Патент USA US2135150код для вставки
‘NOV; 1, 1938-_ ' H. P. SCHMIDT , I 2,135,150 PRINTING mass cymmma Original Filed Aug. 14, 17934 2 Sheets-Sheet 1 ‘ INVENTOR 8% P ATl'O-RNEY ‘ _ * Nov- 1, 1933- ‘ H. P. scams-r _ PRINTING PRESS 2,135,150 CYLINDER I ‘Original Filed Aug. 14, i934 _ 2 Shoots-811601‘. '2 ll/ _ . a; wvEmpfinz : BYM ' ’ z ATTORNEY .1 . .‘PetemediNJv. 1,1938! : . STATES’ PATENT ‘OFFICE . , 'l f v Q j 7, 2.135.150. ‘We rnnss '_ ' r.‘ Schmidt, New York, N. Y., asaignor to ‘ H. H. Heinrich, Inc., New York, N. 1., a cor-v poratlon New York Application August 14, 1934, ‘Serial No. 139,745 _ Renewed March as. 193': 6 (Cl. Mil-415.1) This invention relates to improvements in 'face.and va ' ‘ ‘blank space respect to the‘ printing press cylinders vand'rneans for mounting printing plates thereon. In particular my inven tion relates to that type of.v printing cylinder 5 which employs rubber or other‘ resilient sur; vention to provide a printing press cylinder‘hav ing a printing plate removably mounted thereon faces and which is used in the process commonly ina-manner that will present the equivalent .of known as rubber'plate printing. Such cylinders an unbroken printing surface. are particularly adapted for use in rubber plate printing presses using quick drying aniline inks, 10 this combination providing high speed produc tion with the minimum ‘of make ready time and without requiring the services of a highly skilled pressman as in other forms of printing presses. In rubber plate printing presses a web of paper is is passed between an impression cylinder and the cylinder carrying the rubber [or other resilient printing surface in order to impress the printing surface upon the paper.‘ It is a desideratum that ' the surface of the rubber plate be continuous in printing results. ‘ - v I » _ - . It is therefore’the principal object of my in I ' , ’ It is another object of my‘ invention to provide a printing press cylinder having a rubber or other resiliently surfaced printing plate removably 10 mounted thereon in a manner that will present the equivalent of an unbroken printing surface. Another object of my invention is to provide novel means of attaching a rubber printing plate _to' a segmental cylinder. Another object of my invention is to provide novel means of drawing together segments of a divided‘ cylinder. 1 v 'IAnotherobiect of my invention is to provide 20 order that the printing therefrom be unbroken; . ' ’ new and novel‘means for securing a segmental Maintaining a continuous and unbroken sur faced rubber plate has heretofore been accom cylinder'to its supporting and operatingshaft. plished by having continuous and unbroken ‘sur will readily appear as the nature of the inven- - with these and other objects in I' view which ‘ faced cylinders with the rubber or resilient sur- . tion is better‘ understood, the same consists in face processed directly on to the cylinder surface. It is obvious however that in such cylinders that for each change of design a separate cylinder is the improved construction and novel arrange ment and combination of parts which .will be. hereinafter fully described and fully'pointe‘d out required or that the design then on the cylinder -‘ . in the appended claims. In the accompanying drawings has been illus be destroyed when replacing it with another. '_ 7 My invention further relates to the provision of segmental cylinders with' means for tightly stretching a metallic printing plate around the circumference thereof when the segments are ' drawn together and in such manner as to pre sent a substantially continuous and unbroken printing surface. limitation is necessarily made to the precise, - structural details therein shown, but that changes, alterations and modifications within the scope of the appended claims may be resorted to when desired. It has heretofore been proposed to furnish a segmental cylinder with means for tightly ' stretching a metallic printing plate around 'the 40 trated a‘ simple and preferrediform of the.in vention, it being understood however that no circumference of the cylinder when the segments are drawn together. Such devices are shown in United States Patents Nos. 1,730,122, 1,795,700, 1,795,702 and 1,860,765. These devices disclosed in the prior art do-not, however, provide an un broken printing surface such as that provided. in ‘printing press cylinders where the design’is processed directly on or into the surface of a cylinder having a continuous and unbrokensur ‘face, in that the metallic printing plate in its . In the‘ drawingsi ’ 8.5 . a _ Fig. 1 is a cylinder completely assembled and mounted on its supporting shaft, and having a rubber or other resiliently surfaced plate re movably mounted thereon; Fig.2 shows one of the halves of the cylinder illustrated in‘Fig. 1, the shaft upon which the completely assembledcylinder is placed, the re lationship of the rubber or‘ other resiliently ‘45 surfaced printing plate to the cylinder, and a sectional view of‘ the retaining collars; of the outer meeting edges of the cylinder seg Fig. _3 is a sectional view taken through A-A of Fig. 1 looking in the direction of