FR2513180A1 - PRESS WITH PLATINUM FOR PRINTING NOTABLY CARDS - Google Patents

Abstract

THE INVENTION RELATES TO PLATINUM PRINTING PRESSES. IT RELATES TO A PRESS HAVING SEVERAL PLATES 12 MOUNTED ON A MOBILE TURRET 10 WHICH ROTATES BETWEEN A LOADING STATION 17, A FIRST PRINTING STATION 14, A SECOND PRINTING STATION 15 AND A UNLOADING STATION 18. LOADING, PRINTING AND UNLOADING ARE PERFORMED PRACTICALLY SIMULTANEOUSLY, THE PRINTED CARDS BEING RETAINED BECAUSE THE PLATES PROVIDE SUCTION. APPLICATION TO PRINTING CARDS AND TICKETS.

Description

The present invention relates to a printing process

  In particular, it relates to methods and printing presses of pre-cut blanks such as small tickets and small cards, including business cards. None of the current small print processes

  cards does not give full satisfaction.

  In a first method of printing cards of

  visit, a number of maps are printed simultaneously

  The entire map can then be subjected to a thermographic treatment in which a powder is applied to the map and sticks to the printed characters.

  the surplus being removed by hand or semi-

  Mechanical Heating is then assured After heat treatment in which the powder melts, the printing of the card takes a simulated effect of relief When the cards

  must then be cut with reasonable precision.

  each sheet must be sheared or cut to size

  or each sheet can be stacked with only one or two other sheets at maximum, so that

is relatively slow.

  The cleanliness and sharpness of the cutout depend on the shear or cutter used. In addition, the alignment of the sheet during printing on all the caps, according to a given grid, may present a certain inaccuracy and a second possibility of error is due to the alignment of the shear which may cause a misalignment of the print and / or a size variation of a card to

another.

  In fact, it is desirable to print business cards or other small sized cards from

  pre-cut blanks These can be purchased in

  quets having very different dimensions; in each package, the size of the cards is the same with great precision and the edges of the cards are cut clearly. Thus, the printed cards can be stacked neatly and can give a good presentation for the buyer. was very expensive so far to print small individual cards especially when

  the print must be close to the edges because of the different

  ficulty of handling presented by the cards. An important disadvantage common to known printing processes is that they are not easily adaptable to

  two-color printing and heat treatment

  In the processes described above, a card must be printed with an ink of a first color then must be coated with powder and then thermographically partially treated until the powder sticks in ink; the

  card is then printed with another color, another

  dre is applied and both colors are fixed by

  thermography, so that the operation is very long

  The alignment of the two prints also presents difficulties. Thus, the invention relates to a platen printing press comprising a plurality of printing stations, at least

  a turntable and a device intended to place the

  the platen or platens in the marked position so that multiple prints can be made on a sheet material retained on the platen without

  removed between the marked positions.

  The plate is advantageously mounted on a

  The printing stations can be distributed around the circumference of the turret or they can be placed around the axis of rotation, but at an axial end of the turret.

the turret.

  The turret preferably has several plates, the actual number corresponding to the number of functions to be filled, that is to the number of separate prints increased by

loading and unloading.

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  Other features and advantages of the

  will be better understood by reading the description

  which will follow examples of embodiment and with reference to the accompanying drawings in which: Figure 1 is a schematic plan view of a

  turret arrangement having a plurality of turntables, according to the

vention;

  Figure 2 is a perspective of a

  printing plete made according to the invention; Figure 3 is a sectional plan of the platen of the press, in the form of a turret; Figure 4 is a vertical elevation of a face of the plate; and Figures 5, 6 and 7 show three variants

  printing press according to the invention, in schematic form.

  tick. FIG. 1 represents schematically and in plan,

  a multi-turn turret for a printing press

  The turret 10 is mounted so that it can

  The machine is intended to provide a two-color printing of each card, and it has four plates 12 which receive a sheet material during printing for example of individual cards.

  it has two printing stations 14, 15 Print Heads

  sion move in translation relative to the decks

  as indicated by the arrow 16 On the third side of the

  10, a device 17 for supply and trans store -

  puts the cards 13 one by one at the turntable After the impres-

  the cards are released from the fourth side of the turret

  and trained as indicated by reference 18 Any provision

  tif suitable can be used to maintain the cards on the decks and, in the particular case considered, the plates are in the form of suction pads, a depression being maintained from inside the turret as long as the

  cards are kept on the decks.

