US2233076A

US2233076A - Rotary inking mechanism

Info

Publication number: US2233076A
Application number: US253244A
Authority: US
Inventors: Hobart N Durham
Original assignee: GOSS PRINTING PRESS CO Ltd
Current assignee: GOSS PRINTING PRESS Co; GOSS PRINTING PRESS CO Ltd
Priority date: 1939-01-28
Filing date: 1939-01-28
Publication date: 1941-02-25
Anticipated expiration: 1958-02-25

Description

Feb. 25, 1941. N DURHAM 2,233,076

ROTARY INKING MEGHANISM Filed Jan. 28, 1939 2 sheets-#sheet 1 ENTOR/ WLM Feb. 25, 1941. H, .g DURHAM 2,233,076

ROTARY INKING ECRAN-ISM FiledJan. 28, 1959 2 Sheets-Sheet 2 www'.

WUBWENTOR TToRNEYs vis Patented Feb. 25, 1941 PATENT oFFICE `2,233,676 jm ROTARY INKING MEcnaNIsrvr Hobart N. Durham, Manhasset, N. Y., assignor to The Goss Printing Press Company,v Chicago, Ill., a `corporation of Illinois.V

Application January 2s, 1939, seriaiNo. 253,244

6 Claims.

The invention relates tonew and useful improvements in inkingmechanisms for fast rotary printing presses, andmore particularlyito such improvements in the actuating means for the vibrator drums of such rotary inking systems.

Objects and advantages of the inventionwill be set forth in part hereinafter and in part will be obvious herefrom, ormay be learned by practice with the invention, the same being realized and attained by means of the linstrumentalities and combinations pointed out in the appended claims. l

The invention consists inthe novel parts, constructions, arrangements; combinations and improvements herein shown and described.

Of the drawings: l

Fig. 1 is a verticalsection through apart of a rotary inking mechanism embodying the invention; I

Fig. 2 is an enlarged detail section on line 2-2 of Fig; 1;

Fig. 3 is a detail section on line `3 3 of Fig. 1; and

Fig. 4 is an enlarged detail of the rotary fluid pressure controlling valve.

Objects of the invention are to provide novel, simple, strong `and efficient `vibrating vmeans for certain of the ink distributing and transferring rollers or drums of a rotary printing press inking system; to avoid thecomparatively complicated and power consuming mechanical vibrating mechanisms heretofore generally in use and to substitute novel, simple and direct-acting fluid pres-sure actuating means;` to. provide reversible fluid pressure actuating means to vibrate an ink drum and means actuated by the rotating and vibrating shaft for reversing" said actuating means;` to provide fluid pressure actuation for the vibrator drums or rolls which is operable from or in conjunction with the pressure lubrication sys-tem `in use on modern rapid rotary presses; to provide novel and efficient particular mechanisms for applying fluid pressure actuation to the vibrator drives of rotary presses. With these and other objects in View, the rotary and vibratable drums or rollers of the inking system have at one end an elongated shaft which extends beyond its bearing in the press frame, a cylinder is fixed to the press frame, the shaft yextension passing concentrically `therethrough and projecting beyond the outer end of the cylinder. A piston within the cylinder'is mounted on the shaft,` the `piston being xed against longitudinal movement relatively to the shaft, but at the same time free rotation of the'shaft within the (Cl. lill-35.0)

piston is permitted, whereby the piston, under the drive `of the pressure fluid, moves the rotating shaft to and fro longitudinally so as to impart the desired combined rotational and vibratory, or reciprooatory movement to the inking drum or like member. Valve means are provided for causing a difference in fluid pressure to beV alternately created on the opposite sides to the piston, the valve means being reversed at the end of the stroke directly from the reciprocating shaft. It will be understood that the foregoing general description and the following detail description as well are exemplary and explanatory of the invention, but are not restrictive thereof.

