US897902A - Ink-roller trip for printing-presses. - Google Patents

Description

'PATENTED SEPT. 8, 1908.

C. L. JOHNSTON. INK ROLLER TRIP FOR PRINTING PRESSES.

APPLICATION FILED JAN. 15,1906.

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PA'TENTED SEPT. a, 1908.

G. L. JOHNSTON. INK ROLLER TRIP FOR PRINTING PRESSES.

APPLICATION FILED JAN.15,1906.

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OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO FRANK BROWN REDINGTON, OF CHICAGO, ILLINOIS.

INK-ROLLER TRIP FOR PRINTING-PRESSES.

Specification of Letters Patent.

Patented Sept. 8, 1908.

Application filed January 15, 1906. Serial No. 296,116.

T 0 all whom it may concern:

Be it known that I, CLARENCE L. Jor-ms- TON, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Ink-Roller Trips for Printing-Presses, of which the following is a specification.

My invention relates to printing presses and pertains especially to an attachment for a printing press of the character employing a reciprocating type-bed and a co-acting impression cylinder movable intermittently to and from the type-bed.

Its object is to provide a simple, practical means for governing the feed of ink to the form so that the feed of ink from the fountain may be automatically discontinued when the impression cylinder is set-up to its highest point and no paper is passing through the machine, although the machine may still continue to run. If the ink distributing rollers are allowed to continue to receive ink from the fountain when the machine is running, but with no rinting going on, they will collect undesirab y thick layers of ink on them and smear up and clog the type on the form, all of which is very objectionable. I have designed a simple mechanism which will automatically discontinue the delivery of ink from the fountain whenever the impression cylinder is thrown out of action while the type bed or form still continues its movement. At the same time, I have provided means whereby the ink feed-roller may be put in operation, even with the impression cylinder set up and held at its highest point, to enable the form to be properly inked (as where the press has stood idle over night) before sending any paper through the machine.

The invention consists of the parts and the construction and the combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a side elevation of a part of a ress sufficient to show my invention, with the feed roller taking ink. Fig. 2 is a front view in partial section of the feed-roller trip mechanism in the position of Fig. 1. Fig. 3 is a viewsimilar to Fig. 1 with the cylinder set up and the feed or oscillating roller tripped and inoperative. Fig. 41 is a view simi ar to that of Fig. 2 viewed on Fig. 3.

In the drawings the novelty is indicated in full lines while the old features of the press are represented by dotted lines.

A represents the frame of a printing press and 2 the impression cylinder which is 1 adapted to rise and lower at each reciprocation of the type bed or form which is not shown as it forms no part of the present invention, but which slides back and forth on 1 suitable horizontal tracks on the frame A so as alternately to receive the ink from the form rollers, (also not shown) and to traverse the space beneath the imperssion cylinder 2 1 and print on the paper when the latter is pressed down onto it by the impression cylinder. The cylinder rises to allow the inked form to pass under it freely in one direction; the sheet being fed to the cylinder and the cylinder being lowered to press the sheet down on the form to print during the move ment of the form in the other direction. The cylinder is suitably mounted to rise and lower coordinately with the reciprocating movement of the type bed or form. Usually the cylinder is carried on springs 4. and connected with rods 5 which connect to blocks 6 on each side of the frame. The springs keep the cylinder in normally elevated or set-up position out of contact with the type bed. The cylinder is depressed by the operation of the eccentrics 7 on shaft 8, acting through the blocks 6 and rods 5 in opposition to the springs. When the cylinder 1s set-up in inoperative position shaft 8 is stationary.

9 is a cam shaft operated coordinately with the rest of the apparatus and carrying a cam 10 which engages at each revolution a roller 11 on an arm 11 of a rock shaft 12. The latter carries a second arm 13 to which a rod 14 connects by a swivel joint. Rod 14 operates a bell-crank lever 15 which carries the oscillating feed roller 16 which conveys ink from the fountain 17 to the distributing plate 3 by which the ink is delivered to the form rollers. The rollers 3 are ink distributing rollers. The roller 16 is maintained normally in contact with roller 17 by gravity and a spring 17.

