US2653537A

US2653537A - Form roller and cylinder tripping mechanism

Info

Publication number: US2653537A
Application number: US162227A
Authority: US
Inventors: Henri E Peyrebrune
Original assignee: Individual
Current assignee: Miehle Printing Press and Manufacturing Co
Priority date: 1950-05-16
Filing date: 1950-05-16
Publication date: 1953-09-29
Anticipated expiration: 1970-09-29

Description

P 1953' H. E. PEYREBRUNE 2,653,537

FORM ROLLER AND CYLINDER TRIPPING MECHANISM Filed May 16, 1950 4 Sheets-Sheet 1 55, N, ra9- 67 INVENTOR. 5 He/2n, LTPegrebm/ze S p 1953 H. E. PEYREBRUNE FORM ROLLER AND CYLINDER TRIPPING MECHANISM 4 Sheets-Sheet 2 Filed May 16, 1950 IN V EN TOR.

p 1953 H. E. PEYREBRUNE 2,653,537

FORM ROLLER AND CYLINDER TRIFPING MECHANISM Filed May 16, 1950 4 Sheets-Sheet 3 INVENTOR. Hera/"L E Pegrebru/w Y Sept. 29, 1953 H. E. PEYREBRU NE 2,653,537

FORM ROLLER AND CYLINDER TRIPPING MECHANISM Filed May 16, 1950 4 Sheets-Sheet 4 IN V EN TOR.

Hen/"L" E eyr'ebru/ze BY Patented Sept. 29, 1953 FORM. ROLLER. AND CYLINDER TRIPBING MECHANISM Henri E; Peyrebrune; River Forest, Ill., assignor to Miehle Printing Press &' Manufacturing; Company, Chicago, 11]., a corporation of Delaware- Application May 16, 1950, Serial No. 162,227

2 Claims. 1.

This invention relates to cylinder printing presses. Morev specifically it pertainsto im proved mechanism for tripping one of the associated cylinders of a printing couple away from the other and for subsequently tripping the form inking rollers from the printing form.

The improvements which are involved in the invention reduce to a very appreciable degree the heretofore ever present and di fficult problemof eliminating roller and gear streaks which simple and efficient means whereby during the tripping movement of the form cylinder away from its associated cylinder in unison with the form inking rollers, the predetermined contact relation, i. e; setting of these rollers with the form is maintained, and whereby the meshing relation of the main inking roller drive gear with the form cylinder drive gear remains undis-- turbed.

Another object of the invention resides in the provision of improved mechanismwhich includes a manually andautomatieally' operableeccentric member having its center of rotation so located with relation to the form cylinder that" the movementof the latter toward and away'from the impression cylinder occurs" in a directionangular to, i. e; intercepts the plane which passes through the axes of the form and impression cylinders;

A further object resides in the provision of novel tripping mechanism which includes means whereby theform rollers may be setmanually to remain in contact withtheform cylinder when it is in its printing position as well aswhen it is tripped, and whereby these rollers may be set to remain tripped off said cylinder in both its positions.

A still further" object is to provide improved means for automatically trip-ping the form rollers off the. form cylinder when it is inits tripped position.

Other objects and-1 improvements which my invention provides will be apparent from the fol-- The improvements also include 2 lowing description and appended claims: when read in conjunction with the accompanying drawings.

It will be understood, that the invention is susceptible to the embodiment of various constructional modifications, therefore the disclosure herein is merely by way of example, describing and illustrating a preferred arrangement of: the parts involved.

In the drawings:

Figure 1 is as side elevati'onalvlew showing the printing couple of a rotary printing press with the form cylinder, the impression cylinder, the associated form rollers and the tripping mechanism in position for printing;

Figure 2 is a view'similar to Figure 1,v but showing the" form cylinder inits tripped or non-printing position;

Figure 3 illustrates the form rollers in their tripped position, i.. e. spaced from the form cylinder';

Figure 4 shows a portion of the cylinder tripping mechanism and illustrates the manner in which thetripping. pawl is positively controlled while moving from one position to another with its actuating lever;

Figure 5 is across sectional view taken along an imaginary line through the inking roller unit for the purpose of showing the manner in which the form rollers and their" auxiliary frame members are adjustably supported. on. the press side. frames; and.

Figure 6 is'a cross-sectional view on an enlarged scale, taken on. line VI-VI. of Figure 1.

Referring now to Figure 1 of the drawings, the impression cylinder Ill, indicated in. broken. lines, isjournalled for rotation in the side. frame members lit and revolves in. counterclockwise direction... A form cylinder l2, which carries the printing plate or form, is arranged preferably above the impression cylinder and is. also supported: in. journals. provided: in the side frame members H at each side of the. press. While only one side of the press. is shown, it will be understood that many parts described and illustrated. herein as applied to that side, will be duplicated on the opposite side thereof.

