US1176770A - Sheet-feeding machine. - Google Patents

Description

L. MIDDLEDITCII.

SHEET FEEDING MACHINE.

APPLICATION FILED JULY l22 1913. 1,176,770, Patented Mar. 28,1916.

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L. MIDDLEDITCH. SHEET FEEDING'MACHINE. APPLICATION FILED JULY 22.1913.

. Patented Mar. 28,1916.

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A TTOH/VEY L. MIDDLEDITCH.

SHEET FEEDING MACHINE.

APPLICATION FILED luLY 22. 1913.

Patented Mar. 28, 1916.

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L. MIDDLEDITCH.

SHEET FEEDING MACHINE.

APPLICATION FILED IuLY 22, I9Ia.

E. l 76,7?!0. .Patented Mar. 28, 1916.

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A TTOR/VEY LYlld-IAN MIDDLEDITCH. OF NEW YORK, N. Y. I

SHEET-FEEDING MAGIE-HNE.

Application led July 22, 1h13.

To all 'whom it may concern Be it known that I, LYMAN MIDDLEDITCH, a citizen of the United States, and a. resident of New York city, in the county of N ew York and State of New York, have invented certain new and useful Improvements in Sheet-Feeding Machines, of which the followingis a specification.

The present invention relates to sheet feeding machines, and has for its main object the production of efficient and simple slow-down, registeringand detector devices.

One feature ofthe invention resides in a slow-down device for retarding the speed at which the sheets are traveling at the time when they are being registered. The slowdown means is held in contact with the sheet in such a way that it is capableof exerting a relatively7 great force in a direction opposite to that of the direction of movement of the sheet, and of exerting a relativelyless force in the direction of travel of the sheet. This` is preferably effected by causing the slow-down member to descend into contact with the sheet in substantially an inclined direction, the said inclined direction preferably coinciding with the direction of travel of the sheet. member is rotated positively by timed means forming a part of the machine and at a slower rate of speed than the speed of the sheet forwarding means. In the specific form disclosed, the slow-down member is pivotally supported from a rotating shaft. A rockshaft isv provided which is caused to rock by suitable means such as a cam.mount ed on the rotating shaft, and connections extend from said rockshaft to bring the slow-down member into and out of engagement with the sheet. y l

The invention further consists of a detector device in which is embodied a rockshaft having a connection by means of which said rockshaft may be turned from a cam on a rotating shaft, together with a sheet detector which under abnormal conditions serves vto form a connection between the rocking Specification of Letters Patent.

Preferably the slow-downv Patented Mar. 28, 1916.

Serial No. 780,529.

i sheets.

The relation between the slow-down device and the side registering device also forms a feature of the invention in that the said members are located insubstantially the same transverse plane, and in the further fact that the slow-down member and thel side registering' member are preferably operated from the same rotating shaft. An advantage is further derived by placing the slow-down member at the front end of the feed board of the sheet supportclose to the front gages. In this manner the said slowdown device need not be adjusted longitudinally of the sheet support in order to act on different sheet lengths.

The invention also consists in the construction of the side registering device, in that aside registering member or roll is moved up and down into contact with the sheet, said roll being preferably mounted on a rotating shaft from which it is positively driven, and in the fact that a top guide is provided which moves down over the sheet ahead of the downward movement of the side registering device so as to p revent the sheet from buckling upward.

Other features of construction, combination of parts and arrangement of elements will appear as the specification proceeds.

In the accompanying drawings the invention is embodied in a concrete and preferred form, but changes of construction 'may be made without departing from the legitimate and intended scope of 'the invention as expressed in the annexed claims` ln the said drawings: Figure l is a top plan view of the forward end of the machine, or lower end of the feed-board, embodying the invention. Fig. 2 is a side elevation of the parts shown in Fig. l, arranged adjacent to a printing machine. Fig. 3 is a side elevation of the parts similar to Fig. 2, but looking from the other side of the machine. Fig. 4 is a top plan View of the side registering mechanism. Fig. 5 is a View in elevation of the side registering device, showing the parts in their lowermost position. Fig. 6 is a view similar to F ig; 5 with the parts in their uppermost position. Fig. 7 is a sectional view on the line 7-7 of Fig. 8. Fig. 8 is a sectional view on the line 8 8 of Fig. 5. Fig. 9 is a view in elevation looking in the direction of the arrow 9 in Fig. 14. Fig. 16 is a, sectional view on the line 10-10 of Fig. 14. Fig. 11 is a perspective view of the detector member. Fig. 12 is a perspectiveview of the bracket for supporting the slow-down device and detector mechanism. of an arm forming part of the slow-down device. Fig. 14 is a detail view of the slowdown device and adjacent parts, the supporting shafts being shown in section, showing the slow-down device in its lowermost position. Fig. 15 is a view silnilar to Fig. 14. with the slow-down device in its uppermost position. Figs. 16 and 17 are details of the detector device showing the effect of the absence of a sheet of paper.

