US2912927A - Duplicating machine for selective printing - Google Patents

Description

Nov. 17, 1959 w. RITZERFELD EI'AL 2,912,927

DUPLICATING MACHINE FOR SELECTIVE PRINTING Filed April 1a, 1958 2 Sheets-Sheet l DUPLICATING MACHINE FOR SELECTIVE PRINTING Filed April 16. 1958 W. RITZERFELD EI'AL Nov. 17, 1959 2 Sheets-Sheet g haw United States Patt DUPLICATING MACHINE FOR SELECTIVE PRINTING Wilhelm Ritzerfeld, Berlin-Dahlem, and Gerhard Ritzerfeld, BerIin-Grunewald, Germany The present invention is a continuation-in-part application of our co-pending application Serial No. 620,- 546, filed on November 5, 1956, now US. Patent No. 2,860,574.

The present invention relates to a duplicating machine for selective printing of desired sections or lines of a printing form, and relates more particularly to a duplicating machine of the type in which selected printing sec: tions of a printing form are printed in adjacent positions on a copy sheet, although the printing sections may be spaced from each other on the printing form.

Duplicating machines of this type are known, in which an electromagnetic means urges a pressure roller against a printing roller which carries the printing form.

It is one object of the present invention to overcome certain disadvantages of duplicating machines of this type, and to provide a duplicating machine which permits selective printing of sections of a printing form under.

control of manually operated selector members.

Another object of the present invention is to provide a duplicating machine of this type which is of very simple construction and can be inexpensively manufactured.

Another object of the present invention is to provide a duplicating machine of this type in which during each revolution of the printing roller, a selected first printing section is reproduced, whereas during each successive revolution of the printing roller successive different sections of the printing form are reproduced on the copy sheet adjacent the continuously repeated first printing section. 1

Another object of the present invention is to provide a duplicating machine having shiftable selector means by which the machine can be set to repeated printing of selected sections of the printing form, or to automatic printing of different successive sections of the printing form.

Another object of the present invention is to provide the manually operated portions of the selector members on the side of the machine from which the copy sheets are fed to the printing roller.

, With these objects in view, the present invention mainly consists in a selector mechanism for use with a duplicating machine which comprises a rotary printing roller, a printing form secured to the printing roller and having a plurality of printing sections, a rotary pressure roller cooperating with the printing roller, and operating means for moving the pressure roller to and from a printing position in close proximity to the printing roller. Copy sheets fed into the printing line between the two rollers, are transported by the turning rollers in the printing position of the rollers, but when the pressure roller is spaced from the printing roller, a holding means holds the copy sheet stationary, so that when the pressure roller is again moved to printing position, a spaced printing section of the printing form is printed on the copy sheet adjacent the first printed printing section.

In the duplicating machine according to the present 2 invention, the operating means include electromagnetic means which actuate the pressure roller to move to printing position when the electromagnetic means is energized.

The selector mechanism according to the present invention includes at least one rotary carrier; switch means mounted on the carrier and'having an engaging portion moving along a circular path during rotation of the carrier, 21 set of manually operable selector members arranged in a circle and being independently movable in axial direction of the carrier between an inoperative position, and an operative position projecting into the path of movement of the engaging portion of the switch means; and means connecting the carrier with the printing roller for rotation in timed relation so that each printing section of the printing form is located opposite the pressure roller when the associated selector member in operative position engages and actuates the switch means.

The switch means is electrically connected to the electromagentic means, and energizes the same'when actuated by a selector member during turning movement of the carrier. Since at the moment: in which any selector member closes the switch means and energizes the electromagnetic means, the respective printing section associated with the actuated selector member is located opposite the pressure roller, this selected printing section is printed when the electromagnetic means moves the pressure roller to printing position.

An important feature of the present invention is the mounting of the selector members for movement in axial direction of the rotary carrier whereby a radial movement of the actuated switch means is obtained.

In the preferred embodiment of the present invention a second rotary carrier is provided, which can be connected to the first carrier in a plurality of angularly displaced positions respectively associated with the printing sections; Thesecond carrier also carries a switch means, so that the relative position between the two switch means on the two carriers can be varied as desired- Since eachselector member is movable to a position engaging both switch means, two different printing sections can be reproduced-on the copy sheet under control of a single selector member.

