US2847214A - Ejector mechanism for printing machines - Google Patents

Description

Filed March 2, 1955 Aug. 12, 1958 w. RITZERFELD ETAL 2,847,214

' EJECTOR MECHANISM FOR PRINTING MACHINES 10 Sheets-Sheet 1 Inventors WHkdm RH'zev-4e amA (perkar R H'zar @e Bg-WAA '3. W

Aug.12,1958 w. RITZERFELD E-TAL 2,847,214

EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2, 1955 l0 Sheets-Sheet 2 Aug. 12, 1958' -w. RITZERFELD ETAL 23 5 EJECTOR MECHANISM FOR PRINTING MACHINES Filed March}, 1955 10 Sheets-Sheet s Aug. 12, 1958 w. RITZERFELD ETAL 2,847,214

EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2, 1955 IOSheets-Shet 4 Av FM fpe Inventors wmamQvvzerhu W Cvzvkav @H'zev $66 Aug. 12, 1958 w. RITZEIQFELD ETAL 2,847,214

EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2. 1955 1o Sheets-Sheet 5 w. RITZERFELD E'rAL 2,847,214

EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2, 1955 Aug. '12, 1958 .10 Sheets-sheet 6 1958 fi-w. RITZERFELD ETAL 2,847,214

EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2, 1955 I I IOflSjheets-Sheet 7 Inventors:

Aug. 1 2, 1958 W-. RITZERFELD ETAL Filed March 2, 1955 Inventors;

23-.Ww2 s. rnldwy 12,1958 w. RITZIIIRIFEALD EI'AL 2,8475214 EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2, 1955 10 Sheets-Sheet 9 '4 y I [IA R wmwz e. svm

Aug. l2, 1958 w. RITZERFELD ETAL 2,847,214

EJECTOR MECHANISM FOR PRINTING MACHINES Filed March 2, 1955 v 10 Sheets-Sheet 10 jrmentars:

United States Pate t O F EJECTOR MECHANISM FOR PRINTING MACHINES Wilhelm Ritzerfeld, Berlin-Dahlem, and Gerhard Ritzerfeld, Berlin-Grunewalil, Germany Application March 2, 1955, Serial No. 491,574

Claims priority, application Germany 'March '8, 1954 .13 Claims. (Cl. 271-64) The present invention relates to ejector mechanism for printing machines and more particularly to ejector mechanism for rotary duplicating machines of the type in which moistened sheets are imprinted by an inked printing foil.

It is one object of the present invention to provide an ejector mechanism which rapidly ejects printed sheets.

It is another object of the present invention to provide an ejector mechanism by which printed sheets are selectively deposited in diiierent receiving means.

It is a further object of the present invention to provide an ejector mechanism by which printed sheets are selectively deposited on both sides of the machine so that printed sheets may be returned to the supply. side of the machine.

It is also an object of the present invention to provide side-tracking switch means 'in an ejector passage for selectively guiding ejected printed sheets into a plurality 'of receiving compartments.

It is a further object of the present invention to provide sensing means for automatically and selectively operating the side-tracking switch means in accordance with control marks on the supplied sheets.

With these objects in view the present ,inventionmainly consists in a printing machine which comprises a pair of rotary printing rollers and movable ejector conveyor means receiving sheets printed by the printing rollers and moving at a speed higher than the peripheral speed of the printing rollers.

The ejector conveyor means are movable between an inoperative position and an operative position, and control means are provided .for moving the ejector conveyor means to the inoperative position during passing of a sheet through the printingrollers, while the-ejector conveyor means become operative to eject a sheet which is released by the printing rollers.

According-to one embodiment of the present invention the ejector conveyor meanslinclude arocking transferring table and ejector belt means and transporting ejector roller means cooperating with the rocking transferring table which receives printed sheets in one position and transfers the sheets to the ejector means in another position.

The transferring table is advantageously made of a transparent material permitting inspection of the printed sheets. In the event that the transferring table is locked in the sheet-receiving position, a pile of printed sheets is deposited on the table since the ejector belt means are inoperative in this position of the table.

According to a preferred embodiment of the present invention, the sheets are ejected by the ejector means into a guide passage which is provided with a plurality of side-tracking'switch means associated with a plurality of receiving compartments for receiving assorted printed sheets. The side-tracking switch means are either manually operated, or operated by sensing means sensing control perforations in the supplied sheets.

