US928887A - Printing-machine. - Google Patents

Description

H. J. SMITH 6: A. S. WOODWARD. PRINTING MACHINE.

APPLICATION FILED AUG. 3, 1908. 928,887.

Patented July 20. 1909.

H. J. SMITH & A. S. WOODWARD.

PRINTING MACHINE.

APPLIOATION FILED AUG. a, 1908.

Patented July 20, 1909. 5 sums-sum 2 H. J. SMITH & A. S. WOODWARD.

PRINTING MACHINE.

APPLICATION FILED AUG,3, 1909.

928,887 Patented July 20. 1909.

SHEETS-SHEET 3,

PRINTING MACHINE.

APPLICATION FILED AUG.3,1908

Patented July 20, 1909.

H. J. SMITH & A. S. WOODWARD.

H. J. SMITH & A. S. WOODWARD.

PRINTING MACHINE.

APPLICATION mum mum. 190a.

5 SHEETS-IRES? 5.

Patented July 20, 1909.

-ZZU/(ZFJ/ a ar ,zgflmirwk'bv Wjw H WM I \\v J x -w w H W. 1 1M ll/waesaear 1 i UNITED STATES PATENT OFFICE.

RAZOR J. SMITH AND ALBERT S. \VOODWARD, OF CHICAGO, ILLINOIS, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO AUTOMATIC LETTER MACHINE COMPANY, OF CHICAGO,

PRm'TmG-MAOHINE.

Specifigation of Letters Patent.

Patented July 20, 1909.

Application filed August 8, 1808. Serial No. 6,680.

To all 'tvhom it my concern:

Be it known that we, Hazoa J. Smrn and Aun-m'r S. Wooowann, citizens of the United i States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Printing- Machines, of which the following is a specification.

This invention relates to an improvement in printin niachines more especially of the class in w ich the printing is performed by means of an inked or carbon-coated ribbon or sheet interposed between a bed of type, or the like, and the sheet to be printed, the impression being produced by a platen usually in the form of a rubber-coated roller moving across the rear face of said sheet. Machines of this class are designed for use in mercantile houses, oflices, etc., for the production of form letters circulars and the like, printed in imitation of typewritten work, or otherwise our object is to provide a printing machine of this class of a particularly simple and generally improved construction adapting it for turning out printed sheets with great rapidity and with even im ressions oughout without dan r of the s eets being soiled by what is ed ribbon smear in their passage through the machine.

In the accompanying drawings Figure 1 is a side elevation of a rinting machmt of the character described and of our improved construction; 2, a 1011 'tudinal section taken on line 2 in Fig. 3, at upon the same scale as Fig. 1; Fi 3, an elevation on an enlarged scale of the out or feedingend of the machine; Fig. 4, a broken section on the same scale as Fig. 1, the section being taken on line 4 in Fig. 8, showing the ty bed by dotted lines and showing by all lines certain moving parts in the relative positions they occupy just previous to the commencement of a printing operation, the relative p tions of the same parts at the time of commencing aprinting 0 oration being indicated by dotted lines; ig. 5, a broken, detail, top-plan of paper-gripping and feeding mechanism showing the position It occupies while at rest during a printing operation with its gripping jaws open ready to engage u sheet 1' to it, Fig. (3, a View similar to Fig. 5 but showing the relative positions of parts when the feed mechanism as gripped a sheet and is about to move backward to feed and position the sheet over the type-bed; Fig. 7, a section taken on line '7 m 1g. 5 and showing by full li e th relative positions of coiiperating part wh the movable jaw of the paper-gripping d feed-mechanism is open to receive a sheet and showing by dotted lines the position oi the same parts when they have been moved to cause the gripp' of a sheet; 8, an enlarged section to en on line 8 m Fig. 5, showing by full lines the position of parts when the movable gripping-jaw is open and by dotted lmes their position when said jaw is closed; Fig. 9, a section taken on the same lme as Fig. 4, but showing the movi parts 111 the position they occupy at the time of the completion of aprmting movement; Figs. 10, 11 and 12 enlarged broken sideelevations of one of three similar paperippmg and feeding devices and the means or causin them to release and discharge the printe sheets, Fig. 10 showing the relative positions of arts before such release, Fig. 11 their positions durin release, and Fig. 12 their 'tions after ease; F' 13, an enlarged ragmentary plan-view o the type-bed, showing means for positioning the chase and Fig. 14, a section taken on line 14 in Figs. 1a and a.

