US1868097A

US1868097A - Bearing arrangement for multicolor printing machines

Info

Publication number: US1868097A
Application number: US364267A
Authority: US
Inventors: Egli Arnold
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-05-19
Filing date: 1929-05-18
Publication date: 1932-07-19
Anticipated expiration: 1949-07-19

Description

July 19, V,nu EGLI BEARING ARRANGEMENT FOR MULTICOLOR PRINTING MACHINES Filed May 18, 1929 yec Patented` July 19, 1932 UNITED STATES PATENT OFFICE ARNOLD EGLI, OF HAMBURG, GERMANY Application filed May 18, 1929, Serial No. 364,267, and in Germany May 19, 1928.

In multi-color sheet intaglio printing machines it is necessary that 'the printing cylinders, of which preferably several are arranged on the periphery of a common impression cylinder, be set accurately towards each other not only'in a radial'direction but also in an axial sense and in such amanner, that when the setting is finished the printing cylinder can be moved close to the imm pression cylinder and away from it without impairing the setting. Said printing cylinder must be supported thereby so it can absorb any radial pressure.

In accordance with the present invention,

l each printing cylinder is supported by three bearings, two of which are adapted to absorb only radial pressures, whereas they permit axial shifting of the printing cylinder. These bearings are arranged in the engine frame by which the impression cylinder also is supported. I provide the third bearing in a third partition in the engine structure, such bearl beingarranged to .secure the printing cyllnder against axial shifting dur- 5 ing the operation, but permitting an advanced setting in this direction, said bear ing being constructed in such away that it can absorb only radial forces in a perpendicularV direction.

One embodiment of said invention is represented in the accompanying drawings, wherein for the sake of a better understanding onl those engine parts have been shown whlch are directly affected by the present f invention, while the well known parts of the multi color sheet intaglio printing machine necessary for its operation as for instance the drivin gear ofv thev printing cylinder and the li e havenot been illustrated. In osaid drawings, L

Fig. 1 is a longitudinal section, partly in ievation, of myimproved printing cylinder Fig. 2 is a side elevation of a bearing bracket on line II-II of Fig. 1. p

Fig. 3 illustrates in side view a detail of the drivinggear of the printing cylinder.

Fig. 4 is a section on line IV-IV of Fig. 1.

Fig. 5 shows a section through the impres- 'sion cylinder and the printing cylinders of a three color sheet intaglio printing machine.

It has 'been found suitable to use in multicolor sheet intaglio printing machines tubular printing cylinders removably arranged on the supporting elements so that they can be readily exchanged. AAt tubular printing cylinder 10 of this type, ribbed on the inside, is shown in the embodiment of the invention illustrated. The cylinder is mounted between the tightening devices 5, 6 and the 00 setting devices 7, 8 and 9 on a conical supporting member 2 rigidly attached to the shaft 1. The shaft 1 of the printing cylinder is supported in three bearings, two being located in the two main Walls a, b of the engine frame, and the third in a special partition c of the engine frame arranged outside the two walls a, b. The bearings in the engine walls a, Z) are arranged as shown in side View in Fig. 2 and comprise bearing 70

brackets

11, 11, mounted to swing around the bolts 12, 12', said brackets being provided with conical bores for receiving conical bearing

cases

13, 13 and

cross bearings

14, 14. Thelatter Aare mounted on sliding bearing

sleeves

15, 15 which cannot tu-rn around the shaft ends butmay be shifted longitudinally on the shaft. It will be seen that these bearings arranged in the walls a and b can absorb radial pressures when the

bearing brackets

11, 11 have` been placed into the pressure position by means of the bell crank lever 7c (Fig. 2) and when said printing' cylinder is operating together with the impression cylinder.

Thev driving of the printing cylinder is effected by a driving wheel, not shown in; the drawings, engaging the toothed wheel 16, which turns freely Von shaft -1. The toothed wheel is provided on the periphery 90 of the rim with a groove 16 engaging the guide finger 17 attached to the bearing case; said finger preventing an axial shifting of the wheel against the engine frame b. The shaft is turned by the toothed Wheel with the aid of a disk 18 (Fig. 3) which can be fixedly clamped upon the shaft end, la slot 19 in said disk engaging a catch bolt 20 of 'the wheel 16, the connection between the slot 100 19 and the bolt 20 being effected by an adjustable eccentricsleeve 21 and a sliding hub 22. It is possible by these means to set the shaft 1 and the printing cylinder 10 in radial direction with regard to the peripheral direction," the rough setting being effected by turning and tightening the clamping disk 18, whereas the fine setting is done by a turn of the eccentric sleeve in the hub 22. The axial shifting of the shaft in the limits which are to be considered here is not obstructed by this connection as the hub 22 may be shifted axially in the slot 19.