Preferably,.each selector member-"is shiftable between a position engaging only one switch, another position engaging both switches, and a third position engaging only the other switch. V

In the preferred er n-boclimentv of the present invention, thetwo carriers are interconnected by a spring loaded stepping mechanism, which is automatically operated during eachrevolution of the carrier The stepping mechanism etfects step-wise turning of one carrier relative to the other carrierwhen actuated. Consequently it is possible to reproduce the same printing section during each revolution of the carriers under the control of the switch means on the carrier which is driven, whereas difierent successive printing sections are reproduced 'on the copy sheet under the control of the switch means on the other carrier, such other carrier being step-wise turned at the end of each revolution.

The novel features which are consideredas characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments When-read in connection with the accompanying drawings, in which: I Figure 1 is a side View of .an embodiment of the present invention, partly shown .in'section, and one of the side walls of the machine being omitted for the sake of clarity; Y

Figure 2 is a fragmentary sectional view on an enlarged scale and taken on line 2-2 in Figure 1; and

Figure 3 is a schematic view including a diagram showing the electric circuit of the apparatus.

Referring now to the drawing, and more particularly to Figure 1, a printing roller 1 is turnably' mounted on a shaft 3, and is driven from a motor, not shown, through a chain 6 passing over a chain wheel 4 which is secured to'printing roller 1 for rotation therewith. In a recess 81 .of. the printing roller 1, clamping means, not shown,- are mounted for clamping a printing form to the peripheral surface of the printing roller 1. The printing form is'a duplicating master sheet which has a plurality of printing sections Z1 to Z10. For example, printing section Z1 may be the heading of a printed text, and the other printing sections may contain lines of text.

A pressure roller 10 is mounted on a pair of pivoted supporting arms 82 for movement toward'and away from the printing roller, and is controlled by operating means which include a toggle'lev'er means 16, 17 which in the illustrated position hold the pressure roller 10 spaced from the printing roller, but are movable to a straightened position in which the pressure roller is in a printing position in close proximity to the printing roller and engaging the same, or the master sheet thereon along a printing line which is located in a plane passing through the axes of the rollers 1 and 10 as indicated in dash and dot lines in Fig. 1.

. Transporting rollers 22 and 23 feed the'copy sheet 21 from a table toward the holding means 72. A moistening device 83 is provided for moistening the copy sheet 21, as is required for 'hectographic duplicating. When a copy sheet reaches the printing line, it does not move because it is held by the holding means 72. When the pressure roller 10 is moved to its printing position, the copy sheet is engaged by the rollers 1 and 10 and transported. When the pressure roller 10 is again retracted the copy sheet stops due to the action of the holding means 72, while the printing roller continues its turning movement so that difierent printing sections Z1 to Z10 move to a position located opposite the -pressure roller 10. When the pressure roller 10 is moved to printing position, the respective printing section is printed on the copy sheet, and since the copy sheet remains stationary during the turning of the printing roller 1, the next selected printing section is printed adjacent to the first printed printing section on the copy sheet when the pressure roller is again moved to printmg position.

.Thevoperating toggle levers 16 and 17 are actuated by a rod 49 which is connected to the core of an electromagnetic means 28. When electromagnetic means 28 s energized, the pressure roller 10 moves to its printmg position.

- The circuit of the electromagnetic'means 28 is shown t in Figure 3 from which it is apparent that a source of alternating current supplies a transformer 72 whereupon the alternating current is rectified by a rectifier 73. If an electric connection is made between the rectifier and the electromagnetic means 28, the electromagnetic means will be energized, and the pressure roller will be moved to its printing position.

The energizing of the electromagnetic means is controlled by a selector device which is driven in timed relation with the printing roller 1. A bevel gear 61 is fixedly mounted on the printing roller 1, and drives through a meshing bevel gear 60 a shaft 59 which is mounted in bearings 59a. A first rotary carrier 57 includes a hub portion provided with two slip rings 65 and 66, anda flange portion 57a whose shape is best seen in 'Figure 2. The carrier 57 is fixedly connected to shaft 59, and performs the same number of revolutions as the printing roller 1. Carrier 57 carries a first switch means 55 which has a resilient engaging portion 55a.

