US1651295A - Printing-press cylinder for enabling the printing, impression, or offset surfaces to be adjusted - Google Patents

Description

Nov. 29, 1927. 1,651,295

J. SHUTT WORTH PRINTING PRESS CYLINDER FOR ENAB G T v NTING, IMPRESSION, OR

' OFFSET SURFACES TO B D TED I Filed June 23, 1924 ,3 Sheets-Sheet 1 Nov. 29, 1927.

J. SHUTTLEWORTH PRINTING PRESS CYLINDER FOR ENABL ING THE PRINTING, IMPRESSION, OR OFFSET s FACES r0 F1 June 23 BE ADJUSTED 1924 3 Sheets-Sheet 2 /////////4/////// @d h it R N S2 um .u r 1 IT! W I ,v w W W I m EEm 1 \min 9 'Patented Nov. 29, 1927.

UNITED STATES PATENT/OFFICE.

JOHNSHUTTLEWORTH, OF ALTRINCHAM, ENGLAND, ASSIGNOR TO LINOTYPE AND MACHINERY LIMITED, or LONDON, EN

GREATBRITAIN.

GLAND, A LIMITED LIABILITY COMPANY OF SURFACES TQ Application filed June 23,1924, Serial No This invention relates to improvementsin printing press cylinders for enabling the printing, impression or 0 adjusted. V

When plating the formcylindersoi printing presses, itis frequently necessary to adjust a'plate in a' direction longitudinal of said cylinders, so that in the case of a cylinder having two plates in side by side relationship, the marginal space between the opposed plate edges may be increased or decreased for the purpose of producing a wider or narrower marginbetween the resultantprinted matter or, in the case of a plurality of co-operating cylinders, the printed matter onthe plates of thelrespective cylinders'may be brought into correct register. f I Y r It is also desirable for' corresponding longitudinal adjustmentscof the co-operat- -ing blankets of offset presses to be made relatively tothe axes of the impression or offset cylinder shafts, andlalthoughin the constructional form of the invention hereinafter described, a form cylinder i's' referred to throughout, it is to be understood that the invention is equally applicable to ffset surfaces to be impression or transfer cylinders or sections thereof.

The object of the present invention is to means: including an arrangement for enabling the respective cylinder or sections thereof to be adjusted longitudinally on the respective cylinder shaft.

'The invention will'now bejdescr'ibed by accompanyingdrawings in v I reference to the.

which 1 9 Figure 1 1s an end elevation of onecon- -struct1onalform of said lnventlon;

1 generally'on the line.2 2 of Figure 1;

r Like reference constructional form ofthe invention F1gure 4 1s a long tudinal sectlontaken larger scale.

Figure 3 is an end elevation ofasecondj.

I numerals: indicate like BE Anausrnn.

721,611, and 'in Great Britain July 5, 1923.

parts in the different arrangements illustrated. I I

In Figures 1 and 2, wherein the invention is shown as applied to a form cylinder adapted to have plates secured thereon in side-by-side relationship, the said cylinder is constructed of two main co-axial parts or sections 1, 2, both secured to the same shaft 3, as by dovetail or other splines or feathers 4, which admit ofthose sections moving on the shaft only in endwise direction. Each of the sections 1,2, is provided with means for securing thereto one or more printing forms; in the example illustrated in Figure 1, accommodation is provided on the section 1 for two printing forms which are respectively designated by the numerals 5, 6. The means for attaching these forms to the section- 1 and for stretchingthem thereon are not shown in the drawings, as they constitute no part of the present invention.

"At the outer side of each of the cylinder sections 1, 2, the shaft 3 has rigidly secured :to it an arm or bracket 7, in. which is journalled a set screw 8 l whose inner end is threaded into the adjacent end of the respective cylinder section, say the section 1, so that by turning this set screw, the said section will be traversed in oneor other direction along the shaft 3 to move-the forms 5,

theforms on the cylinder section 2. By these means either of the sections 1, 2 with the forms thereon can be moved nearer to or farther from the other one, aswhen one of the two set screws 8 is adjusted, or both of the said sections can be moved outwards or inwards by turning both of these screws.

The set screws 8 are each prevented from moving-axially ingthe respective bracket 7 in one direction by the head of said screw, and in the other direction by a collar 9 fast Figure 2 is a longitudinal section taken.

on the screw, while means 'suchas lock nuts '10, are provided for preventing unintentional rotation of the screws and axial movement of the cylinder sections 1, 2.

To. permitof two printing forms carried by the same cylinder section being co-axially adjusted independently of each other, each such section,'as. shown in Figures 3 and 4;, 'is formed of two independent segments 11,

6 on that section nearer to or farther from 12 or 13,14. These segments are adjustablev axially, but not otherwise, on the form cylinder shatt 3, this restriction being conveniently imposed, as in the before de scribed example, by slidably connecting said segments to the shalt by splines or feathers 4, and, it desired, ll i adjustment of each oi.

the segments may be etlectcd by set screws similar to those hercinbel'orc described in connection with l i ure 2.

