US 2233895 A
Description (OCR text may contain errors)
March 4, 1941. MESTRE 2,2 33,895
DUPLIGATING MACHINE Filed Aug. 14, 1959 2 Sheeis-Sheet 1 r v A. m 1
INVENTOR L U/J N55 TRE ATTORNEY March 4, 1941. MESTRE 2,2 33,895
DUPLICATING MACHINE Filed Aug. 14, 1959 2 Sheets-Sheet 2 7 IIIIIIIII INVENTOR L UAS N55 TRE ATTORNEY Patented Mar. 4, 1941 UNITED STATES DUPLICATIN G MACHINE Luis Mestre, New York, N. Y., assignor to Style 'Duplicator Corporation, New York, N. Y., a corporation of Delaware Application August 14, 1939, Serial No. 290,103
The invention herein described relates to a duplicating machine of the rotary type in which a perforated cylinder is employed, which cylinder is adapted to support a stencil sheet on its periphery and including .means for rotating the cylinder to bring the surface of the stencil into contact with sheets of paper which are successively-fed to the cylinder and between it and a pressure roll.
The invention has for its object to improve the control of the sheets as they are successively fed to the cylinder and pressure roll and to the accurate positioning of the sheets transversely of the cylinder.
Among the features by which these objects are attained, may be mentioned, the side guides which are not only independently adjustable to provide for sheets of different widths, but both guides may be moved simultaneously to position the sheets at any desired location transversely of the cylinder. The usual rubber faced edge plates which control the paper as it is fed to the cylinderare in the present invention carried by the guides but are independently adjustable by a parallel motion, thereby providing better control of each sheet as it is being fed. An end plate enables the sheets to be accurately aligned at their top edges and while so aligned the entire stack of sheets may be moved laterally to any desired location. Before the sheets are actually fed to the cylinder and pressure roll, the end plate is moved to a position where it does not interfere with the feeding of the sheets but serves as a means to guide them between the cylinder and pressure roll. Means are also provided for preventing the cylinder from backward rotation and this preventing means is so related to the sheet feeding means that it is operative in any adjusted position of the latter.
The various features and advantages will be better understood by the following detailed description and claims when taken in connection with the accompanying drawingsin which:
Figure 1 is a perspective view of the duplicator showing its general construction;
' Figure 2 is a section takenon the line 22 of Figure 1 and looking in the direction of the arrows; the figure being on a reduced scale;
Figure 3 is a detail of the mechanism for preventing backward rotation of the cylinder;
Figure 4 is a view of a portion of the machine viewed from underneath to show the connections whereby the side guides are moved;
Figure 5 is a part sectional, part elevational view showing how the rubber faced edge plates are adjustable;
Figure 6 is a view of the same parts, but from a different viewpoint;
Figure 7 is a detail showing the adjustment for the feed; and
Figure 8 is a section on the line 8-8 of Figure 7.
Referring to the drawings, Figures 1 and 2, the operative parts of the machine are supported by side frames each of which comprises a base member 2 having a fiat upper face 4 and sloping side faces 5. Horizontal and vertical cross members 6 and 1 give the required rigidity to the frame and the two frames are tied together by a U- shaped bar 8, a portion of which is shown in Figure '1. Supported by the side frames is a shaft 9 carrying a perforated stencil cylinder I0 adapted to be rotated by a handle H secured to its right hand end as shown in Figure 1. A pressure roller I2 carries end bearings l3, Figure 4, which bearings seat in notches in side plates it, one of which plates is shown in Figure 2, the other plate being on the opposite side of the machine and being of like construction. The frame formed by these side plates pivots about a shaft I6, which shaft is fastened to the frame. The end of the shaft adjacent the right hand frame plate M, as viewed in Figure 2, is provided with an arm l8 to which is attached one end of a spring 20. The other end of the spring is connected to a member 2| supported in a bracket 22 projecting from the right hand side frame 5 and a knurled knob 23 enables the tension of the spring 20 to be varied thereby holding the pressure roller against the surface of the cylinder with the desired degree of pressure.
