US1919954A

US1919954A - Printing machine

Info

Publication number: US1919954A
Application number: US434694A
Authority: US
Inventors: Kranz Curtis George
Original assignee: Individual
Current assignee: Addressograph Co
Priority date: 1930-03-10
Filing date: 1930-03-10
Publication date: 1933-07-25
Anticipated expiration: 1950-07-25

Description

Ju1y25,-1933. c. G. mm; 1,919,954

PRINTING MAclNE y F11-ed Maren io. 1930 'r sheets-sheep 1 l 117 Jaa zia z 626'@ 9 3J ya 256 7 July 25, 1933. c.' G. KRAN: 1,919,954

' PRINTING MACHINE Filed March 1o, 195o i 7 sheets-sheet 2 I 2)* u HIJlnfLfZ/Z July 25, 1933-. cQ G. KRANz PRINTING MACHINE Fileduarcn 1o, 195o 7 sgeets-sneet 4l "C. G. KRANZ PRINTING r.u.\.cHI NEA July 25, 1933.

Filed Maron 1o, 1930l I 7 Sheets-Sheet 5 NW l IT.

juy 25, 1933. c. KRANz I PRINTING MACHINE Filed March l0, 1930 7 sheets-snelst 6 Su h G w@ www NNN NNN www u 115511151 ,H.

july 25, E933. c. G. KRANZ PRINTING MACHINE 7 Sheets-Sheet 7 Filed March' lO, 1930 fuif-fafa? .Baa 25,1933

CUE'rIs GEoRGE III-tanz.' oF CHICAGO, ILLINOIS, AssIGNon To AnDEmsoGRAPHCoM- EANY, oF CHICAGO, ILLINOIS, A c oEPoEATIoN or DELAWARE rlanwrne MACHINE Application led March 10,

This invention relates' to printing ma-y 'chinesand one of the important objects is to provide a machine which may be advantageously employed in the printing of factory production forms,` value tables on .in. surance policies, and the like. For example, the value tables on insurance policies vary on different policies, usually in accordance with the attained age of the insured. The custom has been to print these policies in manydifferent forms in order to accommodate the above condition, but'it is manifest that this entailed many disadvantages. Since the policies are standard other than -the value tables, it is possible to print but rone form if these tables are omitted and then by later adding these tables this 'form will be `adaptable for all policies. In order that these tables `may later be printed in accordance with the specific requirements of each policy the tables for the diierent policiesl may be arranged on suitable printingv devices, which may be filed in the usual manner, and then selected and employed to, print -the tables. Similar conditions are encountered in the printing of factory production forms and other analogous prlnted matter Where a limited number of impressions are taken from a printing device at a given time but wherein the operation is repeated at ir' regular intervals. This requires frequent changingvoi the printing 4devices and 1t 1s' among the objects of the invention to pro vide a printing machine in which this changing of the printing device may be expeditiously accomplished.

. Further` objects of theinvention are1toprovidea printing machineV wherein theimpression will be uniform throughout the printing area;- the effective stroke of the printing mechanisms may be varied the im-V pression receiving lsheet will be securely clamped during the printing operation and` 5, to provide a machine thatwill be prevented from operation until' the printing device-isv v properly and securely positioned.y

` A selected embodiment of the invention is shown in' the accompanying drawings, A and therein:

\ phantom 1930. Serial No. 434,894.

Fig. 1 is a side elevational view 'of the machine;

Fig` 2 is a rear elevational view of the machine; v

Fig. 3 is a sectional view taken substan-v 55 tially .on the line 3--3 of Fig. 2 showing the parts in inoperative position;

Fig. 4 is a View similar to Fig. showing the parts in operative position;

Fig. 5 is a sectional view taken substan- 60 tially on theI line --of Fig. 4; Y

Fig. 5a is a sectional view taken substantially on the line 5er-5a" on Fig. 5 and wherein the supporting shaft is shown in Fig. 5b is an end view taken` on the line 5b-5b' on Fig. 5;

Fig. 6 is a plan View; Fig. 7 is a detail view of an eccentric arrangementemployed in the device; and

Fig. 8 is a sectional detailvview taken substantially on the ,line 8 8 of Fig. 4.

Referring to the drawings, 1 indicates the frame of the machine and mounted thereon is a motor 2 having a pulleyvon the 75 shaft thereof. A belt 4 is directed around the pulley Sand around a pulley 5 mounted on the shaft 6 journaled in

bearings

7, 7 in the frame 1. A bearing bracket 8, Figs. 2

substantially -and 3, has

bearings

9, 9, mounted on the so -ley 5.. A collar 14, which may lbe a hub on lthe gear 12 has notches 15 in the periphery thereef. A pawl 16, Fig. 3,v is pivotally mounted on a lug 17 extending from the collar 18, 2, fixed on the shaft 11. A ro- 9o jection. 19 onthe pawl 1 6 adapted to t inv 'the notches 15 andis ur ed toward said notches by. a spring 20. A projection 21 extends from the bearing bracket 8 and an arm 22' is pivotally connected to the free 95 endo thereof. The arm'22 has a/s'pring v23 connected thereto which urgessaid arm upwardly into engagement with the stop 24 on the frame 1. The heel "25 of the pawl 16 engages a shoulder 26 on the arm 22" when 10o i the arm is in engagement with the stop 24 and holds the projection 19 out of. the notches 15. L foot treadle 27,.Fig. 1, is pivotally mounted on the frame. A rod 28 interconnects the foot treadle 27 and the arm 22.. When the treadle 27 is depressed the shoulder 26 is retracted from engagement with the heel 25 and the spring 20 urges the projection 19 toward the collar, 14 and into one of the notches 15 thereby connecting the shaft 11 with the rotating collar 14. An 'arm' 29 has a split end portion 30., Fig. 4, and a bolt 31 extends, across this split end portion and securely clamps the arm 29 'on the shaft 11. Ar roller 32 is.

.mounted on the free end of the arm 29 and is disposed between the

guides

33, 33 on the depending arm 34 of the main operating member 35, which includes the

arms

36, 36, Fig. 2, pivotally mounted on 'the shaft 6. When the' shaft 11 is rotated upon connection with the collar 14 the arm 29 maires a complete revolutionl and oscillates the main operating member 35 about the shaft 6. lf the foot treadle 27 is released after the projection 19 is engaged in a notch 15 'the heel 25 will strike the shoulder 26, and :thus disengage the projection 19 from the notch- 15, after a complete revolution, but if the foot treadle is held depressed the machine will continue to operate.

