US2090847A - Margin control for duplicating machines - Google Patents

Description

Aug. 24, w37. A. MARCHE-:V 2,090,847?

MARGIN CONTROL FOR DUPLICATING MACHINES Filed March 6, 1936 6 Sheets-Sheet l MARGIN CONTROL FoR DUPLICATING MACHINES Filed March 6,l 1936 6 Sheets-Sheet 2 Aug. 24, 1937. A. MARcHEv MARGIN CONTROL FOR DUPLICATING MACHINESl Filed March 6, 1956 6 Sheets-Sheet 3 Aug, 24, 1937. A. MARCHEV' 2,090,847

A MARGIN CONTROL FOR DUPLICATING MACHIES Filed March 6, 1936 6 Sheets-Sheet 4 fff\V Fgg; A 715 ug. 24, 1937. A, MARCHEV MARGIN CONTROL FOR DUPLIOATINC- MACHINES Filed March 6, 1936 6 SheecS-Sheei'I 5 ffy ff Aug 24, 1937. A. MARcHEv MARGIN CONTROL FOR DUPLICATING MACHINES `Filed March 6, 1956 6 Sheets-Sheet 6 Patented Aug. 24, 1937.'

UNITED STATES PATENT OFFICE MARGIN CONTROL FOR DUPLICATING MACHINES of West Virginia Application March 6,

11 Claims.

This invention relates to duplicating machines of the general type shown in the application of John W. Hernlund, Serial Number 44,911, 'led October 14, 1935 for Duplicating machines.

Machines of this type employ master sheets which are mounted upon a drum and copy sheets are moistened with a suitable solvent for the ink or carbon on the master sheet immediately before they are brought into contact with the side koi the master sheet upon Whichthe ink or carbon is placed.

The master sheets have the data to be duplicated formed thereon in reverse so that when a portion of the ink is dissolved o and transferred to the moistened surface of the copy sheet,

it will appear in correct readable form. In practice, some readily volatile solvent such as alcohol is employed.

The present invention is embodied in a ma- D chine of the type described above which machine may desirably constitute a pair of feed rollers.

One of the feed rollers may cooperate with a moistening device so that this `feed roller will supply the volatile solvent to one surface of a copy sheet as itis fed to the drum. A platen roller is employed to press the copy sheets against a master sheet secured on the drum.

I n machines of this character, it is necessary to change the master sheets and the improved machine embodying the present invention comprises mechanism whereby a master sheet clamped to the drum may be rapidly removed and a new master sheet may be substituted in its place. k

In using a machine of this character, it is desirable oftentimes to vary the margin left at the front or head end'of the copy sheet. In the aforementioned' application means are provided whereby in the original setting of the drum with respect to .the feed rollers, a denite margin ad- 4-5 justment may be "made, This adjustment however, is not adequate to take care of situations wherein certain copies may need to have a wider or narrower margin than other copies may from the same master.

The improved machine embodying the present invention comprises mechanism whereby the margin for any copy sheet may be quickly adjusted within a substantial range by the operator.

Other features and advantages of the invention will become apparent as the following description 1936, Serial No. 67,468

progresses reference beingvhad to the accompanying drawings wherein- Fig. 1 is a plan view of a duplicating machine which embodies the invention;

Fig. 2 is a vertical sectional view taken on the line 2 2 of Fig. 1;

Fig. 3 is an enlarged fragmentary sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a fragmentary sectional view taken on the line iof Fig. 3;

Figs. 5 and 6 are fragmentary sectional views through a portion of the drum and the feeding and platen rollers illustrating the range of margin adjustment provided;

Fig. 'l is a sectional view similar to Fig. 3 illustrating a modified form of the invention;

Fig. 8 is a fragmentary plan view of the form of the invention shown in Fig. '7

Fig. 9 is a sectional view taken on the line 9--9 of Fig. 7;

Fig. 10 is a sectional view similar to Fig. 3 illustrating a further modification of the invention; Fig. 11 is a sectional view taken substantially on the line iI-II of Fig. 10;

Fig. 12 is a sectional view taken on the line I2-I2 of Fig. 10;

Fig."13 is a sectional view taken on the line I3-I3 of Fig. 12;` f

Fig. 14 is a fragmentary sectional view taken on the line 2--2 of Fig. 1 and showing the mecha- `nism in a changed position from that shown in Fig. 2; and

Fig. 15 is a fragmentary side elevation with certain parts broken away to illustrate the drive connection whereby the duplicating. machine is operated from a rotatable hand lever.

