US2029996A - Printing machine - Google Patents

Description

Feb. 4, 1936. s. FURMAN PRINTING MACHINE Fiiled March 30, 1952 7 Sheets-Sheet 1 4 INVENTOR Samuel Tu 7 an & %%w

ATT oRNEY Feb. 4, 1936. s, FURMAN PRINTING MACHINE '7 Sheets-Sheet 2 Filed March 30, 1932 u u u u INVENTOR Samuel Tarman %u I ATTORNEY I Feb. 4, 1936'.

s. FURMAN PRINTING MACHINE Filed March 30, 1932 7 Sheets-Sheet 3 INV ENTOR zl Fir-mE a ATTORN-EY Feb. 4, 1936. s. FURMAN PRINTING MACHINE Filed March 30, 1932 7 Sheets-Sheet 4 Inventor Samuel T'urman Feb. 4, 1936. s. FURMAN 2,029,996

PRINTING MACHINE Filed March so, 1932 7 Sheets-Sheet 5 lnuencor Attorney Feb. 4, 1936. s. FURMAN PRINTING MACHINE Filed March so, 1932 7 Sheets-Sheet 6 EV K 8 SH .5 mg @Q 0 Samuel F'urrnan Feb. 4, 1936.

S. FURM AN PRINTING MACHINE Filed March 30, 1932 7 Sheets-Sheet 7 Patented Feb. 4, 1936 2,029,996 rnm rmo MACHINE Samuel Furman, Worcester, Mass., United States Envelope Company,

assignor to Springfield,

Mass, a corporation of Maine Application March 30, 1932, Serial No. 601,945 25 Claims. (01. 101-228) shown in relation to the feeding mechanism. of a bag-forming machine in conjunction with, which the printing machine operates, said bag-forming machine being shown diagrammatically.

Fig. 2 is a left hand end elevation of the print- The present invention relates chines and particularly to machines for uniformly spaced impressions strip or web.

to printing maprinting on a continuous In prior devices of this character, the printing is efiected by passing the material to be printed between a printing roll and a latter urging the material into pressure roll, the contact with the printing surface on the printing roll. The web moves at the same speed printing roll so that a change as'the surface of the in the spacing of the impressions on the web involves a corresponding change in the size of the circumference of which must printing roll, the v be equal to the spacing of successive impressions. Thus, in order that a single machine may accommodate different spacing of impressions, it is necessary to provide a plurality of interchangeable various sized printing rolls, each of which prints successive impressions on the web in accordance ference of the roll.

principal objects of the present with the circum- It is accordingly one of the invention to provide for printing spaced impressions on a continuous strip or web with the spacings of the impressions independent of the size of the printing roll.

Another feature the printing of a plurality of se of the invention resides in ries of spaced im- I pressions by a plurality of printing operations which involves passing the web successively over a plurality of printing rolls, with said rolls in proper relation to locate the impressions made by each of said rolls in predetermined relation to each other.

Another feature resides in the arrangement of the printing machine for supplying the printed web under tension from said to the feeding mechanism of printing machine another machine whichoperates upon said web in accordance with the spacing of the impressions thereon,

as, for

example, a machine which .forms envelopes with the printed impression on the front thereof. This feature involves the operation of the printing machine in" timed relation to the mechanism of the other machine and the maintenance of the printing mechanism in proper spaced relation to thefeeding mechanism of the other machine so that'the spaced printed impressions will be properly located within the other machine.

Other and further objects and the invention will appear from tailed description taken the following dein connection with the accompanying drawings. in which:-

Fig. 1 is a front elevation of a printing machine embodying the invention. said machine being advantages ofing machine of Fig. 1.

Fig. 3 is an enlarged detail view of the mounting for one of the printing rolls. 4 Fig. 4 is a vertical section along the line 4-4 of Fig. 2, through the printing machine.

Fig. 5 is a'diagrammatic view showing the gear and chain drives for the printing machine.

spacing the ink Fig. 6 is a detailed view of a mechanism for transfer roll from the printing roll in inoperative position. i

Fig. '7 is a view corresponding to Fig. 6 showing the mechanism in operative position.

Fig. 8 is a detail of a portion of the mechanism shown in Figs. 6 and 7.

Fig. 9 is a detail with the mechanism for of one of the printing rolls locking said roll against rotation in one direction.

Fig. 10 is a detail ing the web through of the the printing machine.

mechanism for feed- Fig. 11 is a detail of the adjustment of one of the printing rolls.

Fig. 12'is a plan view of the printed web before it enters the feeding mechanism of the bagforming machine, showing the sions in predetermined printed impresrelation to cuts in said web made by said bag-forming machine.

Fig. 13 is a plan view of a completed bag into which the web is formed. I

Fig. 14 is a view corresponding to Fig. 1 showing the printing machine in a modified form in conjunction with a machine which moves the web intermittently in the formation of a ,bag.

Fig. 15 is a detail of the mechanism for maintaining the web under te nsion.

Fig. 16 is a view corresponding to Fig. 12 showing the web in the machine bf Fig. 14.

Fig. 1'7 is a plan view similar to Fig. 13 showing a completed envelope formed by the machine of Fig. 14.

Like reference characters refer to like parts throughout the drawings.

The invention is disclosed in connection with a bag-forming machine which operates on the web after the printing operation constant speed the web is fed at a and through which by constant speed rolls, the actuation of which will be more clearly pointed out hereinafter.

Referring first to Fig. l, theweb l, which is of any suitable material, is drawn from a ro the printing machine.

11 2 over a feed roll 3 in From the feed roll, the

web is carried over the surface of a plurality o1- printing rolls 5 and 6, around an idler 1 which maintains the web tight, and over idlers 8 and I U to the rolls II in the bag-forming machine, said rolls H being driven at a constant speed from the main drive shaft |2 of said bag-forming machine.

The printing machine will be first described. Referring to Fig. 2, the machine embodies spaced frame members l3 which provide bearings for the several mechanisms by" which the printing operation is procured. As best shown. in Fig. 5, the main drive shaft 4 is journaled in the frame members and is actuated in timed relation to the rolls II by a chain l5 from the drive shaft |2 of the bag-forming machine. The drive shaft |4 carries a gear l6 adjacent one end thereof which meshes with an idler gear l the latter engaging a gear |8 equal in size to the gear l6 and carried by the end of the printing roll shaft 6', whereby each rotation of the drive shaft M procures a single rotation of the printing roll 6. The feed roll 3 and the printing roll 5 which are the same diameter as the roll 6, as shown in Fig. 4, are all rotated at the same rate of speed by a chain 23, Fig. 5, which passes over sprockets 2| and 22 on the printing roll shafts 5 and 6' and a sprocket 23 on the end of the feed roll shaft 3', whereby the surface speeds of the feed roll 3 and the printing rolls 5 and 6 are all equal. An idler sprocket 24 is located between the sprockets 2| and 23 and engages the chain 20 to keep said chain tight.