Similar characters of reference indicate corresponding parts in the several views.

1 indicates a feed board or other suitable member constituting a Sheet path or support arranged adjacent to a printing or other machine 2. Suitable sheet forwarding or feeding means here taking the form of positively driven rollers 3 and drop rollers 4 are provided to advance the sheet over said feed board. Near. the forward end of the feed board 1 are the slow-down devices 5 located closely adjacent to the front gages 6 so as to obviate the necessity of adjustment of the said slow-down devices for different sheet lengths. This slow-down device is also located in substantially the same transverse plane as the side registering device 7, and intermediate the slow-down device 5 and the front gage 6 is a detector linger 8. The sheets may be separated in any suitable man ner from a bank or pile and-are fed singly to the rollers 3 and 4.

Extending transversely across the feedhoard l is a `rotating shaft 115. Superposed above the saine is a rockshaft 116. Un the shaft 115n is a cam 117 and on the rockshaft 116 is a lever 118 having a roll 119 engaging the cam 117 whereby the rockshaft 116 is rocked from the rotating shaft 115, 120 is a slow down roller driven at a slower speed than the sheet forwarding means 3 and 4. yThis roller 120 is hung in an arm 121 mounted .loosely on the shaft 115, the

parts being so arranged that the said slow down roller will exert a greater force in a direction opposite to that of the movement of the sheet than in a direction coincident with that of the movement of the sheet. rl`his is effected by moving the said slowc down roller up and down in a diagonal direction, preferably in the direction of the movement of the sheet. The roller 120 is rotated by means of the gears 122 and 123.

Fig. 13 is a perspective view Mounted on the rockshaft 116 isV an arm 124 connected by means of a rod 125 to the roller 120'. A spring 126 is coiled around the rod 125 and held between the blocks 127 and 128,

. the tension of the spring being adjusted by means of the block 127. The spring 126 serves to holdthe slow down roller with a yielding tension against the sheet. The movement of the rockshaft 116 causes the slow-down rollerV to. raise and lower with a yielding pressure into and out of engagement with the sheet.

Adjacent to the shafts 115 and 116 is another rockshaft 130. Mounted on this rockshaft 130 is a lever 131 carrying a detector arm 132, provided at one end with a detector finger 8 and at its other end with a hook 134. The finger 8 projects over the impression cylinder 135 which is provided with a gap 136. If a sheet covers the gap 136 of the impression cylinder at the proper moment, the said finger 8 will be prevented from dropping into the said gap, but if no sheet is there, the said finger will drop into the gap aforesaid and will raise the hook 134 into the plane of the rotating cam 137, which latter will then engage the. said hook and will turn the rockshaft 130. The turning movement of this rockshaft 130 releases an actuating device to stop the machine or to trip the printing press in a well-known manner.

Preferably a bracket 138 is provided for supporting the detector mechanism and the slow-down device, the parts being s0 arranged that both said mechanism and device can be adjusted in unison transversely of the machine. This bracket is provided with bushings 139 and 140 through lwhich pass the rockshaft 116 and intermediate the said bushings 139 and 140, the arm 124 is mounted, being securedto the said rockshaft by the set screw 141. Downwardly depending arms 142 are provided on this bracket through which extends the rotating shaft 115. Between the shaft 115L and one of the arms 142 is a sleeve 143 keyed to the shaft 115% and on this sleeve is the gear 122 and. the cam 137. intermediate the two arms 142 is mounted loosely the arm 121. 0n the lower end of this arm 121 is a. pivot 144 carrying a sleeve 145 having the gear 123 and to which sleeve is keyed the roller 120. The bracket 138 further has two other bushings 146 extending horizontally from the b'uslr ings 139 and 140. The rockshaft 130 extends through these bushings, and therebetween is located the lever 131 secured to the rockshaft 130 by means of the set screw 147. This bracket 138 and the parts carried thereby are located at the front end of the feedboard 1 immediately in rear of the front gages 6 against which the sheet is registered. The front gages 6 are mounted on a shaft 149 which is rocked by means of the cam 150 on the impression cylinder 135, through the pivoted cam lever 151 and finger 152.

