US1326537A - Inking mechanism for printing-presses - Google Patents

Description

c. w. SMITH; lNK-lNG MECHANISM FOR PRINTING PRESSES.

APPLICATION FILED JUNE 16. L919- Patented Dec. 30,1919.

C. W. SMITH.

lNKlN-G MECHANISM FOR PRINTING PRESSES.

Patented Dec. 30, 1919.

4 SHECTS-SHEET 3 APPLICATION FILED JUNE 16, 1919.

672457 560 Warn Wk.

C. W. SMITH.

INKING MECHANISM FOR PRINIING PRESSES.

APPLICATION FILED JUNE 16. 1919.

Patented Dec. 30, 1919.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

CHARLES W. SMITH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO KEYSTONE TYPE FOUNDRY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented Dec. 30, 1919.

Application filed June 16, 1919. Serial No. 304,379.

To all whom it may concern:

Be it known that I, CHARLES W. SMITH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Inking Mechanism for Printing-Presses, of which the following is a specification.

One object of my invention is to provide improved inking mechanism for printing presses, including a movable inking plate for conveying the ink to the form-inking rolls, and which will be operative to evenly distribute the ink upon the inking plate.

Another object is to provide improved means which will prevent the application of ink to the inking plate when there is no impression during the operation of the press, such for example as when the operator does not insert a sheet of paper to be printed, and so that there will be no accumulation of ink upon the inking plate which is not necessary to form a proper impression.

A further object is to make the parts of my invention of a simple and durable construction.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which- Figure lis a side elevation of a part of a printing press, such for example as the printing press shown in my co-pending United States application, Serial Number 302,433, filed June 7, 1919, illustrating my improved inking mechanism,

Fig. 2 is a fragmentary plan view of a part of the press shown in Fig. 1, and illustrating my improved inking mechanism, said figure being drawn on an enlarged scale from that shown in Fig. 1,

Fig. 3 is a fragmentary elevation of one end of Fig. 2,

Fig. 4 is a fragmentary elevation of the opposite end of Fig. 2,

. Fig. 5 is a framentary plan view showing certain of the elements of my present in vention,

Fig. 6 is a section taken on the line 66 of Fig. 5,

Fig. 7 is a section taken on the line 77 of Fig. 5,.and

' Fig. 8 is a section taken on the line 8-8 of Fig. 6 showing, in addition, a part of the supporting structure.

Referring to the drawings, 9 represents a cylinder to which sheets of paper are attached, said cylinder having an oscillatory movement for conveying sheets to the printing-form 10, said printing-form forming a part of a carriage 11, said carriage also including an inking plate 12 adapted to engage, during a horizontal reciprocating movement of the carriage, the form-rollers 13 which are mounted on the frame 14 in suitable adjustable supports 15. The parts above mentioned may be of any suitable construction or design and do not by themselves form a part of my present invention.

The frame 14: includes at one end an ink fountain 16 in which is rotatably mounted a fountain roll 17. This fountain roll is posi tioned within the ink within the fountain 16. A shaft 18 is journaled within the frame 1 1 and has two arms 19 secured thereto. These arms at their outer ends form a rotatable support for av duct roll 20. The shaft 18 has a lever 21 secured thereto, said lever being connected by a link 22 with any suitable means for imparting a rocking movement to the shaft 18, said means being illustrated as-a cam 23 secured to a rotatable shaft said cam being operative on a roller 25 on the link 22. The link 22 has a forked end 92 embracing and being supported by the shaft 24-. The cam 23 acts to move the link 22 through the medium of the roller 25 when the plate 12 moves thereunder during the reciprocation of the carriage 11 and after the arms 19 have been raised by the cam 23.

The framel l has adjustable supports 26 thereon and these supports form bearings for the shafts 27 28 and 29 of ink distributing rolls 30, 31 and 32, said rolls being arranged in a row as clearly illustrated, and serving in a manner hereinafter described to evenly distribute the ink which has been applied by the duct roll 20, over the upper surface of the inking plate 12. All of the rolls 30, 31 and 32 are adapted to rotate due to the engagement of said'inking plate, and the rolls 80 and 32 also have a longitudinal movement imparted to them so as to spread the ink over the width of the inking plate 12, said longitudinal movement being imparted by the elements now to be described.

A bracket 33 is secured to the frame 1% and provides a pivot for a lever 81'. The lever 3-1- has two trunnions and 36 at its opposite ends, said trunnions being disposed at opposite sides of the pivotal axis of the lever 23%, as clearly shown in Figs. 2 and 5. The carriage 11 has an angular cam portion 37 which is adapted to engage a: roller 38 on one end of the lever A rod 39 has a spring thereon which is backed against the frame 1 1, said spring serving to move the roller 38 into the path of movement of the cam 87, and it will be readily understood that during the reciprocation of the carriage 11, the cam 37 will swing the lever 34- in one direction and when the roller 38 is released from the cam 37, for example when the carriage 11 moves in an opposite direction, the spring 10 will swing the lever in a direction opposite to the in vement imparted to said lever 81; by the cam 37. The trunnions 35 and 36 are interposed between the flanges 11 and 12 of collars 43 and respectively on the rolls 30 and It will thus be noted that the above described swinging movement of the lever 34.: will impart a longitudinal reciproating movement to the rolls .30 and 32 so as to distribute the ink in the direction of the width of the inking plate 12. Further more, the rolls 30 and 32 will be moved in opposite directions at the same time, for example when the roll 30 is moving toward the right, as viewed from Fig. 2, the roll 32 will be moved toward the left, and alternately, when the roll 30 is moved toward the left the roll will be moved toward the right By this arrangement the ink rill be moved simultaneously toward opposite side edges of the inking plate and the central roll 81 will merely rotate. In this manner, the ink is distributed evenly over all portionsoi the inking plate so that when the plate moves into engagen'ient with the form-rolls 13, the latter will receive ink therefrom, and the ink will be evenly spread over the surface of the form-rolls to be applied to the form as it passes thereunder on its way to impart an ii'npression to the paper upon the cylinder 9.