The feed roll 3 is arranged to feed a predetermined length of web to the printing rolls 5 and 3 for each rotation of said roll 3, although the length of the web fed is entirely independent of the circumference of the roll. Referring to Figs. 1 and 2, the feed roll shaft 3 is journaled at its opposite ends in the frame members l3 and a transverse rod 25 is journaled in the frame members l3 in parallel relation to the roll 3 and carries onrits forward end thereof an arm 26 which is clamped against movement on said rod by a clamping screw 21. Spaced arms 28 and 30 which are secured against rotation on the rod 25 between the frame members 3 provide alined bearings at their outer ends for a movable rotating roll 33 which extends parallel to and is arranged to engage the surface of the feed roll 3. The roll 33 is actuated at the same surface speed as the roll 3 by means of intermeshing gears 34 and 35 secured to the feed roll shaft 3' and said moving roll shaft 33' respectively. The web passes between the feed roll 3 and the movable roll 33, and engagement between said rolls as the movable roll 33 is brought into contact with the surface of the feed roll 3 procures a positive feeding movement of the web toward the printingrolls, at the speed of said printing rolls.

The movable roll 33 is brought into contact with the surface of the feed roll 3 during a portion only of each rotation of said feed roll to procure a positive feed during the printing of each impression. As shown in Fig. 1, the main I drive shaft l4 carries on its forward end an adjustable cam 38 which is engaged by a roller 31 mounted on a stud 38 on the lower end of a connecting rod 39, the upper end of said rod being attached to the arm 26. The lower end of the connecting rod 39 beyond the roller 31 provides parallel arms 43 and 4| which extend on opposite sides of the drive shaft to support the roller 31 in proper position on the cam 36. As the roller 31 passes onto the raised po tion of the cam 36, the rod 39 is urged upwardly, turn- 3 ing the transverse rod 25 counterclockwise, and

pressing the movable roll 33 into contact with the surface of the feed roll 3, to procure movement of the web at the sped of the feed roll 3. As best shown in Figs. 4 and 9, a small longitudinal groove 42 is provided in'the feed roll 3 and is positioned so that the edge of said groove is engaged bythe movable roll 33 as said movable roll 33 is brought into engagement with the driving roll, thereby procuring a positive movement of the .web.

The printing machine in the position of Fig. 1 is at the start of the feeding movement of the web through the printing machine just as the roll 31 has been raised by the cam 36, thereby bringing the movable roll "33 into engagement with the feed roll 3 at which time the edge of groove 42 is directly beneath said roll 33. From this point, the web moves at the speed of the feed roll 3 until the cam 36 is rotated to bring the depressed portion of the cam beneath the roller 31 which separates the feed roll 3 and the roll 33 to allow movement of the feed roll 3 relative to the web As the drive shaft l4 rotates at the same rate of speed as the feed roll 3, the positive feeding movement of the web occurs through a portion only of each rotation of the drive shaft while the movable roll is in engagement with said'feed roll.

The length of web to be fed at each rotation of the feed roll 3 ment of the cam 36 which, as best shown in Figs. 1 and 2, comprises a pair of similarly shaped disks 43 and 44, each having projecting portions thereon and rotatable relative to one another to bring the projecting portions more or less in.

alinement to shorten or lengthen the projecting portion of the cam 36.

The roller 31 extends over the entire width of the two disks 43 and 44, which are locked in adjusted position by a clamping bolt/45 extending through an arcuate slot 46 in the disk 43 and'being screw threaded in the disk 44, Fig. l. The engagement between the feed roll 3 and the movableroll 33 is determined by adjustment of the length of the connecting rod 39 or by'adjustment of the location of the arm 26 relative to the transverse rod 25. a

From the feed roll 3, the web is carried to the printing roll 5 which, in the construction shown, is arranged for gravure printing. Referring to Figs. 1 and 2, the ends of the shaft 5' for the gravure printing roll 5 are journaled in bearings provided by the frame members l3 and a transverse rod 50 is mounted in hearings in the frame members l3 in parallel relation thereto. Said rod 50 has arms 5| and 52 secured thereto between said frame members l3, and the ends of said arms 5| and 52 carry ball bearing members is determined by the adjust- 53, see Fig. 10, which support a rod 55' having 60 a pressure roll 55 parallel to roll 5 mounted thereon, whereby said roll 55 is free to rotate in the arms 5| and 52. As shown in Figs. 2 and 10, the rod 50 also carries a projecting arm 51 secured thereto with the outer end of said arm 65 connected by an adjustable link 58 to an arm 60 mounted on the transverse rod 25 and movable therewith. Thus, as the movable roll 33 is brought into contact with the feed roll 3, the

pressure roll 55 is brought into contact with the 70 83 carries an arm 62, said members being slidable longitudinally relative to one'another and being secured in adjusted position by a clamping bolt 63 tends through a slot 64 in the arm 6I, and which is tightened to hold said members 6| and 62 member I carried by a rod 1 I, the ends of which are supported by the frame members I3. The doctor blade 69 is normally'held in engagement with the gravure roll at a predetermined pressure by a roller I2 carried by an arm I3 on the rod II, said roller engaging a member I4 which provides a plane surface parallel to the rod II, the member I4 being resiliently supported in position by springs I5 beneath said member, said springs I5 and the member 14 being carried by a bracket I6 secured to one of the frame members I3, Fig. 9. I

The doctor blade is reciprocated longitudinally over the surface of the gravure roll to avoid uneven wear on said roll. As best shown in Figs. 2 and 5, the feed roll shaft 3' carries a gear 'I'I meshing with a gear I8 carried on a stub shaft 19 journaled in one of the frame members I3. A second gear 80' on the shaft I9 meshes with a gear 8| rotatable on the feed roll shaft 3, said gear 8| carrying a cylindrical cam 82. A shaft 84 secured thereto and the end of said arm supports a roller 85 in contact with the surface of the cam 82, the roller 85 being maintained in contact with said cam by a spring 86. The lower end of a second arm 81, secured on the shaft 83, engages a grooved collar 88 on the doctor rod H so that as the roll shaft 3' is rotated, the cam 82 rocks the shaft 83, whereby the doctor blade is reciprocated slowly over the surface of the gravure roll.

The gravure roll support is arranged to permit a change of rolls when the impressions on the web are to be changed. To this end, as best shown in Figs. 2 and 3, the gravure roll shaft 5 instead of being directly journaled in the frame members is carried by supporting members 90 and 9| which are journaled in the frame members l3. The support 90, which carries on the outer end the sprocket 2I, has an axial bore 92 in the inner end thereof, with a portion of the bore defined by a removable cap 93 secured in position by screws 94, removal of the cap permitting removal of the end of the shaft 5' from the bore 92. As the shaft 5 is clamped against rotation by the cap 93, the rotation of the gravure roll 5 issecured through rotation of the support 90 by the sprocket 2I.

