US1052468A - Feeding-tape mechanism for printing-presses. - Google Patents

Description

G. A. EDDY. FEEDING TAPE MECHANISM FOR PRINTING PRESSES.

APPLICATION TILED AUG. 10, 1910.

Patented Feb. 11, 1913.

2 SHEETS-SHEET 1.

A, EDDY. FEEDING TAPE MECHANISM FOR PRINTING PRESES.

A'PPLIOATIONIILED-AUG.10,1910. Patented Fb.'11,1 913.

2 SHEETS-SHEET 2.

TABS ATE GEORGE A. EDDY, OF CHICAGO, ILLINOIS, ASSIGNOR IO THE GOSS PRINTING PRESS COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING-TAPE MECHANISM FOR PRINTING-PRESSES.

Specification of Letters Patent.

Patented Feb. 11,1913.

Application filed August 10, 1910. Serial No. 576,553.

To all whom it may concern:

Be it known that I, GEORGE A. EDDY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain-new and useful Improvements in Feeding-Tape Mechanism for Printing-Presses, of which the following is a specification, reference beoperative relation to the paper as soon as a given speed is attained.

As is well known, feeding tapes or lead tapes are common in printing machinery for the purpose of conveying the web from one portion of the machine, directly acting upon the web, to another portion of the machine, and particularly for the purpose of leading a web through the machine in starting the press. Of course as the web is fed positively through certain operative-parts of the ma chine, during their movement the tapes which lead the web from such operative portion of the machine to another must move at the surface speed of the web. lVhen the web, however, is ledcompletely through the machine, its leading tapes become'unnecessary, as the continuous web passes through the machine by the engagement therewith of the several operative parts. In presses, however, in which a high speed is attained during their printing operation, the con:

tinuous running of the tapes and of the pulleys which carry them becomes very objectionable on account of the vibration caused by the extremely rapid rotation and movement of the rotating and moving parts.

It is the object, therefore, of my invention to provide a new and improved mechanism by which the leading tapes may be used to thread the web through the press in starting the press and when the press is running at a low speed, but in which the moving parts may be stopped automatically as soon as a given speed is attained. I

In the accompanying drawings-figure 1 is a view of a portion of the end of a printing press, lying toward the folding and delivery mechanism, and showing diagrammatically certain portions of the printing mechanism; Fig. 2 is an enlarged detail, being a top or plan view of the mechanism for automatically stopping the rotation ofthe tape feeding shaft; Fig. 3 is. an enlarged detail, being a-section on line 33 of Fig. 2; and Fig. 4 is an enlarged detail, being a section on line 1-4: of Fig. 2.

Referring to the drawings,-5 indicates a portion of the bed. of a printing press. 6 indicates one of the impression cylinders, and 7 one of the type cylinders, of such 'press, the pitch lines of the driving gear being indicated by dotted lines. As the parts may be of any well-known description and form of themselves no part of my pres ent invention, it is believed it is unnecessary to describe it or illustrate. it further here.

A indicates a web, which is passing through the press in the direction indicated by arrows in Fig. 1.

9 indicates a shaft j onrnal ed in the framework of the press in any suitable manner and carrying pulleys 10 in the usual manner.

11 indicates a roller shaft, which is jour naled in suitable bearings, as 12, in the framework of the press and carries secured thereto tape pulleys 13. 7

It will, of course, be understood that a plurality of pulleys 10 and 13 are mounted on the shafts 9 and 11, but I have only shown one in order not to unnecessarily encumber the drawings.

14- indicates tapes which pass around pulleys 10 and 13 moving in the direction shown by the arrows inthe figures; Of course there will be a plurality of tapes, the same in number as the tape pulleys above described.

15-16 indicate guide-rollers, under and over which the web A passes in its way through the press.

