US2229346A - Multicolor printing machine for glass, metal, and the like - Google Patents

Description

F. SHURLEY 2,229,346

MULTICOLOR PRINTING MACHINE FOR GLASS, METAL, AND THE LIKE Jan. 21, 1941.

Filed April 27, 1936 5 Sheets-Sheet l 3' gi Frederic/r Jjhurlez F. SHURLEY Jan. 21, 1941.

MULTICOLOR PRINTING MACHINE FOR GLASS, METAL, AND THE LIKE Filed April 27, 193B 5 Sheets-Sheet 2 3 woc/wtom Peder/bk Jbur'lell Jan. 21, 1941. F. SHURLEY 2,229,346

MULTICOLOR PRINTING MACHINE FOR GLASS, METAL, AND THE LIKE Filed April 27, 1938 5 Sheets-Sheet 3 l J 7-" i 60 Z9 f Z? I I lllk A 66 59 /7jl 67 a 72 73 :5 6; 49 5g 9 35 O O Q o a 3 i 4 331 I I l 4/2 H] L I n I i 1 26 26 '1' //4 #6 1/8 I 1 ll /9 //8 i I| I I I I u 22 I 1 o I //5 i I" A24 I I 3 I I 28 mz fi lffi y, 1 25 W w n E A23 5 77 I I I 727 m9 H 0 m3 24 Wu 1 z I l l [I 4 I I I l I I 5/26 2'2? I I i Jan. 21, 1941. F. SHURLEY 2,229,346

I MULTICOLOR PRINTING MACHINE FOR GLASS, METAL, AND THE LIKE I Filed April 27, 1938 5 Sheets-Sheet 4 F. SHURLEY Jan. 21, 1941.

IULTICOLQR PRINTING IACHINE FOR GLASS, METAL, AND THE LIKE 5 Sheets-Sheet 5.

Filed April 27, 19158 Patented Jan. 21, 1941 UNITED STATES MULTICOLOR PRINTING FOR GLASS, METAL, AND THE LIKE Frederick Shurley, Windsor, Ontario, Canada assignor to Guthrie Ceramic Labelling & Ma-

chinery Co. Inc., Dover, Del., a corporation of Delaware Application April 27, 1938, Serial N0. 204,653

11 Claims.

This invention relates to multicolor printing machines for glass, metal and the like.

An important feature of the invention is to cardboard, leather, Celluloid and similar mate rials in flat sheets or panels by means of a screen, stencil, or other plates. It has particular reference to a machine for printing on flat sheets of glass, metal, cardboard, fibre veneer, wood and similar panels. The flat panels formed of the materials suggested are supplied with a design, trade-mark or other insignia which may be permanent, semi-permanent, or substantially so.

Another feature of the present invention involves the construction in a printing machine which allows the work sheets to be charged and discharged from an intermittently rotatable printing table in properly timed relation with the printing mechanism so as to produce an economical and practical design on the sheets to be printed.

Another feature of the present invention is to provide a machine which carries out the printing operation in properly timed relation with the movements of the printing table so that the design may be printed upon the sheets on each stroke of the reciprocating printing carriage.

Still another feature of the present invention is to provide automatic gripping abutments on the carrier table to release and grip the panels to be .printed so as to facilitate the charge and discharge of the panels to be printed with economy and dispatch.

A further feature of the present invention is to provide a machine having an adjustment for the stencil or screen so that various colors may be used in the same design without interfering with the registration of the outline of the de- Slgll.

Another feature of the present invention is to devise a machine that is automatic in the action of rotating the table and locking the said table in a predetermined position during the printing operation and in further providing a releasing means which releases the locking means to allow the table to revolve to the next succeeding printing station where the next panel is printed or coated.

Further objects of the invention are to provide a machine of the character referred to that is strong, compact and durable, thoroughly reliablefor its intended purpose, and comparatively inexpensive to manufacture and operate.

the invention consists of a novel construction, combination and arrangement of parts, as will be hereinafter more specifically described and illustrated in the accompanying drawings, and specifications wherein the preferred embodiment 5 of the invention is shown, but it is to be understood that changes, variations, and modifications may be resorted to without departing from the spirit of the claims hereunto appended.

