US1282013A - Method of and apparatus for shaving printing-plates. - Google Patents

Description

L W. CLAYBOURN'. METHODYOF AND APPARATUS FOR SHAVING PRINTING PLATES.

APPLICATION FILED MARJZ. 9H-

$4 inesueq:

L. W CLAYBOURN. Mmwn or AND APPARATUSYFOR vgmwms PRINTING PLATES.

APPLICATION FILED hig 1911. I

. Patented Oct. 15, 1918.

4SHEETS-SHEET a.

L. N.. CLAYBOURN. METHOD OF AND APPARATUS FOR SHAVlN-G PRINTING PLATES.

APPLIcAYmN FILED MAR. 12. 1911 i Patented Oct. 15, I918 4 SHEETS--SHEET W M Mi k LESLIE w. emu Boonie, or cmcnnm'rz, omo;

METI-IQD OF AND APPARATUS FORQSHAVING,PRIN TING-PLATES.

' Application filed March 12. 1917. I Serial No. L242.

To all whom it"m'ay c'onoern:

Specification of Letters Patent.

Be it known that I. Lnsmn \V. Cnirnonnx,

a citizen of the l' liited' States. residing at (im-innati. in theeonnty ot-llainilton and Slate of Ohio have invented certain new and useful Improvements in Methodsor' and .tpparntus for Shaving PrintinmPlates. of whichthe follownig is a specification Y My invention relates to the art ()ffillzlY- ing the under or hearingsin-fares of print: ing plates, tllld' it is the object of my inventiolLtoLproA. .iile for rend erin g pri min-n plates of uniformthiekness throughout at their printing portions? l'rintinguplates eastor formed In any of the. present. well-known methods, are subjeet'lo undesirable irregularities in the thickness of the plates at their printing portions, -caused for instance by uneven "and shrinking of the plates. These irregu- "larities cause undue high or low places in the printingsurtare, or rarlatlons 1n the contour of the rear hearing tare ot the plate relative lied or printed to the cooperating fare of aplate yvlinder, as a result of which, the

impression made by the plate has greater variations than desirable in the, imprint of the lines and dilierent parts thereof, (lne to the ovenvariations in the pressuro-applied at the i'ariounf parts of the printing sun-fare 0t such plate. when printing from the same.

' An attempt may be made to counteract the :iunlesirahle results of su'eh ariationslin the thickness of the p'latmhy the well-known methods of o\'erla-y ing" the tympani-"of a printing press or unilerlaying the plate. in the printing press, as understood in the art, these methods j hei 111g obj eetiol'iable howeyer, as being: ilnpermanenh .time-consuming, and expensive. i I

It is the object of li y; present invention to so net on'the printing'plate and to provide means whereby the printing plate is reduced to a uniform thickness "throughout" at its printing po 1'ti'ons, so that thennecesslty of cooling,

overlaying or umlerlaying? may be' l n ng mounted upon suitah e legs 12:

plate by a rigid support, andshavin t-the shaving'lines.

Ptttented'Oct. 15, 1e1

rear face thereof in interrupted iinesi whi applying pressure to said rear faceasub'ste it, tiall eoineiclelnt with the interruptions. i111, x The invention consists further in the pm vision of a rigid support for the printing}. plate, and shaving means for the printing-r; plateeomprisingt a cutting edge havingflam pathot' mo vement spaced throughout equallyfrom the rigid support, and resser means- :u-l izu-enl'. the cutting edge adapted tOnilgethe printing plate toward its rigid support,

The invention consists further inthe -p1.'o-. vision of a flexible relatively non-compre sihli' supporting means for a p'rinthig plate and means for adjusting the distance nb tween the SlltlVlllg lTlQLlltllllSlIl and the su porting means. i 1 1 r l a I The invention will-be. further readilyunderst ooil I from the following description and claims, and from the driuvings illustrating n1 im n-oved"exemplified apparatus, in which latter: Figure 1 is an end elevation of the m ehine with the spokes of the operating handwheel partly broken away. v Fig, 2 is a plan view of the same withthe spokes of the hand-wheel removed. I Fig. 3 is a vertical section taken on tl line 33 of Fig. 2. "z Fig. 4 is a detail taken on the line of Fig.3. 1 F 5 fi-.and '7, zj ffi tlet tlllSih" erticl section taken on the linesv of li igQ-fiw 6&6 of Fig. 5, and 7.'? of Fig. 6, resp' e t vel y 'j Fin". '8 is a detaill fragmentary plan of the shaving-amt presser means.