A supporting structure 37, Fig.5, extends transversely across the frame 1, and substantially midway between the sides .of the frame a table 38 is mounted on this sup-

Guides

39, 39 project' porting structure. from the upper edgeof the table 38 and inn clude Hanges 40, 40 which it in recesses in the printing bed 41 slidably mounted on and between the guides 39y and on the table 38. A bearing sleeve 42 depends from the midsection of the tablev 38 anda rod 43 is journaled therein. A handle 44 is fixed on the 'outer end of the rod 43 and includes a hook shaped end 45, Fig. 2. A stud 46, Fig.- 4, ismountedy in the front edge of the printjing bed 41. The handle 44 andthe rod 43 may be turned into vertical `position toengage the hooked end 45 about the stud 46 and, when so engaged, the handle may be employed to move the printing bed 41 from vthe position of Fig. 4 into the position of may be turned to disengage the hook end 45 e from the stud 46. YAs soon as .the handle44 is so turned the keyway 47 will be moved :terasse from alinement with the screw 48 and, therefore, the handle and the rod cannot be moved forwardly by reason of the engagement of the screw 48 in the groove 49. This insures the proper positioning of the printing bed in printing position. .4t the vinner end of the hearing sleeve 42 a stud shaft 50 is secured whichhas a groove 51, Fig. 8,- in the periphery thereof into which any ap roved retaining device 52 is extended whicl prevents displacement of the stud shaft from the sleeve 42.V A projection 53, Fig. 3, is formed on the inner end of the stud shaft 50 which seats in a notch 54 at the inner end of the rod 43 when said rod is moved to its inner position, Fig..4, to aline the groove 49 with the screw 48. lt is manifest that the rod 43 cannot: be rotated unless' the groove 49 is alined with the screw 48 as the screw 48 will extend' into the keyway 47 at all other times, and since connection will not be established between the stud shaft 50 and the-rod 43 until the groove and screw are alined it is manifest that the stud shaft 50 cannot he rotated until projection 53 seats yin notch 54 the printing bed 41 is properly positioned in printing position. 0n the stud shaft 5() is a peripheral cam 55, Figs. 2, 5

and 8, having a lug 56 extending from the periphery thereof to which one end of a.

link 57 is pvotally connected. The other end of the link 57 is connected to the enlarged end portion 58 of the rod 59. A plate 60, Fig. 8, has a keyhole slot 61 therein.

When the groove 49, keyway 47, and the screw 48 are alined, at which time the hook end 45 may engage the stud 46, the enlarged end portion 58 of the rod 59 will be disposed over the reduced section of the keyhole'slot 61. However, when the rod 43 is rotated in a clockwise direction to move the keyway out of alinement with the screw, the enlarged portion 58 will be moved into alinement with the enlarged section of theslot 61 through which this enlarged portion is free to pass, said portion being larger than the restricted section of the opening 61. rlhe loc rod 59'is pivotally connected to the extension 62, Fig. 1, of the arm 22 and when said arm 22 is engaging the stop 24 the lower end of the enlarged portion 58 willbe'disposed above the upper surface of the pla-te 60. When the portion 58 is alined with the enlarged section of the opening-61 the foot treadle 27 may be depressed, as the portion 58 may freely pass through the enlarged section of the opening. However, when the,

enlarged por-tion 58 -is disposed above the restricted section of the opening 61, in which position it'will be when the screw 48 is in or xalined with the keyway 47, the foot treadle 27 will be held against dcpressionby the engagement of the lower end of enlarged portion 58- with the upper surface of the plate 60. It is, therefore, apparent that the misses machine cannot be set in operation until the ing ail opening 79 therein above printing printing bed 41 is properly located in printposition, that is, above the printing device ingposition'. 71 'when said printing device is arranged The printing bed 4i has a rabbeted groove in printing'positiomf". The shield 80 has de- 5 63, Fig. 5, along one upper edge thereof in pending lips 81 which extend through open- 701 which a block 64Ais Vfitted. A plate 65 is ings 81 in the plate 78 and in this manner secured on the upper surface of the block the shield 80 is removably supported in posi- 64, by screws .66, and projects'in'wardly overtion. The shield 80 has openings therein the upper surface of the printing bed in alined with the rinting characters on the spaced relation therewith. Along the opprintin device l and' this shield will be 75 vposite lateral edge of .the printing bed 41 Change in accordance with printing oharaca plate 67 is secured by `screwsr 68 and a ter location variatlons in the printing depplate 69 at the upper edge of the plate 67 Ylces, sald shield being readily removable 3S. projects over the upper surface ofthe print- 1t 1S -retalned 1n 'position onlyby the extening bed in spaced relation therewith. At SiOn 0f the lips 81 through the openings 81'. 80

the inner or rear end of the printing bed AS SlIOWn beSt in 3 and 4,'a bar 76 41 a plate 70, Fig. 3, is secured, a portion ertends thIOugh the 'rlb 76 and throu h the of which projects abovethe. upper surfacel 11b75fyextellded arallel t0 and Space fIOm of the printing bed. A printing device 71, the rlb 76, the orward end of which bar which may be a metallic plate Having type 76 serves as a stop for the rear end of the erry characters embossed thereon as,for example, printing bed 41 to properly locate this bed) one of the ype disclosed in Patent No.' 1n llnlillg POSIIO t 1,543,066 ne 23, 1925, is positioned on the earwardly of the opening 79 1n the plate Aupper surface of the printing jbed 41 with '78 are SlOtS 82, 82. ReSlllent fingers 83, .83

opposite transverse edges of; the devicedishave tall portions 84 secured ltol the plate 90 posed below the portions of the plates 65 78 and alsn lnclud portlons whlchextend. and 69 that project overl the printing bed-41, 1,1 190 the Slotf 82 W1th a downward 111011118- y these plates being spaced from the rinting tlOIljmd Wh 10l1 telmlQIl-te 1n Vertlcallyfexbed suiiicienty to permit the snug tting of telldlllg pOItIOIIS 85, FlgS- 3 alldfl, that have 33. theprinting eViCe 71 thepebelow, The rear at upper ends thereof Clamping \86. 9.5

edge of the printing device 71 abuts the The Clamlin4 1iPS 8 6 Se1`V0-t0 Secufe the plate 70. It is, therefore, apparent that heel? t0 be PI'1I1ted 111 engagement with adthe printing device 71 is securely retained on JeCeIltpOrtlOnS of the p late 78 and thus this the printingbed 41. In order to install the sheet v1s clamped 1n position. The clamping printing device 71 the printing, bed 41 is action occurs after thezplate 78 has'been low- 10o moved into a forward position substantially ered Wlth the SllppOItlIlg frame 7 Sand this 4similar to that indicated in Figp3, this -being 1S aCCOmpllShed in thefollOWing manner: carried out in themanner set forth above. v Journaled 1n dependmg flanges of the After the printingdevice has beeninstalled SUPPOTtlIlg frame 73 and extending there- 3 on the' printing bed 41, the printing bed is across is a bar '8.7, Figs. 3 and 8, which has 105 then moved into printing position depicted gthe intermediate pOltOIl tlleIeOf disposed in F ig.4 in the manner previouslydesgribed.v Abelw the

ingers

83, 83 cut away to provide In the frame 1 bearings 72, 72, Fig. 8, are a dlametricallv extending flat portion 88. "provided" The shield supporting frame 73 At 011e end' 0f the bar 87 is an upwardly hasbearings 74, 74, Fig, 8, A rod 75 is exprojecting linger 89, A pin 90 extends radiim I y frame above the peripheral cam 55 and is endepicted in Fig. v3, it engages the tended through the bearings 72, 72 and. 74, 'a1-1y from the ar 87 and one end of a spring 74 and,in'this manner, the shield supportin 91 1s connected'thereto. `The other end of' frame is pivotally supported i-n'posltion. the Sprlng 91 V1s connected to theJ rib 476.f rib 76 depends from the Vshield supporting When the platen 1s 1n rearward giosition,

nger89 H5 gaged by 'a rise 7 Fig. 5, on said cani at the and holds it in the position shown in Fig. timefthe, stud shaft' -50 is arranged inthe 3 wherein the spring 91 is tensioned When position shown in Fig. 3,at :which time thev the platen moves-forward to perform a screw 4'8'wi11 either bealined with or dis- .prmtlngoperatiom aS set forth hereinafter, Y

