US1159907A - Rotary duplicating-machine. - Google Patents

Description

A. B. DJCK. ROTARY DUPLICATING MACHINE.

APPLICATION FILED JULY 13. I914.

WITNESSES e1 QzwM A. B. DICK. I I ROTARY DUPLICATING MACHINE. I APPLICATION FILED JULY 13. I914- w 1,159,907. Patented Nov. 9, 1915. 3 SHEETSSHEET 2.

INVENTOR WITNESSES vBY A TTOR/VEY A. B. DICK.

ROTARY DUPLICATING MACHINE.

APPLICATION FILED JULY 13. 1914.

WITNESSES nvmvron @wbkm I Y 1244 I Br v v UNITED STATES PATENT ,UFFIQEE.

ALBERT B. DICK, LAKE FOREST, ILLINOIS, ASSIGNOR TO A. B. -DICK. COM]?ANY, OF

CHICAGO, ILLINOIS, C ORPORATI01\T OF ILLINOIS. I

RoTAIiY DUPLICATING-MACHINE.

Specification of Letters Patent.

Patented Nov. 9.; 1915.

Application filed July 13, 1914. Serial No. 850,563.

To all whom it may concern Be it known that I, ALBERT B. DICK, a citizen of the United States, residing at Lake Forest, in the-county of Lake and State of Illinois, have inventedcertain-new and useful Improvements in Rotary Duplicating-Machines, of which the following is a specification.

My invention relates to rotary duplicating machines of that class in which are employed a perforated drum mounted in suitable heads, a stencil-sheet on the periphery of the drum and means for rotating the drumand bringing the surface of the stencil upon the same in contact with the paper to be printed upon.

The object of the invention is to improve and simplify the construction of apparatus of this type and to increase its efiiciency-particularly in connection with certain features of the machine.

Among the features which I have improved in accordance with this invention are the means for stripping the paper from the drum after it has been printed upon, and the provision of means whereby the paper stops by which the forward edge of the paper is positioned relatively tothe drum when the paper is fed to the machine are .rendered adjustable laterally to coact with pressure rollers of different lengths and different widths of paper. d

Other improvements in the construction of the machine will appear from the following specification.

In carrying out the invention, I locate the paper stops adjacent the ends of the pressure roller and so mount the same that they may be moved laterally when it is desired to change the pressure roller for one of a different length. The means which I employ for stripping the paper from the drum comprise a member which is contacted by the forward edge of the paper after the printing operation and which is moved in the operation of the machine at this time away from the drum, stationary stripping arms or fingers at the same time or immediately thereafter extending between the paper and the drum to insure the complete separation of the paper from the drum during the remainder of the rotationof the latter. In the preferred form of my invention, the member referred to which moves the forward edge of the paper away from the drum comprises a strip which extends across the periphery of the drum between the two heads thereof and lies closely against the forward edge of the stencil to protect the same. This strip has portions extending rearwardly from its forward edge-and spaced apart, the stationary stripping arms extending between these spaced portions, after the paper-has passed between the drum and the pressure roller, and after the forward edge of the paper has been moved somewhat away from the drum by the movement of the member re-' ferred to. This member is mounted on arms which are pivoted to the heads of the drum and spring pressed into the normal position in which the strip lies snugly against the forward edge of the stencil. Surfaces upon these pivoted arms contact surfaces on the frame of the machine in the rotation of the drum to move the member referred to away from the drum at the proper time for stripping the paper. I also preferably provide means for rocking the levers carrying the member referred to, in case the drum is rotated in the, reverse direction, in order to prevent contact of the levers referred to or operating rollers thereon with the track or surface with which the same coact in the forward movement of the drum to move the paper stripping member away from the drum.

In order that my invention may be, more clearly understood, attention is hereby directed to the accompanying drawings-forming part of this application and embodying a preferred form of my invention.

In the drawings, Figure 1 represents a. vertical section taken on line l-1 of Fig. 2,

. Fig. 2 represents a horizontal section taken on line 2-2 of Fig. 1, Fig. 3 represents a .rear elevation of the machine and Fig. 4 is carried by arms 12 pivoted on studs 13 to the side frames. The rear ends of arms- 12 are curved downwardly and rearwardly to extend below a rod 14 Carrying cams 15 which may be rotated by handle '15 to coact with the curved extensions of arms 12 to place the pressure roller in its operative or inoperative positions. Springs 16 are connected to the lower ends of arms 12 and to a rod 17 extending between sideframes of the ma chine to pressthe pressure roller upwardly to coact with the drum in the printing op a nose on the end of lever below the roller partly in front of rod 21.

19 and a similar surface on the correspond" ing lever 20 at the opposite end of the machine contacting the upper surfaces of arms 12 to depress the same when cam 18 engages roller 19, in the well known, manner.