Fig. 9 is a detailfragmentary' end elm-m tion of the 'n'laehinezshowing the; poslt'oh ing] stop and ela nping mechanism for plate; and, a 4 v i 1 Fig. 10' is a verticalseetiontaken o the irregular line 1 0-10 of Fig. 35 an'dpait1 1 00 I have exemplified a irm ch'ine"forshii n curved printing --plat es,. althouglfiparts "3 theinvention'ar'e applicalileto shaying N rigid; sup rt e Hedi tronghr I; the-"tron ti liin Shaving means and means for causin eotained within the trough byan adjustable 115 positioning gage and a cooperating clamp 19. J

' Trough 11 is exemplified as comprising a rigid curvedwall 25. having outwardly extending edge-flanges 26, 27, and forming an 20 elongated body having an inner curved face 28, which is a sector .of a cylinder. A flcXible plate 29, instanced as of amaterial, such as brass, cross-sectionally non-yielding in comparison with the printing-plate is received within ,trough :11, preferab with adjusting layers, such as paper sh ts 3d, interposed between the inner face of the trough and the plate.

Sheets 31 of selective t-hickiiessesare cm- '65 space between said path and said face, 28-

50 iii g support "44 either by Theseme'ans are instaneed as com )rising a 1,; '44 beyond the proximate bearing; z gear-being arranged to mesh with a pinion 80 ployed, depending on the character of the printing face, for producing proper impression of the printing lines thereon. The plate being flexible willadapt itself to the curvature ofrt-he surfaceupon which it is lisupported. The ends of'the trough are instaneecLas closed by end-walls 35, preferably secured by bolts 3? toflanges 38 at the outer ends of the trough. Strengthenribs, such as shown at 40, are prefer- 40 ably rovided upon the outer face of the trough prises a support 44 having trunnions '45 at the ends thereof, the trunnions being in 55 stanced asjourn'aled .in bearings 47, formed uponthe respective end-walls 35 of the trough and preferably projecting-within thetrough an appreciable distance as shown at 46. Suitable means are provided for. rot-a thand or power,

gear 48 t0 a trunnion 45 o support 47', the

; 49, preferably rotativ'ely mounted uponi-a "'rbrac'ket 56- extending laterally-from .the "proximate end-wall35-of, trough-11 Pin,

I "10 1 -49 is instan wheel '51 so'as to he rotated'thereby;

trough 11, thatdarina its rotation the path of movement ofthe shaving parts supgo'rtetfl.

v or o thereby is concentric with the eylin which face 289i the tronmh is a sector,- the supporting face 55 pon which the .parts aremounted, and iii-order topro-vide The shaving mechanism preferably com 10 the ledge, and to be secured thereto at cedjas secured'Lto a hand-,

Support 44. i s so journaled relative to" being in the formof the sector of a eylinder, and of uniform depth.

A ledge 54 upon which the mechanism is mounted, is exemplified as projectupon late 29. v Lodge 54 is insta ced as provided with a shaving suflicient' space forlateral adjustment of the shaving pa relative to the. ledge, the face of sup rt 4 proximateto supporting face 55 of t e le go, is preferably cut away, forming a plane urfaee 56 perpendicularto the supporting ace 55 of the led The ledge may be suitably bracedas y -outwardly extendgig ribs 57 connecting the face 58 of the go. which is opposite sup porting face 5 5,'and the proximate surface of support 44.

The shaving parts mounted upon ledge 54 com risevknives 60, extending crosswise of the ed e "and am d in spaced relation lengt wise 'thereo and pressure ex- 'erting devices adjacent the respectiveknives adapted to apply localized yielding pressure as. to the rear face 17 of the rintlng plate y the shaving are preferably laterally relative to over the area being acted on knives. The shaving arts arranged to be adjust the ledge 54,-and toward and from the sup-' port for the pi ti plated For this ur pose the shavi'ii; 51178 are exemplified as including a bar 62, adjustably mounted upon the ledge, and to which kn1ves 60 and the pressure exerting .devices are secured.