The support 9| has a cylindrical recess 95-axially therein in which a sleeve 96 is slidable, and the latter, when positioned in the left hand end of the recess 95, is arranged to receive and support the right hand end of the shaft 5', with said sleeve locked in this position by a set screw 91. A cut-out portion 98 in the support 9|, provides an opening in the side of the recess 95 through which the end of the shaft 5 may be withdrawn upon release of the set screw 91, and axial movement of the sleeve 96 to the right out of engagement with the shaft 5'. Upon removal which exof the cap 93, said shaft 5 may be carried slightly to the right, as indicated in Fig. 3, to withdraw the left hand end of the shaft from the end of the bore 92, after which the roll shaft 5' and the roll 5 thereon may be withdrawn from the members 90 and 9 I. Thus the construction shown provides for accurate centralization of the shaft 5' relative to the axes of the supportingmembers 90 and 9| and permits replacement of the gravure roll by a similar roll having a different engrav-v ing thereon.

The gravure roll 5. is prevented from counterclockwise rotation while the doctor blade is in contact with said roll by mechanism most clearly shown in Fig. 9. Referring to Figs. 3 andv 9, one of the frame members I3 has an annular ring I00 secured thereto, said ring surrounding the supporting member 90 for the gravure roll shaft 5'. The ring I00 is provided with a substantially vertical slot IOI which is tangential to the cylindrical surface of the supporting member 90 at a point substantially in the horizontal plane of the gravure roll axis. A roller or cylindrical pin I02 is received in the slot IOI in parallel relation to the axis of the supporting member 90, and

said pin is normally urged by gravity against the surface of the supporting member 90 and wedges between said member and the side of the slot to lock said member 90 against counterclockwise rotation.

The doctor blade may be rotated to inoperative position after the removal of the bracket I6 carrying the member 14 which supports said blade in position, and, hen said blade moves to inoperative position, the pin I02 is withdrawn from locking position. Referring to Fig. 9, as the doctor blade is swung to inoperative position, a cam I03 secured to the rod II and rotatable with the doctor blade, engages and elevates the end of a lever I04, which carries a roller I05 in engagement with said cam I03. The opposite end of said lever I04 is connected by a link I06 to a lever I01 which, as in the case of the lever I04, is pivoted on the frame member I3. The free end of the lever I01 extends beneath the pin I02 so that as the cam I03 elevates the roller I05, the cylindrical pin I02 is raised out of engagement with the supporting member 90, thereby permitting the gravure roll 5 to be turned counterclockwise, the doctor blade being out of contact with said roll. A spring I08 holds the lever I01 out of engagement with the pin I02 when the doctor blade is in engagement with the gravure roll.

Following the gravure printing operation, which has been described, the web is carried to a second printing mechanism which procures a second printing operation on the web. In the construction shown, the second printing operation is done by the printing roll 6 which, as shown in Fig. 1, is journaled in bearings provided by the frame members I3. This roll 6, Fig. 4, carries on the surface thereof a flexible member III tightly secured to the roll with relief printing surfaces II2 secured to and extending beyond the member III to provide for relief printing on the web. A pressure roll II3 parallel to the printing roll 6 is freely rotatable on a shaft II4, the ends of which are supported in the frame members I3,

and urges the web I into contact with the printing surfaces on the printing roll 6. Since the printing roll 6 and the pressure roll II3 are in fixed relation to each other during'the operation of the machine, the surface .of the printing roll is out of engagement with the surface of the ,Referring to Figs. 1 and 11, a bell crank lever' I I5 is pivotally mounted at one end on one of the frame members I3 and a similar bell crank lever, not shown, is pivoted in alike manner on.the other frame member I3, said levers providing bearings for opposite ends of the printing roll shaft 6. As the position and adjustment of the levers is the same for both, only the lever H5 will be described. A depending arm on the lever II5 has a horizontal slot II 6 which receives an eccentric sleeve II'I carried on a stud bolt II8 on the frame I3. flange H9 by which said sleeve is turned on the bolt I I8, to rock said lever II5 about itspivotal support on the frame, to vary the spacing between the printing roll 6 and the pressure roll H3, said sleeve being clamped in adjusted position by tightening the bolt I I8,

Ink or printing fluid is transferred to the printing surfaces on the relief printing roll from a fountain roll I20, the lower-surface of which extends within a tank or pan I2I supported onthe frame in the manner disclosed with reference to tank 65. The surface of the fountain roll I is in engagement with a transfer roll I22 which engages the printing surfaces II2 of the printing roll. As best shown in Fig. 5, the fountain and transfer rolls I 20 and I22 are driven in unison with the printing roll 3. The printing roll shaft 6 carries the gear I8 which meshes with a gear I24 on the transfer roll shaft I22 for moving said transfer roll at the same surface speed as the printing roll, and a gear I25 on the fountain roll shaft I20 meshes with the gear I24 on the transfer roll to drive the fountain roll I20 at a surface speed slightly less than the surface speed of the transfer roll to procure a creeping action between said rolls which maintains the surface of the transfer roll free from accumulations of dried printing material.

When the machine is brought to rest, the transfer roll is manually spaced from the-printing roll and the fountain roll. Referring now to Figs.\ 6 and 7, the fountain roll shaft I20, which is journaled in the-frame members I3, carries eccentric sleeves I26 located between said frame members with one sleeve adjacent each of said frame mem-.

bers. Only one of the sleeves I26'is shown since the mechanism associated therewith is duplicated for either end of the shaft I20. Each eccentric sleeve I25 is carried by a disk I2I which is urged clockwise by a spring I23, the latter being secured at one end to the frame member I3, said disk being held in adjusted position by an adjusting bolt I29 .in a lug I30 on said disk, said bolt engaging a portion of the frame member I3 to limit the clockwise rotation. Each eccentric sleeve I26 provides a support for an upwardly extending link I3I in which the end of the transfer roll shaft I22 is journaled. Adjustment of the bolt I29 turns the eccentric sleeve and thereby raises or lowers the link I3! to move the transfer roll toward or away from the fountain roll.

The link I3I on each end of the fountain roll carries at the upper end thereof a roller I 32 which is engaged by a latch I33, the latter being pivotally mounted on the printing roll shaft 6, and engage The sleeve III has an annular ment between said latch I33 and the roller I32 moves the link I3I clockwise to space the transfer roll from the printing roll. Movement of the latch I33 into engagement with the roller I32 is procured by manual downward movement of an arm I34 which carries a handle I35 on the end thereof and is attached to a transverse shaft I33 supported in the'frame I3 to which shaft 9. second arm I31 is secured, the end of the latter arm I31 being' connected by a link I 38 to the latch I33. Depression'of the handle I35 moves the latch I33 downwardly into engagement with the roller I32. In this position the arm I34 is locked by a pivoted lockingmember I39 on the frame member I3, said member I39 engaging the arm I34 in its lower position:

Referring to Fig. 8, the link I3I is urged toward the printing roll 6 normally to support the transfer roll in contact with the printing surfaces on said printing roll 6 by a spring I40 which engages at one end a lug I4I mounted on a stud I42 on the frame member I 3 with the opposite end of said spring engaging the upper end of the link I3I. The lug I M carries an overlying flange I42 which is provided with a slot I43 receiving a pin I44 on the end of the link I3I to limit the rocking movement of the link I3I about the eccentric sleeve I26. The transfer roll I 22 is aecordingly held in contact with the printing surface of the printing roll 6 when the latch I 33 is out of engagement with the roller I32.

