US903342A - Method of bending printing-surfaces. - Google Patents

Description

B. 'U'HANL Mmmm of mmm@ mmm sum-AGES.

ULA'TUN lLBJ JAI'L 1905A $993,342. Patented NovK 10,'1908.

2 SHHBTS-SHBET l.

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B. F. UPHAM.

METHD OF BENDING PRINTING SURPCES.

APPLICATION FILED JAN.15, 190s.

903,342. Patented Nov. 10, 1908.

2 SHEETS-SHEET 2.

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10 One of the great obstacles to the use'rof a BURT F. UPHAM, OF BOSTON, MASSACHUSETTS, AssIGNoR To sOUTrreATE OF BOSTON, MAssAOHUsETTs, A. OOBPORATIONOE mssAOHUsErrs.-

mamon or BENDING rnrmnrsunrscas;

STATES, PATENTOFFIOE.'

menuisier oo Naeoaae. sparsam-ion efnstfmrsmc. resented Nev. 1o, loos.`

sppucmon sita new; 15,1905'. ssi-ni Ruoss.

To all whom it mayconcem: substantial extent ;the .distortion-amount" Be it known that I, BUM` F. Ummm a citivto one-ei hth of an :a niediumsizuel zen of the United States, and a lresident of plate. JT j'com'pletes the processffor one l Boston, in the countyl of Suffolk and Complate, but the otherisll'eated until practically' 5' monwealth of -Massac usetts, have invented .all its-backing hasbeen" rneltedoi, as'. by. so

" ,certain new and useful Improvements in .Methods of Bending Printing-Surfaces', of

which the following is a full, clear, and ex- .act description.

placngit upon the `heated `curved. surface 4 shown in F1g, 5',- or othe rwi se. 1 -Thegeleetrotype shell thus denudedof bac andfstill in its elon` ated condition, ist en attened without' a ecting-s'chdisto' ion, as indi- 65- two-color press` employin both at. and'cy- .lindricalfprinting' surfaces as .been the rac-4 're ister.- In a companion application of' the superficial. longationyof'-its '15 eySerial-IIo.V 409,805, I 'have' disclosed i curved compsnion,iwill' aceuratel register ze.

tical-impossibilitysof making such s aces methods whereby :this can be accomplished in' suchQa'manner as to bring the curved late into' exact register with its atoriginal' he .-processf be" such that all.'superciai.

-. 351B the; resent application,- I set forth-'Ia t methodw eroby I permit thecurved plate to' rominsuperelally elongated, andprovide' .notI with their original.

this s electrot usual manner. Fig. 2 4is a secon l l :plate similarlybackei. 3 and 4 repre- "sent the'sameplate's eacl curved to t the 'der on which one of, them is to be `Minused" P '5 illustrates one of4 the plates .hs lim backing melted off.; Fig. @shows upon which one thereof is to bepractice; plates thus formed, and.4

. wt correspondence, the duplc te electrotype shells are bo'th laid fiat backeilup egon .to an cesslve thickness, and then planingthe latter down t6 in aecordanee'with. resent' igs. 1l and 2.1llistrating t e two 'the' reference numerals 1 and. 2 designatin| the shells and backing, respective] Both plates arethen placed. acefoutwar upon a suitable convex' surface 3 of the curvature of the: cylinder used, `and made to accurately confbrm thereto.- This elongates the printing surface of each 'to a .embrace therein any such the usual"way, 'asfillustratedinFig...r The u .resultant -flat. pletev beingthus' made torewhich' sre'slmost squ y useful emplo' e forelectrotype shel1s,"it is also ap- 4'plic'ab to other printing. surfaces,- as photos engralvedjplates, `and the like. Further,, the

piocesseanbe-carried out, though in a lees te P rfect'rn'iannen'by mounti giax'faAuss'v upon a f orm of.baclri1gng other tm' the fusible backingigescribed, and detaching lgue of .'the 'sanIie rn bar cking prioittr attening it. tis' i e aso.,toso`so 4 a backing, as byliepgsapp 'ed to a metallicone, or moistureto an organic composition, that.the.'-e'urved print surface ,can be plication Serial. No.. 409,805; yet `it is -m some similar ll/xhore easily per- .formed inthe usuali' oiioes f 'Iliave'deseribed 's process asia plcable Lto tre te" of flat an curved printingfsuijface biilit is evident that.' it can also'hew-used for preses having a plurality'of cylindrical. rmting surfaces of dif- 'fering .dametrs. 'cned :when I use the expression-in theclailiis, of ffdissimilarly contoured-'printing sura'es," I desi to as well as a datand a f v 'ndrfs-al printing surface.