Bar 62 is instanced as provided with a bearing-face 63. slidablycontacting support- Ina'yface 55 of ledge .54,"the bar preferably being adapted to be guided laterally rel'ative' adjusted positions-"by bolts -64. The bolts farle exemplified as extending throughivsuitable-lateral y extending slots 65 in ledge 54, with thee ds' of the boltsreceived in the bearing-face offbar 62 by'threaded connec tions 66, and the heads 67 of the bolts, which may be provided with washers 68 arranged to contact face 58 of ledge 54, so that when the bolts'ar'e tightened, bar 62 will be rigidly clam ed upon the ledge.

.130 ts 73 are instaneed as received, as bythreaded connections-74, in face 56-01? sup: l 7' port 44, with the heads 75 of the bolts inipln-gmgagainst' the proximate face 76 ofbar 62, no that byturning the bolts the lateral positionof the bar 62 upon ledge 54 may be regulated.

T-hejknives-seeurcd to bar 62 are instanced as each c'omprislng a s(shank 79 having a transverse blade 80 at h ,3. d" thereof, the, 4

til

blade-bell! ,provided' with a -rctit ting edge 'l(l((l \vifh depent'ling lugs 10 um 81. The sfiankg of ithe knives are exemplh .HlllfflbltMfllQ )t'vssions 102 foi'nn-tl iltt fa 3 fled as received respectively in laterally t X- 01 ha 1' (i2 llt-Wttill each atlja ent re tending grtxgyes 82; formed in the face-pt and grtmW-S'l. lfllLKVUktH are guided: l 5 bar 62 which is opposite beating-face (i3 proximate ,s'ltlcs (:l shanksf'l't) at I lthei'eof and which IS represent-ell at N3. the roveivvtl in grooves 82. -R0llvt's b't I30 1 knives being removablv secured lathe-flair Vltlt'tl .wit-h jotn'nal pins 1H5tllflttl-llt'tl' lfi l tt -ta s by screwsysi extending" through the t'e-, 103. the pa rts oping yn'ot'ei -altly st) a mg.

spective shanks 79. Grooves SZ-jtlllll the that the I 'UllQK-h' are l'lt'OlYt'tllll lt'tU knives seeured thel'eih, are arranged in with the axes of rotation at t-ltu jmim n s "cedrelatien lengthwise of bar 62. so that pilts in substantially the plane ht'it-ht t emitting edges 81 Of the knives will turn luptetl cutting mlgt-s of knife-Natl I an interrupted cutting' edge extending The pressure exerted hvmthe ml 1e Qhwi se ofthe supports. against the tear fat-e of the printing, p 1-6 he pressure; exert-111g devicesarranged to he shavmhayil'l thus he applied: in

so beyond the .tebear against l llii rear face of the print; tia ll mincitlent with the-line of it in g plate, hrenexemplified as mnprmng mi uptetl cutting edge fmlnetl h tfltla-l dependently S ringpressed rods 88. laterblades. 13) this arrangement thetp all O S ltlOXl'G Telatiye to ledgefil anti prw :ittl'l tlt't of the printing plate 1 an Vi with l l h le Contacting parts in; ward itmfigitl suptmrt. instant-ml as lllt d' 8 I f O lQI'S artjmn' cave snrfat-e of the trough for.(letemuhitil 'ydlie' g t t v athe thivknvsh- 0f the nine. which Shall I $1.. fitlvl fitlvil't fate 3, of left by the knives as a hat-king fmtin-9131p! b bflweell ace-"l? gm $0 that ing surface. for reducing the unw nd )1- the rollers are respectively positioned in the ing plate to uniform thickness taklia l spaces between adjacent knives The itsprinting sin-face Tlhe px 'essare n;t.n peripheral contaqtingsui'facesof tho' r'nllem devices exortilig pressnreagainstthe pr t -itlri'piefertibly'arijan ed to cqnta et thep l ing pl'ate so as to tigiilly hpl d' the ean 1 mg Plat V DQ131151 p m ntl" g y" ward the rigid sttppnrtin snlmtantially l A antert'tlpte i cnttingetlge formed cutting path 'of the knives, a lso, pi e t. y' knife'blfldes 91 llllel'lfulll'mmi chattering 0f the printing plate tinting, lit etherein. i v shaving pp'eration'. v r