The link I38 carries a pawl I45 "pivotally mounted thereon, said pawl normally depending in engagement'with a cut-out portion I46 of the disk I21 so that, as said link I38 is moved downto supply the web at a constant speed to a machine operating in conjunction therewith. As best shown in Figs. 1 and 4, the idler or tension roll .'I

over which the web I is carried is journaled in the ends of arms I47 carried by a shaft I48, the ends of which are mounted in the frame members I3. A spring I49 engages a pin I50 on said shaft I48 and tends to turn said shaft clockwise, thereby maintaining a tension on the web as it is fed through the printing machine and taking up the slack in the web, since the web moves at a faster rate during'the printing operation than the cons t speed at which the web is carried away from the machine.

In order that successive impressions on the web shall be properly spaced apart, a fixed distance is established from the feed roll 3 to the constant speed rolls I I between which the web moves at a uniform speed, said feed roll 3 and the printing mechanism being driven in timed relation to the constant speed roll as above stated. To this end the tension roll 1 is returned to a predetermined position at the beginning of each successive printing operation. Referring now to Fig. 4, the shaft I48 carries an arm I50 secured to a connecting rod I5I which carries on its opposite end a roll I52 engaging a groove I53 ina cam I 54v which is rotatable with the drive shaft I4, thereby procuring movement of the tension roll I in predetermined relation to the rotation of the drive shaft.

spacing between the At the start of the feeding operation of the web through the printing-machine, the roll I52 is in a portion of the groove I53, the spacing of which corresponds to the diameter of the roll, whereby the connecting rod is held against movement and the tension. roll is accordingly positively located in the same position t the beginning of each feeding operation. As soon as the positive feeding movement of the web begins, the roll I52 enters a portion of the cam groove I53 which is substantially wider radially than the diameter of the roll and the tension roll I is free to move in response to the spring I49 to keep the web tight. When the cam I54 has completed the greater part of its revolution, the roll I53 again enters a narrowing portion. of the groove which brings the tension roll I into the same predetermined relation which it occupied at the beginning of the preceding feeding movement. The tension roll is also'positively located at the beginning of the feeding movement by an adjusting bolt I55 which is carried by an arm I56 secured to the shaft I48.

The constant speed rolls II which engage the web positively at all times carry a length of web therebetween, for each rotation of the drive- -shaft I2, equal to the desired spacing of the impressions on the web, and the roll 3 is made to feed substantially the same length of web through the printing machine by adjustment of the cam 36. Accordingly, between eachsuccessive positive feeding movement of the roll 3 the web comes to rest in the printing machine, although it is being drawn away from said printing machine at a constant speed, since the tension roll 1 permits the web to be drawn away from said printing machine. It is desirable, however, to adjust the cam 36 so that the length of web fed by the positive feeding movement of the roll 3 is slightly less than the desired spacing of the impressions on'said web.- Thus, between successlve feeding movements of the roll 3, the web is moved slowly through the printing machine by the rolls II (the web then being free to pass through said printing machine by reason of the feed roll 3 and the movable roll 33 and also between the printing rolls and the pressure rolls therefor), thereby preventing the web from stopping entirely and avoiding the for starting the web excessive tension necessary from rest.

When the length of web fed by the roll 3 is substantially equal to the length of web fed by the rolls II, the arrangement of the machine causes the web to be in motion through the printing .machine at the start of the feeding movement by the roll 3. As above pointed out, thenarrowing portion of the groove I53 in the cam I54 positively returns the tension roll 'I to its initial position and this positive return movement is so timed that the rolls II begin to draw the web through the printing machine to start said web in motion before. said roll I reaches initial position. thatthe adjustment of the cam 36 is such that the length of web fed through the printing machine is equal to or less than the length of web passing between. the constant speed rolls II,

whereby the spacing of the rolls in the printing machine to permit free movement of the web therethrough permits control of the rolls I I. In this manner, the constant speed rolls II move the web through the printing machine to establish the desired length of web, even though the length ofthc web fed a sprock It will be apparent the web to be underthe,

through the printing machine is shorter, and thus any accumulated error in the different lengths is avoided.

It will be noted that the length of the web fed by the printing machine is varied by adjustment of the cam 36, this single adjustment taking care of any desired change in length of the web within the limits of the machine. of the entire printing machine is involved except the adjustment of the individual printing rolls toward or away from each other to vary the location of the separate impressions relative to one another on the web. In this manner, the printing machine may be quickly adjusted for spacing the successive impressions on the web a greater or less distance apart.

The relative position of the gravure and relief printing impressions on the web is varied by adjustment of the printing rolls 5 and 6 toward or away from each other. As best shown in Figs. 1 and 2, the frame members I3 each comprise a main frame portion I51 which supports therelief printing mechanism, the tension roll I and the feed roll 3, and a movable frame portion I58 No other adj ustment 'of web fed by the separate feeding mechanisms which supports the gravure printing mechanism.

I58 is connected at its upper I5I of the frame by a bolt The movable portion end to the main portion I59 which extends through a longitudinal slot I60 provided in the main portion I51. The lower edge of the movable portion I58 is slidable along a way I6I provided by the machine and a bolt I62 extends through a slot I63 in the lower end of the movable portion I58. The opposite movable portions I58 of the opposite frame members I3 are caused to move together by turning movement of which carry the gravure printing mechanism being locked in adjusted position by tightening of the bolts I59 and I62.

The drive for the feed roll 3 and the printing I rolls 5 and 6, above disclosed, is not interfered with by the adjustment of the gravure mecha-- nism since the idler 24 is carried on the movable portion I 58 and has its periphery in vertical alinement with the sprocket 2I on the gravure roll shaft 5 and in horizontal alinement with the 23 on the feed roll shaft 3' so that regardl ss of the position of the gravure roll, the chain is maintained at the desired tension.

The above described printing machine is arranged tooperate in conjunction with a suitable bag-forming machine diagrammatically shown in Fig. ,1 which operates upon the web I to form a bag of the type shown in Fig. 13. Fig. 12 shows the web I with the spaced impressions I68 formed by the gravure printing roll 5 and similarly spaced impressions 6. The web I is provided with opposed notches IIII corresponding in spacing to the spacing of the impressions I68 and I69, said notches being located between successive printed impressions. The web in this form has the opposite edges I II of the web folded over onto the central portion I12 I69 formedby the relief printing roll- I 69 may be properly located on the front of the,

finished bag, the printing mechanism is driven in timed relation to the mechanism which formsthe web into the bag as above pointed out. Referring now to Fig. I, which illustrates the bag-forming 1 machine diagrammatically, the constant speed rolls I I between which the web I is fed are driven from the drive shaft I2 for the bag-forming machine through an intermediate idler gear I14 which meshes with a gear I14 on the shaft I2 and a gear I15 on the shaft I I' for the lower constant speed feed roll I I. The size of the gear I14 is variable to change the rate of speed of said constant speed rolls for different lengths of bags, in order that the length of web passing between said rolls i II for each rotation of the drive shaft 52 shall be equal to the desired spacing of the printed impressions. As shown in Fig. 1, the drive shafts i2 and id each carry similarly sized sprockets I15 over which the chain I passes, so that the drive shafts rotate at the same rate of speed.

