FR2507540A1 - PRINTING DEVICE INCORPORATED IN A MACHINE INTENDED FOR THE MANUFACTURE OF CIGARETTES - Google Patents

Abstract

ACCORDING TO THE INVENTION, EACH PRINTING GROUP 5, 6 ESTABLISHED TO COOPERATE WITH A STRIP OF PAPER 2, INCLUDES A PAIR OF ROLLS 11, 21, 12, 22 ROTATING IN REVERSE DIRECTION AND TANGENT WITH RESPECT TO THE OTHER . ONE OF THE SAID ROLLS 11, 12, CALLED PRINTER ROLLER, IS IN COMMUNICATION THROUGH ITS PERIPHERY, WITH INK DISTRIBUTOR MEANS. THE OTHER ROLLER, CALLED COUNTER-SUPPORT ROLLER, IS CARRIED BY A MOBILE SUPPORT 27, 28. CONTROL MEANS 37 INTERCEPTED BY CONTROL MEANS 39 ESTABLISHED TO CHECK THE INTEGRITY OF BAND 2 ARE KINEMATICALLY CONNECTED WITH THE SUPPORT MOBILE 27, 28 TO CAUSE THE SEPARATION OF THE ROLLS OF EACH PAIR, IN THE EVENT OF A BAND BREAKAGE. THE INVENTION MAY BE USED IN THE CASE OF PRINTING GROUPS CALLED "BRONZE".

Description

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  The present invention relates to the manufacture of cigarettes and in particular an incorporated printing device

to the production machine.

  It is known to write on the cigarettes printed information on the support strip, by means of a device

part of the production machine.

  This device executes the printing operation by means of printing rollers equipped with matrices reproducing the word to be printed. Each printing roll corresponding to one of the colors appearing on the mention or figurine to be obtained, is coupled with a roll of contrast placed on the other side of

the band.

  In the event of accidental breakage of the said strip, to a point

  located upstream of 3 said pairs of rollers, the machine for

  The cigarettes are stopped immediately but the counter-support rollers are brought into contact with the printing rolls.

  corresponding, and because of this, are stained by the ink of impres-

  It is therefore necessary to clean these wheels manually.

  before re-starting.

  The present invention aims to obviate these drawbacks.

  vantages. This device comprises at least one pair of rolls with a printer roll and a counter-roll which are

  tangents relative to each other, and means of appeal and

  stretching of the paper strip for its passage between the two rollers; said device is characterized according to the invention, in

  at least one of the rollers is mounted on

  bile, while control means slaved to means for controlling the integrity of said band, allow the displacement

  movable supports to cause the spacing of the rollers.

  To secure the object of the invention, without however the

  limit, in the attached drawing where the single figure represents

  in front view, an embodiment of the device according to the invention. The printing device (1) incorporated in a cigarette making machine comprises a paper web (2) which is

  guided by a return roller (3) rotatably mounted on a horizontal axis

zontal (4).

  Following the roll (3), the band (2) is successively

  terminally opposite two printing groups designated by (5) and (6), with an intermediate passage of that band which is

  guided by a return roller (7) placed between the two said groups

  Print weight and rotatably mounted on an axis (8) parallel to the axis (4). At the output of the device (1), the strip (2) is urged by a pair of drive rollers (9) and (10) driven by

an engine not shown.

  Printing groups (5) and (6) are established to

  respectively feeding the strip (2) according to the different colors and each comprise a printing roll (11), (12), supported and

  driven by an axis (13), (14) parallel to the axis (4)

  the water printer carries on its periphery spaced matrices (15),

  (16), reproducing the characters or drawings to be printed.

  During the rotation of the rollers (11) and (12), the matrices

  these (15), (16) come into contact on the periphery of the inking rollers (17), (18) which are supported and respectively driven

  by horizontal axes (19) and (20).

  The peripheral surface of each roller (17) and (18) is coated with a thin layer of ink continuously distributed by

  Inker means not shown and of known type.

  The strip (2) is kept in contact with the rollers (11) and (12) by counter-support rollers (21) and (22) mounted to rotate freely on axes (23) and (24) parallel to the axes

(13) and (14).

  The axes (23) and (24) are supported by free arms (25) and (26) of the squared levers (27) and (28) pivotally mounted on axes or pivots (29) and (30) parallel to the axes (13) and

  (14) and supported by the frame of the machine.