' Sheets of paper are fed to the machine over the usual feedboard extension 22 pivoted on rod 23 and the plate 24 on which are mounted the guides 25 which may be adjusted laterally and clamped'in positionto engage the side edges of the sheet by means of the thumb nuts and bolts 26 extending through slots 27 .on the plate 24. When the paper is thus fed to the machine, its forward edges contact the paper stops 28 positioned closely adjacent to the ends of pressure roller 10; Stops 28 consist of the upwardly bent ends of strips 29, the lower and opposite ends of which are enlarged as shown at 30 in Figs. 1 and 2, which enlarged portions 30 are slidably mounted upon a member 31 extending transversely of the' machine underneath plate 24 and pivotally mounted upon studs 44 mounted in lugs 45, said member 31 extending beneath and Member 31 is provided with a longitudinal slotor slots 32 in its lower surface through which extend clamping screws having nuts on their upper ends and knurled heads 33 integral with their lower ends below the enlarged portions 30 of arms 29 whereby the arms may be adjusted laterally and secured in position with paper stops 28 immediately adjacent each end of pressure roller 10. When it is desired to operate upon a different width of paper, pressure roller 10 may be removed since the bearings 34 for the ends of the shaft of the same in arms 12 are open at the top as shown in Fig. 2 so that the shaft 11 may be removed from and replaced in the same by direct pressure. When a new roller has been substituted, the position of paper stops 28'and of guides 25 may be adjusted accordingly.

The rocking movement of paper stops 28 into position to coact with the forward edge of the paper at the time when the paper is fed into the machine is accomplished by the coaction of a cam 35 on one of the heads of the drum with a roller 36 mounted on one end of a lever 37 mounted on a stud 39, the

other end of the lever having secured thereto a spring 40, the lower end of which is secured to the side frame to normally raise the opposite or forward end of the lever. A vertical link41 is-pivotally connected to the forward end of lever 37 and at its lower end is pivotally connected to one end of a lever 42 pivoted intermediate its ends on rod 14,

the opposite end of lever 42 having pivotally connected thereto a vertical link.43, the upper end of which is pivotally connected to a lug extending from the adjacent end of the rear edge of member 31 to which the paper studs are adj ustably secured as stated. Member 31 is pivotally mounted adjacent its forwardedge to the under side of plate 24 by means of short studs 44 mountedin lugs 45 on member 31 and also in lugs secured to or integral with plate 24. Cam 35 which coacts with roller 36 is so positioned, that paper stops 28 are raised by the rocking of ing surface and termination of cam35 permit spring 40,, secured to lever 37, to cause the paper stops to recede below the upper 1 surface of the pressure roller, and remain depressed until after the stencil bearing segment of the drum has passed over the pressure roller.

The stencil is applied to the drum in the usual manner as shown in the drawings, the forward edge of the. same being secured to the button bar 46. The member 47, which constitutes the movable member of the paper stripping mechanism previously referred to comprises a, metallic strip 48 extending across the face of the drum and normally lying snugly against the forward edge of the stencil to protect the same from tearing or other injury.

' Depressions are formed in theinner face of strip 48 to receive the heads of the buttons or fastening means by which the stencil is secured to bar 46. Member 47 is carriedby arms 49 and 50 which are pivoted on studs mounted on the outer faces 7 of the heads of the drumat 51. and 52 respectively, springs 53 coiled around" studs 51 and 52 and having their ends securedto levers 49 and 50 and to pins 54 secured to the heads of the drum serving to normally press member 47 against the face of the drum so that strip 48 will lie against and protect the forward edge of the stencil. The tail of lever 50 carries a roller 55 which in the forward or clockwise rotation of the drum referring to Fig. 1 contacts a track 56 consisting of a strip of metal secured to the horizontal feed plate 24 and extending rearwardly from the rear edge of the same. The same construction may be used, if desired, at the opposite side of the machine. When roller or rollers 55 ride over surface or surfaces 56, the levers 49 and 50 are rocked about their pivots to move member 47 away from the surface of the drum in a direction nearly radial of the drum. and this movement is timed to occur immediately after the paper has passed between the drum and the pressure roller.

The effect of this movement is to move the forward edge of the paper, which lies against member 47 away from the surface of the drum to which it might otherwise stick. Member 47 is provided with a number of portions 56 extending rearwardly from the strip 48 to which they are secured and formed with the same curvature as the drum and spaced apart as is indicated in the drawings. Stripping arms or fingers 57 .are secured to rod 17 and extend rearwardly and downwardly, being provided on their lower ends with the usual star wheels 58. When the drum'is rotated, stripping arms 57 extend through the spaces between the portions 56 of member 47 at the time when the latter has just begun to move away from' the drum, accordingly the forward edge of the paper is separated from the drum by the movement of member 47 described. The stripping arms 57 will'have their lower ends positioned between the drum and the paper and will complete the stripping operation commenced by the movement of member 47. As the paper is stripped from the drum it'fallsupon guides 59 which are adjustably mounted upon a rod 60 ex tending between the side frames of the machine. Guides 59 are preferably provided with bosses 61 slidably mounted on rod 60, so that guides 59 may be adjusted laterally to accommodate paper of different widths, thumb screws 62 serving to secure the guides in adjusted position.