In the embodiment of the invention herewith exemplarily illustrated, it is shown applied to a known form of rotary printing press inking mechanism, which comprises a plurality of rotary ink distributing drums and ink transfer rollers located between the ink fountain and the form inking roller, certain of these rot-ary members, usually the ink drums, being axially reciprocated or vibrated in addition to their rotary movement. These members are usually rotated by gearing driven from the press drive. As here shown, axially vibratable ink drums l and 2 have their'respective

shafts

3 and 4 journalled in the press frame 5. A fountain roller 'l and a ductor roller 6 are also fragmentarily shown. As here embodied the

shaft

3 or 4 of the axially vibratable drum is journalled in a bushing II mounted in the side frame 5 of the press. (Only one shaft and actuating mechanism will be described.) The bushing at its outer end terminates in an integral, flat circular plate I2, which constitutes part of the fluid pressure actuated vibrating means as later described. The shaft 3 extends for some distance beyond the side frame 5 of the press. Mounted on the press frame concentric-ally with the shaft 3 is a cylinder I5, the inner end of which is formed by the plate I2 previously referred to. The end I6 of the cylindrical wall sets into and -makes a seal joint with an annular shoulder in the plate I2, and terminates in a ange Il which is fastened to the pres-s frame by screw bolts `I8. The outer head I9 of the cylinder is centrally apertured, the shaft 3 projecting through' and beyond it, the valve actuating means being connected to the exterior end of `the shaft.

Surrounding the shaft 3 on the exterior of the cylinder head I9 is a packing gland 23,`and a similar gland 24 surrounds the shaft 3 at the inner end of the bushing II. The sleeve II receives lubricating oil from the cylinder and this drains out into the general lubricating system through drainage passage 25. Within this cylinder I5 is a piston 28, mounted in xed axial relation on the shaft 3 while permitting free rotation of the shaft, whereby the pressure alternately applied to the opposite sides of the piston will act to reciprocate or vibrate the rotating shaft. As embodied, within the cylinder, two collars 29 and 30 are mounted in spaced-apart relation on the shaft 3, and are held in fixed position by clamping screws 3| and 32. On the adjacent sides of the collars 29 and 30 are antifriction bearings 33 and 34, one of the raceways of each bearing being set into the piston 28, the shaft thereby being free to rotate Within the piston, but the piston carrying the shaft and drum with it in its reciprocatory movement under the action of the pressure fluid.

So far as concerns certain features of the in.

vention, any form of valve mechanism forreversing the action of the pressure fluidin the cylinder may be employed. As embodied, a rotary valve 4| is mounted in a block 40 which is bolted to the cylinder block. Valve 4I is interposed between the pipe 42, which supplies the pressure. fluid, and two conduits 43 and 44, conduit 43 communicating with the outer end'of the cylinder I5, and conduit 44 communicating with the inner end of the cylinder, the partial rotation ofthe Valve supplying the pressure fluid alternately at either side of the piston I5. Valve 4I is held longitudinally in place in the block 4l) by a collar 39 at one end and a flange 6I at the other end. Rotary valve 4| has an internal longitudinal aperture 38, closed at one end by a screw plug 3l. The valveis supplied with a plurality of ports 45 in line with the pipe 42, located to receive the pressure fluid at all angular positions of the valve 4|. The valve has also a plurality of ports 48 positioned to connect the interior aperture 38 of the valve alternately with the conduits 43 and 44, to supply the pressure fluid alternately to the two ends of the cylinder as described. The means for allowing fluid to flow from the two ends of the cylinder I5 comprise

conduits

53 and 54 lying parallel to the intake conduits 43 and 44, the

conduits

53 and 54 having

exhaust ports

55 and 56 for exhausting the used pressure fluid from the cylinder. In the outer surface of the valve 4I are two elongated ports 5'! and 58, port 5l serving to connect the conduit 43 with the conduit 53 of their exhaust stroke and port 58 serving to connect the

conduits

44 and 54 on their exhaust stroke.

