US829248A - Feeder for printing-presses. - Google Patents

Description

PATBNTED AUG. 21, 1906.

M. J. BARNETT.

FEEDER PoR PRINTING PRESSES.

APPLICATION FILED JULY11. 1904.

mlsnuns M v Lnnmnsmawu D c PATENTED AUG. 21, 1906.

M. J. BARNETT.

FEEDER POR PRINTING EESSES.

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4 BHEETS-SHEBT 2.

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E No. 829,248. PATENTED AUG. 2l, 1906.

` M. J. BARNETT.

FEEDER POR PRINTING PRESSES.

` PPLIUATION FILED JULY 11, 1904.

4 SHEETS-SHEET 3.

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Num 0 c PATEN'IBD AUG. 21, 190e.

M. J. BARNETT.

FEEDER FOR PRINTING PRESSES.

APPLICATION FILED JULY11, 1904.

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NrrED srnjrns APif-YIENT OFFICE.

MORRISSON J. BARN ETT, OF SAN FRA NOISCO, OAL] FORNIA, ASSIGNO, BY MESNE ASSIGNMENTS, TO IVHIIS( )N AUTOPRESS COMPANY, A CORPO- RATION OF NEW` YORK.

FEEDER FOR PRINTING-PRESSES.

Specification of Letters Patent.

fratentednugci, 190e.

Application filed July 11.1904. Serial No. 215,971.

To all whom, t may concern,.-

Beit known that I, MonnrssoN J. BARNETT, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Feeders for Printing-Presses, of which the following is a specification.

My invention relates to improvements in feeders for printing-presses, the object of my invention being to.provide an apparatus of this character which will feed to the press at a high s eed accurately and with certainty sheets o paper of all sizes, thicknesses, and qualities.

My invention therefore residesin the novel construction, combination, and `arrangement of parts for the above ends hereinafter fully specified, and particularly pointed out in the c aims.

In the accompanying drawings, Figure 1 is a plan view of a printing-press, showin my improved feeder thereon. Fig. 2 is a etail horizontal section on the line AA of Fig. 3. Fig. 3 is a longitudinal vertical section on the line B B of Fig. 1. Fig. 4 is a plan-view of a.

portion of the apparatus', showing the gri pers in position for taking the paper, tllie paper itself, however, being omitted' from the iigure. Fig. 5 is a longitudinal section through the impression-cylinder and a ortion o the feeder, showin the position 01p the parts before the gripperngers are ready to take the paper. Fi 6 is a similar view showing the parts in t e position in which the gripper-fingers are taking the paper. Fig. 7 is a detail sectional view on the line C C of Fig. 4. Fig. 8 is a detail side elevation of the mechanism for operating the feed by means of a cam on the box of the impression-cylinder. Fig. 9 is a similar view showing the parts in a different position. Fig. 10 is a sectional ,view of the upper end of the pump. Fig. 11

is a' detail plan view ofthe suction-tube. Fig. 12 is an enlarged broken longitudinal sectional view of the same through the suctionports looking upward. Fig. 13 is a longitudinal sectional view of the same on the line D D of Fig. 17. Figs. 14, 15, and 16 are views similar to Fig.v 13 showing the parts in di (ferent positions. i s. 17 and 18 are views,

eatly enlarged, s owing the exhaust-pipes in dill'erent positions. Fig. 19 is a broken perspective view of the suction device, showing the two parts thereof partly in section. Figs. 20 and21 are plan'viewsof modified forms of gates. p

Referring to the drawings, 1 represents a frame of a printing-press having the side guides 2 for the bed 3, carrying the platen 4; Said bed is reciprocated through a hanger 5, depending therefrom, pivoted to a pitman 6, operated by a crank 7 on the driving-shaft 8, having the ily-wheels 9 and driven from any suitable source of power. The bed 3 communicates motion in lthe op osite direction to the impression-cylinder liy means of the racks 1() upon the bed engaging the gearwheels 11- upon the cylinder,l smaller gearwhcels 12 upon the cylinderalso engaging fixed racks 13\upon the frame of the press. None of the above, however, forms a part of my resent invention, which is restricted to the ceding mechanism for the press.

14 represents the bottom of the su plybox, which is bounded by awall 15, an a justable wall 16, secured by means of a clampscrew 17 and a slot 18 in the bottom 14, and side walls 19, which are adjustable laterally by means of clamp-screws 20 in slots 21 in the wall 16. By this means the box can be adjusted to any desired size to conform to the size of the sheets to be printed.