In the drawings wherein like reference characters indicate like parts throughout the several views:

Fig. 1 is a top plan view of the machine constructed in accordance with the present invention, and showing a work sheet in raised position at the discharge station.

Fig. 2 is a side elevation thereof having parts broken away showing the printing carriage and stencil cradle in a central, longitudinal, vertical section.

Fig. 3 is a transverse sectional view taken substantially on the plane of line 33 of Fig. 1 and looking in the direction of the arrows.

Fig. 4 is a fragmentary perspective view of a portion of the printing carriage and the stencil cradle. 9

Fig. 5 is an exploded perspective view of the parts of the Geneva gear and the locking pawl which hold the outer disks in locked position during the printing operation.

Fig. 6 is a side elevation of the adjusting frame of the stencil cradle having certain parts thereof broken away and with the lower stencil frame and the printing carriage removed.

Fig. 7 is a top plan view of the same stencil cradle with certain parts broken away, andwith the lower stencil frame and printing carriage removed.

Fig. 8 is an enlarged top plan view of a portion of the carrier table with certain parts broken away and illustrating one of the automatic gripping abutments.

Fig. 9 is a vertical sectional view in detail of a portion of the carrier table showing the lifting plunger in retracted position priorto engaging the cam and raising the sheet at the discharge station.

Fig. 10 is a top plan view of a portion of the machine with certain parts removed and illustrating a modified form of the invention for lifting the printing cradle.

Fig. 11 is a side elevation of Fig. 10.

Fig. 12 is an enlarged detailed vertical section through the adjusting block and the end rail of the adjusting frame on the stencil cradle.

Fig. 13 is an exploded view showing the adjusting block and a portion of the end rail of the adjusting frame of the stencil cradle.

Fig. 14 is an enlarged central vertical sectiontaken through the outer adjusting block showing the bearing connection between the adjusting screw and the outer extension neck.

Referring to the drawings in detail, it will be seen that the machine of the present invention includes an intermittently rotating carrier table B supported on the base A. On the carrier table B are a plurality of printing stations on which the work sheets are supported. The work sheets are moved one after another into printing position. A metal stencil or a fabric screen carrying the design to be applied to the work sheet, carried by the stencil cradle G drops on the work sheet and the printing carriage F reciprocates back and forth over the stencil causing the coloring material to penetrate the stencil or stencil screen and deposit on the work sheet. It will be seen as the parts are described in detail, that the printing carriage F reciprocates in timed relation to the intermittent movement of the carrier table B. Likewise, the stencil cradle moves up and down in timed relation to the movements of the carrier table so that the work sheets or panels will not be smeared as would happen in the case if the carrier table moved while the stencil was contacting the work sheet.

The base A which supports the parts of the machine includes a. horizontal bed Ill supported on a plurality of legs ll. As the machine is designed for this explanation, the base is in the shape of a banjo or key and the bed I0 is flat. I prefer'to build the base A of steel using such structural shapes that I find most suitable for the purpose. Under what may be designated the handle portion of the bed I0 is a'horizontal platform 12 supported on cross beams [3, the ends of which are secured to adjacent legs Ii; while under the round part of the bed I0 is another platform l4 secured to the leg braces I5, the ends of the latter being secured to contiguous legs II. If desired, a sheet metal skirt l4 may be secured to the legs and form sides to enclose the base.

Anchored to platform I2 is a driving motor I6 and a housing l1"- which contains the reduction gears, the latter being driven by the shaft l3 from the motor. A drive shaft I! having a miter gear 13 and a sprocket wheel 23 fixed thereto extends from the side of gear housing "a. A

crank shaft is journalled in a pair of bearing blocks anchored to the bed Ill, and on the end of the crank shaft is fixed a sprocket wheel 22. Trained about the sprocket wheels 22 and 23 is a linked drive chain 23. On one end of a longitudinally extending shaft 24 is a miter gear 25 continuously meshing with gear [3, and the other end is journalled in a bearing on platform l4. The one end of the shaft 24 is journalled in a bearing on platform l2 and the shaft extends from one platform l2 to the other platform H.