The embodied means for imparting reciprocatory partial rotation to valve 4| is connected to the ink drum shaft, and is shown in Figs. 1 and 2. At one end of valve 4| is an annular flange 6I which is external to the valve housing. The flange has an arcuate cut-out portion 62 in which is a pin 83, fixed to and projecting from the valve housing, and limits the amplitude of movement of valve 4|. Fixed also to the flange 6I and projecting outwardly therefrom is a pin 66, which is within an opening 6l in a lever 68, which lever is pivoted on a pin 69, mounted in the valve housing. A spiral tension spring 68' is connected to a vpin lil, xed on said lever 68, and to a pin 10', fixed in the valve housing, the spring tending to hold the lever 68 at either side of the center of amplitude. On theexterior end of the shaft 3 is a pair of collars 'I3 and 'I4'and a pin I5`xed in ithe'l'ever 88 projects into' the space between the collars. Just as the shaft approaches the end of its travel in one direction, it moves the lever B8, which after passing over the center is snapped by the spring 68', and due to the play in opening 61 moves to the opposite position, and thereby imparts to Valve 4| the rotation required to reverse the pressure in the cylinder I5.

In presses employing pressure lubrication, the

pipe 42 may be connected to the oil pressure system, and the exhaust ports may return the oil to that system or be led to a bearing to be' lubricated. A housing I9 enclosing the entire mechanism is provided.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom distributing rand transferring members, one ory more of said members being also axially vibratable, a rotary and vibratable inking member having a shaft journalled in the press frame, a pis- .ton held against axial movement on said shaft, a

cylinder in which the piston reciprocates, reversible valve means for alternately creating a difference in fluid pressure on the opposite sides of said piston and means actuated by said axially moving shaft for reversing said valve means.

2. In a rotary printing press inking mechanism comprising a plurality of cooperating rotary ink distributing and transferring members, one or more of said members being also axially vibratable, a rotary and vibratable inking member having a shaft journalled in the pressframe, antifriction bearings mounted in xed position onv said shaft, a piston mounted in said bearings to move axially with the shaft, there being free relative rotary movement between the piston and shaft, a cylinder in which the piston reciprocates, reversible valve means for alternately creating a difference in fluid pressure on the opposite sides of said piston and means actuated by said axially moving shaft for reversing said valve means.

3. In a rotary printing press inking mechanism comprising a plurality of cooperating rotary ink distributing and transferring members, one or more of said members being also axially vibratable, a rotary and vibratable inking member having a shaft journalled in the press frame, spaced-apart collars fixed to said shaft, thrust bearings between said collars and a piston between said bearings, a cylinder in which the piscomprising a plurality of cooperating rotary ink distributing and transferring members, one or more of said members being also axially vibratable, a rotary and vibratable inking member having a shaft journalled in and projecting out from the press frame, a cylinder fixed on said frame concentrically with said shaft, a piston in the cylinder mounted in fixed axial relation on the shaft, the piston and shaft being in free rotative relation, reversible valve means for alternately supplying fluid under pressure to and allowing it to flow from the ends of said cylinder and means,

actuated by said axially moving shaft for reversing said valve means.

5. In a rotary printing press inking mechanism comprising a plurality of cooperating rotary ink distributing and transferring members, one or more of said members being also axially vibratable, a rotary and vibratable inking member having a shaft journalled in and projecting out from the press frame, a cylinder fixed on the exterior side of the press frame concentrically with said shaft, the shaft extending through and projecting beyond the cylinder, a piston in the cylinder mounted in xed axial relation on the shaft, reversiblevalve means foralternatelysupplying uid under pressure to and allowing it to flow from the ends of said cylinder, and means connected to said shaft internally to said cylinder and actuated by the axial movement of the shaft for reversing said valve means.

6. In a rotary printing press inking mechanism comprising a plurality of cooperating rotary ink distributing and transferring members, one or more of said members being also axially Vibratable, a rotary and Vibratable inking member having a shaft journalled in the press frame, reversible fluid pressure actuated means for vibrating said shaft and member, and means actuated by the rotating and Vibrating shaft for reversing said uid pressure actuated means.

HOBART N. DURHAM.