Near the wall 15 of the box is movably supported, so as to be on the same general level as the bottom, a rocking gate 22, which has enlarged cylindrical portions 23, which rock in bearings 24' supported upon the table near the ends of the wall 15. Said gate comprises an inner tube 25 and an outer tube 26.

he inner tube 25 is cylindrical in form, but

the outer tube 26 isof an irregular earing the cylindrical inner tube and an extension or lip 27, extending in a general tangential direction from' said cylindrical portion and havingV a thin i'ree or outer edge, as shown at 28. This free edge is serrated, having sexnicir'cular recesses 29, which register with gripper-fingers 30 on a gri )perlate 31 having pins 32 passing throng a thickened portion of the wall of the impression-cylinder. llic rounded ends of said fingers rest i upon a shaft .5.5 in. the cyl1nder,havmgcam i shaped portions 34.' By means of a fixed shaped cross-section having an en arge poru tion substantially cylindrical and surround- IOO cam 35, mounted upon lthe frame ofthe press in the path of the end of the cam-carrying shaft, said latter shaft Iis moved longitudi- The means for vcausing the lowest sheet of' the pile to adhene to the lip are as follows: 36 lis -a pum supported upon the trame of the press an having a piston 37, secured lto the upper end of .a rod '38, attached :to a yoke 39, to the lowerpontion of which is also attached a rod 4.10 sliding-iai 4a 'bearing 4l. ySaid yoke 'is -a two-way yo'ke having atransverse open' glto permit .the driving-shaft 8 to pass thdilathrough and to alflovl the yoke to 'rebiprocate vertieallyrover said` drivingshaft, and -also a longitudinal o enin-g fto permit an eccentric 42 on said sha .t 8 to revolve therein, vthe revolution 'of' which 'eccentric imparts a reciprocating motion to tlhe yoke, and thereby also to :the piston ef ,the pump. The down-ward motion of the 'piston sucks the air throhg'h a tube a3, leading to one yend of the inner tube 25 off the :rocking gate, producing an exhaust in said inner tube. Said inner tube has a seri/es .of oblong holes or slots 44 45, @if which there `are here shown five, although .the number .may be varied according `to the size of the machine or the nature of the work to be done, vthe central -slot 44 of the series being somewhat longer than the other Ifour slots 45. I"The outer tube 26 has a .corresponding number of ports 46, leading from .said slots or from proximity thereto to` elongated depression-s 47, cut in the upper lface of the lip and alternating with the semicireu'lar recesses 29 eut yout .of the edge of the lip.

Springs 48 normally hold the lip the posi-'tion shown in Figs. 5 and 7, vin which it is holding up the .edgesot fthe pile .of paper, butwhen .the cylinder has reached the stage in its movement illustrated .in Figs. -6 and 9 the lend of acam-piece 459, .mounted :upon one ofthe `boxes .orl' the cylinder, .engages an arm 5(1), extending from .the enlarged .end .of the gate, and rocks .the same so as :te .allo-w the l-i 27 ibeing brought @down Iontowthe surface ci, `the cylinder into -a substantiallyhorizontal osition. In this position it remains u1 `iti' the .top of .the cylinder begins to pass forward .from dnreetly .underneath the free edge of lthe lip, whereupon said free edge is caused to descend in order to remain in contact with the surface of the :cylinden .as the top of the clylinder moves away from said l'ree edge.. his depression of the free edge is etlec-tcd by means of a sloping shoulder .5l

in the camll), which still further rocks thearm 50, attached to the gate, causing the free edge of the lip to descend in contact with the cylinder.

It will be Observed that the axes of the tubes 25 and 26 are eccentric to the enlarged ends 23. The object of this arrangement is to permit of the rocking of the gate without imparting any longitudinal movement to the sheets of paper lying over said gato. The axis of vibration of the gate coincides with the line of contactvof the lowest sheet of the pile with the upper surface of said gate,l and therefore with the rocking of the gate said. lowest sheet is bent on that line without advancing or .moving longitudinally said sheet.

While fthe lip of vthe gate .is falling the f pump is exhausting, so as to produce a vacuum underithe free edge of the paper and to cause it to adhere closely to said lip, ythus bringing it under the grippers, which advance and grip the paper to the cylinder and hold it thereto `as the cylinder `reverses its `movement.'