It is to be understood that the frame comprising the side pieces [4, shaft l6 .and arm is, pivots about the point Hi. When it is desired to release the pressure roller from the cylinder, a knob 24, Figure 1 secured to shaft 25, Figure 2, is turned in'a direction to cause the cam member 26 secured to shaft to be moved to a vertical position at which time it engages the frame and moves it down so that the pressure roller I 2 is disengaged from the cylinder. A stop 28 normally limits the movement of the frame under tension of the spring 20 and this stop may be adjusted.
For supporting the sheets of paper to be fed to the cylinder and pressure roll, a sheet delivery tray indicated generally by the reference character 30 is provided. Transverse slots 32 serve as guideways for the side guides 33 for aligning the sheets along their side edges.
for the top edges of the sheets. The position of the plate 34, as shown in Figure 2, is the position to which it has been moved when it is desired to feed the sheets to the cylinder, but when the shaft 34 is rocked, as it may be through manipulation of the knob 38, Figure 1, the plate 34 is moved to a vertical position and the sheets are stacked against it.
The guides 33 are adjustable laterally to accommodate sheets of different widths and for this purpose levers 38 and 38 are provided. These levers are pivoted at 48 to the base of the machine as shown in Figure 4. Each lever is slotted near its upper end as shown in connection with the lever 38, the lever 38 being broken away at its upper part. A screw 4| passes loosely through each slot and into a block 42, each block being secured to a guide 33. The arm 39 is provided with a projecting lug 44 which is interiorly threaded for engagement with a screw thread 45 formed on a sleeve supported at 48 and by the side wall of the casing through which it passes. Its end is provided with a knob 48 by which the screw 45 may be rotated.
The arm 38 is likewise provided with a lug 44 with which engages a screw 48. The shank of this screw passes through the sleeve upon which the threads 45 are cut and it is also supported midway of its length at 50. The right hand end of the shank of the screw 48 is provided with a knob 52 by which the screw may be turned. The blocks 42 are each secured to one of the guides 33, therefore, when either of the knobs 48 or 52 knobs 48' and 52, however, are not only concen-' trically mounted, but are so close together and are of such diameter that both may conveniently be manipulated together. Under these circumstances, therefore, the guides 33 will move as one and therefore move the sheets located between them to any position transversely of the cylinder. This feature makes it possible to change the width of the margin on the printed sheets with convenience and accuracy, since the sheets are aligned by the guides 33 and at the same time the aligning plate 34 serves to align the ends of the sheets. After the stack of sheets are ready to be fed, the plate 34 is moved to the position shown in Figure 2 and serves as a means to guide the sheets between the cylinder and pressure roll. Springs 53 may be provided to take up any lost motion of the screw threads.
The sheets are fed one at a time by feed rollers 54 carried by a frame 55 which is connected by an arm 55 to'another frame 5'l having side arm 58 pivoted at 68, Figure 2.
The frame 51 is rocked about the pivot 88 by a mechanism which will immediately be described, but before doing so its is desirable to point out that the feed rollers 54 are connected to their shaft by a one way clutch of any known construction whereby the rollers roll over the sheet with ease during the backward or nonfeeding movement of the frame 51 but do not rotate on their axis when moved in the feeding direction. The rollers 54 being rubber faced, at this time exert sufllcient friction on the sheet to feed it to the cylinder. This construction of the feed rollers in connection with the plate 34 permits the backward movement of the feeding frame and rollers 54 without disturbing the align- A plate 34 piv--- oted at 35, Figure 2, serves as an aligning plate side of the machine, as viewed in Figure 2, there is a link 82 connected at "to the right hand arm 58. The other end of thelink 82 is connected to a vertical link 64 pivoted at to a lug extending from cross member I, Figure 2. In order to vibrate the frame 51 to cause the sheets of paper to be successively fed to the cylinder, the link 84 is provided with a roller 88 engaging a circular groove in an eccentric l8. A plate I8 is connected to the eccentric, which plate is provided with an arcuate slot 'I-l adapted to beengaged by a pin 12 carried by the cylinder. as clearly shown in Figures 7 and 8. A winged nut 14 engages the end of the screw 12, to secure the plate 18 in any position of adjustment permitted by the slot II to thereby vary the throw of the link 84 by the eccentric 58. I c
To prevent the cylinder ID from rotating backwardly to any harmful extent, the shaft 8 has secured to it a grooved roller 18, Figure 8. A pawl 18 pivoted at 18 to cross member 8 is adapted to engage the groove in the roller 18.