The machine is formed with a suitable supporting frame consisting of parallel sidebars 14 and 15. having longitudinally-extending channels in their outer faces, and connected by a plate 16. The side-bars are supported at their forward ends on similarly-shaped legs 17 and at the rear ends upon the legs 18.

19 is a drive-shaft journaled in bearings in the legs 17, and, in the construction shown; it carries a geauwheel :20 at. which it may be geared to the armature shaft of an electric motor. It. is to be understood, of course. that power may be a )plied in any other suitable way to drive the s aft. Beyond the legs 17 the drive-shaft carries cranks 21. Toward one side of the machine the shaft 19 carries an eccentric 22. of the shape shown, for example, in Fig. 9, and toward the opposite side of the frame it carries a larger eccentric 23 shaped us shown lllUHl clearly in Fig. 2.

, nel- The side bars 14, 15 form tracks upon which is mounted a traveling-head or carriage 24 provided at opposite ends with depending portions 25 on which are journaled rollers 26 rnnnin in the channels or chan- 'des form in the outer faces of the side- The traveling-head or earring: is connected at opposite ends with the cran 21 by eonnecti rods 27, whereby 1n the rotation of the rive-shaft 19 it is reciprocated from the rear end of the frame, the position shown in 'Fi 1 and 2, nearly to the forward end of e frame, the position indicated in Fig. 9. The cheeks or e udportions 25 of the traveling hca are liii urcated in their upper parts to resent guide-o enings 28 which are fitt wlth ournal-Eoxes 29.

30 is a shaft reducedat opposite end-portions to form journals 31 havm their bear ings in the boxes 29. Just within the checks of the traveling-head the shaft 30 carries rollers 32 and between the rollers 32, as shown most clearly in Fig. 3 it carries a roller 33 which may be aced or covered with rubber, as indicated in Fig. 2.

Exten across the openings 28 in the checks of t e traveling head are eccentric shafts 34 provided at their ends with thumbnuts 35 by means of which they may be rotated. At their eccentric rtions the shafts 34 bear upon the to o the boxes 29 and by turning the said iafts the said boxes and co entl the rollers 32, 33 may be adj to di erent elevations in the traveling head. The shafts 34 may be secured against tn by means of the set-screws 36.

the inner faces of the side-bars 14. 15 are Io 'tudinally-extending ribs 37. Just within t is side- bars 14, 15 are bars or trackrails 38 provided each with three depending lugs 39 threaded along their lower end-portions. The in pass thr h openings in the ribs 3? ang are provi hfi at the under sides of the ribs with nuts 40. Surrounding the lugs and confined between the ribs 37 and track-rails 38 are springs 41. The springs operate as resilient supports for the track-rails and their tension may be adjusted by means f the nuts 40. The bars 38 form a. resilient track for the rollers 32 to ride upon and are chamfered at opposite ends to rmit the rollers to move on to them rea il The function of the resilienttrack will be explained later on.

Secured at their up r ends against the inner faces of the sidems of the frame are dependin plates 42 and 43, in the lower ends of w ich is mounted a stationary crossshaft 44. The shaft 44 carries a depending bracket 45 to which is fastened a stationary bar 46 which at its forward end is rovided with an opening to surround the drive-shaft 19. The shaft 19 in this way is utilized as a support to aid in stendying and holding rigid the bar 46. Journaled upon the shaft 44 are a gear-wheel 47 and a ratchet-wheel 48 integral with each other.