-posed in the keyway 47. \Whenthe printing l1t disengages the finger 89 and, therefore, 120

'36" the rise 77 will disengage the rib 76 which 83. are engaging b ed is disposed in printing position and the ,the `Spring. 91 acts to rotate the bar 87.,v

-rod 43 is turned to lmove the keyway- 47 out When the finger 89 is in the rearward posiof alinement with'the screw 48, the shaft tion shown :'in Fig.,3the'downward1y.ex-

50 will be turned as well as the cam 55 and 4tending resilient 1portions of the fingers 83,

l t e periphery of-theiroundwill permit the shield supporting frame to ed section of the bar 87, but when the bar pivot, downwardl into lthe position :illusis moved inthe manner/set forth these portrated\n Fig. 4, ounted on the forwardly tions of the fingers engagethe flattened porextending Yarms K01E the shield sup orting vtion 88'which lowers these fingers and, there-,JV

c5 frame 73 is a shield supportingplate7- llavfore, the-portionsr86 thereof will effectively 13e clamp the sheet 92 that is to beprinted.

This sheet will be held in position over the shieid 80e The mechanisms for operating the platen to cause the printing operations will now be described.

@n each side of the printing bed 41 on the frame 1 are

horizontal plates

96, 96, Figi 5, providing work supporting tables.v "Projecting upwardly and forwardly from lo the rear end of the frame 1, inwardly of the

plates

96, 96, are the

platen arms

97 and 98 lthe forwardly projecting portions ofwhich are spaced from the

plates

96, 96 and have bearings 99 and 100 at their ends; A shaft 101 is journaled in bearings 102 vand 103, Fig. 6, in the

platen arms

97 and 98, in thev portions of said arms above the ends connected to the frame. rll`he platen support, generally indicated by 104, is mounted on the shaft 101 for pivotal movement in a direction toward and away Jfrom the printingldevice 71. The platen support 104 includes

bars

105 and 106 which extend forwardly from the shaft 101 parallel to the 95

platen arms

97 and 98. Mounted in the bars 105and 106 adjacent the forward end thereof is a shaft 107, Figs. 3 and 4. The toggle members 108 and :109 are secured tol the shaft 107 adjacent the

bars

105 and 106,

-Figs 3 and 5. The lower ends of the togle y members 108 and 109 are interconnected a rod k110. The upper ends of the toggle` members 108 and 109 are interconnected by a rod 111. Toggle members '112 and 113 have the lower ends thereof pivotally mounted on the rod 111, inwardly of, and juxtaposed to, .the upper endspof the toggle members 108 and 109. The bearing portions 114 and 115 of the" toggle members 112 and 113 have the shaft 116 journaled therein. At thel ends of the shaft 116 are eccentric studs 117 and 118, respectively journaled in bearing sleeves' 119 and 120 which, in turn, are journaled in the bearings 99 and 100. 0n the outer ends of the bearing sleeves 119 and 120 are

gears

121 and 122. Atthe ends of the .shaft 101 studs similar to the studs 117 and 118 are provided which fare journaled in sleeves similar to the sleeves 119 and 120 and these sleeves have gears. 123 and 124 thereon similar to the gea-

rs

121 and 122. At the lower endsg of the bars 105 and `106 are

cam plates

125 and 126 which include portions extended beyond the outer faces of the

bars

105 and 106 to provide ledges. A frame generally indicated by 127, Figs. 3 and 4, vincludes cross braces 128 and 129 and at the rear end has

bearings

130, 130,in which a shaft 131 is e0 journaled.

Rollers

132, 132 are mounted on the ends of the shaft 131 outwardly of the

bearings

130, 130 and are disposed in; guides 133, 133 mounted on the inner surfaces of the

platen arms

97 and 98, Figs. 2 and 6. 85 Extending forwardly from the crosslbrace temete 129A and disposed outwardly of the side members 134 and 135 of the frame member 127 are

bifurcated lugs

136 and 137, Fig.'6. Supported by projections extending from the cross brace 129 are bearing

blocks

138 and 139, Fig. 5, which are disposed outwardly of the cam plates 125 and 126Fig. 6. A guard plate 140, Fig. 3, is connected to and extends between the front faces of the bearing blocks 138 and 139. Rearwardly of the guard-plate 140 and carried by the bearing blocks 138 and 139 is a shaft 141, 5, on which rollers 142 and 143 are mounted, which rollers are disposed below the

cam plates

125 and 126. The

bifurcated lugs

136 and 137 embrace the shaft 141, Figs. 4, 5 and 6. Transverse members 142 and'143 extend

vbetween'the bars

105 and 106 at the forward and rear endsof the platen support. `104.

A plate 144 extends between these members 142 ,and 143 substantially mid-l way between the bars 105 and 106., A shaft 145, Figs. 3 `and 4 extends between the side members 134 and 135, ofthe frame 127, rearwardly of the cross brace 129 and aV segmental arm 146 is pivotally mounted thereon. At the 4upper end of the segmental arm 146 is a bearing 147 in which a shaft 148 is journal'ed supporting a roller 149 that' travels on the plate 144. A projection 150 extends from the bearing 147 and a pin 151 extends rearwardly from lthe cross brace 129. -A spring 152 extends between the pin 151 and theprojectionc150 andthis spring serves to urge therollers 142 and 143 into engagement with' the lower or cam faces of the cam plates 125 land 126'. This arrangement supports the frame 127 at the forward end thereofV and the rear end of this frame is supported by the rollers 132.' This frame is arranged for rectilinear movement which is imparted thereto in a manner set forth presently. The inner or rear ends of the

cam plates

125 and 126 are inset to provide dwells 153Fig. 4, and the intermediate portions of these cam plates are provided with' rises 154 and, at the forward ends, dwells 155 are' provided. When the 'frame is in rearward or at rest position the rollers 142 and 143 are disposed on the dwell portionss153 asillustrated in Fig. 3. However, when movement is imparted to the frame 127 these .rollers engage the rises 154 and, therefore, the forward end of the frame is pivoted downwardly toward the printing bed in'whicli position it remains until the dwell 155 is reached on the forward movementA of the frame 127. Bearing blocks 156 and 157, vFig'. 5, include plate portions 158 and '159 whlch plate portions extend over and are connected to the bearing blocks138 journaled on which the platen rol1er -161 is mounted to extend substantially across the area defined between the plates 105 and-106. Whenthe forward end of the frame 127 is moved downwardly by engagement of the rollers 142 and 143 with the rises 154 the platen moves across the sheet 92 to. perform a printing operation.

