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Oct. 22, 1946; A. BRAUNWORTH 2,409,830 ‘PRINTING PLATE CLAMPlNG MECHANISM Filed ,Feb._ 16, 1943 ' 4 Sheets-Sheet 1 11%.1 6\\\\\ 6 INVENTOR, /? Max/U? ) A 770/?”5 y Oct. 22, 1946. A. BRAUNWORTH 2,409,830 PRINTING PLATE CLAMPING ‘MECHANISM Filed Feb. 16, 194:5 ' 42 4 Sheets-Sheet 2 45 404542, 6'26 434?4 ‘m4 INVENTOR. 45 // V . I Wee/d.” ‘ aka/“mod? ’ Arron/Vt)’ " oct'zz, 1946. - A. BRAU‘NWORTH ' 2,409,830 PRINTING PLATE CLAMPING MECHANISM Filed Feb, 16, 1943 - 4 sheen-sheets J12:- 15- 111:.‘ iiT2~--7. 20 ' as 33 /////7 87 2/5 "Z: W 1, w - Z? 30 1 INVEN TOR. Bl’é: ‘4 A rro/zwsf' 06L 22, 1946- A. BRAUNWORTH 2,409,830 - PRINTING PLATE CLAMPING-MECHANISM Filed Feb. 16, 1945 4 Sheets-Sheé£ 4 ivlun-I Li ,2 A QTQ nsuuuulmmf INVENTOR. ATTORNEY Patented Oct. 22, 1946 2,499,830 UNITED ' STATES PATENT OFFICE 2,409,830 . PRINTING PLATE CLAMPING'MECHANISM Albert Braunworth, Queens V,_illa.ge,,N‘. Y.,,,assign or to R. Hoe & 00., Inc., New York, poration of New York 17., a cor Application February 16, 1943, Serial No. 476,109 3 Claims. 1 . This invention relates to printing plate clamps, and more particularly to clamps of the type em ployed to secure a plurality of rigid plates on the plate cylinder of a rotary printing machine. , In printing practice, where stereotype or simi lar plates are. employed, the plates are clamped on the plate cylinders of a rotary printing press by means of clips which overhang the bevel edges of the plates andby which the plates are clamped against a suitable abutment, so that they are rigidly ‘held in position during the printing op ((31. 101—378) 2 neously actuated for plate clamping and plate releasing movement by a single radially-disposed operating.instrumentality or tool from locations inside of, the cylinder bearers. A speci?c object of this invention is to provide an improved plate clamping mechanism for clamping relatively rigid printing plates on a printing cylinder having bearers at each end thereof, and whichmechanism includes a plu rality of plate clipsadapted to engage an edge of a printing plate, each clip being movable ‘in a eration. In printing certain products, the print recess in the cylinder by a screw threaded clip ing is usually effected on printing machines in rod, a gearsecured toeach clip rod, a rotatable which the plate cylinders are eapacitated to carry member meshing with each gear to simultane a number of plates widthwise or. in the direction 15 ously rotate the gears and clip rods upon rotation of the axis of the cylinder. Theinner plates are of the rotatable member, and means for rotating clamped between the conventional center ring the rotatable member by a radially-disposed tool and the longitudinally slidable inner clips, and from a. location inside of the cylinder bearers to the outer plates are clamped between the inner thereby simultaneously rotate the clip rods to clips and the conventional end clips. 20 move the plate clips to and from clamping en Each plate cylinder cooperates with an impres gagement with the plate. sion cylinder to provide a printing couple, and A more “speci?c object of this invention is to each cylinder of the couple is provided with con provide an improved plate clamping mechanism ventional bearer rings at its terminals, and these for clamping relatively rigid printing plates 1on a bearers or rings operatein rolling contact in order > printingcylinder having» bearers at each end tomaintain the printing components of the plate thereof, and ‘which mechanism includes a plural and impression cylinders in accurate printing ity of plate ‘clips adapted to engage an edge of aprinting plate,- each clip being movable in a re The .end clips are usually moved to, and from cess in the cylinder by a screw threaded clip rod, relationship. , i . clamping engagement withthe outeredgeof the 130 a ?rst gear secured on each clip rod, an inter outer plates by rotatable screws or clip rods which mediate gear‘ meshing with the ?rst gears, a bevel threadedly engage the clips. These clip rodsare gear rotatable with the intermediate gear, a bevel rotated from the end of the plate cylinder by a pinionmeshing ‘with the bevel gear, and means suitable tool or wrench, and in order to locate to rotatably support the clip rods, the intermedi the Wrench-engaging portion of each clip rod for ate- and ‘bevel gears, and the bevel pinion inde pendently of the cylinderbearers. convenient accessibility, the clip rod extendslon gitudinally through an aperture formed in the It is ‘also an object of this invention to provide bearer at, a location adjacentdts outer or periph a plate clamp'of generally improved construction eral surface. whereby the device will be simple, durable and in .This arrangement has proven unsatisfactory in so expensive in construction, as‘ wellas