After the web i leaves the printing machine and is carried over the idler 8, it passes downwardly over the idler roll i d which presses a longitudinal edge of said web against a gumming roll I16 for the application of adhesive material to said edge for securing opposite edges of said web together in the formation of the bag. Following the gumming operation; the notches I are formed in the opposite sides of the web by rotary choppers I11 carried on shafts I18 (only one chopper and shaft being shown) which are actuated in timed relation to the drive shaft I2- in any suitable manner, said choppers cooperating with stationary blades I19 to remove one pair of opposed notches I10 for each rotation of said drive shaft. From the choppers I11, the web is drawn, by the rolls II, through a feeding mechanism I80 comprising a series of stationary folding blades of the usual construction which fold the web longitudinally and forms the reentrant creases in the opposite edges of the bag and the rolls II beyond the folding mechanism I80 press the folded web flat to cause the overlapping edges of the web to adhere together. Beyond the rolls II the web is passed between spaced folding and cutting rolls I8 I, which sever the web along lines I13 and fold the bottom of the bag. The upper roll' I 8I carries a folding blade I 82 which engages the web in the position of the bottom fold of the bag and presses the web adjacent said fold into a gripper I83 carried by the lower roll I8 I, the web being thereafter severed by a knife I84 in the upper roll I8I which cuts the web along the line I13 by engagement with a block I85 in the lower roll I8 I, thereby severing a substantially completed bag from the end ofthe web.' The rolls I8I are driven in timed relation to the drive shaft I2 by a chain I86 which engages sprockets, not shown, on the drive shaft I2 and on the shaft I8I' for the lower roll I8I, saidsprockets being equal in size so that one rotation of the drive shaft I 2 procures 8. correspond?- ing rotation of the rolls I8I, said folding and cutting operation occurring once for each rotation of the drive shaft I2 and in timed relation thereto.

The proper location of the spaced impressions on the finished bag is dependent upon the positions of the choppers I11 and the rolls I 3| relative to the printed impressions on the printing rolls5 and I5. The constant speed rolls II, as above stated, are in predetermined timed relation to the choppers I11 and also to the rolls Ill by reason of the connections from the drive shaft I2, and the impressions on the web are properly located on the bag by variation of the timed relation of the printing operation and the operations of the bag-forming machine. The change in timing to position the impressions is procured by shifting the sprocket I angularly thereby varying the timeon the drive shaft I4, of the printing operation relative to the operation of the bag-forming machine, and thus locating printed impressions in desired position on the web in relation to the notches formed by the choppers I11-and to the bottom fold formed by the rolls NH.

The operation of the printing machine in conjunction with the bag-forming machine which will be clear from the above description will be briefly outlined. In the position of the printing machine shown in Fig. l, the positive movement of the web through the printing machine has been initiated by the cam 36 on the drive shaft I4 which has urged the moving roll 33 into contact with the feed roll 3. Prior to this movement of the roll 33 the web is drawn slowly over the roll 3 in response to the pull exerted on the web by the constant speed rolls II with the tension roll 1-moving counter-clockwise as the web is drawn through the rolls II. Just as the moving roll 33 engages the feeding roll 3, the tension roll 1 is brought to the predetermined position of Fig. 1, to establish a fixed length of web between the constant speed rolls I I and the feed roll 3. From this position, the web I roll 3 at the surface speed of the printing rolls and in contact with the printing surface thereof. the pressure roll 55 having been moved into engagement with the surface of the printing'roll 5 at the beginning of this positive movement of the web. As the printing rolls 5 and 5 are rotated continuously and at the same speed as the feed roll 3, the printing surfaces II2 on the printing roll 3 are brought into contact with the pressure roll II3 during the positive movement of the web by the feed roll 3, and printing by these surfaces and by the gravure roll 5 occur without blurringof the impressions. The web during this feeding movement moves faster than it is drawn between'the constant speed rolls II sion made on the web by the roll 5, the relative position of the impressions being varied by movement of the rolls 5 and- 6 toward or away from each other, as above disclosed.

is fed by the feed,

The positive feeding movement of the web 4 continues with the slack taken up by the roll 1 until the roller 31 engages the depressed portion of the cam 36 when the moving roll 33 is separated from the driving roll 3 and the pressure roll 55 separated from the gravure roll 5, the pressure roll II3 being then out of contact with the printing surface II! of the printing roll 6. The roll 3 is provided with a brake I 36 and following the i junction with separation of the feed roll 3 and the roll 33, the.

rate of movement of the web is materially'decreased by the brake, whereby the idler roll 1 starts its return movement to the position of Fig. 1, the web being drawn from the printing machine by the rolls II. This return movement of roll 1 occurs at a predetermined rate since the roll I52 is in the narrow'portion of the cam groove I53 and the return rate is such that the rolls II draw the web I slowly through the printing machine to avoid complete stopping of the movement of the web through said machine. Just as the printing machine finishs one complete printing operation, the machine reaches the position shown in Fig; 1, with tension roll 1 in positively located position for the beginning of a subsequent operation which is carried through in the manner above described.

The spacing of the impressions on theweb is thus determined by the movement of the web between the rolls II which, as above pointed out, move the web a distance equal to the spacing of successive impressions on the web for each rotation'of the drive-.shaft .-I2 and accordingly for each rotation" of the"drivei'shaft I4 in the printing machine. After the'printing operation, the web is notched by the choppers I11 and thereafter folded, in the formationof a bag, by the folding mechanism I80 which turns in the sides and by the end-folding mechanism on the rolls I9I. As above pointed out, if the printed impressions are not properly located on the front of the bag, as shown in Fig. 13, the timing ofthe printing machine relative to the drive shaft of the bag-forming machine is varied by adjustment of the sprocket I15 so that the position ofthe printed impressions relative to the choppers I11 is varied and the printed impressions are properly located on the finished *bag.

In the modification shown in Fig. 14, the printing machine corresponds substantially in construction to the printing machine above disclosed and the same reference characters are applied to this printing machine which operates in conthe intermittently actuated feed rolls of a bag-forming machine of the type disclosed, for example, in the Novick Patent No.

