US1563383A - Printing press - Google Patents

Description

Dec. 1 1925O E. R. LINEBAUGH PRINTING PRESS Filed Oct. 50. 1923 2 SheetS-Sheet l mwN.

Dec. 1.l 1925- ,y 1,563,383

E. R. LINEBAUGH PRINTING PRESS Filed oct'. 30. 1923 2 Sheets-Sheet 2 Patented Dec. i, 1925.

N 1,563,383 u1-uTED STATES PATENT OFFICE.

' EDWARIP R. LINEBAUGH, 0F BARBERTON, OHIO, ASSIGNOR T0 THE DIAMOND MATCH COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

PRINTING PRESS.

Application led October 30, 1923. Serial No. 671,638.

To all 'whomz't may concern.'

Be it known that I, EDWARD R. LINE- BAUGH, a citizen of the United States, and resident of Barberton, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Printing Presses, of which the following is a specification.

This invention relates to printing presses, and particularly to Kelly presses wherein the periodic forwarding of the sheets to the printing mechanism can be Varied to enable double rolling as well assingle rolling of the ink'rollers on the type form in the intervals between the printing operations, such ldouble rolling being employed for work re-r quiring eXtra heavy inking of the form. The said Kelly-presses are"equipped with stopping mechanism which,'in the event of the non-delivery of a sheet from the paper 1 magazine, or of the non-forwardin of a sheet to the printing mechanism, during the single rolling operation, isA automatically actuated toei'ect the stopping of the press. lManually operativev meanns is .employed to render the stopping mechanism inactive preparatory to the'double rolling operation, and hence if during such operation a sheet be not properly forwarded to the printing mechanism, it is necessary that the attendant manually stop the machine and rectify the trouble. Unless this be promptly rdone the type form will become clogged with ink and must be washed, as ,otherwise a number of the next succeeding sheets delivered to the printing mechanism will be spoiled before the type clear themselves. This not only results in loss of production,'but it also limits the attention of the operator toa single machine.

My invention is designed to overcome the objections mentioned; and to that end I provide simple and eiicient means whereby the press, including the paper forwarding mechanism, is automatically stopped in the event of the non-delivery of a properlyspaced sheet by. such mechanism to the printing mechanism during the double rolling operation, as will be hereinafter described and claimed. u

In the drawings- Figure 1 is a partial 'side elevation of a Kel/ly press embodying a preferred form of my invention.

11 the inclined feed table leading thereto,

and 12 the vertically-movable table upon which the sheets are stacked and thence successively delivered to the feed table by the action of suitably-arranged pneumatic forwarding wheels 13 carried by a driven shaft I 14. These wheels are mounted in co-operative relation to the mouth of a suction device 15 having a valve controlled port l16 which by actuation of the valve 17 may be opened and closed at predetermined intervals-in such a manner that each succeeding top sheet of the stack may be raised and forwarded to the impression cylinder during each succeeding rotation of the wheels, or during each alternate rotation of the wheels, as desired. .In the former case the printing form receives a single rolling of ink for each impression, and in the latter case the form receives a double rolling of ink for each impression. the stack is advanced to and upon forwarding tapes 18 on the feed table leading to the impression cylinder in the usual manner.

The valve 17 for the suction device is 20 which is periodically operated by means Each sheet when removed from' of a cam 21 on the ,shaft 14 of the forward-` ing wheels. On oneside of the arm 20 is a lug 22 below which is a star wheel that is carried by a shaft 24 journaled in the frame, which star wheel is intermittently rotated so as to make one-fourth of a rotation during each rotation ofthe forwarding wheels. This star vwheel has two long and two short arms 2 5, 26, respectively, arranged in alternate relation, one of the shorter arms being adapted to be periodically engagedby a pin 27 projecting from the cam 21 and` thereby turned through an arcL of to a position in which the longer arms of the star wheel re ster with the lug 22. When the star whee is in this position the arm 20 is held from the lowerl face of the cam 21 and, the valve 17 being raised, the port 16 is open. Hence no forwarding of the sheet from the stack is effected by the wheels 13. In the next succeeding revolution of the cam 21 the star wheel is turned to bring one of its shorter arms into registry with the lug 22, in which case, the valve being down, the port is closed. Hence a sheet will be forwarded by the rotating wheels 13. By this construction and operation of parts a sheet is fed from the stack in each alternate rotation of the feed wheels, thus permitting the printing form to receive a double rolling or inking between the printing operations, as described in Patent No. 1,401,707, dated December 27, 1921.

