US1396056A - Impression-adjusting and blanket-ironing device - Google Patents

Description

0. L. RAABE. IMPRESSION ADJUSTING AND BLANKET IRONING DEVICE. APPLICATION FILED IAII.2. I92o.

1,396,056. Patented Nov. 8,1921.

- ToV alli whom t may concern.'

' UNITED STATES PATENT oFFlcE.

OTTO L. RAABE, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO R. HOE AND CO., OF

' NEW YORK,VN. Y., A CORPORATION OF NEW YORK.

IMPRESSION-ADJUSTING AND v13LANKET-IRON'IN'Gr DEVICE.

Patented Nov. 8, 1921.

Original application led January 22, 1917, Serial No. 143,584. Divided and this application filed :ranuary 2, 1920. Serial No. 349,009.

Be it known that I, O'rro L. RAABE, a citizen of the United States, residing at Jersey City, county of Hudson, and'State of New Jersey, have invented certain new and useful lmprovementsin Impression-Adjusting and Blanket-Ironing Devices, fully described and representedv in the following specification and the accompanying drawinds, forming a part of the same.

l'his invention relates to certain improvements in printing machines, and this application is a division of my co-pending application Serial No. 143,584, 'filed January 22, 1917.VV

' Certain. classes ofprintingfmachines, particularly'the fast rotary web machines, are rundu'ring the printing operation at very high speed. The cylinders of these machines are heavy and the high Speed at which modern printing conditions require them to be .run causes a fthrowing or jumping which produces-a bad impression and heavy strainand considerable wear von 'the press, this being particularly so in machines employing'long cylinders of sayV siX or more pages wide.

'In thisr class of machines the impression cylinder is provided with a blanket of some comparatively resilient material to eifect a good impression. After these blankets have been in use for some time, particularly where the printing is ,done from plates arranged in the same position on the form cylinder, the spaces between the plates or margin spaces, cause bolsters or ridgesin the blanket and these ridges are liable to cause breakage of the web at such points, and also are liable to` produce a bad impression. It is the object of ,theV present invention to produce an improved construction for supporting the impression cylinderso as to prevent this throwing7 or jumpingwhen the cylinder is 'running at high printing speed and by whichthe impression cylinder may be adjusted to vary the impression, this construction being such that it will not obstruct convenient access to the running parts of the press.'

It is a further object of the invention to i produce a 'construction'which will iron or smooth out the blanket on the impression cylinder so as to avoid the objectionable bolsters or ridges and keep the blanket of a smooth and even surface throughout.

, The invention consists in= constructions for effecting this and other objects not specifically referred to, such constructions including novel parts and arrangements shown inthe accompanying drawing in which Figure l is a side elevation, partly broken away of 'so much of a rotary Vprinting machine with the invention embodied therein as is necessary for an understanding thereof.

Fig. 2ris an enlarged detail partly broken and partly sectional View of the impression cylinder support and adjusting means,.and

Figi-3 is a. broken, partially sectional side view of the construction illustrated in Fig. 2. Referring now to the drawings, the invention has been illustratedas embodied in a rotary printing machine in whichV the printing members are cylinders, and in which but one printing couple has been illustrated, but it will be understood that the invention may be employed for as many couples as there are in the machine, the construction being duplicated for the impression cylinders of each couple.

As shown, the moving partis of the machine are supported'in frames l of any suitable construction. The printing mechanism shown is a rotary couple including a form cylinder 2V and an impression cylinder 3. The form and impression cylinders are preferably for economy in space andl convenience in arrangement, arranged vertically of each other with the impression cylinder below, this arrangement having certain advantages. The form cylinder may be inked in lany usual manner, but, as shown, is inked through a pair of distributing rolls 4 receiving ink from a distributing cylinder 5 which is supplied with ink from a fountain 6 through a fountain roll 7, distributing ductor rolls-8, 9, and aV transfer roll 10 located between the two ductor rolls. Machines embodying the invention will include mechanism for supporting the impression cylinders, and for adjusting the impression. Where Ithe impression cylinder is a blanketed cylinder means for ironing or smoothing out that they may be given a vertical adjustment l to and from the impression cylinderwhereby the cylinder may be adjusted to and from Y its cooperating form cylinder to vary the impressions. These rolls are, as shown, spaced from each other and Contact with the surface of the cylinder at points on opposite sides of the vertical axis and extend substantially the length of the cylinder forming in effectv a cradle in 'which'the cylinderV rests, the rolls thus effecting a support for the cylinder. 1