Fulcrumed at one end upon the end of the bar 46 is a swinging lever 49 provided at its free end with a roller 50 whlch rides upon the face of the eccentric 23. The lever 49 carries a pivotal pawl 51 engaging the ratchet-wheel 48. The lever 49 is swung upon its fulcrum by therotation of the eccentric 23 and in itsnpward swing it engages a tooth of the ratchet-wheel 48 and turns the said wheel and the gear-wheel 47, in the present construction, exactly one-fifth of a revolution.

Journaled in opposite end-portions of the side- bars 14, 15 are shafts 52 and 53, each carrying a pair of sprocket-wheels 54 located near 0 gosite ends of said shafts. Secured to an epending from the under side of the plate 16 near o3posite ends of the same are hangers or brackets 55, 56 on which are journaled s rocket idlers 57 in the vertical planes 0 the sprockets 54. Stretched around the sprocket-wheels and idlers is a pair of parallel ta ms 58 in the form of chains or link-belts a apted to endlge the teeth of the sprocket-wheels and 1 ers in a common manner. The tapes or chains 58 carry three similarly-constructed paperfeeding gripping-devices 59 spaced apart a distance equal to exactly one-third t e length of the chains. Each grippingdevlce comprises a bar 60 provided at opposite ends wlth downwardprojecting lugs 61, as shown most plainly in Figs. 3 and 8, at which they are fastened to the chains 58. Near their opposite ends the bars 60 carry bearing-ears 6-2 in which are journaled the opposite end-portions of shafts 63 which rock in ion itudinal recesses 64 formed in the faces 0 the bars 60. Each shaft 63 carries a swingin plate 65, and said plates and companion Ears 60 formin between them, in each instance,a paper-grip. Coiled about each shaft 63 at the end thereof nearest the side-bar 15 is a spring 66 fastened at one end to the shaft and its opposite end to the bar, the sprin r operating normally to pr$s the plate ownward against the bar 60, thus closi the paper-grip ing jaws. Fastened to t e end of each sha 63 is a laterally-extending finger 6i.

Journaled u on the depending-plate 43 is an idle gear-w eel 68 in mesh with the earwhcel 4i; and the shaft. 52 carries a pinion 69 which is engaged h P the gearavhcel (18.

70 is a cam-shoe an latch comprising a plate having a downwardly-cnrved end-portion 71, cut-away portion presenting the edge 72 and elon ntcd opening 73. The cum-shoe fits sliduily u )0 the upper end of the date 43, being told in place by a screw 4 passing through the elongated opening 7; Extending from one end of the lilo cam-shoe is a bent rod which near its 5 corners. with depending 111 s or legs 93 havfree end slides through a perforated guideprojection 76 on the bar 15. The curved cam-shafts 77, 78 b or cam-portion T1 of the part 70 is in the nth of the fingers 67 of the iaper-gripping cod-devices and the. free 01 of the rod 75 when in the backward position illustrated in F ig. .3 is in the path of movement of a check 25 of the traveling-head 24, which in its final movement toward the front end of the machine, by engaging the end of the rod ing concave lower ends to at closely over the which the ty e-bed is alone supported. he bed 91 is adilpted to receive and position a printers chase 94 in which may be locked the type, or other form to be printed, in a common manner.

75, moves the cam-shoe and latch device described to the position shown in Fig. 6. In the movement of a paper-grip ing ceddevice to the en agemcnt 0 en?! of the cam-shoe forces the latter to the position shown in Fig. 5. hen the camshoe has sto wed in this position the final movement of the ripping-device to the position shown in fig. 5 turns the timer and shaft 63 to the position indicated most T The cam-shafts 7T, 78 maintain the t pe-bed parallel with the plane of the patl i of the impression-roller 33. Extending from o iosite ends of the type-bed frame 91 at t e egs 93 (see Fig. '2) are lugs 95 forming bearings for the opposite ends of ribbonfposition shown in ig. 5 the its finger (37 with the curved shafts 96. On each of the shafts 96. adjacent to the side-bar 15, is a ratchet wheel 97, and ivotally connected to the said side-bar ad- ]acent to the said ratchet-wheels are pawls 98. It is to be understood that when a chase containing the form to be printed is placed upon the type-bed 91 an inked ribbon 96, of a width equal. at least. to the width of the plainly by full lines in Fig. 8, opening the fi-ip for the reception of a sheet of paper to fed into the machine. The gripping-device remains at rest durin the movement I of the traveling-head to the forward end of the machine as will be more fully explained farther on. and in its final movement in that direction the head engages the end of the rod 75 and moves the cam-shocand latch mechanism 70 to the position shown in F' 6, whereby the edge ?2 is moved past t 1e finger 6? to release it and permit the swinging jaw of the grip-device to be closed by the spring 66.