Referring now to the drawings in which a preferred embodiment of the invention is shown, the reference characters I6 and Il designate a pair of side frames adapted to rest upon any suitable support. The side frames I6 and Il are secured together by any suitable means suchas that shown in the aforementioned application. A drum IB is rotatably journalled in the side frames I 6 and I1 by a suitable shaft I9. l

As best shown in Fig. 15, thedrum I8 is adapted to be rotated by means of a hand lever 20. The hand lever 20 is keyed to a stub shaft 2l rotatably mounted in the side frame I1. The stub shaft 2I also carries a pinion 22 which meshes with a gear 23 that is keyed to the shaft I9 by key 24. The pinion 22 and the gear 23 are enclosed by a housing 25 which is secured on the outside of the vside frame I'I by means of a pair of screws 26 and The drum I8 has a large gear 26 secured to the f end thereof adjacent to the side frame I1 and this gear 28 meshes with an intermediate gear 29 that in turn drives a suitable gear not shown for rotating a combined feeding and moistening roller 3 6. A feit covered roller 3i cooperates with the roller 30 to advance copy sheets to the drum I8 and a platen roller 32 is adapted to press copy sheets against a master sheet on the drum I8. A moistening receptacle 33 is supported in front of the moistening roller 36 and is adapted to supply a solvent liquid to the surface of the roller 36 through a felt wick 34.. A copy sheet table 35 is supported on the side frames I6 and I1 and projects beneath the moistening receptacle 33 terminating adjacent to the junction or meeting lines of the rollers 36 and 3i.

As described more fully in the aforementioned application, the drum I8 is provided with a plurality of grippers 36 which are adapted to project through suitable openings 31 provided in the surface of the drum I Brand clamp one edge of a master sheet 3B in a groove 39 which runs longitudinally of the drum I6. 'I'he grippers 36 are mounted upon a gripper shaft 46 which is :lournalled in the ends of the drum I8.

The shaft 40 has a lever arm 4I fixed thereto. l

45 mounted thereon in diametrically opposite positions with respect to the shaft I6.

On the adjacent side frame I1, a pair of cam levers 46 and 41 are secured. These cam levers arerotatably mounted upon a pair of stub shafts 48 and 49 and are urged toward the rollers 44 and 45 respectively by `a pair of coiled springs 56 and 5I wound around the hubs of the cam levers 46 and 41 and secured at one end to the cam levers and at the other end to the side frames I1 so as to yieldingly press the cam levers toward their respective rollers 44 and 45. The lever arm v4I has a roller 52 thereon which roller is adapted to ride upon the outer surfaces of the cam levers 46 and 41 as the drum -is rotated.

Referring now to Fig. 14 in connection with Fig. 2, it will be noted that the position of the hand lever 43 has been changed in Fig. 14 so as to move the rollers 44 and 45 outwardly along the cam levers 46 and 41 so as to separate the cam levers. The roller 45, however, drops into` a recess 53 in the cam lever 41 and the roller 44 rides upon a portion 54 of the Icam lever 46 that does not effect any substantial outward movement of the cam lever 46. The roller 52 on the le'vercarm 4I therefore, does not contact either of the cam levers 46 or 41 when the hand lever is in the position. shown in Fig. 14 and so the grippers 36 remain closed.

Now, however, if the hand lever 43 is moved further in a counterclockwise direction from the position shown in Fig. 14, its rollers 44 and 45 push the cam levers 46 and 41 outwardly so that either one of them will engage the roller 52 on the A. lever arm 4I and cause the grippers, 36 to be I'he hand lever 43 also controls through a suitable mechanism which will now be described the stopping oi' the drum in position to receive a fresh master sheet. A master sheet tray 55 is pivotally supported between the side frames I6 and l1 by means of a pair of pins 56 and 51. A spring 5I secured at one end to a pin 59 onthe master sheet tray 55 and at the other end to a pin 66 on the side frame I1 yieldingly presses the master sheet tray 55 toward the surface of the drum I6. The master sheet tray has a stop projection 6I thereon which projection normally engages a pin 62 to prevent the master sheet tray from being lowered into the drum surface..