The legs of a pedestal bearing 25 are bolted to platform l4. In the bearing 25 is iournalled the vertical shaft 25 on the upper end of which is fixedly mounted to rotate therewith an intermittently rotating circular work-carrying table B disposed on a horizontal plane above the bed l0. Table B is supported at the margins by ball bearing 2541 which is circular in configuration and the lower race thereof is mounted on bed Ill. On the lower end of shaft 26 is a gear 21 which meshes with a gear 23 on the one end of the shaft be presently described. The intermediate portion of shaft 23 is iournalled in a sleeve bearing 33 on one of the legs of the pedestal bearing 25.

On the carrier table B are a plurality of equidistantly spaced printing stations 3| and for the purpose of explaining the invention, five of such stations are illustrated and described. While the invention is adaptable to three or more stations, it has been found that five stations operate very efficiently in practice permitting discharge at one station D and loading at the next succeeding station E, while work in one of the three remaining intermediate stations is being operated upon by the printing mechanism to be described later. It is believed that a description of one printing 1 station 3| will give a clear understanding of the others since they are all the same.

For printing rectangular blank sheets 33, each station has one 'fixed fiat angular-shaped abutment 34 fastened on the table top 32, and another 2 automatically movable angular gripping abutment 35 both of which coact to grip the rectangular work sheet 33 at diagonally opposite corners. On the legs of the abutments 34 and 35 are yielding projections 36 which, as shown, consist of rub- 2 her knobs fastened to the legs. These yielding knobs center the work sheet 33 where the sheet is not cut to a true rectangle. It will be understood that where round or other polygonal-shaped work sheets 33 are to be printed, the abutments a 34 and 35 may be changed respectively to arcuate shape or angles of different sizes to grip the diagonally opposed edges of these particular conflgurations.

To permit movement of abutments 35, one leg is provided with a guide slot 31 to receive the shank of a headed guide 38 which is anchored in the top 32 of the table The edges at the ends of the legs of the abutments conform with and ride against the biased edges of guide projections 4 39 fixed to the table top by screws as shown in Fig 8. A guide pin 40 secured to the abutment 35 extends through a guide slot in table top 32 and the lower end is attached to one end of coil spring 4i. on the bottom of the table top. The other end 4 of spring 4| is secured to a screw 42 fastened against the bottom of the table top 32. At the outer vertex of each of the automatically movable abutments 35, and free of the edge of the table, is a depending cam pin 43 which retracts the 5 abutment automatically when it engages a cam piece 44 fixedly secured to the bed l0. There are two of these cam blocks 44 circumferentially spaced from each other at adjoining stations so as to retract the abutments 34 at two different consecutive positions of the stations, the one for discharge indicated at D, and the other indicated at E for charging the stations with work sheets 33. When assembled, the work sheets 33 rest on the fiat top 32 of the table B gripped between abutments 34, 35.

While I have shown anddescribed one way of holding the work sheet 33 to be printed, many other means of holding them are possible. For example, I may hold magnetically attracted work sheets by electro-magnets. Where the work sheets are limp, I may use suction to hold them on the printing stations. The manner of holding the sheets by suction and magnetism or combinations of both is revealed in my Patents 7 2,034,003, March 7, 1936, and 1,995,522, March 26,

, 1935, and need not be discussed in detail.

An automatic lift is provided to raise the work sheet atone station only which is the discharge station D. To accomplish this, a cam block 45 q movement of the crown piece.

5 one lifting plunger 46 mounted in each of the five stations, each of which consecutively raise the work sheet as shown in Fig. 2 at the discharge station D. A coil spring 41a encircles .the plunger and normally retracts it, when the plunger is not .0 engaged by cam block 45, by having one end hearing against the bearing sleeve 46a. A head on the upper end of the lifting plunger 46 prevents it from pulling through the table top under the tension of spring 41a. and this head seats flush 5 with the table top 32 in a countersink surrounding the bearing opening.