Located in substantially the same transverse plane as the slow down rollers 120 is the side registering device 7. Adjacent to the shaft 115'mi 'and at right angles thereto is a shaft 153 provided with bevel gears 154 at opposite ends, either of which is adapted to engage with the bevel gear 155 on. the shaft 115, so that the side register can be used oneither side of the machine. Mounted loosely on said shaft 153 are two arms 156 carrying at their free ends the pivot 157. Mounted loosely on the pivot 157 is a bushing 158 carrying a gear 159 adapted to mesh with the gear 160 keyed fast to the shaft 153. Secured to gear 159 is a cam 161 adapted to engage with the bearer 162 by means of which the pivot 157, and consequently the side registering roller 163, is moved up and down. Said roller 163 is mounted loosely on the bushing 158 and has a rubber covering or face 164. Secured rigidly to the bushing 158 are spring arms 165 which engage in slots 166 of the friction ring 167 engaging the innner face 168 of the roller 163.- By this means the rotating motion of the bushing 158 is imparted, through the slip or friction drive described,'to the side registering roller. The object of this friction drive is to cause different portionsl of the roller 163 to engage with the sheet so that the rubber 164 will not wear in one spot but will wear evenly all around. Mounted adjacent to the roller 163 on the pivot 169 is a top guide 17 G` actuated from one'of the arms 156 by means of the slottedlink 171 and extension 172. The parts are so arranged that the top guide 170 will descend ahead of the roller 163 and rise later than 'the roller 163, so that the sheet will not buckle as it is moved side-v wise. A swing 173 is provided for holding the cam 161 against the bearer 162. Anothr spring 174 is provided between the top guide 170 and the extension 172 which tends to pull the top guide 17 0 downward when permitted to do so by the slotted link 171 and pin 175. The side registering device as a whole is mounted on the bracket 176 secured by means of bolts 177 to the slide 178 in feed-board 1. A plurality of holes 179 are provided so that the side registering de.- vice may be adjusted to different positions transversely. yOr the side registering device may be removed and reversed and placed on the other side of the machine. Either of the gears '154 may engage with the gear 155, and the latter may be adjusted by means of a key in the shaft 115a so as to correspond withthe adjustment ofthe side registering device. Finally the slide 178 may be adjusted transversely ofthe. feed-board 1 by means of a threaded stem 180 seated on the framework and passing through a depending porv tion 181 of the slide 178, a knurled piece 182 being utilized to move the slide 178 on the threaded stem 180.

As the sheet passes down the sheet support 1 it will be fed forward by they rollers 3 and 4 until it reaches the desired distance from the front guides, down to one-half an inch. -The rollers 4 are then lifted simultaneously with the lowering of the slowdown rollers. The sheet is then slowed down quickly to the speed of these rollers 120 byl reason of the fact that the rollers move in an incline and that the sheet becomes wedged. The sheet is then advanced with a light push, regulated by the tension of the spring 126 until it registers against ther guides. The sheet then stops moving and the roller rotates, slipping on the sheet as 1t turns, until it is raised by cam 117. After the sheet strikes the front guides the side registering roll 163 will descend, the shoe or top guide 170 having previously descended, and the said roller 163 will move the sheet sidewise into register with the slde register surface 182a of the side registering device. In due course the sheet. will pass to the grippers on the impression cylinder (if the device is used in connection with a printing machine) in the usual way.

If a sheet is fed at the proper time, it will cover the gap 136 in the impression cylinder when the detector vfinger 133 descends and will sustain the latter so that the hook 134 will not drop into the notch of the cam 137. But if a. sheet is not present at the proper time, the detector linger 8 will drop int-o the gap 136, the hook 134 will engage the cam` 137, and the rockshaft- 130 will be rocked. The rocking of the shaft 130 will cause the machine to stop, and the press to be tripped in a well known manner.

