US1142435A - Roller-carriage. - Google Patents

Description

E. P. JENNINGSQJR.

ROLLER CARRIAGE.

APPLICATION FILED MAY4.1914.

Patented J 11110 8, 1915.

2 SHEETSSHEET I.

Em anon P. Jamming s Tn,

V "fin-=1: PETERS co.. PHOTO-LITHCL, WASHINGT E. P. JENNINGS, JR.

ROLLER CARRIAGE.

APPLICATION FILED MAY 4. 1914.

Patented June 8,1915.

' 2 SHEETS-SHEET 2.

E'mer'sonl? Jenhinqain,

THE NORRIS PETERS 60., PHOTO LITHOH WASHINGTON, D. C."

ROLLER-CARRIAGE.

Specification of Letters Patent.

Patented June 8, 1915.

Application filed May 4, 1914. Serial No. 836,086.

To all whom it may concern Be it known that I, EMERSON P. JEN' NINGS, J11, a citizen of the United States, residing at Lehi hton, in the county of Carbon and State of Pennsylvania, have invented certain new and useful Improvements in Roller-Carriages, of which the following is a specification, reference being had therein to the accompanying drawing.-

This invention relates to roller-carriages and is designed more particularly for use in connection with inking rollers for printing presses.

In certain types of presses the inking roll-. ers revolve about an inking drum and formbed and are yieldingly mounted to permit them to accommodate themselves to the varying radii ofthe different parts of the form-bed and drum. To this end the rollers have radial movementand are pressed inwardly by springs. If the rollers are revolved about the drum and form-bed at a high rate of speed they are subjected to a very strong outward thrust due to centrifugal force and they will not properly engage and ink the form carried by the form-bed.

It is not practical to overcome the centrifugal force by the use of stronger sprlngs because the space lIiWlllCll the springs may be mounted is so limited that a long spring cannot be used and if a stifi short spring is used it has not sufficient'flexibility to provide a satisfactory operation. Inasmuch as it is necessary that the ink rollers engage the form once for each impression that is taken from the form it will be obvious that the speed of the press and the number of 1mpressions taken in a given time Wlll be in direct ratio to the speed at which the inking rollers revolve, and as a result of the outward thrust upon the rollers, as aboveexplained, the speed of the press in practical operation is, in fact, limlted.

The object of the present invention is to provide a roller-carriage construction which will enable such presses to be operated at an increased rate of speed. To this end it is a further object of the invention, first to provide a roller-carriage construct on which will permit the number of impressions to be increased relatively to the speed of the roller-carriage and, second, to provide a roller-carriage construction which be operated at a higher rateof speed without increasing the outward thrust upon the inking rollers.

. of the structure shown in Fig. 2; and Fig. 4

is a detail view of one of the wheels for the inking roller.

In these drawings I have illustrated one embodiment of my invention and have shown the same as applied to a printing press of a known construction and compris ing a main frame consisting of side walls, 1, having mounted therein a normally fixed platen 2.. A combined form-bed 3 and ink ing drum 4 aremounted in the main frame of the press for 'inovementto-ward and away from the platen, this being accomplished preferably by supporting the ends of the V drum in slide blocks 5 mounted in the respec tive side members. The slide blocks are actuated in unison by means of pitmen 6 secured to wrist pins 7 mounted on driving gears 8 arranged on the opposite sides of the press and driven from a shaft 9 which is connected with a suitable source of power. A web of paper 10 is drawn over the platen by means of suitable feeding mechanism 11. Fig. 1 of the drawings is a sectionalview taken just inside of one of the frame members and it will be understood that the slide block Sand those parts cooperating therewith are duplicated on the other side of the press, which is not shown. It will be further understood that this particular type of press is chosen for the purpose of illustration only and that the invention is appli cable to presses of other kinds.

The inking rollers which take the ink from the inking drum and apply the same to the form are, of course, mounted to move .with the combined inking drum and formbed and, to this end, the roller-carriages are revolubly mounted upon reduced portions or trunnions'12 provided at the opposite ends of the drum. Each carriage comprises a bearing ring or collar 13 rotatably mounted on the respective trunnions and having secured thereto a sprocket wheel 1a which is actuated by asprocket chain 15 passing over a sprocket wheel 16 eccentrically mounted on the shaft 17 ofjthe gears 8. The eccentricity o'f the sprocket wheel 16 causes the chain 15 to be maintained taut during the reciprocatory movement of the combined inking drum and form-bed. The bearing 13 of each roller-carriage is provided on its opposite sides with segmental or fan shaped plates 18, each of wnich has mounted thereon a series of inking rollers 19 which are capable of radial movement. There being two sets of inking rollers it will be obvious that the rotation of the roller-carriage will cause the form to be inked twice for each revolution of the roller-carriage. Consequently, by properly timing the movement of the roller-carriage with respect to the movement of the form-bed, the form-bed can be caused to move at twice the speed of the roller-carriage and the number of im pressions taken can be doubled without increasing the speed of the roller carriage. The segmental plates 18 may be connected with the bearing portions 13 in any suitable manner but they are preferably cast integral therewith so that the plates and bearing ring constitute a single structure or sup porting frame.

