FR2771335A1 - DEVICE FOR PRESENTING COPIES OF A CONTROL UNIT OF A ROTARY PRINTING MACHINE - Google Patents

Abstract

The invention relates to a device for automatic presentation (100) of a reference copy to a control desk (1) of a rotary printing machine. According to the invention, it comprises an endless strip (101) intended for supporting the reference copy, wound around several rollers (102, 103, 104) rotatably mounted on parts of the desk structure, said copy support strip having a visible part (101a) to an operator standing in front of the desk, which stands substantially vertically between two uprights (2, 3) of the desk.

Description

The present invention relates to an automatic presentation device

a reference copy to

  a control desk of a rotary printing machine.

  The invention finds a particularly advantageous application in the field of printing, in particular for duplex printing machines or machines for printing several different copies, which require an operator to control the quality of

different impressions.

  During the operation of a rotary printing machine, an operator constantly monitors the quality of the printing produced by the machine by frequently comparing the produced copies with a reference copy or part of a copy, commonly called

" good for shooting ".

  Such a check is generally carried out on an examination table at the machine control desk

rotary to print.

  Each printed copy leaving the machine is placed on the examination table and compared to the "proof to be drawn"

  correspondent positioned behind the examination table.

  After carrying out such a comparison, the operator can adjust certain parameters of elements of the printing machine at the control console, such as

inking, anchoring etc ...

  In this regard, document EP 582 973 discloses a display or state adjustment device preset in a printing press, comprising means for detecting the state of adjustment of an adjusted adjustment parameter. during a change of print in the press; means for storing a current setting state of said adjustment parameter; preset call status means for calling the setting state of said adjustment parameter which is memorized and display means provided in correspondence with the respective numbered button switch and performing the on / off operation in accordance with the input status of the previous set data and the state of the switches

  individual key operated.

  Generally, when there is only one "good to shoot", this is fixed on a fixed vertical panel positioned behind the examination table where is placed

  the copy produced by the printing machine.

  When there are several vouchers against which the different produced examples are compared, these are positioned either on a panel

  pivotally movable, either on a square drum.

  More particularly, when there are two different "proofs" corresponding for example to the printing of two sides of a copy, these are positioned on the two sides of the movable panel to

  pivoting. When there are four "pulls", these

  these are positioned on the four sides of the square drum

TC (see figure 1).

  The movable panel or the square drum is positioned behind the examination table on the control desk. Such presentation devices include

  however, a number of drawbacks.

  First of all, the manipulation of the mobile panel or the square drum to visualize the "good to pull" chosen, is done manually at arm's length which

  is inconvenient and tiring for the operator.

  In addition, as shown in Figure 1, the square drum TC has a large footprint and is generally interposed between the examination table T and the lighting L provided above it. This results in poor lighting of the printed copy to be inspected. Finally, whether it is the fixed panel, the pivoting panel or the square drum, these presentation devices include a limited and non-modular capacity for supporting copies.

space not optimized.

  In order to remedy the aforementioned drawbacks, the present invention provides a new device for presenting a reference copy, which has an ergonomics adapted to that of the existing examination tables, with a reduced bulk, while being able to support several reference copies. different, and can be easily operated by the operator without

particular physical effort.

  More particularly, the present invention provides a device for automatically presenting a reference item to a control desk of a rotary printing machine, which comprises an endless strip intended to support the reference item, wound around several rollers rotatably mounted on structural parts of the desk, said copy support strip having a part visible to an operator standing in front of the desk which stands substantially vertically between two uprights of the desk. Thus, advantageously according to the invention, the operator can, from the control console, control the rotational drive of at least one roller to scroll the copy support band stretched over the rollers, and position in front of it

the selected reference copy.

  According to the invention, the movement of the copy support strip in front of the operator can be achieved by manual control of electric rotation drive.

  or mechanical of at least one roller.

  According to a variant according to the invention, the scrolling of the copy support band in front of the operator can be achieved by automatic control of the electric or mechanical rotation drive of at least one roller, by means of '' a control system of the printing machine according to the element of the machine to be corrected

selected by the operator.

  According to an advantageous embodiment of the device according to the invention, there are provided three rollers for driving the copy support band, an upper roller, an intermediate roller and a lower roller. The intermediate roller can be moved in translation in a substantially horizontal direction between a distant position and a position close to the front edge of the control console in front of which the operator stands, and the lower roller is movable in vertical translation, so that the visible part of the support strip can be approached

operator.