209 is a longitudinally extending shaft which Adrives the cross shafts 211, carrying the rollers 3, by means of bevel gears 212. That shaft 211 which is nearest the forward end of the sheet support 1 carries a. pinion 213 which meshes with a gear 214 on the stud 215, which drives the slow-down shaft 115a by means of pinions 216 and 217 and gear 218. On the stud 215 is a cam 219 which rocks the arm 220 connected to the rockshaft 221 on which the first set of drop rollers 4 are mounted. Another cam 222 on stud 215rocks the lever 223 loose on the rockshaft 221 and connected by the rod 224 to the arm 225l on the rockshaft 226 on which kthe second set of drop rollers 4 are mounted.

wWhat is claimed, is:

1. In a sheet feeding machine, a sheetl support, a `rotating shaft extending transversely of the sheet support, a rockshaft adjacent to the rotating shaft, a rotatable slow- 4down member supported from the Irotating shaft, means for rocking the rockshaft from the rotating shaft, connections from the rotating shaft for driving the slow-down member, and connections from the rockshaft for raising and lowering the slow-down member.

2. In a sheet feeding machine, a sheet support, a rotating shaft extending transversely of the sheet support, a rockshaft adjacent to the rotating shaft, a rotating slow-down member driven by the rotating shaft mounted to be raised and lowered with respect to the sheet support, means for rocking the rockshaft from the rotating shaft, and connections from the roclrshaft for lifting and lowering the slow-down member.

3. In a sheet feeding machine, a sheet support, a rotating shaft, a roclrshaft adjacent to the rotating shaft, a slow-down member supported loosely on the rotating Ishaft, means for rocking the rockshaft from the rotating shaft, and connections from the rockshaft for lifting and lowering the slowdown member.

l. In a sheet feeding machine, a sheet support, a transversely extending rot-ating shaft above the sheet support, a pair of rockshafts adjacent the rotating shaft, a

slow-down member driven from the rotating shaft, connections from the rotating shaft to one of the rockshafts for oscillating the same, connections fromnsaid oscillated rockshaft to the slow-down member for raising and lowering the same with respect to the sheet support, means on the rotating shaft for rocking the second rockshaft, and a sheet detector arranged to form a connection between the rocking means on the rotating shaft and the second rockshaft aforesaid. 1

5. In a sheet feeding machine, a sheet support, a transversely extending shaft above the sheet support, means for rotating said shaft, a pair of substantially parallel rockshafts disposed above the rotating shaft, a slow-down roller driven from the rotating shaft, connections from the rotating shaft to one of the rockshafts for oscillating the same, connections from said oscillated rockshaft to the slow-down member for raising and lowering the same with respect to the sheet support, means on the rotating shaft for rocking the second rockshaft, and a sheet detector arranged when no sheet is present upon the sheet support to form a connection between the rocking means on the rotating shaft and the second rockshaft aforesaid.

6. In a sheet feeding machine, sheet forwardingmeans, arotating shaft extending transversely of the machine, power transmission mechanism for operating the sheet forwarding means and the rotating shaft,

`a rockshaft adjacent to the rotating shaft,

a second rockshaft adjacent to the rotating device, means for rocking the second rockshaft from the rotating shaft, a movably mounted slow-down member,- means for rocking the slow-down member from the said second rockshaft, means on the rotating shaft for rocking the first rockshaft, and a sheet detector arranged when properly positioned to form a connection between the rocking means on the rotating shaft and the first rockshaft. 4

7. In a sheet feeding machine, a sheet support, means for forwarding the sheets over said support, a rotating shaft extending transversely above the sheet support, power transmission mechanism for operating the sheet forwarding means and the rotating shaft, a rockshaft adjacent to the rotating shaft, asecond rockshaft adjacent to the rotating shaft, a slow-down roll pivotally supported upon the rotating shaft,

gearing for rotating the slow-down roll from .the rotating shaft, means for rocking the second rockshaft from therotating shaft, connections from the second rockshaft for raising and lowering the slowdown roll with respect to the sheet support, means on the rotating shaft for rocking the first roclrshaft, and a sheet detector arranged in the absence of a sheet upon the sheet support to form a connection between the rocking means on the rotating shaft and the first rockshaft.

8. In a sheet feeding machine, a sheet support, means for forwarding the sheets over said support, a rotating shaft extending transversely above the sheet support, power transmission mechanism for operating the sheet forwarding means and the rotating shaft, a rockshaft arranged parallel to the rotating shaft, a second rockshaft arranged'substantially parallel to the rotating" shaft, a slow-down frame pivotally hung on the rotating shaft, a slo\ -down roll journaled in said frame, gearing between the rotating shaft and the slow-down roll for rotating the same, connections between the rotating shaft and the second rockshaft for oscillating said second rockshaft, connections from said second rockshaft to the slowdown frame for raising and lowering the slow-down roll with respect to the sheet support, means on the rotating shaft for rocking the first rockshaft, and a sheet detector arranged' in the absence of a sheet upon the sheet support to form a connection between the rocking means on the rotating shaft and the first rockshaft.

