US2137096A

US2137096A - Rotary reprinting and copying machine and a method of obtaining printed copies from a mirror script original

Info

Publication number: US2137096A
Application number: US166171A
Authority: US
Inventors: Ritzerfeld Wilhelm
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-09-30
Filing date: 1937-09-28
Publication date: 1938-11-15
Anticipated expiration: 1955-11-15

Description

Nov. 15, 1938. w rrz 2,137,096

ROTARY REPRINTING AND COPYING MACHINE AND A METHOD OF OBTAINING PRINTED COPIES F M -A MIRROR SCRIPT OR NAL File ept. 28, 1937 Sheets-Sheet. 1

Mme/m @ku rad Java); for

NOV. 15, 1938. w Rrrz 2,137,096

ROTARY REPRINTING AND COPYING MACHINE AND A METHOD OF OBTAINING PRINTEDOOPIES FROM A MIRROR SCRIPT ORIGINAL Filed Sept. 28, 1957 2 Sheets-Sheet 2 Java afar- Patented Nov.1s-, 193s"* "UNITED "STATES;

PATENT-l OFFICE ao'ramz REPRINTING AND COPYING MA- f CHINE AND A METHOD on OBTAINING PRINTED corms FROM A MIRROR somr'r omemar.

Wilhelm Ritzcri'eld, .Berlin, Germany In .Germany September'30, 1936 pdpplicationseptember 28, 1931, Serial N... 166,171

' 20 Claims. "The invention relateyto rotary reprinting and copying machines and a method of obtainin printed copies from a mirror script original, the

- lines of which run in the direction of rotation of the printing drum, on sheets or the like previously moistened with a readily volatilizing liquid.

The object of the invention is to provide means for obtaining in one operation, from the same one has a constant text comprising, for example,

the mar g of the machine, theorder number.

. the marking of the work piece itself, of the mai terial and the. like, whilst the varying text com- 9 prises for example the indication of the work- 7 shopJforge, turning shop, milling shop etc.) the method of treatment, tolerances and the like.

Theinethod according to the invention consists broadlynin eifecting'the reprinting at two dif- 25 ferent parts of the printingdrum 'and so that at bne place the constant text of the original is transferredtoh plurality of the sheets to be printed and,--on the ,contraryfa't another place so that on eaeh sheet"of the plurality of sheets 30 to be printed there is transferred another, yarying part3?! the-original. Y I A rotary reprinting'machine according, to the invention servingior carrying out this method is, in general, characterized bya frame a printing 3?. drum rotatabl y mountecl on'said frame,"meansfor-rotatingsaid printing drum'and two print-/ .ihg units which ,are adjustable independently from one another parallel to the axis of'the printing drum. Preferably they can be fixed r elativ ely 40 to the latter in the temporary printingposition.

Means for exhangeably holding the mirrorgscript' original on said printing drum may be provided,

Each of the two printing. units may comprise in the known way either a moistenlng device and a counter pressure roller, or may also comprise means for feeding the sheets to be printed, say

a supply table in combinatio'n with these parts. However, a single supply table which may be adjusted relatively to both printing units by suit- .50 able means, .e. g. by.-means for seizing (stopping? .and may be coupled with one or the other unit may beused alone,-according to requirements. It is elear that in the case of two; tables the same means for adjusting may beused, It is desirable 35. toarrange both printing units on guide means,

e. g slidabiy on (me or more common guide bars 'or rods running parallel to the axis of the print ing drum and to make these adjustable in a 1 known way by .e. g. seizing (stopping) means and by connection members both automatically from the printing. drum and also by hand. The adjustment of the unit reprinting the varying text may be effected automatically by lines or sections (varying amount of adjustment) and the fixingof the two units in the temporary printing position may likewise be effected automatically. The

means necessary for carrying out these steps are known: Diilerent distances of the seizing (stopping) means and connection and coupling-mem bers. Another feature of the rotary, reprinting -ma chine acording to the invention is that the moistenlng devices have supplying means for the moistenlng liquid, e. g. each device may have a liquid conduit, controlled automatically from 4 the printing drum, each of'which can be shut off separately. E: g. a turnable rod may be provided with which the valve rods are in engagement. Means are provided to -move said turnable rod forward and back? E. g. this may be accomplished i by a crank shaft arranged with one end coupled to the front wall of the drum. More especially the rotatable rod may show an axially extending sector-like recess and the front of the valve rod may be arraiieed towards the lower surface of the .recess. Thereby the valves may be opened together or alternately. Further details'of the inconstruc- 'vention will appear from the following tional descriptionof the machine:-

