US2389848A - Paper handling mechanism for duplicating machines - Google Patents

Description

NGV. 27, 1945. J. GIBSON EI'AL 2,389,848

PAPER HANDLING MECHANISM FOR DUPLICATING MACHINES INVENTORS JZzr-nes L Gzbson- Filed Dec. 18, '1941 4 Sheets-Sheet l B Eric ZUPetaTSOn- Nova 27, 1945.

4 Sheets-Sheet 2 Filed Dec. 18 1941 fir l l l l hn HU 4.

LIr vi F Eric m Peter-60g.

Nov. 27, 1945. I J. 1.; Gl BSON ETAL 2,389,848

PAPER HANDLING MECHANISM FOR DUPLICATING MACHINES File d Deo. 18, 1941 4 Sheets-Sheet a L JZzr rzes L- Gzbson- BY Er zc CU- Petersonawon igfiuyi fim Nov. 27, 1945. J. GIBSON ETAL 2,389,848

PAPER HANDLING MECHANISM FOR DUPLIUATING MACHINES Filed Dec. 18, 1941 4 Sheeis-Sheet 4 97 Zr ,5 96 6Q 60 79 31 Jig 81 a] B0 64 66 65 r a a a .2 55 a a a \.5:3B 7g INVENTORS. @mea L- Gzbson.

. Peierson.

Patented Nov. 27, 1945 PAPER HANDLING MECHANISM F DUPLICATING MACHINE James L. Gibson, Chicago, and Eric W. Peterson,

Glen Ellyn, 11]., asslgnors to Ditto, Incorporated, Chicago, 111., a corporation of West Virgin a Application December 18, 1941, Serial No. 423,480

2 Claims. (Cl. 101-132) This invention relates to paper handling means for use in connection with duplicating machines for taking sheets or cards in succession from the drum of such a machine and delivering them to a tray or other suitable receptacle. It is one of the objects of our invention to provide an improved arrangement of paper handling mechanism adapted for use in place of the mechanism shown by the prior Patent No. 2,175,667 to Marchev and Morrison, dated October 10, 1939.

In a machine of this type, and particularly when motor driven, it is important that the cards or sheets being printed shall have as smooth and easy a path of movement as possible for insuring that they shall not be caught and held from orderly forward movement, and that the forwarding means be arranged so as to give the card or sheet a quick sharp final movement clear of the forwarding means and into the tray. In an arrangement of this kind, when the forward movement of a card or sheet is stopped by being brought inadvertently into contact with a portion of the means by which the path is defined, the cards or sheets are likely to pile up and become wedged in position so as to make their removal diiiicult and thus to cut down substantially the normal usefulness of the duplicating machine.

In our improved arrangement, an endless belt conveyor is provided for taking the copy sheets from the drum of the duplicating machine and delivering such sheets to a receiving tray at the outer end -of the belt, such belt being driven at the same surface speed as that of the drum and its cooperating platen roller. Frictionally-acting means is provided at the delivery end of the belt for speeding up the sheets or cards at the end of their movement by the belt so as to insure that the sheets or cards shall be thrown clear of the forwarding means. Other frictionally-acting means is provided also in position for engaging the sheets adjustably mounting the receiving tray in position and for adjusting the angular position of the tray as desired.

It is another object of this invention to improve devices of this type in sundry details hereinafter pointed out. The preferred means by which the several objects have been attained are illustrated in the accompanying drawings, in which-- Fig. 1 is a central vertical sectional view through a duplicating machine equipped with our improvements, being taken substantially at the line l-I of Fig. 2, with the end portions of the machine broken away;

Fig. 2 is a top plan shown in Fig. 1;

Fig. 3 is a sectional view taken substantially at the line 3-3 of Fig. 1;

Fig. 4 is a vertical sectional view taken substantially at the line 4-4 of Fig. 3;

Fig. 5 is a vertical sectional view taken substantially at the line 5-5 of Fig. 1;

Fig. 6 is a vertical sectional view taken subview of the machine as stantially at the line 6-6 of Fig. 2; and

or cards and pressing them firmly into contact I with the belt so as to prevent effective action by said speeding-up means on a sheet or card until such sheet or card has advanced beyond the drum and the master sheet thereon. The speeding-up effect is thus delayed until there is no danger that such sheet or card shall be whipped into contact with the master sheet so as to blur the copy or damage the master.

It is one of the objects of this invention to provide an improved arrangement of mounting and driving means for the delivery belt, together with a convenient arrangement of means for tightening the belt. Improved means is also provided for Fig. 7 is a view of a fragmentary portion of the machine as seen at the line '|-'l in Fig. 6.

