US967906A - Ink-feeding mechanism for printing-machines. - Google Patents

Description

APPLICATION FILED JUNE 11. 1909.

INVENTOR 4%! 1 40 WITNESSES J. J. HALLIWELL. INK FEEDING MECHANISM FOR. PRINTING MACHINES. APPLICATION FILED JUNE 11, 1909.

967,906. Patented Aug.23,1910.

4 SHEETSSHEET 2.

J. J. HALLIWELL.

INK FEEDING MEGHANISM FOR PRINTING MACHINES.

APPLICATION FILED JUNE 11 1909.

Patented Aug. 23, 1910.

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J. J. HALLIWELL. INK FEEDING MEcIIANIs'M FoR PRINTING MAGHINES.

APPLICATION FILED JUNE 11, 1909.

Patented Aug; 23, 1910.

4 SHEETS-SHEET 4.

ll ll 2 I INVENTOR UNITED STATES PATENT OFFICE.

JOHN J'. HALLIWELL, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO B. HOE AND 00., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

INK-FEEDING MECHANISM FOR PRINTING-MACHINES.

To all whom it may concern:

Be it known that I, JOHN J. HALLIWELL, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Ink-Feeding Mechanism for Printing-Machines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in inking mechanism for printing machines.

In a well-known type of inking mechanism, there is employed a ductor-roll which takes ink from an intermittently operating fountainroll and transfers it to a roll running continuously and at high speed, the direction of movement of this roll being the same as that of the fountain roll. In this type of inking-mechanism, the amount of ink fed from the fountain is determined by the amount of circumferential movement given the fountain roll. Furthermore, the ductor roll is mounted loosely in its bearings and while in contact with the ink-receiving roll which is running at a very high speed, is caused to rotate rapidly. When the ductor roll which is thus rapidly rotating is brought in contact with the fountain-roll, it tends to rotate the fountain-roll in the direction of its feeding movement, so that the fountain roll is not only given its feeding movement but given an additional forward movement by the ductor-roll, the result of which is to cause too much ink to be delivered to the ductor roll.

This invention has for its object to produce a simple, cheap and effective, and at the same time positively operating stopmechanism by which the -fountainroll is positively locked against movement except during such times as it is being operated by its feeding mechanism, thus preventing the fountain-roll from being turned by the momentum of the ductor roll.

With this and other objects not specifically referred to in view, the invention consists in certain constructions, and in certain parts, improvements and combinations as will be hereinafter fully described and then specifically pointed out.

In the accompanying drawingsFigure 1 is a side elevation of a construction of inking mechanism embodying the invention.

Specification of Letters Patent.

Application filed June 11, 1909.

Patented Aug. 23, 1910. Serial No. 501,457.

Fig. 2 is a sectional plan View of the construction illustrated in Fig. 1, the section being taken on the line 22 of Fig. 1. Fig. 3 illustrates a modified form of construction embodying the invention. Fig. 4 is a View similar to Fig. 3 but showing the parts in a different position. Fig. 5 is a sectional plan view of the construction illustrated in Fig.

Referring to said drawings, and more particularly to the construction illustrated in Figs. 1 and 2, 1 indicates an ink-fountain of usual type provided with the usual fountain-roll 2 mounted on a shaft 3. The ink from the roll 2 is delivered by a ductor-roll 4 to a distributing roll 5 with which cooperate other distributing rolls 6, 7 8, the roll 8 serving to deliver the ink to another ink roll 9. The ductor 4 is mounted on a shaft 10 mounted in bearings on swinging arms 11, there being one of these arms 011 each side of the machine. In the particular construction illustrated, these arms are fast to a rock-shaft 12 provided with an arm 13 carrying a roll 14 cooperating with a cam 15 mounted on a shaft 16 extending across the machine, the roll 14 being held against the cam by means of a spring rod construction, 17, of the usual type. The roll 5 is driven from the roll 9 by an intermediate 18 mounted on a stud 19, said intermediate having fast to it a small pinion 20 meshing with a gear 21 mounted on a stud 22, said gear 21 having fast to it a pinion 23 which drives a gear 24 on the shaft 16.