The printing on the blank work sheets 33 is accomplished by scraping and pushing over a stencil or screen a powder, liquid or plastic wave or gob of coloring material 6|a by a reciprocating flexible squeegee blade which slides over a stationary fabric screen or metal stencil 86 provided with the design or designs of one or more colors to be transferred. If screens are used, the design is pervious to the coloring matter, while if a stencil is used the design is cut'out, all of which is known in the art. To this end, a pair of parallel channeled track bars 41 are secured on blocks 46 which latter are fastened to the bed l6 0 of base A. The printing carriage F includes runner blocks 49, one for each' track bar 41 which reciprocate in the channels and are connected at one end by cross head 50. An-adjustable connecting rod 5|, provided with a turn-buckle ad- 5 justment 52, has one end pivoted to a. pair of bearing ears 53 in the center of cross head 50 and the other end of the connecting rod has a ring bearing journalled to a crank pin 54 which latter is adjustable in the bifurcated slotted 0 crank 55 of crank shaft 2|.

In addition to the runner blocks, the printing carriage F includes a transverse crown piece 56 yieldably supported by its ends on a pair of posts 51 anchored one in each of the runner blocks 49.

5 Surrounding each post is a coil spring 56 one end of which bears on the crown piece 56 and the other against a head on the terminal of the post. A limit stop 59 on each post.5'| abuts under the crown piece and prevents further downward The outer ends of the crown piece 56 also ride on strips 66, one being mounted on each side rail of the cradle frame 14a to be presently described and each strip 60 also forms a limit stop for the crown piece. The flexible squeegee blade 6|, preferably made of rubber, is secured on the bottom of a flat vertical metal shoe 62 having a shank formed with slots 63 which shank is secured in a slot 62a in crown piece 56 by means of bolts 64. The bolts are slidable in a transverse slot 65 in crown piece 56 and thus the squeegee is adjustable vertically and transversely. To transfer the wave or bank of coloring matter 6|a used for printing from one side to the other of the squeegee blade 6|, it is necessary to raise the squeegee and step it up over the wave or gob at the end of each stroke. To do this, a pair of cam fingers dis-' posed side by side and swingable in a limited arc and indicated 66 and 61 (see Fig. 4) are pivoted at 63 to'a bracket 66, secured by bolts 16 to the crown piece- 56, there being one bracket and a pair of cams near each end of the crown piece. The cam 66 rolls up a cam block ll fixed to track bar 41. Cam finger 61, the inner one, clears cam II but rolls up cam block 12 fixed to track bar 41, the two cam blocks being offset transversely and being secured on frame 14a at the opposite ends of the stroke of the printing carriage F. The

cam fingers 66 and 61 are of substantially segmental shape with the arcuate edges oppositely disposed so as to roll over the cam blocks while the crown piece 66 is being elevated and transferred fromone side to the other of the gobof coloring matter.

The stencil or screen cradle G consists of an adjusting and supporting top frame 14a for the lower rectangular horizontally disposed screen or stencil frame 13. The top frame is also rectangular in configuration and is horizontally disposed. On each end rail 14 of frame 14a for some distance intermediate the ends is an upstanding tongue 15 which seats in a counter groove in the bottom of an adjusting block I5 which slides transversely across the frame on the and rail as a base, there being one block for each rail.

Through a slot in the end rail, there depends from block 16, a threaded collar 11 which, engages and coacts with the threaded shaft 16 journalled in the end rail. A hand wheel 19 on the outer pro-- jecting end of shaft "provides for turning the shaft and adjusting the block 16 transversely of the frame. Threaded in an opening in outer block 16 and extending longitudinally of the frame, is a screw 66 turned by a hand wheel 80a on its, outer end. The inner end of this screw has a reduced portion 6| and a head 6|a adjoining the reduced portion. A pair of angular extension necks 62a have the lower ends of the vertical legs 62 thereof secured to the end rails of the lower stencil frame 13. In the vertical leg 62 of .the outer extension neck 62a, there is a round opening 82b which forms a journal for the reduced part 8| of the screw 66, and the head 6|a bears against the inner face of the leg as shown in Fig. 14. The horizontal legs 63 of each extension neck overlap the top of each of the blocks 16 and are bolted thereto by the bolts 64 which seat in slots 85 in the horizontal legs to permit the stencil frame 13 to be adjusted longitudinally of the supporting frame 14a by the hand wheel 66a when the bolts are loosened. It will thus be seen that the stencil frame 13, to the bottom face of which is secured the stencil or screen 66, may be adjusted longitudinally by turning hand wheel 66a, or may be adjusted transversely by turning the shafts 16, when the bolts 64 are loosened from their normally tightened relation, all of which permits change of position of screens and stencils and re-registration of the motif or design for applying different colors to different parts of the design.

