EP0587875A1

EP0587875A1 - Device for multicoloured printing

Info

Publication number: EP0587875A1
Application number: EP19930908999
Authority: EP
Inventors: Louis Fardet
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-07
Filing date: 1993-04-06
Publication date: 1994-03-23
Also published as: FR2689450A1; WO1993019941A1; FR2689450B1

Abstract

Ce dispositif est du type comportant au moins deux tampons encreurs (1, 2) de couleurs différentes sur lesquels viennent en appui deux porte-empreintes correspondants (4, 5) susceptibles d'être sollicités en impression par un dispositif de commande mobile inséré dans un châssis-support fixe (3) pour un marquage au moins bicolore. Il se caractérise en ce que le dispositif de commande (10) se compose d'un organe de transmission mobile (12) à action verticale susceptible d'agir sur des bras (8, 9) du porte-empreinte (4, 5), de manière telle qu'un actionnement de l'organe de transmission (12) dans un mouvement de haut en bas provoque le basculement angulaire successif des bras (8, 9) selon des trajectoires sensiblement circulaires et opposées s'effectuant de part et d'autre de la verticale, la trajectoire de l'un étant retardée par rapport à celle de l'autre par des moyens auxiliaires de retardement interposés entre l'organe de transmission (12) et les bras porte-empreintes (8, 9).This device is of the type comprising at least two ink pads (1, 2) of different colors on which two corresponding impression trays (4, 5) bear, capable of being requested for printing by a mobile control device inserted in a fixed support frame (3) for at least two-color marking. It is characterized in that the control device (10) consists of a mobile transmission member (12) with vertical action capable of acting on the arms (8, 9) of the impression tray (4, 5), in such a way that an actuation of the transmission member (12) in an up and down movement causes the successive angular tilting of the arms (8, 9) according to substantially circular and opposite trajectories taking place on either side other than the vertical, the trajectory of one being delayed relative to that of the other by auxiliary delaying means interposed between the transmission member (12) and the impression-bearing arms (8, 9).

Description

MULTI-COLOR PRINTING DEVICE

The present invention relates to a multi-color printing device of the type comprising at least two ink pads of different colors on which come to bear two corresponding impression trays capable of being requested for printing by a mobile control device inserted in a support frame fixed for at least two-color marking.

A device of this type is known from French patent application No. 2 619 757 and relates to a marker assembly on which three plates and three inks are integrally mounted for marking in a single operation. This device operates by rotating the three plates, integral with each other, in a single direction of rotation, because they are arranged on a rotary axis coπτnun.

Each time the plate passes into a printing position, a vertically movable element causes the plate concerned to descend.

As can be seen, this device is relatively complex, because in addition it implements a motor-belt-cam assembly and a torque limiter acting as a clutch during the printing phase. This is necessary because the three plates are integral in rotation.

In addition, it can be estimated that manual adaptation of the device would prove to be difficult because it would involve operator intervention between each printing phase corresponding to a predetermined color.

The object of the present invention is to remedy this drawback and for this purpose relates to a multicolor printing device of the type comprising at least two ink pads of different colors on which

REPLACEMENT SHEET come into support two corresponding impression trays capable of being requested in printing by a mobile control device inserted in a fixed support frame for at least two-color marking, characterized in that the control device consists of a mobile transmission with vertical action capable of acting on impression tray arms articulated on corresponding fixed parts of the support frame and arranged on either side of said transmission member in such a way that an actuation of the latter in a up and down movement causes the successive angular tilting of the impression-holder arms around their articulations according to substantially circular and opposite trajectories taking place on either side of the vertical, the trajectory of a second support arm fingerprints being delayed relative to that of a first impression tray by auxiliary delaying means interposed between the org transmission donkey and the impression arms, these being brought back into their original position successively after printing, by means of elastic return members interposed between said impression arms and an element of the support frame.