For the purpose of tripping the form cylinder [2 with respect to. the impression cylinder l0 when the printing operation is interrupted, the form cylinder journals are supported. in. eccentric bores I3 formed. in housings l4 which are rotatably'mountedz in the. frame members H. As a result, when; the. housings I74 are rotated through a prescribed angle, the eccentricity of the bore I3 will cause the form cylinder |2 to move away from the impression cylinder l0.

In order to rotate the housings |4 through such a prescribed angle, they are provided with yokes it which are securely clamped thereon and are connected to a lever I! by means of the adjustable toggle link [8. Lever l! is pivotally mounted on a stud l9 and its free end 2| is connected by means of the rod 22 to lever 23 which is loosely mounted on shaft 24. The free end 29 of lever 23 carries a pawl 2'! which is pivotally connected thereto and is provided with

operative ends

28 and 29. This pawl is also provided with cam rollers 3| and 32 which are positioned near the

ends

28 and 29 respectively and are arranged to cooperate with a fixed cam 33 to control the position of pawl 21. Cam 33 is supported on shaft 24 and is secured in a predetermined position by means of a bolt 34.

A pawl actuating tripping lever 36 is also mounted to rock on the shaft 24 and carries at one end a cam follower 31 which traverses the counterclockwise rotating cam 38 which is mounted to rotate with the impression cylinder ill. The opposite end of lever 36 is provided with opposed jaw faces 39 and 4| which coact with the respective pawl ends 28 and 29 to effect the tripping and return movements of the form cylinder.

The lever 36 is also provided with an arm 42 which carries the cam roller 43 in a position wherein it will ride on cam 44 which is also mounted to rotate with the impression cylinder Hi. As a result, the jaw faces 39 and 4| will oscillate constantly about the axis of shaft 24 due to the action of the levers 35 and 42 as their associated

cam followers

31 and 43 ride on the

conjugate cams

38 and 44.

Pivotally connected to the lower end of pawl 27 is the rod 45, the free end of which is slidably inserted in the pivoted boss 41 and on which is mounted the compression spring 48. Spring 48 exerts a constant pressure against the pawl 2! urging it in a counterclockwise direction.

Under normal operating conditions however, the roller 32 on the pawl 21 is maintained in contact with the cam 33 against the pressure of spring 43 by the cam shoe 49. This shoe is rockably mounted on the stud shaft and is provided with an arcuate roller engaging face 52 which cooperates with the roller 32 to maintain th pawl 21 in the position shown in Figure l. The shoe 49 is urged against the roller 32 under the resilient pressure of the spring 53 which is mounted on rod 54. The latter passes through a bore provided in the pivoted boss 56 which is arranged on said shoe. This rod is connected to a lever 51 associated with the manual control lever 58. These

levers

51 and 58 are in turn mounted to rotate on stud 59. By moving the lever 58 in the clockwise direction when the press is in operation the spring 53 will become compressed so that the face 52 of the cam shoe 49 will urge the roller 32 into contact with the fixed cam 33 against the pressure of spring 48 and thereby the end 29 of pawl 21 will assume the position as shown in Figure 1.

The position of shoe 49 is also controlled by automatic means, not shown, but which are connected to the rod 6| The automatic means may be of any conventional type such as, for example, the mechanism disclosed in the Jacobson Patent #2,100,852 and since it forms no part of this invention it has not been illustrated.

Under normal operating conditions the tripping mechanism will remain in the positions shown in Figure 1 and the jaws 39 and 4| will oscillate about the shaft 24 without affecting the position of the pawl 21. However, when the press is tripped, either manually or automatically for some reason, the following action takes place:

The lever 58 is moved counterclockwise thereby releasing the pressure of spring 53 on the boss 56 as the collar 62 engages said boss to depress the shoe 49, as shown in Figure 2. The pressure of spring 48 then urges the pawl 21 in counterclockwise direction until roller 3| engages the high part of cam 33 so that both ends 28 and 29 of the pawl are engaged by their respective coacting jaws 39 and 4| of the trip lever 36 and as shown in Figure 4.

With the pawl 27 so positioned it will move with the trip lever 36 as it rocks clockwise about the shaft 24 by virtue of the

cams

38 and 44 acting against the

followers

31 and 43 and both ends of the pawl will remain engaged with the jaw faces 39 and 4| until lever l6 reaches the end of its stroke. Consequently, the movement of the pawl 21 is under positive control of the lever 36 during the tripping and return functions of the mechanism, thereby avoiding any possible overthrow of the associated levers. As a result, the action is smooth and free of shocks and strains which are otherwise present when rigid stops are used to control such mechanism.