lnequal cyliiiiiers surface.f"' The 4t of fog'which tlmugs 'process is partiglearlybut there" aregiothe'r.(applications-thereof the .eleetrot shell after having its backing flattened' .f'jjr'ithoutfaffecting its /iicquired thusremove ,and then'iiattenegandF' .7 elo ation... s

illstratestlus shell again backedup t. tho'ugh 'isfniethod of -b{d1ng printing 40 Figa-842 show steps in my 'rnodiiedprocess surfaces -ia not'so pe .t rieitheoretically NS n order to bring the two plates 'to an exas thatdescbedfmm s 'companion ap- -radius of the others cy Although I have described the two plates asbeing Ilient to exactl the same curve, I find that when the bac the one to be flattened, the electrotype shell thus unbacked is released from a condition of slight resilient strain, and hence recovers the merest fraction of its elongation. Consequently, I prefer to bend such plate upon a form 3 of slightly less radius than the form upon which the other plate is bent. The difference is so small, however, that I call their curvature equal. In the modification of my rocess for thus e?ualizing the Vsuperficial' istortion` of a purality of une ually curved plates, the same results can e' accomplishe ing up oneL'of thetwo plates to double the thickness given'to the-otherg bendin the extra heavy plate on a c linder of haf the inder; routing or turning ofthis extra-heavy backing to the same age as the other, 'and then flattening it. T e double amount of bend-given to the heavy plate, causes adouble; eongationsaf its pn'ntin surface ascompared with tie other, whidli is halved byits final flattening lifter the excess -of backing 'has .been removed. This process-is carried out by the steps represented in Figs. .8 to 12 of the drawings; F'U. 8 showing an .electrotype shell 1 backed up -to approximatel double thickness as compared with the s ell 1 'in Fig. 9. The two backed plats'are then., bent in the concave molds 3,l 3b, or upon' convex forms 3 as shown in Fig. 4 the 1mportant oint be` that the curvature of,

.the m01 3 shall e substantial] sharper than that of the other mold. Vghere' the lates are being repared for a press with a at bed, the d erence in radius should b9 about one half, but where the. two lates are fo'r a press having two cylindrical). surfaces. of different radius, will not be the same. The heav backing is then routed off to the dotted line'3" shown in Fig. 10, to brin the plate 'to the. same thickness as the ot er late in"the:'rnold 3b shown in 11;'. The iormerly heavy plate is now flattened,l as indicated in 12, and

the' excessive distortion given thereto by its :first bending is sufliciently countracted to bring the two printin surfaces tq`an equality in. elongation, am? tion in re ister.

What claim as my invention and for g is melted from by back- Printing.. the proportion being so treated `that its., l

equal that of .the curved, .-c

a consequpnt perfeci which I desire Letters Patent is as follows, to Wit; f 1. The herein described method of bringing tw'o dissimilarly contoured printing surfaces into register, which -consists in similarl and e ually bendin the two properly bac ed audaces, and t en changing one thereof to its desired contour without affecting its superficial distortion.

. 2. e herein described method of bringing two dissimilarly contoured printing surfaces into register, which consists', in similarl and equally bending the two backed su aces, then -removin'g the backing from one thereof, changing it to its desired vcontour, and finally reback' it.

3. The herein describe ing two dissimilarly faces i'nto register", larly bending the two backed surfaces, applying heat to the backing of one in order' that 1t cah be bent to its desired contour without affectin its. superficial distortion, and then so ben mg it. .I r 4. The herein described method of bringcontouredv printing surwhich consists. in smiing twp dinsmilarlycontoured printing sul?? faces s tuegitr. whish www is simi* larl bendin "thetwo surfaces backed with. a fusi le meta melting the bac surface, flattening it, and finally re ac it 5. The herein described method of-b'rmging a fiat and a curved electrot e. plate into'- exact register, which consists m, providing- A the two electrotype shellswth a'fusible 90 meltinglghe backing inthe usual manner, similarly and; equally bending both,"- from one thereof, flattening t shell, and finally rebacking it. 6. The herein described metlid,` 0'f ing a [lat and a Icurved electrot e plate in toj; register, which consists in ba'zin flat elcct-rotype shells, bending bot and fretuining. oneto a at condition.; betweqlipthgA latters curving and 'flattening its .backing superficial' elongaiinbacke In testimony that I claim' .tlie 'fore o ing invention, I have .hereunto s et han this f- Bm F'UP Witnesses:

A. B. UPHAM", M. C. GATES.,

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