or surfaces that may be provided in the vertical slots' in the plate-holder or so that it will otherwise impinge and bind against a side or sides of the vertical slots, and thus secure the clamp to the holder. The tumbler and clamp may also be connected together in any manner in which the tumbler will detachably bind the clamp ina slot to the holder, as I do not limit the scope of my invention in this respectto the particular form of construction of engagingl or tumbler mechanism herein shown and described. The clamp devices can only be inserted into the clamp-'slots at the points of intersection of other in the holder, as the transverse plane of the pinions d al and Washers ff with reference to the screws CZ d necessitates this method of their manipulation' and. adjustment to be operative and secure the clamps to the holder.

The side margin barorvstop i (shown in position in the holderin Fig. 9) takes the side thrus't'of the opposite clamps upon the plate held between them, and the longitudinal rib /i on the side of it is in registering position with a corresponding side slot a in the clamp-slot a2 of the holder, and the stop is thus prevented from lrisingr up out of it whenever the plate is held by the clamp mechanism against it, as seen upper edge h2 of the stopft has a projecting lip h3, and under which on the side of the stop is provided a lateral seat it", upon which. the edge of the plate rests, as seen in Fig. l0, which provides a support for the edge ot' the plate in this way. The stop l1, is also provided with lateral lugs it it, which loosely lit into the transverse slots a3 a3 to prevent end movement of the stop. This whole arrangement provides a simple and effective 'means of taking the pressure of the plate and lipid-- ing it down firmly upon the holder While giving the edge thereof a solid support, as seen inFig. l0 and as can be understood without further/explanation.

The end stop vf has the rack t" projecting at right angles therewith and from its lower surface and the teeth of which engage with those of a correspondingrack-bar j, having the lateral projecting lugs j v1'2 and, as seen in Figs. 14 and l5, detached from .each other.

the latter with each I inFigs. 9 and 10. The

The raciebar construction ofthe parts c' j admit of an adjustment corresponding to the pitch of the teeth and the length of the racks for the end stop fr'. The lugs j f2 fit loosely in the slot transverse with the bar, thus preventing end motion of the latter, while the under surface of the plate rests upon the upper surfaceof the rack vf', as seen in F.ig. 13, thus preventing the device from rising out of the slots in which it is placed. The plate in this way holds the stop down in' position upon the holder and the plate itself being held down by the action of the clamps and sidestep mechanism, as seenV in'Fig. 9.

The holder may be made of `metal or any other suitable material andall the parts made integral or secured together, as may be found most desirable. The edges of the sections of the holderareprovided with removabledowelpins which lit into corresponding holes le in the holder, andthus lock thesections together, sothatthe slots will register' with one another in the sections thus united. The frame has mortise-and-tendn joints 'at the corners and in each of' which is provided a screw-pin to secure theparts together and which can be understoodwithout further explanation. (See Fig. l.) The support m is provided to support a portion of a plate that may project over a slot in the holder andk have no other means of withstanding any heavy pressure that may be'applied thereon incidental to the printing operation. ltl may be of anydesired dimensions and shaped so as to fit loosely into the 'slots at any intersection thereof and be of a height equal' to their depth. 1t is provided with sider notches m' m lto facilitate its'rernoval from' the holder when not in use. Its cross-shaped form is for the pur? pose of preventing it from lmo'vingout of position in the holder when it isrus'ed. kThe surfaces of the squares between the slotsof the holder may be ruledas shown in Fig. 9, and in which the .l=ins are supposed to be twelve points, orone pica, apart.

n represents. an adjustable folderfpoint that may be inserted in the clamp-screw mechanism for the purpose of perforating the sheets of paper during the printing operation, vso as to furnish guides to a bookbinder to register the fold in the sheets' in the operation of folding with a :folding-machine. by substituting a screw for the rivet, as indicated bythedotted lines in Fig. 17, a lateral adjustment may can make around theusaid screw.