' Onthe platen arm 98 is-astud 162 on which tlie bearing 163 of the lever 164 is pivotally mounted. At the forward end of the forwardly projecting arm 165 of the lever 164 is a roller 16,6 which rests on the face 167 ofthe stud 168 that projects from and is .unitarywith the toggle member 113.

l5 A pin 169 extends from the forward end of.

the arm 165 and one end of a spring `170 is connected thereto, the other end ofi/the spring bein connected to the p in 171 on the lstud 168. djacent the end of the arm 172 of the lever 164 a dog 173 is `pivot'ally mounted Thelower or free endof the dog 173 has a circular notch'174 therein andincludes 4aprojecting finger'17-5, Figs. 3 and 4. In bearings at 'the upper ends of the arms36, 36 lof the main operating member 35 a shaft-176, Fig. 2, is journalled. -Connecting

links

177, 177 have bearing portions rotatably mounted on the shaft1176: These bearing portions of.- these connectinglinks are retained against `lateral movement by being positioned between the bearings on the ends of the arms'36, 36 and the

collars

178, 178 fixed to the shaft 176. Bearing portions at the other ends of the lconnecting links 17 7,-

177 are pivota-lly 'mounted on the shaft 131. In this manner the frame 127 is connected to the ,main operating member and, therefore, when this main operating lmember is rocked, the rectilinear movement above set 40 forth will be imparted to the frame 127.

When the. main operating member 35 is dis-v.

pos\ed in at rest position ,'shown inr Fig. 3, the fin er 175 on the dog 173 `rests on the shaft 1 6 (see Fig. 3) with a portion of the shaft 176 disposed-in the notch 174. When the main operating member 35 is` rocked to impart the forward portion of the rectilinear movement tothe frame 127 the engagement of the shaft 176 inthe notch 174 will pivot the lever 164 about the stud 162 which will cause the forward end of the arm 165 of the lever to move downwardly and the roller ,166 on the arm 165will move across the face 167. When the parts. are in at rest position .the

55. toggle sections 108 and 112, and 109 and described. However, the v"action ofthe roller l166`on the face 167 will be transmitted through the stud 168V and, by-reason of the interconnection of the toggle members, these toggle members will be, moved Vinto alinement', as illustrated in Fig. 4. --When the devicel starts to move over the; face 167, as abovetoggle members are thus moved the laten support 104 is pivoted about the sha 101 from the inclined position of Fig. 3 into the horizontalposition of Fig. 4.. When in the horizontal position of Fig. 4, the camsur- 9 faces on the cam plates 125 and -126 are parallel with the upper surface of the printing device 71 on the printing bed 41. It has been pointedout that the platen rollerl 161 is-mounted on the frame 127 and also that 75 the spring 152 urges the rollers 142`and 143 into engagement with the cam surfaces of the cam plates 125'and 126. As illustrated in Fig. 3, at the start of the movement imf parted to the frame 127 by the `I'nainfoper- 8 ating member 35, the rollers `142 and 143 are disposed on the dwells 153 and these dwells are of a length to permita lapse of time sufficient for the alining of the toggle members, to move the platen support into horizontal position.- As soon as the platen support is disposed in horizontal .position the rollers 142 and 143 move onto the rise 154. The start of this rise is just rearward l ofthe rear end of the printing device 71 and, 90

.therefore,the platen roller 161-will be moved `downwardly into engagement with the sheet 92 that will have been reviously disposed over the

printing device

7,1 and, as the rollersr continue to move along the rise's 154,'the 95 platen roller will move across the sheet 92 and perform the printing operation. It is to befunderstood that a suitable ink ribbon is directed below the shield 80 over the faces of the 1 and the movement of the .platen roller, as aforesaid, merely forces the sheet into engagement with this'ribbon which 'in turnfengagesthe faces of the printing'characters and thus impressions are made on the sheet 92. Extending 1 1 wardly from the cross brace 129 is a boss 1 9, Fig. 4, in which 'a screw 180 is mounted. The screw 180 ex- 109-seats in the notch 181 in the end of the stop 182 secured on the inner surface of the bar 106 to limit movement of the rod 110 and when the" screw.180 engages the rod 110` in the manner ,set forth this portion lof the rod 125. is moved from thisnotch. A- spring 183 is connected to a pin 184 on the platen -ar'ni 98 and to a pin 185 on the platensupport 104. When the platen support 104 pivoted downwardly this spring is tensioned and printing characters on theprnting,m0

the' position illustrated in 115 Fig. 3 and also to arrange the

toggle members

108 and 112, and 109 and 113, in angular relation with each other. `When the toggles are moved from alinement, the surface 167 engages roller 166 and moves lever 164 back into the position shown in Fig. 3. At the time the toggle structure is moved back vinto the angular position and the platen support is elevated bythe spring 183, themain operating member' 35 will have attained the forward end of its movement and will start to move rearwardly and, consequently, the frame 127 will be moved similarly. After the shaft 176 has disengaged the notch 174,.

which will happen immediately" after the lever 164 has been pivoted into the position shown in Fig. 4, the spring 186 extended' between the upper end of the dog 173 and the arm 17 2 will act to arrange this dog in vertical position. Therefore, as the frame 127 moves rearwardly the shaft 176 will engage this dog and will pivot the same in an upward manner as the rearward movement is continued. A pin 187 projects from the end of the arm 172 to prevent the dog 173 from being pivoted over center. The finger 175 prevents displacement of the dog 173 from the shaft 176 and also permits the dog to be properly positioned to locate the notch 174 'in front of the shaft 176. During the` reciprocation.` of the frame 127 the roller 149 travels on the plate 144 and the spring 152 expands and contracts in order to maintain the engagement between the rollers 142 and 143 and the faces of the

cam plates

125 and 126. When the platen devices just described are in the inoperative position shown in Fig. 3 the' various mechanisms are arranged to perform their functions in proper sequence. The depressing of the foot' treadle 27 causes movement of the arm 29 in the manner set forth which causes the `reciprocation of the main operating member 35. The movement imparted tothe lever 164 through the dog 173 will always move vthe toggle structure by reason of the fact that the spring 170 constantly serves to hold "the roller '166 on the face 167. As best ilvented from transverse movement. The up-.