77 and '1' 8 are parallel transverse camshafts journaled eccentrically at their reduced end-projections 79 in adjustable journal-boxes 80. The journal-boxes are in hangers 81 fastened against the under faces of t e side- bars 14, 15 and the boxes are adjusted to raise and lower them in the hangers by means of the set screws 82. Big idlyl isecuned t8 tfltie shafgs TLdTS, \El-iich are roc'mgcam-s a s, are e n 7ers 83 connected to ether by a rdil s i hicli is below and parajlel with the side-bar 1-1.

F ulcrumed at against the inner face of the depending-plate 42 is a bell-crank lever 86 carrying at the end of its shorter arm a roller 87 which rides upon the face of the eccentric 22, as shown plainly in F ig. 4. The longer arm of the bell-crank lever 86 is pivotally connected with the adjacent finger form to be printed and attached at its opposite ends to the respective shafts 96, is stretched over the form to rest upon the type, or the like.

In each rotation of the shaft 19, and consequentlv of the eccentric 22, the bell-crank lever S6 is rocked on the fulcrum 85. Owi to its link-connection S8 with the bar 8-1 an fingers 83 it rocks the cam- shafts 77, 78 simultaneously and raises and lowers the tvpe-bed. On the bar 84, as indicated most clearly in Fi 4. is a bufl'er-hlock 99. and on the under si e of the plate 16 at the side-bar 14 is a butler-spring 100, againstwhich the bufl'er-block impacts when the type-bed is raised.

The 0 )eration of the machine thus far described 15 as follows: The drive-shaft is 1'0- tated continuously by power applied to the driving ar-wheel The traveling-head :24 carrym the impression-roller 33 is reciprocated y the cranks 21 atthe desired speed hack and forth between the position indicated, for 9X.lll1])l'. in Fig. 1 and that indicated in Fig. 9. The impression-roller is thus moved back and forth over the typebed. the printing in each instance being performed in the movement of the travelinghcad toward the feeding-end of the machine. The eccentric 22 which operates to shift the typebed as described is so constructed and arranged that in the final movement of the traveling-head to. and in its initial movement from. the position shown in Fig. 9 the bell-crank lever 86 is swung by the eccentric 22 to turn the cam-shafts 7T. 78 and cause the type-bed to descend quickly to a position well below its printing-plane, maintainin" it in that position during the backward travel of the said head. bile the head is moving back and forth between the positions indicated by dotted and full lines in Fig. l the eccentric 2'. pcrmits the spring 39 to swing the boll-crank ll'\'(l' and turn the cam-shafts to raise the type-bed quickly to the printing-plane, holding it in that posi' tion durin very nearly the entire forward travel of t c said head. The descent of the tvpe-bed, brought about by the ressure of e eccentric 2'2 against the ro ler 87, is against the resistance of the spring 89 which tends to prevent undue vibration of parts in such descent when the machine is run at high speed. On the other hand, the contact of the buffer-block 99 with the 5 ring 100, in the final rise of the typebrought about by the sprin 89, prevents appreciable jar when the typeed reaches its printingplane. The awls and ratchets 97, 98 are so arranged at in the rise of the type-bed one of the ribbon-shafts 96 is turned to feed the ribbon a short distance from one shaft 96 in the direction of the other. One pawl 98 is thrown into operation at a time to accomplish this result, the other pawl in the meantime being out of operation. When itis desired to reverse the feed of the ribbon the other pawl is caused to operate. In each rotation of the eccentric 23 the lever 49 is swun up and down as before described. The istance of movement given to the pawl 51 in each instance is but slightly in excess of the distance between the teeth of the ratchet-wheel 48, which are five in number. Therefore, during approximately one-half of a revolution of the shaft 19, while the traveling-head is being moved in the direction away from the feeding end of the machine, the pawl 51 engages the ratchet-wheel 48 and turns it exactly one-fifth of a revolution. Dur' the other half of the revolution of the drive-shaft- 19 the lever 49 swings down to the next tooth of the ratchet and the latter remains at rest. The train of ears 47, 68, 69 between the ratchet 4S and shaft 52 is so constructed and arranged that with each one-fifth rotation of the ratchetwheel the tapes or chains 58 are caused i travel in the direction indicated by the arrow in Fig. 1 exactly one-third their length; and there being three paper feeding and ipp' devices equidistant apart carried 5; the c ains, atthe end of each movement of the chains one gripping-device 59 will be left in position at the forward end of the machine, as indicated in Figs. 2, 5 and 8. The gripping-device in advance of the one mentiouet will be just beyond the opposite end of the type-bed and the third rippingdevice will be adjacent to the sproc et-idlers 57. as indicated in Figs. 2 and 10.