The object oficausing the gate to lroc'k upward is .to raise the edges of the pile of vpapel' into an oblique direction, so that as the gate again descends the lowest sheet of paperv is more easily Withdrawn 'bysuction from vthe remaining sheets, which are held u-p -by trictiomof their edges against the fixed -wall of the box. The vertical reciprocation of the edges .of the ,sheets and the consequent friction .against the wall of the vbox tend to separate the paper and are.particularly advantageous 4for this purpose when the sheets ofI paper tend to adhere yto each other by reason ol ytheir raw edges, produced by the cutting of the sheets, interlocking with or clinging to each other. This movement of said edges against the wall serves' to disturb or break .up the interlocking or adhesion of :the sheets, so that the lowest sheet is more easily separated from the rest. l y

rReferring to Figs. i7, 18, and 19, it will be observed :that the upper surface. v.of the lip is slightly concave, as shown at 52, between the cylindrical portion and that :portion of the ilip which :contains the elongated depression 47 The object of thisis, by sucking the Ifree edge of the paper into said .concave portion of the lip, to withdraw the .edgeof the -paper from contact with the wall of the box,l

so that itcan be separated with more certainty 'from the other sheets of the Ypile vand its descent with the lip insured.

IOO

IIO

Pro-vision is :made in the following manner for diil'eren-t sizes, thicknesses, and qualities of paper: The inner .tube is slidablewithin the outer tube and is adjustably secured in various positions therein by means .of :the engagement of a pin 53 on the inner tube with one of a series of notches 54, formed .in a slot in the outer tube. On account of @the dilt'erences in the sizes and relative positions also.

of the slots 44 45 in the inner tube a longitudinal shift of the inner tube within the outer tube gives rise to different effects desirable for different kinds of paper. For instance, in Figs. 12 and 13 it will be seen that the centralA slot 44 is in communication by the corresponding port 46 with the under surface of the paper, and so also are the terminal slots 45, but the intermediate slots 45 are shut off. This gives a suction upon the paper which is suitable for fairly light weight paper of considerable width extending over all of the slots. In the next figure all of the slots are in communication by their ports. This will be desirable for a heavier grade of paper. In Fig. 15 the middle three slots are in communication, but the outer slots are shut off. This would be suitable for narrow papel'. In Fig. 16 only the middle slot of the `five is in communi cation. This would be suitable for very narrow paper or for paper in which only a small degree of suction was required.

The degree of vexhaust is also lan important factor in operating the device successfully with different grades of paper. In order to vary the degree of exhaust, the following construction is provided: 56 represents a valve closing a port 57 and having a stem 58, which slides in a bearing 59 and has on its end a nut 6() and a lock-nut 61. Upon the bearing is also screwedvan adjusting-nut 62 and a lock-nut 63, and between the twosets of nuts is interposed a spiral spring 64.y The utility of this valve appears When, for instance, orous paper is being used, in which case un ess thedegree of exhaust was suit ably reduced the suction might be so great as to draw air not onlyfrom the near side of the bottom sheet, but also through the sheet itself, and then to draw down the next sheet This is prevented by using the abovedescribed valve, for now the pressure of the external atmosphere' upon thev piston overcoming the strength of the spring said piston is forced inwardly, admitting air into the pump and raising the pressure, or, in other words, reducing the suctioni The de 'ee of maximum suction can be readily acjusted by means of the nuts and l in which a number of holesv67 are provided at a greater distance from the edge than theA rdepressions in the first modification. In

this ferm of the device the edge is'not rccesscd or serrated; but the paper extends over the edge of the lip and is drawn down over it.

In Fig. 21 is shown a further modiiication in which a large depression 68 is formed in the upper surface of the gate, this gate being thereby particularly well adapted for feeding envelops.

1. In an apparatus of the character described, in combination with the feed-box, a feeding device comprising inner and outer tubes, 'a pump connection between the pump and the inner tube, the outer tube having a lserrated extension or lip having recesses and having depressions in the upper face thereof between the recesses, and having also ports leading from the inner tube to said depressions, and the inner tube having corresponding oblong holes leading to said ports, and a' gripper having i per-iinoers registering with the recesses, su stantia ly as described.

2. `In an apparatus of the lcharacter described, in cembination with the feed-box, a

.feeding device comprising inner and outer MoRiussoN J. BARNETT.

' Witnesses:

FRANCIS -M. WRIGHT, BEssIE GORFINKEL.

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