This arrangement permits printing of various *forms 2,847,214 Patented Aug. 12, 19.5.8

ice

which are distinguished by a suitable control mark: The sensing means sense the control-marks and operate side tracking switches in the ejector passage so that, for instance, bill, order blanks, shipping papers, and similar forms can be automatically assorted in difierent receiving compartments. Considerable time is saved .inthis manner since the asserting of printed .forms is a tedious and time-consuming operation. Each departmentof an .organization may receive all the printed copies automatically deposited in one receiving compartment.

According to one embodiment of the present invention, the ejector means is selectively driven in opposite directions for ejecting printed sheets either on the supply side of the machine or on the other side of the machine. This is particularly desirable for operating a rotary duplicating machine which has automatic sheet supply means in order to obtain .a satisfactory piling up of the printed sheets behind the printing line. The same machine can be used for returning manually supplied sheets to the supply side .of the machine which is required for certain printing operations. It may be also desirable-to selee tively eject sheets .of difierent shape, or having different contents on the .supply or on the remote side ofthe machine. Suitable reversing transmission means are provided for reversing the drive of the ejector means.

The .novel features which are considered as .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 .ofoperat'ion, together with additional objects and advantages thereof, will be.best understood from the following description of specific embodimentswhenread in connection with the accompanying drawings, in which: I

Fig. 1 is a side .elevation of a duplicating machine according to .one embodiment of ,the .present invention;

Fig. 2 is a cross-sectional view .taken -.0n line 2-:2in Fig. .1; a

Fig. 3 is a fragmentary side elevation of a modified embodiment of the presentinvention;

.Fig. 4 is a fragmentary side view of the embodiment shown in Fig. 3;.

Fig. 5 illustrates a sheet provided with control perforations;

Fig. 6 illustrates a sheet having another arrangement of control perforations;

.Fig. 7 is a side elevation of an electrically controlled embodiment of the present invention; a

Fig. 8 is a fragmentary .side view .of a ,detail of Fig. .7 shown on an .enlargedscale; 1

.Fig. 9 is a plan view .of the emboldiment shown in ,Fig. 7;

Fig. 1.0 is a side elevation partly in section .of a-modified embodiment of an electrically controlled arrangement according to the present invention;

Fig. 12 is a diagram illustrating the electrical circuit for operating the embodiments shown in Figs. 7 and 1.0.;

.Fig. 13 is a side elevation of a further embodiment of the present invention;

Fig. 14 is a side elevation showing on an enlarged scale a reversing transmission appliedfin the enibodimentof Fig. 13;

.Fig. .15 is a side elevation illustrating the arrangement of Fig. 14 inn different position;

Fig. 16 is a sectional view taken on line C..D in Fig. 13;

Fig. 17 is a side view, partlyin section, of an embodiment of the present invention; and

Fig. 18 is a sectional view taken on line E--F in Fig. 17.

Referring now to the drawings, and moreparticularly to the embodiment illustrated in 'Figs. '1 and ,2, a printing drum or roller of a duplicating machine is engaged by the counter-roller 2 along a printing line. The sheet which is to be printed is supplied from the supply table 4 and is transported to the cooperating printing rollers 1, 2 by the transporting rollers 5 and 6. A moistening device 7 is arranged adjacent the transporting rollers for moistening the sheets as required in a duplicating machine.

The sheet passes between the printing rollers 1, 2 where 1t is printed and is moved to the transferring member 8 which is pivotally mounted on pins 9 for movement between a higher position and a lower position. The shape of the transferring member 8 is best seen in Fig. 2 from which 'it will be apparent that member 8 is a table formed with slotted recesses, and actually consists of a plurality of parallel elongated portions separated by slots extending in the direction in which the sheet is moved by the transporting and printing rollers.

An operating member 10 is pivotally connected to the transferring table 8 and is actuated for shifting the transferring table by linkage means including a connecting rod 13, and a double armed lever 12 which carries a cam follower roller engaging the periphery of a cam means 11. Cam means 11 is connected to the duplicating roller 1 for rotation therewith, and consequently the transferring table is raised and lowered in accordance with the position of the printing roller. The arrangement is such that the transferring table receives a printed sheet in its higher position, and is thereupon shifted to its lower position.

Locking means are provided for locking the operating means for the transferring table 8 and include a lever 14 connected to lever 10 and actuated by an operating rod 15. The operating rod 15 is locked when the transferring table 8 is raised by a locking projection 17 engaging the cutout 16 in the operating rod 15.

