Automatic labeling machine, for containers in the form of mesh bags or the like

Abstract: Automatic labeling machine, for containers in the form of mesh bags or the like, which presents a carriage 18 displaceable back and forth in a support plate 19, which incorporates a central, lengthwise channel 20, two lateral connecting rods 23 and 24 being articulated in the carrige, one with an external stud and the other with a lever 25, joined together at their free ends by means of a brace 26, in which is fixed a finger 27 carrying small catches 28, which can be introduced into the channel 20 with intercalation of the corresponding part of the label to be dragged toward the discharge from the machine; and presenting a push rod 32 temporarily retaining said stud, provided with a plane 32a inclined to the inside in its free end and which can be freed by a bumper 36 joined to the corresponding connecting rod 24, and the lever 25 actuates a cutting means 16.

Description: FIELD OF THE INVENTION The present Patent of Invention refers to an automatic labelling machine for containers in the form of bags formed of mesh or the like. PRIOR TO THE INVENTION Labelling machines which supply labels in pairs such as the machines which are the object of ES-A-399558 and ES-A-408111, are already known. The known machines supply labels, in pairs, to clamping devices arranged at the outlet of machines forming product containers in the form of mesh bags or the like, which are obtained from a continuous tube of said material, generally plastics material. The labels are fed from a continuous strip, rolled up in the form of a bobbin mounted revolving in a suitable support. The cited continuous strip of labels presents two transverse cuts as lateral grooves in the strip, which penetrate into part of the width of the strip; and each pair of labels remains joined by means of a cord arranged at the side with each one of the cord's ends fastened to each one of the two labels of the corresponding pair. In said known machines, a guide means guides the cited strip that is unrolled from the bobbin, and means are also present for actuation of said strip to transfer it from the bobbin toward the outlet of the machine and means which cut each pair of labels in order to separate them from the strip, and normally regulation and control means for the good adjustment and operation of the machine. For this purpose, two clamps are applied, separated longitudinally at a certain distance from one another and having preliminarily held the cited means supplying the pair of labels in its proper position, from which the labels proceed to being cut in the separation zone between the two clamps, each label however remaining joined, by means of its cord, one in each end of the pair of bags which are thus closed, so that alternating and cyclical operations are realized while the successive containers are provided with labels, one on each side, at opposite ends. In known machines supplying labels devices are provided for printing the labels with various informational markings (relative to characteristics of the product in the container, price, etc.), at the same time as the delivery of the labels is carried out. In the already known machines it is possible to print the labels just before their delivery, that is to say, during the operation of supplying the labels, but this method requires a tampon-type device for impregnation of each strip brought up to be transferred, for application of the printing to each label, with the subsequent complications relating to such printing devices and with the risk that, as a result of a neglect of the user of the machine, the printing device is sometimes out of dye and the labels can be supplied without printing or else with defective printing. Labelling machines are also known similar to those just described, which supply the labels one by one, each label being provided with an appendix, threaded through at the same time as the body of the label, in order to fix it to a bag. The operation is carried out during manufacture of such a strip of labels, according to the conventional method used to obtain the smallest possible quantity of waste (generally by suitable arrangement of the strips, having an assembly of strips of labels obtained from a band of predetermined width and several times larger in size). The applicant has been granted Patent ES-A-554613, which refers to a labeling machine of the described type which comprises a bobbin joined to a frame and a feeder of a continuous strip of labels, the labels separated from one another by at least one transverse cut, which works based on the width of the strip, with each pair of labels being joined by means of a cord or the like, arranged laterally and with each one of the cord's two ends fastened, respectively, to each one of the two labels of each pair; and also comprising a guide means and a means for actuation of said strip, and a cutting means to separate the labels from the strip and a means of regulation and control. The machine according to ES-A-554,613 is characterized in that it presents an anti-slip surface roller, arranged transverse to the guide means of the strip of labels --which is heat-sensitive-- and situated underneath this member, to drag it toward the outlet of the machine, the referenced roller being rotated by motor-powered means and through corresponding transmission means; in that there is provided, over the rotating roller, a printer mechanism working heat selectively at predetermined and programmable points, which is applied against the surface of the strip of labels by resilient means, for which effect the printer mechanism is articulated on a transverse shaft joined to the frame; in that it presents a transverse eccentric means, which rotates actuated by the power means and through the transmission means, which eccentric means periodically produces the swivelling of the printer mechanism, thus periodically elevating it or separating it with respect to the strip of