- ln order that thenessute e xertmg dei- 'llu-[nn'tterial of the -n'int'in'iz plate viees lttay be remove "as a ttll1, t f h up yieldingeontpatei l with the fittpPOlft a5 sh in me hani h n o de as anti are flexible plate 29. Tlmpres t e P @F t fe knives \"it-es ak't, to pl'eSs .the printing 11-a0 Pened,; msttlnced I firmly i pon the cmnpai'ati\jel if nail-q oeiv ed tesPeCtgwtly. m laterally :Xt8 t2" pressibleflexihle plate 29.80 that ii-legnlm ap r u e 9 l f in a pp g b l ties in the printing surface are smoothed 40 WhiQ'hjijfifififld IQBg hW I bill 6 and iroijterl out in the area auted'onfby the.

de ac m y eot rup n e t ep n ting edges. \ltlCll auve the. pla te to' an rear of recesses 91 ,aS by bOItS 9 us y fut-in thickness at its printing ptn'timis'.. dtllchihg. pl l o 1 7 62 The outward movement of the p the 'pr mechanism y be m z em t-ting devices is preferably .atlapl't, limited" hyextvntling th'e ends of lat i ingx-tliefl' an'w he' t ng dg y I- 'projergtjing blades; "0f knives (it) it gno ved Collectively for grlndtng the fit lpngitmlinal projection of-ynkps '90.: Thered's 88 are adapted to be independ ft ii' n -sllotiltlet t 106 tupontith [mi 1 n y Yilding'lYf/urged mltwm'dlYflmTl againsththich the einls 107 eflthe y P i l n by interposing helical ranged tlltlllflvlll) the' yo wsf are-thns, tn 01 prmgs :98 whiteh are co led about the refipfl nnll position, the peripheral c'ontaeti npf t ve e s 8',bet n' suit l n m'g m n fifties 0f P6116589 wilhpt'njeet- 'slightl 99 P h ar lyl l yon'd the enttingvtlgesof k'nitesfibii 55 the rods,;anjcl plugs 10 in t e PP S t -P id- N'hen support 44 is rotated, the ehtts of apertures 975: 'l ugs, 100 are ipre-feralily parts supported on ledge 54.0'f the's adapted to beadjastjed longitudinally go a will he moved tit-s the printing: pl it' tife-tqthe respective apertures 975st t0: positioned 'i'nti'en'gh; 171 by gage 20 s r E vary-the tension? of spi'tmg'is 98 m .des'n d shave thereait' icle 1I7'oftl" tending lengthwise of trough 11 above so that the proximate edge-109 e inner curved face and the edge of sheet 29 beneath the same will ,be contacted by the proximate face 0 pro'ecting' ed e 108, which is instanced-as' '10 un ercut ass own at 110 to conform to the contour of edge 109 of the printing plate.

Clamping-plate 19 is instanced as ivotally connected, as b hinges 11 1, to t e res ective end-walls 3 of the trough, so that t e clamping-plate may beswung back out of the way while positioning a printing plate 18 against gage 20 within the trough, .the gage bein adapted to be contacted by the of t e prlnting plate represented 20 at 116 )iioh is opposite edge 109. Plate 19 is adapd to be rigidly clam 'ed inoperative position by clamps 1 5 rotatably mounted .upon'the res ective end-walls 35 of the trough and provi ed with cam -clamping faces 12 I he gage coacting with clamping-plate 19 is exemplified'as a plate extending lengthwise of trough 11 within the same and conforming substantially to the curvature of the trough. The gage is instanced as suit,-

310 og-the gage and mounted within trough 11 beyond the respective 'ends'of the shaving.

mechanism. The supporting aiyns are preferably provided with bearing-enlargements 119 intermediate of their ends, The bear- 5 ing-enlargements are provided with bearingopenings- 121 by means of which the arms are'a'dapted to be rotatably adjusted upon bearin surfaces 122, instanced as formed upont e. outer facesofprojections 46 of the 50 beating-blocks at the respective ends-0f trough 11., Gage 20 is preferably secured to ends 123 of the supporting arms,'which are instanced as extending within trough 11 to aposition proximatetoplate' 29 and outside of the longitudinal projection of the shavingmechanism', so that the gage is adjustably supported between the shaving 1 mechanism a'njdisheet 29.. Interference by the gage with the rotary movement of the shaving mechanism is thus avoided,

The ;opposite ends 124 of the farms sup red portin gage 20, are preferably connectedb'y a hen le-bar 125, so that the arms may be; spaced apart paths in the printing plate at combinedly oscillated .u on their respective t bearing-surfaces122.. he 'eupportipg arms 27 thereofilanihaving its edge the trough when in clamping position a o a curv printing plate positioned within the trough,

-faces 122.