Underneath the transferring table 8, ejector belt means are arranged which include a plurality of ejector belts 18 guided about rollers 19. The drive rollers 19 are driven by means which will be described hereinafter in greater detail and at such speed that the ejector belt means 18 move at a speed higher than the peripheral speed of the printing rollers 1 and 2. Y

A plurality of ejector belts 18, best seen in Fig. 2, are provided which are spaced from each other distances corresponding to spacing of the slots in the transferring table 8 so that the ejector belts 18 project into the slots of the transferring table 8 when the same is in its lower position. The conveying surfaces of the ejector belt means 18 are located at the level of the table surface so that sheet supported on the table surface is engaged by the ejector belt means transported along the table 8. Transporting ejector rollers 30 are mounted on levers which are pivotally connected to the table 8 and tend to assume a position in which the rollers 30 frictionally engage the ejector belt means 18. A sheet on the transferring table 8 is urged by the freely rotatable rollers 30 into engagement with the ejector belt means 18.

A table extension 21 is pivotally connected by pivot pins 9 to the transferring table 8 and is provided with an upturned end wall preventing a sliding of sheets beyond the edge of the table. The table extension 21 can be pivoted into a position in which it does not project beyond the casing of the machine in order to facilitate shipping of the apparatus. Preferably, the table 8 is made of a transparent material permitting inspection of the printed sheet during the printing operation. Plexiglas is advantageously used for this purpose.

A receiving means such as a box is provided at the end of the ejector belt means 18 for receiving ejected sheets. The supply table 4 is provided with a pivoted extension 22 which is turned up, when required, to facilitate access to the receiving box 20. Since the ejector belt means move in a direction opposite to the direction of movement of the sheet-engaging peripheral portions of the printing rollers 1 and 2, the sheets are returned to the receiving means 20.

machine isdn'ven by a motor 23 driving a belt 24 which passes over a pulley which is fixed to a pinion 25 meshing with a gear 26 connected to the duplicating roller 1 for rotation therewith. The drive belt 24 is guided over a pulley 27 which is connected by gear means 28 to pulley and belt means 29 including a pulley driving the shaft of the drive rollers 19 of the ejector belt means 18.

During operation of the machine, sheets are consecutively supplied to the printing rollers 1 and 2, printed and deposited on the transferring table 8 in its raised position, whereupon the cam means 11 effect lowering of the transferring table 8 into the position illustrated in Fig. 2 in which the ejector belt means 18 and the counter-rollers 30 engage the sheet and eject it into the receiving means 20. It will be understood that transferring table 8 and the ejector belt means 18 constitute ejector conveyor means for ejecting printed sheets. As pointed out above, the ejector belt means 18 move at a speed higher than the peripheral speed of the printing rollers 1, 2 so that each printed sheet is ejected into the receiving means 20, and the table 8 is returned to its higher position before the next following sheet has passed through the printing rollers 1 and 2. While the sheets are in printing position between rollers 1 and 2, the ejector conveyor means are inoperative.

In the embodiment illustrated in Figs. 3 and 4, the duplicating roller 1 is provided with attaching means for attaching a printing foil 1a and cooperates with the roller 2 as described with reference to the embodiment of Fig. 1. Transporting roller means 32 are urged by resilient means, not shown, into engagement with a drum-shaped ejector roller 31, as best seen in Fig. 4. The ejector roller 31 is driven at such rotary speed that its peripheral speed exceeds the peripheral speed of the printing rollers 1 and 2. The printing sheet is engaged by the ejector roller means 31 and 32 directly after passing through the printing line defined by the engaging surfaces of the printing rollers 1 and 2. Due to the high speed of the ejector roller means 31, 32, the sheet is ejected at high speed into a passage defined by the guide means 35, 36 which are illustrated to comprise a guide wall 36 and another wall 35 which is partly formed of adjacent guide plates. These plates are portions of the side-tracking switch means 47, 48 and 49. Each sidetracking switch means is movable between an inoperative position in which its guide plate is located in the general plane of the wall 35 and a position blocking the passage between the walls of the guide means 35, 36. The switches 47 and 49 are shown in inoperative positions, and the switch 18 is shown in operative position blocking the passage between the walls 35 and 36 for side-tracking sheets passing through the passage. Each side-tracking switch 47, 48, 49 is associated with the receiving means 51, 52, 53, and it will be understood that the operative switch 38 will guide the sheet into the receiving means 52. At the end of the guide means 35,, 36, another receiving means 30 is provided. The switches 47, 48, 49 are operated by operating means comprising the levers 41-46 and manually operated members 37, 38 and 39 which may be locked by a locking member 40 engaging cut-outs in members 37-39.