As the lever 39 reaches the end of its clockwise stroke, roller 3| drops to the low part of cam 33, due to the pressure of spring 48, thereby causing pawl 27 to pivot counterclockwise until its end 29 is completely free of the jaw face 4|, as shown in Figure 2. At this point, lever 33 reverses its direction but pawl 2'! will remain motionless until lever 58 is reset, and the end 29 of pawl 21 is again urged into contact with the jaw face 4|.

As pawl 21 and therewith lever 28 move clockwise, a corresponding movement is imparted to the arm 23 and thereby to lever 2| and lever through the connecting rod 22. This movement is transmitted through the toggle link It to the yoke l6 which rotates the housing I4 through a predetermined angular displacement as shown in Figure 2. Due to the eccentricity of the bore l3 in the housing I4 and in which the form cylinder 2 is journalled, this rotation of the housing I4 causes the form cylinder l2 to move away from the impression cylinder It at an angle with respect to a plane which passes through the axes of the two cylinders.

To insure uniform distribution of the ink on the form when the form cylinder is tripped and to thereby avoid streaks on the finished prints, the form inking roller units are raised in unison with the form cylinder in order to maintain the contact relation of the form rollers constant with respect to the form cylinder. The inking roller unit comprises

form rollers

63, 64, 66 and 61, which, along with their associated distributor rollers 68 and 69, ink distributing drum 10 and rider rollers II and 12, are supported in

auxiliary frames

13 and 14 respectively which are movably arranged on the frame members The gibs l8 and TI, bars 18 and 19 and the guide rails 8| and 82 all cooperate to maintain the

frame members

13 and 14 in position on the frame members I and are arranged to permit raising and lowering of the

frames

13 and 14 as they move up and down with the form cylinder.

In the interest of simplicity, the driving gears for the inking rollers have not been shown in the drawings, however it will be readily understood that the inking rollers are driven in a conventional manner from the form cylinder gear and that the axis of the main inking roller drive gear is located in line with a plane drawn thru the axis of the housing I4 and the axis of the eccentric bore I3 so that raising of the form cylinder gear with the form cylinder will not disturb the meshingrel-ation of the two gears.

As shown in Figures 1, 2, 3 and 5 the auxiliary frames I3 and I4 are provided with

rollers

83, 84, 86 and 81 which are arranged to ride on the cam 88 forming an integral part of the yoke I6. Consequently, when the yoke I6 is moved in order to separate the form cylinder I2 from the impression cylinder I0, the cam effects a relative raising of the frames I3 and I4 and therewith the

form rollers

63, 64, 66 and 61 for the purpose of maintaining the contact relation of said rollers with said form undisturbed.

As is more clearly illustrated in Figure 5, the

cam rollers

83, 84, 86 and 81 are mounted on the frame members I3 and I4 with eccentric studs 89 to provide adjustment whereby the cam rollers can be positioned with relation to the cam 88 after the form rollers are set with relation to the form cylinder. This adjustment is necessary to compensate for variations in roller diameters, wear etc.

During the raising movement of the frame members 13 and I4, see Figures 1 and 2, they are guided by rails BI and 82 respectively which rails are fixed to the main frame members I I and fit into grooves provided therefor in the auxiliary frame members I3 and 14. The rails 8| and 82 are so designed and located that said movement of the frame members I3 and I4 will not affect the meshing relation of the associated ink roller driving gears and the angular displacement of the form cylinder, due to the eccentricity of the bore I3, will be compensated for.

To provide for adjustment of the contact relation of the individual form rollers with the form cylinder, they are mounted in sockets 9I, 92, 93 and 94 formed on the

arms

96, 91, 98 and 99 which are adjustably supported on their respective frames I3 and 14. At their bases the arms are held slidably in position, along with the frame members I3 and 14, by means of the bars I8 and i9 which are fixed in position on the frame iI. See Figures 1 and 5. The upper ends of said arms embrace the eccentrics IOI, I02, M3 and I04 which are formed on the ends of shafts such as I66, which project through openings in frame member II and are provided with manually controlled handles I01 whereby the position of the eccentrics can be adjusted to vary the contact relation of the form rollers on the form cylinder. These eccentrics IOI, I02, I03 and I04 are also actuated by automatic means through levers such as I08 to effect tripping of the form rollers off the form cylinder. For a detailed explanation of the form roller setting and tripping mechanism I refer to my copending application Serial #749,803 which is specifically directed to those features.

The position of the form rollers with respect to their associated distributor rollers 68 and 69 is also adjustably maintained. Links I 09, III, H2 and H3 are pivotally connected to their

respective arms

96, 91, 98 and 99 with their free ends fitted over the eccentrics H4, H6, H1 and 6 H8. These eccentrics are also formed on the ends of shafts such as H9, in Figure 5, which project through openings in the frame members II and are provided with manual controls I2I for adjustment purposes. It will be noted that the openings in the frame members II, for the shafts I06 and H9, are sufiiciently large to permit free up and down movement of said shafts as they move with the auxiliary frames I3 and I4 when the form cylinder is raised and lowered.

