US1669909A - Printing-form holder - Google Patents

Description

May 15, 1928. 1,669,909

L. H. MORSE PRINTING FORM HOLDER Filed July 6, 1926 2 Sheets-$heet 1 FIG. 2

gwucnloz May 15, 1928.

L. H. MORSE PRINTING FORM HOLDER Filed July 1926 2 Sheets-Sheet 2 I I8 iv Patented May 15, 1928.

1,669,909 UNITED STATES PATENT OFFICE.

Inwiumcn n. MORSE; or CLEVELAND, oHIo, ASSIGNOR To THE mnmcan MULTI- GRAPH COMPANY, or CLEVELAND, 01110, A-COBPORATION or 01110.

rmnrine-ronm HOLDER...

Application med my a, 1926. Serial no. 120,619.

This invention relates to printing devices. An object is to provide a flexible printing form. which will be cheap to manufacture and which will securely retain printing slugs andhold them in proper position for printing. A furtheryobject is to, provide a printing slug retaining device, employlng parallel 'rails, which may be quickly mounted on and. removed from a printing bed without disturbing the type The specific object is to provide a simple andconven-ient printing form for use on a niultigraph or other machine of that character.

In the multigraph, forexample, the drum which supports the printing "slugs has been provided with T headed rails rigidly secured to the drumat their bases. To sosecure the rails, various methods have been followed,

the best perhaps being to form the drum from reasonably soft metal, machine grooves therein parallel to the axis of the drum, mount the rails in the grooves, and then rivet the metal, between the grooves, down tightly againstthe base flanges of such rails. Obviously however when this is done, the rails must be left permanently on the drum. Fur'- their-{metal which will readily rivet over is comparatively expensive, and the grooves must be carefully machined, so thateach adjacent pair of rails will be practically the same distance apart in order that uniform slugs may be used.

By my invention I am enabled to use simply a cylindrical drum having asm'ooth out- .cr surface, thereby saving considerable machining cost, and the drum may be of any 'metahhaving sutiicient strength, for example cast iron. Also, I have overcome certain .objections to having the rails a permanent part of the drum. Further advantages and features are hereinaftermore fully explained. The essential characteristics will be sum- .marized :in the claims.

y In carrying outmy invention I employ a sheet of suitable metal having .upst-ruck lugs arranged in;rows, certain of the lugs of each pair of adjacent rows extending toward each other to form in ,efi'ecta shallow, dove-tail groove. The railsare formed in the general shape. of standard railroadrail, the flanges atuthe bottom beingcom'paratively thin to fit the groove and the heads being so spaced thatstandard multigraph type slugs may have a reasonably close sliding fittherebetween.

In the drawings Fig. 1 is a transverse cross-section through a printing machine such as the multigraph, the paper feeding mechanism, the delivery mechanism, and other parts, being omittedyFig. 2 is a fragmentary plan of one end of the printing device forming the subject of my invention; Fig. 3 15 an enlarged fragmentary cross-section showing the sheet metal base and a number of rails retaining typeslugs; Fig. 4 is a fragmentary perspective view showing thesheet metalbase, the rails and a number of type slugs carried thereby; Fig. 5 is a perspective view of one of the rails; Fig. 6 1s a perspective View of the slug retaining means such as shown in Fig. 4,; Fig. 7 is a perspective view of the-type slug.

Referring in detail to the drawings and indicating the various parts by suitable characters A represents the base and frame of a printing machine, B a printlng drum carried thereby shown as comprising an arcuate type carrying portion 0 and circular end members D. The drum may be carried by a-shaft such as E extending therethrough and'supported by the frame A. -An impression roll is indicated at F.

In order that various printing forms made in accordance with my invention may be used interchangeably with the same printing machine withoutchanging the drum, I may form the sheet metal base as indicated at 1, which may be wrapped around the arcuate portion G of the drum :3 and hookechas at 8, over marginal ribs C at one end, and similarly hooked over a rib G of a pivote'd plate Gr, shown as supported by the drum shaft. Means suchas a series of set scre\vsI I,onc'being shown as hearing against the end ofthe portion C, may be used to tighten up the blanket and cause it tofirmly'embrace the peripheral surfaceof the drum. inking means may comprise the ribbon J shown as fed from rolls R. v s

As shown most clearly in Fig. 4, the

blanket has parallel corr ugationsfi, from the tops of which corrugations extend lips 6.

shown these lips are alternately placed along the corrugations. firston one side of a given corrugation and then on the other side. If desired theselips maybe oppositely disposed or arranged in any manner, with i or withoutthe,corrugations} example, I. may use any one of the constructions 'shown in the following patents: Clifton Chisholm, No. 1,438,580 William Deming, No. 1,438,584; Burnie J. Craig,'No. 1,438,582. The particular form herein shown disclosed in tlie-copendin W. Macklin,Serial No 76,298.