Referring now to Figure 3, the handle, as
1 viewed in this figure, is adapted to be rotated in a clockwise direction. When so moved, the pawl 18 offers substantially no resistance to such movement. If, however, attempt is made to rotate the handle in reverse direction, then due to the action of the spring 88, the pawl would tend to movein a clockwise direction, Figure 3, but its length is such that it then tends to jam in the notch in the roller'lB and prevent any substantial backward movement of the handle.
It is to be observed that the action of the pawl I8 will prevent backward rotation of the handle with any adjustment of the plate 10 so that the feeding of the paper may start at different places during the rotation of the handle'but the backward rotation is prevented regardless of the adjustment of the feed.
The side guides for the paper 33 are supplemented by rubber faced edge plates 82, Figures 5 and 6. While edge plates of this sort have heretofore been proposed, all of these as far as I am aware, are either separate from the guides 33 or if attached to them, they have been pivoted so that they move in an are when adjusted. This method of mounting the edge plates is not desirable because the rubber does not bear equally throughout its length against the edge of asheet of paper as it is fedv to the machine. I propose to mount these rubber faced edge plates so that they are always adjusted in parallelism and to this end the guides 33 are cut away and a housing 84, Figures 5 and 6 permits sufllcient movement of the plates 82 to give the necessary pressure against the side edges of the sheets as they are fed. The housing 84 is centrally bored and slotted and a screw 85 secured to each plate 82, passes through a collar 86 which is interiorly screw-threaded. 'A knurled knob 88 serves to rotate the collar 88 and thereby move the plate 82 it having been fully described and claimed in my application iiled of even date herewith.
What I claim is:
1. In a duplicating machine, the combination with a stencil cylinder and a pressure roll; of a sheet delivery tray from which sheets are fed to the cylinder and roll, side guides for aligning the sheets, a rubber faced edge plate mounted on each guide, means for moving said edge plates relatively to said guides and parallel to each other to different degrees to effect fine adjustment between said guides and plates, and means located at one side of the machine for moving both guides and edge plates together transversely of the tray while maintaining the relative fine adjustment of the guides and edge plates.
2. In a duplicating machine, the combination with a stencil cylinder and a pressure roll; of a sheet delivery tray from which sheets are fed to the cylinder and roll, side guides for aligning the shees, means for moving each guide transversely of the tray independently of the other guide. said hand of the operator to thereby move both guides simultaneously to the same degree.
3. In a duplicating machine, the combination with a stencil cylinder and a pressure roll; of a. sheet delivery tray from which sheets are fed to the cylinder and roll, side guides for aligning the sheets, means including a screw one for each guide for moving a guide transversely of the trays independently of the other guide, one of said screws being housed within the other, and means located at one side of the machine for moving both screws.
4. In a duplicating machine, the combination with a casing and a stencil cylinder supported thereby; of a sheet delivery tray from which sheets are fed to the cylinder, side guides I01 aligning the sheets, means including a screw one for each guide for moving said guide transversely of the tray independently of the other guide, one of said screws being housed within the other screw and both screws having their ends extending outside of the machine casing, a knob connected to the end of each screw, said knobs being of diflerent sizes and spaces closely together whereby each knob may separately be manipulated or both manipulated together by one hand of the operator.
5 In a duplication machine, the combination with a stencil cylinder and a pressure roll; of a sheet delivery tray from which sheets are fed to the cylinder and roll, side guides for aligning the sheets, said guides having a cut-out portion intermediate their ends, a housing secured to each guide and bridging said cut-out portion, the outer wall of said housing being parallel to the guide to which the housing is secured, a rubber faced edge plate mounted in each housing and means cooperating with each housing for moving each edge plate relatively to said guides and parallel to each other to different degrees to effect fine adjustment between said guides and plates.
6. In a duplication machine having a printing cylinder and a pressure roll; a sheet delivery tray from which sheets are fed to the cylinder and roll, side guides for aligning the sheets, said guides having a cut-out portion intermediate their ends, a housing secured to each guide and bridging said cut-out portion, the outer wall of said housing being parallel to the guide to which the housing is secured, a rubber faced edge plate mounted in each housing and means cooperating with each housing for moving each edge plate relatively to said guides and parallel to each other to different degrees to effect fine adjustment between said guides and plates.