convenient, commercial use, because the heavy impression practical, serviceable and e?icient in its use. pressure imposed on the cooperating rollingbear With the foregoing and other objects in view, ers sometimes causes them to crack or rupture which will appear as the description proceeds, at locations adjacent the apertures through which the invention resides in the combination and ar the'elip rods extend. rangement of parts, and in details of construc It is, therefore, an object of this invention to tion hereinafter described and claimed, it being provide an‘ improved plate clamping mechanism understood that various changes in form, propor which is constructed and arranged for plate lock tion, and minor details of construction may be ing and plate releasing operation from a location made within the scope of the claims without'de inside the bearers of the plate cylinders, and in 50 parting, from the spirit or sacri?cing any advan which the components are operably supported tages of the invention. independently of the bearers. For a complete ‘disclosure of the invention, a It is also an object of this invention toprovide detailed description of it will now be given in an improved plate clamping mechanism in which connection with the accompanying drawings a plurality of clamping components ‘are, simulta 55 ‘forming a part of‘ the speci?cation, wherein: 2,409,830 3 4 Figure 1 is a fragmental plan view depicting a preferred form of the invention; Figure 2 is a longitudinal sectional view taken on the line 2--2 of Figure 1; Figure 3 is a fragmental end elevation, parts pinion 23 and its stub shaft 28, and this socket is radially disposed in order to receive a radially disposed operating tool or wrench T, indicated by dotted lines in Figure 5. Each spur gear 2| is secured to a clip rod 35 (Figure 2) that has a reduced portion formed at Figure 4 is a fragmental transverse sectional its outer end which is rotatably received in a bear ing aperture 36 formed in the'arcuate plate I6. view taken on the line 4—4 of Figure 1; ‘ Each clip rod 35 is provided with an inwardly Figure 5‘is a fragmental longitudinal sectional 10 extending threaded portion or screw 31 which view taken on the line 5-5 of Figure 1; ‘ is threadedly received within a threaded aperture Figure 6 is a fragmental end elevation depicting formed in the body portion of an end clip 38. a modi?ed form of the inventioryparts appear appearing in section; .Each end clip '38 is provided with an upstanding ing in elevation; Figure 7 is a fragmental'plan view‘ depicting a further modi?cation of the‘invention; ' " clip segment 40 having an overhanging dove tailed lip 4| to engage the outer arcuate bevel edge of the outermost plate P in each longitudinal ' Figure 8 is an end elevation, parts appearing in section; and or axial row of plates, in conformity with the , Figure 9 is a fragmental longitudinal sectional view taken on the line 9—9 of Figure 7. Referring to the drawings, in which similar usual practice. Each clip 38 is mounted for longi ‘ tudinal sliding movement in a groove l2, and it characters designate corresponding parts, there is depicted a conventional plate cylinder IQ of a printing machine arranged to support a plurality of printing plates P. Longitudinally-extending recesses II are formed in the peripheral portion vofithe plate cylinder I3, and longitudinally-ex tending grooves l2 (Figure 4) extend inwardly is retained therein by opposed caps or bars 42 (Figures 1 and ii) which are suitably secured to the cylinder i0 and received within the recesses i l. The caps 132 are provided with bevel surfaces #33, which engage bevel surfaces 35 formed at the outer portion of each plate clip body 38, as best seen ‘in Figure 4, to thus slidably retain each‘clip ‘body 38 within its groove l2. Inasmuch as the clip rods 35 are held against longitudinal move ment, it is manifest that rotation of the clip rods ceive plate-locking components to be hereinafter 20 35 will cause the plate clips 38 to move longitudi nally within the groove l2, and the direction of described. An annular recess l3 (Figures 2 and 5) is movement of the clips being determined by the formed in each end of the plate cylinder I0 and direction of rotation of the clip rods. The plates P are circumferentially located on receives therein an annular bearer l5 of conven tional construction. Although only one end of the plate supporting surface of the cylinder ID the‘ plate cylinder has been depicted in the draw by‘ the engagement of the lateral or longitudi nally-extending edge of each plate with a bevel ings, itis to be understood that both ends of the cylinder are similarly constructed and arranged. lip 46 (Figure 6) upstanding from a conventional margin bar 41. The usual arrangement for as Arcuate plates l5 are received within the recess l3 and are secured