  Figure 2 shows a complete press of

  The press has a base frame 20 mounted on wheels 21 It has two main parts, the first being the part 22

  printing and the second a part 23 of heat treatment

  Part 22 has a multi-plane turret 24

  tines, the principle of which has already been described with reference to

  FIG. 1, the details being described below in reference

  FIGS. 3 and 4 The press has a main switch cabinet 25, a control panel 26 and compressors and vacuum pumps 27 A magazine 30 is intended to contain pre-cut blanks which must be printed. A transfer mechanism 31 is intended to extract the blanks one by one from the magazine 30 and to transmit them one by one to the first plate of the turret 24 The second and the third turntable of the turret 24 are placed near the first and the second head of the turret 24. printing 32, 33 Each

  printhead has a separate reservoir 34 of ink, the re-

  tanks containing inks whose colors are different

  The fourth stage of the turret is located at the evacuation station and a card that has been printed is released there so that it passes into the part 23 of treatment

thermographic press.

  The thermographic treatment portion comprises a dusting device 35, a conveyor 36, a disintegrator

  heater 37 and a cooling fan 38

  Completed cards are evacuated in a tray 39.

  When released by the fourth platen, the cards slide along an inclined plate 40 and are then moved on the wafer by a conveyor belt 41> in the direction of the arrow A hopper 42 contains a printing powder embossed which is transported to the

  high by a conveyor belt 43 The printing powder

  relief is poured from the top of the trans-

  carrier 43 on the map that goes underneath so much that the

  powder necessary for thermographic treatment adheres to the

  cre still wet A small vibrator causes expulsion

  excess powder by shaking The rest of the heat treatment

  is entirely classical and is not described more

in detail.

  During operation, the turret 24 rotates accurately 900 at each step At each stop, the four plates are accurately positioned at the four positions their surface being vertical The support 44 of the tourell

  24 is relatively massive so that the turret can

  carry the forces applied by the printheads 32, 33 when they operate These heads and their ink tank and the forms and the necessary inking mechanisms are of conventional type and are not described

in detail.

  The operation of the press is as follows.

  From the initial rest position, a

  first card is removed from store 30 and is

  The transfer mechanism 31, which preferably operates with suction pads, on the plate which is at that moment in front of it. The turret 24 then turns 90 so that the card is at the first position impression During the next stop, a second card

  is applied to the next stage and a first

  pressure is executed on the first card by the head 32.

  Turret 24 turns 90 again, and a third

  card is applied to the deck while the second car-

  is printed for the first time by the first press 32 and the first card is printed for the second time by the second head 32 After a third rotational movement, the first card reaches the evacuation station and it can fall on the carrier At this moment, the four plates of the turret 24 are in operation, and a fourth rotational movement places the first plate which is then empty again in the initial position, allowing

  setting up a new map.

  As described hereinafter, the turret 24 uses a suction circuit for

  the retention of the cards on the decks, allowing a func-

  extremely fast and convenient.

  placement of the turret 24 under the action of the head of

  pressure is minimal thanks to support 44, a slight displacement

  As a result, the operations of the heads 32, 33 are not rendered synchronous so that the displacement of the plate caused by one of the heads

  does not cause smearing of a simul-

  At the same time, there is a certain delay between the two operations so that the turret 24 can return to its fixed central position before the second printing is executed.

  We now consider the construction of the

  24 with reference to FIGS. 3 and 4 The section of FIG.

  Figure 3 indicates that the turret has essentially one

  The block 56 has a central vertical bore 50 provided with a coating 51. It is mounted in such a way that it can

  turn on a vertical sleeve 52 which has three bore holes

  53 and an external milled slot 54 which ensures the

  between the three bores 53 The slot 54 is dis-

posed on 270 'exactly.

  Four horizontal radial bores 55 formed in the block 56 communicate with the bores 53 and the slot 54 The bores 55 communicate with a cavity or a series of cavities 57 covering the four vertical surfaces of the block 56 A platinum plate 58 is bolted to each face The plate 58 has a large number of small holes 60 distributed over its entire surface. Thus, a depression exerted in the sleeve

  central 52 is transmitted through the bores 53, 55 and the

  57 and gives a uniform suction effect in the central zone of the plate 58. This effect is maintained during 270 rotation of the turret, optimally, and

  is only deleted in the last range

  rotation angle of about 5, when the bore 55 has

  3 is completely separated from the slot 54. In its last marked position, the evacuation bore 61 ensures the communication with the outside and the depression exerted on the plate which is at this position is completely eliminated. This deck is then at

  evacuation station of the printing press.