In the embodiment illustrated in Figs. 7-9, the ejector roller 31 is driven by gear means 54-57 from the printing roller 1, and its peripheral speed is greater than the peripheral speed of the printing rollers 1 and 2. The sheet is either automatically or manually supplied to the supply rollers 5 and 6. The supply rollers 5 and 6 are also driven from the drive means of the printing roller 1 and are rotated by the gear means 58 to 68. A supplied sheet is transported from the supply rollers 5 and 6 to the printing line defined by the printing rollers 1 and 2 and passes through the sensing means M1 to M5 which at the start of the operation are disconnected from the source of voltage shown in Fig. 12 by the open switch 64.

During rotation of the printing roller 1, the cam means 61 engages the cam follower roller 62 of the lever 63.

and closes through lever 63. the main switch 64 so that all sensing means M1 to M are connected to the source of voltage when the sheet to be printed has passed into a position in which its leading edge is located a few millimeters forwardly of the sensing means M1 to M5.

During further movement of the supplied sheet, the circuit of the sensing means associated with a perforation 65 in the sheet, for instance the sensing meansM4, is closed so that the associated electro-magnetic relay means R4 is energized. The attracted armature of the relay operates through a link 66 a spring loaded lever 67 so that the lever 68 is turned by its associated spring 108, best seen in Fig. 8 and turns the associated side-tracking switch 71 into blocking position. Five. side-tracking switch means 69 to 73 are provided in the embodiment of Fig. 7 which cooperate with receiving compartment means 74 to 78, and an additional receiving means 79 is provided at the end of the passage of the guide means 35, 36 for receiving the sheets when all side-tracking switches are in inoperative positions. Similar to the embodiment shown in Fig. 3, the ejecting roller means 31, 32 eject the sheets with such force into the passage 35, 36 that an ejected sheet passes through the entire passage unless side-tracked by a switch.

The cam means 61 has a cam track shaped in such manner that the main contact 64 is opened after the sensing means M1 to M5 have sensed the perforations 65 in a supplied sheet, so that during the same revolution of the printing roller 1, the sensing means M1 to M5 cannot become effective after a sheet has passed through the same and in the interval before the next sheet is fed to the sensing means. Shortly before a revolution of the printing drum 1 is terminated, the cam 80, which is fixedly connected to the printing roller 1, actuates the lever 82 by raising its cam follower roller 81. The operating lever system 83, 84, 85 is downwardly moved and the pins 86 to 91 return the raised operating levers 68 of previously actuated switches to initial position. For instance, the lever 68 in Fig. 7 points upwardly, since the associated switch 71 is in its operative position. When the bar 84 moves downwardly, the pin 88, best seen in Fig, 8, engages the raised lever 68 and pushes the same into the position shown in Fig. 8 in which the lever 67, acting as a catch, holds the lever 68 until the relay R4 is again energized. The clearance means 64, 68 act simultaneously on all switch means.

The control perforations 65 in the sheets are best seen in Figs. 5 and 6, however, in order to assort sheets which are not perforated, or in order to eject a sheet into a receiving means other than the one associated with the perforation of the sheets, manually operated keyboard switch means H1 to H5 are provided. For operating the keyboard switches H1 to H5, it is first necessary to clear the machine by actuating the clearance key.L, see diagram of Fig. 12, whereby the sensing means M1 to M5 are rendered inoperative. Thereupon, anyone of the switches H1 to H5 may be manually operated to eject sheets into the receiving means R1 to R5 associated with the keys H1 to H5. A multiple switch 92 is provided which permits operation of all switch means 69 to 73 while the machine is running or at a standstill.

Figs. and 11 illustrate an embodiment substantially corresponding to the embodiment described with reference to Fig. 7. However, the sheet is not ejected in upward direction, but in horizontal direction, and the ejector means are provided in the form of a conveyor belt cooperating with a pressure roller.

The sheet is supplied by the transporting rollers 6, 60 to the printing rollers 1, 2 and passes through the sensing means M1 to M5 which are connected to a set of relays R1 to R6 in the manner illustrated in Fig. 12.

The printed sheets fall onto the ejector belt means 93 which moves at a speed higher than the peripheral speed of the printing rollers 1 and 2 and, cooperating with the roller means 32, ejects the printed sheets into an assorting receiving means 94, 95. The switches 96 to 101 constitute in inoperative position the bottom wall of a guide passage, while the top wall thereof is constituted by a cover 95 which is pivotally mounted on the casing. When the cover 95 is opened, the compartments of the receiving means 94 are easily accessible for removal of printed and assorted sheets. When the multiple bridging switch 92 is operated, see Fig. 12, the electro-magnetically controlled side-tracking switches 96 to 101 are opened by the operating levers 102 to 107 due to the action of the energized relays R1 to R6 so that all receiving compartments in the receiving means 94 are accessible.