Referring now to the several figures of the drawings in which corresponding parts are indicated by the same reference characters, l0 and I l indicate sheet metal standards at opposite sides of a duplicating machine embodying our improvements, said standards being firmly connected together by crossbar portions l2 and I3, also of sheet metal, as is best shown in Fig. 1. Between the standards I 0 and II, a heavy shaft I4 is rotatably mounted in position for supporting, a drum l5, which is provided with a plurality of grippers l6, for detachably mounting a master so as to rotate with the gear, in position to be engaged by a pawl 28 pivotally mounted on a heavy plate 29 movable with the drum. Means comprising a latch member 30 pivotally mounted by means of a cross shaft 3| is adapted when moved inwardly to operative position as shown in Fig. 1 to engage the pawl 28 for releasing it from the ratchet wheel 21 and for stopping the drum [5 in position for receiving a master sheet thereon. Means comprising a latch member 32 pivotally mounted by means of a cross shaft 33 is adapted alternatively to be moved inwardly for engaging the pawl 26 for releasing the pawl from the. ratchet'wheel 21 so as to stop the drum l5 in position for having a copy sheet fed into impression relationship with the master sheet on the drum. The shafts 3| and 33 are operatively connected together by means comprising a lihk 33a, said shaft 33 having a handle or lever 33b mounted thereon for operating the latches 30 and 32. This construction is preferably of the type shown by prior Letters Patent to Hernlund No. 2,117,165, granted May 10; 1938, and forms in and of itself no part of the present invention. It is believed accordingly to be unnecessary to describe this mechanism and its operation in detail.

For pressing copy sheets successively against the master sheet on the drum, a platen roller 34 is provided, rotatably mounted between the arms of a yoke 35 pivotally, mounted on the framework below the drum. An arm 36 extends downwardly from the yoke into engagement with a control rod 31 connected at its rear end with an eccentric 38, a coiled spring 39 on said rod bearing against said arm for holding it yieldingly in its rearmost 'ad- Justed position. A short distance to the rear of the platen roller 34, forwarding rollers 46 and 4| are rotatably mounted in cooperative relation to each other for forwarding copy sheets into position between the drum l5 and the platen roller 4 34. Moistening means of any approved type is provided for applying afllm of solvent to the upper forwarding roller 40 for transfer to the top face of a copy sheet fed to the drum, such moistening means in the arrangement shown comprising an absorbent pad 42 bearing on the rear face of the roller 40 and a. pipe 43 through which a supply of solvent is fed from any suitable source.

A table or tray 44 is provided to the rear of the forwarding rollers for supporting a pile of copy sheets 45 to be fed one at a time between said rollers 40 and 4!. This means also is substantially in accordance with the showing of said prior Hernlund Patent No. 2,117,165.

Coming now to the improved arrangement by which our objects have been attained, 46 and 41 indicate heavy frame plates at opposite sides of the machine fixedly mounted in position in inwardly spaced relation to the standards l6 and H, as is best shown in Fig. 3'. At their rear ends, the plates are supported by headed pins 46 engaging notches 45 in the plates, while the front end portions of the plates are secured by machine screws 56 taking into lugs 5| extending inwardly from the standards I and It. At their forward end portions the plates 46 and 41 support a roller comprising a plurality of roller sections 52 (see Fig. such roller sections being in spaced relation to each other transversely of the machine for supporting the front end portions of endless belts 53. In the spaces between adjacent roller sections 52, rollers 54 of increased diametrical sire are mounted in position so as to rotate with the roller sections 52. At their rear end portions, undemeath the drum II, a roller is rotatably mounted in position, such roller comprising roller sections 55 which support the rear end portions of the endless belts 53. In the construction illustrated, the roller sections 55 are mounted in position by means of a shaft'56 journaled in slide blocks 51 slidably mounted in notches 56 in the rear edge portions of the plates 46 and 41, as is best shown in Figs. 1 and 6. As is clearly shown in Fig. 3, the plates 46 and 41 are provided with lugs 53 in which set screws 63 are secured by means of screw-threads bearing at their ends against the bearing blocks 51 for tightening the ,belts 53, as will be readily understood.

In the construction illustrated, the side plates 46 and 41 are rigidly connected together by transversely extending channel bars 6| and 62 by which a very strong and rigid construction is assured for supporting a tray 63 in position for receiving copy sheets from the belts 53 as hereinafter described. As is best shown in Fig. 5, the side plate portions 64 of the tray 63 are pivotally connected with the forward ends of the plates 46 and 41 by mean of rivets 65, the side plates of the tray being provided with notches 66 therein as shown in Fig. 6 in position to have releasable engagement with the rivets 65. The angular position of the tray 63 with respect to the duplicating machine is controlled by a polygonal plate 61 operatively mounted in position on the bottom face of the channel 82, as is best shown in Figs. 6 and 7. The plate 61 i mounted in position so as to be rotatable by means of a head 68 positioned immediately below the channel 62, as is clearly shown in Fig. 6. The plate 61 is arranged in 'position for engaging the end portion of the tray 63 so as to hold the engaged portion of the tray in differentially spaced relation with respect to the channel 62. The arrangement is such that the pressure of the tray upon the plate 61 serves to hold such plate 61 in the adjusted position in which it is placed so as to hold the tray in variable angular position vertically.

