US1542644A - Paper-transferring mechanism - Google Patents

Description

June 16, 1925. 1,542,544

S. H. PLUM, 2D., ET AL PEER 'I'RANSFERRINC- MECHANISM Filed Aug. 30, 1924 4 1 2 5 fR/W 7AM, 2M

Evwen/toz! Patented June 16, 1925.

UNITED STATES "s. HAIN'ESVPLUM, 2D, or MADISON, AND PERCY L. SIBOLE, or nnwenmnnw JERSEY,

ASSIGNORS TO KL YMAX FEEDER COMPANY, A CORPORATION OF NEW JERSEY.

PAPER-TRANSFERBING MECHANISM.

Application filed August 30, 1924. Serial No. 735,060.

To all whom it may concern:

Be it known that we, S. HAINES rum,-

2d, residing at Madison, Monroe County,

, New J ersey,and PERCY L. SmoLn, residing at Newark, lssex County, New Jersey, both *citizens ofthe United States, have invented certain new and useful Improvements in Paper-Transferring Mechanisms, of which the following is a specification.

TlllS invention relates to printing presses and the object of the invention is to improve the paper transferring mechanism disclosed in the United States Patent Number 1,398,- 036 dated October ll, 1921. The improve, ments herein disclosed may of course also be used in connection with other types of mechanisms for the same or similar purposes.

As disclosed inthe said patent, to which I shaft over which and in contact with which the platen. I

the sheet passes from the transfer table to One object of this invention is to'provide improved means for operatingor rotating the run off shaft. g

Another'object of the invention is to improve the said shaft with a view of improv ing the manner of feeding the paper to theplaten. It has been found that the surface of the run 0H shaft plays an important part with reference to the kind of paper which may be successfully fed by the transfer table. kept in mind that this invention as well as the one disclosedinthe 'saidpatent refers to presses of the type of Chandler L Z'P1'lC8j0b bers equipped with an automatic feed,which for. obvious reasons is operated to the full capacity speed, and that as a consequence, the single sheet of paper contacts with'the run off In connection herewith it should-be I the invention with parts removed and parts of the press 'wit-hregards'to its speed;

shaft for only a very short time. The functlo'n of the run off shaft is'to speed the sheet of paper on its way to the platen to be registered on the latter by the usual platen registers and grippers before the press closes 1n printing positlon. The run off shaft should therefore be operated at a rather high speed consistent with the speed of the press and the kind of paper to be printed.

With paper or stock of medium and heavier weights, or even with paper of usual light weight, the weight of the paper itself is usually sufiicient to cause the-necessary friction between the paper and the run off shaft to obtain the full benefit of the function of the shaft. This is true when the surface of the shaft-is smooth or Per haps even polished. v t

:But when very thin or light weight paper is to be printed, as for instance French folio as it is called, the weight of the paper is not sufficient to produce friction between it and the shaft, and the rotation of the latter, has no effect upon the speed of the paper in its travel towards the platen. Therefore, when such light weight paper is used, it passes on to the platen by gravity only from the transfer table, and as a consequence it has been'found that the sheet of paper often curls upon itself or folds upon itself as the platen moves down into printing position, causing waste and loss of time in the operation of the press. This is a very serious objection to the use of automatic feeders.

This invention, therefore, also includes means for improving the run off shaft to provide proper friction for the feedingof very light weight papers.

The invention will be more-fully understood from the following specification read inconnection with the accompanying drawing in which certain of sleeves or rollers which maybe used to improve the surface of the run off shaft.

Fig. 7 illustrate a certain arrangement of such sleeves or rollers.

Referring to the drawing, the frame of the press is marked 3 and the platen 6. The paper 52 rests on a paper support 41 mounted on the paper feed table 24, which in turn rests upon suitable brackets and 18 secured to the press.

The transfer table comprises an upper rod 81 pivoted in brackets 82 and the feed table, two side arms 83, 83 and a run off shaft 84 journaled in the lower ends of the side arms.

To the rod 81 there are secured paper supthe said rod constitutes a rack for operating the pinion 87. The rack S-is pivoted at 9 to a bracket 10 suitably secured to the platen. A weight 11 or equivalent means keeps the rack in mesh with the pinion.