' A second carrier 58 is mounted on shaft 59 -f01' m.-

ing movement relative to the first carrier 57, but is normally coupled to carrier 57 by a spring loaded stepping mechanism which includes a ratchet wheel 64, a stepping pawl 62 urged by a spring 71 into engagement with the coupling wheel 64, and controlled by a spring loaded pawl 63, and a spiral spring connected to carrier 58 and to shaft 59, and urging carrier 58 to turn relative to carrier 57. Such turning, however, is normally prevented due to the engagement between. pawl 62 which is mounted on carrier 57, and coupling wheel 64 which is mounted on carrier 58. A knob 58a is secured to carrier 58 and permits turning of the carrier 58 relative to carrier 57 by a manual operation.

Carrier 58 also has a hub portion provided with two slip rings 67 and 68, and a flange portion corresponding to the shape of flange 57a, and carrying a second switch means 56. The outermost engaging portions of switch means 55 and 56 are spaced the same radial distance from the axis of shaft'59.

The pair of slip rings 65, 66 is connected to thetwo contacts of spring means 55 by wires 84, and the contacts of switch means 56 are connected by wires 85 to slip rings 67 and 68. The slide contacts 65:: and 66a, and the slide contacts 67a and 68a are connected in parallel and are arranged in the circuit of electromagnetic means 28, as best seen in Figure 3. Therefore, closing of either switch 55, or switch 56, will energize electromagnetic means 28. A manually operated switch 74 is connected into the circuit in series with switch 55 and another manually operated switch 75 is connected in series with switch 56.

When both switches 74 and 75 are closed, actuation of both switches 55 and 56 will effect energization of electromagnetic means 28. However, byoperation of the respective switch 74 and 75, switches 55 and 56 can be selectively disconnected from the circuit so that electromagnetic means 28 will not energize when the respective disconnected switch 55, or 56 is closed.

A stationary support 52 is located adjacent carrier 53, and has arranged in a circle a plurality of guideways 52:: which extend in axial direction of shaft 59 and the carriers 57, 58. Each guideway 52a slidably supports a selector-member 51 which has a manually operated portion provided with a button located on the side of the support plate 52 which is remote from the carriers 57 and 58. Each selector member 51 carries a roller 51a which cooperates with the engaging portions 55a of the first and second switch means 55 and 56. Each selector member 51 is shiftable by a manual operation from the inoperative position shown in solid lines in Figure l to a plurality of operative positions shown in dash and dot lines in Figure 1. In the most advanced position, the roller 51a engages only the engaging portion of switch 55, in an intermediate position roller 51a engages the engaging portions of both switches 55 and 56, and in a third operative position the roller 51 may only engage the engaging portion of switch 56 during rotation of the carriers 57 and 58.

Arresting means are provided for arresting each selector member 51 in its positions, and preferably include a ball 53 urged by a spring 54 into recesses on the shank of the respective selector member 51. The number of recesses in the selector members corresponds to the number of desired operative positions, and one recess is provided for holding the respective selector member in its illustrated inoperative position.

A control member 69 is mounted on a stationary support shiftable between an inoperative position and an operative position shown in dash and dot lines in Figures 1 and 2. The control pawl 63 is engaged by control member 69 in its operative position when carrier 57 rotates. This results in a release of the ratchet pawl 62 from the ratchet wheel 64, and in turning of the carrier 58 relative to carrier 57 under the action of spring 7t). However, carrier 58 can only turn one step since control pawl 63 is immediately released by control member 69, and permits return of locking pawl 62 into its locking position engaging the ratchet wheel 64.

The stepping mechanism 62, 63, 64 is so designed that each angularly turned position of carrier 58 corresponds to a different printing section Z1 to Z10 on theprinting form 2.

In the same manner, each of the selector members 51 is associated with a different printing section Z1 to Z10 on the printing form.