The accompanying drawings illustrate shematically one constructional example of the section on lines ll' of Fig. 1,' Fig. 3 an enlarged 'cross section-takenthrough one of the guide rods for the printing units. g

Figs. 4 and 5 show how the displacement of one unit is carried out automatically or by hand from the printing drum;

Fig. 4 is a plan-view. Fig. v5 illustrates the device in elevation 9 a The printing drum I is rotatably mounted with its axle 2 in the side walls 3 of the machine, which also carry the guide rod 4 which can be turned-forward and backward around its longitudinal-axis, and the guide rod "5. The slide members .6 and I i of' the printing units are displaceably guided on these rods. Each one of detail in side machine. Fig. 1 is a front :view', Fig. 2 a vertical these units consists in theknown way of a moisstretched on the The unit 6 serves ior reprinting the varying drum l the counter pressure rollersv LII, H are element 45 is unwound irom'rthe disposed opposite the recess la of the drum I so II 'is a toothed rod carried on the printing that the displacement of both units can be unit 8, in the toothingdia of which theratchet effected without the mirror script original, and locking member ".whichisrotatable around. printing drum, becoming efiaced an axis i2 ,-en gages. The member 53 consists or thetwo, toothed pawls [Ia andllb which are rotatablyconnectedtogether around a pin "a.

or damaged.-

spring drum it.

text A on the sheets to be printed. For this pur- A nose I Id carried on the pawl "b which abuts pose it has a moistenlng strip of .felt 8a of line against a stop "e on the pawl l'la prevents r6- whdnth pawl l-la isi'otated around the pinl6 roller l0 isalso; made of line width. The unit I against the ,toothing lid. The rod 2|. which is serves for reprinting the constant textB on the? (under the'influence of the tension spring El. and rotatable around the pin 55, is connectedto.

sheets to be printed. To this end it has amoi'stenmg strip felt 9a whichextends over a number of the member 53.] A second rod 22,-which is under line widths so that therefore on the sheets to be the influence of .the tension spring 23, .is conprinted a strip can be moistened on which a ;-nected with-the pawl Ilb andis rotatable around the pin 24. The other end of the rod 22, rotatable I whole section of e original can be printed. This moistening strip of felt 9a is supplied from the around'the pin 25, is-connected with the one arm liquid container 9b throughsthe valve 90. Thel 26a of th'eangle lever 26 which is mounted so' as 3 adjusted relatively to the moistening] devicewa.

85 carriage I.

40 rod Sin the temporary printing position.

45 under suriace lb oi which; abut the lower ends whi'ci) isrotatablein the direction of the arrow.

5o (coupling means), not illustrated, irom 'a drlven rod. 38 is displaced in the direction of the arrow width .of the counter pressure roller ll correto be rotatable around the pin 21, The second spondsto the width-oi thestrip of felt 9a. drm 20b 01' the angle lever 28 is under the in- I2 is a supply table'ior the sheets to be print- 'fluenc'e 01 a key lever 28 which is rotatably mounted. In the constructional lexample illustrated, ed on the axis 29. The end 28b disposed opposite 26 (Fig. 1), the supply table I! is coupled with the to the key ila'is; as can be seen from Fig. 5, printing unit 6 by means of a suitable spring pressed pifi l3 engaging in corresponding -reof the pawl l'lb against the toothing llaturned upwards. This upwardly bent end 28b. abuts against the arm b or the angle lever 26,