Figure 1 illustrates'the p'artsin the posi tion whenthe paper passes from the transfer table to-the platen. The sheet 12, shown in dotted lines, has just been deposited on the transfer table and the run off shaft.

As now the platen moves down into printing position,-or when the press closes as it is sometimes said,the rack S rotates the pinion 87 and the run off shaft 84 in an anticlockwise direction and the sheet is run off quickly onto the platen and into proper position thereon for printing as illustrated in Figure 2. 7

At th1s time, of course, the rack 1S no longer in contact with pinion, but it is held in the position shown in Figure 2 in readi-.

. stroke.

ness to engage the pinion on the return The transfer table 1n the meantime has moved up 1nt0 the position shown 111 Figure? 2 by means not illustrated herein,

but fully disclosed in the patent referred to. This is necessary ,topermit the, platen to pass from. under the shaft 84 as is obvious.

On .the return movement, the platen passes in under the transfer table which is then lowered into the position shown in Figure 1, and the parts are so arranged that as soon as the platen has passed the shaft 84, the rack 8 engages the pinion. to be ready'for operation on the next movement of the press. y

The operation of the run off shaft from means movable with the platen is desirable because the higher speed obtained, also because the operating means may be very simple in construction and move out of the way when the platenls down.- It also provides a positive drive for the run off shaft in a very tion.

simple manner and without the necessity of complicating the parts on the transfer table for this purpose.

As stated hereinbefore, in order to handle very light weight stock, the surface of the run off shaft must be of a character to cause sufficient friction between the shaft and the paper so as to speed the latter on to the platen. To thisend, we propose to provide the shaft 84 with a wooden roller or sleeve 20 having a roughened surfaceas indicated at 21 in Figure 4. The sleeve 20 may be 0011- tinuous or made in sections. Or again, the shaft 84 may be provided with a rubber sleeve or roller 25, Figure 5, the natural surface 26 of which produces the necessary fric- Under certain circumstances the sleeves or rollers may be toothed or gear like as shown at 27 in Figure 6. If desired, rollers of both types may be alternately put on the shaft 84 as shown in Figure 7.

The sleeves or rollers are of'course fitted tightly on the shaft so as to rotate therewith.

It has been found that when the shaft 84 has been thus provided with a roughened or grippy surface, the weight of even a very light sheet of paper as it falls on the shaft is sufficient to cause the necessary friction, and the sheet is positively and quickly moved or run off onto the platen and does not curl or fold.

The improved surface of the run off shaft together with the operation thereof in perfect synchronism with the movement of the platen results in quicker and more certain travel of the sheet from the transfer table to the platen, and does not permit the sheet to slowly curl or fold over on itself. The result of the combined effect of the improvements herein disclosed is that the sheet, regardless of weight, is moved quickly and directly on to the platen and on the latter continues straight into proper position for printing.

We claim 1. The combination of a press having a platen, paper transferring means, a shaft in the latter over which shaft and in contact with which the paper passes onto the platen from the said transferring means and means on the platen for operating the said shaft.

2. The combination of a press, a platen,

paper transferring means, a shaft in the latter for running off the paper from the transferring means to the platen, a pinion on said shaft and a rack secured to the platen for operating the said pinion to rotate the said shaft.

8. The combination of a press, a platen, transferring means for transferring the paper to the platen, mechanism in said transferring means for imparting speed to the paper as it moves towards the platen and means on the latter for operating the said mechanism.

' 4. The combination of a press, a platen, means for transferring the paper to be printed to the platen, a run off shaft in said transferring means, over which shaft and in contact with which the paper passes in its travel towardsthe platen, means on said shaft for increasing the friction between the same and the paper as the latter contacts therewith and means for operating the said shaft. 7

5; The combination of a press, a platen, a transfer table for transferring the paper to the platen, a run off shaft insaid transfer table, a pinion on said shaft, a rack for operating said pinion and means on the platen for keeping the rack and pinion in engagement at predetermined intervals durprinted on to the platen, a pinion on saidv shaft, a rack, means for pivoting the same on the said platen and a We1 l1i for keeping the said rack and pmlon 1n driving engagement.

S. HAINES PLUM, 2ND. PERCY L. SIBOLE.

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