While a printing 0 ration is being performed, by the forwar travel of the impression-roller, the gripping-device at the forward end of the machine remains o n. as indicated, and the operator slides a s eat of paper to be printed from the feed-table 102 into the 0 en jaws. As the traveling-head 65 nears the orwnrd end of the machine it engages and thrusts the rod 75, as before de' scribed, moving the cam-shoe and latch device from the osition shown in Fig. 5 to that shown in ig. 6, thereby releasing the finger 67 of the grippin -dev1ce and causin T0 the latter to close an gri the sheet 0% paper at its ed e. In the ihllowin backward travel ot the impression-rolFer and feed-chains the sheet thus grip d is drawn over the type-bed to the sition in which it is to be printed. Vihi e a sheet is thus being fed into the machine the type-bed and attendant parts, including the inked ribbon, are in their lowered position and the sheet of paper as it is drawn into the machine so from one edge and in a plane materially higher than the inked ribbon will not contact with the latter in a manner to become smeared thereby. In the next forward movement of the traveling-head and while the feed-chains and sheet of paper are at rest the sheet, while gripped at its edge, is pressed the impression-roller against the mixed :1 bon which in turn is pressed against the t or the like, of the printingform. The ro er, as before explained, runs upon a resilient track and the pressure exerted in making the impression is governed by the adjustment of the roller in the traveling-head. The resilient track yields only under comparatively great strain and operates by its sustaining force to prevent any change of pressure 0 the roller against the paper when crossing a wide space in the printing-form or passing over a short line of type. Without the resilient track the tendency of the impression-roller would be to cause a short line of type in the form to print more heavily upon the aper than would a long line of tvpe, and tlie function of the resilient track, therefore, is to equalize the impression throughout the sheet. It also causes the roller to commence turning before reachin the type. When a sheet has been engaged y the sheet-gripping device, 110 then in the sheet-recei position, the device. during the next backward movement of the impression-roller, is moved to the po sition wherein it holds the sheet while the same is bein printed. In the next fo1low- 115 in backward movement of the im ressionroller the device is moved to its sleet-discharging position. Thus when a sheet has been printed it is advanced by the respective gripping-device until the latter stops at its 12 sheet-discharging position. adjacent to the idlers 57, as indicated in Fi 10. The gripping-device remains close and quiescent in this position during a half revolution of the drive-shaft, while the next print- 125 ing operation is being erformed. and in this period the rear end ot thc sheet has time to sink down upon the receiving lutform, or the like. 103, indicated in Fig.