The right and left hand clamp-screws may be designated by having tlieolamps dilferently colored, shaped,or marked to distinguish them be given to the 'point n equal to the sweep it at a glance when being yThe operation of myimproved holder will now be explained. When vit is necessary to mount a plate upon the holder, thel requisite number of clamps are. placed in. the slots of the holder .all complete and together, as

in the slot and overthe pinion or pinions of the screw or screws to be thusadjusted. The pitch-line of the hand rack-bar g is below the top surface of the holder on account ot the diameter ofthe pinions being of the requisite dimensions to admit of this, and this causes the slot to act as aguide for the hand rackbar to move in and over any pinion or pinions in the same slot. This arrangement of the parts enables a printer to close or open the clamps with reference to the plate very quickly and when the margin between the plates is close or narrow,'and by making theiscrews withright-hand and leftdia-nd threads for opposite plates, respectively', the release of a number of plates can beelfected very quickly with a few quick movements ofthe hand rackbar. Thelslots beinglat right angles with the edges of the holder enables the printer to set the plates inaccurate and correct alinement thereon and while it is inposition upon the bed of a printing-press and which is of great advantage. holder so that they register corresponding to The slots"are arranged in the what is4 known as the point system in the printing-trade and the advantagesof which ,in adjusting the plates upon a holder are corrfespondihgly veryfgreat. The point system is a standard of measurement of the bodies of type, one point being equal to .0138 of an inch, nonpareil type measuring six points, pica measu ring-twelve points, and so ou. Pica type is the standard unit of measurement in the printing-trade for the thickness and length of leads, rules, &c.-as,.for instance, a siX-to-pica lead, a page twenty-four picas wide, and the like. The slots in the holder are one pica in width and four picas (or forty-eight points) from center to center,. thus leaving the intervening IOO squares three picas, or about a half-inch, in

size. If a plate is to be set on the holder at an oblique angle with the edges of the holder, as shown at b2 in Fig. 1, the swivel form of con struction of the clamp shownin Fig. 17.will allow the clampto adjust itself against the edge of the plate accordingly, and as's'everal are shown as securing Athe plate b in the holder in Fig. l. 1f the side orv end stops It are to be used, they are insertedy in the slots, and the plate is laid upon the holderand against thorn near their upper edges.r as seen in Fig. 9, and the portions projecting .under the plate, as indicated by the dotted lines, will cause them to be held down imposition by the plate, While the Stops hold the plate in position thereon on accountfof the opposite edges of theplate being held down upon the holder and forced against of the stop while it is lthus in use. The

. paijfnfqiall-pliers passed down into the slot. .whwllenia large plate isto be mounted upon a do, prevent anyvendv mevementof thestops,

`justment of the stop corresponding to the sition preparatory to removing the clamp der vice from the holder by moving it accordingly with a penknit'e, screwdriver, or similar tool,

Awhich lcan be inserted in the notch e3 'of the ,tumbler e, provided fo'r 'the purpose. j

1:5 notches m' ya' in the support in) are provided theret and 'for a similar purpose, 4or in rde'ij tchathe clamp device te vertically out ef fthe. slot, ashereinbefore stated, the saure or the t"'"inbler portionalone may be grasped by a the Steps, as indicated in Figs. 9,10, 13, respectively.v The lugs laf fr? and j" jof the'stops z and il, fitting in the stets of the holder, as they that might'otherwise occur while the devices' were in use. The toothed arrangement of the rack portions of Athe end stp, zf,'"`as shown lin Figs. 13, 14, 15, gives a limitedl means of ad pitch of the teeth thereon, and by reversing the lowerpart ,7' in the slot in which it is to be placed an adjustment equal to one-half of the distance of the pitch oi' the teethcan be obtained on account of the relative position' of the lugs j; j with reference to the part j, 'which is determined accordingly. .When a portion of the plate-projects over the slot and it requires support in the printing operation, the support m; is' inserted in the slot and the plate then adjusted .se as tol rest upon it at the point to be supper-teams is Fig', 5, and' the desired result is therebyobtairied, while the laterally-projecting portions of the support registering at the intersection f the slots., as they do, will prevent any movement tumbler e can be brought it a vert-ical p o- The the latter can' be made up from secs corresponding sizev and the slots v'villeome together in proper alineinent on ac- Count of the position ot' the dowel-pinst' with reference to the holes 1 la in the sections andwliich Iare located accordingly. When the plates are arranged closely together-'that is, with small margin between them, as seen in the upper portions of Fig. l-all of the interveningelamp-screws.can be turned so as to release or bind the plates with one movement of the hand rack-bar, providing the screws facing in opposite directions are made' with right-hand and left-hand threads, respectively. The delicacy and accuracy obtained in moving the clamps which is pro-- vided through the screws with their respective pinions, while at the same time giving aposif tive and secure grip upon the plate with the holder, is effected by the use of the han'dj` but is now to suit the size 'or position in which theplate or plates are to be mounted thereon and that it can be. moved readily and vcleaned'. The` construction ot the "clamps admits of their being adjusted to any position on the holder by simply inserting them -inte the slots' from the top ofthe holder;- their automatic tumblerlocking action, together with ltheir ineac curate, and positive lateral adjustment; the

upon the pointsystem of measurement,

which facilitates the adjustment of the plate or plates thereon while being upon the bed ot' a printingpress; the pinion and hand rackbar mechanism which facilitates the accurate adjustment of the plates and their ra id release fro'mthe holder when desired', arid the detachable frame, which permits of the sections of the holder bei-ng quickly and etfectively locked up together.