Thesetting in an axial sense is done by means of a hand wheel 23, which turns on the outer shaft end, but isarranged so that it cannot be shifted axially; the hub fof said wheel being provided with threads 23 on v the external periphery engaging with the internal threads in the sleeve 25. This sleeve 25 with its

iange rings

25 and 25" is placed against the artition c of the engine frame by a tight t thus preventing any shifting in axial direction. While said sleeve generally is not guided axially in the wall its upper side is provided with a fiattened portion 28,

which may be placed against a correspondd essary for this urpose to ltake out the bearing surface in the partition c. A pin 30 arranged inthe wall 'c engages with a slot 29 to prevent a turning of the threaded sleeve 25. The setting of the shaft 1 together with the parts mounted thereon can therefore be effected in axial direction in any desired way by turning the hand wheel 23.V When the setting has beenfeifected the slotted and threaded sleeve 25 is clamped tightly upon the spindle 23 so that the setting becomes xed. If the printing c linder 10 is to be removed, this will be e ected by means of the flattened `surface 28, andit 1s only necing case 13 (*ig. 1 on the right) whose smallest diameter is greater than the greatest outside diameter of the printin cylinder 10 and of the tightening device 5.V hen the bearing case 13 with the bearin 14. has been taken out, the surface 28 will' e placed close to the casing wall c securely supporting in nearly horizontal .position the shaft 1 tigether with the

bearing

13, 14 in the wa By `means of the improved mechanism above described, .the shaft 1 can be axially shifted to adjust theprinting cylinder or 'shell 10, which is usually of copper, accu rately with respect tothe printing cylinders on the other printing rollers of the machine. `Because of the fact that the driving gear 16 is loose on the shaft 1, it can remainconstantly in mesh with its driving pinion (not shown) irrespective of the axial shifting of such shaft. Motion is therefore transmitted from the gear wheel 16 Vto the shaft 1 in an indirect manner' with the aid of the bolt 20,

sleeve 21 and sliding hub 22 and disc 18, the

latter beingkeyed to the shaft. Axial movement of the wheel 16 with the shaft 1, which may occur when the wheel becomes stuclcor frozen to the shaft, is prevented by the finger 17 Whichlmay be positioned on a fixed part of the machine and engages a groove 16 on the wheel.

My improved arrangement of bearings al*- lows the resetting of theprinting cylinder .into the original position to take place in a quick manner without play by means of the conical bearing case; a bearing case of cylindrical or rectangular shape necessitating much play for the easy`exchanging Vor replacement of the cylinder on account of the edging, the eliminating of which would be accompanied by diffculties'of design.

I claim:

l. Multi color sheet intaglio printing machine comprising, in combination, an impression cylinder, printing cylinders movable towards the impression cylinder and away from it, each printing c linder supported by a shaft,l at least two earings for supporting the s haft, a `third bearing, and stops on the shaft at or next to the third bearing and adapted to secure the shaft against axial shifting.

2. Multi color sheet intaglio printing machine comprising, in combination, an impresg sion cylinder, printing cylinders `movable to` wards the impression cylinder and away from it, eachprinting cylinder supported by a shaft, at least two .bearings for supporting the shaft, a third bearing, stops on the shaft at or next to the third bearing, and means for fixing said third bearing after its setting against themachine frame.

3. Multi color sheet intaglio printing machine comprising, in combination, an impression cylinder, printing cylinders movable t0- wards the impression cylinder and away from it, each printing cylinder supported by a shaft, at least two bearings for supporting the shaft, bearing brackets on the two main walls of the frame of the machine for supporting the two iirst bearings, a third bearing for said shaft, stops on the shaft at or next to the third bea-ring, and means for supportingsaid third bearing.

4. Multi color sheet intaglio printing machine comprising', in combination, an impression cylinder, printing cylinders movable towards the lmpression cylinder and away from it,each printing cylinder supported by a shaft, at least two bearings for supporting the shaft, bearing brackets on the two main walls of the frame of the machine for suphub, said bearing element arranged inthe thirdframe wall, means for securing said element in the frame wall against turning and shifting; said bearing element provided with a slot on the front face, and means for forcing the walls of said slot toward each other to iix the hub of the hand wheel after the setting of same with respect to the ma chine frame.