These rolls may be mounted invarious waysso as to have this vertical adjustment, but preferably are so mounted that they may be moved simultaneously lan Yequal amount soas to get an even supporting and adjusting movementfor the impression'cylinder. As illustrated, these rolls are Ymo'untedon shafts 14, 15, each of which has at each end a reduced end 16 which takes bearing in an eccentric rotatable sleeve 1.7 eccentrically mountedin bearing blocks 18 secured to the baseblocks 11 bymeans of bolts 19,v or in any other manner,'the-rollsbeing free running in the' sleeves. Each .of the sleeves is formed with a gearr20, and these gears are operated through actuator gears 21, 22,*in mesh with each other, one of these actuator gears, as

22, being carried on a shaft 23 having squared ends 241 project-ing beyond the blocks 11, through which it maybe operated by a hand crank from Veither side of the machine. By operating the gear 22 the gears 17 on yeach of therolls 12, 13 are equally rotated .and the center of each of the rolls yconsequently 4simultaneously and equally moved, causing a like movement of the impression cylmder and evenly adjusting the impression as desired, andfurthermore, this A adjustment may be effected while the ma-f gears are prevented from rotating after adjustmentA in any suitable manner, as by a latch 26 pivoted on one of the bearing blocks 18.

v.lhen the impression' cylinder is a blanketed cylinder as shown in the present embodiment of the invention, the blanket being n- In these blocks dicated by the numeral 25, these rolls 12, 13 are preferably made of hard metal so that they will act as ironing or smoothing rolls to smooth or iron out the blanket on the cylinder and prevent formation of bolsters or ridges Vcaused byl the plate margins. These rolls, therefore,efiect the functions of supporting and adjusting the impression cylinder andY of ironing out the blanket of 'such cylinder wherea blanket is employed. 'While these impression, adjusting land `ironingrolls may, of course, be omitted from couple,`it will be understood that in the l machine embodying the invention in its best form, such rolls will be provided for the imf `pression cylinder of each printing couple,

the construction and operat-ion of the rolls in each case being the same.

l/Vhile a simple and convenient construction for effecting the purpose of the invention has been illustrated and described, it will be understood that various changes may be made in the type of rolls employed and in the means for operating the rolls to effecttheir various functions, and that the invention -is not restricted to the arrangement shown.

What I claimgis: y l y Y 1. In a printing machine, the combination l with a form andY impression vcylinder arranged verticallywith the impression cylinder below, of a pair of rolls located below the cylinder and on opposite sides of its vertical axis and on which the cylinder. rests, and means forY adjusting the. rolls .to vary the impression. l y A 2. In a printing machine, the combination with a form and impression cylinderv ar-` ranged vertically with the impression cylinder below, of a pair of rolls located below the cylinder on which the cylinderrests, eccentric bearings for thev rolls, and meansfor simultaneously rotating the bearings for adjusting the rolls to vary the impression.

.3. In a printing machine, the combination of an impression cylinder, of a'support, for the cylinder loca-ted below the horizontal axis thereof onwhich the cylinder surface rests, a-nd means for operating the support while the cylinder is in contact therewith for adjusting the impression. l

4. In a printing machine, the combination of an .-impression cylinder, of supports located below the horizontal axis of the cylinder and on each side of the vertical axis and on which the cylinder rests, and means for moving the supports tor-adjust the impression while the cylinder is in contact therewith. Y g Y Y 5. In a printing machine, the combination with an impression cylinder, of a pair of eccentrically mounted rolls located below the cylinder on which the cylinder rests, gears on the rolls, an actuator, and means for oper. ating the actuator for Simultaneously rotating the gears for adjusting the rolls against the cylinder.

6. In a printing machine, the combination with a form and impression cylinder arranged vertically with the impression cylinder below, of a pair of rolls located below the cylinder on which the cylinder rests, eccentric bearings for the rolls, gears carried on each of the rolls, an actuator cooperating with the gears, and means for operating the actuator for simultaneously rotating the gears for adjusting therolls against the cylinder.

7. In a printing machine, the combination with a printing couple including a form and impression cylinder arranged vertically with the impression cylinder below, of a blanket on the impression cylinder, a pair of hard metal ironing rolls below and contacting with the blanket and extending substantially thek length thereof for ironing out the blanket, and means for vertically adjusting the rolls against the cylinder.

8. In a printing machine, the combination of an impression cylinder, a blanket thereon, and a hard metal ironing roll extendin substantially the length of the cylinder elow the same and in pressure contact with the blanket Jfor ironing out the blanket throughout its length, and means for adjusting the `roll to vary the impression.

9. In a printing machine, the combination of an impression cylinder having a blanket thereon, and a common means acting to adjustably support the impression cylinder throughout its length for varying the impression and to iron out the blanket throughout its length.

In testimony whereof, I have hereunto set my hand.

OTTO L. RAABE.

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