US1332665A - Sheet-delivery mechanism - Google Patents

Description

w. K. H0DGMAN.I

SHEET DELIVERY MECHANISM. APPLICATION FILED OCT. 20. 1915.

"1,332,665; Patented Mar. 2,1920.

2 SHEETS-SHEET l.

w. K. HODGMAN. SHE'El DELIVERY MECHANISM.

APPL'TCATION FILED OCT. 20.1915.

UNITED" STATES PATENT OFFICE.

WILLIS. K. HODGrMAN, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO MIEI-ILE PRINTING PRESS & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SHEET-DELIVERY MECHANISM.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed October 20, 1915. Serial No. 56,839.

a citizen of the United States, residing at Taunton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvments in Sheet-Delivery Mechanism, of which the following 18 a specification.

At the present time, one of the most popular devices for delivering sheets. from a printing press consists of a reciprocating carriage equipped with either sheet carrying sticks or tapes which receive each sheet from the usual delivery tapes, printed side up, and carry it to piling position, during the outward stroke of the carriage, and which are then removed from beneath the sheet, allowing it to fall upon thev delivery board during the return or inward stroke of the carriage.

This reciprocating carriage sheet delivery is very satisfactory excepting for use 1n the rapid piling of full size sheets and 1t then becomes inadequate because the sheet carrying sticks or tapes, asthe case may be, leave the tail end of the sheet at the same level as are the tops of the sticks or the tapes during their outward stroke and consequently the tail end of thesheet being piled 1s apt to be caught by the front parts of the stlc s or tapes on their next outward. stroke 1t not having had time to fall below the path of the said sticks or tapes.

The object of my invention is to provide a sheet delivery device of the character described but free from the defect mentioned, and I accomplish my object by moving, the sticks or tapes out at one level and returning them at a lower level so that the sheet being piled leaves the sticks or tapes at a level below their outward path.

In the drawings I have illustrated my invention as applied to a two-revolution bed and cylinder printing press in which it will be understood-all the parts, excepting those introduced by my invention, are constructed andv operated in the usual manner. It is obvious, however,,that while I have. described and illustrated my invention as applied to.a certain type of printing press, it is applicable to any type of printing press or other machine wherein it is desirable to receive,

carry and pile in a rapid and orderly manner, fiat sheets of paper or the like. In the drawings Figure 1 is a side elevation of a portion of a two-revolution bed and cylinder printing press, embodying my invention with some of the parts broken away to more plainly show the construction of others;

Fig. 2 is a plan view thereof; and

Figs. 3 and a are respectively a side elevation and top plan of details.

The moving parts are mounted in suitable frame-work consisting of the usual side frames land 2 and cross stays, not shown. The usual feed board 3, impression cylinder 4:,stripper fingers 5 and sheet-carrying tapes 6 are all plainly shown and operate in the well known manner to receive and convey the sheets through the press and to the place where they are received by the sheet delivery or piling device, which is of the reciprocatory type and operates to receive the sheets from the tapes 6 and to carry and pile them, the same side up as received, upon the delivery board 7.

That I will designate and refer to as the reciprocating carriage consists of the two side bars 8, eight flanged track wheels 9 rotatably mounted on an equal number of studs 10 fixed in the bars 8. front tape drum 11 and rear tape drum 12, each rotatably mounted on their respective stay rods 13 and 1 1, which are bolted between the ends of the bars 8.

Stretched around the tape drums 11 and 12 are the endless sheet carrying and piling tapes 15. The upper runs of these tapes pass through the tape clamps 16, fixed on the stay rod 17, which is bolted between the two track rails 18.

The tape clamps 16 each consist (Figs. 3 and 4) of the U-chaped piece 16 and the swinging tongue 19, and they operate in the usual manner to permit the tapes 15 to travel with. the reciprocating carriage during its outward or sheet carrying stroke and to clamp and hold the upper runs of the tapes, causing them to peel from beneath and pile the sheets during the reciprocating carriages inward or sheet-piling stroke.