The pin 62 is secured to' a block 63. 'Ihe block 63 is pivoted on a stub shaft 64 mounted in the side frame I1 and carries an adjustable stop member 65 which is adapted to engage a tie rod 66 and limit the movement of the block 63 in clockwise direction about the shaft 64. A spring 61 secured at one end to a pin 68 on the side frame I1 and at the other end to a pin 69 on` the block 63 is adapted to urge the block 63 into its limiting position shown in Fig. 14 where the stop member 65 engages the tie rod 66.

Integral with the block 63, there is an arm 16 which arm is connected by a link 1I to a projection 12 on the hub of the hand lever 43. Thus, when the hand lever 43 is moved to the position shown in Fig. 2, the link 1I pulls the arm 16 in a counterclockwise direction to hold the block 63 in the position shown in Fig. 2. In this position of the block 63, the pin 62 engages the portion 6I of the master sheet tray 55 and holds the master sheet tray away from the drum surface.

It will be noted that the link"1i is slotted as indicated at 13. When the hand lever 43 is moved to the position shown in Fig. 14, the link 1I is moved to permit clockwise movement of the arm 10 and the block 63 by virtue of reflex action of spring 61. This clockwise movement is stopped when the stop member 65 engages the tie rod 66. The slots 13 in the link 1I however, permits furtherimovement of this link and therefore further movement of the hand lever 43 to open the grippers 36.

The block 63 also has integral therewith a stopl arm 14., This stop arm is positioned by the movement of the arm 10 and block 63 just described in the path of a stop pin 15 that is mounted on a cam member 16 fixed to the end of the drum I6. Thus, a positive stopls provided for the drum when the hand lever 43 is moved into the position shown in Fig. 14. i

To prevent reverse movement of the drum and to latch it in aldeflnite position, there is a. latch lever 11 pivoted on the stub shaft 64 and yieldingly held against the pin 62 by a spring 13. The latch lever 11 as illustrated in Fig. 14 is adapted to drop behind the stop pin 15 where it extends f on the opposite side of the cam member 16 from the portion of the stop pin 15 engaged by the arm 14.

The manner in which the drum I3 is stopped after each printing operation in position to have a new copy sheet applied to a master-sheet thereon will now be described.

Referring now particularly to Fig. 3 in connection with Fig. 1, it'wili be noted that at the end of the drum adjacent the side frame I6, a cam plate 66 is fixed to the drum by means of suitable studs 8| and 62. 'I'he plate 86 is apertured for the shaft I9. This cam plate in rotating with the drum is adapted to engage a roller 63 which is mounted on the end of an 64.

The roller 83 rides up upon an advancing surface 85 on the cam plate 88 and drops into a recess 86 in the cam plate to effect stopping of the drum in the desired position to receive a new copy sheet.

Referring now to Figs. 5 and 6, if it is desired to have a. copy lsheet registered accurately with the forward edge of a master sheet then the stop position of the drum must be such that the dis- '10 tance from the forward edge of the master sheet along the drum surface to the point which the platen roller 32 engages the drum must be substantially equal to the distance which the rollers 38 and 3| will advance a copy sheet 81 while the drum is moving to bring the front edge of the master sheet to the platen roller. The speed of rotation of the roller 38 is preferably so made as described in the aforesaid application as to cause the advance of a copy sheet at a rate almost the same as the surface speed of the drum. Preferably, the rollers 38 and 3| advance a copy sheet a little slower than the surface speedof the drum.

Now, however, in the event that a greater or less margin is wanted on the copy sheet than is present on the master sheet attached to the drum, there must be some change in the relative position of the master sheet grippers and the platen roller 32 at the time the drum stops with the cam plate 88 and the roller 88 for stopping rotation of the drum in copy sheet feeding position. This adjustment of margins on copy sheets is accomplished by mounting the arm 88 which carries the roller 83 so that it can be moved circumferentially of the drum. 85 p In order to accomplish this result, a hand lever 88 is pivoted to the side frame I6 by means of a pin 89. The arm 88 is then pivoted to the hand lever 88 by means of a pin 98. The arm 88 has a portion 9| which extends over behind the hand lever 88 as shown most clearly in Fig. 1. Also a spring 92 is coiled around the pin 98 and hooked over the arm 84 at one end and the hand lever 88 at its other end so as to press the roller 88 against the cam plate 88. The portion 9| of the arrn 84 acts as a stop to limit the counterclockwise movement of the cam 84 by engaging with the hand lever 88.