Journaled in the frame structure, adjacent the delivery end of the feed table, is a transverse rockv shaft 28 equipped with spaced-apart arms 29 bearing pivoted detector lingers 30 that normally depend into the path of the leading end of the traveling sheet on the feed table. Each of the fingers is provided with a lateral latch projection 31 which is operative to engage a stationary cross-bar 32 when the finger is in normal position, the construction being such that when the leading end of a sheet impinges against the opposing finger such finger is swung outwardly to release its latch projection from the bar 32. On one end of the shaft 28 is an arm 33 which is connected by means of a link 34 with a suitably disposed rock lever 35 bearing a roller 36 that is resiliently held in co-operative relation to a cam' 37 on a driven shaft 38 by means of a spring 39 suitably attachedto the lever. The contour and time of the cam are such that when its higher surface is in contact with the roller the detector finger is held with' its latch projection in engagement with the bar, against the action of the spring 39, and that when the lower surface of the cam is in contact with the roller the spring is permitted to act upon its connections with the shaft 28 at the instant a progressing sheet is due at the detector linger. Consequently if the sheet be properly forwarded it will impinge against the detector finger and release it, and, coincidentally, the spring will effect the partial rotation of the shaft 28; but if, on the other hand, no sheet should be presented to the latched finger the latter will resist the action of the spring and thus prevent the motion of the rock sha-ft. To the end of this rock shaft opposite the arm 33 is secured a crank arm 40 n pivotally supporting one end of a. forwardly-eXtending trip bar 41 which is jointed near its opposite end to an arm 42 pivotally mounted on the side of the frame. The forward end of the tri bar is provided with a laterally-projecting stud 43 that bears against the up-projecting arm 44 of a throw-olf pawl 45. This pawl is pivoted to one arm of a crank-lever 46 that is fulcrumed at 47 on the adjacent side of the frame, the other arm of said lever bearing a roller 48 in operative contact with an appropriate cam 49 on the driven shaft 38. The contour and time of the cam 49 are such as to effect periodic oscillation of the cranklever 46 and the pawl 45. This pawl is maintained normally in engagement with the notched upper end 50 of a vertically reciprocating rod 51 by means of a suitablydisposed spring 52, and hence during the actuation of the crank-lever and the throwofi' pawl the rod is intermittently depressed. The upper end of the rod is slidable in a guide bracket 53 on the frame, its lower end being jointed to a rock-lever 54 fulcrumed on the side of the frame. The lever is jointed in turn to a link 55 included in the usual impression throw-off connections. On the lower portion of the rod 51 is a movable stop-actuating member comprising a depending pivoted switch pawl 56 which overlies a vertically-movable switch button 57 included in the circuit for the electric motor by means of which the press, Including the paper forwarding mechanism, is driven by suitable gearing. When the throw-off pawl 45 is in engagement with the upper end of the rod 51, the pawl in its descent forces down the rod and the switch pawl 56, which latter depresses the switch button in a manner to break the electric circuit and de-energize the motor, thereby stopping the press; but when, on the other hand, the throw-off pawl is disengaged from the rod, the latter, being unaffected by the operation of the throw-off pawl, permits the switch button to remain in its normal position to complete the circuit and energize the motor.

The relative positions of the detector fingers 30 and the associated switch controlling parts above described are such that during single rolling each succeeding sheet advanced by the forwarding wheels impinges against and releases the said fingers. Thus the crank arm 40 and the trip bar 41 are thrown forward to disengage the throwoff pawl from the rod 51, and in consequence the switch pawl 56 is inactive and the switch button is unaffected thereby. If. however` a sheet is not properly supplied to, or forI warded through the feeding mechanism, the latched detector fingers are unaffected, and the throw-off pawl maintains its position in engagement with the upper end of the rod 51. Conseqently the latter is depressed anu the switch pawl 56 is forced upon the switch button in a manner to break the motor circuit and operate the impression throw-0E connections.

The foregoing described mechanism is present in the well-known Kelly press, and therefore it requires no further detailed description herein. Heretofore when in the operation of the said press delayed feeding llO of the 'sheets-was required in order to permit a double rolling or inking between the` means out of engagement with the switch button and was thus retained until the completion of the double rolling work, as otherwise the press would be automatically stopped during every alternate revolution of the press, that is, during each delayed interval of feeding a sheet. Therefore the constant attendance of an operator at each of the presses was necessary, to enable him, if a mis-feed occurred, to stop the machine by hand and correct the trouble before the succeeding sheets could be spoiled or the type become clogged with ink, as previously mentionef" According to my invention provision is had whereby the switch pawl 56 is automatically moved into and out of active position in respect to the switch button in alternate revolutions of the press during the double rolling operation; that is, in one revolution of the press while a sheet is being forwarded, the switch pawl is positioned directly above the switch button, and the latched detector fingers 30 are actuated by the travelfing sheet to effect the disengagement of the wherein a sheet is or should be forwarded tends.

maintained in operative contact with a cam the switch pawl is again positioned above the button; andso on. Since by this sequence of operations the throw-0E pawl 45 is disengaged from the rod 51 only when a sheet is properly passing to the impression cylinder, it follows that the press can make but one revolution before its being shutoft' by the failure of a sheet to pass properly to the cylinder. w

In th'e preferred form of embodiment of my invention I fulcrum on that side of the machine adjacent the switch controlling devices, a lever whereof the longer arm 58 depends in proximityto the switch pawl 56 and terminates in a notched or slotted angular portion 59 through which such pawl loosely eX- The upper arm 60 of the lever is 61 on the star wheel shaft 24, by means, for example, of a spring 62 which 1s secured at its ends to the lower arm of the lever and to the frame. The cam 61 is formed with two diametrically opposite high points or lobes which, when the cam is aiixed to the shaft 24, are in alignment, or substantially so, with the respective short arms of the star wheel, and since `this wheel, together with the cam 61, makes one fourth of a revolution during each revolution of the press," the cam actuates the lever in a manner to effect automatically the movement of the switch pawl 56 over and awa from the switch button in alternate revo utions of the press during the double rolling operation. p

It is to be understood that I do not limit my' invention to the specific construction herein disclosed, as the mechanisml shown and described may be modified within the principle of the invention and the scope of the a pended claims.

I c almy 1. In a printing press having stop mechanism under the control of a traveling sheet and including a movable stop-actuating member, and having also pneumatic sheet forwarding means. and means, including a rotary star wheel, to render alternate actuations of said forwarding means inoperative, a cam operative with said star wheel, and means intermittently movable by said cam to shift the said stop-actuating member into idle and active positions in timed relation to the alternate actuations of the forwarding means.

.into idle and active positions in timed relation to the alternate warding means.

Signed at Barberton, in the county f of Summit and State of Ohio this 27th day of October A. D. 1923.

vEDWARD R. LINEBAUGH.

actuations of the ror-

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