.- mg plate to a uniform andsmooth and regu:

distance between the are instanced 'as clamped in adjusted positiens upon bearing-surfaces 122 by thumb screws .126. The thumb-screws are preferably supported in threaded apertures 127 in bearing-enlargements 119, and are arranged to clampingly engage the wall of an annular slot 128 in t e respective bearing-sun By thus clamping the gage in place it will be positively positioned, so that when a number of printing plates of the same size are to be shaved, the lates may be properly positioned without 0 anging the gage, by suocessivel contacting an edge of the respective p ates against thegage.

In operation, the printing late 18 whichv it is desired to reduce to uni orm thickness at its printing portions, is placed within trough 11, face down, upon late 29, the printing plate being positivey positioned within the trough by gage 20 and clamp 19. Thedistance between the cutting-path of the cutting edge of theshaving mechanism and plate 29, having been relatively adjusted, by laterally positioning bar 62 upon ledge 54 and by the interposition of paper sheets 31 between the trough and plate 29, support 44. is rotated to move the shaving means across the rear face of the printing plate;

Rollers 89' exerting pressure against the .95

printing plate substantially in line with the-- lnterrupted cutting, edge of the shaving knives attheinterruptions'therein, will urgethe printing surface of the printing plate toward its support,.so that the thickness of the grintingportions of the printing plate, acts on by the knives, will be uniform throughout "for reducing the printing plate to h'usniform thickness along spaced apart pat By shifting the printing plate lengthwise of its support until the knives-are opposite the spaces between the previously shaved paths, the printing 'plate may be. similarly reduced to uniform thickness along such spaces, thus reducing the printing portions of the printing plate to, uniform thickness throughout'the entire area of the printing plate, and shaving the rear 'face of the printlar surface throughout.'

If, after a shaving operation-.a'sj thus de scribed, it is'found that the uniform thicknessof the printing plate should be'further reduced, an additional sheetor sheets, 31'

may be interposed between plate 29nd trough 11 to accuratelll adjust the relative nivesf and plate 29, and the shaving operation, then repeated; The'printing' pllate may thus betaccurately need to exact y the desiredjuni form thickness, it being understood thatafter shaving eachzadjus'tment of plate 29' relative to the l plate to a uniform thickness at its printing athe: platealon "vionsly shave l aeams lengthwise oftrough ll tosimilarly shave the spaces between theprejustment of plate 29 relative to the knives is made. The shavingslare removed through a cleaning hole 131 in the trough.

I laving thus fully described my invention,

Letters Patent, is: p

l. The method of reducing a printing what I claim as new and desire to secure by portions, which consists in supporting the v printing plate at its printing surface and shaving'the rear face of said printing plate;

a plurality of times in nonincident separated paths while applying pressure to said rear "face in the spaces between said paths.

2. The method of reducing a printing 'pl'a te to a uniform thickness at its printing portions, which. consists in supporting av printing plate "at its printing-surface and shaving the rear face of said printing plate in a. line having interruptions therein while applying pressure to said rear face in the interruptions in said line, said pressure applied in an interrupted line which when extendd, is substantially coincident with said first-named line.