Means is provided for driving the belts 53 at the same surface speed a that of the drum l5. This means comprises a pinion 69 meshing with the pinion 25 (see Fig. 6), such pinion 69 meshing in turn with a pinion 10 fixedly connected with a pulley 1| which is connected by means of a belt 12 with a pulley 13 rotatable with the roller sections 52 (see Figs. 3 and 5). For tightening the belt 12, a roller 14 is'provided carried by an arm 15 pivotally mounted in position, the arm 15 being normally drawn downwardly in counterclockwise direction in Fig. 6 by a spring 16 connected with said arm (see Fig. 6)

Means is provided in engagement with the top plies of the belts 53 for holding copy sheets from slipping with respect to such belts as the sheets are carried forwardly and upwardly thereby. This means comprises a plurality of rollers 11 rotatably mounted in position by means of a cross shaft 16 journaled in suitable bearings in the side plates 46 and 41, a is clearly shown in Fig. 3. The rollers 11 are knurled on their peripheries so as to have a good frictional grip on the face of a copy sheet moving forwardly on the belts 53. The shaft 18 is located in such position'as to cause the knurled rollers 11 to hold the top plies of the belt 53 in lowered position with respect to the supporting rollers 52 and so as to hold the opposite end portions of the top plies of the belt in angled relation to each other. As a result of this arrangement, the operation of tightening the belts 53 by an adjustment of the set screw serves to increase the pressure of the belts upwardly upon the knurled rollers 11.

At the forward end of the conveyor comprising the belts 53, a shaft 19 is rotatably mounted in position between pivotally mounted arms 80, as is best shown in Fig. 1. The shaft 19 is provided with thin knurled rollers 8| in spaced relation therealong in position to press downwardly upon the rollers 54 which are interposed between the belts 53.

In the operation of the machine, with the drum l5 rotating so as to deliver copy sheet one at a time between the drum and the platen roller 34' into position upon the belts 53, such copy sheets are carried forwardly and upwardly'by the belts, the sheets being pressed firmly against the belts by the knurled rollers TI so asto be held firmly against slippage with respect to the belts; When the sheets reach the forward ends of the belts 53,

the sheets are deflected upwardly so as to passbetween the rollers 54 and 8| and to cause such rollers to apply a forward pull on the sheets for speeding up their movement. This result is brought about by reason of the fact that the rollers 54 are of greater diametrical size than that of the rollers 52 whereby the rollers 54 have a substantially increased surface speed as compared with that of the engaged portions of the belts 53 at that point. rollers 54 and 8| upon the sheets is however'considerably less than the grip of the belts 53 and the rollers 11 on the sheets so that the rollers 54 i are caused to slip with respect to the engaged sheet so long as such sheet is in engagement also with the roller The arrangement is such that the copy sheets-continue at their normal speed of forward movement regardless of the pull of the rollers 54 and 8| thereon until the sheet passes out of engagement with the roller Tl, whereupon the sheet is immediately moved for- The frictional grip of the wardly at increased speed by the rollers 54 and 8|.

The increased speed of movement of the sheets as the reareedge ofthe sheet approaches the forward end of the endless belt conveyor assures that the sheet shall be thrown clear of the conveyor into the desired position in the tray 63. Inasmuch as the rollers 8| are driven only by frictional engagement with the copy sheets, it will be understood that there is not ordinarily any slip- Page between the rollers 8| and the sheets even when the rollers 54 are slipping with respect to the sheets immediately below. The printed face of the copy sheet is thus preservedunimpaired, the slipping of the rollers 54 being confined to the back faces of the sheets.

In the arrangement shown, a hand wheel 82 is provided, operatively connected with the drum scribed, the invention is not to be limited to such arrangement except so far as the claims may be so limited, it being understood that changes might well be made in the construction without departing from the invention.

We claim:

1. In a paper handling mechanism for a duplieating machine having a drum at the lower portion of which copy sheets are released as the drum rotates, the combination of an endless belt conveyor in position for receiving sheets thereon from the drum, means for moving said conveyor at substantially the same surface speed as that of the drum for carryingsaid sheets forwardly and upwardly, a tray pivotaliy mounted on a transversely positioned axis at the front end portion of said conveyor in position to receive sheets from the conveyor, and means for holding said tray in a plurality of different angular positions comprising a polygonal member pivotally mounted in position for spacing a portion of the tray at difi'erential distances from a portion of the framework and arranged so as normally to be held in adiusted position by the pressure of the tray thereon. Q

v 2. In a paper handling mech'anism for a duplicating machine having a drum at the lower portion of which copy sheets are released as the drum rotates, the combination of an endless belt conveyor in position. for receiving sheets thereon from the drum, means for moving said conveyor at substantially the same surface speed as that of the drum for carrying said sheets forwardly and upwardly, a receptacle at the front end portion of said conveyor in position to receive sheets therein from the conveyor, rollers rotatably mounted on the axis about which the forward end portion of the conveyor is supported and driven by the conveyor at a substantially higher surface speed than that of the conveyor adapted by engagement with sheets forwarded by the conspect to the drum. 7 H i;

JAIWES L. GIBSON?" ER'IK'J w. PETERSON.

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