The hand lever 88 projects up above the side frame I6 and is provided with a bracket 93 in which a pin 94 is mounted. The side frame I6 has a top flange 95 which is provided with a plurality of apertures 98 adapted to receive a reduced end portion 91 of the pin 94. A spring 98 is mounted on the pin 98 within the bracket 93 and engages a. flange 99 on the pin 98 so as to yieldingly press it toward the flange85 of the side frame I8. The apertures 96 thus cooperate with the pin 98 to lock the hand lever 88 in any one of the several positions indicated by the apertures 96.

By moving the hand lever 88 from one position to another, the stop position of the drum I8 may be shifted over a substantial range. Some evidence of the range is indicated by observing the position of the grippers in Fig. 5 and comparing this with the position of the grippers in Fig. 6.

Thus in Fig. 5, the copy sheet 8l if started into rollers 38 and 3| at the time the rollers started rotating, would reach the junction of the drum I8 and the platen roller 32 considerably in advance of the master sheet 38. This would provide a greater margin on the copy sheet 81 than that provided on the master sheet 38.

In Fig. 6, the result of advancing the stop position of the drum is shown. If the drum were started to rotate with a 'copy sheet in position and the parts in the positions shown in Fig. 6 then the forward edge of the master sheet would pass the platen roller 32 before the copy sheet reached the junction of the drum I8 and the platen roller 32. In this case the copy sheet margin would be considerably less than that provided on the master sheet.

Referring now to Figs. 'I to 9 inclusive, these iig- 4 frame I 6 by means of a pair of guides |82 and |83 fixed to a thickened portion |84 on the side frame I6 by suitable screws. The block I8| is grooved and the guides |82 and |88 have tongues fitting in the grooves of the block I8I. A spring |85 is wound around the pin |88 and has one end hooked over the arm 84 while its` other end is hooked over a pin |88 also mounted on the block I8I. To limit the distance to which the spring |85 can turn the arm 88, the arm 84 is provided with a stop projection |811 which is adapted to engage the pin |86. The block I8I carries a pointer |88 which is secured to the block by a screw |88 and which fits over the'pin |88. This pointer |88 projects over the top flange of the side frame I6 and has a pointed end II8 adapted to cooperate with suitable graduations shown at III in Fig. 8.-

For moving the block 98| so as' to shift the position of the arm 84, this block is screw threaded to receive a screw threaded adjusting rod I I2.

This rod is rotatably secured in a lug I I3 formed be understood, of course, that by rotation of the rod II2, the block I8I may be moved lengthwise in its guide I82'and |83 tov thereby change the stop position of the drum. This method of adjustment enables the setting of the margin with a high degree of accuracy,

Referring now to Figs. 10 to 13 inclusive, a further modification is shown of the means for stopping the drum in position to receive a new copy sheet. In this form of the invention, the cam plate 88 remains the same and its cam surfaces 85 and 86 are not changed.

'Ihe side frame I8 has a boss I I1 thereon which has a pivot pin II8 screw threaded into it. The pivot pin supports a lever II9 which lever projects up along the side frame I8 and fits in a recess |28 provided in the top iiange of the side frame I6. The top flange is made thicker adjacent the recess |28 and has mounted therein a pair of spaced spring pressed detents I2I and |22. The lever II9 isadapted to be moved by hand over these detents so that it may be held in place in three positions: one positionwhere it is shown in Fig. 10, a second position where it is between the two detents I2I and |22, and a third position where it is between the detent I2I and the adjacent end of the recess |28.

The lever IIS carries a. roller |23 to engage the cam surfaces 88 and 86. The lever ||9 has a 75 the blocki|30 is guided in the slots |21 and |26.

These blocks are pressed downwardly by a pair of springs |3| and |32 against a shaft |33 that extends lengthwise through the U-shaped bracket |24, 'I'his shaft has a head |34 at one end and a pin |35rat the other end to prevent its moving endwise in the bracket.

The downward movement of the shaft |33 is limited by a pair of pins |36 and |31. The roller |23 is carried by the shaft |33. It will be evident from the above description that the roller |23 can move up and down so as to ride over the cam surfaces 85 and 86. It will also be obvious that the springs |3| and |32 will yieldingly press the roller against the cam surfaces. Y

While certain embodiments of the invention have been shown and described, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims in which it is the intention to claim all novelty inherent in the invention as broadly as possible in view of the prior art. l

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp a master sheet thereto, feeding rollers adjacent to said'drum, means interconnecting said drum and said rollers wherebyto cause rotationof the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a rollercarried by said framework and adapted to engage said cam to stop the drum, and manually operable means for shifting said roller on the frame to vary the stop position of the drum.

