US1927759A - Inking mechanism of printing machines - Google Patents

Description

Sept. 19, 1933. SPENCE INKING MECHANISM OF PRINTING MACHINES Filed July 14 1932 3 Sheets-Sheet l [mreniar JWCL Sept. 19, 1933. SPENCE 1,927,759

INKING MECHANISM OF PRINTING MACHINES Filed July 14 1932 5 Sheets-Sheet 2 I lm/emfmr WMM/MIQW Sept. 19, 1933. F. SPENCE 1,927,759

INKING MECHANISM OF PRINTING MACHINES Filed July 14 1952 :s Sheets-Sheet 3.

Patented Sept. 19, 1933- :P'ArsNTf F CE INKINIG, MECHANISM F rR 'rI G A;

CHINES Fred Spence, Sale, England, assignor to Linotype 7 and Machinery Limited, London, England Application July 14, 1932, Serial No. 22,419,

and in Great Britain July 17, 1931 v 8 Claims. (01. 101-356) This invention relates to inking mechanism of printing machines, and more particularly to mechanism comprising a set of ink distributing rollers which rotate continuously in one direction and work up the ink fed thereto from an ink fountain roller by a ductor roller which contacts alternately with an intermittently rotating ink fountain roller and one of the continuously rotated rollers of the ink distributor set, hereinafter termed the first distributor roller.

A principal object of the invention is to provide means for positively rotating the f ductor roller, during its swinging movement from the ink fountain roller towards the first distributor roller so that contact with the latter is' made onlywhen the two rollers are rotating at the same surface speed, thus avoiding shock and damage to the rollers and driving gear which would otherwise occur. l

A further object of the invention is to provide means for controlling the rotation of the ductor the invention contemplates the provision of adriven member located between the ink fountain roller and the first distributor roller-in such a position as to make'driving contact with the ductor roller at an intermediate stage of the before-mentioned swinging movement, the speed of such driven member being increased during a succeeding stage thereof until the ductor roller is rotated at the proper speed for contacting with the first distributor roller.

This same driven member is conveniently utilized for controlling the rotation of the ductor roller during its return swinging movement towards the fountain roller. For this purposathe speed of such driven member is reduced during such return movement, and while it is in'driving contact with the ductor roller.

The invention is hereinafter described with reference to the accompanying drawings showing one constructional form thereof applied to a machine in which a fiat bed is reciprocated beneath a printing cylinder. T f

In the said drawings:--

Figure 1 is a side elevation of the pertinent parts of the machine; Figure v2 is an'end elevation as viewed from the right of Figure 1, and

- Figures 3 and 4 are diagr mmat ic side eleva tions showing the mechanism at successive stages of its operation. v7 Referring first to Eigure's ,1 and 2, the inking mechanism represented comprises an ink fountain roller ,1, aductor roller 2 arranged to Qicontact-alternately with-said fountain roller and the first distributor roller 3, which, with the companion distributor rollers-3 3 39, and the ink drum 4, continuously rotates in one directionl The ink worked up by these continuously rotating inking rollers and drum is transferred to the set of forme rollers, herein des'ignatedas a whole} by the reference numeral 5, by which the ink isffinally appliedto the printing forme 6 on the reciprocating bed '7. f The means for controlling the. transfer. of ink to the forrne rollers and to the forme constitute no' par s:

the present invention and may be of 'any co'nvenientconstruction. 1 ii The above named driven member may be 5011- gt;

venientlyiin the form of a roller 8, hereinafter termed the starting roller, which is driven from the 1 reciprocating bed; In' the arrangement shown a spr'ocketwheel 9 on the end of the roller shaftmis driven byfa chain 10mm a sprocket- Wheel 111 fast on ashort shaft 12 exs ltending through the machine frame .13 and car; ryin'g at its inner end a,toothed wheeljM. The

wheel 14in turnmeshes with a' ge'ar wheel l5 drivenby a gear wheel 16 which rotates with a sprocket wheel 17 from which later aLch'ain I18,

passesto a second sprocket'wheel 19. The upper offa bell crank lever-2a whoseother arm is connected to a link 25 which is reciprocated by, a grooved cam 26 with whichengages a rollerf27 on the link 25. The axis of the shaft 22 about which the ductor roller 2 swings, is'so' "located with-reference to the axis of the starting roller 8 that the roller 2, during its swing towards the ink'fountain roller 1, breaks contact therewith.

It will be understood that through thereciprocations of the bed 7, the starting roller g will be H rotated alternately in opposite directions, and

. latter being also stationary. *As the bed moves from the position in which it is shown in Figure 1' to that in which it is represented by thefull,

the end of the printing'stroke of the bed; The

' positions of the bed and ductor'roller 2 reprethereof for the reversal. 36

sented in dotted lines in Figure 3 are those occupied at about the middle ofthe printing stroke.