v. oesses. ll in the carriage 6. Since a number of Therod 2l-is pivotally connected at .30 with one recessesv M are providedthe supply table can, be arm oi the anglelever ii, the second arm lla I I I of which abuts against the upwardly bent. end no and the counter pressure roller f0 according to requirement. The supplytable l2 calf further be coupled with the unit 'I'. In this case a spring pressed pin l5 engages in the recesses l6 of the key Ha. I v .On the-side wall or the drum I is arranged a r oi a double lever 34 rotatably mounted on the A number of borings or recesses 11 are arranged side wall I of themachine at This leveris on'the rod 5 and in these borings spring pressed under the influence oi the spring 3 andis iurpins Knot shown) oi the printing .unit'stand I -ther pivotally connected at 31 with the rod/38 can engage, whereby the units are fixed on the a thepln :40. A- pin ll is iix'ed on the rod 38 and The control 01- the valves 8:! and 9c is eflected abuts against the upwardly turned end 32b of the -by reason of the valve rods I 8 being in engagelever-I2 likewise-rotatable around the pin 29.

raised by tension springs 19 (Fig. 2) atperiodic nent with the rotatable rod 4. This latter has Further. the lever .abiits against one arm or; an axially extending-recess la (Fig. 3) on the an adjusting lever 43 rotatably mounted at 42,

of the valve rods It. It the rod- 4 is turned forward and backward in themdirection of the ar- III. "In the position illustrated by Fig. 5 the pin lid. is disposed in range of the stop 33, so

or the -levei 32 provided at its free end with a stop 33 which is'flxed within range of the pin 34d which is guided by means of thsldt 3S and ofsrow s into the dotted positionand back, which that on rotation of the drum I in the direction can be eflected with the aid of, known means; of the arrow (Fig. 5).];1 lev r 3| i rotatgijhg IV and the lever 12 is thus influenced and acts inturn, through the angle lever 3|, on'the rod 2| andthe member JI. I

part,oi 'themachine, the

\ valves

8c and 9c are intervals, so thath correctly measured quantity of liquid can pass'to' the i'eltstrips 8a and 9a If during use of the machine the printing unit 55 during the return oi the .rod into th rollerlll, are'take'n up by-a delivery table {0 and 'l'h'is iatter rotates, thr' illustrated).

- constructed in the known way) A second tension element 41 leads to. a winding up drum 48 mm the containers and 9b. 'lheiclosingoi/ I with all. its accessory parts is to be automatically the valves to and-9c takes place 'a' fom'atically adjusted by one line by the I, this is eflect basic posied by the. stop a of the drum pressing against tion shown in Fig. 8. thepin 31a. The printed sheets-on the like, afterleaving the printing drum l and the counter pressure in presses passed for example to a collecting'container (not w 'Reierging now to am and.5, ,-the unit print- 1' I I I ing the vafying text (6) is connected through whereby the rod 2| ,isdisplaoe,d in the direction the tension element with a spring roller IQ A tion oi'thearrovt "1n against the 'toothing 15a, which is flxe'd on the axle 49 of a ratchet drive, I whilst the pawldlb moves out of (not illustrated)". The "and withit also the toothing 13d. The movements of theteeth the printing unit 15,-, as well as all parts connected ll'laand l'lb are so related that the tooth "a v with it, can be actuatedmith' thelaid o! acrank engages in the toothing I Saas soon as the sliding wheel 50hr such a way that the printingunit 8' part 8 is displaced by the width of one line under is moved-agaihst the action of .the ratchet drive the influence'ot the spring action of the drum 40 hi thearrow The member 53 is thereby rotated so that the pawl "q is moved in the direc- 45. in the direction of the.arrow 1I,-whereby the and of thefltensionelement d5, When this has The lever 34 'iixthet'hy moved in the directioh otthe arrow V. whilst the rod is Ma 01' the angle 3 Land rotateathe r in the direction ctthe'arrow V1(Flg 4) occurred the tooth i'ib prevents any i'urthermovement of'the printing unit 6 with allof its" parts.