per position of the forward end of the platen support 104. is determined by engagement of the pad 112', Fig. 6, on the toggle member 112 with the `cushion stop 113 carried by the lug 114 mounted on the platen aI'H Along each lateral side of the table 38 are frame members 188 and 189, and disposed on the upper edges of these frame members aeiaeea at the lateral edges of the printing bed 41 are ribbon guides 190 and 191, Fig. 5. v The ribbon 192 1s extended-between these ribbon guides 190 and 191 and over the printing ldevice 71 below the shield 80, as previously rotation of the shafts 194 and 196.- Ribbon spools -199 and 200 are mounted on the shafts 1 94 and 196 and the ribbon 192 is windable onto and. unwindable from each of these spools. -A suitable arrangement is provided for causing the ribbon 'to wind upon one spool while being unwound from the other and, preferably, this mechanism is arranged to operate to reverse the winding direction at the time all of the ribbon is wound on one spool. Such a mechanism is described and claimed in 1n copending application Serial N o. 435,524, led March 13, 1930. This ribbon feeding mechanism is'preferablyoperated with a step by step 'movement and means for imparting such movement are disclosed in Figs. 3, 4, and 5. A cross brace 201, Fig. 2, extends between the` arms 36, 36I

von which a roller 205 is mounted. A bracket 206 on the frame 1 includes a bearing 207. A shaft 208 is journaled in the bearing 207 and mountedon this shaft is a bearing 209. An arm 210, Fig. 5, depends from the bearing 209. A vportion of the arm 210 is segmental, as indicated at 211, and this terminats in a substantially straight portion 212. The roller 205 rests on the segmental portion 211 when the main operating member is in at rest position. However, when the main operating member is rocked forwardly, as above described, the .roller 205 moves over lthe segmental portion 211 and rotates the-bearing 209. The devices for imparting the step by step lmovement to the ribbon 192 .are operatively associated with the bearing 209 and receive movement therefrom. llt is manifest that appreciablemovement is imparted to the main operating member 35 and this movement is more than required to im' part the desired step by step movement to the ribbon 192. Therefore, in order that a relatively small amount of movement will be imparted to the ribbon192, upon reciprocation of the main operating member 35, the portion "212 is arranged at the end of the segment 211. The roller 205 will impart movement to the arm 210 as long as it moves over the segment211', but as-soon as roller 205 moves onto the portion 212 further move. ment `will not occur, the angularity of the lportion 212 .being proper-for this purpose. `It is apparent that by varying the length of the segment 211 the amount of movement imparted to the arm -210 may be varied and,y manifestly, this variation may be made to meet different requirements. l

lSince the movement of the rollers 142 and 143 over the faces of the

cam plates

125 and 126 determinesv the effective movement of the platen roller 161 itis possible toadjustthis platen roller relative totheprintf ing bed varying the position ofthe

cam plates

125 and 126. In this manner the im.

pression -pressure of the pla-ten roller may be regulated or, in the event the platen roller l is not properly alined with the printing fest that the gear 121 will be concentric.

bedgadjustment may be made to bring about proper alinement. This is accomplished in the following manner. The studs 117 and 118 at the ends of the shaft 116 are eccentric .with respect tosaid shaft.. The sleeve 119 is concentric with the stud 117 and this stud and sleeve are interconnected in 4a suitable* manner as by the 'pin `213, Fig. 5u Since .the sleeve 119 fand the'stud 117 areV concentric with respect to each other it is maniwith the stud 117. Thesleeve 120 iseccentric to the stud-'118 and the stud is rotatable in this sleeve. Since the sleeve-is Aeccentric to the stud'it is apparent that the gear -122 will beeccentric to the stud. The shaft 101 and the parts associated therewith are similarly arranged. ,As best illustrated in Fig.| 6,

bearings

214 and 215 are provided-on the outer face of the platen arm 97. A shaft 216 comprising axially alined sections 217 and 218, Fig. 6, is journaled in the bearings the Serration221 by the spring 224 disposed around the shaft section 217 between the washer 225 andthe collar 226, said collar being secured to the shaft section 217 by the pin 227. Inthe endfof the sleeve 222,'oppo? .t site the serrations 223, is an axial-.slot 228 into which7 'arpin 229, on the shaft section i 217 ,extends The washer 225 abuts the-end of the sleeve 222 having the slot 228 therein. As best illustrated in Fig. 1, a worm gear `230 is provided at one endof'the shaft section 217 and this worm gear meshes with the gear 123. On the shaft section 218 a .worm gear 231 is provided which I neshes with' the gear 121.1A knob 234 is provided at the forwardlend of the shaft section'218.

When the knob' 234 is gripped to rotate the shaft section 218the sleeve 219 will be rotated :as said sleeve .is connected to said shaft sectionby thepin. 220.. Since the serrations 221 on the sleeve 219-.are engagedby the serrations 223l on .the sleeve 222, and as' the sleeve 222 .is connected to the shaft'section 217' through the pin 229, it is manifest that the shaft. section217 will rotate with the'shaft Asection 218.; Therefore, both the ,wormg gears 230 and 231 will be rotatedand the rotation ofthesegears will be imparted to the gears 121and 123. As the gears 121 and 123 are both connected to the eccentric studs atthe ends of the shafts 116 and-101,

be rotated. As lthe studs at the ends of these shafts are eccentric tothe shafts rotation' of these shafts will vary I the eccentricity thereof relative to the horizontal as best shown in Fig. 7. In this' view the most` ec;

centric portion of the shaft 116 ishoriz'onbythe interconnection between the sleeves carrying these .gears and the studs, it is, .manifest thatshafts -116and -101 will also tally disposed and it is apparent that rotap tion of the shaft willelevate or lower this "most eccentricfportion.; 'By reason of the mounting of the bearing portions 114 and the shaft 116, it is lapparent that the .above variation inthe shaft 116 will be transmitted to the togglei'mjembers. This variation will be transmittedthrough the toggle members vto the forward end of theA platen support 104. Since thev rearend of this-platen 96 115 ofthe toggle members 112 and 113 on support is directly mounted on the shaft4 101,- it is apparent that variation of this shaftwill act in the same man-ner as ,variations in the shaft116and,therefore, the rear end of the lowered. f

platen support may be elevated or Simultaneous variation of both shafts `11`6 and 101 will result when thefknob 234 is rotated with the serrations 221 and 223 in engagement.l However, if the sleeve 222 isslid along the shaft section 217 to disengage the serrations, only the shaft section 218 will be rotated by rotationof the knob 234. i Also, when the serrations' are so disengaged the knur1ed``porti'on 2 35 on the. sleeve 222 may ,be gripped and this sleevemay berotated which will result in rotation of b ut the shaft section 217. From the foregoing itis manifest that the shafts may be lrotated* simultaneously or independentlyl y as desired, and this arrangement is utilized to vregulate the impression pressure ofthe platen roller 161: However, since the studs at the other ends o f the

shafts

116 and 101 are rotatable within the bearings, no movemen-t will be imparted to the gears connected to these bearings -when the .shafts are rotated in .making theabove de 'scribed adjustments'. Tn order to equalize the pressure exerted` by the platen roller or to vary the horizontal alinement of the platen roller ment includes

bearings

236 and 237 in whlch a sectional shaft 238 similar to the shaft 216 is journaled. Sleeves 239 and 240 respectively similar to the

sleeves

220 and 222 are mounted on the shaft 238 and are arranged in the same manner as the

sleeves

220 and 222. A knob 241 at 'the forward end. of the' shaft 238 may be gripped to rotate this shaft and when the serrations on the sleeves 239 and `240 are engaged the shaft will be rotated as a unit. Worm gears 242 and 243 on the shaft 238 respectively mesh with the gears 124 and 122 and when the shaft is rotated as a unit both the gears 124 and 122 are rotated.` When the serra- -tions on the leeves 239 and 240 are separated either/ -he gear 124 or 122 may be rotated. By reason of the eccentricity of these gears and the sleeves therefor with respect to the studs at these ends of the

shafts

101 and 116, it is apparent that these studs will be caused to move in substantially vertical planes upon rotation of the gears. However, in this instance, the shafts will fulcrum on the studs at the opposite ends and the major part of the vmovement will occur adjacent the platen arm 98, Whereas when the gears 121 and 123 are Iotated movement will be substantially uniform throughout the shaft lengths. In view of the fact that an independently operable adjustment is provided at each end of veach of the shafts, it is apparent that an' adjustment of any portion of the platen support may be made by operating the proper one of these adjustments.