On the hanger 56 is u stationary bent plate presenting a cam-face 105 in (5 ing jaw of the gripping-device. This openi of eases the sheet of paper 831% permits it to drop freely upon the;

the jaw re receiving-table 103. When the vice has passed the end of the co 105 the spring 66 closes the jaw again, as indicated a in Fig. 12.

To I time it is necessary that the impressionroller shall never contact with the inked ribhon. As a means for preventing such con- 3 tactwhen sheets of paper are not being fed into the machine we provide the mechanism shown most plainly in Figs. 1 and 9. A bellcrank lever 106 fulcrumed against. the sidebar 14, at 107, has its long arm shaped to form a handle 108. Its short arm 109 may I be moved to a projecting stop 110 on the side-bar 14. Extending throu v 1 the adjanding-plate 42 an fulcrumed cent depe therein is a short rock-shaft 111 carrying on the inner face of said plate a swingi w linger or sto 112 in the vertical plane of t e long arm 0 the bell-crank lever 86. On the outer side of the plate 42 the rock-shaft 111 is provided with a crank-arm 113 connected by means of a link 114 with the short arm 109 of the lever 106. Normally the lever 106,

swinging-stop 112 and attendant parts are in the positions indicated. By swinging the levet to the stop 110 the sto or finger 112 with the lever 86 holds the tion the inked ribbon lies well below the printin -planc, consequently backward and forward movement of the traveling-head will not cause the im ressiou-roller to confact with the inked ri bon.

In the construction shown and described the feed of the sheets and their position durmg the printing operation are never varied. This makes it desirable therefore to have means for adjusting the chase. longitudinall of the type-bed to position it properly wit 1 reference to the sheets. For this urpose we provide a block 115, mounted to s ldc in a recesS 116 in the forward end of the type-bed 91. The block carries a chase-ch nging projection 117 and may be moved longitudinally of the bed, a distance sufficient to properly position the chase. by means of an adustmg screw 11S pmvitlctl with a thumbpiece 119.

In the use of our machine a sheet may be e fingers 67. In the initial revent it smearing the sheet at any finger 112 is turned I to the position indicated by dotted lines in Fig. 9 against the lever 86 to hold it in the 'tion of maintaining the type-bed in its I owered position. The engagement of the 2 P printed with every revolution of the driveshaft and the speed of operation is onl limited by the s ced of the said shaft. wing to the bufferlock 99 and buffer-spring 100 no jar upon the arts occurs in the sudden rise of the typed to the printing-plane and the machine operates smoothly and comparatively noiselessly. Ample time is given for the proper feed of sheets to the grippingdevices and ample time is iven for the proper discharge of sheets mm the ma.- chine. all as explained.

Locating the drive-shaft 19 and cranks 21 below the plane of the path of the head or carriage, as shown, not only shortens the machine and renders it more compact, but contributes other advantages by-causin the materiall r l in the backward direction than in the orward 1 or printing direction. As the speed at which i the im iression roller may travel in the {orward ircction, and turn out perfect work, is limited. which does not a ply to the backi impression-roller to trave E ward movement of the rol er, the speed of operation of the machine is materially increased and its capacity proportionately augmented by thus locating the center of rotaj tion of the cranks away from the plane of travel of the roller. It also allows more 5 time between printing movements of the impgessiomroller for feeding sheets to the mat c ine.

While we prefer to construct our improvements throughout as shown and described i they may, obviously, be modified as to detail 1 of construction without departing from the s irit of our invention as defined by the l c aims.

1 What we claim as new and desire to secure by Letters Patent is 1. In a printing-machine, the combination with a type-bed, of an impression-roller, means for reciprocating the impression-roller across the t v )c-bed, parallel endless sheetfeeding and iseharging tapes a sheet-gri 1 ping device on the tapes and intermltten y f actuated driving means for the tapes operut-ively timed to move said gripping device across the ti'pe-bed between the printing movements 0 said roller.