,The close proximity oi" the slots with each other and the narrow dimensions of the slots admit of securing the plates on the holder withthe smallest margin required for book and job printing. lVhen plates of illustrations are being printed and the pressure thereon v.is very great, the support given to the plates by tlie'supports in the slots is of great advantage in preventing the plate from yielding. to the pressure it is undergoing during the operation of printing. "In

the case of light pressure incidental to the l use of plates'iof text only the Vlimited width A l of the slots 'obviates the necessity ofA using any support. As constructed, however, the holder will stand any ordinary pressure inci-, dental to printing the plates thereon without"`| any damage to the plat-es or the necessity of using the supports. The clamptumbler is longer than the width lof the slots, so that the 'operationof the clamp-screw mechanism cani not throw the tumbler out of alinement'with the slot while passing a transverse slot during the manipulation of the' clamp-screw. The end of the screw is lriveted over in practice to prevent the` tumbler or clampv from being unscrewed or separated therefrom, and the lower portion of the 'clam projects under'the upper projecting portion of the tumbler to prevent the latter from being separated from the clamp. The head of the screw takes the .longitudinal thrust of the hand rack-bar in the act ot' manipulatingthe screw'by coming in contact with the sides of the slot. The slots are arranged inthe holder in such a manner as to bring the contiguous s lots of adjoining sections the same distance from each .other as the other slots in thesectious are from eachother. This arrangement provides for lbroad surfaces onthe edges of `the sections when brought together iuuniting twcor-.more

,a plate.

The device is especially advantageous for photo-engravers and electrotypers, as the height of the holder' may be increased so that together with the thickness of an original engraved plate it will be type-high, thus obviating the necessity of blocking the plate on wood or metal. A

Sometimes in printing-'say a book, for in- I stance-the back margin of the book may be very narrow and it may be fuund desirable not to disturb theposition of the clamps. between the two ,continuous plates, as shown at 63 o* in Fig. 1, and yet it may be necessary to move or adjust the outer opposite clamps securing said plates or even the 'plates themselves. In such a case the clamps to be left undisturbed are {irst set in the proper position and then the plates are laid upon the holder over the pinions of the clamp-screws, thus covering them up, as seen in Fig. 2, and rendering it impossible to disturb the position of the clamps by accident or otherwise until the plates are again removed. This is one of the advantages of this form of clamp lconstruction, and, so far as l know, is exclusive to this invention. This feature also shows the exceedingly close or narrow margin that shaped to it such modification of construction' and Without'departing from tlie'principle of construction involved in this invention. In such a case' tbg principle of curvature, as applied to the holder. can be so extended as to admit of the holder forming the entireouter portionpf the cylinder, or to com prise of such portions of the samefas may be desired. 1n this waygtlie holder can be made in the form of a complete -cylinder and substituted for a plain cylinder of a rotary printing-press,"such as a web-press or thelike.

1t can thus beseen that l provide a complete .device for the purposes intended, and which can be understood Without further description, 'i f Having thus described my invention, what I claim, and desire to secure by Letters Patent, is; y l

1. The combination vina bed for printingplates having slots'c'rossing in opposite directions, .of a clamp device 'for securing printingplates to said bed adapted-to be placed down into any of said slots and'takentherefrom by a movement at.' rightanglesto the plane of the plate', said clamp device essentially comprising a pinion',l a'screW-stem connected to the pinion and adapted to yoccupy a position in and longitudinally of said slot, a clampblock having an edge lip for engaging the printing-plate and perforated and interiorly threaded to receive said screw-stem and adapted to snugly fit the slot ofthe said bed and to be moved longitudinally therein by the rotation of the pinion and screw, and a means for preventing the accidental separation of said clamp-device from-the slot of said bed.