It has been pointed out that the platen roller 161 is moved downwardly toward the printing device 71 just rearward of the rear edge of said printing device. It is also manifest that different widths of printing devices will probably be' employed. Further, the width of the printing devices for each particular type of operation will be substantially consistent. It is,Y therefore, advantageous to provide anarrangement whereby the time at which the platen roller is moved downwardly may be varied. Further, it is apparent that if such la variation is carried out the effective or printing stroke of the platen roller -will be shorter in connection with narrower printing devices. I,

therefore, construct thev machine in a manner which will permit a variation of the effective stroke of the platen roller. By reason of the fact that the relationship heretofore described between the dog 173v and the shaft 176 must always be maintained, it is apparent that the atrestposition of the mainv opasienta `an alteration in the positioning of the main operating member 35. Tt has been set forth that the platen roller 161 is carried by the frame 127. If, therefore, the frame 127 is made of greater length and the connectingA links 177 are of the same length andare connected in a similar mannen, it is apparent that the platen roller 161 will bedisposed farther forwardly. This also entails length,- ening of the dwells 153 and shortening of v the rises 154. However, if other adjustment were not made, it is apparent that the forward end of the frame 127 would -pass beyond the forward end of the platen support length than the frame for which the machine is set up is employed, it being.v understood -104 upon operation of-the main operating .member`35 when a frame 127 of greater that frames of dierent lenghs may bev mounted in 'the machine. onsequently, when aframe 127 of different length than that for which the machine is adjusted is installed, it is necessary to vary the center distance between the shaft 11 and the roller 32, and this is done by removing the arm 29 and substituting an arm of different length therefor. If this distance is shortened it is manifest that a shorter reciprocation will be imparted to the main operating member 35. However, such adjustment will vary the position of the main operating member 35 which, as stated, must be maintained constant. To accomplish this, a

pivot bolt 244, Fig. 3, is pivotally connected onthe frame 1 .at 245. Opposed sockets 246 and 247 are formed in the bearing bracket 8'which areinterconnected by an opening 248 and the bolt 244 is extended therethrough. Hemispherical washers 249 and 250 are seated in the sockets 246 and 247 and the. pivot bolt is extended through these f Washers- On. the pivot bolt 244, outwardly of the washers 249 and 250, nuts 251 and 252 are' mounted. By varying the positiony of the nuts 251 and 252 on the pivot bolt 244, it is apparent thatthe angularity of the bearing bracket 8 may be varied. This angularity will be varied in accordance with the shortening of the center distance between the shaft 11 and the roller 32 and, in

this manner, the proper positioning of the mainoperating member ,35 may be maintained. If the effective stroke of the platen roller is varied, in the above described manner, the operation' 'of the machine may be speeded up andthis may be done by varying the ratio 'between the ear 12 and the pinion Y 13, `or by varying t e ratio between the these ratios may be varied.

By moving the handle 44 into vertical position and engaging the hook end 45 with the stud 46 the printing bed may be slid forwardly and a printing device 71 may be installed thereon. The printing bed will then be slid `inwardly and the handle "44 turned to move the keyway 47 from alinement with the screw 48 to position the en-- larged portion 58 above the enlarged section of the keyhole slot 61, which also. lowers the shield 80. A sheet of paper 92 will then be disposed over vthe shield 80 in engagement with the vertically extending portions 85 of the lingers 83 below the clamping portions 86. The foot treadle 27 will then be depressed and the shaft 11 will be. rotated in the manner` set forth imparting movement to the arm 29 which in turn, in the manner described, Will impart movement tothe main operating member 35. The first portion of the movement imparted to the main operating member will aline the

toggle members

108 and 112, and 109 and 113, to bring the platen support into horizontal relation with the printing bed. The frame 127 will be moved forwardly and', at the time the platen support 104 is arranged in the horizontal position the rollers 142 and 143 will pass from the dwells 153 onto'the rises 154. Prior to the time the rollers move onto the rises 154 the platen roller 161 Will have disengaged theingers 89 and, therefore, the

' clamping portions 86 will be securely clamping the sheet 92. As the rollers move across the rises the platen roller Will move across the sheet and perform the printing -operation and, after the platen roller has passed the forward edge of the printing device 71, the screw 180 will have engaged the rod 110 and the toggle members will, therefore, be pivoted out of alinement thus elevating the platen support 104 to clear the platen roller from the sheet 92 during rearward movement thereofv caused by the rearward movement of the main operating member 35 which starts immediately after elevation of the support 104, and when said member reaches the position vshown in 4Fig. 3, the various mechanisms operated therefrom will again be in at rest position and after a new sheet has been positioned the operation may be repeated.

It is apparent from the foregoing descrip-` tion that I have provided a printingmachine in Which printing devices may be quickly installed or removed and positively positioned in printing position. Further, the machine is so arranged that operation thereof will be prevented until the printing device has been arranged in printing position. The platenarrangement in the machine is capable of variation in order that the pressure thereof may be adjusted to meet various requirements and this platen arrangement is also supported in a manner which permits proper alining thereof with the printing device in order that theimpression pressure of the platen may be equalized or made proper throughout the area of the printing device'. In addition to this, the machine is capable of variation in construction which permits it to be operated at the most advantzfilgeous speed so that in the event but a short e ective printing stroke is required the machine may be operated at a higher speed than that at which it is operated when al longer effective printing stroke is required. Many other advantages result from the construction above, and the machine is particularly adapted, as will be apparent, to the printing of optionalvalue tables'on insurance policies, production forms, and other printed matter wherein a limited number of impressions are taken from a printing device at more or less irregular times.

While I have illustrated and described a selected form of construction for carrying my invention into effect, it is to be understood that this is capable'of variation and modification without departing from the purview of the following claims:

I claim:

1. ,In a printing machine, means supporting a printing device in printing position, a roller platen for making impressions from the printing device, a frame supporting said roller platen,-means for moving said platen along the frame, means extending substantially parallel with the printing device for supporting said frame, and means for adjusting the position of the frame to vary the impression pressure of said platen.

2. In'a printing machine, means supporting a printing device in printing position, a roller platen for making impressions from the printing device, a frame supporting said roller platen, means for moving said platen along the frame, means extending substantially parallel with the printing device for supporting said frame, and means for adj justing the angular relation of the frame relative` to the printing device to equalize the impression pressure of said platen throughout the area of the printing device.