The machine operates in the following manner:

If one, or several selector members 51 are manually shifted to the respective most advanced operative positions in which the roller or rollers 51a engage only the engaging portion of switch means 55, every time the engaging portion 55a is engaged by a roller 51a, the switch 55 is closed, and the electromagnetic means 28 is energized to effect movement of the pressure roller 10 to its printing position. Since carrier 57 rotatesat the same rotary speed as printing roller 1, 'a printing section selected by operation of the respective associated selectormember :1 is printed on the copy sheet. Thereupon the pressure roller is automatically retracted by spring means, not shown, and the copy sheet remains stationary until the next selected printing section Z is located opposite the pressure roller 10. At this moment switch means is again closed by another preset selector member 51, and the electromagnetic means is again energized so that the pressure roller 10 is shifted to printing position and the respective selected printing section of the printing form is printed on the copy sheet adjacent the first selected printing section. During this operation, the switch 56 is not actuated, and consequently can be disconnected by switch 75.

In another operative position of the selector mem bers, the roller 51a is located in the circular paths of both engaging portions of the two switches 55 and 56. Consequently, both switches will be simultaneously actuated by preset selector members 51. If control mem ber 69 is held in its inoperative position, the operation of the device will be the same as if only switch means 55 were actuated.

However, if control member 69 is set to its operative position, it engages the control pawl 63 shortly before the end of each revolution of printing roller 1 and carrier- 57, and effects temporary release of the coupling wheel 64 by locking pawl 62, so that carrier 58 is free to turn under the action of spring in a direction opposite to the direction of rotation of carrier 57 which is indicated by the arrow D in Figure l. The design and construction of the stepping mechanism is such, that after each step, the spring 56 is spaced from spring 55 an angular distance which corresponds to the angular spacing of the selector members 51.

Consequently, assuming that switches 55 and 56 were aligned in axial direction during the first revolution of printing roller 1, only a single selected portion would be printed on the copy sheet assuming that only one selector member was previously set to its operative position engaging both switches 55 and 56. During the second revolution, carrier 58 is already shifted one step relative to carrier 57, and consequently the roller 51a will first engage switch 55, closing the same and effecting printing of the associated selected printing section, and will then engage the engaging portion of switch 56, closing switch 56, and effecting printing of the next following printing section of the printing form adjacent the imprint of the first selected printing section.

For example, if selector member 51 associated with the printing section Z1 is preset to operative position, only the printing section Z1 will be printed during the first revolution of the printing roller. During the second revolution, printing of the printing section Z1 will be repeated under control of switch 55, whereas printing section Z2 will be printed under control of switch 56.

During the next following third revolution of the printingroller, printing of the printing section Z1 will be repeated, but since carrier 58 has turned another step, the printing section Z3 will'be printed on the copy sheet under control of switch 56, and such imprint will'appear on the copy sheet adjacent the imprint of the printing section Z1.

Consequently the apparatus of the presentinvention permits printing of a common headportion Z1, together with successive lines of the printing form.

The knob 58a permits relative turning of the carrier 58 by a manual operation, so that lines of the printing form can be selected before each revolution of the printing roller. It is also possible to place the selector member 51 which is associated with the head portion of the printing form into its most advanced operative position actuating only switch 55 during each revolution, and to set several selector members 51 in the operative position engaging only switch 56 whereby several lines are printed on the copy sheet in addition to the head portion. .During this type of operation, the control member 69 remains in retracted inoperative position.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of duplicating machines differing from the types described above.

While the invention has been illustrated and described as embodied in a duplicating machine for selective printing of successive sections of a printing form, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. 7

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet-between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position;

at least one rotary carrier; switch meansmounted on said carrier and having an engaging portion moving along a circular path during rotation of said carrier, said switch means being electrically connected to said electro-magnetic means and being movable to an actuated position for controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carrier; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carrier between an inoperative position, and an operative position projecting into the path of movement of said engaging portion of said switch means, each selector member in operative position engaging said engaging portion of said switch means during rotation of said carrier for moving said switch means to said actuated position, said selector members being respectively associated with said printing sections; and means connecting said carrier with said printing roller for rotation in timed relation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said switch means whereby printing sections selected by operation of the respective selector member are printed adjacent each other on the copy sheet.

2. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; at least one rotary carrier having an axis of rotation transverse to the axis of rotation of said printing roller; switch means mounted on said carrier and having an engaging portion moving along a circular path during rotation of said carrier, said switch means being electrically con nected to said electromagnetic means and being movable to an actuated position for controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carrier; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carrier between an inoperative position, and an operative position projecting into the path of movement of said engaging portion of said switch means, each selector memberinoperative position engaging said engaging portion of said switch means during rotation of said carrier for moving said switch means to said actuated position, said selector members being respectively associated with said printing sections; and means connecting said carrier with said printing roller for rotation in timed relation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said switch means whereby printing sections selected by operation of the respective selector member are printed adjacent each other on the copy sheet.

3. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; means for connecting said second carrier to said first carrier in a plurality of angularly displaced positions respectively associated with said printing sections; first and second switch means respectively mounted on said first and second carriers, each switch means having an engaging portion moving along a circular path during rotation of said carriers, said switch means being electrically connected to said electromagnetic means and being movable to an actuated position for controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position, and an operative position projecting into the path of movement of said engaging portions of said switch means, each selector member in operative position engaging said engaging portions of said switch means during rotation of said carriers for moving said switch means to said actuated position, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for rotation in timed relation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby printing sections selected by operation of the respective selector member are printed adjacent each other on the copy sheet.

4. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; at least one rotary carrier having an axis of rotation transverse to the axis of rotation of said printing roller; switch means mounted on said carrier and having an engaging portion moving along a circular path during rotation of said carrier, said switch means being electrically connected to said electromagnetic means and being movable to an actuated position for controlling said electromagnetic means to actuate said operating means, said engaging portion being movable in radial direction for moving said switch means to said actuated position; a support located adjacent said rotary carrier; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carrier between an inoperative position, and an operative position projecting into the path of movement of said engaging portion of said switch means, each selector member in operative position engaging said engaging portion of said switch means during rotation of said carrier for moving said switch means to said actuated position, said selector members being respectively associated with said printing sections; and means connecting said carrier with said printing roller for rotation in timed relation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said switch means whereby printing sections selected by operation of the respective selector member are printed adjacent each other on the copy sheet.

5. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; 21 second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting aid first carrier w t s s c n a ri r n inc i g a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to o. releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being electrically connected to said electromagnetic means and being movable to an actuated position controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in operative position engaging said engaging portions of said first and second switch means during rotation of said carriers for moving said switch means to said actuated positions, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed 011 the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of said printing roller under control of said second switch means.

6. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connection said fist carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily dis-- connected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member movable between an inoperative position, and an operative position located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member when said control member is in said operative position; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being electrically connected to said electromagnetic means and being movable to an actuated position controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in operative position engaging said engaging portions of said first and second switch means during rotation of said carriers for moving said switch means to said actuated positions, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of said printing roller under control of said second switch means.

7. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for bolding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said first carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each .other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said firstcarrier and is angularly turned by said stepping mechanism one step relative to said first carrier in a direction opposite the direction of rotation of said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member movable between an inoperative position, and an operative position located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member when said control member is in said operative position; a first switch means mounted onsaid first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being electrically connected to said electromagnetic means and being movable to an actuated position controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in operative position engaging said engaging portions of said first and second switch means during rotation of said carriers for moving said switch means to said actuated positions, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of said printing roller under control of said second switch means.

8. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said first carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being electrically connected to said electromagnetic means and being movable to an actuated position controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position, a first operative position projecting into the path of movement of said engaging portion of said first switch means, a second operative position projecting into the path of movement of said engaging portion of said second switch means, and a third operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in the respective operative position thereof eitecting movement of the respective associated switch means to said actuating position of the same, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet during consecutive revolutions of said printing roller under control of said second switch means.

9. A duplicating machine as set forth in claim 8 and including arresting means for arresting each of said selector members on said support in each of said inoperative and operative positions of the same,

10. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; meansfor feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said first carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rota-tion, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member; a first switch means mounted on said first carrier, and a second switch means mounted on said second car rier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being movable to an actuated position; first and second circuit means respectively connecting said first and second switch means with said electromagnetic means so that said electromagnetic means actuate said operating means when each of said switch means is moved to said actuated position, each of said circuit means including a manually operated switch for selectively disconnecting said first switch means and said second switch means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in operative position engaging said engaging portions of said first and second switch means during rotation of said carriers for movingsaid switch meanstosaid actuated positions, saidselector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite saidpressureroller when the associated selector member actuates said first switch means whereby the same printing section selected byoperation of therespective selector member is printed on the copy sheet during each revolution-of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of said printing roller under control of said second switch means.