2. The combination in a'bed for printingplates having slots crossingin opposite directions, of a clamp device for securing printingplates to said bed adapted to bel placed down into any ofsaid slots and taken therefrom by a movement at right angles to the plane of the plate. said' clamp device essentially comprising a pinion, a screw-stem connected to the pinion 'and adapted -to occupy a position in and longitudinally ofsaid slot, a clampblock having an edge or lip for engaging the printingplate and perforated and interiorly threaded to receive said screw-stem and ad apted to snugly fit. the slot of said bed and to be moved longitudinally therein-by the rotation of the pinion and screw, means for preventing the accidental separation of said clampingV device from the slo't of said bed, and means alsoadapted to lit down in the slots of said bed and to take a bearing in the bed against IOO the thrust action of the said screw-stem in clamping the printing-plate.

3. .The combination-in a bed for printing-y plates having slots crossing in opposite direc- IIO tions, of a clamp device for securing printmgplates to said bed .adapted to be placed down into any of said slots and taken therefrom by a movement at right angles to the plane of the plate, said clamp device essentially comprising a piniomascrew-stem connected to the pinion and adapted tol occupy a position down in and longitudinally of said slot, a clamp-block received upon and movable longitudinally of said stern andalso adapted to fit snugly down into said slot and be movable longitudinally therein, an edge or lip upon saidclamp-block and rising above and extending across the said block above the surface of the printingplate for engaging' said printingplate, and a/device associated With said clampsnuglyldown into said slot,.and be movable longitudinally4 therein, ari edge or lip upon said'clamp-block rising across the said block above the surface of the printingplate for engaging said printingplate,a device associated with said clamp-block and adapted to engage the slot of said bed for preventing the accidental separation of the clamp device from the slot of said bed, and a plate associated with the pinion and extending across the screw-stem fitting 'down into the slot of the bed and taking a bearing in the bed against the end thrust oi' the clamp device in securing the printing-piate in position.

5. A clamp device for a printing-plate holder, adapted to be placed down into the slots of a printing-plate and taken therefrom by a movement at right angles to the plane of the plate consisting of a screw, a pinion adjacent to one 'end ofthe screw, a bearing-plate associated with and extending across the screw adjacent to the pinion, a clamp-block threaded to receive said screw and movable longitudinally thereon and having an edge or lip for engaging the printing-plate, and means associated and coacting with said parts and adapted to prevent the accidental removal of said clamp device, substantially as speciiied.

6. The combination in a bed for printingplates having undercut and shouldered slots in opposite directions and at right angles to one another, of a clamp device for securing printing-plates to said bed adapted to be placed down into any of said slots and removed therefrom, said clamp device essentially comprising a pinion, a screw-stem connected to the pinion and adapted to occupy a position in and' longitudinally of said slot, a clamp-block having an edge li'p for engaging the printin -plate and perforated and interiorly threaded to receive said screw-stem and adapted to snugly fit the slot of the said bed and to be moved longitudinally therein by the rotation of the pinion and screw, and a means for engaging the undercut shouldered portion of said slots for preventing the accidental separation of said clamp device from the slot of said bed.

7. A clamp mechanism for a bed for printing-plates having a slot-connecting detent-acting tumbler device combined therewith, substantially as specified. i

81A clamp mechanism for a -bed for printing-plates having' a clamp-slot therein, conabove and extending sisting of the clamp' and a dtient-acting tumbler device adapted to engage in the slot and thereby secure the clamp to the bed, substanl tially as specied.

A9. A clamp mechanism fora bed for printing-plates having clam p-slots therein, consisting of a clamp, a detent-acting tumbler and a screw, the screw provided with means for its adjustment and litted to the clamp and tumbler and connecting them together, substantially as specified.

l0. In' combination with a bed for printing-plates having clamp-slots therein at right angles with each other, and of dimensions in,

. width and apart corresponding to the pica system of measurement, a clamp mechanism constructed so as to be insertible in said slots at the point of their intersection in the plate-bed and being provided with a detent-act'ing tumbler means for being secu red thereto when thus inserted inV said slots and he ing :w1 iateral adjusting-screw device,substa v 3.all5, specilied.

1l. Infcombination with a bed for printing-plates having clamp-slots therein at right angles-with each other, a clamp mechanism constructed so as to be insertible in said slots at the point ot' their intersection in the platevbed and being' provided with a detent-acting tumbler means for being' secured thereto when thus inserted in said slots and havinga lateral adjusting-screwdevice, su bstantially as specillied.

l2. In combination with 'a'bed for printing-plates having clamp-slots therein :it right angles with each other, a clamp mechanism provided with a tumbler and lateral adjusting-,screw and constructed so as to be insertible in said slots at the point ot' their intersection in the plate-bed, snbstantialhv as specified.