The construction so far described is a well-known type and any other suitable mechanism for performing the functions of the construction illustrated may be substituted therefor.

I11 constructions embodying the invention the fountain roll will, as a rule, be given an intermittent movement. While the means by which this movement is effected may be varied, in the particular construction illustrated, a short shaft 25 mounted in the frame is provided, said shaft having mounted thereon a pawl carrier which includes a hub 26 located inside the frame. This hub has projecting from it an arm 27 on which is pivoted a pawl 28 the pawl being backed up by a leafspring 29, as is usual in such constructions. The hub 26 is fast on the shaft 25. This shaft 25 has mounted on its front end in front of the frame a hub 30 from which projects an arm 31 having pivoted to it at 32' a bar 33 provided at its outer end with a slot 34 engaging a crank stud 35 movement may be given the fountain roll so as to cause this roll to deliver more or less ink to the ductor-roll, as required. While the means by which this is accomplished may be varied, in the particular construction illustrated, the hub 30 has projecting there from a handle 38 having connected to it a spring rod construction 39 of the usual type. In line with this handle and fast on the frame there is located a stop plate 40 having pin-holes 41 therein in any of which holes a pin 42 may be inserted to limit the downward movement of the handle.

As the parts are shown in Fig. 1, the

. feeding pawl has just completed its feeding stroke. As the stud 35 continues its rotation, the spring rod 39 will force the handle 38 downward until it strikes the pin 42. This checks the motion of the handle, the crank disk and stud continuing to revolve, this motion being permitted by the slot 34 in the bar 33 in which the stud works. It will be understood, therefore, that the take of the pawl 28 is determined by the position of the pin 42. If desired, the handle may be provided with a guard, as 42, to

prevent placing the pin above the handle instead of below it, it being understood that changes in adjustment are usually made while the machine is running.

It will be understood that the roll 5 to which the ductor 4 transfers the ink from the fountain roll 2 is a rapidly revolving roll, this roll, in certain types of machines, running as high as six hundred revolutions a minute, or even higher. When, therefore, the,roll 4 touches it to transfer the ink to it, it is also caused to rotate very rapidly, it being understood that it is loosely journaled in its bearings. When, therefore, the roll 4 swings back into contact with the fountain roll, it is running very rapidly and its momentum will cause a forward feed of the fountain roll unless devices are employed for preventing this action. Constructions embodying the invention will, therefore, include a positively operating stop mechanism for'preventing thefountain roll from being turned by the momentum of the ductor roll. The details of construction of this stop mechanism may be varied within wide limits, and two forms of construction are shown.

- Referring more particularly to the construction illustrated in Figs. 1 and 2, the

shaft 3 of the fountain roll is provided with a ratchet 43 its teeth facing in a direction opposite to that of the teeth of the ratchet 37. The ratchet 43 is engaged by a pawl 44 pivoted at 45 to an arm 46, the pawl being backed up by the usual leaf spring 47. This arm 46 projects from a hub 49 fast on a short shaft 50 mounted in the frame, this shaft having also mounted upon it a hub 51 from which projects an arm 52. This arm 52 is connected by a slotted rod 53 to a crank stud on the shaft 16, it being understood that this shaft extends across the machine. This crank stud and the crank disk on which it is mounted are not shown, for the reason'that they would be exactly behind the corresponding disk' 36 and stud 35 in Fig. 1. From this'description of the construction it will be understood that the two pawl carrying arms 27 and 46 begin their backward movement simultaneously and may be moved in synchronism throughout both the backward and the forward strokes,

this depending, however, on the position of the pin 42. The difference in the movement is that the arm 46 always has a definite stroke, whereas the arm 27 has a varying stroke depending on the position of the pin. At the time, however, the roll 4 strikes the fountain roll, the backward stroke of the arm 46 has been completed and its pawl 44 has engaged the teeth of the ratchet 43. It is during the forward stroke of the arm 46 that the roll 4 comes into contact with the roll 2, but this pawl 44 prevents any forward movement of the fountain roller. The pawl 28 may come into operation at any time during the forward stroke of the arm 46, but inasmuch as the two pawls 44 and 28 are moving synchronously, the fountain roll cannot run away from the pawl 28. As the pawl 44 completes its forward stroke, it is thrown out of engagement with the teeth of its ratchet 43 in any suitable manner, as, for instance, by a pin 54 which strikes the tail of the pawl. A similar pin, as 54', may be employed to insure the engagement of the pawl with its ratchet.