2. In a printing-machine, the combination with a type-bed, of an im ression-roller, 5 means for reciprocating sai roller across 5 the type-bed, means for causing pressure 3 against the type-bed of the roller mits print- 3 mg movement and means for preventing contact with the type-bed of the roller in its reverse movement, parallel endles sheet- I feeding and discharging tapes :1 sheet-gri ping device on the tapes, and intermittent y actuated driving means for the tapes operl allvely timed to move said gripping-device across the type-bed between the printing 1 movements of said roller.

1 3. In a priMing-machine, the combination with a type-bed, of an ression-roller, means for reciprocating sa1 roller across vice on the tapes, an cam-actuated intermittent driving means for the tapes operatively timed to move said gri ping-device across the type-bed between e printing movements of said roller.

4. In a rinting-machine, the combination with the rive-shaftand type-bed, of an impression-roller actuated from the drive-shaftto reciprocate across the type-bed, parallel endless sheet-feeding and discharging tapes, a sheet-gripping device on the tapes, a drivear for the tapes, and means for advancing the tapes intermittently coin rising a rotary cam actuated lag the drive-s aft, a swinging lever actuat by said cam, a ratchetwheel operatively connected with said gear, and a pawl on said lever engaging said ratchet-wheel.

5. In a printing-machine, the combination of a type-bed, a reciprocating impresiom roller, type-bed shift g means operatively timed to move the type-bed and position It in its printing plane dur' the printing movement of said roller an to retract the type-bed and position it away from said printing plane during the movement of said roller in the reverse direction, parallel endless sheet-fee and discharging tapes, a sheet-grip ing evice on the tapes, and intermitten y actuated driving means for the tapes operatively timed to move said gripgng-device across the type-bed while said is in its retracted position and to hold said i ping-device againstmovementwhile said iidhs in its printing position.

6. In a printing-mac-hme the combination with a type-bed, of an impression-roller, means for reciprocating the im ressionroller across the type-bed, aralle endless sheet-fceding tapes, a norma ly closed sheetgri ping device on the tapes, means for 1101 ng said device open in its sheet-rec ving position, and intermittently actuated driving means for the tapes operatively timed to move said device across the typebed between printing movements of said roller.

7. In a printing-machine, the combination v eases? sheet-feedi and dischar g tapes, a normally close tf sheet rippin g device on the tapes, means for he ding said device open in its sheet-receiving position intermittently actuated driving means for the tapes operatively timed to move said device across the type-bed between printing movements of said roller, and means for o ening said device as it passes its sheet discharging position.

8. In a printing-machine, the combination with the type-bed, reciprocat' -head and impression-roller journa ed in t e head, of parallel endless feed-ta es, means operating to advance said tapes uring the movement of said roller in one direction, means for holding said devices. open in their sheetreceiving position and means for causi closure of said devices, before the leave sai position, actuated by said head in its final movement in the opposite direction.

9. In a priutin -machine, the combination with the type-betI and reciprocating impression-roller of parallel endless tapes, normally-closed sheet-gripping devices on said tapes, means operating to advance said tapes during the movement of said roller in one direction, a movable catch, in the path of movement of said grippingdevioes to their sheet-receiving position, operating to engage and hold said gripping-devices open in said position, and means operating to move said catch and cause closure of said gripping-devices before they leave said position.

10. In a rinting-machine. the combination with t e type-bed and reci rocating impression-roller. of parallel en ess feedtapes, normally-closed sheet-gripping devices on said tapes, means operating to advance said tapes during the movement of said roller in one direction, a catch in the path of movement of said gripping-devices to their shectreceivin position, movable, by engagement therewith of said devices, to a position wherein it holds said devices open in their sheet-receiving msition, and means operating to move sair catch and cause closure of said gripping-devices before they 1 leave said position.

with a type-bed, of an impression-roller,

means for reciprocating the im ressionroller across the type-bed, paralle endless HAZOR J. SMITH. ALBERT S. 'OODW'ARI).

In presence of L. G. I lRKLANl), J. (l. ANDERSON.

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