. 13. The folder-point device for a bed tor printing-plates having clamp-slots therein, provided with a tumbler-and a lateral adjusting-screw connecting the point and the tumbler together, substantially as specified.

14. In combination with al bed for. printing-plates havingclamp-slots therein,a folderpoint device provided with a tumbler and a lateral adjusting-screw'connecting' the folderpoint and the tumbler, substantially as specitied.

15. The clamp device for a printing-plate IOO IOS

IIC

holder consisting of the clamp, the tumbler,

and the screw, and the clamp and tumbler being connected to the screw, and all combined, substantially as specified. l

16. The clamp device'for a printing-plate holder consisting of the clamp, the tumbler, and the screw provided with a pinion-head, and the clamp and tumblerbeing' threaded vand fitted to the screw and alLcombined, substantially as specitied.

17. The clamp device for a printing-plate l10lde1',-consisting of the clamp having a swivelhead, the tumbler having the lateral {ianges on its upper extremity, and the screw pro` vided with a pinion-shaped head and the tumbler and clamp being threaded to fit the screw and all combined, substantially as specified. s

18. In a printing-plate holderhaving a longitudinal clamp-slot having side slots therein,

the combination ltherewith of a plate-clampdevice provided'with a tumbler having lateral ianges in its upper extremity which are adapted to engage with the side slots in the clampslot in the holder and the clamp and tumbler being provided with a screw fitted to the clamp and tumbler mechanism and having a pinionhead and a Washer fitted thereto and the pinionhead of the screw and the Washer 'adapted to fit in a transverseslot in the holder and adapted to give a lateral means ofadjustment vto the clamp, ,substantially as specified. V

19. In combination with a bed for printingi plates having clamp-slots therein at right an.-

gles with each otherfa folder-point mechanism provided with a tumbler and lateral adjustingscrew and constructed so as to be insertible in' said slots at the point oftheir intersection in the plate, substantially as specified.

20. In a printing-plate holder the combination therewithof the end stop c', having the rack-section fel', in combination with the racksection j, havingthe vslot-registering lugs,.`j, f2, substantially as specified.

2L In a printing-plate holder having slots therein, the combination therewith of the'side stop ft, having-the lateral projecting rib h',

adapted -to fit in corresponding lateral slots in the clamp-slots inthefholder and beingr provided'with the laterally-projecting lugs h5, its, substantially as specified.

y 22. Aside stop for aprinting-plate holder having'a 1lateral projecting; rib it' on one of its sides and the lip h3, andthe shoulder upon '5 its opposite side,the shoulder adapted to support the-edge of ythe plate and the stop being providedWi-ththe laterally-,projecting lugs h5 t, substantially as speciiied. l I

23. The combination in a bed for printingplates having slots crossing in opposite directions, of a, clamp device for securing printingplates to said bed adapted to he placed down I yinto any of said slots and taken therefrom by a movement at right angles tothe plane of the plate, said clamp device essentially comprising a pinion, a screW-stemconnected to the pinion and adapted to occupy a position in and longitudinally of said slot,.a clamp-block having an edge lip for engaging the printing-plate and adapted to snugly fit the slot of the said bed and to be moved longitudinally therein by the rotation-of the pinionand screw, and a means for preventing the accidental separation of said clamp device romthe slot of said bed.

24. The combination in a bed for printingplates having slots crossing in opposite direc-v tions, of aclamp device for securing printingplates to said bed adapted to-be placed down into any of said slots and taken therefrom by amovement at right angles to the plane of the plate, said clamp device essentially comprising a pinion, a screw-stem connected to the pinion and adapted to' occupy a position in and longitudinally of said slot, a clamp-block having an edge or lip for engaging' the printingplate and adapted to snugly lit the slot of said bed and to be moved longitudinally therein by the rotation of the pinion and screw, means 4for preventing the accidental separation of said clamping device from the slot of said bed, and means also adapted to lit down in the slots of said bed and to take a bearing in the bed against thethrust action of the said screwstem in clamping the printing-plate.

Signed by me this 24th day ot' March, 1905.

CHARLES F. RUKSTROH.

Witnesses: f

GEO. T. PINGKNEY, CHAS. H. SMITH.

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