In the embodiment illustrated in Figs. 13 to 15, the printing rollers 1, 2 transport the printed sheets 3 to a pivoted transferring table 8 which is constructed and operated in the same manner as the transferring table 8 described with reference to Figs. 1 and 2. The pivoted transferring table receives in a raised position the printed sheet, and is then lowered due to the action of the cam means 11 and the linkage means 1115. In its lower position, the transferring table cooperates with the ejector belt means 93, as described with reference to Fig. 2, so that the sheets are ejected.

In the arrangement of Fig. 13, the direction of movement of the ejector belt means 93 can be reversed, so that the sheet is ejected either into the receiving means 128 or into the receiving means 127. The reversing transmission means for the ejector belt means 93 are best seen in Figs. 14 and 15. The ejector belt 93 passes about rollers 109 and 110. A pulley 111 is connected to the roller 109 about which a belt loop 112 passes. The belt loop 112 also passes about a resiliently mounted belt tensioning pulley 124 and about a pulley 114 which is freely rotatable on the shaft 113. The belt 112 is driven in two opposite directions by the reversing pulleys 115, 116, the pulley 115 being effective in the position of Fig. 14, and the pulley 116 being effective in the position of Fig. 15. 118 which passes over the transmission pulley 119. Pulley 119 is driven by the drive pulley 121 which is rotated by the motor 120, as best seen in Fig. 16. The pulleys 124, 115 and 116 are mounted on a shiftable pulley support 117 permitting shifting of the pulleys 115 and 116 between the positions shown in Figs. 14 and 15. The support 117 is operated by an operating rod 122 provided with two cutouts permitting locking of the operating rod 122 to the casing wall 123.

In accordance with the position of the operating means 122, the direction of movement of the belt 112 is reversed, whereby the direction of the sheet-supporting surface of the ejector belt means 93 is also reversed so that the ejected sheets are either deposited in the receiving means 127 or in the receiving means 128 which are located on opposite sides of the printing rollers. It will be understood that the return of sheets into the receiving means 127 on the supply side of the printing rollers will permit a very simple operation in the event that it is desired to run the sheets a second time through the printing rollers.

The entire reversing pulley transmission is adjustably mounted on the shaft 126 so that the tension of the belt can be adjusted. The belt 125 passes over a pulley 125a, see also Fig. 16, which drives the printing roller 1 through gear means 1251:.

Referring now to Fig. 16, the shaft 126 passes through the base of the machine and supports the main bearing 129 in which the hollow shaft 113 is mounted. The hollow shaft 113 is provided with a slot 130. The two transmission pulleys 133 and 135 are freely turnable on shaft 113 and are provided with axially extending key grooves cooperating with a manually operated coupling member 131. A spring 132 urges the coupling member 131 into a coupling position projecting out of the slot in the hollow shaft 113 for engaging one of the Pulleys 115 and 116' are driven by a belt transmission pulleys 133 and 135. An operating member 136 passes into the interior of the hollow shaft and is connected to the coupling member 131 for shifting the same in axial direction between two positions for selectively coupling the transmission pulleys 133 and 135 to shaft 113. A disc 134 is arranged between the pulleys 133 and 135 and has a projection projecting into the slot 130 for pressing the coupling member 131 into an inoperative position during shifting of the same so as to prevent engagement of both transmission pulleys by the coupling member 131.

The pulley 119 is fixedly connected with the transmission pulley 135 and operates the belt 118 by which the ejector belt 93 is driven. The pulley unit 135, 119 is driven from motor 120 through the belt 137 so that the hollow shaft 113 and the printing roller 1 are operate at different speeds by the transmission pulleys 133 and 135 when the coupling member 131 is shifted, while the ejector belt 93 is driven at a constant ejector speed which is higher than the peripheral speed of the printing rollers.

In the embodiment shown in Figs. 17 and 18, the duplicating roller 1 carries a printing foil 1a and cooperates with the counter-roller 2 to print the supplied sheets which move to the transferring table 8. The arrangement corresponds to the embodiment described with reference to Fig. 13, but the transmission means are arranged in a somewhat different manner.

The ejector belt means continuously move about the rollers 109 and 110, and are driven from the pulley 111 which is fixedly connected to roller 199. Belts 138 or 139 pass over pulleys 140 and 141 which are freely rotatable on shaft 113. The coupling member 131 can be shifted for coupling any one of the pulleys 140 or 141 to the shaft 113 as described with reference to Fig. 16. Since the belt 139 is crossed in contrast to belt 138, the direction of movement of the sheet transporting surface of the ejector belt means 93 is reversed when the coupling member 131 is shifted. The crossed belt 139 is guided over a guide pulley 149 which consists of two conical portions whereby excessive friction is prevented. The axial shifting of the coupling member 131 is carried out by means of a forked-operating member 136a having projections engaging a grooved disc 13612 which is fixedly secured to the operating rod 136' of the coupling member 131.