To prevent smearing of the printed design on the work sheet 33 after it is printed and asthe carrier table B rotates, it is necessary to provide a means to raise the stencil or screen cradle G while the table moves. I have shown one form of structure for accomplishing this purpose in Figs. 1, 2 and 3, 6 and '7 and another form in Figs. and 11. In both forms of the invention, the adjusting frame 14a is supported on four elevating pillars arranged near the corners of the adjusting frame 14a, whereby the frame 14a holding the stencil frame I3 together with the stencil or screen are raised bodily free of the work sheet 33 at the printing station when the carrier table B intermittently rotates.

Toward this end I mount the adjusting frame side rails near the corners. A pair of yokes are bolted at 90 to the outside of each track bar 41, and in the legs 91 of the yokes are slidably mounted intermediate portions of cam shafts 98, there being one cam shaft on each side of the frame 14a. On the cam shaft 98, within the confines of the legs 91 of each yoke is a cam spool 93 which moves with the shaft. The lower ends of the pillars 94 extend slidably through openings in the crowns I of the yokes and bear on the cam spools 99. As the cam shafts 98 move back and forth, the pillars raise the printing cradle in cluding frame 14a and the stencil frame together with the stencil up and down in timed relation to the intermittent rotation of carrier table B.

To move the cam shaft 98, there are depending arms IN on each end of the cross head 50 and these arms slide on the end portion of the shaft within the limits of adjustable stop collars I02, I03 carried on the shaft. To retain the cam shaft at rest while the arms IOI slide from one collar I02 to the other collar I03 during-the reciprocation of the carriage F, a stop collar I04 is fixed to the shaft 98 between the confronting legs 91 of adjacent yokes. A pair of springs I05, I06 encircle the shaft and have their opposite ends bearing on the confronting legs 91 of adjacent yokes and their confronting ends bearing against the collar I04.

What is termed a Geneva gear C controls the movement of the carrier table B and the latching and releasing thereof in timed relation to the reciprocation of the printing carriage F and the raising and lowering of the stencil cradle G. The Geneva gear includes a pair of spaced disks I01, I08 which are keyed to the shaft 29. Between the disks is an idler disk I09 which rotates on shaft 23, and all the disks are of the same diameter. A chain drive I I0 is trained about a sprocket III on shaft 24 and over the idler disk I09 so the chain can move continuously.

Since the invention has been described and illustrated with a machine utilizing five stations 3| on the carrier table B, it is necessary to release and latch the table five consecutive times in one revolution or rotation. To do this, there are five keeper sleeves II2 depending from the top of table B. A latch pin II3 slides in asleeve II4 secured to bed I0 of base A. A latch pin actuating arm H is pivoted in the center at IIO to a vertical bracket II1 secured at its upper end to bed I0. One end of the actuating arm H5 is swivelled in a slot in the lower end of latch pin III while the other end has the upper end of link IIO pivoted thereto as at 8'. The arm H5 is forced down at the outer end by a spring IIO, thereby normally urging latch pin II 3 in latched projected position when keeper sleeve II2 registers with the position of the latch pin. The leading edge of the latch pin is bevelled at II3a so that it will be retracted when the edge of keeper sleeve I I2 rotating with table B, strikes the bevel after which it will snap into latched position and remain there until released by the action of the Geneva gear C.

There are four equi-distantly spaced cam blocks I20 fixed to the chain IIO. One end of an elongated pawl I2I is pivoted to bracket H1, and the other end which is free, seats or latches in keeper notches in disk I00 to be presently described. On the side of pawl I2I next to the chain H0 is mounted a roller I22 which extends over the chain and is engaged at predetermined times by each of the four cam blocks 0.. The lower end of link H3 is forked, and this forked end straddles the intermediate portion of pawl I2I to which it is pivoted, as indicated at I2I.