After the form cylinder and therewith the form inking units are raised in unison off the impression cylinder, the

form rollers

63, 64, 66 and B1 are then tripped oil. the form cylinder I2 in sequence and in pairs as shown in Figure 3. This tripping action can be accomplished either manually or automatically and the mechanism involved is illustrated and explained in my said copending application. Therefore, I do not deem it necessary to disclose or explain this mechanism in detail in this application.

However, the form roller tripping mechanism referred to is actuated through the lever I22 which is fixed to shaft I23 and can be set for either manual or automatic operation, See Figures 1, 2 and 6. Operating in conjunction with lever I22 is the lever I24 which is loosely mounted on shaft I23 and is provided with an arm I26 which is connected to lever I! by means of the rod I21. As a result each time lever I1 is actuated by the form cylinder tripping mechanism a relative rocking motion is transmitted to lever I24.

The free end of lever I24 is provided with a recess I28 to receive the pin I29 slidably mounted in lever I22 and which is urged into engagement with lever I24 by the spring I3I acting against flange I32 on the plunger I33. The opposite end of plunger I33 is provided with a knob I34 by which the position of the pin I 29 can be changed. As shown in Figure 6 the lever I22 is set for automatic operation with the pin I29 set in the lever I24. Consequently, each time the lever I24 is rocked clockwise, due to its connection with lever II, the lever I22 will move therewith, turning the shaft I23 and thereby setting up the associated form roller tripping mechanism to move the form rollers off the form cylinder.

To set the lever I22 for manual operation, knob I34 is pulled out until pin I36 is free of the slot I 31 and pin I29 is withdrawn from lever I24. Then said knob is rotated through until pin I36 is again in line with slot I31 and pin I29 coincides with the flange I38 on the frame II. With the pin I29 in this position, movement of lever I24 will not affect lever I 22 or shaft I23.

When set for manual operation, lever I22 is moved until pin I29 enters either groove I39 or groove I4I, which are marked On and Off respectively. If pin I29 is set in the on position the form rollers will remain in contact with the form cylinder when it is in its printing position as well as when it is tripped, and if set in the off position said rollers will remain tripped off the form cylinder in both said positions.

While I have herein disclosed a preferred embodiment of my invention, I do not Wish to be limited to specific details because modification in the design and arrangement of parts may be made without departing from the spirit of my invention and the scope of the appended claims.

What I claim is:

1. In a printing press having coacting form and impression cylinders, eccentric journalling means for tripping said form cylinder bodily in a curvilinear path with respect to the impression cylinder, and a main ink drum having rotation about a fixed axis, the combination of, an ink distributing unit for transferring ink from the main ink drum to the printing surface of the form cylinder, said unit comprising a rider roller having contact relation with the main ink drum to receive ink therefrom, form rollers having contact relation with the printing surface of the form cylinder to deposit a film of ink thereon, and a distributor roller arranged to transfer ink from said rider roller to said form rollers, auxiliary frame members for supporting said rider, distributor and form rollers for bodily movement as a unit, means interconnecting said eccentric journalling means with said frame members whereby relative motion in a predetermined path is imparted to said frame members and said rollers as a unit in unison with the form cylinder when the latter is tripped on and off impression, and stationary guide means having sliding engagement with the auxiliary frame members for controlling the angular relation between said frame members and the printing surface of said form cylinder to thereby maintain constant the contact relation of the rider and form rollers with the main ink drum and the form cylinder respectively for all positions of said cylinder.

2. In a rotary printing press having an impression cylinder, a printing form cylinder, means for tripping said form cylinder With respect to said impression cylinder, and an inking roller assembly comprising a plurality of form rollers, a distributor roller, and a rider roller for apply- 8 ing a film of ink onto the printing surface of said form cylinder, the combination of movable frame members for supporting the rollers of said assembly for bodily movement as a unit, means including a cam adapted to move with said tripping means and coacting cam rollers mounted on said frame member for effecting relative movement of said inking roller assembly in unison with said form cylinder when the latter is tripped, stationary guide means having sliding engagement with said frame members for guiding said frame members and thereby said inking rollers in a predetermined path during said movement to thereby maintain constant the rolling contact relation between the form rollers and the form cylinder, and additional means carried by said frame members and including rotatable eccentric members having a connection with said tripping means and with said form rollers for tripping the form rollers of said assembly off said form cylinder after the latter is tripped.

HENRI E. PEYREBRUNE.

References Cited in the file of this patent