the arrows; 60 Fig. 4 is an end view of a completely-assembled ments, or the construction is otherwise such that cylinder as shown in Fig. l, and entirety is bent inwardly over ‘rounded corners the plate surface is not continuous. In such - ~ Fig. ‘5 is an end view of two halves of the cyl construction an inactive space of appreciable 55 width is disposed longitudinally of the plate sur- ' ' Referring to the drawings in. detail, wherein 55 inder alone. ' I ' " . - 2,185,150’ similar reference characters ‘designate corre spending parts throughout the several views: I is the two halves of a hollow cylinder, each having end walls 2.. The end walls 2 of each cylinder half are provided with slightly less than half of a bore 3 suitable for clamping engagement with shaft 4 on which the two cylinder halves I are to be mounted. The printing plate 5 which in‘ one form thereof is shown as having a rubber 10 or other resilient printing surface consists of a base 8 composed preferably of ?ne mesh screen wire to which a rubber surface is vulcanized, al though a thin sheet of metal or fabric such as heavy canvas or other suitable material may be '15 used for base 8. In some cases it may bevdesired to use a thin all metal plate, with or without base 6, instead of the resiliently surfaced plate shown. _ ing line. It will-also be obvious' that I can pro vide like means to those shown for engaging ends of a plate at I8 where spacer I1 is now provided and thus mount individual plates on each of cylinder halves I. It will be obvious to those skilled in the art that I have provided a printing press cylinder having a printing plate, which in one embodiment may have a rubberv or other resilient printing surface, ‘removably mounted thereon in a manner that will 10 present the equivalent of an unbroken printing surface, and thatI have provided new and novel means for attaching such a printing plate to a. divided cylinder, ‘with an indistinguishable meet .‘ ing line at the abutting edges thereof, and that I have provided novel means for drawing the halves ‘of a divided cylinder together, and for securing the divided cylinder to its supporting The plate 5 is most conveniently attached to the cylinder halves I when they are removed from ~_;and operating shaft. 20 the shaft 4. The abutting ends ‘I of the rubber Having thus _ described my invention and 20 portion of the plate 5 are placed to extend slightly. pointed out the features‘ which are new, what I beyond the edges 8 of the cylinder halves I, to claim is: I ‘ compensate for the thickness of the base 8, and , - 1. A' printing cylinder composed of two halves the ends 8 of the base 6 are turned inwardly of 25 the edges 8 of the cylinder halves I where they are secured by compression between bars Ill and the surfaces II of cylinder halves I by screws I2. It is- to be. noted that edges 8 of the cylinder halves I are quite sharp, being preferably just 30 short of a cutting edge and that due to sloping the cylinder walls as at 8', clearance is provided of a cylinder, means mounted in each of the’cyl inder halves for clamping an'end of a printing plate, and means for forcing the cylinder halves together, said last named means consisting of collars mounted on reduced end portions of said cylinder halves and screw means in said collars engaging extended portions of the printing plate - between the turned in portions of base .8 except 2. A printing cylinder comprising two semi at edges 8. The sharp edges 8 of the cylinder halves I are also important when it is desired to 35 use a thin all metal printing plate since the meet ing line, formed when the edges of such a plate cylindrical parts having opposed parallel periph are bent over and held as shown, is practically indistinguishable. The cylinder .halves I are then placed upon the shaft 4 and a spacer plate 40 ll of approximately the same thickness as the two turned-in ends of base 6 is inserted between the edges I8 of the cylinder halves I. The cylin der halves I are then closed together su?lciently .to permit collars I3 to be slid over the reduced end I4 or the cylinder halves I. The bars 45 portions III extend outwardly of the cylinder halves I and ' project into the cut-out portions I5 of the collars I3. Through one wall of the cut-out portions I5 of the collars I3 projects screws I8 which engage 60 the outwardly extending ends of one of the bars III. The outwardly extending ends of the other bar I0 engage the opposite walls of the cut-out portions I5 of the collars I3 to those through which the screws I6 project. ‘Turning the screws‘ 55 I8 forces one of the bars I8 toward the other bar 30 clamping means. eral edges and cut away portions beveled in wardly therefrom providing clearance progres sively increasing away from said edges and to 35 ward the axis of rotation of the cylinder, a print ing plate backing disposed around the cylinder - and having opposite ends extending therein through the clearance aforesaid and compressed 40 between the opposed parallelperipheral edges of the cylinder parts, means for securing the ends of said backing in the cylinder, a printing plate secured to the backing