3. In a printing machine, means supporting a printing device in printing position, a roller platen for making impressions from the printing device, a frame supporting said roller plate, means for moving the platen along the frame, means extending substantially parallel' with the printing device for supporting the frame, means for adjusting the position of the frame to vary the impression pressure of said platen, and means for adjusting the .angular relation of the frame relative to the printing device to equalize the impression pressure of said platen throughout the area of the printing device. j

4. In a printing machine, means supporting a printing device in printing position, a roller platen for making impressions from the printing device, a frame supporting said roller platen, means for lmoving the platen along the frame, supporting means, adjustable means mounted in the supporting means, means/connecting the frame yto the adjustable means, and means for positioning said adjustable means to regulate the relation between the platen and the printing dev1ce.

5. In a printing machine, means for supporting a printing device in printing position, a roller platenfor making impressions from said printing device, a frame supporting said roller platen, means for moving said platen along` said frame, supporting means, adjustable means mounted in the supporting means, means connecting the frame to the adjustable means, means positioning the adjustable means to vary the impression pressure of the platen, and other means for moving said adjusting means to equalize the effectiveness of the impression pressure of the platen throughout the area of the printing device.

6. In a printing machine, means supporting a printing device in printing position, supporting means for supporting a roller platen for movement over the printing device Ito make impressions therefrom, and

means for actuating the roller platen, said supporting means including a shaft having eccentric studs at the ends thereof, bearing structures'receiving said eccentric studs, and means for rotating said shaft whereby the eccentricity of the studs thereon will cause the means supported thereby to be moved toward and away from the printing device to vary the impression pressure exerted by the roller platen during movement over the printing device.

v7. In a printing machine, means supporting a printing device in printing position, a-

platen, a platen supporting member, supporting' means for said platen supporting member including shafts at opposite ends of` said member, eccentric studs at opposite ends of sald shafts, and bearings Jfor said studs, and means for rotating said shafts whereby the eccentricity of the studs will cause the platen supporting member to bey moved to- Award or away from the printing device to vary the impression pressure of the platen.

8. In a printing machine, means supporting a printing device in printing position, a platen, a platen-supporting member, supporting means for said platen supporting memberincluding shafts at opposite ends of said member, eccentric studs at opposite ends of said shafts, and bearings for said studs, means for rotating said shafts including a separable arrangement whereby 4said shafts may be independently rotated to move thel platen supporting member toward-or .away from the printing device to vary the opposite ends of said shafts eccentric withthe studs, `means for rotating said first named bushings :to vary the eccentricity of the shafts to move ythe platen supporting member toward or away from the printing device, and means for rotating the second bushings to vary the horizontal alinement of the platen with the printing device.

10. In a printing machine, means supporting a printing device in printing position,

'a platen, a platen supporting member, supporting means for said platen supporting member including shafts at opposite ends of said member, eccentric studs at opposite ends of said shafts, bushings for studs eccentric to said shafts and rotatablerelative thereto, and means for rotating said bushings to vary the horizontal alinement of the platen supporting member and the platen with the printing device.

11. In a printing machine. means supporting a printing device in printing position, a platen, a platen supporting member, supporting means for said platen supporting member including shafts at opposite ends of said member, eccentric studs at opposite ends of said shafts, bushings for studs eccentric to said shafts and rotatable relative thereto, and separable means for simultaneously vor independently rotating said bushings to vary the horizontal alinement of the platen supporting member and the platen with the printing device.

12. In a printingmachine, means supporting a printing device in printing position, a platen, a platen supporting member, supporting means for said platen supporting memberand including shafts at opposite ends thereof, mduntin-'g` means for corresponding endsof said shafts, eccentric studs at the opposite ends of said shafts, and bushings vfor said studs eccentric therewith and rotatable relative theretoand adapted to be moved to vary the position of `said shafts to determine the horizontal alinement.

of the platen with the printing device.

13. Im a printing machine, means supporting a printing ydevice in printing position, 'i

ends' thereof, mounting means for corre-j sponding ends of said shafts, eccentric studs at the opposite ends of said shafts, bushings for said studs;,eccentric therewith and rotatable relative thereto, and`means for rotating said bushings to vary the position o'r said shafts to determine the horizontal alinement of the platen with the printing' device.

14. In a printing machine, means supporting a printing device in printingposition,

v a platen, a platen supporting member, supporting means for said platen supporting member and including shafts at opposite ends thereof, mounting means for corresponding ends of said shafts, eccentric studs at the opposite ends of said shafts, bushings for said studs eccentric therewith and rotatable relative thereto, means for rotating said bushings to vary the position of said' shafts to' determine the horizontal alinement of the-platen with the printing device, and

- 'separable means? for simultaneously or inde- 4 pendentlyperating the means for rotating said bushings.

' 15. In a printing machine, .means support- .ing av printing device lin printing position, a p1aten a platen supporting,v member, supporting means for said platen supporting member including shafts at opposite ends of said member, eccentric studs at opposite ends of said shafts, bushings at corresponding ends of said shafts concentric with the studs and connected thereto, bushings at the o posite ends of said shafts eccentric With t e studs, separable means .for simultaneously or independently rotatingsaid first named -bushings to vary the eccentricity of the shafts to move `the platen supporting membertoward oraway from'the vprinting de vice, and separable means for simultaneously or independently .rotatingthe second bushings to vary the horizontal alinement of` the platen with the printing device;

v16. In a printing machine, a support for holding a printing device-in printing position, a roller platen, supporting means` for said platen, Ameans for reciprocating said platen on said supporting means and over said printing device, carrying means for;

said supporting means and including movable parts,l means operable on the movable parts of said carrying means and positionlng the 'same -to arrange the platen in oper, ative relation with the printing device during movement of the platen in one direction, and means associated with ythe platenl for actuating the movable parts of the carrying means to move thev supporting means and position the platen out of operative relation with the printing device as Asaid platen reaches theend of its movement in said one' direction.

" 17. In a printingmachine, a suppfort forV holding a printing device in printing. position, a roller platen, supporting means for 'parts of said c saidV platen, means for said.` platen on said supporting means and over said printing device, means for Vwith the platen actuates the movable parts of the carrying means.

18. In a printing machine, a support for holding a printing devicein printing position, a roller platen, supporting means for said platen, means for reciprocating said platen on saidsupporting means and over said' printing device, carrying means for vsaid supporting means and including movable parts, a rocker operable on the movable parts .of said carrying means and positioning the same to arrange the platen in operative relation with the printing device during movement of the platen in one direction,

means for operating the rocker `from` the platen reciprocating -means at. the start o f movement of the platen in said one direction, and means associated with the platen for actuating the movable parts of the carrying means to move the-.supporting means and position the platen out of operative relation with the device as said platen reaches the end of its movement in said one direction.

19. In a. printing machine, a support for holding a printing device 'in printing position, a. roller platen, supporting means for leo said platen, means for reciprocating said .platen on said supporting means and over raid printing device, carrying means for said supporting means and including movable parts, a rocker operable on the movable parts of said carrying means and positioning the same te arrange the platen inoperative relation With the printing device during movement of the. platen one direction, means. for operating the rocker from the 'platen'reciprocating means at the start of movement of the platen in said one direction, means associated with the platen for actuating the movable parts of the carrying means, yieldable means acting on the supporting means .pto move the same and Withdraw the platen from `operative relation with the device when said means associated withl the the movable parts of the carrying means, said yieldabl'e means alsa acting to reposition said rocker as it withdraws the platen platen a'ctuates from operative relation with the printing device.

