US2195829A - Ductor roller control for printing presses - Google Patents

Description

April 1940- c. E. SHREFFLER 2,195,829

.DUCTOR ROLLER CONTROL FOR PRINTING PRESSES Filed Sept. 23, 1938 25 16 I I .9 ,7 o B N Fl G0 3 //VVE/V70/ (Z AEEHCE E. SHEEFFLEE 4 7'7'OENE Y 15- when' the ductor' rollerieaves the fountain roller,

PatentedApr.2, 1940 3 25195329 ifiyvNIT STAT i 4 v Clarence shrefllerflieloitfWis: I 7 Application September 23, 1938, Serial No. 231,309 in t t 2 Claim- R Q1+31 511 --The present invention comprises means for mounted on the frame of the printing press as controlling the turning movement of ductor rollat. I v i -15 j ers and has for its object permitting a free movev if Member A comprises 'aohousing i In which is ment'of this roller while in contact with the ink Y suitably secured to the ductor roller bearings 12 plate or fountain roller by braking the roller and operated in a mannerwhich will herein- 5 directly after it leavesthese parts and releasing after appear. Y it-directly before it contacts these parts. The ink plate of thepress is designated by An objectof the present invention is to provide referencenumeral I5 This plate is adapted to a more even distribution of the'ink to and on the be moved or oscillated and conveys the'ink from a v ink plate. Ductor rollers are in motion while in the ductor roller 9 to the otherrollers'which 10;

contact with the plate.- This motion is harmful finally convey the ink to the type through a num-I ifitcontinue's until it contacts the fountain roller ber' of rollers (not shown) as is -custor'nary I in because it "may then be turning at a different pressesfof the-class. 'Fountainroller' I6 is rotatperipheral speed than the fountain roller and ably-mounted in bearing blocks ii. A member I8 is positioned'as illustrated forming a well for 15,: it will 'be i'n' motion which, if continued until it a suitable supply of ink I9.- Roller I6 is provided contacts the plate,- will be harmful for obvious with ratchet means (not shown) for turning this reasonsj' I roller at'i'nte'rvals in the'p'roper direction. "flihe*principlef objec'tbf the present invention Means (not shown) are also provided for adis 'to" ho1dthe ductor roller from turning while justing the duration of the turning movement of g passing betwee n the'fountain roller and the ink the fountain roller.' Thus the'desired quantity of plate and to-freethe ductor roller just before it ink may be supplied to-the ductor rollerwhileit contacts these parts at'whichtime thesecontacts is inc'ontaet with the fo-untain roller. While the will 'cau'se' the ductorroller to be driven by fricink: plate- -i s in its forward po'sition, arm i3 is 5 tio'n at' considerable speed therefore the present caused "to swing on its/axis "so as to bring' the 5 invention providesmeansfor braking the ductor ductor roller in the positionshown in Figure 2. rolier irnmediatel'ya'fter it leaves its contacts and Thus the desired quantity of ink will be conthe'n permit' ittoturn freely while in contact. ve'yed from roler lfi to roller 9 and then to the "*An-ebjec pr the present invention isto pro- I inkplate as theplate moves back under the vide simple adjusting means whereby the braking ductor roller' as illustrated in Figure 2 I l 30 and releasing p'oints may be adjusted to suit the i The; mechanism which oscillates arms I3- is particular press being served; adapted to move these arms to the position shown "Afurthe'r object of the present invention is to in 'Figure 2 While plate I5 is in; its forward posiprovide simple means for adjusting the braking tion a'fterwhich the plate moves back under the pressure on the'rol'l and for taking up the wear ductor roller S as illustrated in this figure, re- 35 on thebrakebands; ceiving-a'fresh supplypf from theductor 116 these and other useful ends, my invention roller.

consists ofparts and combinations of parts or Rollers i9, 20 and) are adapted to contact their equivalents, and mode of operation, as here the rear end'of the plate 'or the portion contacted inafterset' forth and claimed" and shown in the by'the ductor roller andas it movesforward the 40' accompanying drawing in which: v ink is picked up by these rollers which will, in Fig. 1 is a partially sect'oned front view of turn, evenly spread the ink'on the forward surmy improved-device. face of the plate duringthe time the plate is Fig. 2 is a fractional view of a printing press on in its rearward position (see Figure 2).

which my device is shown installed. It will be seen that as the plate moves rear- 45 Fig. 3 is a fractional view of thebrake actuatwardly under ductor rol1er9, the ink will be ing means, the housing and a fraction of the trip spread over the plate and the roller will be lever being sectioned.v caused by frictional contact to travel at con- As thus illustrated, myimproved braking desiderable speed and when the plate moves forvice is designated in its entirety by reference ward out of contact with the ductor roller, this 5 character A'and the printing press is designated roller is left turning at considerable speed. The in its entirety by reference character 13. Member braking device acts to stop this movement di- B comprises the usual ductorroller 9 which is rectly after the ductor roller starts to move torotatably mounted on the free ends of arms l3 by ward the fountain roller, the ductor roller is thus I i means of bearings i2, the arms being pivotally held from rotation until it is near the fountain 55 roller at which time the braking mechanism will be caused to release the roller so it is free to turn before it contacts the fountain roller. The same braking operation takes place when the ductor roller leaves the fountain roller and before it contacts the ink plate.