The invention will be better understood and other characteristics thereof will be highlighted with the aid of the description which follows, with reference to the appended schematic drawings, illustrating, by way of nonlimiting examples, how the invention can be performed and in which: - Figures 1A to II show in its kinematic principle a printing device according to the invention, according to all of its active phases; FIG. 2 represents in section a transmission member with vertical movement, interposed between a control device and the impression tray arms, according to a first embodiment; Figure 2A shows a cross section of the transmission member along the line

I I -I I of Figure 2; - Figures 2B to 2E schematically represent the kinematics of operation of a printing device equipped with a transmission member according to Figure 2; Figure 3 partially shows in section a transmission member according to a second embodiment of the invention; Figure 3A shows a cross section of the transmission member along the line

III-III of Figure 3; - Figures 3B to 3E schematically represent the kinematics of operation of a printing device equipped with a device equipped with a transmission member according to Figure 3; FIGS. 3F to 31 show the relative position, seen at the end, of an end flat of the transmission member, with respect to an impression tray arm; FIG. 33 represents means for guiding the impression-holding arms actuated by a transmission member according to FIG. 3; Figures A to G schematically represent the kinematics of operation of a printing device equipped with a transmission member according to a third embodiment of the invention; - Figures 5A to 5G schematically represent the kinematics of operation of a printing device equipped with a transmission member, according to a fourth embodiment.

According to the unctioning principle, correcting all the cases shown, the device multicolor printing system according to the invention, comprises two ink pads 1 and 2 of different colors, fixed to an upper part on either side of a fixed support frame 3 and directed generally downwards at an angle of about 4-5 ° from a vertical.

Two corresponding impression trays Ψ and 5 may be requested for printing by a mobile control device which will be described later, inserted in a support frame 3, to ensure two-color marking.

FIGS. 1A to II illustrate particularly well the operation of such a device according to the invention, the kinematics of which are as follows: - release of the impression trays and 5 relative to the ink pads 1 and 2 (FIG. 1B); rotation in the RI direction of the first impression tray Ψ (FIG. 1C), until it has reached the vertical position placing the impression in the printing position on the support to be printed (FIG. 1D); vertical translation according to FI from top to bottom of the impression tray until the printing of the support to be marked (Figure 1D); vertical translation along F2 from bottom to top of the impression tray to release the marked support (Figure 1E); rotation in the R2 direction of the first impression tray • to free the space reserved for printing (Figure 1E); - rotation in direction R3 of the second impression tray 5 until it has in turn reached the vertical position (Figure IF); vertical translation from top to bottom of the impression tray 5 according to F3 until printing of the support to be marked in a different color (FIG. 1G); vertical translation from bottom to top along F4 of the impression tray 5 until the doubly marked support is released (Figure 1H); rotation in direction R of the second impression tray 5 to return to its initial position (FIG. 1H); repositioning of the impression trays and 5 on the ink pads 1 and 2 for re-inking before a new printing (Figure II). It should be noted that all the operations which have just been described are carried out against two elastic return springs 6 and 7 interposed respectively between the fixed support frame 3 and each impression tray and 5 or more precisely of their respective arms 8 and 9 (Figure 1A, 1D).

These operations being identical in all cases of embodiment of the various coirmande devices which will now be described, they will no longer be repeated. According to the embodiment shown in Figures 2 to 2E, the control device 10 comprises a handle 11 on which is exerted a manual or automatic pressure P and capable of acting on a mobile transmission member 12 with vertical action capable of act itself on the arms 8, 9 of the impression trays, 5 above.

The vertically acting transmission member 12 consists of two elements 13, 1 one of which 13 leading and the other led lt are linked to the respective impression arms 8 and 9 and are capable of sliding longitudinally one in the other by means of an interlocking zone constituted by a groove 15 forming a mortise formed on one of the elements, in this case the driven element 1, opposite a tenon 16 corresponding on the other element 13, said elements 13 and 14 being initially capable of sliding simultaneously in a housing 17 of the chassis 3 by mutual drive under the action of an upper handle 11 until a first impression is made by a first impression tray 4.

Successively, a lug 18 in the form of a ramp 19 produced on at least one lateral face of the driven element 14, meets a fixed part 20 of the support frame 3 to cause the separation of a driving spoiler ent 21 produced on a part upper part of the driving element 13 and bearing on the upper part 23 of the driven element 14.