'Ihesame operation can, however, be effected direction of the arrow Vso that the pin Ma comes out of range of the stop 33. If the key 32a .is depressed the same operation is repeated as above described.

If, however, the part 6 is to be displaced'for adjusting to any one row through a-number .of'

line spacings, the key 280 is depressed. The lever 28 thereupon produces through its end 28b a rotation of the lever 26 in the direction of the arrow IX so that therod 22 is displaced in the direction of the arrow X. The latter rotates the pawl l'lb by itself alone in such a way that its tooth moves out of the toothing l5a of the rod 5| in thedirection of the arrow XI (Fig. 4). The part 6 can thereupon be moved towards the left for any desired number of lines together with all the parts carried .by it and ca be again locked on releasing the key 2811. The return of the part 5 with all its parts inthe direction of the arrow II is eifected through the gear 48, 49, 50.

Having now-particularly described and ascertained the nature of my said invention and in what manner the s'ameis to be performed I declare that what I claim is:-

1. The method of printing orito copy sheets previously moistened with a readily volatilizingsolvent atext having a constant portion to be imprinted onto" each'of said copy sheets andv a varying portion having a plurality of lines to be selectively imprinted onto said copy sheets which comprises tensioning around the circumference of a printing drum a copyable mrror script origin'al bearing said text with its lines in the direction of rotation of said drum, moistening a strip of said copy sheet 'having awidth corresponding tothat of said constant portion with a L readily volatilizing solyent,.moistening another strip of said copy sheet having at least a singleline dth with said solvent, and subsequently passing said moistened copy sheet in contact withsaid original to print said constant portion and at least one line of said variable portion onto said copy sheet-at diiferent portions thereof.

2. In a'rotary reprinting and copying machine printing onto copy sheets'previously' moistened with a readily volatilizing solvent, the combination comprising .a frame, a printing drum rotatably .mounted in said frame, means for rotating said printing drum, a pair of printing unitsadapted to be displaced in a direction parallel to the axis of said printing drum, and means for adjusting the positio n of said printing units independently from one another in said direction. 3. Ina rotary, reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizingsolvent, the combina- '.tion comprisinga frame, a printing drum rotatably mounted in said frame,-means for exchangeably;,holding a mirror script original on said, printing drum, means for rotating said printing drum, a pair or printing units adapted to be displaced in a-direction parallel to the axis of.

said printing drum, each of said units comprising a moistening device and a counter pressure roller, means for adjusting the position of said printing units independently from one another parallel to the axis of the printing and meansfor displacing said units in said direction. i

; 4. In a rotary reprinting and copying machine I printing onto copy sheets previously moistened with a readily volatilizing solvent,- the-combination comprising a frame, a'printing drum rotatably mounted in said frame, means for exchangeably holding afmirror script original having a constant portion and a varying portion around the circumference of said printing drum, means ing units for reprinting said constant and said for rotating said printing drum, a pair of printvarying portion of the original respectively and being adapted to be displaced in a direction parallel to the axis of said printing drum, each ably mounted in said frame, means for exchange- I ablyholding a mirror script original having a constant portion and ,a varying portion around the circumference of said drum, means for rotating said drum, a-pair 'of printing units for r'eprinting said constant and said varyingportion of the original respectively and being adapted to be displaced in' a'direction parallel to the axis of said printing drum, each of said units including a moistening device and a counter pressure roller, means for adjusting the position of said units independently from one another in said direction, means for displacing said printing units both manually and automatically by "the rotation of said printing drum, means for varying the amount of displacement of the unit reprinting the varying text, and means for automatically fixing the printing units in the temporary printing position.

6. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readilyyolatilizing solvent, the combination comprising a frame, a printing drmmrotatably mounted in said frame, means for exchangeably holding a mirror script original having .a. constant portion and a varying portion around the circumference of said drum, means for rotating said'drum, a pair of printing units'for'reprinting said constant and said varying portion of the original respectively and being adapted to be displaced in a direction parallel to the axis 7 of said printing drum, each of said unitsincluding a moistening device and a. counter pressure roller, means for adjusting the position of said units independently from one another'in said direction, means for displacing said printing units both manually and automatically by the rotation of said printing drum m'eans for automatically fixing said printing units intheir temporary printing posit-ion, and means for feeding clear sheets to be printed onto saidprinting drum 7. In a rotary reprinting and copyingmachine printing onto copy sheets. previously moistened with a readily. volatilizingsolvent, the combination comprisinga frame, a printing drum rotatably mounted in said frame, means for exchangeably holding a mirror script original having a constantportionand a varying portion around the circumference of said printing drum, means i'or rotating said printing drum,'a pair of printing units for reprinting said constant and said varying portion of. the original respectively and being adapted to be displaced in a direction parallel to-the axis of said printing drum, each of said unitsincluding a moistening device and. a-counter pressure roller, means for adjusting the position oi said units independently from one another in said direction, means for displacing v said printing units both manually and automatically by the rotation of said printing drum, means for automatically fixing said pzintingi units ing their temporary piintihg position, a supply table, means for adjusting said. supply table with re spect to 'saidlunits, means. for coupling said table withat least one of said units, and means for supplying readily, volatilizing. solvent :to said 8. In a rotary reprinting andcopyihg machine printed onto copy sheet s.previously moistened with readily volatilizing solvent, the combination c f prising a frame, a printingdruni rotat- 25 ab1y mounted in said frame,"'mean s for exchangeably holding-a. mirror script original having a constantportion and athe circumference of said printing drum, means for rotating said printing drum, a pair oi printin g units for reprinting said constant and said vary ing portion of the original respectively and being. adapted to be displaced in a direction parallel to the axis, of said printing drum, each-L, saidunits including a moistening device and a counter j pressure roller, means for adjusting the position moistening devices.

arying portion around for each of said moistening devices for feeding readily volatilizing solvent thereto, yalve means for each of said conduits, a valve-rod for each of said valves for opening and closing the same when actuated, and means including a rotatable rod 5 having a sector-like recess therein for actuating said valve rods and to control the now of liquid through said conduits.

10. In a rotary reprinting and copying ma-M chine printing onto copy sheets previously moIs tened with a readily volatilizing solvent, the

combination comprising a frame, a printing drum ,rotatably mounted in said i'ranie, means for holding a min script original having a :constant portion a d a varying portion around the 5 circumference of said printing drum, means for rotating said printing drum, a pair-of printing units adapted tobe independently displaced in a direction parallel to the axis of said printing 'drumand each including a moistening device and a counter pressure roller, oneof' said units having/a moistening device and a counter pressure roller of at least single line width ior'printiug said'varying portion of the priginaL-themther of said units having such of multi-line width for printing saicf constant portion of the original,

- means for adjusting the position of said printing units, and manually operative elements and elements, automatically operated, by the rotation of saidv printing drum to displace said printing unit of single line width by a predetermined amount to selectively copy at least a single line of said varying portion of the original.

11. In a rotary reprinting" and copying machine printing onto copy sheets previously moistened 0! said' printing units independently from one a/with a readily volatilizing solvent, the combina another in said direction, means for displacing said printing u'nits both manually and automatically by the rotation 01 said printing drum, means for varying the amount 0; displacement of the unit reprinting the varying text,-means for automatically fixing both printing units in the temporary printing position, a deed table, adjusting said feed table with respect to said printing units, means ior coupling said i'eed table with at least one of said unite-means for teeding readily volatilizingsolvent to said moistening devices including a conduit impeach-device and .means for controlling said feeding means.