Means "are provided to prevent roller 55 contacting the end of track 56 in case the drum should be rotated in a reverse direction, and thereby stopping .the machine.

The form of this device which I have illustrated comprises a flange 63 secured to one end of strip 48 on the outer side of the ad jacent head of the drum, this flange extending at aslight an le to the tangent to the drum as illustrate If the drum should be rotated in a reverse direction as indicated in Fig. 4, the surface of flange 63 will contact a roller 64 carried by an arm or otherwise secured to the side frame of the machine,

the result of roller 64 riding over surface 63 belng to move member 47 away from the drum and to rock arms 49 and 50 about their v pivots sufiiciently to enable roller or rollers to clear the tracks 56. Member 47 is provided at its forward edge with a hand piece 65 whereby member 47 may readily be swung away from the drum when it is debe over ridden by lever 50 when member 47 is thus moved away from the drum by hand piece 65, the friction between lever 50 and strip 66 being suflicient to hold member 47 away from the drum, a stop pin 67 serving to prevent arm 50 being moved too far in this direction. During the normal operation of the machine, the lever is not moved sufficiently far by the coaction of roller 55 and track 56 to cause the lever 50 to ride upon piece 66 and member 47, when the drum is rotating in a forward direction, remains in contact with the drum at all times except when roller 55 is in contact with track 56.

Having now particularly described my invention, what I claim and desire to protect by Letters Patent is as follows j 1. In a rotary duplicating machine, the

combination with a stencil-carrying drum,

of means for-positioning a sheet of paper with relation to said drum, means for secur ing aprint on'the paper from the stencil, movable means carried by said drum and adapted to lie against the periphery thereof, in position to be contacted by the forward edge of the paper, and automatic means for moving said last-named means away from the drum, after the printing operation each revolution of said drum, substantially as set forth.

2. In a rotary duplicating machine, the combination with a stencil-carrying drum, of means for positioning a sheet of paper with relation to said drum, means for securing a print on the paper from the stencil, a member pivotally connected to said drum and adapted to lie against the periphery thereof, in position to be contacted by the paper on the drum, means for holding said member against the drum, and means coacting with said member each revolution of said drum for moving said member away from the drum, after each printing operation, substantially as set forth.

3. In a rotary duplicating machine, the

combination with a stencil-carrying drum,

of a pressure roller, a transverse strip mov-' means formoving said strip away from the drum, after the printing operation each revolut ion of said drum, and stripping arms positioned to extend between the paper and v the drum at the time said Qmember moves away from the drum, substantially as set forth.

4. In a rotary duplicating machine, the

vdrum after said member has "passed beyond said pressure roller, and stripping arms positioned to extend between the spaced portions of said memberwhen the latter is moved by said moving means, into position to strip the paper from said drum, substantially as set forth.

I 5. In a rotary duplicating machine, the combination with. a stencil-carrying drum,

. of a pressure roller, and movable paperstripping means comprising a member adapted to be interposed between the drumand forward edgeof a sheet of paper after the sheet haspassed between the drum and the pressure roller, automatic means for positively moving said member at such time each revolution of said drum, and the for- -ward edge of the paper therewith, away from the drum in a substantially radial di-' rection, and fixed stripping arms positioned to extend between the paper and the drum at such time, substantially asset forth.

. 6. In a rotary duplicating machine, the combination with a stencil-carrying drum, of means for positioning a'sheet of paper with relation to saididru'm, means for securing a print on the paper from the stencil, a

-member extending across the face of said drum, in position to have the paper lie against the same'after the printing operation, levers pivoted to said drum, carrying said member, spring means for normally holding said member against the face of the idrum,'and means adapted to be contacted by one of, said levers in the rotation of the drum, after the printing operation, to rock said member away from the drum, substantially as set forth.

7. In a rotary duplicating machine, the combination with a stencil-carrying drum, of a paper stripping member extending across the faceof said drum, arms pivoted to said drum, carrying said member, 'fixed means contacted by one of said armsin the forward rotation of'the drum, to rock said member away from the drum, and means contacted by one of said arms in the reverse rotation of said drum, to rock said member to cause said first named arm to clear-said fixed means, in continued reverse rotation of the drum, substantially as set forth.

8. In a rotary duplicating machine, the

combination-with a rotary stencil-carrying drum of a pressure roller adapted to coact therewith, a frame, side guides for the paper adjustably secured to said frame, pivoted paper stops, adapted to be contacted by the forward edge of paper fed to the machine, means on which said stops are slidably mounted, extending transversely of the machine, means for securing said stops in adjusted position to said means, paper guides for receiving the paper after its passage through the machine, transversely extending means on which said guides are slidably mounted, and means for securing said guides thereon in adjusted position, substantially as set forth This specification signed and witnesses this 8th day of July, 1914.

, ALBERT B. DICK.

Witnesses: y

W. A. WATERBURY, W, G. ARNOLD.

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