labels, which strip is adapted to be dragged by a temporary transport means, essentially during execution of the separation between each two juxtaposed labels under the active zone of the printer mechanism and presenting to said printer mechanism an element for its support over the eccentric means; and in that the temporary transport means are actuated by other eccentric drives, synchronized with those of the printer mechanism and revolving by the power means through respective transmission means, with another longitudinal support element being applied resiliently against said eccentric means, supported and prevented from slipping in the frame and articulated, by its opposite end and in closer proximity to the discharge from the machine, to a swivelling transverse support provided with as many catches as transverse cuts exist between each two labels and which can be aligned with the same, the catches also swiveling, arranged longitudinally, and able to be introduced into said cuts in the strip of labels, to cause the strip to be dragged forward periodically during the inactive phase of the printer mechanism when it is in its position separated from the referenced strip. SUMMARY OF THE INVENTION It is the object of the invention to provide an automatic labelling machine for containers in the form of mesh bags or the like, which has a great versatility in the use of different types of labels, and allows for easy adaptation, by both mechanical and electrical connection, and in particular by a compressed fluid, to the container machine to which said labelling machine is attached. This object is attained by the features of claim 1. Preferred embodiments of the invention are subject matter of the dependent claims. The invention is now further explained with reference to the accompanying drawings, in which a practical embodiment of the referenced labeling machine is represented, to be taken solely as nonlimiting example of the scope of the present invention. DESCRIPTION OF THE DRAWINGS In the drawings, Figure 1 shows a side view of the machine with a cross section through a part of the bobbin support and with part of the protective cover removed; Figure 2 corresponds to the section along A-B of Fig. 1, showing a detail of the carriage of the machine and incorporating its top part with the finger and other elements; Figure 3 corresponds to the section along C-D of Fig. 1; Figure 4 corresponds to a plan view, turned 90 degrees away from Fig. 1 and with a partial cross section through the dragging roller, with a sketch representation of the actuation motor; Figure 5 shows a raised view turned 90 degrees away from Fig. 4, in other words corresponding to a raised view of the side of the machine opposite that shown in Fig. 1 and also with part of the protective cover removed; Figure 6 corresponds to the section along E-F of Fig. 5 and shows a detail of the cutting means and of its actuation; Figure 7 represents an enlarged detailed view of the bottom part of the machine during its operation for final delivery of the already separated and printed label; and Figure 8 is a representation similar to that of Fig. 7, but showing the removal of the carriage from the machine and the movement described by the finger with small catches, joined to the carriage of the machine. DESCRIPTION OF AN EMBODIMENT OF THE INVENTION The automatic labelling machine, for containers in the form of mesh bags or the like, comprises a bobbin (not shown), which is arranged within a receptacle 1 joined to, or forming part of, a frame 2, which bobbin is constituted of a continuous strip of labels fed to the machine, which labels can present any suitable configuration (square, rectangular, curvilinear or with curved sides or combinations of curved and straight sides and, in general, any other form), and each label can also present an appendix of smaller width than that of the body of the label, so that said narrower appendix serves as linkage between the bodies of the labels. The bobbin can present a core and can be joined to receptacle 1 or to an equivalent support, with easily dismountable means so that another bobbin can be substituted. The strip of labels being fed from the bobbin is displaced lengthwise by a guide means 3 guiding said strip and preferably consisting of two plates arranged parallel and at some distance from one another, forming a flat, extended tunnel of rectangular cross section, of which the height is somewhat larger than the thickness of the strip of labels and of which the width is at least somewhat larger than the width of the strip. The bottom plate (Fig. 1) of said guide means 3 can present two longitudinally spaced openings, while the top plate will present corresponding openings or else one opening having larger dimensions covering at least the area of said two openings, so as to arrange one sensor 4 or 5 on each side for each two openings, of which the position is adjustable in accordance with the dimensions of the body of the label and, in particular in accordance with the dimensions of its appendices, to control the forward movement and the stopping of the strip of labels and the zone of the body of the strip in which the corresponding printing is intended to take place; and of which the means for regulation and control will be connected with those of the container to which they are being applied, for their coordinated operation. The labeling machine presents an actuating means to move the strip, comprising a roller 6 having an anti-slip surface (for example a covering of rubber or the like), arranged transversely to said guide means 3 and by which said strip is supported to be dragged toward the outlet of the machine. Roller 6 is rotated by a power source such as an electric motor 7, which in the shown embodiment incorporates a reduction gear, and which is operationally connected to said roller 6 through two toothed, meshing wheels 8 and 9 (Fig. 5), wheel 8 being joined to the output shaft of the reduction gear of electric motor 7 and wheel 