2. In a duplicating machine of the'character described,` a framework, a drum rotatably journalled therein and having means thereon' to clampa' master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said ca'm to stop the drum, and manually operable means for shifting said roller on the frame to vary the stop position of the drum, said manually operable means comprising a spring pressed arm on which said cam roller is mounted, and a lever pivoted on the framework and carrying said arm, said lever being pivoted on an axis parallel to the drum axis and being movable to shift said cam roller in the direction of movement of the periphery of said drum.

3. In a` duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp a master sheet thereto, feeding rollers adjacent to laid drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said cam to stop the drum, and manually operable means for shifting said roller on the frame to vary the stop position o f the drum, said manually operable means comprising a spring pressed arm on which said cam roller is mounted, and a lever pivoted on the framework and carrying said arm, said lever being pivoted on an axis parallel to the drum axis and being' movable to shift said cam roller in the direction of movement of the periphery of said drum, said lever and said framework having cooperating portions for holding the lever in any one of a plurality of positions.

4. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp a master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said cam to stop the drum, and manually operable means forrshifting said roller on the frame to vary the stop position of the drum, said manually operable means comprising a spring pressed arm carrying said cam roller, a block movably mounted on the framework and supporting said arm, and means for shifting said block on the framework in the direction of movement of the periphery of said drum.

5. In a duplicatingmachine of the characterdescribed, a framework, a drum rotatably journalledtherein and having means thereon to clampv a master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprisinga cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted toiengage said cam to stop the drum, and manually operable meansv pivoted on the framework and carrying said arm, f said lever being pivoted on an axis parallel to the drum axis and being movable to shift said cam roller in the direction of movement of the periphery of said drum, a spring pressed pin on said lever, and said framework having spaced sockets for said pin whereby to position said lever in any one of several positions.

6. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp a master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said cam to stop the drum, and manually operable means for shifting said roller on the framel to vary Ans the stop position of the drum, said manually operable means comprising a lever on said framework and carrying said roller, and spring means thereon for pressing the roller toward the cam.

'7. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp a master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, an adjustable stop means for said drum, said stop means comprising a cam xed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said cam to stop the drum, and manually operable means for shifting said roller on the frame to vary the` stop position of the drum, said manually operable means comprising a lever on said framework and carrying said roller, and spring means thereon for pressing the roller toward the cam, and means on the framework for releasably holding said lever in either one of a plurality of positions.

8. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp a master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is rotated, and adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said cam to stop the drum, and manually operable means for shifting said roller on the frame to vary the stop position of the drum, said manually operable means comprising a lever on said framework and carrying said roller, and spring means thereon for pressing the roller toward the cam, and means on the framework for releasably holding said lever in either one of a plurality of positions, said last named means comprising spring pressed detents on the framework in the path of the lever.

9. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein and having means thereon to clamp 'a master sheet thereto, feeding rollers adjacent to said drum, means interconnecting said drum and said rollers whereby to cause rotation of the rollers when the drum is4 rotated, an adjustable stop means for said drum, said stop means comprising a cam fixed to said drum and having a stop recess therein, a roller carried by said framework and adapted to engage said cam to stop the drum, and manually operable means for shifting said roller on the frame to vary the stop position of the drum, said manually operable means comprising a spring pressed arm carrying said cam roller, a block movably mounted on the framework and supporting said arm, a screw rotatable in said block, and a member xed on the framework in which screw is threaded.

10. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein, and adjustable stop means for said drum, said stop means comprising a member rotatable with the drum and having a stop thereon, a second member carried by the framework and movable into the path of said stop to limit advance movement of thedrum, and manually operable means for shifting said second member on the frame to vary the stop position of said drum, said manually operable means comprising a support for said second member movably mounted on the framework and a screw for shifting said support on the framework.

ll. In a duplicating machine of the character described, a framework, a drum rotatably journalled therein, and adjustable stop means for said drum, said stop means comprising a member rotatable with the drum -and having a stop thereon, a second member carried by the framework and movable into the path of said stop to limit advance movement of the drum, and manually operable means for shifting said second member on the frame to vary the stop position o1' said drum, said manually operable means comprising a spring pressed arm on which said second member is mounted, a support for said arm movably mounted on said framework and means on the framework for releasably holding said support in any one of a plurality of positions.

ALFRED MARCHEV.

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