1,691,027, granted November 6, 1928. In this arrangement of the printing machine, however, the roll 1 remains stationary and operates merely as an idler roll, with other mechanism, as will hereinafter appear, operating to maintain the web under tension. In this modification, the web I passes from the tension roll 1 of the printing machine around an idler I81 and over a second idler I88, both of said idlers, as well as said roll 1, being fixed in position, and thence-around idlers I90 and I9l, the latter being movable, to the feed rolls I92 of the bag-forming machine between which the web is intermittently fed.

As best shown in Fig. 15, the drive shaft I93 of the bag-forming machine carries a disk I94 having a radially adjustable pin I95 on which an arm I96 is pivotally mounted. The arm I96 has a rack I91 formed thereon which engages with a pinion I98 mounted for rotation on the lower feed roll shaft I92, said pinion carrying a pawl 200, which engages with a ratchet 20I secured to the shaft I92. With the drive shaft I93 rotating clockwise, the shaft I92 and accordingly the feed rolls I92 are rotated clockwise during half of each revolution. of the drive shaft I93 and the pinion I98 rotates on the shaft I92 during the other half of the revolution of said drive shaft.

In order to take up the slack and to maintain the web under tension between the printing machine and the intermittently actuated feed rolls I92, the idler roll I9I, above described, is mounted for free swinging movement. Said idler roll I9I is carried by arms 202 secured to the shaft I90 on which the idler roll-I90 isrotatably mounted. The weight of the idler roll I9I and the arms 202tend to swing said roll clockwise about the shaft I90 to maintain the web I under tension and a pin 203 beneath one of the arms 202 prevents excessive downward movement of said roll IOI, said pin positively locating said roll I9I at the beginning of the feeding movement of the web between the rolls I92. The shaft I90 carries a depending arm 204 pivotally mounted thereon, said arm having a connecting rod 205 connected thereto, the other end of the rod 205 supporting a roller 206 in engagement with a cam 201 on the drive shaft I93. The rod 205 beyond the roll 206 provides spaced fingers 20.8 which extend on opposite sides of the shaft I93 to support the roller 206 in proper relation to the cam. A-spring 2 I0 normally urges the rod 205 toward the right to maintain'the roll 206 in engagement with the cam 201 at all times. A pin 2 on an arm 2I2 integral with one of the arms 202 is engaged by the arm 204 as the latter moves to the left to procure positive downward movement of the roll I9I, said roll being free to move upwardly as the arm 204 moves to the right under the influence of the spring 2 I0.

The bag-forming machine is driven intimed relation to the printing machine by a chain 2! which passes over sprockets 2I4 and 2I5 on the drive shaft I93 of the bag-forming machine and the drive shaft I4 of the printing machine respectively, said sprockets being equal in size so that a single rotation of the drive shaft I93 procures a corresponding rotation of the drive shaft I4. The machines are so timed that the intermittently actuated feed rolls I92 begin the feeding operationat substantially the same time that the feeding movement of the web occurs in the printing machine, as will be apparent from a consideration of Fig. 14, in which the printing machine is shown just at the beginningof the feeding operation, and the actuating mechanism for the intermittently actuated feed rolls I92 of the bag-forming machine. is in a position to start the movement of said intermittently actuated rolls.

From a consideration of Figs. 14 and 15, which represent the parts in the same relative positions,

the printing machine is just beg nning the posi- I tive movement of the web I through said machine with the tension roll 1 positively located to procure. a predetermined length of web between the feed roll 3 and the intermittently actuated rolls I92 of the bag-forming machine. At the same time, the roll I9I is positively located, as most clearly shown in Fig. 15, since the pin 2 is in engagement with the arm 204 so that upward movement of the roller I9I, except as governed by the cam 201 on the drive shaft I93, is prevented. As each rotation of the drive shaft I93 of the bag-forming machine moves a length o-f web I between the rolls I92 equal to the length of web necessary for the formation of a complete bag, the spacing of the impressions formed by the printing machine will be equal to the length of web necessary for the formation of the completed bag.

In order to locate the printed impressions 22I being spaced in clockwise, the web is fed through the rolls I87 is carried by arms 2I6 mounted on a shaft 2II carried by the frame 2; which provides the support for the roll 2 from which the web is drawn, and the position of the roll I81 is varied by swinging said roll about the shaft 2I'I and locking the roll in adjusted position, thereby varying the length of web between the printing rolls 5 and 6 and the intermittently actuated rolls I92 of the bag-forming machine.

Referring now to Figs. 16 and 17 which show the type of bag formed on this machine, the web I has spaced impressions 220 formed by the grayure roll 5, each rotation of the gravure roll providing opposed impressions transversely in alinement on the web and similarly the web has transversely alined impressions 22I formed by the relief printing roll 6,

accordance with the gravure impressions 220. After the web has passed between the intermittently actuated feed rolls I92,

the web is cut longitudinally along the line 222 to.

define two strips, each of which is formed into bags in the bag-forming machine. After the web is out along the line 222, the outer edges of each strip are folded along the lines 223 and the strip is subsequently folded transversely along the lines 224 to form the completed bag of Fig. 17 With the printed impressions 220 and 22I on the front side thereof, each completed'bag being cut from the Web along the lines 225, the formation of such a bag being fully described in the above noted Novick patent.

,The operation of the machine of Figs. 14 and 15, which will be clear from the above description will be briefly summarized. The drive shafts I4 and I93 are in the relative angular positions shown. With the drive shaft Win the position for the beginning of the positive feeding of the web I through the printing machine, the drive shaft I93 is in a position to initiate the rotation of the rolls I9 as shown", to procure a feed ing movement of the web between said rblls. In this position, the length of web between the feed roll 3 and the intermittently actuated rolls I 92 is positively determined by the positive location of the roll I9I against the pin 203 in response to the rotation of the cam 20'! which has its high point directly beneath the roll 206 when the machine. is in the position shown, the roll 'I being fixed in position. As the drive shaft I93 rotates I92, the roll I 9| moving upwardly from its lowermost position to allow the web to pass between said rolls. The upward movement of the roll I9I is successive relief impressions possible since the high point of the cam 20T- passes from beneath the roll 206 as the feeding movement of-the r olls I92 is initiated. Continued feeding movement ofthe web through the rolls I92 continues to raise the roller I 9I until the end of the feeding movement at which time the roll I 95 begins its downward movement under the influence of gravity to maintain the web tight as it is fed from the printing machine. It will be noted that the cam 36 .of the printing machine is so arranged that the web is fed through at least one-half of each rotation of the drive shaft, thus said web is always fed through the printing'machine at a slower rate than the feeding movement between the rolls I92. The roll I 91 acts to maintain the web under tension by its weight and also to establish a predetermined length of web between the feed roll 3 and the rolls I92 at the beginning of each feeding movement of the web, said roll being. positively located As the drive shaft I93 approaches the position shown in Fig. 14, the cam 20I urges the roller I 9I downwardly so that at the beginning of each successive feeding movement of the web, said roller is in its lowermost position in engagement with the pin 203 to establish the predetermined length of web between said machines. "The proper positioning of the roll I9I accordingly procures the predetermined spacings of the impressions on the web in accordance with the length of web passed between the rolls I92 at each actuation thereof. In this modification, as in the preceding modification, the free movement of the web through the printing ma chine between successive printing operations prevents excessive tension on the web between said machines to break said web, as a result of the by the cam 201;

printing machine feeding too short a length of web, said rolls I92 acting as master rolls. Thus by the provision of the positive downward movement of the roll I9I,'any inaccuracy in the relative lengths of web fed through the printing machine and between the rolls I92 is compensated for, and by adjustment of the cam. 36 so that the length of web fed through the printing ma- "chine shall be equal to or slightly less than the length of web fed between the rolls I92, the rolls I92 will procure the necessary movement of the web through the printing machine to compensate for the inaccuracy of the adjustment of the feed forthe printing machine.