9 being joined to roller 6 (Figs. 4 and 5). In any case, the transmission means between the power source and the aforementioned roller 6 can consist of any other conventional means used for this purpose, which can also be configured as the actuating means causing revolution of the roller by use of any other conventional power source. The labelling machine makes use of a printer mechanism 10 which in this example is of the heat selective type operating at predetermined points and is programmable, although said printer mechanism can also consist of a tampon-type device for direct impregnation of the body of each label or else of a transfer device for the application of a transfer strip on top of each label. If printer mechanism 10 operates heat-selectively as described, the labels, in other words the surfaces of the labels to be printed, must be heat-sensitive to be able to be printed by heat. In this example, printer mechanism 10 (Fig. 1) is mounted on a longitudinal bar 11 which is turnable about its axis for improved adjustment of said mechanism over the label to be printed, which is supported by roller 6. Said longitudinal bar 11 is turnably mounted in a block 12 (Figs. 1 and 4) which is pivotally mounted on transverse shaft 13 joined to frame 2. To be able to hold printer mechanism 10 against the label to be printed and to assure sufficient contact and satisfactory printing, the free end of longitudinal bar 11 is joined to one end of a spring 14, the other end of which is fastened suitably to frame 2, so that its resilient counter action, adjustable as desired, allows this effect to be attained. A prismatic block 15, for example of a plastic material and having rounded block edges, is rotatably supported on a transverse shaft fixed to frame 2. Said block 15 is shown in Fig. 1 in its rest or inactive position in which printer mechanism 10 is applied with pressure against roller 6 (with intercalation of the corresponding strip of labels) by force of the resilient action of spring 14; but if the prismatic block 15 is turned (manually) by an angle of 90° with respect to the position represented in Fig. 1, the free end of bar 11 is displaced to the left in said drawing, in other words, is pivoted counterclockwise with respect to axis 13 and, therefore, printer mechanism 10 will pivot to the right in Fig. 1, separating it from the strip of labels and the roller 6, so that the user can carry out any desired operation, such as the lacing-up of a new strip of labels. The printer mechanism 10 may be mounted to its support with means which facilitate its mounting and dismounting and therefore its substitution, and such a printer mechanism will present in particular the suitable electric connections for its actuation. Likewise, cutting means are made available to separate each label from the strip, which labels are held together in one assembly (Figs. 1, 5 and 6) so as to be cut by a movable blade 16 and a blade 17 fixed to frame 2. The actuation of said cutting means is to be described hereinafter. The labelling machine in question presents a carriage 18 (Figs. 1, 2, 5, 7 and 8) which can be moved back and forth by an actuation means along a support plate 19 (Figs. 1, 2, 4, 5, 7 and 8), which projects downwardly and is fastened to frame 2. Carriage 18 presents two side brackets 18a (Fig.2) which engage and fit tightly to the vertical edges of the support plate 19 and channels are formed in the lateral surfaces of said brackets 18a in which the vertical edges of said support plate 19 are inserted. Support plate 19 incorporates a guide means to guide the labels, consisting of a longitudinal recess 19b of depth and width calibrated to the thickness and width of the strip of labels to be used and, specifically, to facilitate the displacement and correct guiding of the leading label cut from the strip to be transferred toward the outlet of the machine to deliver it to the container machine, the feed of which by the labeling machine has just been described. The aforementioned support plate 19 moreover presents a central longitudinal channel 20 (Figs. 3 and 4) with a shaped transverse profile, in this example staggered toward the interior, and which extends into an appendix 19a extending in downward direction, likewise provided with said shaped transverse channel profile. In the bottom of support plate 19, and on its surface opposite that provided by channel 20, a bumper 21 is located to limit the downward displacement of carriage 18. A shaft 22 passes through both side brackets 18a of carriage 18 (Figs. 2 an 4) to which links 23 and 24 are fixed, one on each side, which are swivelling and are contiguous, with respect to one another and on the outside, on each one of said two side brackets 18a of the carriage 18. The end of shaft 22 adjacent to link 23 projects from said link 23 as a stud 22a and is advantageously provided with a bushing 22b (Fig.7) or the like affixed to the same, and the oposite end of said shaft 22 projects for a certain distance with respect to the other link 24 and carries a cam 25 (Figs. 2 and 5) fastened thereon. The free ends of the two links 23 and 24 are joined securely by a brace 26 (Fig. 2), to which a finger 27 is fixed which, in this example, is constituted of a small rod bent at an obtuse angle (Figs. 1, 5, 7 and 8), and said finger 27 can be of any other convenient profile, and can even be of circular configuration corresponding to the shape of a small rod. Finger 27 incorporates two small catches 28, although this number can be varied in agreement with the requirements, and therefore it will have at least one small catch, which catches 28 are susceptible of being placed face-to-face with the shaped transverse profile of central channel 20 of support plate 19 with its appendix 19a and can be introduced into said shaped profile with intercalation of the corresponding part of the label, already cut off from the strip, to be dragged toward the outlet of the machine and supplied to the container. The free end