11. In a duplicating machine, 'in combination, a rotary printing roller; means for securing to said printing roller a printing form havinga plurality of printing sections; drive means 'for rotating said printing roller; a rotary pressure roller cooperating with saidpr'inting roller;.movable support means for supporting said pressure roller formovement to and from a printing position inclose proximity to said printing roller; operatingmeans connected to said movable support for moving the same and thereby said pressure roller ,to'and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary, when the same is not transported by said rollers in said ,printing position; a first rotary carrier; a second rotarycarrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said first carrier with said second carrier and including acoupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier in a direction opposite the direction of rotation of said first carrier, said second carrier being step-wise movable between ,a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member movable vbetween an inoperative position, and an operative position located in the path of movementof said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to asuccessive position during each revolution of said first carrier member when said control member is in said operative position; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being movable to an actuated position; first and second circuit means respectively connecting said first and second switch means with said elect ma m an tha said eleq m etiomean actuate said operating means when each of said switch means is moved to said actuated position, eachof said circuit means including a manually operated switch for selectively disconnecting said'first switch means and said second switch means; a support located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support 'for movement independently of each other in axial direction of said carriers between an inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first andsecond switch means, each selector member in operative position engaging said engaging portions ofsaid first and second switch means during rotation of said carriers for'moving said switch means to said actuated positions, said selector'members being respectively associated with said printing sections; and means connecting said first carrier with 14 said printing roller for-synchronous rotation so that each printingsection of'said printing form is located opposite saidpressure roller when-the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution'of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of saidprinting roller under control of said second switch means.

12. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotatingsaid printing roller; a rotary pressure roller cooperating with said printing roller; movable-support means forsupporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure rollerto and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copysheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said first carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier, said second carrier'being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member located'in the path of movement of said couplingrnember so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member; a first switch means mounted on said first carrier, and a second switch means mounted -on said second carrier, each jswitch means-having-an engaging portion moving along acircular path-during rotation of said carriers, each of said switch means 'beingmovable to an actuated position; first and secondcircuit means respectively connecting said first and second switch means with saidelectromagnetic means so that said electromagnetic means actuate said operating means when each of said switch means is moved-to said actuated position, each of said circuit means including a manually operated switch for selectively disconnecting said first switch means and said second switch .means; a support located adjacent said rotary carriers; aset of manually operable selector members mounted along a'circle on said support for movement independentlyof each other in axial direction of said carriers between an inoperative position, a first operative position projecting into the path of movement of said'engaging portion of said first switch means, a second operative positionprojecting into the path of movement of said engaging portion of said second switch means, and a third operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in the respective operative position thereof effecting movement of the respective associated switch means to said actuating position of the same, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet during consecutive revolutions of said printing roller under control of said second switch means.

13. A duplicating machine as set forth in claim 7 and including a shaft coaxial with said first and second carriers, said shaft being fixedly connected to said first car- 'rier, and turnably supporting said second carrier; and wherein said shaft is connected to said printing roller for rotation therewith.

14. A duplicating machine as set forth in claim 13 wherein said shaft extends in a direction perpendicular to the axis of rotation of said printing roller; and including gear transmission means connecting said printing roller with said shaft.

15. A duplicating machine as set forth in claim 13 wherein said coupling member is mounted on said first carrier, wherein said stepping mechanism includes a stepping wheel secured to said second carrier and engaged by said coupling member in coupling position, and a spiral spring connecting said stepping wheel with said shaft.

16. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said first carrier. with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier, said second carrier being pairs-of slip rings; asupport located adjacent said rotary carriers; a set of manually operable selector members mounted along a circle on said support for movement independently of eachj other in axial direction of said carriers between an: inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in operative position engaging said engaging portions of said first and second switch means during rotation of said carriers for moving said switch means to said actuated positions, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous-rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a'successive position during each revolution of said first carrier member; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being movable to an actuated position; first and second circuit means respectively connecting said first and second switch means with said electromagnetic means so that said electromagnetic means actuate said operating means when said first and second circuit means including a pair of slip rings, said pairs of slip rings being respectively mounted on said first and second rotary carrier means, each of said first and second circuit means further including a pair of slide contacts respectively engaging said are printed on the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of said printing roller under control of said second switch means.