My invention resides in a means for controlling the operations of the feed roller 16 so that it will deliver ink to the distributing plate 3, or not deliver it, just as may be desired when the cylinder is set up and inoperative and the press continues to run. This function is here shown as achieved by the inadapted when moved in one direction to pre-.

sent itself in the path of arm 11, being suitably supported on one side against a fixed part of the press frame. WVhen the lever 18 is moved down it leaves the arm 11 and the roller 16 free to operate. The stop is preferably operated synchronously with the up and down movements of the impression cylinder, and this synchronous movement is here shown as effected through the medium.

of a block, an angular lever 19 fulcrumed. at

20 to be operable by the block, and a link 21 connecting the lever 19 with the stop member 18. A s ring 22 having one end attached to a 'ixed point of support and the other to the lever 19 causes the latter to remain in contact with the cam projection 23 on block 6 so that the lever 19' travels up and down ordinarily in unison with the up and down movement of the block resulting through the action of the eccentric 7.

In operation with. the press running and printing going on the lever 19 is depressed each time the impression cylinder comes down and the stop 18 is removed out of invterference with the arm 11 the movement of the several parts being so timed that when the cylinder and stop are in uppermost position as occurs between each impression, the operation of the roller 16 will not be interfered with. In other words, with the imression cylinder rising and lowering reguarly, the up-movement of the stop 18 will occur alternately with the back movement of the arm 11 so that the stop will ordinarily and normally be out of the path of the arm 11 a when the latter is in the position to allow roller 16 to contact with the fountain roller 17. If, however, the impression cylinder is set-up in inoperative position and the movement of the eccentric shaft 8 discontinued, the stop 18 will remain up, so that the next time the arm 11 swings back it will engage the stop before roller 16 contacts with the fountain roller 17, as indicated in Fig. 3. Although the cam shaft 9 continues to revolve and the cam 10 will act at each revolution of the shaft 9 to rock the shaft 12 and oscillate roller 16, the arc of oscillation of the roller 16 will be limited sufficiently, so that while the roller 16 may swing up each time to contact with the distributing plate 3, it will deliver no fresh ink.

In order to properly ink the form or get arm 11 A lever 24 fulcrumed at 25 is connected at one end to lever 19 by a spring 26 which is somewhat stiffer than the spring 22. The other end of the lever 24 is operated by a rod 27 sliding in a guide 28 and having a suitable hand-hold 29 in convenient reach of the operator. The rod 27 may be locked in any desired position by a suitable means as the thumb-screw 30. At all time, except when it is desired to get up color, the rod 27 is pushed down and locked so that the spring 26 will be inert and allow the spring 22 to maintain the lever 19*- snug up against the block 6. With the cylinder 2 set-up and it being desired to get up color the operator simply loosens the locking device 30 and raises on the rod 27 to pull down on lever 19* and free the stop 18 from interference with the arm 11 A resilient connection, such as spring 26 between levers 24 and 19 is employed for the reason it might happen that at the moment when the operator lifted 011 the rod 27, the arm 11" would be jammed tight against the stop 18 and hold the latter for an instant. The spring 26 allows the operator in the event of such an occurrence to lift up on'the rod 27 and lock it in position. The next moment when the cam 10 strikes the roller 11 to free the stop, the spring 26 which is stiffer than the spring 22 will pull the stop down and allow the oscillating roller 16 to assume the position shown in Fig. 1 and to take ink from the fountain.

It is possible that variousmodifications in my invention may be made without departing from the principle thereof, and I do not wish to be understood as limiting myself to my specific construction beyond what is required by a reasonable interpretation of my claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is

1. In ink feed trip mechanism, the combination of a cylinder having a regularly recurrent reciprocating movement transverse to its axis, a fountain roller, an oscillating roller, means independent of the cylinder for operating the oscillating roller, and means operative by the cylinder during its regularly recurrent transverse movements for automatically tripping the oscillating roller.