By reference to Figure :3, it will be seen that the two segments ll, 12, as do also the segments ,li l-l, abut against each other along the line 15, and that the contacting surfaces here involved, are free to slide relatirely to each other in a direction parallel with the axis of the shaft By reference to Figure l, it will further be seen that; the general contour elf each of the two segments 11, 12 or 13, let dillem .irom that of the other inasn'iuch as the parts thereol which contact with the shaft 3, are in staggered relationsideof the respective bracket 7 at the outer ship and intercalate each with the other, with a suiiicient all owance of room between them to admit of the aforesaid sliding movement.

In the example now not review, the different segments are so connected together that the two 1]. and 13 or 12 and 14: can be simultaneously adjusted from either end of the cylinder or adjusted independently of each other as occasion may require. For this purpose a screw shalt 16 extends longi tudinallly through said two sections which, to avoid unnecessary circinnlocution, are here assumed to be the segments 1]., 13, although the description equally well applies to the segments 12, 14. This screw shaft 16, lSrlOtfltilbljrT supported at each end in a bracket 7 last to the shaft 3, axial movenient thereof being prevented by collars 17 fast to one end of the screw shaft on either side of the bracket 7 at the opposite end of the screw shaft 16 there is secured a similar collar 11? and at its extreme ends the said shaft is oil? square or other non-circular form so as to enable it to be engaged by a correspondingly shaped key or spanner by which it can be rotated.

At the Ilflflil liflild end oi the screw shaft; 16 (as viewed in Figure 4) there is provided the screweii portion jlR which is tln'eadcd into the adjacei'it end of the segment 13, and at the opposite end of the said shaft passes axially through a bush 19 which extcr nally screw-threadcd to engagewith the CO1:- i'csponding end of the segn'lent 11, the threads on the parts l8 and 19 being one right-inhaled and the other lett-hani'lei'l. The outer end of the bush 19 is termed with a flange 20 integral therewith, having peripheral holes or recesses 2L tor receiving a toniuny or like implement to enable it to be turned about its axis, and adjacent to this flange there is rigidly secured to the screw shaft 1(5,a collar against which the flange that means are provided for limiting the angular motion between the bush 1E) and the screw shaft 16, said means consisting of the beforeinentioncd screws 24 removably attached to the flange 20 and engagin with arenal slots 25 in the collar 29, the length of these slots beinn suflicient to provide for any such slight adjustment of segment 11, as might be called for by a form having been inaccurately positioned thereon.

When, with the before-described er "angen'ient, it is desired to sin'uiltaneously adjustboth of the cylinder segmentsll, 13 inwards or outwards, the lock nuts 23 are released, and the screw shaft 16 is turned in the direction necessary to effect said adjustment, the bush 19 at this juncture, rotating as it integral with the screw shaft 16 and therefore moving the segment 11 in one direction, while the screwedportion 18 of said shaft 16 moves the segment 13 in the reverse direction. ing a material increase or decrease opt marginal space between the forms on the segments 11, 1S. Vhen, however, a form is inaccurately positioned on the segment ll, this This adjustment serves-for effectcan be remedied by loosening the lock nut- 23 engaging the end of thelatter, slackening the screws 24, and; turning the bush 19 relatively to the screw shaft 16 and thereafter tightening the said loch nut and screws. In

tioncd on the segment 13, the neccssaryadjustinent is effected by loosening the look not 23 engaging the end of the latter, looseningr screws 24, and turning the shaft 16511 the required dilrectitm, subsequently tightening the respective lock nut 23 and the screws 24. It the arcual lengths of the slots Qobe iusuliieient to admit of the full adjustment of the inaccurately positioned form,

the screws 2% can be temporarilyremoved the case of a form being inaccurately posideparting from the spirit of the invention.

Having described my invention, I declare that What I claim and desire to secure by Letters Patent is v 1. The combination with a printing press cylinder and the shaft of said cylinder, of a plurality of co-axial cylinder'sections and means operable from either end of the cyl- V inder operative to adjust said sections axially on the shaft alternatively either siniultaneously or independently of each other;

2. In a printing presscylinder, the combination of a plurality of co-axial cylinder sectionseach comprising a plurality of separate circumferentially aligned segments and means operative to adjust said segments independently'in a direction parallel with the axis of the cylinder either simultaneously or independently of each other.

3. In a printing press cylinder, the combination of a plurality of co-axial cylinder sections each comprising a plurality of separate circumferentially aligned segments engaging the cylinder shaft by parts intercagaging the cylinder shaft by parts intercalating with each other and means operative to adjust said segments in a direction parallel with the axis of the cylinder either simultaneously ,or independently of each other.

In testimony whereof I have affixed my signature hereto.

JOHN SHUTTLEWORTHQ

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