This has the effect of releasing the latter for return to its initial position under the effect of the corresponding return spring 6, while the driving element 13 continues its stroke until making the second impression, its return to its initial position s '' by releasing the pressure P exerted on the handle and under the effect of the corresponding return spring 7.

It should also be noted that the handle 11 has an internal housing 24 allowing the vertical rise of the driven element 14 during its descent idarization with the driving element 13. More specifically, the operation of the control device 10 is as follows: action on the handle 11 according to a pressure P simultaneously causing the descent of the assembly of the transmission member 12 in the housing 17 of the chassis 3. The driven element 14 being longer than the driving element 13, it meets beforehand the impression arm 8 (FIG. 2B) which it drives to a vertical printing position (FIG. 2C); simultaneously but in a delayed manner, the driving element 13 drives, as far as it is concerned, the arm impression tray 9 (Figure 2C); when the ramp 19 of the lug 18 meets the part 20 of the chassis 3, there is a tilting of the driven element 14 causing its desol idar isation of the driving element .13 hence its return to the initial position under the 'influence of the corresponding return spring 6 (Figure 2D); a continuation of the stroke of the handle 11 according to the pressure P no longer acting only on the driving element 13, brings the second impression tray arm into the vertical printing position (FIG. 2E); the release of the pressure P on the handle 11 brings, via the return spring 7, the second arm 9 to the initial position, to make the device available for a new use.

In this case, the impression arms 8 and 9 are articulated with respect to the fixed frame 3 by a common axis of articulation 25, but they are stressed by support points 26 and 27 respectively which are integral with them and located at different distances from the axis of articulation, as a function of the angular offset to be obtained. According to another embodiment shown in Figures 3 to 33, it differs essentially from the previous in that the control member 30 comprises a transmission member 31 with vertical action, consisting of a single element, of circular section 32 at its upper part and having at its lower free end part, opposite to a handle 33, a flat 34 of substantially semi-circular section. The vertical translation along F5 of the transmission member 31 takes place simultaneously with its rotation R5 in a corresponding sleeve 35 under the action of at least one fixed lug 36 of said sheath 35 cooperating with a helical peripheral groove 37 of the transmission member 31, so that the end phase 38 of said member which is perpendicular to the flat 34 is initially supported on a first impression tray arm 8 during a first phase of rotation R5 corresponding substantially to a half-turn, and this until meeting in its vertical and rotary stroke the second arm 9 of the impression tray, moment from which the first arm 8 escapes, according to a predetermined overlap, at the end face 38 of the flat part 34 of the transmission member 31, after having caused a first impression, the continuation of the stroke then acting only on the second arm 9 for a second impression. The rotation R5 of the transmission member 31 relative to the fixed handle 33 is obtained by means of a circlip 39 interposed between a groove in the member 31 and an internal groove in the handle 33.

As shown particularly well in Figures 3B to 3E, the impression arms 8 and 9 are articulated on joints 40 and 41 of the chassis 3, distinctly and angularly offset as a function of the delayed printing effects to be obtained.

In this regard, a detail of embodiment (fig. 33) concerning this same embodiment shows particularly well how the impression-bearing arms 8 and 9 are guided in their opposite semi-circular movements according to RI and R3, this is done by by means of corresponding semicircular grooves 43, 44 offset from one another and produced on at least one fixed side wall of the support frame 3, said grooves 43, 44 extending at their lower end by a vertical part 45, 46, such that the respective joints 40, 41 of each arm 8, 9 of the impression trays, after having described alternately a semi-circular movement along RI, R3, carry out a vertical stroke FI, F3 corresponding to the actual printing phases of the impression trays. According to a third embodiment shown in FIGS. 4 to 4G, the control device 50 comprises a transmission member 51 with vertical action constituted by a single bar of uniform section capable of moving laterally along F5 simultaneously with its vertical movement along F6 , under the influence of a fixed ramp 52 of the support frame 3 on which abuts the end phase 53 of said bar 51, so that during its descent it causes in its passage a first arm 8 of impression tray then a second arm 9 of a second impression tray, offset with respect to the first 8, which arm 8 escapes laterally, after printing according to FI, from said bar 51 which continues its vertical stroke along F6, without further lateral influence along F, along a straight portion 54 following the ramp 52 to drive the second impression-carrying arm 9 towards a second impression in a final vertical stroke along F6. y _*

In this third case, the low impression trays 8 and 9 are guided in their semicircular movements as shown in f ig. 33 previously described.