From the foregoing, it will be apparent that the printing machine provides for printing spaced impressions on a continuous web with the spacing of the impressions independent of the circumference of the printing rolls and that the print ing machine is arranged to supply the web to another machine in conjunction with which the printing machine operates with the printed i'mpressions on said Web properly located relative to the operative mechanism of the auxiliary machine. The printing machine provides for printing a plurality of series of spaced impressions on the same continuous web with one series of impressions in proper spaced relation to those of the other series. In operating the printing machine in conjunction with an auxiliary machine; said machines are driven in timed relation in order that the spaced impressions shall be properly located relative to the operations performed on the web by the auxiliary machine with provision for taking up the slack and compensating for the different rates of travel of the web in the two machines so that the rates .of movement of the web through the printing machine may be dissimilar to the rates of movement of the web through the auxiliary machine.

I claim",

1. In a machine for printing spaced impressions on a continuous web by gravure printing, a gravure printing roll, a pressure roll 'to press the web against the printing roll, means for feeding a predetermined length of web between said rolls for each rotation of the print roll, said feeding means comprising a driving roll having the same surface speed as the printing roll, and a movable roll engaging said-driving roll and pressing the web against said driving roll duringa portion only of each rotation of said driving roll for advancing the web between the printing and pressure rolls -at the same speed as the rolls, and meansfor relative movement between said web and the surface of the printing roll.

2. In a machine for printing spaced impressions on a continuous web, a printing roll, a pres sure roll to press the web against the printing roll, means for feeding a predetermined length of web between said rolls for each rotation of the print roll, mechanism operative beyond the printing operation for positively moving the web ata constant speed, and means for maintaining said web under tension between said feeding means and said constant speed means, and for establishing a predetermined length of web between the feeding means and the positively moving means at the beginning of each feeding movement by said feeding means.

3. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll to press the web against the printing roll, means for feeding a predetermined length of web between said rolls for each rotation of the print roll, mechanism for procuring an operation on said web after the printing operation, said mechanism carrying the web from said printing roll at a predetermined rate, and means for maintaining said web under tension between said feeding means and said mechanism, and for establishing a predetermined length of web between said mechanism and the feeding means at the beginning of each feeding operation.

4. In a machine for printing spaced impressions on a continuous web, a plurality of spaced printing mechanisms, each mechanism comprising a printing roll, and a pressure roll for each printing roll for pressing the web into contact with the printing surface of said rolls, means for feeding a predetermined length of web between the printing rolls and pressure rolls for each rotation of said printing rolls, with the length of web independent of the circumference of the rolls, means for supporting said pressure rolls for movement of the surfaces thereof relative to the surfaces of the printing rolls, means for maintaining said web under tension and for taking up the slack between said printing rolls, and means to vary the spacing between said printing mechanisms in accordance with the spacing of the impressions on said'web.

5. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll for pressing the web against the printing roll, means for feeding a. predetermined length of web between said rolls for each rotation of the print roll, with the length of web independent of the circumference of the printing roll, means for procuring movement of said web at a constant speed after the printing operation, and means for maintaining said web under tension between said feeding means and the means for moving the web, and for establishing a predetermined length of web between said constant speed-moving means and said feeding means at the beginning of each printing operation.

6. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll for pressing the web against the printing surface of the printing roll, means for feeding a predetermined length of web between said rolls for each rotation of the printing roll and at the surface speed of the printing roll, means operable after the printing operation for procuring operations on predetermined lengths of said web in accordance with the spacing of the impressions thereon, including means for positively advancing said web at a predetermined rate,

means for actuating the feeding means in timed relation to the last-mentioned means, and means for establishing a predetermined distance between the positively-advancing means and the feeding means between successive printing operations while the feeding means are inoperative.

7. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll for pressing theweb against the printing surface of the printing roll, means providing for feeding a predetermined length of web between said rolls for each rotation of the printing roll and providing for movement of the web relative thereto between successive feeding operations, means operable after the printing operation for moving the web at a constant speed, means for actuating said moving means in unison with said feeding means, said feeding means procuring a faster movement of the web during the feeding operation than the constant speed movement of the web after the printing operation, and means for maintaining said web under tension and for taking up the slack between said feeding :means and said constant speed means.

8. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll for pressing the web against the printing surface of the printing roll, means providing for feeding a predetermined length of web between said rolls for each rotation of the printing roll and providing for movement of the web relative thereto between successive feeding operations, said means comprising a feed roll moving at a constant speed and a movable roll engaging said driven roll during a. portion only of each rotation of said driving roll, constant speed means operable beyond the printing operation for moving the web at a constant speed, means for maintaining said web under tension between said feeding means and said moving means, and means for establishing a predetermined length of web'between said constant speed means and said feeding means at the initiation of each feeding movement.

9. In a machine for printing spaced impressions on a continuous web, a plurality of spaced printing rolls, a pressure roll for each printing roll for pressing the web into contact with the printing surfaces of said rolls, means for feeding a predetermined length of web between the printing rolls and the pressure rolls for each rotation of said printing rolls, the length of web being independent of the length of the circumference of said rolls, means for moving said printing rolls toward or away from each other to provide for different spacing between successive impressions on said web, and means for actuating said printing rolls in unison with the surfaces of said rolls moving at the same rate of speed.

10. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll to press the web against the printing roll, means for feeding a predetermined length of web between said rolls for each rotation of the print roll, said feeding means comprising a driving roll and means engaging said driving roll and pressing the web against said roll during a portion only of each rotation of said driving roll, means operable after the printing operation for moving said web, said moving means and said driving roll being actuated in unison, and means for maintaining said web under tension between said feeding means and said moving means and for establishing a predetermined length ofweb between said moving means and print roll, said feeding means comprising a driving roll and means engaging said driving roll and pressing the web against said roll during a portion only of each rotation of said driving roll,

means operable after the printing operation for intermittently actuating said Web in accordance with the spacing of the impressions on said web, and means for maintaining said web under tension between said feeding means and said moving means and for establishing a predetermined length of web between said feeding means and said moving means between successive feeding operations.