In full lines in Figure 4, the bed 7 is indicated at the extreme rear end of the printing stroke where it is brought to rest prior to reversal, and the-ductor roller 2 just breaking contact with the starting roller 8, while the latter is at rest, dur ing its movement towards the ink fountain roller 1,-which' movement will have been commenced during the travel of the bed at its uniform printing speed and just prior to the deceleration The succeeding stage of the cycle of operations is shown by the dottedlineposition of the bed and ductor roller inFigure 4, thebedin. that position being in the middle of its return non-printing stroke, and-theductor roller 2:in contact with the fountain roller 1, where it remains until just prior to the completion of the non-printing stroke when it is again moved towardsthe starting roller Band contacts therewith at the end of that stroke as'i'ndicated in Figure 1. '9 1 The constructional fo'rm' of'the invention above described; and the particular cycle of operations described in connection therewith, are' given merelyas convenient examples, and. it will be recognized that the construction of the mechanism for controlling the rotation of the ductor roller and its movement betweenthe distributor rollers and'the ink fountain roller, as well as the timing of such'movement in" relation to the printing operation,'may be varied-without departing from the invention. Moreover, the controlof the rotation of the ductor'roller according to the invention is not restricted in its application to the particular construction of inking mechanism in connection with which it is herein illustrated and described,but may be applied conveniently to "other constructions of inking mechanism involving the use of a set of ink distributing rollers rotated continuously in one direction'.

* Having described my invention I declare that what I claim and desire to secure by Letters Patent isz- 1. In inking mechanism for printing machines,

the combination with an ink fountain roller, a

set of distributing rollers continuously rotated in one direction, a ductor roller and means adapted to move the ductor roller laterally alternately into contact with the ink fountain roller and one of the distributor rollers, of a driven -member rotating on an axis eccentric to the lateral path into contact with the ink fountain roller and one of the distributor rollers, of a driven member rotating on an axis eccentric to the lateral path 7 of the ductor roller, and located in such a position as to make driving contact with the ductor roller atan intermediate stage of its passage from the ink fountain roller to the distributor roller and means adapted to increase the speed of the driven member while the ductor roller is in driving contact therewith and before said ductor roller contacts with thedistributor roller.

3. In inking mechanism for printing machines, the combination with an ink fountain roller, a set of distributing rollers continuously rotated in one direction, a ductor roller and means adapted to'move the ductor roller laterally alternately into contact with the ink fount ain roller and one of the distributor rollers, of a driven member rotating on an axis eccentric to the lateral pathof the ductor roller, and locatedinsuch a position as to make driving contact with the ductor roller at an intermediate stage of its passage fromthe ink fountain roller to the distributor roller, meansadapted to increase the speed of the driven member while the ductor roller is in driving contact therewith and before said ductor roller contacts with the distributor roller and-means adapted to decrease the speedof said driven member-while'the ductor roller is'in, contacttherewith at; an intermediate stage of the passage of the ductor roller from the. distributor roller .to the ink fountain roller. 4. In a printing machine, the combination with a flat .bed. and a printing cylinder relativebeing rotated alternately in reverse directions and at varying speeds in unison with the reversal and varying speed of the reciprocating bed.

5. In a printing machine, the combination with a flat bed and aprinting cylinder relatively to which said bed is reciprocated, of. inking mechanism comprising-an ink fountain roller, a set of distributing rollers continuously rotated in one direction, a ductor roller, means adapted to move the ductor roller alternately into contact with the ink fountain roller and one'of the distributor rollers, a driven roller. located in 1 such a position as to make driving contactwith the, ductor roller during" intermediate stagesofthe movement of the latter towards and away from the distributor roller, and ajdriving con= nection between said driven roller and the re ciprocating bed whereby said driven roller is rotated alternately in reverse directions and at varying speeds in unison with the reversal and varying speed of the reciprocating bed.

6. In a printing machine, the combination with a fiat bed and a printing cylinder relatively to which said bed is reciprocated, of inking mechanism comprising an ink fountain roller, a set of distributing rollers continuously rotated in one direction, a ductor roller, means adapted to move the ductor roller, in timed relationship with the reciprocation of the bed, alternately into contact with the ink fountain roller and one of the distributor rollers, and a driven roller located in such a position as to make driving contact with the ductor roller during intermediate stages of the movement of the latter towards and away from the distributor roller, said driven roller being rotated alternately in reverse directions and at varying speed in unison with the reversal and varying speed of the reciprocating bed.

7. In a printing machine, the combination with a fiat bed and a printing cylinder relatively to which said bed is reciprocated, of inking mechanism comprising an ink fountain roller, a set of distributing rollers continuously rotated in one direction, a ductor roller movable alternately into contact with the ink fountain roller and one of the distributor rollers, a driven roller located in such a position as to make driving contact with the ductor roller at intermediate stages of the movements of the latter between the ink fountain roller and the distributor roller, a driving connection between said driven roller and the reciprocating bed adapted to drive that roller alternately in reverse directions and atvarying speeds in unison with the reversal and varying speed of the reciprocating bed, and means adapted to move the ductor roller in timed relationship with the reciprocations of the bed so as to bring said ductor roller into and out of contact with the driven roller during the movement of the ductor roller away from and towards the ink fountain roller at periods when the driven roller is at rest.

8. In a printing machine, the combination with a flat bed and a printing cylinder. relatively to which said bed is reciprocated, of inking mechanism comprising an ink fountain roller, a set of distributing rollers continuously rotated in one direction, a ductor roller movable alternately into contact with the ink fountain roller and one of the distributor rollers, a driven roller located in such a position as to make'drivbed so as to bring said ductor roller into and out of contact with the distributor roller while in contact with the driven roller and while ro-' tating at the same peripheral speed as the distributor roller.-

FRED SPENCE.

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