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 printing machines differing from the types described above.

While the invention has been illustrated and described as embodied in a sheet ejector and assorting mechanism for a rotary duplicating machine, 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.

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 rotary duplicating machine, in combination, a pair of cooperating rotary printing rollers for printing sheets passing between the same in one direction from one side of said printing rollers to the other side of the same; a transferring table pivotally mounted at said other side of said printing rollers and being movable between a first position for receiving printed sheets from said printing rollers and a second angularly displaced position; ejector means moving in a direction opposite to said one direction at a speed higher than the peripheral speed of said printing rollers and cooperating with said transferring table in said second position of the same .to eject sheets supported on said transferring table; cam means connected to one of said printing rollers for rotation therewith; linkage means connected to said transferring table and ineluding cam follower means cooperating with said cam means for moving said transferring table between said positions of the same in accordance with the angular position of said one printing roller; and receiving means for receiving sheets ejected by said ejector means and being located at said one side of said printing rollers.

2. In a printing machine, in combination, a pair of cooperating rotary printing rollers for printing sheets passing between the same in one direction from one side of said printing rollers to the other side of the same; a transferring member mounted at said other side of said printing rollers and being movable between a first higher position for receiving printed sheets from said printing rollers and a second lower displaced position; locking means for "locking said transferring member in said first higher position; ejector means moving in a direction opposite to said one direction at a speed higher than the peripheral speed of said printing rollers and cooperating with said transferring member in said second position of the same to eject sheets supported on said transferring member; control means driven from said printing rollers and being connected to said transferring member for moving the same between said positions; and receiving means for receiving sheets ejected 'by said ejector means and being located at said one side of said printing rollers.

3. In a printing machine, in combination, a pair of cooperating rotary printing rollers for printing sheets passing between the same in one direction from one side of said printing rollers to the other side of the same; a transferring table pivotally mounted at said other side of said printing rollers and being movable between a first position for receiving printed sheets from said printing rollers and a second angularly displaced position, said transferring table being formed with a plurality of parallel slots extending in said one direction; ejector belt means moving at a speed higher than the peripheral speed of said printing rollers and being located in said slots in said second position of said transferring table to eject sheets supported on said transferring table; control means driven from said printing rollers and being connected to said transferring table for moving the same between said positions; and receiving means for receiving sheets ejected by said ejector means.

4. In a printing machine, in combination, a pair of cooperating rotary printing rollers for printing sheets passing between the same in one direction from one side of said printing rollers to the other side of the same; a transferring table pivotally mounted at said other side of said printing rollers and being movable between a first position for receiving printed sheets from said printing rollers and a second angularly displaced position, said transferring table being formed with a plurality of parallel slots extending in said one direction; ejector belt means moving in a direction opposite to said one direction at a speed higher than the peripheral speed of said printing rollers and being located in said slots in said second position of said transferring table to eject sheets supported on said transferring table; transporting ejector roller means movably mounted on said transferring table and tending to engage said ejector belt means in said second position of said transferring table for conveying a sheet; control means driven from said printing rollers and being connected to said transferring table for moving the same between said positions; and receiving means for receiving sheets ejected by said ejector means and located on said one side of said printing rollers.

S. In a duplicating machine, in combination, a pair of rotary printing rollers for printing sheets passing between the same in one direction from one side to the other side of said printing rollers; 21 table located at said other side of said rollers and being pivotable between a first position for receiving printed sheets from said printing rollers and a second angularly displaced position, said table being formed with a pluralityof slots extending in said one direction; mov able ejector conveyor means located at said other side behind said printing rollers for ejecting printed sheets, said ejector conveyor means located in said slots in said second position of said table'and including ejector belts moving at a speed higher than the peripheral speed of said printing rollers and movably mounted freely rotatable transporting rollers located above said ejector belts and tending to frictionally engage said ejector belts in said second position of said table; drive means for driving said ejector belts and at least one of said printing rollers; manually operated reversing transmission means connecting said drive means with said ejector belts for reversing the direction of movement of the same; and two receiving means located, respectively, at opposite ends of said ejector Ibelts for receiving sheets ejected by said ejector conveyor means.