The mechanism I have provided for braking and releasing the ductor roller at the proper time is as follows: Housing I0 is secured to bearing I2 preferably by means of bolts which pass through lugs ll-ll and 25-25.

I provide braking sectors 26 and 21 each being pivoted preferably to a common pin 28, the sectors being provided with suitable brake linings 29-29. 30-30 each having mounted thereon at their upper ends plates 3I-3I. These plates are held to the arms by means of plate pins 32 which extend loosely through apertures in the arms. In order to make a suitable preliminary adjust ment, I provide a number of thin washers 33-33. These washers may be removed from time to time in order to suitably adjust the mechanism as the brake linings 29 wear. Thus when the brake linings are new, quite a number of these washers will be in place under the plates in order to provide for considerable wear of the brake lining.

Member ID is open on one side, the opening being covered by cover plate 35. Thus, by removing this cover plate, the brakes may be adjusted.

I provide bosses 36-36 which are provided with chambers for the reception of springs 38, the outer ends of the chambers being threaded for the reception of plugs 31. Springs 38 are positioned in the chambers as illustrated, the inner end being held into position by pins 354.

It will be seen that the tension on brake linings 29 may be easily adjusted by screwing plugs 31 in or out.

I provide a brake operating plate 40 having a shaft 4| which is journaled in and protrudes through boss 42. I secure a lever 43 to shaft H having preferably at its outer end an opening through which a brake releasing rod 44 is slidably mounted.

Rod 44 is provided with spaced adjustable stops 45-45 and is rotatably secured to bearing block I! as at 46. Thus it will be seen that when arms I 3 approach the position shown in Figure 2, one. of the stops'will act to turn plate 40 and hold the brake linings out of contact with the ductor roller shaft. This operation is repeated when the ductor roller approaches the fountain roller.

Clearly by shifting stops 45, the brake may be caused to operate at various distances from the fountain roller or the ink plate.

Thus it will be seen that I have provided eficient meansfor controlling the ductor roller and Sectors 26 and 21 are provided with arms more satisfactorily supply ink to the ink plate.

Clearly many minor detail changes may be made without departing from the spirit and scope of the present invention as recited in the appended claims.

Having thus shown and described my invention, I claim:

1. A device of the class described, comprising two spaced arms being hingedly mounted at one end and having a shaft rotatably mounted in the other ends thereof, said arms adapted'to'be oscillated on their hinges between predetermined points, a braking device mounted on the free end of one of said arms, said braking device comprising two sectors which are hingedly mounted at adjacent ends thereof, each sector having braking bands adapted to engage said shaft on opposite sides thereof, spaced arms on the free ends of said sectors, yielding means adapted to cause said braking bands to snugly L engage said shaft, brake releasing means positioned between the free ends of said last arms, and being secured to a shaft which is rotatably mounted and having a lever whereby when its free end is moved in either direction, said brake bands will be released, and adjustably mounted stops positioned in the path of the free end of said lever and being adapted to contact the lever and cause said brake bands to be disengaged before said arms reach the end of their travel in either direction.

2 A device of the class described, comprising two spaced arms being hingedly mounted at one end and having a shaft rotatably mounted in the other ends thereof, said arms adapted to be oscillated on their hinges between predetermined points, a braking device mounted on the free end of one of said arms, said braking device comprising a housing having therein two sectors which are hingedly mounted at adjacent ends, each sector having braking bands adapted to en gage said shaft on opposite sides thereof, spaced arms on the free ends of said sectors, two springs each adapted to engage one of said last arms and cause said brake bands to yieldingly engage said shaft, spaced adjusting means on the inner side of the free ends of said arms, brake releasing means positioned between said adjusting means and being secured to a shaft which is rotatably mounted in said housing, one end protruding through the housing, a lever secured to said protruding end and being adapted to disengage said brake bands when the free end thereof is moved in either direction, and adjustably mounted stops positioned in the path of the free end of said lever and being adapted to contact the lever and cause said brake bands to be disengaged before said arms reach the end of their travel in either direction. I

CLARENCE E. SI-IREFFLER.

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