12. The combination with means for operating on predetermined lengths of a continuous web, of before said first means becomes operative in accordance with the lengths of web to be operated on, said printing means comprising a printing roll, a pressure roll for pressing the web against the printing roll, means for feeding a predetermined length of Web corresponding to the spacing of the impressions between said rolls for each rotation of the printing roll, means for spacing the surface of the pressure roll from the printing roll between successive impressions on said web, means for maintaining said web under tension between said feeding means and said first-mentioned nieans, and means for operating said feeding means in timed relation to said first-mentioned means, whereby each impression on the web is in predetermined relationto the length of web operated upon by said first-mentioned means.

13. The combination with a mechanism for operating upon a continuous web, said mechanism having a master roller over which said web is carried at a constant speed, of a printing mechanism for printing spaced impressions on said web before it reaches said master roller, said printing mechanism comprising a printingroll, a pressure roll,.means for separating said printing roll and said pressure roll between successive impressions .on said web, means for feeding said web between said rolls, comprising a feed roll and a movable roll pressing said web against the feed roll during a portion only of each rotation of the feed roll, and means to maintain the web under tension between said printing mechanism and the master roller.

14. The combination with a mechanism for operating upon a continuous web, said mechanism having an intermittently actuated master roller over which said web is carried, of a printing mechanism for printing spaced impressions on said web before it reaches said master roller, said printing mechanism comprising a printing roll, a pressure roll, means for separating said printing roll and said pressure roll between successive impressions on said web, means for feeding said web between said rolls, comprisingfa feed roll and a movable roll pressing said web' against the feed roll during a. portion only of each rotation of the feed roll, and means to maintain the web under tension between said printing device and the master roller.

15. The combination with a mechanism for operating upon a continuous web, said mechanism having a master roller over which said web-is means for printing impressions on said web 2,029,996 said feeding means between successive feeding opcarried at a constant speed, of a printing mechanism for printing spaced impressions on said web before it reaches said master roller, said printing mechanism. comprising a printing roll,

a pressure roll, means for separating said printing roll and'said pressure roll between successive impressions on said web, means for feeding said web between said rolls, comprising a feed roll and a movable roll pressing said web against the feed roll during a portion only of each rotation of the feed roll, and means to maintain the web under tension between said printing device and the master roller and to establish a predetermined length of web between the feed roll and the master roller at the beginning of each feeding movement of the web by said feed roll and movable roll.

16. The combination with a mechanism for operating upon a continuous web, said mechanism having an intermittently actuated master roller over which said web is carried, of a printing mechanism for printing spaced impressions on said web before it reaches said master roller, said printing mechanism comprising a printing roll, a pressure roll, nieans for separating said printing roll and said pressure roll betweensuccessive impressions on said web, means for feeding said web between said rolls, comprising a feed roll and a movable roll pressing said web against the feed roll during a portion only of each rotation of the feed roll, and means to maintain the web under tension between said printing device and the master roller, and to establish a predetermined length of web between the feed roll and the master roll at the beginning of the feeding movement of the web by said feed roll.

17. The combination with a mechanism for operating upon a continuous web, said mechanism having an intermittently actuated master roller over which said web is carried, of a printing mechweb between said rolls, comprising a feed roll and a movable roll pressing said web against the feed rollduring a portion only of each rotation of the feed roll, means to deliver the web from the printing machine at a substantially constant speed, and means to establish a predetermined impressions on said web, means for feeding said I length of web between the feed roll and the master roll at the beginning of the feeding movement of the web by said feed roll.

0?) In a machine for printing spaced impressi s on a continuous web, a print roll, a pressure roll to press the web into contact with the printing surface of the print roll, means for feeding a predetermined length of web between said rolls for each rotation of said print roll, means for separating said pressure roll and said print roll between successive impressions on said web, and means involving a single adjustment for varyin the spacing of the impressions on the web. 19. In a machine for printing spaced impressions on a continuous web, a print roll, a pressure roll to press the web into contact with the printing surface of the print roll, means for feeding a predetermined length of web between said rolls for each rotation of said print roll, and means for spacing said pressure roll from said print roll between successive impressions on said web, and means involving a single adjustment for varying the spacing of the impressions on said web by varying the length of web fed by said feeding means.

20. In a machine for printing spaced impressions on a continuous web, a plurality of spaced printing rolls, a pressure roll for each printing roll for pressing the web into contact with the printing surface of said rolls, means for feeding a predetermined length of web between the printing rolls and pressure rolls for each rotation thereof, with the length of web independent of the circumference of the rolls, means for supporting said pressure rolls for movement of the surfaces thereof relative to the surfaces of the printing rolls, means for moving said web at a predetermined rate after it passes between said rolls, means for maintaining said web under tension between said feeding means and said moving means, and means involving a single adjustment for varying the spacing of the impressions on said web.

21. The combination with a mechanism for operating upon a continuous web, saidmechanism having a master roller over which said web is carried at a predetermined rate, of a printing mechanism for printing spaced impressions on said web before it reaches said master roller, said printing mechanism comprising a printing roll and a pressure roll; and means for feeding said web between said rolls, comprising a feed roll and a movable roll pressing said web against the feed roll during a portion only of each rotation of said roll, and means to maintain the web under tension between said printing mechanism and the master roller, and to establish a predetermined length of web between the feed roll and the master roller at the beginning of each feeding movement of the web by said feed roll.

22. In a machine for printing spaced impressions on a continuous web, the combination with a gravure printing roll, and a pressure roll for pressing the web against the printing roll, of means for feeding a predetermined length of web between said rolls for each rotation of the printing roll and at the surface speed of the printing roll, and means for spacing the surface of the pressure roll from the printing roll between successive printing operations while the feeding means is inoperative.

23. In a machine for printing spaced impressions on a continuous web, a printing roll, a pressure roll for pressing the web against the printing surface of the printing roll, means for feeding a predetermined length of web between said rolls for each rotation of the printing roll, means operable on said web after the printing operation for positively advancing the web at a predetermined rate, means for establishing a predetermined length of web between the web-advancing means and the feeding means between successive printing operations, and means providing for movement of said web relative to the feeding means while said length-establishing means is operative.

24. In a machine for printing spaced impressions on a continuous web, a printing mechanism, means for feeding a predetermined length of web through said printing mechanism for each printing operation, means operable on said web after the printing operation for positively advancing the web at a predetermined rate, means for establishing a predetermined length of web between the web-advancing means and the feeding means between successive printing operations, andmeans to provide for free movement of the web through the printing mechanism and feeding means during the operation of said length-establishing means.

25. In a. machine for printing spaced impressions on a continuous web, a printing mechanism, and means for feeding a predetermined length of web through said printing mechanism for each printing operation, said means comprising a feeding roll rotatable at the surface speed of the printing roll of the printing mechanism,

and a movable roll engageable with the feeding roll during a predetermined portion of each rotation of said feeding roll, said feeding roll having a notch therein, the lagging edge of said notch being engageable with the movable roll when the latter is moved into engagement with the feeding roll to provide for a positive advance of the web positioned between said rolls.

SAMUEL FURMAN.

Images