to the cylinder ID by radially 40 sembling plates on a plate cylinder, which ar disposed screws ll (Figure 5). Each plate I5 rangement is well understood by those skilled abuts the inner axial terminal of a bearer l5 and in the art, is to locate the inner plates, not shown, forms a support for components to be hereinafter adjacent the center of the cylinder, and the in ner edges of the inner plates abut a conven described. < ' -An arcuate circumferentially-extending recess tional center ring, ‘not shown. The inner edges I8 is formed in the cylinder [0 adjacent the plate 45 of the outer plates P are engaged by conventional i [6 for the reception of a train of plate clip actuat inner plate clips, not shown, which also engage ing gears; ' This trainincludes two, spaced spur the outer edges of the inner plates. By this ar gears 23' which mesh with three smaller spur rangement, longitudinal inward movement of the gears 2i, and one of the smaller spur gears is end plate clips 38 causes the inner and outer positioned intermediate the spur gears 20, and 50 plates to be securely clamped to the plate cylin from the recesses l l and communicate therewith, and these grooves and recesses operatively re ' the remaining two gears 2! are located outside of-the spur gears 20, as best seen in Figure 3. Each spur gear 23 has a bevel gear 22 (Figure 5) der, in conformity with the usual practice. In operation, when it is desired to secure the plates to the cylinder, a suitable wrench or tool secured thereto or formed integral therewith, and T (Figure 5) is positioned in either of the wrench this bevel gear meshes with a bevel pinion 23 55 receiving sockets 33 (Figure 1) according to which is rotatable about a radially-disposed axis which socket is the more conveniently located, and which provides a driving member for the and by simply turning the wrench the engaged train, as will be more fully explained hereinafter. bevel pinion 23 (Figure 5) is rotated. The rota Each composite gear 20—-22 is rotatably sup tion of this bevel pinion rotates the meshing portedv on a stub shaft 25 which is rotatably re 60 bevel gear 22 and its spur gear 20, which, in turn, ceivedrin a bearing aperture 25 formed in an rotates all of the gears in the train, and, conse arcuate plate l5, the aperture and shaft being so quently, rotates the clip rods 35. The rotation of disposed that the spur gear 25 and bevel gear 22 the clip rods causes the upstanding clip segments rotate about a longitudinally or axially-disposed axis. Each . bevel pinion 23 is provided with 65 40 (Figure 2) to engage the outer beveled edge of the outer plate P, and thereby force the plates aligned stub shafts 21 and 28, which are rotat ably, received’ in radially-disposed bearing aper tures 30 and 3| formed in the cylinder l0 and a into engagement with their locking clips to thus securely clamp the plates to the cylinder sur face. From the foregoing it is manifest that an ef?- ' 32 is secured to the cylinder I0 by screws 34 (Fig 70 cient, convenient and quick-acting plate clamp ure 1) or other suitable securing devices. By this ing, mechanism has been provided which is en arrangement each bevel pinion 23 is rotatable tirely independent of the bearers l5, conse abouttan axis which is radially disposed relative bearing or cover plate 32, respectively. The plate to theplate cylinder I5. A rectangular tool-re- .. . quently' permitting the bearers to, present their ceiving recess or'socket 33 is formed in each bevel 75 maximum strength to resist the usual heavy imé' 2,409, 830 pression pressure, thereby avoiding frequent failure of the bearers in commercial use. A modi?ed form of the invention is depicted in Figure 6, in which form the components for rotat ing the clip rods 35 are identical with those here tofore disclosed, except that only two clip rods 6 clip rod gears and having axially alined inner and outer stud shafts rotatably received in cylin drical bearing apertures formed in the printing cylinder and the bearing plate respectively and disposed in radial alinement relative to the print ing cylinder, the outer stud shaft having a tool receiving socket formed therein at the cylinder are employed, and these rods are rotated by spaced gears 25 which are, in turn, actuated from surface whereby a tool may be inserted into the a single wrench socket 33 through an operably socket to rotate the gears and clip rods to thereby interposed bevel pinion 23, bevel gear 22 and spur 10 move the clips axially along the clip rods towards gear 20. or away from the printing plate. A further modi?cation of the invention is de 2. In a printing cylinder adapted to support picted in Figures 7, 8 and 9, and in this form of relatively rigid printing plates and having an the invention, two clip rods 35 are provided, and annular bearer recessed in the