17. In a'duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller formovement to and from a printing position in close proximity tosaid printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet between said rollers, and for holding the copy sheet stationary when the same is not trans ported by said rollers in said printing position; a first rotary carrier; 'a second rotary carrier axially adjacent said first rotary carrier; a spring loaded stepping mechanism connecting said fist carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier in a direction opposite the direction of rotation of said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member movable between an inoperative position, and an operative position located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member When said control member is in said operative position; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being electrically connected to said electromagnetic means and being movable to an actuated position controlling said electromagnetic means to actuate said operating means; a support located adjacent said rotary carriers, a set of manually operable selector members mounted along a circle on said support for movement independently of each other in axial direction of said carriers between an inoperative position, a first operative position projecting into the path of movement of said engaging portion of said first switch means, a second operative position proj ecting into the path of'movement of said engaging portion of said second switch means, and a third operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in the respective operative position thereof efiecting movement of the respective associated switch means to said actuating position of the same, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing form is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet adjacent the imprint of said first printing section during consecutive revolutions of said printing roller under control of said second switch means.

' 18. A duplicating machine as set forth in claim 17 wherein each of said carriers includes a flange and wherein the respective switch means is secured to said flange, wherein said engaging portions of said first and second switch means are spaced the same distance in radial direction from the axis of rotation of said first and second carrier; wherein said support is a plate having a plurality of axially extending guide means arranged in a circle thereon, each guide means slidably supporting one of said selector members.

19. A duplicating machine as set forth in claim 18 wherein each of said selector members includes an operating portion cooperating with said engaging portions of said first and second switch means, said operating portions being located on one side of said plate, and wherein each of said selector members includes a button portion for manual engagement located on the other side of said plate.

20. In a duplicating machine, in combination, a rotary printing roller; means for securing to said printing roller a printing form having a plurality of printing sections; drive means for rotating said printing roller; a rotary pressure roller cooperating with said printing roller; movable support means for supporting said pressure roller for movement to and from a printing position in close proximity to said printing roller; operating means connected to said movable support for moving the same and thereby said pressure roller to and from said printing position, and including electromagnetic means; means for feeding a copy sheet between said rollers, and for holding the copy sheet stationary when the same is not transported by said rollers in said printing position; a first rotary carrier; a second rotary carrier; a stepping mechanism connecting said first carrier with said second carrier and including a coupling member tending to assume a coupling position so that said carriers are coupled to each other for rotation, and being movable to a releasing position in which said second carrier is temporarily disconnected from said first carrier and is angularly turned by said stepping mechanism one step relative to said first carrier in a direction opposite the direction of rotation of said first carrier, said second carrier being step-wise movable between a plurality of angularly turned positions respectively associated with said printing sections; a stationary control member movable between an inoperative position, and an operative position located in the path of movement of said coupling member so that said coupling member is moved once during each revolution to said releasing position so that said second carrier angularly turns to a successive position during each revolution of said first carrier member when said control member is in said operative position; a first switch means mounted on said first carrier, and a second switch means mounted on said second carrier, each switch means having an engaging portion moving along a circular path during rotation of said carriers, each of said switch means being electrically connected to said electromagnetic means and being movable to an actuated position controlling said electromagnetic means to actuate said operating means; a support; a set of manually operable selector members mounted on said support for movement independently of each other between an inoperative position and an operative position projecting into the paths of movement of said engaging portions of said first and second switch means, each selector member in operative position engaging said engaging portions of said first and second switch means during rotation of said carriers for moving said switch means to said actuated positions, said selector members being respectively associated with said printing sections; and means connecting said first carrier with said printing roller for synchronous rotation so that each printing section of said printing from is located opposite said pressure roller when the associated selector member actuates said first switch means whereby the same printing section selected by operation of the respective selector member is printed on the copy sheet during each revolution of said printing roller under the control of said first switch means, and whereby successive printing sections are printed on the copy sheet during consecutive revolutions of said printing roller under control of said second switch means.

References Cited in the file of this patent UNITED STATES PATENTS 2,210,021 Breitling Aug. 6, 1940 2,815,711 Ritzerfeld Dec. 10, 1957 2,823,604 Ritz-erfeld Feb. 18, 1958 2,843,039 Ritzerfeld July 15, 1958

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