  The opposing arms (31) (32) of the levers (27) and (28) are connected via rod S (33) and (34) to a bar

  horizontal (35) The intermediate part of this bar is

  armature (36) of an electromagnet (37) operating in trac-

  which is supported by the frame of the machine.

  The electromagnet (37) acts in traction in a direction

  and its excitation is caused by an amplifier

  (38) connected to a control system established to verify the

  grit of the band (2), this control device being designated together, by (39). The control device (39) placed along the path of the web (2), upstream of the printing device (1), is in the form of 2 -

_ _ _ 2507540

  purely indicative, of the electro-optical type with essentially a photoemitter (40) and a photosensitive member (41) being

  face, located on both sides of the band (2).

  The photosensitive element (41) is connected to the amplifier (38) so as to be intercepted by the light radiation

  emitted by the element (40), during the breaking of the strip (2).

  This photosensitive element causes the excitation of the electro -

  magnet (37) via said amplifier (38).

  The excitation of the electromagnet (37) causes the rise of the bar (35) and, consequently, the pivoting of the levers (27) and (28) around their bearing points (29) and (30). ) This pivoting has the effect of causing the instantaneous spacing of the counter-support rollers (21) and (22) with respect to the printing rolls (11)

  and (12), to prevent said rollers (21) and (22) from being

  abutted by the ink coating the printing rolls.

  It is obvious that many variants can

  to be made without departing from the scope of the invention.

  By way of example, the printing units can be of a variable number and be connected to one or more means of printing.

  control coupled with the control device (39).

  Likewise, these control means may be of a type different from that described. Pneumatic or hydraulic cylinders may indeed be provided to cause the counter-support rollers to move, either directly or by

  through mechanical sytems of a different type of

indicated to him.

  Moreover, the possibility offered by the invention of separating the counter-support rollers from the printing rollers can be applied in the groups called "bronzers" and intended

  to print on the strip (2) marks with a metallic appearance

  than. In this type of printing, the dies apply on the strip (2) lines of glue reproducing the characters to

  to print, as a result of which metal powder is adhered to

  very thin, with said lines of glue.

  It is obvious that in this case, the separation of the backing roll with respect to the printing roll, caused by the breaking of the band (2), is intended to prevent said backing roll from being stained by glue-deposited on the roll

printer.

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  It should also be noted that the means described in the illustrated example, for separating the counter-support rollers from the printing rollers, can be used inversely, ie, to cause, in the event of breakage of the web ( 2), the separation of the printing rolls with respect to the counter-support rollers which are then fixed in position. The invention is in no way limited to that of these modes of application, nor to those of the embodiments of these embodiments. various parts having been specially indicated; she

  on the contrary, embraces all variants.

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Claims (6)

CLAIM $   -1 Printing device incorporated in a machine des-   for making cigarettes, comprising at least one pair of rollers (11, 21; 12, 22) consisting of an im-   primeur (11; 12) and a backing roll (21; 22) dis-   facing each other, and means (9, 10) for feeding a strip (2) of cigarette paper to pass between the two rollers, said device being characterized in that at least one of said rollers (21; 22) is mounted on movable supports (27, 28) with displacement (37) and control means (39) for checking the continuity of the strip (2) and acting to provoke   separating the rollers (11, 21; 12, 22).   -2 Device according to claim 1, characterized in that the movable supports comprise a squared lever (27; 28) supported by a fixed axis (29; 30) and whose end of an arm (25; 26) supports one of the rollers (22; 23) while   the other arm (31, 32) is connected to the moving means (37).   -3 Device according to claims 1 or 2, characterized   rised by the fact that the moving means comprise at least an electromagnet (37).   -4 Device according to claims 1 or 2, characterized   rised by the fact that the moving means comprise at least a pneumatic cylinder.   -5 Device according to claims 1 or 2, characterized   rised by the fact that the moving means comprise at least a hydraulic cylinder.   -6 Device according to claim 1, characterized in that the control and control means (39) are of the electro-optical type.   -7 Device according to claim 1, characterized in that the printing roll (11, 12) is in communication with   by its periphery, with ink dispensing means. 6 2507540   -8 Device according to claim 1, characterized in that the printing roll (11, 12) is in communication with   by its periphery, with glue dispensing means.