  Thus, the operator can, without making any physical effort, inspect more closely a part of the reference item which is close to the item produced by the machine in place on the examination table. According to the invention, the copy support strip can be made of flexible reinforced material. The frame of said exemplary support strip may include metallic or magnetic elements authorizing the fixing of the reference item (s) on said support strip by magnetic or metallic studs. The exemplary support band can be made of plastic, or even be a metal mesh fabric. Advantageously, the copy support strip has a total developed length dimensioned to support a number of reference copies corresponding to the number of different copies printed.

  by the rotary printing machine.

  The copy support strip has a width corresponding to the maximum width of the copy to be printed by the rotary printing machine. Thus, before starting the rotary printing machine, the operator easily positions the "good (s) to be printed" on the copy support strip and as the printing machine operates, it can automatically position in front of him the "good to shoot" chosen in relation to which he wishes

  examine the machine-printed copy.

  The visible part of the copy support strip does not have a large bulk, less than or equal to that of a fixed panel of the prior art (for fixing a single copy), since it has a width and a height substantially equal to the

  width and height of the reference copy.

  Said strip nevertheless makes it possible to support several reference copies, with a non-visible part extending inside the structure of the control console.

  The following description next to the drawings

  attached, given by way of nonlimiting examples, will make it clear what the invention consists of and how

it can be done.

  In the accompanying drawings: - Figure 1 is a side view of a square presentation drum according to the prior art, - Figure 2 is a front perspective view of an embodiment of the device in accordance to the invention, - Figure 3 is a side sectional view of the device of Figure 2, - Figure 4 is a side sectional view of an alternative embodiment of the device according to the invention. In Figures 2 and 3, there is shown an automatic presentation device 100 of a reference copy to a control desk 1 of a

rotary printing machine.

  According to the embodiment shown, this automatic presentation device 100 includes an endless strip 101 intended to support at least one reference copy, this copy support strip 101 extending vertically behind the examination table 5. Said strip 101 is wound by being stretched around several rollers 102, 103, 104. These rollers, here three in number, are mounted for rotation on structural parts of the desk 1. They have parallel horizontal axes of rotation and are aligned vertically. The upper roller 102 is positioned outside the console, mounted between two vertical uprights 2, 3 of the control console 1. The intermediate rollers 103 and lower 104 are placed inside the structure of the control console, so not visible from the outside, the intermediate roller 103 being placed substantially at the rear edge of the examination table 5, and the lower roller 104 is placed near the floor of said

desk 1.

  Thus, the copy support strip 101 comprises a non-visible part 10 lb, and a visible part 0 lb to the operator standing in front of the desk 1; the strip 101 stands substantially vertically between the two

  uprights 2, 3 of desk 1 behind the examination table 5.

  The exemplary support band 101 is produced here in reinforced flexible material, more particularly in reinforced plastic. The frame of said exemplary support strip 101 comprises metallic or magnetic elements allowing the fixing of the reference item (s) on said support strip by

magnetic or metallic studs.

  According to another embodiment, provision may be made for the exemplary support band to be a fabric of

metallic meshes.

  The copy support strip 101 has a total developed length dimensioned to support a number of reference copies corresponding to the number of different copies printed by the rotary printing machine. Its width corresponds to the maximum width of

  the copy printed by the rotary printing machine.

  The displacement of the exemplary support strip 101 stretched around rollers 102, 103, 104 is carried out by the rotary drive of one of the rollers, here the lower roller 104 which is motorized and which comprises a position sensor of said strip 101. The other upper 102 and intermediate 103 rollers are mounted to rotate freely on the console structure and serve

of rotary support of the band.

  Of course, according to other variants, it can be provided that the motorized drive roller is

  the upper roller or the intermediate roller.

  The rotation of the lower drive roller can be controlled manually by the operator by actuating for example a push button provided on the

control panel.

  Thus, when the operator wants to view a specific "print order", he presses the push button placed on the control console. The motor actuating the lower roller 104 then starts so that the roller enters in rotation and makes the copy support band 101 advance or retreat by a determined value identified by the position sensor provided on said

lower roller 104.

  Each press of the push button will advance or retract the copy support strip by the determined value corresponding to the length of a copy until the chosen "good to pull" comes to position itself in front of the operator in the part visible

  between the two uprights 2, 3 of the control console 1.

  Alternatively, it can be provided that the rotation of at least one drive roller, here the lower roller 104, is automatically controlled by a control system of the printing machine depending on the element of the correction machine

selected by the operator.

  In this case, when a print defect or simply doubts about the quality of a print, the operator who knows the portion of the printing machine and the function (s) likely to be corrected (s) ), calls one of these functions for the part of the printing machine in question and the control-command system will automatically generate the forward or backward movement of the copy support strip by rotating the motorized lower roller and stopping of the latter so that the corresponding "pull" is positioned in the visible part between the two uprights 2, 3 of the desk in front of the operator. According to another embodiment of the device according to the invention, shown more particularly in FIG. 4, provision may be made for the intermediate roller 103 to be slidably mounted in two horizontal slides opposite 105 by means of movable actuatable supports (not shown), so that said intermediate roller is displaceable in translation in a substantially horizontal direction between a distant position E and a close position R of the front edge 4 of the desk

  in front of which the operator stands.