3. The method of reducing a printing plate to a uniform thickness at its printing portions, which consists in supporting a .printing plate at itsprinting-s'urface, shaving.

the rear face of said printing plate in sepa; rated paths while applying pressure to said Tear face in the spaces between said paths, causing relative movement between the sh aving instrumentalities and said printing plate and. shaving along the spaces' between the previously shaved portions in the rear face of the printing plate while a. plying pres sure to said previously shaver portions;

' 4, The method of reducing a printing printing pntaand means for applying pressure'to'said. rear-face located in the interruptions i said cut-tin edge". and substan a1 linewith saidmterrupted cutting edge platesthe combination of a support for the- "printing (plate, ,shaving means comprising cuttinge gas and presser parts alternately arranged for acting on the-plate, and mean;

paths, before .a further. ad-

for causing shavin movementbetween said shaving means ant support:

II the combination of a snpport for the printing plate, shaving means comprising cutting edges and p'resser parts alternately a rrangcd for acting on the plate. said cutting edges being longer than the widths of said prcsser parts, and means for causing shaving movement between said shaving means and support. 8. In a machine for shaving printing plates, the combination of a rigid support-- mg face in the form of the sector of a e lindcr, a flexible supporting plate of uni orm thickness for the "outer face. of a curved printing plate, means for securing said print- In a shaving machine fol-printing mg plate-rclative to said supportii'ig. face,

A yfshaving means adapted to be moved across means for relatively adjusting the distance between said supporting plate and said shaw mg means.

3). In a device of the character described, the combination of a support for a curved printing plate, a support for shaving means extending lengthwise of said first-named support, a bar upon said second-named support, spaced-apa rt shaving nieans upon, said bar forming an interrupted cutting edge ex- F tending lengthwise of said supports, and

means for adjusting saidbarupon said second-named support. 1

10. In a machine for shaving printing plates, the combination of a support for the printing plate, and shaving means for the the rearface of said pljnting plate, and' printing plat comprising knives and pre'sserparts arrang and to end, said knives being of gr eatet width than thewidth of said presser parts" w ereby the paths of said knives overla during a plurality of shavin operations between said printing plate and knives. i

11. In a. machine for shaving printing,

plates, the combination of asu port for the printing plate, shaving means ibr the printmg plate comprising knives and presse'r parts arranged end to end, said knives being .of greater width than the width of said presser parts, whereby the aths of said knives overlap during a plurality of shavin operations between said printing plate and, knives, and said presserparts normally'extending beyond the cutting'edges of said knives.

ing plate *eomprising knives and presser Q parts arranged end'to end, said knives lie-- mg of greater width than the width of said presser parts, whereby the paths of said 12., In a machine for shaving printing, plates, the combination of a supportfor the I printing plate, shaving means for the print-' knives overlapduring a plurality of shaving V operations between said printing plate an knives, said Presser-"parts normally extend- .the printing plate comprising printing plate, shavin ing beyond the cutting edges of said knives, andmea-n's for limiting outward movement of said resser arts.

13. In a mac plates, the combination of a support for the printing plate, shaving means for the printmg .plate comprising knives and ED658431 parts arranged end to end in repcate ulternation, said knives being of greater width than the width of said presser parts, said presser parts normally extending beyond the cutting edges of said knives, and means for adjustlng the pressures of said presser parts.

14. In a machine for shaving printing plates, the combination of a rigid for the printing plate, shavin means 'for knives and presser parts arranged end to end in rcpca'ted alternation, said knives being of greater width than the width of said prcsscr parts, s'aidxpresser parts normally extending beyond the cutting edges of said knives, means for adjusting the pressures of said presser parts, and means for moving said shaving means toward and from Salt rigid 1 support.

15. In a machinefor shaving printing plates, the combination of a support for the a printing plate, and shaving and pressure 30 means comprising knives and presser rollers alternately disposed lengthwise of said support, the contact lines of said knives and presser rollers with the'printing plate on said support being substantially coincident.

16. In a machine for shaving printing plates, the combination of a support for the and pressure means comprising knives an presser rollers alternately disposed relatively to said support,

the con-tact lines-of saidiknives and Dresser rollers with the printing plate on said su port beingsubstantially coincident, and t c said knives being wider than said prcsser rollers.

17. In a shaving me 113 for printing plates, the combination a rigid support,

' inflexible plate'for said. support, shaving means comprising cutting edges and presser I between parts alternately arranged end to end for actingson the plate, means for adjusting said flexible plate toward and from said support, andmean's for said shaving means and said sup port. 1 I 18. In a machine for shaving curved printing plates, thecombination of a rigid support having'a supporting surface of substantially the form of a sector of a cylinder,

anauxiliary flexible non-compressible supporting plateflcomplemental to said rigid support, shaving means havin a path of movement concentric with sai supporting surface, a gage for a curved printing plate adjustable between said path of said shaving means and said rigid supporting surface,

ine forshaving printing support istlltl gage,

causlng shaving movementporting surface.

said shaving means and said gage havin coincident axes, and a clamp coacting wit 1 said gage and foianinga stop for said printing plate during the shaving.operation.