There are four sector-shaped cleats I23 equidistantly spaced around the periphery of each of the disks I01 and I00 that turn with shaft 20. The cleats on disk I01 are aligned with the cleats on disk I08 making four pairs of aligned cleats I23. The pairs of cleats I23 are consecutively engaged and disengaged by one of four equi-distantly spaced laterally projecting pins I24 fixed tov chain I I0 and one pin grips one pair of cleats I23 at a time and turns the disks I01, I08 one-fourth of a revolution. It will be seen that one pin grips the one pair of cleats at a plane tangent to the vertical diameter of the disks, then turns the disk a quarter turn and is released by the cleats on a plane tangent to the horizontal diameter of the disks.

Around the periphery of disk I00 are four equidistantly spaced keeper notches I25 which receive the free end of pawl I2I when the notches are brought into registration with the end of the pawl by the turning of the disks I01, I08 under the action of chain H0. The spring II9 which maintains the latch pin in projected relation, also urges the free end of pawl I2I into the keeper notches I24 and while the disks are tuming the free end of the pawl rides on the periphery of disk I08 until it snaps into the latched position.

When the cam block I20, engages roller I22 on the pawl I2 I, it passes under the roller and forces the pawl upwardly. This action causes pawl to release from its keeper notch I25 and at the same time forces latch pin II3 out of the keeper sleeve II2. After a momentary delay while the pawl I2I and pin II3 move, the pin I24 on chain I I0 grips the pair of aligned cleats I23 and turns the disks I01I08 one-fourth of a revolution, and this motion is so proportioned as to turn the carrier table B one-fifth of a revolution. The arrangement of the pins I24 with respect to the cams I20 on the chain, provide for release of the latch pin H3 and the pawl I2I in properly timed relation just prior to the time one of the pins grip the cleats I23 and turn the table B. The pawl I2I locks the outer disks I01-I08 to insure no motion is imparted to shaft 23 while the center disk I03 turns with the continuously moving chain 0.

It will be seen that while the chain travels over the idle disk I09 without any of pins I24 engaged with the pairs of aligned sector-shaped cleats I23 on disks I01I08, the disks I'll-I08 are latched against rotation by pawl I2I being seated in keeper notch I25 in outer disk I00. At the same time, latch pin II3 will be seated in the keeper sleeve II2 thereby preventing the carrier table B from turning. During the same time, the carriage F will be-scraping the coloring material across the stencil or screen 00. Just before the table'B is unlatched, and the disks I01--I08 are unlatched, the carriage F shall have completed a stroke in one direction and will be raised as heretofore described in order to move to the other side of the gob of coloring material. Simultaneously with the raising action of printing carriage F, the stencil cradle G also raises. While both the carriage F and cradle G are raised, the cam block I20 on chain IIO contacts roller I22 and unlatches carrier table B, and simultaneously the free end of the pawl I2I is forced out of the keeper notch I25 on disk I08 stencil sheet will be elevated free of the work the pin I24, after a momentary delay, moves against the straight face of the aligned cams I23. When the disks I8'II88 have been revolved a quarter of a turn, the movement turns carrier table A one-fifth of a revolution, and at the end of the quarter turn, pin I24 frees itself from cams I23 allowing chain H8 to move over the idle disk I08. At about the time the pin I24 frees itself, the next keeper sleeve H2 is latched by the pin H3, and the pawl l2l drops into the next succeeding notch I25 whereby bothj table B and the disks "ll-I88 are latched. At the time the table and disks latch, the printing carriage F will have passed over the gob of coloring material and dropped on the remote side ready to begin the return stroke, and simultaneously the cradle G carrying the stencil drops from its raised position while the table B is at rest.

To maintain the proper tension on the chain IIII, adjacent the lower segment of the disks, an

angular shoe I28 is anchored to platform I4. On

the vertical leg of the shoe, there is a collar I26a in which is slidably mounted the plunger I21, and on the end is journalled a roller I28 which presses against chain III). A spring I28 presses against the roller mounting at one end and the collar I26 at the other end to provide tension. on the chain IIO. To adjust the tension on plunger I21, the outer end is screw-threaded to receive a nut I38 which bears against collar I26a. On the horizontal leg of shoe I26 is a forked extension I28b wide enough for the chain III! with the cams I28 and pins I24 mounted thereon, to pass through, and journalled in this extension is the idle sprocket wheel I26c about which the chain III) is trained.