The upper sides of the tapes 14, as will be best seen in Figs. 1 and 4, lie immediately below the'iveb so that by their move-,

ment they will lead the web, after passing the impression and type cylinders 6- and 7, forward toward the rollers 1516. The

gearing of peripheral flange 21;

of roller 15 and connected with the gearing of the press so as to rotate in the direction indicated by the arrows. o

19 indicates a gear, Which is loosely mounted on the shaft 11 at one end-thereof and. so as to rotate freely thereon, and is provided with a hub 20.

21 indicates a. disk, which is keyed, or otherwise secured, upon the hub 20 of the gear 19 and provided with a projecting 22 indicates a pawl, which is pivoted at one end upon the face of the disk 21 inside the flange and close thereto and is provided with an engaging hook 22 atone end thereof.

23 indicates a collar, which is keyed, or otherwise, secured, upon'the shaft 11 and is. provided with a peripheral flange 23 in registry with the pawl 22.

24: indicates a ratchet-notch, which is cut in the flange 23 andadapted to be engaged by the hook 22 of the pawl 22.

25- indicates-a light spring secured to the.

inner side of the flange 2l -and bearing upon. the pawl '22 in such a way as to normallyhold it in engagement wit-h the flange 23 on collar 23.

' 26 indicates idler pulleys mounted in arms 27 on shaft 28, which is mounted in the framework of the press in the usual manner. The pulleys 26' simply 'operate as tension pulleys on the tapes in the well-known'mam ner. 1

The parts above described rotating in the direction indicated byarrows, as above set forth, the gear19 will carry with it the disk 21, which'is secured to its hub-as above described, and the pawl engaging the ratchetnotch 24 on collar 23 which-is keyed to the shaft 11, will rotate the shaft 11, thus rotating the tape pulleys 13 and moving the tapes in the direction, shown by the arrows. WVhen the press is started and the web is fed forward between the impression and type cylinders 6 and 7, they will engage the lead end of the sheet, feed it forward to the feed rollers 15-16, and forward it through the press. The spring 25 is so adjusted that when any predetermined speed of rotation is reached itwill yield under the centrifugal 'force of the pawl 22, which centrifugal force, of course, tends to throw the free end of the pawl outward out of engagement continues.

with the toot-h 24. The tooth of the pawl therefore being freed from engagement with, the notch, the rotation of the collar 23, and consequently the shaft 11, ceases automatically and the tapes cease their movement as long as. the predetermined speed In practice, and with the high speed presses on which'this device is intended to be employed, the spring is so constituted as to hold the pawl against the ratchet tooth against the action. of centrifugal force until the-shaft attains a speed of about 400 revolutions per minute, at

, which speed the centrifugal force of the- .pawl overcomes the actionof the spring and the pawl flies out. In the presses for which this device is especially designed if the pawl were not so silenced, the shaft 11 would be running at a speed of about 2400 .revolutions per minute by the time the press at-' ,tained its full running speed, and the shafts carrying the pulleyswould be thrown int-o such a state of vibration that they would be likely to break.

I have shown and described my improved mechanism. as applied upon a press in a position near the end of'the press at which the web passes into the folding and delivery mechanism just after the web is operated on by the last printing couple, and this is perhaps the position inwhich such leading tapes would .be most frequently used.) Of

course, however, my invention might be employed inany form of high'speed press and the leading tapes applied toany other convenient position in the press without departing from the object ofmy invent-ion.

lrVhat -I claim as my invention and. desire to secure by Letters Patent is,1

1. In a web printing press, in combina ti'on, a shaft, pulleys secured to said shaft, forwarding tapes on said pulleys adapted to to said press, a disk loose on said shaft,

gearing for driving said disk, a ratchetwheel secured on said shaft, a pawl carried by saiddiskand adapted to engage said ratchet and also adapted after a given speed is reached to be automatically disengaged from said ratchet by the action of centrifugal force.

GEORGE'A. EDDY.

\Vitnesses CHARLES E. Prenatal),- WV. H. De BUSKI Copies of this patent may be obtained for live cents each, by addressing the Commissioner of I'atents,

Washington, D. 0.?

Images