6. In a duplicating machine, in combination, a pair of rotary printing rollers for printing sheets passing between the same in one direction from one side to the other side of said printing rollers; a table located at said other side of said rollers and being pivotable between a first position for receiving printed sheets from said printing rollers and a second angularly displaced position, said table being formed with a plurality of slots extending in said one direction; movable ejector conveyor means located at said other side behind said printing rollers for ejecting printed sheets, said ejector conveyor means located in said slots in said-second position of said table and including ejector belts moving at a speed higher than the peripheral speed of said printing rollers and movably mounted freely rotatable transporting rollers located above said ejector belts and tending to frictionally engage said ejector belts in said second position of said table; drive roller means for driving said ejector belts; a set of first pulleys, one of said first pulleys being connected to said drive roller means for driving the same; a belt loop passing around said set of first pulleys; a movable support movable between two positions; a set of second pulleys mounted on said movable support and including two reversing pulleys, each of said reversing pulleys engaging in one of said two positions of said supporting means, said belt loop for moving the same in opposite directions; and operating means for moving said supporting means between said positions.

7. In a duplicating machine, in combination, a pair of rotary printing rollers for printing sheets passing between the same in one direction from one side to the other side of said printing rollers; a table located at said other side of said rollers and being pivotable between a first position for receiving printed sheets from said printing rollers and a second angularly displaced position, said table being formed with a plurality of slots extending in said one direction; movable ejector conveyor means located at said other side behind said printing rollers for ejecting printed sheets, said ejector conveyor means including ejector belts located in said slots in said second position of said table and-moving at a speed higher than the peripheral speed of said printing rollers and movably mounted freely rotatable transporting rollers located above said ejector belts and tending to frictionally engage said ejector belts in said second position of said table; drive roller means for driving said conveyor belts; a hollow shaft being formed with a slot; a pair of freely rotatably transmission pulleys mounted on said hollow shaft; belt and pulley means connecting one of said transmission pulleys with said drive roller means; transmission means connecting said hollow shaft with said printing rollers; drive motor means for driving said transmission pulleys; and a manually operated coupling member slidably mounted within said hollow shaft for axial movement, said coupling member being transversely movable between; a position located within said shaft and a coupling position projecting through said slot out of said shaft; means urging said coupling member into said coupling position; and operating means projecting into said shaft and being connected to said coupling member for shifting the same in axial direction between one position in. which said coupling member in said coupling position engages one of said transmission pulleys and another position in which said coupling member engages the other of transmission pulleys in said coupling position for coupling the respective transmission pulley to said hollow shaft.

8. In a duplicating machine for forming imprints on moistened copy sheets, in combination, a rotary duplicating roller and a counter pressure roller cooperating with each other for printing copy sheets passing between the same in one direction from one side of said rollersto the. other side of the same; a transferring table having a top face and being pivotally mounted at said other side. of said rollers for movement between a first higher position for receiving on the top face thereof copy sheets from said rollers and a second lower angularly displaced position, said transferring table being formed with a plurality of parallel slots extendingin said one direction; movable ejector belt means located underneath said transferring table in vertical alignment with said slots and. projecting through said slots slightly above said top face of said table in said second lower position of said table to transport and eject printed copy sheets deposited on the top face of said transferring table; transporting ejector roller means movably mounted on said transferring table and being located vertically above said slots, said ejector roller means tending to engage said ejector belt. means in said second position of said transferring table for conveying a sheet; control means including cam means driven by said duplicating roller, and linkage means injcluding a cam follower means engaging said cam means, said linkage means being connected to said transferring table for moving the same between said positions; and receiving means for receiving sheets ejected by said ejector belt means.

9. In a duplicating machine for forming imprints on moistened copy sheets, in combination, a rotary duplicating roller and a counter pressure roller cooperating with each other for printing copy sheets passing between the same in one direction from one side of said rollers to the other side of the same; a transferring table having a top face and being pivotally mounted at said other side of said rollers for movement between a first higher position for receiving on the top face thereof copy sheets from 'said rollers and a second lower angularly displaced position, said transferring table being formed with a plu- 'rality of parallel slots extending in said one direction;

movable ejector belt means located underneath said transferring table in vertical alignment with said slots and projecting through said slots slightly above said top face of said table in said second lower position of said table 'and moving in a direction opposite to said one direction to transport and eject printed copy sheets deposited on the top face of said transferring table; transporting ejector roller means movably mounted on said transferring table and being located vertically above said slots, said ejector roller means tending to engage said ejector belt means in said second position of said transferring table for conveying a sheet and being inoperative in said first position of said transferring table; control means including cam means driven by said duplicating roller, and linkage means including a cam follower means engaging said cam means, said linkage means being connected to said transferring table for moving the same between said positions; and receiving means for receiving sheets ejected by said ejector belt means.