, 9. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readilyvolatilizing solvent, the combination comprisinga frame, a printing drum rotatably mounted in said frame,- means for exchangeably holding a mirror script original havi constant portion and a varyi portion around the circumference of said printing d rum,, means for rotating said printing drum a'pair of print- Iing units for reprinting said constant and said varying portion. of the original respectively and being adapted to be displaced in a direction par-' 'allel to the axis'of said-printing drum, each of ,said units including a moistening device and a counter pressure roller; means ior, adjusting the position of said printing units independently from, one another in said direction, means for displacing said units both manually and automaticallyby the rotation oi said printing drum, 'means for A varying theamount oi the displacement of the reprinting the varying text, means for automatically nidng both piinting units in the temporary printingposition, a feed table, means for adiusting. said jeed table with respect to said printing units, means for coupling saidieedtable 75 with at least one ofsaid units, shou to "justing the sition of said printing tion comprising a frame, a printing ably mounted in saidi'rame' means for holding a 05 mea f r 1 be independently displaced in a di ection -parallel' to the axis of said printing drum and each including a moistening device and a counter. v

pressure roller,- o,u'e' of'said units having a moistening device and a counter pressure roller of at ieastsingle line width m printing said varying.

portion of the original, the otheroi said'units having such of multi-line width for printing said constant portion of the original, means for adl i m uallyopera le elements and elements automatically operated by the rotation of said printing drum to displacesaid printing unit of single line width by a predetermined amount ,to selectively copy at least a single line of said varying portion 411' the original, and means forautomatically flxing said printing units in the temporary printing .position. b a a ,60 4 12. In arotary reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizing solvent, the combinadrum rotatmirr'or script original. having a constant portion 1 and a varying portion around the circumference of said printing drum means for rotating said printing drum, a pair oi printing units adapted to 7 be independentlydisplaced in a direction parallel t0 the axis of said printing drum' and each including a moistening device and a counter pressure roller, one of said units having a moistening device and a counter pressure roller of at least'single line width for. printing said varying portion or the original, the other of saidrunits having such of multi-line width for printing said constant portion of the original, means for adjusting the position of said printing units, manually operable elements and elements automatically operated by the rotation of said printing drum to displace said printing unit of single line width by a predetermined amount to selectively copy at least a single line-of said varying portion of the original, means for automatically fixing said printing units in the temporary printing position, and means for feeding the sheets to be printed to said printing drum.

13. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizing solvent, the combination comprising'a frame, a printing drum rotatably mounted in said frame, means for holding a mirror script original having a constant portion and a varying portion around the circumference of said printing drum, means for rotatingsaid printing drum, a pair of printing units adapted to be independently displaced in a direction parallel to the axis of said printing drum and each including a moistening device and a.counter pressure roller, one of said units having a moistening device and a counter pressure roller of at least single line width for printing said varying portion of the original, the other of said units having such of multi-line width for printing said constant portion of the original, means for adjusting the position of said printing units, manually operable elements and elements automatically operated by the rotation of said printing drum to displace said printing unit of single line width by a predetermined amount to selectively copy at least a single line of said varying portion of the original, means for automatically fixing said printing units in the temporary printing position, a feed table for feeding-sheets to be:

printed to saidprinting drum, means for adjusting said feed table with respect to said printing units, means for coupling said feed table with at least one of said'units, and means for supplying a readily volatilizing solvent to said moistening devices.

14. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizing solvent, the combination comprising a frame,- a printing drum rotatably mounted in said frame, means for holding a mirror script original having a constant portion and a varying portion around the circumference of said printing drum, means for rotating said printing drum, a pair of printing units adaptedto be independently displaced in a direction parallel to the axis of said printing drum and each including a moistening device and a counter pressure roller, one of said units having a moistening device and a counter pressure roller of at least single line width for printing said varying portion of the original, the other of said units having such of'multi-line width for printing said constant portion of the original, means for adjusting the position of said printing units, manually operable elements and elements automatically operated by the rotation of said printing drum to displace said printing unit of single line width by a predetermined amount to selectively copy at least a single line of said varying portion of the original, means 'for automatically fixing said printing units in the temporary printing positioma feed table for feeding sheets to be printed to said rinting drum, means for adjusting said feed able with respect to said printing units, means for coupling said feed table with at least one of said units, means for supplying a readily volatiliz ing solventto said moistening devices, and means for controlling the flow of said solvent to. said moistening devices.