The inking rollers may be mounted upon the segmental plates 18 in any suitable manner. Preferably these plates are provided with a series of radial slots 20 in which are slidably mounted bearing blocks 21, each bearing block being provided with a bearing in which is mounted one end of the respective roller. The inking roller, bearing block and the cooperating parts are all constructed with a view to making them as light as possible, thereby reducing the outward thrust imposed thereon by centrifugal force when the roller-carriage is revolved at a given speed. To this end the bearing block 21 comprises an elongated block of metal. The block is provided with a longitudinal recess 22 which not only reduces its weight but provides a socket for a spring 23 which is confined between the bearing block and a stop arranged at the outer end of the slot 20 in which the block is mounted, thereby enabling a spring of the greatest possible length to be used. In addition to making the bearing block hollow it is also made of a metal of very light weight and for this purpose 1 preferably employ an aluminum compound, such as that known as alzine. The bearing block, in addition to the hollow body portion, comprises a bracket 24 rigidly secured to the body portion, preferably by casting the same integral therewith, and having its end arranged alongside of and spaced away from the body portion. The end of the bracket is provided with an open bearing 25 which has a hard metal bushing 26. This open bearing is adapted to receive a trunnion 27 forming a part of one of the inking rollers. The inking rollers comprise bodies of the usual composition mounted upon metallic cores 28. Each core comprises a cylindrical body portion of light Weight material, such as alzine, which is hollow and consequently of very light weight. The end portions are reinforced with hard metal to support the trunnion 27. To this end each trunnion 27 is formed separately from the body portion of the core and is made of hard metal with a bushing 29 adapted to enter and to be firmly secured within the end of the hollow body portion 28 of the core. The bushing 29 is separated from the trunnion 27 by a disk 30, the diameter of which corresponds to the diameter of the body portion 28 of the core and when the core is in its completed condition this disk forms the end of the core proper. The springs which are provided for holding the rollers in en gagement with the face of the form necessarily exert a considerable pressure on the bearing block while the rollers are passing over the inking drum. To relieve the rollers of this pressure which would tend to distort the same, the trunnions 7 are projected be yond the bearings 25 and have mounted thereon wheels 31, which wheels are arranged between the bracket 2% and the body of the bearing block and travel over tracks arranged at the opposite ends of and moving with the form-bed and ink drums. In the present instance, the extended end portions of the drum and form-bed constitute this track. These wheels are also formed of light weight material, such as alzine, and in order that they may have the necessary wearing qualities the wearing surfaces thereof are reinforced with hard metal. In the present arrangement the central opening in each wheel is provided with a hard metal bushing 32 having a hexagonal opening to receive the end of the trunnion 27. The periphery of each wheel. is also provided with a hard metal tread 33 which will have the necessary wearing qualities. To prevent the accidental displacement of the rollers with reference to the open bearing 25 I have provided retaining devices which are mounted on the bearing blocks and engage the trun nions of the rollers to retain them in the proper position within their bearings, but which can be readily manipulated to release the rollers to remove the same. In the pres ent instance this device comprises a hooklike catch 34: pivotally mounted on the bracket 24 and adapted to extend about the trunnion 27 of the roller. The catch is provided with a handle by means of which it may be manipulated and this handle is preferably of resilient material and is so shaped and arranged asto yieldingly engage the surface of the bracket, and to exert a pressure thereon sufiicient to retain the catch in engagement Withthe trunnion. This catch is of thin material and does not add materially to the weight of the bearing bracket.

The operation of the roller-carriage and the various parts thereof will be readily understood from the foregoing description and it will be apparent that when the car riage is constructed as herein described two impressions may be made for each complete revolution of the roller-carriage and that the. roller-carriage may be revolved at a comparatively high rate of speed without causing an outward thrust to be exerted upon the rollers sufficient to interfere with their proper engagement with the form on the form-bed. Consequently, the number of impressions which may be taken may be very materially increased. In actual practice the first embodiment of the invention-in a roller-carriage having a single set of inking rollers resulted in an increase of not less than 25 per cent. in the number of impressions. i I

While I have shown and described one embodiment of my invention it will be understood that this has been chosen for the purpose of illustrationonly, and that I do do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a persion skilled in the art.

Having thus fully described my invention, what 1 claim as new and desire to secure by Letters Patent, is

1. The combination, with a combined inhing drum and form-bed, said structure having a circumferential portion constituting a. track, of a carriage mounted to revolve about said inking drum-and form-bed and having a radial guideway, a bearing block slidably mounted in said guideway and comprising a body portion and a bracket spaced away irom' said bodyportion and provided with an open bearing, a roller having a trunnion journaled in said bearing, a wheel mounted on said trunnion between said body portion and said bracket and adapted to travel over said track, and meansicarried by said bearing block to retain said trunnion in said open bearing.