5. Multi color sheet intaglio printing machine comprising, in combination, an impression cylinder, printing cylinders movable towards the impression cylmderand away from it, each printing cylinder supported by a shaft, .at least two bearings for lodging the shaft, bearing brackets on the two main walls of the engine frame of the machine for supporting the two first bearings, a third ybearing, the machine frame having also a third.

owall, a hand wheel havin a hub on the end of the printing cylinder s aft, stops on said shaft on both =sides of the hub of the hand A wheel, threads on the hub of said hand wheel ,a threaded bearing element receiving said hub, said bearing element arranged in the third frame wall, means for securing s aid bearing element in the framev wall against turning and shifting; said bearing element provided with a slot on the front face, and 0 means for forcing the walls of said slot toward each other to fix the hub of the hand wheel after the setting of same with respect to the machine frame. the upper part of said bearing element being flattened, such flattened portionadapted to support the shaftwafter lthe removal of one of the two other bearings.`

6. Multi color sheet intaglio 'printing machine comprising, in combination, an impression cylinder, printing cylinders movable to- 40 wards the impression cylinder and away from wheel on' the shaft of the printing cylinder,l

-' frame,

it, each printing cylinder supported by a A shaft, at least two bearings for supporting the shaft, a third bearing, stops on the shaft at or next to the third bearing, a driving a linger rigidly connected with the machine fram"e,'a groovein said wheel engaged by'said finger, a catch on said wheel, a sleeve around said catch, a second sleeve around said first sleeve, and a driven wheel rigidly connected with the printing cylinder shaft, said driven wheel having a radial slotfor receiving'thel second sleeve. a

7. Multi color sheet intaglio printing machine comprising, in combinatiom'an impression cylinder, printing cylinders ymovable towards the impression cylinder and away from it, eac printing cylinder supported by a shaft, at least two bearings for supporting the shaftia third bearing, stops on the.shaft at or next to the third bearing, a driving wheel on theishaft of the printing cylinder,"A

a finger rigidly connected with the engine a-groove in said wheelfengaged by said ingeig'a catch on said wheel, a sleeve laround said catch, said sleeve having an eccentricalshape on its outside, a second sleeve around said first sleeve, anda driven wheel -rigidly .connected with the' printing cylinder shaft, said driven wheel having av lradial slot for receiving the second sleeve.

for supporting said cases and provided with a conical seat, the' outer surface of said cases beinonical to fit said seats.

9. ulti color sheet intaglio printing ma- .chinecomprising, in combination, an impres- ,slon cylinder, printlng cylmders movable towards the impression cylinder and awayA from it,\each printing cylinder supported by ashaft, at least two bearings for supporting the shaft, a third bearing, stops on the shaft mentioned bearin s, said shaft being axially movable in said earings, and brackets for supporting said cases and provided with a conical seat, the outer surface of said cases being conical to 'fit said seats, the smallest diameter of the conical seat being greater than the cylinder.

10. In a multi-color sheet intaglio printing machine, in combination, an' impression cylinder, printing cylinders movable towards 'the impression cylinder and away from vit and having removable shells, a shaft sup orting each of said printing cylinders, two ear-` ings forsaid shaft-free of abutments, where.- by said shaft may be shifted longitudinally at or next to the third bearing, bearing for A .receiving the bearing elements of the firstgreatest diameter of the printing los in said bearings, at least one of sa1d bearings being easily removable, .the seat of such bearing being larger than the largest diameter of the print-ing cylinder, and a third bearing for said shaft, said bearing adapted to support said shaft upon assembly' ordisassembly of the shell.

. 11. In a multi-color ysheet intaglio print ing machine, in combination, an impressiony cylinder, printing cydinders movable towards the impression cylinder and away from it and having removable shells, a shaftsup porting each of said printing cylinders, two' bearings for said shaft free of abutments,

whereby said shaft may be shifted longitudinally in said bearings, at least one of said.

bearings bein easily removable,- the seat of such bearing eing larger than the largest diameter of the printing' cylinder, 'a third 4bearing .forA said( shaft, and means in said third bearing for adjusing said shaft longi tudinall a bearing element of said third bearing ing attened, the attened portion being adapted to support the shaft upon removal of said easily removable bearing.

ARNOLD EGLI.