19. In a machine for shaving curved printing plates. the combination of a support having a supporting surface curved along the curvature of a sector of u cylinder, shaving means having a path of move ment concentric with said sector of said cylinder. a gages'upported for movement-in a path concentric with said first-named path between said first-named path and said su porting surface. asto coacting with said gage, and means where y to'adjustably position said vgage, and said shaving means and gage having coincident axes. 20. In a machine for shaving curved printing plates, the combination ofia sup-. port having a supporting surface curved along the curvature of a sector of a cylinder. shavingm'eans having a path of move mcnt concentric. with said sector, and a gage supported formovement in a path concentric with said first-named )lllll between said first-immcdpath and said supporting sur-. face, means whereby to adjustably position i and a clamp coacting with said" gage for clamping the curved printing plate. 21. In a machine for shaving printing plates, the combination of a support for the printing plate, and shaving means for' printingplate comprising knives and p resser parts arranged alternately end to end, said pres-seiparts arrangei'l for combinedsremoval from said machine.

22. In a machine 7 plates, the combination of a support for'the printing plateya second support, a bar, cut ting means thereon, a second bar, presser means thereon, said.- cutting means and presser means when assembled arranged al-' shaving means upon said susport comprising a plurality of cutting e ges extending lengthwise of said vcurved supporting sur- .face, said cuttin edges having spaces between "them, s'ai cuttingdges being uniformly s need from said curved supporting surface( uring said relative movement be* tween said support and said'curved supportpressure excrtin means y1eldingly urge 311i said toward said curved suping surface, and upon said support first-named spaces the combination of a support for a printing plate, a longitudinally extending supportthe combination of in' member, shaving means comprising knives pro ectmg from said supporting member in longitudinally spaced relation,

said knives forming an interrupted cutting edge extending lengthwise of said supporting *niember, recesses in said supporting memberbetween adjacent knives, and 0116.5- suru exerting devices received respective y in said recesses, said pressure exerting devices normally urged outwardly beyond said cut ting edge at the interruptions therein and in the plane of said knives.

26. -In a device of the character described, a support for a printing plate, a longitudinally extending supporting member, shaving means projecting out- \vardly from said supporting member and forming an interrupted cutting edge" length- \viso of said supporting member, pressure exerting devices between adjacent shaving means, said pressure ingl urged outwardly beyond said cutting edge at the interruptions therein, means upon said pressure exerting devices arranged to contact said adjacent shaving means to limit themoveu ent of said pressurc exerting deviot-s beyond said cutting edge.

27. In a device of the character described,

the combination of a curved support for the n a device of the character described,

printing plate, a supporting exerting devices yield outer face of a curved printing plate, shaving means spaced troni said support and ex- .tendiug lengthwise thereof, said shaving means adapted to be moved across the rear face ot" said curved printing plate, a gage extending lengthwise of said support between the path ol said shaving means and said support. said gage being adjustable along the curvature of said curved support, and means for locating said gage in adJnsted positions,

28, In a device of the character described} the combination of a curved support for the outer face of a curved printing plate, bearings at opposite ends of said support, shaving means,cxtcnding lengthwise of said support and journaled in said bearings, said shaving means spaced from said support and adapted to be moved across the rear face of said curved plate, a gage extending lengthwise of said support between the path of' said shaving means and said support. sup ports .tor said gage Journalcd on said bearingslmyond the respective ends of said shaving means whereby to ad ust said gage along the curvature of said curved support. 29. In a machine tor shaving p'rlnting plates, the coinbmatlon of a support for-the means for the printing plate coin 'iri'sing bar, sha ring knives and presscr devices-1nountcd upon said'bar and alternately disposed lengthwise thereof, said 'prcsscr devicesarrangedfor f combined removal from said supporting bar.

In testimony whereof. I have hereunto signed my name in the presence of two sub- J scribing witness LESLIE \V.

\Vitnesses:

Anna M. llan'rnn,

LAUREN on J. Vans.

,LAYBOUR-N.

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