It has been found necessary to maintain a pressure against chain III] by the yielding roller I28 suflicient to retain pin I24 in gripping relation with cleats I23 near the end of the stroke to prevent the pin from becoming disengaged from the cleats. The tension of spring I28 insures that the pin shall remain engaged with the cleats I23 until pawl I2I drops into the succeeding notch I25 on disk I88, at which time disks III'II88 come to a sudden stop. When the sudden stop occurs, there is a certain lash or whip made in the chain H0, and the whip causes roller I28 to be depressed, and at the same time permits pin I24 to jump free of the cleats I23. The roller I28, therefore, assures that pawl I 2| will always become locked in notch I25.-

In the form of the invention shown in Figs. 10 and 11, there are cam blocks 81 and 88 at each end of each of the sliding carriage runner blocks 48'. In this form of the invention shown in Figs. 10 and 11, the ends of carriage runner blocks 48' adjacent the carrier table B are secured together by the cross bar 50a. Except for elevating the frame 'I4a' at certain timed points, it is stationary. The frame 14a is free to slide up and down on four elevating pillars 88 situated near the corners, the lower ends of which are anchored in the track bars 41'. Between the upper face of the track bars and the lower face of frame 14a surrounding a portion of pillars 88 are buffer rings 88' which form limit stops. The upper ends of the pillars extend above frame 14a and there is a coil spring 88 surrounding the projecting portion of each pillar, one end of which bears on the heads of the pillar and the other ends bear on the top of the frame. .It will be seen that at the proper timed relation, the stencil cradle G including the supporting frame 14a carrying the sheet in the printing station when the carrier table B is moving and this occurs when the cam fingers to be presently described are engagedby' cam blocks 81 and 88 on the ends of sliding runner blocks 48' at each end of the stroke of the printing carriage.

In the form of the invention shown in Figs.

and 11, there is a pair of depending cams 8|, 82

on each end rail I4 which ,are pivotally mounted to movein a limited arc in bracket 83. The brackets are secured to each end rail -'I4' near each corner including two on each end rail and one near each corner. The pair of cam fingers 8|, 82 on one end rail I4 roll up the cams 81 at one end of the runner blocks 48' and lift the frame 14a together with stencil sheet free of the work sheets at the end of the stroke of the printing carriage in one direction. Although the frame 14a will be lifted at an angle, the openings in the frame around pillars 88 being of such shape to provide for angular disposition, the angular displacement of the stencil sheet will be such as to clear the work sheet 33 and the abutments34 and 35 on the carrier table B. The pair of cam fingers 8I, 82 on the other end rail I4 of frame 14a roll over cam blocks 88 on the adjacent ends of the runner blocks 41 when the printing carriage F reaches the end of its stroke in the oppositedirection thereby raising the frame 14a carrying the stencil sheet free of the work sheet 33 although the frame 'I-4a' is disposed at an angle as described heretofore.

Having thus described my invention, what I claim as new is:

1. A printing machine comprising in combination, a table mounted for rotation about a vertical axis and having a plurality of radially disposed stations thereon, upon each of which work to be printed is adaptedto be supported, means for with, a stencil mounted on the guide over the table for vertical movement, said stencil being adapted to be moved downwardly and upwardly between. each rotary movement of the table, a slide reciprocated on the guide, and a squeegee carried by the slide in contact with the stencil.

2. A printing machine comprising the combination set forth in claim 1, wherein means operated by the slide movement imparts vertical movement to the stencil.

3. A printing machine comprising in combina-- tion, a table mounted for rotation about a vertical axis and having a plurality of radially disposed stations thereon, upon each of which work to be printed is adapted to be supported, means for imparting intermittent rotation to the table, a guide extending over the table and parallel therewith, a stencil frame mounted thereon for vertical movement, pillars depending from said frame, cams on which said pillars rest, a slide, means for reciprocating the slide, means coacting with said slide for moving said cams and raising said stencil frame, a stencil carried by the frame, and a squeegee carried by the slide for reciprocation over the stencil.