The T rails 10, which may be conveniently formed as shown in Fig. 5, each have amentral web 11, T shaped heads IQtan-d base. flanges 13, these flangesb'eing coiiipaliatively' thin in order that they maybe slid between thQ IOWS of -lips 6 of adjacent corrugations without necessitating forming the lips at any considerable distance from the general outer surface of the base plate. If desired the rails nay be further secured by immersion of the blanketand the bases of the rails in a solder bath. .fThe type, shown in Fig. 7, may be individual slugs 15, one for each letter as shown, or a longcrslug containing several letters if desired. The slugs 15 have head portions 16 and base portions 17 separated by groovesls substantially the width of the flanges which form the railheads. As shown in Fig. 3, the bottom flanges of the slugs may .rest against the web portions of the rails to provide for alignment. I i Any means may be used for holding the type slugs in place, such for example, as by spring clips, one being shown at 20, Fig.6 as having downwardly extending portions 21 with grooves 221therein arrangedto fit over the T heads of adjacent rails, the spring of the material forming such members 20, being suflicient to retain the member in place once it-is slipped between such adjacent rails. i I

It will be, understood that the device may be used either on a drum or a flat type bed, ince if the blanket were tolie flat, different shaped rails might-be provided to use the same slugs which are standard or the arrangement could be reversed and the same rails usedwith'thinner type, It will be also seen that, with the type removed, the blanket may be laid flatter shippingand storing, since the rails, will simply approach each other to allow such flattening.

,From the above description it will be seen that by reason of the reduced cost of material usable in the drum and of the fact that the drum does not have to be grooved as before to provide for mounting the rails, the expense involved is materially less, even with the i'cost of the blanket taken into account. Another advantage is that the blanket can be easily removed for storing with the typein place, whereas by theformer ahead of time; that is to say, While a given job is being printed, another composition may be made up on a different blanket without'involving material cost as compared application ofJustin claim lmetal member having rows 0 with having to provide several" drums, and, in" addition, having to 'tie up the machine while a drum is being replaced.

Havingfthus described my invention, .1

1. 1h printing device comprising in com- "bination*a- 'plurality of T headed rails, type slugs adapted tobe retained by the heads, a sheetmetal base/adapted to be wrapped around a printing drum to present said type for printing, said sheet metal base being formed to retain the rails in position thereon;

2. A printing device comprising abla'nliet formed; of sheet material having portions thcreofsevered and bent upwardly toflforin lugs, said portions beingarranged 'in'rows, certain of thel'l'ugs extending in-one direction and others extending in the opposite direction, and rails having 'groovcs'in their o'ppositesides which rails are retaiiidin place on the blanket parallel witheach other and spaced apart by reason of said lugs en gaging the base flanges of the rails beneath the grooves." Y

I 3. A printing device comprising a" sheet metal member having separated corrugations therein, lugs extending from the tops of said corrugations, each being severed along one edge andjoined to the corrugations at tlieother, and type retaining rails having flanged bases adaptedto be. slid underthe saidprojections and to be retained against lateral movement with reference to the corrugations b the'saidcorrugationsf A'printing' evice comprising a sheet metal 'ine'mber having upstanding parallel corrugations with lips projecting laterally inopposite directions from the tops of the corrugations a plurality of rails groovedon the opposite sic es to present overhanging heads and projecting base flanges, said rails occupying the spaces between corrugations and held in place by lipsenga ing the base fla11ge's,and type" grooved on their opposite sides occupying the channels between the rails, the heads of the rails occupying the grooves of the type.

51 A printing device comprising a sheet metal. member having lugs upstruck therefrom in rows, and type-slng retaining rails having flanged bases adapted to be held against said member by the lugs which overlap the base flanges,adjacent rails having space between them adapted to receive the feet of a row of grooved type. i

6. A printing device comprising a sheet upstruck lu rails having grooves in their opposite si es and retained inplace by the lugs, and type members extending between the rails and retainedby means of projectionson thetype members occupying said grooves. 1

In testimony whereof, I hereunto afiix my signature.

LAWRENCE H. MORSE".

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