9. In a sheet feeding machine, a slowdown rockshaft, a rockshaft, a rotating shaft, a slow-down member operated from the rotating shaft, means for rocking the slow-down rockshaft from the rotating shaft, means for raising and lowering the slow-down member on the Slow-down rocks'haft, means on the rotating shaft .for rockmg the rockshaft, and a sheet detector arranged when properly positioned to form a connection between the rocking means on the rotating shaft and the rockshaft.

10. In asheet feeding machine, a slo-wdown rockshaft, a rockshaft controlling the stop mechanism, a rotating shaft, a slowdown member loosely supported upon the rotatingshaft, gearing between the rotating shaft and the slow-down member for operating the same, means for oscillating' the slow-down rockshaft `from the rotating "shaft, means for raising and lowering the Slow-down member from the slow-down rockshaft, means on thel rotating shaft for rocking the rockshaft, and a sheet detector arranged in the absence of a sheet to form 4 a connection between the rocking means on the rotating shaft and the rockshaft.

11. In a sheet feeding machine, a sheet support, transversely extending parallel supporting shafts arranged above the sheet support, means for rotating one of the said shafts, a. bracket supported on the shafts and adjustable longitudinally thereon, a slow-down frame mounted on one vof the shafts and engaged by the bracket so as to be movable therewith, a slow-down member carried by said frame, means for rocking one of the supporting shafts aforesaid, and connections from said .rocking shaft to the slow-down frame for raising and loweringl the'same, the said connections being also engaged by the bracket so as to be adjustable therewith.

12. In a sheet feeding machine, a sheet support, transversely extending parallel supporting shafts arranged above the sheet support, means for rotating one of theV said shafts, abracket supported on the shafts and adjustable longitudinally thereon, a slow-down member loosely hung onthe rotatable shaft and engaged by the bracket so as to be movable therewith, mea-ns for rocking one of the supporting shafts, and connections from the rocking shaft to the slowdown member for raising and lowering the same, the said-connections being also engaged by the bracket so as to be adjustable therewith.

13. In a sheet feeding machine, a sheet support, parallel supporting shafts disposed above the sheet support, means for rotating one Vof said shafts, a bracket supported on the shafts and adjustable longitudinally thereon, a frame loosely hung on the rotating shaft and engaged by the bracket so as to be movable therewith, a roller journaled in said frame, driving connections between the rotating shaft and said roller also engaged by the bracket so 4as to be adjustable therewith, means for rocking one of the `supporting shafts, connections from said rocking shaft to the frame for raising and lowcrying the same with respect to the sheet support, and the said connections being engaged by the bracket so as to be likewise adjustable with the bracket on the supporting device.

14. In a sheet feeding machine, av sheet support, transversely extending parallel shafts arranged above the sheet support, bracket supported on said shafts and adjustable longitudinally thereon, means for rotating one of the shafts, and means for rocking one other of the shafts, a frame loosely hung on the rotating shaft engaged by the bracket so as to be movable therewith, a roller journaled in the frame, driving connections between the rotating shaft and said roller, said driving connections being engaged by the bracket so as to be shifted in unison with the adjustment of the bracket, and connections from the rockshaft to the frame for raising and lowering the same with respect to the sheet support, the said connections being also engaged by the bracket so as to be movable in unison therewith.

15. In a sheet feeding machine, a sheet support, parallel supporting shafts arranged above the sheet support, a bracket supported on said shafts and adjustable longitudinally thereon, the said bracket having spaced substantially parallel arms engaging over the supporting shafts, means for rotating one of the supporting shafts, means for rocking anotherof the supporting shafts, a frame loosely hung on the rotating shaft and disposed between the substantially parallel arms of the bracket, a roller journaled in said frame, intermeshing gears on the rotating shaft, the gear on the shaft being engaged by one of the arms of the bracket so as to be shifted in unison with the bracket, a

yrocker arm engaged on the'rock-shaft between the' substantially parallel arms of the bracket, and connections between said rocker arm and the frame aforesaid.