10. In a duplicating machine for forming imprints on moistened copy sheets, in combination, a'rotary duplicating roller and a counter pressure roller cooperating with each other for printing copy sheets passing between the same in one direction from one side of said rollers to the other side of the same; a supply table located at said one side of said rollers and at least partly consisting of a transparent material, said supply table having a pivoted extension; a transferring table having a top face and being pivotally mounted at said other side of said rollers for movement between a first higher position for receiving on the top face thereof copy sheets from said rollers and a second lower angularly displaced position, said transferring table being formed with a plurality of parallel slots extending in said one direction; movable ejector belt means located underneath said transferring table in vertical alignment with said slots and projecting through said slots slightly above said top face of said table in said second lower position of said table and moving in a direction opposite to said one direction to transport and eject printed copy sheets deposited on the top face of said transferring table; transporting ejector roller means movably mounted on said transferring table and being located vertically above said slots, said ejector roller means tending to engage said ejector belt means in said second position of said transferring table for conveying a sheet and being inoperative in said first position of said transferring table; control means including cam means driven by said duplicating roller, and linkage means including a cam follower means engaging said cam means, said linkage means being connected to said transferring table for moving the same between said positions; and receiving means for receiving sheets ejected by said ejector belt means, said receiving means being located underneath said supply table and said pivoted extension of the same so that said copy sheets are accessible when said pivoted extension is turned.

11. In a duplicating machine for forming imprints on moistened copy sheets, in combination, a rotary duplicating roller and a counter pressure roller cooperating with each other for printing copy sheets passing between the same in one direction from one side of said rollers to the other side of the same; a transferring table having a top face and being pivotally mounted at said other side of said rollers for movement between a first higher position for receiving on the top face thereof copy sheets from said rollers and a second lower angularly displaced position, said transferring table being formed with a plurality of parallel slots extending in said one direction; locking means for locking said transferring table in said first position; movable ejector belt means located underneath said transferring table in vertical alignment with said slots and projecting through said slots slightly above said top face of said table in said second lower position of said table and moving in a direction opposite to said one direction to transport and eject printed copy sheets deposited on the top face of said transferring table; transporting ejector roller means movably mounted on said transferring table and being located vertically above said slots, said ejector roller means tending to engage said ejector belt means in said second position 12 means for receiving sheets ejected'by said ejector belt means.

12. In a duplicating machine'for forming imprints on moistened copy sheets, in combination, a rotary duplicating roller and a counter pressure roller cooperating with each other for printing copy sheets passing between the same in one direction from one side of said rollers to the other side of the same; a transferring table having table having a top face and being pivotally mounted at said other side of said rollers for movement between a first higher position for receiving on the top face thereof copy sheets from said rollers and a second lower angularly displaced position, said transferring table being formed with a plurality of parallel slots extending in said one direction; movable ejector belt means located underneath said transferring table in vertical alignment with said slots and projecting through said slots slightly above said top face of said table in said second lower position of said table and moving in a direction opposite to said one direction at a speed substantially higher than the peripheral speed of said duplicating roller to transport and eject printed copy sheets deposited on the top face of said transferring table; transporting ejector roller means movably mounted on said transferring table and being located vertically above said slots, said ejector roller means tending to engage said ejector belt means in said second position of said transferring table for conveying a sheet and being inoperative in said first position of said transferring table; control means including cam means driven by said duplicating roller, and linkage means including a cam follower means engaging said cam means, said linkage means being connected to said transferring table for moving the same between said positions; and receiving mean for receiving sheets ejected by said ejector belt means.

13. In a printing machine, in combination, a pair of cooperating rotary printing rollers for printing sheets passing between the same in one direction from one side of said printing rollers to the other side of the same; a transferring member mounted at said other side of said printing rollers and being movable between a first higher position for receiving printed sheets from said printing rollers and a second lower displaced position; ejector means including at least one belt moving in a direction opposite to said one direction at a speed higher than the peripheral speed of said printing rollers, said belts cooperating with said transferring member in said second lower position of the same to eject sheets supported on said transferring member; control means driven from said printing rollers and being connected to said transferring member for moving the same between said positions so that said transferring member receives each printed sheet in said first higher position and thereupon moves with said printed sheet to said second lower position to transfer the printed sheet to said belt; and receiving means for receiving sheets ejected by said ejector means, said receiving means being located at said one side of said printing rollers.

References Cited in the file of this patent UNITED STATES PATENTS 2,220,283 Ritzerfeld Nov. 5, 1940 2,389,848 Gibson Nov. 27, 1945 2,590,179 Johnson Mar. 25, 1952

Images