2. In ink feed trip mechanism, the combination of a cylinder having a regularly recurrent reciprocating movement transverse to its axis, a fountain roller, a feed roller, means independent of the cylinder for operating the feed roller, means operative by the cylinder during its regularly recurrent transverse movements for automatically tripping the feed roller, and means for placing said last-named means out of operative position with said cylinder.

3. In a printing press, the combination with the impression-forming mechanism, the

ink-fountain, the oscillating roller, and means to operate the latter, of means including a pivoted stop-member operative by the impressionrforming mechanism for tripping the oscillating roller to discontinue the delivery of ink from the fountain, and means for placing said stop member in inoperative position with said impression-forming mechanism to permit the delivery of ink independent of said impression-formingmechanism.

4. In a printing press, the combination of a cylinder mounted to have a limited regularly recurrent reciprocating movement transverse to its axis, a fountain, an oscillating roller, means for operating said roller, a stop member arranged to interrupt the operations of said means for operating the oscillatingroller, and means for operating said stopmember synchronously with the regularly recurrent transverse movements of said cylinder.

5. In a printing press, the combination of a cylinder mounted to have a limited regularly. recurrent reciprocating movement transverse to its axis, a fountain, an oscillating roller, means for operating said roller, a stop member arranged to interrupt the operations of said means for operating the oscillating roller, means for operating said stopmember synchronously with the regularly recurrent transverse movements of said cylinder, and means for placing said stop member in inoperative position with the cylinder.

6. In a printing press, the combination of a cylinder mounted to reciprocate in a direction transverse to its axis, a fountain, an oscillating roller, means including a rockerarm to actuate said roller, a pivoted stop member interposable in the path of said rocker-arm, means operative by the cylinder for operating said stop-member, and means having resilient connections with said stopmember for placing the latter in inoperative position.

7. In a printing press, in combination, an ink feed trip mechanism comprising a movable power-actuated stop member; a mem ber arranged to be moved by the operator for moving said stop member into inoperative position; and a resilient connection between said stop member and said other mem ber.

8. In a printing press, in combination, ink feed mechanism; a movable stop member adapted to render said feed mechanism inoperative; means for moving said stop member into operative position; automatic means for moving said stop member into inoperative position; and a device arranged to be operated by the operator for placing said stop member in inoperative position.

9. In a printing press, in combination, ink feed mechanism; a movable stop member adapted to render said ink feed mechanism inoperative; a spring tending to move said stop member into operative position; means for positively moving said stop member out of operative position; and means arranged to be operated by the operator for moving said stop member out of operative position, said last mentioned means including a resilient connection.

10. In a printing press, in combination, a cylinder; means for reciprocating said cylinder; a block moving with said reciprocating means; a fountain; an inking roller; a spring for moving said roller into communication with said fountain; a rocker arm for withdrawing said roller, from said fountain; means for rocking said rocker arm; a pivoted stop arm adapted to lie in the path of said rocker arm to shorten its spring-actuated movement; a spring tending to move said stop arm into operative position; a lever engaged by said block and connected with said stop arm for moving said stop arm into inoperative position; a member arranged to be moved by the operator for moving said stop arm into inoperative position; and a spring connecting said member with said stop arm, said last mentioned spring being stronger than the spring for moving said stop arm.

11. In a printing press, in combination, a cylinder; means for reciprocating said cylinder; a block moving with said reciprocating means; a fountain; an inking roller; a spring for moving said roller into communication with said fountain a rocker arm for withdrawing said roller from said fountain; means for rocking said rocker arm; a pivoted sto arm adapted to lie in the path of said rocker arm to shorten its spring-actuated movement; a spring tending to move said stop arm into operative position; and a lever engaged by sald block and-connected with said stop arm for moving said stop arm into ino erative position.

n testimonywhereof, I have hereunto set my hand in presence of two subscribing witnesses.

CLARENCE L. JOHNSTON.

Witnesses: I

W. A. BRACE, GEO. G. POTTER.

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