  A removable sheet 62 of a porous material is advantageously fixed on each plate so that the suction effect is evenly distributed more evenly over the entire surface of each plate. In an advantageous embodiment, this sheet material is only 'a weak elasticity

  ticity and therefore forms an ideal surface of platinum for the

  A suitable material is known by the name of

  nation "Vyon" and is available from Porvair Limited.

  This material has another advantageous characteristic It retains a slight transverse curvature, given an operation of apation performed on one side only of the sheet This one thus has the advantage, although it is

  nominally flat when it is on the plate 58, of

  come naturally to its curved form by elasticity when

  depression is suppressed so that it ensures evacuation

  the card placed before its surface.

  Such a set of plates is very useful

  simple since guiding elements intended for positioning

  and keeping the cards on the decks are super-

  Thus, the entire surface of the cards is free for printing, and lines up to the edge can be used. In addition, a constant line can be formed on a

  edge of the plate so that it constitutes a reference

  rence for mounting all printing materials so that feeding and alignment is simplified The surface that is not covered by a blank can be hidden

by a sticky tape.

  Other arrangements can be used to

  that several impressions are made with one or more

  In a first variant, it is obviously possible to use a turret having more than four faces, for example six, and the turret must then rotate by the necessary angle. A second variant is represented. in FIG. 5 In this case, a turret 70 is made so that it rotates about a horizontal axis 71 The turret rotates again by 90 but the four plates 72 are arranged

8 2513180

  The four stations still correspond to the feeding, the first impression, the second impression and the evacuation, the latter being at

lowest position.

  Figure 6 shows a third variant in

  which a plate 80 moves alternately so that

  the is alternately located in the opposite position in front of

  two printheads 81, 82 that move alternately

  on a cart, but not in translation with respect to the

  platinum Another variant is shown in FIG.

  In this case, a continuous belt 90 passes in front

  Tine fixed but elongated 91 suction The belt 90 is porous and a printed card introduced to the location

  92 is retained on the belt A first head 93 of

  The pressure can make a first impression before the card is put in a second position 94 by moving the belt In this position, a second head 94 can provide printing Another movement of the belt moves the card away from the effect of the plateau aspiring 91 so well

it is evacuated at point 96.

  Of course, various modifications can be made by those skilled in the art to the devices and methods which have just been described solely as examples.

  non-limiting without departing from the scope of the invention.

Claims (11)

  1 platen printing press, characterized in that it comprises several printing stations (14,15), at least one plate (12) and a device for placing the printing stations and the platen or the plates in the position marked so that more prints can be performed on the sheet materials held on the plate (12) without the material is removed between the positioning 2 Press according to claim 1, characterized in that   that the plate is mounted on a rotating turret (10).   3 Press according to claim 2, characterized in that the printing presses (14, 15) are distributed around of the turret (10).   4 Machine according to claim 3, characterized in that it further comprises posts (17, 18) for loading, unloading or loading and unloading a   sheet material, distributed around the turret (10).   Press according to one of claims 3 and 4,   characterized in that the turret (10) has a plurality of plates (12) disposed about its axis, so that different functions can be performed substantially simultaneously on all the turntables, the rotating turret (10)   in a predetermined manner before the repetition of the functions.   Press according to claim 5, characterized in that   that two of the different functions are the execution of a first   first impression on a sheet material, at a first printing station (14), and performing a second printing on   sheet material to a second printing station (15).   Press according to Claim 6, characterized in that the execution of the second printing is slightly separated   in the time of the execution of the first impression.   Press according to one of claims 5   at 7, characterized in that one of the different functions   is the loading of a sheet material to be printed.   Press according to one of the claims   at 8, characterized in that one of the different functions is the unloading of a printed sheet material Press according to claim 2, characterized in that the printing stations are arranged at one end axial turret (70).   11 Press according to claim 1, characterized in that the printing stations are placed in a single plane, and the platen and the printing stations can move   mutually parallel and perpendicular to this plane.   Press according to claim 11, characterized in that the plate (80) is moved perpendicular to said plane so as to provide a first impression on a sheet material at a first printing station (81), impression then being moved parallel to the plane, and the plate (80) is then moved perpendicular to the plane so that a second impression is made on the   sheet material to a second printing station (82).   Press according to claim 11, characterized in that at least one first printing station (93) is moved perpendicularly to said plane so that a first print is performed on a sheet material, the platen is then moved parallel to said plane , and at least one second printing station (95) is then moved perpendicularly to said   plan so that a second impression is made on the machine. sheet.   14 Press according to claim 13, characterized in that it comprises a continuous belt (90) intended to ensure   the displacement of the plate parallel to the plane.