In its version represented in FIGS. 5A to 5G, the control device 60 consists of a movable transmission member with vertical action 61 constituted by a bar provided with two opposite racks 61 and 62 cooperating with two corresponding toothed pinions 63 and 64 freely mounted on the same axis 65, so as to transform a vertical linear movement F7 and F8 of each rack 61 and 62 into a rotary movement R7 and R8, of said pinions 63, 64 respectively integral with two cams 66, 67 of opposite eccentricity rotating in opposite directions in directions also opposite R9, RIO and angularly offset with respect to each other so that their opposite rotation R9, RIO successively drives the impression trays 8, 9 towards a vertical printing position, by guiding respective lugs 68, 69 which are integral with them ^ in a semicircular groove 70 formed in a fixed part of the support frame 3.

This semi-circular groove 70 is used partly by the lug 68 of the arm 8 and partly by the lug 69 of the arm 9, the intersection of these two parts being materialized by a portion of vertical groove 71 corresponding to a stroke vertical printing of the arm 8 according to FI and successively of the arm 9 according to F3. The operation in successive stages of this embodiment is as follows: the cam 66 influenced in rotation along R9 by a vertical action on the rack 61 in a direction F7 which simultaneously causes the rotation of the pinion 63 in a direction R7 which is integral with said cam 66 drives the latter for action on the first impression tray 8 guided in the groove 70 by means of its lug 68 towards a vertical position in the rotary direction RI; during this time, the cam 67 is rotated along RIO in the same way, that is to say by driving the rack 62 in the direction F8 influencing in rotation along R8 the second pinion 64. For the moment, the rotary movement according to RIO has no action on the second impression arm 9 given the initial neutral shape of said cam 67 (FIG. 5B); after having been driven into its vertical position by means of the cam 66, the impression-carrying arm 8 undergoes an action in the direction FI by translation of its lug 68 in the vertical groove 71 to make a first impression. During this time, the cam 67 continuing to rotate along RIO begins to influence in rotation along R3 the arm 9 of the second impression tray (FIG. 5C); - The cam 66 continuing its rotation along R9 causes the lug 68 to escape from the impression-carrying arm 8 which returns to its initial position under the influence of its return spring. At this moment, the impression arm 9 influenced by the contact of the cam 67 begins its circular movement along R3 by guiding its lug 69 in the groove 70 (FIG. 5D), until driving said arm 9 in a vertical position for a second impression in the vertical direction F3 by guiding its lug 69 in the vertical guiding part 71 (FIGS. 5E and 5F); continued rotation of the cam 67 still in the RIO direction in turn releases the lug 69 of the arm 9 which returns to its initial position under the effect of the corresponding return spring; _ e release of the pressure on the aforementioned racks causes the vertical displacement from bottom to top of these and causes the complete system to go up via the return springs to the initial position.

Claims

1. Multicolor printing device of the type comprising at least two ink pads (1, 2) of different colors on which come to bear two corresponding impression trays (4, 5) capable of being requested in printing by a device for mobile control inserted in a fixed support frame (3) for at least two-color marking, characterized in that the control device (10, 30, 50, 60) consists of a mobile transmission member (12, 31, 51 and 61-62) with vertical action capable of acting on arms (8, 9) of the impression tray (4, 5) articulated on corresponding fixed parts of the support frame (3) and arranged on either side of said transmission member (12, 31, 51 and 61-62) in such a way that an actuation of the latter in an up and down movement causes the successive angular tilting of the arms (8, 9) of impression trays ( 4, 5) around their joints along trajectories (RI, R2, R3, R4) substantially circulating res and opposite taking place on either side of the vertical, the trajectory (R3, R4) of a second arm (9) of impression trays (5) being delayed relative to that (RI, R2) d '' a first impression tray (4) by auxiliary delaying means interposed between the transmission member (12, 31, 51 and 61-62) and the impression tray arms (8, 9), these being brought back in their original position successively after printing, by means of elastic return members (6, 7) interposed between said impression-holding arms and an element of the support frame.