In the construction shown in Figs. 3, 4 and 5, the shaft 25 is employed as before, this-shaft being connected with the fountain roll shaft 3 in any suitable manner, as, for instance, by a clamp couplin 55 (see Fig. 5). This shaft is provide outside the frame with two ratchets 56, 57, these ratchets being fast on the shaft. Outside the ratchets and loose on the shaft is a hub 58, this hub being provided with two pawl carrying arms 59, 60, the arm 59 having pivoted to it at 61 a pawl 62, this pawl engaging the teeth of the ratchet 57. The arm has pivoted to it at 63 a pawl 64 which engages the teeth of the ratchet 56. The hub may also be provided, to efiect the variable movement before referred to, with a handle 38 and a spring rod construction 39 similar to that before described. The hub also has an arm or projection 65 to which is pivoted at 66 a slotted bar 67, this bar being similar to the bar 88 before described and receiving its movement from any suitable cam or crank on the machine. The pawls 62 and 64: may be backed up by springs 68, 69, as in the construction already described and a throw out pin 70 may be employed in connection with the pawl 64:. The operation of the construction is similar to that already described, except that the two pawls are eX- actly synchronous throughout their entire movement, that is, they are always in engagement with the ratchets at the same time and have the same length of stroke. Inasmuch as the teeth of the ratchets face in opposite directions, it will be seen that the ductor roll cannot cause an over-feed of the fountain roll. In this construction, also, the pin 42 before referred to acts not only to regulate the amount of take of the feed pawl, but it also acts to throw the pawl 64 into engagement with its ratchet, the'per forations in the plate 40 being so disposed that the pawl will strike this pin as the handle 38 moves downward under the infiuence of the spring rod 39.

Changes and variations may be made in the construction by which the invention is carried into efiect. The invention is not, therefore, to be confined to the particular constructions herein shown and described.

IVhat is claimed is L 1. In an inking mechanism, the combination with a fountain roll, of a ductor roll, a distributing roll receiving ink from the ductor roll and rotating in the same direction as the fountain roll, feeding and stopping ratchets operatively connected with the fountain roll, pawls cooperating with the ratchets, and operating means for the pawls, the operating means for the stopping pawl causing it to remain in engagement with its ratchet while the feeding pawl is in engagement with its ratchet.

2. In an inking mechanism, the combination with a fountain roll, of oppositely facing ratchets connected therewith, a ductor roll, a roll receiving ink from the ductor roll and turning in the same direction as the fountain roll, feeding and stopping pawls cooperating with the ratchets, and operating means for the pawls, the stopping pawl being in engagement with its ratchet while the feeding pawl is operating.

3. In an inking mechanism, the combination with a fountain roll, of feeding and stopping ratchets o oerat-ively connected therewith, feeding an stopping pawls cooperatively connected with the ratchets, means for giving the feeding pawl and ratchet a variable movement, and means for operating the stopping pawl and ratchet, said stopping pawl being caused to remain in engagement with its ratchet while the feeding pawl is operating.

4:. In an inking mechanism, the combination with a fountain roll, of feeding and stopping ratchets operatively connected therewith, said ratchets facing opposite ways, feeding and stopping pawls cooperatively connected with the ratchets, means for giving the feeding pawl and ratchet a variable movement, and means for operating the stopping pawl and ratchet, said stopping pawl being caused to remain in engagement with its ratchet while the feeding pawl is operating.

In testimony whereof, I have hereunto set my hand, in the presence of two subscribing witnesses.

JOHN J. HALLIVELL. Witnesses:

F. W. H. CRANE, GEO. V. WILLIAMSON.

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