cylinder at each they are rotated by Worm gears 2| a, which are end thereof, an arcuate plate recessed in the cyl rigidly secured to the clip rods. The outer ter inder against the inner side of each bearer, a minal of each clip rod 35 is rotatably received bearing plate recessed in the cylinder immediately within a bearing aperture 360, formed in an adjacent an arcuate plate, a plurality of movable arcuate plate I?a. The worm gears Zla mesh Clips adapted to engage an edge of a printing plate with a worm 23a which is provided with aligned stub shafts 21a and 28a, that are rotatably re 20 which is supported on the cylinder, a plurality of clip rods each threadedly engaging a clip and dis ceived in radially-disposed bearing apertures 30a posed in axial relation to the cylinder and rotat and 3| a formed in the cylinder Illa and a bearing plate 32a, respectively. By this arrangement the ably supported in bearing apertures formed in the arcuate plates, a ?rst spur gear rigidly secured radially disposed relative to the plate cylinder 25 to each clip rod, a second spur gear meshing with the ?rst spur gears, a ?rst bevel gear rotatable I Do, and provides a driving member for the gears with the second spur gear, a drive bevel gear 2la. A rectangular tool-receiving recess or meshing with the ?rst bevel gear and having socket 33a is formed in the stub shaft 28a, and axially alined inner and outer stud shafts rotat this recess is radially disposed in order to re ceive a radially-disposed operating tool or wrench 30 ably received in cylindrical bearing apertures formed in the printing cylinder and the bearing T worm 23a is rotatable about an axis which is This arrangement provides a relatively simple construction in which a worm 23a may be oper ated by a radially-disposed tool at a location inside‘ the cylinder bearer, and this Worm rotates plate respectively and disposed in radial aline ment relative to the printing cylinder, the outer stub shaft having a tool-receiving socket formed therein at the cylinder surface whereby a tool the spaced clip rods 35 through worm gears Zia, to thus cause the plate clips to move into look may be inserted in the socket to rotate the gears and it is therefore desired that the present em bodiment be considered in all respects as illustra tive and not restrictive, and it will be further understood that each and every novel feature and combination present in or possessed by the mechanism herein disclosed forms a part of the end thereof, an arcuate plate recessed in the cylinder against the inner side of each bearer, a bearing plate recessed in the cylinder immedi ately adjacent an arcuate plate, a plurality of movable clips‘adapted to engage an edge of a posed in axial relation to the cylinder and rotat to rotate the Worm, worm gears and clip rods to and clip rods to thereby move the clips axially along the clip rods towards and away from the ing engagement with the outer plates of the plate printing plate. cylinder. 40 3. In a printing cylinder adapted to support It will be understood that the invention may be relatively rigid printing plates and having an embodied in other speci?c forms without depart annular bearer recessed in the cylinder at each ing from the spirit or essential attributes thereof, printing plate which is supported on the cylinder, invention included in this application. 50 a, plurality of clip rods each threadedly engaging a clip and disposed in axial relation to the cylinder Having thus described the invention, what is and rotatably supported in bearing apertures claimed as new and useful, is: 1. In a printing cylinder adapted to support formed in the arcuate plates, a worm gear rigidly relatively rigid printing plates and having an an secured to each clip rod, a worm meshing with the nular bearer recessed in the cylinder at each end , worm gears and having axially-alined inner and thereof, an arcuate plate recessed in the cylinder outer stub shafts rotatably received in cylindrical against the inner side of each bearer, a bearing bearing apertures formed in the printing cylinder plate recessed in the cylinder immediately adja and the bearing plate respectively and disposed in cent an arcuate plate, a plurality of movable clips radial alinement relative to the printing cylinder, adapted to engage an edge of a printing plate the outer stub‘ shaft having a tool-receiving which is supported on the cylinder, a plurality of socket formed therein at the cylinder surface clip rods each threadedly engaging a clip and dis whereby a tool may be inserted into the socket ably supported in bearing apertures formed in the thereby move the clips axially along the clip rods arcuate plates, a gear rigidly secured to each clip 65 towards and away from the printing plate. rod, a drive gear operably connected with the said ALBERT BRAUNWORTH.