20. In a printing machine, `a support for h .olding a printing device in printing-post' tion, a roller platen, supporting means for said platen, means for reciprocating said platen on said supporting means and over said printing device, carrying means for said supporting means and includingmovable parts, a rocker operable on the movableparts of said carrying means and positioning the sanie to arrange the-platen in' operative relation with the printing device during movement of, the platen in one direction, a stop for limiting movement of the supporting means to insure positioning .of sa1 d platen in operative relation with the prlnting device, means for operating the rocker from the platen reciprocating means 2 at the start of movement of the platen in said one direction, means associated with the platen for actuating the movable` `parts of the carrying means, and yieldable means acting on the supporting means to move the same and 4withdraw the platen from operative relation with the printing device when said means associated with the platen actuates the movable parts of the carrying means, said yieldable means also acting to A 3 reposition saidrockerl as it withdraws the platen' ,from operativeV relation with the printing device, and means for limiting movement of the supporting means as caused by said yieldable means.

21. In a printing machine, means supporting a printing device in printing position, a roller platen, supporting means for Said platen, a shaft forsupporting -one end of said supporting means, atoggle structure 40 for supportingthe other end of said sup- 5 printing deviceJ upon 'movement of the platen in the direction named movement.

22. In a printing machine, means supporting a printing device :in printing posiopposite to the first .60 tion, a roller platen, supporting means for said platen,` a shaft for supporting one end of said supporting means, a toggle structure e for supporting the other end of said supporting means, means for reciprocating said said printing device,'means` .for alining the portions of said toggle 'structure to pivot y said supporting means about said shaft into operative relation with said printing device as said platen moves in one direction thereon to cause said platen to make an impression from said printing device, means for moving said portions of said toggle structure from alinement to permit said supporting structure to'pivot about said shaft Jfrom operativeI relation with said printing device to hold said platen away from said printing device uponjmovement of the platen in the direction opposite to the first named movement, resilient means for. urging said supporting meansl into lsaid last named position, and means for limiting the actionof said resilient means.

23. Ina printing machine, means supporting a printing device in'printing position, a roller platen, movable supporting means for said platen, means for reciprocating said platen on said supporting means and over said printing device, means for moving said supporting Jmeans into operative relation with said prlnting device when said .platen moves in one .direction over said printing device and for moving said supporting means away from said printing device. upon movement of s'aid platen in the other'direction, and means including eccentric devices for adjusting said supporting means and said 'platen toward and away from said printingdevice whereby uniform impressions will be made by saidl platen.

24. In a printing` machine, means supporting a printing device in printing position, a roller platen, movable supporting means for said platen, means for reciprocating said platen on said supporting means and over said printing device, means for moving said supporting means toward said printing device when said platen moves in one direction over said printing device and .for moving said supporting means away from said printing -device upon movement of said platen in the other direction, and mea-ns including eccentric devices for ad justing the supporting means and the platen relative t0 the printing device to aline the platen with the printing device so'that uniform impressions are'made from the printing device bythe platen.

25. In a, printing machine, a printing bed, means for retaining a printing device on said printing bed, means for moving said printing bed to and from printing position, a platen for making impressions on said printing device. when in printing position, meansfor operating said platen, and means for preventing operation of said platen, 0peratmg means when' said printing bed is moved from printing position. -v l 26. ln a printing machine, a printing bed,

platen on said supporting means and over means for retaining a 4printing device on bed, means for moving said said printing rinting position tion, operating means for said machine, control means for rendering said operating means operative. and means for preventing movement of said control means when said printing bed is moved from printing posi'- tion.

28. In aprinting machine, a platen structure, a printingbed, means for retaining on said printing bed a printing device adapted for cooperationcwith the platen when the printing bed is disposed in' printing position, means for supporting said printing bed for movement to and from printing position, a shaft journaled in said last named means, a handle on said'shaft adapted to be connected to said printing bed to move said printing bed to and from printing position,

^ and means operable from said shaft for preventing operation of the platen when said printing bed is out of printing position.

' 29.In a printing machine, a platen structure, a printing bed, means for retaining on said printing bed a print-ing device adapted for cooperation vvitlithe platen when the printing bed is disposed in printing position, means for supporting said printing bed for movement to and from printing position, a shaft slidable and rotatable in said last named means and having a handle thereon 'adapted to be connected to said printing v bed is 'in printing position.

ture, a

I aY

bed toY permit movement of said'printing bed for preventing disconnection of said handle from said printing bed until said printing 30. In a printing machine, a platen strucprinta'ngbed, means for retaining on said printing bed a printing deviceadapted for cooperation with the platen when Vthe printing bed'is disposed bed for movement tofand from printing position, ashaft slidable and rotatablein said last named means and having a handle thereon adaptedto 'be connected to said printing bedto permit movement of said printingbed to and vfrom printing position, means for preventing A, disconnection of' said handle and 'said printing bed until said e, av platen fork nd Jfrom printing positiomand means changeable means connecting in printing po- -siti0n, means forsupporting said printing,

rintin bed is in rin' `position, and iiicans mnected to salid slilal for preventing operation of the platen said printing bed is in printing position.

31. In a printing machine, an ink ribbon, a platen structure, a printing bed, means for retaining on said printing bed a printing device adapted for cooperation' with the platen when the printing bed is disposed in printing position' below said ink ribbon, means for moving said printing-bed to and from printing position, a shield adapted to be disposed over said ink ribbon when said printing device is in printing position, and means for moving said shield away from said ink ribbonwhen said printing device is moved from printing position.

32. In a .printing machine, structure, a printing bed, means for retaining on said printing bed a printing device adapted for cooperation with the platen when said ,printing bed is disposed in printing position,ineans for moving said printing bed to and from said printing position including a handle, a shield adapted tobe 'disposed over said printing device when in printing position, and means operable with said handle for moving said shield away from said printing device when said printing device is moved from printing position.

33. In a printing machine, a platen structure,- a printing bed, means for retaining on said printing bed a printing device adaptedfoicooperation 'with the platen when the printing bed is disposed in printing position, means for supporting said printing. bed for movement to and from printing position, means for moving said printing bed to and from printing position including a handle mounted on a slidable and rotatable shaft journaled in the supporting means for said printing bed, a shield disposed over and juxtaposed to said printing device when in printing position, and means operable by rotation of'said shaft for moving said shield from juxtaposition with said printing device ing position.

A printing machine including printwhen said printing bed is moved lfrom printving device supporting means, a platen, a main operating member, .operating means for s aid main operating member, intereratingmember to said operating means for varying the effective movement of said main operating member, and-ad]usting means for positioning the main operating member in a similar atrest position upon variation of the effective movement thereof.

35. In a printing machine, porting a printing device in printing position', means a platenV said main opmeans sup'-A including a roller platen for making impressions rom'the printing device, interchangeable means supporting the platen for movement across the printing de-