The combination, with a combined inking drum and form-bed, said structure having a circumferential portion constituting a track, of a carriage mounted to revolve about said inking drum and form-bed and having a radial guideway, a bearing block slidably mounted in said guideway and comprising a body portion and a bracket spaced away from said body portion and provided with an open bearing, a roller having a trunnion journaled in said bearing, a wheel mounted on said trunnion between said body portion and said bracket and adapted to travel over said-track, and a hook-shaped catch mounted on said bracket to en age said trunnion and retain the same in said open bearing. 7

8. The combination, with a combined ink ing drum and form-bed, said structure havtrack, or" a carriage mounted to revolve about saidinkingdrum and form-bed and having a radial guideway, a bearing block slidably mounted in said guideway and havinga bearing, an ink roller comprising a core having a trunnion journale'd in said bearing, and a wheel secured to said roller and adapted toftravel over said track, said bearing block, core andwheel being formed of light weight metal with hard metal bear-r ing surfaces, whereby the outward thruston saidparts due, to centrifugal force is reduced. p c v 41-. The combination, with acombined inking drum and form-bed, said structure'having a circumferential portion constituting a track, of a carriage mounted to revolve about said track, a series of bearing blocks slidably mounted on said carriage, each bearing block comprising a hollow body portion of light weight material, said hole low body portion being adapted to receive a spring, a bracket carried by said body portion and having a bearing, an inking roller comprising a hollow core of light weight-material, and a trunnion of hard metal secured to the end of said hollow core 'and journaled in said bracket, and a wheel or light weight metal having a hard metal tread secured to said trunnion and adapted to travel ov r said track.

* '5. The combination, with an inking drum I and form bed, said structure having a por tion constituting a track, of a carriage mounted to revolve about this track, a series of bearingblocks slidably mounted on said carriage, each bearing block comprising a hollow body portion of light material, said hollow body portion being adapted to receive a spring, said bearing block having a bearing, an ink roller having a trunnion journaled in said bearing, and a wheel mounted on said trunnion and adaptedto travel over said track.

6. The combinatio'n,-with a combined inking drum and formbed, said structure having a circumferential portion constituting a track, of a roller-carriage mounted to revolve about the axis of said drum, a bracket of light weight metal mounted on said carriage for radial movement vand having a bracket provided with an open bearing and spaced away from the body portion of said bracket, an ink roller comprising a hollow .core of light weight metal, a trunnion rigidly secured to the end of said hollow core,

'journaled in said bearing and having a non- "oircular port1onpro3ecting beyond sald bearing into the space between the bracket and the body portion of the bearing block, and a wheel of light weight metal mounted between said bracket and thev body portion of said bearing block and having a non-circular bushing of hard metal to receive the end of said trunnion and having a tread of hard metal.

; 7. The combination, with an inking drum having a trunnion at one end thereof, and a form bed, of a roller-carriage having a bearing portion journaled on said trunnion, a slotted plate carried by said bearing portion and having the outer ends of its slots closed, slide blocks mounted in said slots and each having a body portion provided with a recess, a spring mounted in each recess and confined between said block and the closed outer end of said slot, and inking rollers journaled in the respective slide blocks.

8. The combination, with an inking drum having a trunnion at one end thereof, and a form-bed, of a roller carriage having a bearing portion journaled in said trunnion and comprising oppositely extending plates, said plates being provided with substantially radial slots, slide blocks of light weight material mounted in said slots and having hardened bearings, springs to resist the outward movement of said slide blocks, and inking rollers having cores of light weight material with hardened trunnions journaled in said carriage, whereby said carriage may move at a relatively lower speed than said form-bed.

9. The combination, with an inking drum having a trunnion at the end thereof and a form-bed, of a roller-carriage having a bearing portion journaled on said trunnion, segmental plates projecting from the opposite sides of said bearing portion, each plate having a series of slots therein, the outer ends of said slots being closed, a bearing block slidably mounted in each of said slots and having a longitudinal recess therein, a spring mounted in said recess and confined between the bearing block and the end of the slot, and an ink roller comprising a hollow core having a trunnion journaled on said bearing block.

10. The combination, with an inking drum and form-bed, of a carriage mounted to revolve about said inking drum and form-bed, a series of bearing blocks of light weight material slidably mounted on said carriage, each block having a hardened bearing, springs to resist the outward movement of said bearing blocks, inking rollers each having a core of light weight material with a hardened trunnion journaled in said hardened bearings.

In testimony whereof, I afiix my signature in presence of two witnesses.

EMERSON P. JENNINGS, JR.

Witnesses: v

P. M. GRANT, ELIZABETH B. GAssNEn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentsa I Washington, D. G.

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