  According to the embodiment shown, the intermediate roller 103 can take an intermediate position I halfway between the distant position E and the close position R. The slides 105 are formed in lateral uprights 6 rising vertically from the edges side of the examination table 5, so that the

  intermediate roller 103 moves in translation over

above the latter.

  During the forward or backward movement of the intermediate roller 103 by means of the mobile supports which slide in the slides 105, the

  intermediate roller 103 remains blocked in rotation.

  The lower roller 104 is also mounted free

  translation in two vertical slides facing each other

  screws 106 made in side panels of structure of the desk, so that the movement in horizontal translation of the intermediate roller 103 causes the displacement of the lower roller 104 in translation in a vertical direction between a close position R

  and a position E remote from the intermediate roller 103.

  Here too, it can take an intermediate position I located halfway between the distant E and close positions R. The lower roller 104 mounted in the vertical slides 106 ensures by gravity the tension of the strip

mounted around the rollers.

  In addition, as shown in FIG. 4, an additional roller 107 can be provided, mounted freely in rotation, around an axis parallel to the axes of the other rollers 102, 103, 104, and positioned inside the structure of the desk with its external surface touching the rear edge of the examination table, so that a portion of the non-visible part of the copy support strip moves parallel to the examination table when the intermediate roller 103 is positioned in close position R as shown in FIG. 4, while leaving sufficient space between the specimen support strip 101 and the examination table 5, to allow the passage of a reference specimen fixed on said strip while the printed copy is

positioned on the examination table.

  The horizontal and vertical movement movements of the intermediate 103 and lower 104 rolls respectively are concomitant and controllable from the control console by the operator. The support strip being stretched around the rollers 103, 104, the displacements of said intermediate and lower rollers make it possible to bring the visible part 0lla of the copy support strip 101, of the operator, by positioning it in an oblique direction with the

examination table.

  Thus, when the visible part of the copy support band has this oblique position, the operator can observe more finely the bottom of the reference copy located on the visible part of

the copy support strip.

  The invention is in no way limited to the embodiments described and shown, but a person skilled in the art will know how to make any variant which conforms to his spirit.

Claims (11)

  1. Device for automatic presentation (100) of a reference copy to a control console (1) of a rotary printing machine, which comprises an endless band (101) intended to support the reference copy, wound around several rollers (102, 103, 104) rotatably mounted on structural parts of the desk (1), said copy support strip (101) having a visible part (10la) to an operator standing in front of the desk ( 1), which stands substantially   vertically between two uprights (2, 3) of the desk (1).   2. Device according to claim 1, characterized in that there are provided three drive rollers (102, 103, 104) of the copy support strip (101), an upper roller (102), an intermediate roller ( 103) and a lower roller (104).   3. Device according to claim 2, characterized in that the intermediate roller (103) is movable in translation in a substantially horizontal direction between a distant position and a position close to the front edge (4) of the control console (1) in front of which stands the operator, and the lower roller (104) is movable in vertical translation, so that the visible part (10la) of the support strip (101) can be brought closer to the operator.   4. Device according to one of claims 1 to   3, characterized in that the movement of the exemplary support strip in front of the operator is carried out by a manual control of rotation drive   electrical or mechanical of at least one roller (104).   5. Device according to any one of   Claims 1 to 3, characterized in that the scrolling   of the copy support band in front of the operator is achieved by an automatic control of electrical or mechanical drive of at least one roller (104), by means of a control-command system of the printing machine depending on the machine element   to correct selected by the operator.   6. Device according to any one of   previous claims, characterized in that the   copy support strip (101) is made of material flexible army.   7. Device according to claim 6, characterized in that the armature of said exemplary support strip (101) comprises metallic or magnetic elements allowing the attachment of reference item (s) to said support strip by magnetic or metallic studs.   8. Device according to one of claims 6 or   7, characterized in that the copy support strip   (101) is made of plastic.   9. Device according to one of claims 6 or   7, characterized in that the copy support strip   is a metallic mesh fabric.   10. Device according to any one of   previous claims, characterized in that the   copy support strip (101) has a total developed length dimensioned to support a number of reference copies corresponding to the number of different copies printed by the rotary machine to be printed.   11. Device according to one of claims   previous, characterized in that the copy support strip (101) has a width corresponding to the maximum width of the copy printed by the machine rotary to print.