16. In a sheet feeding machine, a sheet support, transversely 'extending parallel shafts arranged above the sheet support, a bracket supported on the said shafts and adjustable longitudinallyr thereon, the said bracket having spaced arms engaging over the supporting shaft, means for rotating one of the supporting shafts, and means for rocking another of the supporting shafts, a slow-down frame loosely hung on the rotating shaft between the arms of the bracket so as to be movable with the bracket, a slowdown roll journaled in said frame, intermeshing gears on the rotating shaft and the slow-down roller, the gear on the rotating shaft being engaged by one of the arms of the bracket so as to move in unison with the bracket, a rocker arm on the rockshaft engaged between the arms of the bracket so as to move in unison with the bracket, and connections from said rocker arm to the slowdown frame.

17. In 'a sheet feeding machine, sheet forwarding means a transversely rotating shaft disposed above the said sheet forwarding means, a pair of substantially parallel rockshafts arranged above the rotating shaft, a bracket having spaced arms loosely engaging over said shafts and supported thereby, a slow-down frame loosely hung on the rotating shaft and engaged between two of the arms of the bracket so as to be movable therewith, a slow-down roller journaled in said frame, driving gears from the rotating shaft to the slow-down roller, the gear on the rotating shaft being engaged by one of the arms of the bracket so as to move in unison with the bracket, a rocker arm on one of the rockshafts engaged between the arms of the bracket so as to be movable with said bracket, connections between the rocker arm and the slow-'down frame and a rocker arm on'the other rockshaft engaged between the arms of the bracket so as to be movable with the same.

18. In'a sheet feeding machine, a sheet support, a transversely extending rotating shaft above the sheet support, a stop motion rockshaft and a slow-down rockshaft arranged parallel to the rotating shaft, a bracket having spaced arms engaged by all of said shafts and supported thereby, a slowdown frame loosely' hung on the rotating shaft between -the armslof the bracket so as to be movable with the'bracket, a slow-down l roller journaled in said frame, intermeshing gears on the rotating shaft and the slowdown roller, a rocker arm on the slow-down rcckshaft' engaged between the arms of the bracket so as to be movable with the bracket, connections from said rocker arm to the slow-down frame, a rocker arm on the stop vmotion rockshaft engaged between the arms of the bracket so as to be movable in unisonv therewith, and operating`means for said last-mentioned rocker arm on the rotating shaft and engaged by one ofthe arms of the bracket-so as to be movable in unison with the bracket.

19. In a sheet feeding machine, a sheet support, a rotating shaft disposed above the same, a slow-down roller journaled on the axis substantially parallel to the rotating shaft, gearing from the rotating shaft for rotating the slow-down roller, la side registering roller journaled on an axis substantially at right angles to the rotating shaft, and gearing from the rotating shaft for driving the side registering roller.

20. In a sheet feeding machine, a sheet support, a transversely lextending .shaft above the sheet support, a side registering roller, a carriage in which the side registering roller is mounted, said carriage being. reversible to render the side registering roller operative to register either side, and intermeshing reversible gearing' between the rotating shaft and the side registering roller.

21. In a sheet feeding machine, a sheet support, a transversely extending rotating shaft above the sheet support, al reversible side registering device associated with the sheet support, and driving means on oppo site sides of said side registering device for engagement with the rotating shaft in either position of the side registering device.

22. In a sheet feeding machine, a sheet support, a transversely rotating shaft above the sheet support, oppositely facing bevel gears at the opposite ends of the rotating shaft, a carriage arranged to be secured adjacent eithe'r end of the rotating shaft, a side registering roller journaled in said carriage, a driving shaft for said roller journaled in the carriage, and bevel gears on the opposlte ends of said driving-shaft for engagement With one of the bevel gears on the rotating shaft.

23. Side registering mechanism comprising, in combination with a sheet support, a driving shaft, a frame pivoted upon said driving shaft, a roll journaled in the free end of said frame, driving gearing between the driving shaft and the.roll for rotating the same, a cam carried bythe roll, a relatively xed abutment roll arranged to be engaged by the cam, and means for holding the cam in proper engagement with the abutment roll.

24. Side registering mechanism comprising, a driving shaft, a driving gear on said shaft, a std parallel to the driving shaft, a driverrgear on said stud provided with a hub, a side registering roll loosely engaged on the hub of the driven gear, and a member securedon the hub and making frictional engagement with the side registering roll.

25. In combination, a sheet support, a side guide, a driving shaft, aframe loosely pivoted on said shaft, a side registering roll journaled in said frame, gearing between`

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