around the cylin der and having opposed edges meeting and sup ported by the portions of the backing compressed between said opposed peripheral edges of said cylinder parts, and means for forcing the cylin der parts together to effect the compression of ‘the portions of the printing plate backing as aforesaid. _ 3. In a printing cylinder, a plurality of cylinder segments having opposed parallel peripheral’ edges and cut away portions beveled inwardly there from providing clearance progressively increas I0 thus closing the cylinder halves I together and compressing the turned-in portions of the base 6 and the abutting ends ‘I of the plate 5 together. ing away from said edges and toward the axis of rotation of the cylinder, a resiliently surfaced In collars I3 are mounted set screws I8 which are said printing plate having a basemember- the ends of which are turned inwardly of said cylin 60 60 then turned to engage the reduced end portions ll of cylinder halves I and bind the bore 3 to the shaft 4 and to prevent displacement of the col printing plate extending around said cylinder, .der and through said clearance and compressed between the’ opposed parallel peripheral edges lars I3. By‘having the printing plate 5 slightly, of the segments thereof, the ends of the resilient shorter in dimension than the circumference of portion of said printing plate being abutted to the cylinder it isv tightly stretched around the gether under compression and supported by the cylinder when thecylinder halves I are forced compressed portions of said base member to form together as described. It will be obvious that an unbroken continuously supported printing screws I6 can be used to compress the turned-in portion 9 of the base 6 and the abutting portions 70 ‘I of the plate.5 to any extent necessary in order to form the equivalent of a continuous unbroken printing surface. In event of any irregularity in the meeting of abutting portions 1 of plate 5, '75 trimming or pressing of the edges may be resorted to in order to provide an' indistinguishable meet surface. 4. In a printing cylinder, 8. cylinder'compris ing a plurality of cylinder segments assembled together and having opposed parallel walls pro viding for meeting only at the periphery of the. cylinder, a resiliently surfaced printing plate having a ?exible base member extending around said cylinder, said base member having end por 15. ‘ . v a . g, , 7 8,185,150 tions compressed at the periphery of said cylinder to form a continuous surface, and the meeting edges of the resilient‘portion of said printing plate being compressed together to form a con " tinuous printing surface, the compressed end por-~ tions of said base member providing rigid contin uous support for the meeting edges of said re silient portion of said printing plate. 5. In a printing cylinder, the combination of a' 10 printing plate having a surface of resilient mate rial and a base member, disposed around a cylin der composed of a plurality of segments, means for. mounting said segments‘ upon'a shaft ‘to form the cylinder comprising protruding shoul 15 tial walls thereof, said cut away beveled por tions beginning at the periphery of said cylinder and extending inwardly therefrom and provid ing for peripheral meeting of said cylinder halves, a resiliently surfaced printing plate ex 6 tending therearound, said printing plate having [a base member the opposite ends of which are turned inwardly of and secured inside the cylin der halves and portions of which are compressed between the peripheral meeting edges of solid 10 cylinder halves and the resilient surface of said printing plate having abutting edges meeting un'. . > der compression and overlying the compressed portions of said ‘base member, and collars ders on the cylinder segments extending longi . mounted upon reduced end portions of said cylin tudinally along the shaft, collars adapted to ride der halves, said collars having means for forc on said shoulders, screw means on said collars ~ ing together said cylinder halves to tightly draw for pressing against ‘ longitudinally extending , strip-like members, a pair of said members, said ,, 3 r, said base member around said cylinder, halves, compress ‘portions of the base member between screws in said collars being adapted to draw the‘ the peripheral meeting vedges of said cylinder 20 backing of said printing‘ plate tightly about said halves, and compress together the ‘abutting ends ' segments and to compress the meeting ends of of the resilient portion of said printing plate . the resilient material so .as to form a' continuous overlying the compressed portionsof said base and uniform printing circumferenee'about the member, said compressed portions of said base member providing rigid support for the abutting -25 '6. In, a printing cylinder, the combination of ends of the resilient portion of said printing plate two cylinder halves assembled together to form so that a, circumferentially continuous design is a cylinder, said cylinder halves having opposed printed therefrom. ‘ ' -' segments. ' l cut away beveled‘ portions in the circumferen ' 1 t ' HARRY P. SCHMIDT.