1 5. In a rotary reprinting and copying machine printing'onto copy sheets previously moistened with a readily volatilizing solvent, the combination comprising a frame, a printing drum rotatablymounted in said frame, means for ho ld 'ing a mirror script original having a constant portion and a varying portion around the circumference of said printing drum, means for rotating said printing drum, a pair of units adapted to be independently'displaced in a direction parallel to the axis of said printing drum and each including a moistening device and a counter pressure roller, one of said units having a moistening device and a coimter pressure rollerof at least single line width for printing said varying portion of the original, the other of said units having such of multi-line width for printing said constant portion of the original, means for adjusting the position of said printing units, manually operable elements and elements automatically operated by the rotation of saidprinting drum to displace said printing unit of single line width by a predetermined amount to selectively copy at least a single lineof said varying portion of the original, means for automatically fixing said printing units in the temporary printing position, a feed table for feeding sheets to be printed to said printing drum, means for adjusting said feed table with respect to said printing units, means for coupling said feed table with at least one of said units, conduit means for supplying a readily volatilizing solvent to said moistening devices, valve means for controlling the flow of solvent in said conduit means, a valve rodforeach of said valves for opening and closing the same, and means including a rotatable rod having a sector-like recess therein for actuating said valve rods and to control liquid through said conduits.

16. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizing solvent, the combination comprising a frame, a printing drum rotatably mounted in said frame, means for exchangeably holding a mirror script original around the circumference of said printing drum, means for rotating said printing drum, a pair of printing units adapted to be displaced in a direction parallel to the axis of said printing drum, each of said units including a moistening device and a counter pressure roller, means for adjusting the position of said units in said direction independently from one another, and means for automatically fixing said printing units in their temporary printing position.

1'7. In a rotary reprinting and copyin ma chine printing onto copy sheets previously moistened with a readily volatilizing solvent, the combination comprising a frame, a printing drum rotatably mounted in said frame means for exchangeably holding a mirror script original around the circumference of said printing drum, means for rotating said printing drum, a pair of printing units adapted to be displaced in a automatically fixing said printing lmits in. their a temporary printing position, and means for feeding copy sheets to be printed to said printing 18. In a rotary reprinting and copying machine printing onto copy sheets previously moisin a direction parallel to the axis of said printing drum, each of said units including a moistening device and a counter pressure roller, means for adjusting the position of said units in said direction independently from one another, means for automatically fixingsaid printing units in their temporary printing position, a feed table for feeding copy sheets to said printing drum, means for adjusting said feed table with respect to said printing units, means for coupling said feed table to at least one of said units, and means for feeding a readily volatilizing solvent to said moistening devices.

19. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizing solvent; the combination comprising a frame, a. printing drum rotatably mountedin said frame, means for exchangeably holding a mirror around the circumference of said printing drum,

means for rotating said printing drum, a pair tion independently from one another, means'i'or script original automatically fixing said printing units in their temporary printing position, a feed table, means for adjusting said feed table with respect to said printing units, means for coupling said feed table with at least one of said units, a conduit for each of said moistening devices for supplying a readily volatilizing solvent thereto, and means for controlling the flow of solvents in said conduits.

20. In a rotary reprinting and copying machine printing onto copy sheets previously moistened with a readily volatilizing solvent, the combination comprising a frame, a printing drum rotatably mounted in said frame, means for exchangeably holding a mirror scriptoriginal around the circumference of said printing drum,

' means for rotating said printing drum, a pair of printing units adapted to be displaced-in a direction parallel to the axis of said printing drum, each of said units including a moistening device and a counter pressure roller, means for adjusting the position of said units in said direction independently from one another, means for automatically fixing said printing units in their temporary printing position, a feed table, means for adjusting said feed table with respect to said printing units, means for coupling said feed table with'at least one of said printing units, a liquid conduit for each of said moistening devices for feeding readily volatilizing solvent thereto, valve means for each of said conduits, a valve rod for each of said valve means for openingand closing the same when actuated, and means including a rotatable rod having a sector-like recess therein for actuating said valve rods and to' control the flow of liquid through said conduits.

WHrHELM RITZERFELD.