For the purpose of preventing the application of ink to the inking plate 12, if the operator for any purpose whatever fails to feed paper to the cylinder 9, I provide aswinging detent or stop 15 on the shaft 16 of the fountain roll 17. This detent 15 is weighted at 17 at its bottom below the shaft e6 so that normally it will swing its top end 18 into the path of the arms 19 during; their downward movement so as to stop the fallin movement of the arms 19 before the duct roll 20 has had a chance to engage the fountain roll 17 and thereby pre ventthe duct roll 20 from receiving ink from the fountain roll. In this manner the inking plate 12 is prevented, from receiving an excess amount of ink and the impression or printing will be uniform on all the sheets printed. During the normal operation of the machine, however, the detent is swung out of the path of movement of the arms 19 by the hooked end -19 of a link 50, said hooked end being adapted to engage a pin 4-9 on the bottom of the detent -15, this action being clearly illustrated as starting to take place in Fig. 4-. The link is pivotally connected to an arm 51 which is attached to a plate 52. A number of finare secured to a rock-shaft 54, said rockshaft having an arm 55 thereon, the arm being provided with a pin 56 adapted to be engaged by the cam The cam 57 is adapted to be rocked by a link lever 58 to ause said fingers 53 to be moved into and out of recesses 59 in a feed table 60. The shaft 5 1- has a screw threaded post 61 thereon adapted to engage a plate 62, said plate being secured to a pawl 63. The plate 52 has a small cam 61- thereon which provides a shoulder 65 for engagement with the pawl 63, said pawl being pivotally mounted on a fixed shaft 66 and serving to prevent the movement of said plate and the arm 51.

During the normal operation of the press, when the operator inserts the sheets between the fingers and the recesses 59, the fingers will be prevented from entering the recesses 59 and the pawl 63 will be held up out of engagement with the shoulder 65 so that t isplate 52 and arm will receive a swinging movement and thereby cause the hooked end of the link 50 to swing the detent -15 out of he path. of the arms 19 and permit the duct roll 20 to engage the fountain roll, to suppl the necessary amount of ink to the inking plate 12 to permit the proper impression to be made. However, if the operator fails to insert a sheet between the fingers 53 and the recesses 59, the fingers will move into the recesses 59, which movement will permit the pawl 63 to fall behind the shoulder 65 so that the plate 52, arm 51 and link 50 will be prevented fron'i moving, and the detent 45 will swin by gravity into a position so as to prevent the arms 19 from dropping and thereby serving to prevent the duct roll 20 from engaging the fountain roll 17. In this manner no excess ink will be supplied to the inking plate 12 when there is no sheet to be printed. This action prevents the accumulation of ink upon the printing-form so that all impressions are similar.

It will be understood. that while I have described specific means for causing the link to be moved during the normal operation of the press and permitted to remain inoperative when no sheet is fed to the press, that any suitable means can be employed for moving or not moving the link 50 as above described.

While I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Havin hus described my invention what I claim as new and desire to secure by Letters Patent is:

1. The combination of a movable inking plate; ink distributing rolls for engagement with said plate; a swinging lever pivoted between its ends; trunnions on said lever at opposite sides of the pivot, said rolls having portions which said trunnions respectively engage; a roller on said swinging lever; a cam movable in conjunction with said plate and for engagement with said roller to swing the lever in one direction; and a spring for swinging said lever in the opposite direction when said cam moves away from said roller; substantially as described.

2. The combination in a printing press of a movable inking plate; an ink fountain roll; a duct roll; means for moving said duct roll. into engagement with said fountain roll to secure ink therefrom and for moving said duct roll into the path of said plate to apply said ink thereto; a pivoted detent adapted to swing into the path of move ment of the duct-roll-moving means at each cycle of operation of the press; means operative during the printing action of the a press to swing said detent out of the path of said duct ro-ll moving means; and means for rendering inoperative said detent moving means at other times to cause the latter to form a stop for said duct roll moving means to prevent said duct roll from engaging said fountain roll; substantially as described.

3. The combination in a printing press of a movable inking plate; an ink fountain roll; a duct roll; means for moving said duct roll into engagement with said fountain roll to secure ink therefrom and for mov ing said duct roll into the path of said plate to apply said ink thereto; a pivoted detent; a hooked member; means for moving said hooked member into engagement with said detent to move said detent out of the path of said duct roll moving means during each printing, action of said press; and means for rendering inoperative said hooked member at other times, whereby said detent forms a stop for the duct roll moving means to prevent said duct roll from engaging said fountain roll; substantially as de scribed.

i. The combination with a printing press embodying an ink fountain and duct roll,

of a detent normally holding the duct roll out of engagement with the ink fountain; a member adapted when actuated to move the detent at each cycle of operation of the press; and means controlled by a sheet of paper in feeding position on the press to actuate said member.

5. The combination with a printing press embodying an ink fountain and a form; of means to convey ink from the fountain to the form; means normally withholding such conveyor from action, and means controlled from sheet in feeding position on the press to withdraw the holding means.

6. The combination with a printing press embodying an ink fountain a form and a duct roll; a means to swing the duct roll upon a pivot into engagement with the ink fountain at one limit of its movement; means normally withholding such duct roll from engagement with the ink fountain; and means controlled from a sheet in feeding position on the press to withdraw the holding means.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES WV. SMITH.

Witnesses:

ANNA BENTON, CHAs. E. Po'r'rs.

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