2. Device according to claim 1, characterized in that the mobile .de transmission member (12) with vertical action consists of two elements (13, 14) one of which (13) leading and the other (14) led are linked to the respective impression arm (8 and 9) and are suitable for slide along tudinally one inside the other via an interlocking zone formed by a groove (15) forming a mortise formed on one of the elements, opposite a corresponding tenon ( 16)

5 provided on the other element, said elements (13 and 14) being initially capable of sliding simultaneously in a housing (17) of the chassis (3) by mutual drive under the action of an upper handle (11) up to make a first impression with a first impression tray

10 (4), after which a lug (18) in the form of a ramp (19), produced on at least one lateral face of the driven element (14), meets a fixed part (20) of the support frame (3) to cause desol idar isation of a training spout (21) made on the upper part of

15 the driving element (13) and resting on the upper part (23) of the driven element (14), this having the effect of releasing the latter to return to its initial position under the effect of the return spring corresponding (6), while the driven element (13) continues its stroke until 0 make the second impression, its return to its initial position being effected by release of the pressure (P) and under the effect of the spring corresponding reminder (7).

3. Device according to claim 1,

25 characterized in that the movable transmission member with vertical action (31) consists of a single element, of circular section (32) at its upper part and having at its lower free end part, opposite to a handle ( 33), a flat section (34)

30. substantially semi-circular, the vertical translation (S5) of the transmission member (31) takes place simultaneously with its rotation (R5) in a corresponding sleeve (35) under the action of at least one fixed lug (36) of said sheath (35) cooperating with a groove

35 helical device (37) of the transmission member (31), so that the end face (38) of said member which is perpendicular to the flat (34) is initially supported on a first arm (8) of impression tray during a first phase of rotation (R5),

^ substantially corresponding to a half-turn, and this until meeting in its vertical and rotary stroke the second arm (9) of the impression tray, time from which the first arm (8) escapes, according to a predetermined overlap, the end face (38) of the flat (34) of

J _^ Q the transmission member (31), after having caused a first impression, the continuation of the race then acting only on the second arm (9) for a second impression.

4. Device according to claim 1 or 3, 1 characterized in that the impression-bearing arms (8, 9) are guided in their opposite semi-circular movements, by means of corresponding semi-circular grooves (43, 4) offset from each other and produced on at least one fixed side wall

20 of the support frame (3), said grooves (43, 44) extending at their lower end by a vertical part (45, 46), so that the respective joints (40, 41) of each arm (8, 9) impression tray, after having described in turn a movement

25 semi-circular (RI, R3), perform a vertical stroke (FI, F3) corresponding to the actual printing phases of the impression trays.

5. Device according to claim 1, characterized in that the mobile transmission member to

30 vertical action (51) is constituted by a single bar of uniform section able to move laterally (F5) simultaneously with its vertical movement (F6), under the influence of a fixed ramp (52) of the support frame (3) on which the end phase (53) of the

35 said bar (51), so that during its lowering, it drives in its path a first impression tray arm (8) then a second impression tray arm (9), offset with respect to the first (8), which (8) escapes laterally, after printing (FI), of said bar (51) which continues its vertical course (F6), without any more lateral influence (F5), along a straight part (54) succeeding the ramp (52) to drive the second arm (9) impression tray to a second impression in a final vertical stroke (F6).

6. Device according to claim 1, characterized in that the mobile transmission member with vertical action is constituted by a bar provided with two independent opposite racks (61, 62) cooperating with two corresponding toothed pinions (63, 64) mounted freely on the same axis (65), so as to transform a vertical linear movement (F7, F8) of each rack (61, 62) into a rotary movement (R7, R8), said pinions (63, 64) respectively integral, only during the descent of the racks, two cams (66, 67) of opposite center here, rotating in opposite directions in opposite directions (R, RIO) and angularly offset with respect to each other, in such a way that their opposite rotation (R, RIO) successively drives the impression trays (8, 9) towards a vertical printing position, by guiding respective lugs (68, 69) which are integral with them, in a semi-reulaire groove (70) made e in a fixed part of the support frame (3).