4. A printing machine comprising the combination set forth in claim 3 wherein the cams are tion. a table mounted for intermittent rotation about a vertical axis, said table having a plurality of stations thereon, upon each of which work to be printed is adapted to be supported. a guide extending substantially radially over a portion of said table and projecting laterally therefrom, a stencil mounted for vertical movement on the guide, each station on the table in turn being adapted to be positioned beneath the stencil, a slide movable horizontally on the de, means for reciprocating said slide through variable lengths of stroke, a squeegee on said stencil reciprocated by the slide movement, and means actuated by the slide movement for raising the stencil and squeegee as the latter approaches either extrem ity of its stroke. a

6. A printing machine comprising in combination, a table mounted for intermittent rotation about a vertical axis having a plurality of radially disposed stations thereon, upon each of which work to be printed is adapted to be supported, a guide extending over a portion of said table and parallel therewith, a stencil frame mounted on the guide for vertical movement, a stencil in said frame, a slide mounted for reciprocation on the guide, a squeegee bearing on the stencil and reciprocated thereover by the slide, downwardly projecting pillars on the frame, cams mounted for sliding movement parallel with the slide, means for holding said cams in spaced relation, portions of said slide being adapted to contact said cams andmove them as the slide approaches each extremity of its stroke to raise the pillars on said cams, and means for returning the cams to the positions whereby the pillars arerin lowered position as said slide commences its next stroke and said slide portions disengage said cams.

7. A sheet printing machine comprising a movable work-carrying table, a panel member having portions pervious and impervious to coloring material, a movable member effective for the major portion of its movement to sweep coloring material over the panel member and transfer said material to the work on the table through the pervious portions of the panel, said table and movable member travelling in substantially plane paths, power means connected with the table to move the same, power means connected with the movable member to move the same, and cam means actuated by the movable member and coacting with means suspended from the panel member whereby the panel is moved angularly with respect to the paths of the table and movable member.

8. A .sheet printing machine comprising a movable work-carrying table, a panel member having portions pervious and impervious to coloring material, a movable member effective for the major portion of its movement to sweep coloring material over the panel member and transfer said material to the work on the table through the pervious portions of the panel, said table and movable member travelling in substantially plane paths, power means connected with the table to move the same, power means connected with the movable member to move the same, means carried by the movable member and actuated during the movement thereof to alter the plane path of movement of the movable member, and means actuated by the last mentioned power means and coacting with means on the panel member whereby the panel member. is moved angularly with respect to the paths of the table and movable member,

9. A sheet printing machine comprising a movable work-carrying table, a panel member having portions pervious and impervious to coloring material, a movable member eifective for the major portion of its movement to sweep coloring material over the panel member and transfer said material to the work on the table through the pervious portions of'the panel, said table and movable member travelling in substantially plane paths, power means connected with the table to move the same, control means associated with the power means to provide rest periods in the movement of the table, a latching member coacting with the table to secure the same in position during the rest period, and means actuated by the control means to effect the engagement and release of the latching member with and from the table respectively.

10. A sheet printing machine comprising a work table having more than one work' station, said work table mounted to rotate in a plane, power means operatively connected to the table to rotate said table, a control device operatively connected with said power means between said power means and said table to provide inter- I mittent rest periods in the rotation of the table,

a panel having one part pervious and another part impervious to coloring material, said panel being disposed over one work station on the table, a reciprocating member wipingly engaging the panel in both directions to sweep a wave of coloring material back and forth over the panel to transfer the coloring material to the work on said one work station, power means connected with said member for reciprocating the same, means actuated by the last'mentioned power means and coacting with the panel to move the latter into and out of engagement with the said one work station during the rest period of the table, and automatic means engageable with said member to cause said member to step over the wave of coloring material at the end of each stroke and during the rest period of the table.

11. A sheet printing machine comprising a work table mounted to rotate in a plane, said work table having more than one work station, means on the table for holding the work in stationary position while it is being operated upon, drive means to' rotate the table, a control device connected with the drive means to provide intermittent rest periods in the rotation of the table, a panel member having one part pervious and another part impervious to coloring material, said panel member disposed over one work station of the table, a scraping member wipingly engaging with said panel member, drive means to reciprocate one member to sweep a wave of coloring material in both directions over the panel member and transfer the coloring material through the pervious portion to the stationary work during the rest period of the table, means actuated by the last mentioned driving means and coacting with the panel member tocause the members to separate and allow the wave of coloring material to be transferred from one side to the other of the scraping member at the end of each stroke and during the rest period of the table.

FREDERICK SHURLEY.

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