In every reciprocating carriage sheet delivery, previous to my invention, the track rails are stationary and guide the reciprocating carriage and its sheet carrier, tapes or sticks asthe case may be, to andfro in exactly the same path, or in different paths having portions inclined to other portions, or the carriage itself is pivoted to permit one end to rise and fall with consequent change of inclination to the horizontal. Without some provlslon for change 1n elevatlon of the outward and return path of the carrying and piling members, the speed of such a delivery is limited, for full size sheets, because when the tail end of the sheet parts company with the top of the sheet carrier as the latthe total vertical travel of the carrier is sub-,

stantially equal to its vertical thickness; then by gradually lowering the track rails from their uppermost level commencing shortly after the reciprocating carriage has begun its outward stroke, the carrier and the sheetupon it are gradually lowered until when the tail end of the sheet parts company with the top of the carrier, the whole sheet including its tail end is left at a level below the path of the carrier at the beginning of its next outward stroke and free from any possible collision with the front parts of the carrier and with ample time to fall below the lowermost path of the carrier as it completes the stroke and delivers the next sheet.

Having this end in view, the track rails 18 are mounted on four studs 20 fixed in four levers 21, two of which are fixed on the short 7 rock shafts 22, journaled in the frame standards at the left, and the other two are fixed on the long rock shaft 23 journaled in the frame standards at the right. Also fixed on the shafts 22 are the two levers 24 and their free ends are connected by suitable studs and by the two vertical connecting rods 25 to the levers 26 and 27 which are fixed on the long rock shaft 28 journaled in the side frames 1 and 2. I

The lever 27 is a plain singleend lever but 26 is a bell crank lever, and connected to its lower end by a suitable stud is theconnecting rod 29 which is forked at its other end to slide on the cam shaft 30 and it carries the stud 31 and its roller 32, which latter cooperates with the track rail position.- ing cam 33 fixed on one end of the cam shaft 30. The cam shaft 30 is driven by,

shaft from the cam 33 is'the usual reciprogearing (not shown) in the usual manner to make one revolution during each complete cycle of the press;

Fixed on the opposite end of the cam cating carriage crank arm 34: which, by

,means of the usual studs,xconnecting rods,

levers and rock shaft, all plainly shown, acts to reciprocate the reciprocating carriage, in the-usual and well known manner and complete 'my new and novel sheet -'delivery mechanism. 7

The operation is as follows In the drawings I have shown the reciprocating car-- riage at the beginning of its outward stroke and it will now be readily understood that the track rails 18, are positioned vertically by the cam 33 through the connections described, and the operation is such that during the continuance of the stroke the reciprocating carriage and sheet carrying and piling tapes 15 are at the upper level until the front tape drum 11 is directly above the tail end of-a full size sheet piled on the delivery board 7, when they gradually sink a distance equal to the diameter of the tape drum 11 until the tape drum 11 has passed on the inward stroke from beneath the tail end of the sheet being piled, when they gradually rise again tothe upper level ready for the next sheet. 1

At 35, Fig. 1, I have shown in dotted lines the position of the tail end of a full size sheet when the tape drum 11 passes from beneath it, and it is obvious that the drum cannot collide with it on its next outward stroke because the extreme tail end of the falling sheet 35 is already level with the under side of the drum and the drum must complete its inward stroke and commence to move outward before it can reach the sheet and by that time the sheet will have fallen to astill lower level. I v

As will be understood, the cam 33 makes one revolution during each complete. cycle of the press or, in other words, it makes one revolution for every sheet printed, and it is sojshaped. as to sustain the reciprocating carriage at its upper level during about onetwelfth of the outward stroke; then tentwelfths of the revolution is used to gradually lower the carriage and the sheet upon the tapes to its lowest level which is reached just as the tail end of a full size sheet parts company with the tapes 15 and the remaining one-twelfth of a revolution is used to raise the carriage to its upper level again, whichis reached just as it begins its, outward stroke;

I claimt V 1. In a sheet delivery mechanism of the character described, the combinationlwith reciprocating; carriage, of a track therefor extending above thepiling table, andmeans to lower the track bodily during the piling stroke of the carriage and to raise the track bodily prior to the next stroke, whereby to discharge the sheet at a lower level than that at which it is carried, to prevent collision between the discharged sheets and the carriage in 1ts next stroke.

2. In a sheet delivery mechanism of the character described, the combination with reciprocating carriage, of a track therefor extending above the piling table, rock shafts extending transversely of the carriage path, lever arms on said shaft and supporting the track at its two ends, means acting in synchronism with the reciprocation of the carriage to rock the shaft to lower the track bodily during the final portion of the delivery stroke of the carriage and to raise the track bodily during the final portion of the return stroke without disturbing its relation to the horizontal, whereby to discharge the sheet at a lower level than that at which it is first carried outwardly to prevent collision between the discharged sheets and the carriage in its next stroke.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIS K. HOD GMAN.

Witnesses:

FRED H. Norris, NOBLE W. ASHLEY.

Images