of finger 27 in the drawings forms an angle of 90° with the vertical plane of support plate 19, and said angle will be variable in agreement with the dimensions of the labels to be printed and subjected by the labeling machine to the corresponding container to which it is fed. The actuation means actuating carriage 18 are constituted in this example of a double-action pneumatic cylinder 29 (Figs. 4 and 5) which is articulated on a shaft 30 attached to frame 2; and the piston rod 31 of cylinder 29 is articulated on brace 26 (Fig. 2 and in general, Figs. 1, 5, 7 sand 8). The actuation means for the carriage 18 can involve other conventional solutions which attain the alternating or back and forth displacement of said carriage 18 and consequently of finger 27 fixed to brace 26, with a movement of said finger which is to be described hereinafter. A retaining lever 32 is articulated to frame 2 through a shaft 33 and presents a lateral notch 34 (Figs. 7 and 8 and also visible in Fig. 1), into which the stud 22a of shaft 22 close to link 23 engages, when carriage 18 is in its position of closest proximity to cutting means 16 and 17, that is, in the highest level position of its back and forth travel; and said retaining lever 32 is biased against said stud 22a by a resilient means which, in this case, consists of a spring 35 which is joined to the top end of retaining lever 32 and fixed to frame 2 (Fig. 1). Retaining lever 32 presents its free end (which is the bottom end in the drawings) in an inclined plane 32a (Figs. 1, 7 and 8), on which said stud 22a slides during part of the forward and return travel of carriage 18. Link 23 incorporates a bumper 36 (Figs. 7 and 8, and visible in Fig. 1), which is situated in a forward position (further down and toward the outlet of the machine) with respect to the stud 22a and which, when the carriage 18 is advancing toward the outlet of the machine (actuated by piston rod 31 of pneumatic cylinder 29), is pivotally displaced towards retaining lever 32, thereby overcoming the counter action of spring 35 and in this manner pivoting retaining lever 32 and liberating the stud 22a from notch 34 of said retaining lever 32. During the forward movement of carriage 18, cam 25 on shaft 22 actuates on associated transmission means which cause separation of the leading label from the strip of labels. Said transmission means, in this example, consist of a push rod 37 articulated on a shaft 38 affixed to frame 2 of the machine (Fig. 5), and the opposite end of push rod 37 presents a clamping screw 39 (Figs. 5, 6) which projects from the push rod 37 for an adjustable distance. During said forward movement of the carriage 18, the screw 39 is urged against the end of movable blade 16, which is articulated through a shaft 40 to frame 2 and is biased towards its open position by a spring 41 whose counter action can be overcome by the angular movement (toward the left, that is, in counterclockwise direction in Fig. 5) of push rod 37, at the same time actuated by cam 25. Likewise, movable blade 16 is held against fixed blade 17 by the resilient action of a spring 42. A bumper 43 is present to limit the travel, in clockwise direction in Fig. 5, of push rod 37 and, finally, to limit the maximum angle of opening of movable blade 16. A protective cover 44 can be provided over the machine, and it is important that this member comprises a fixed portion which covers the part of the machine comprising the transmission mechanisms and other mechanisms, and this portion of the cover is fastened by conventional means over the vertical wall of frame 2. Said cover also comprises a swiveling portion, joined for example by hinges or the like to the already described stationary portion and which will cover the remaining part of the machine with the printer mechanism and the transport means, among other members, to facilitate rapid opening of the swivelable portion of the cover and to permit access to the parts of the machine, whereby the user of the machine can intervene in operations for instance to correct the arrangement of the strip of labels in order to initiate the operation of the labelling machine and feed labels to the container machine. In this example, the swivelling portion is held closed by means of a magnetic clasp 45 (Figs. 1 and 6), although said clasping can also be attained by any other conventional means used for this purpose. The operation of the labelling machine is easily understood by an expert from the description and from the drawings to which reference is made, to obtain the feed of the strip of labels, the printing one by one and the cutting of each leading label from the strip of labels, with the feed of the preceding label delivered to the input of the container formed by a mesh bag or the like, being synchronized with the feed of the tube of mesh material to obtain the corresponding bag, and the pick-up and incorporation of each label thus delivered, for its integral assembly with the bag already closed and containing product. A brief description of the operation of this labelling machine, especially with reference to Figs. 1, 5, 7 and 8, is provided in summary hereinafter. Once the bobbin of the strip of labels and receptacle 1 are arranged by the user and the strip is drawn out, guided by guide means 3, said strip, fed over anti-slip roller 6 and prismatic block 15 turned in such a manner that it passes to the position shown in Fig. 1, that is to say that printer mechanism 10 is applied over the corresponding surface of the label which is to be printed (the operation of the labelling machine being synchronized with that of the corresponding container machine), electric motor 7 can be started up and, thus driven, the aforementioned roller 6 is revolved, displacing the strip of labels downward until sensors 4 and 5 actuate pneumatic cylinder 29 (Figs. 4 and 5), or the pneumatic cylinder is actuated by control of the container (in which are integrated the signals of said sensors), and its piston rod 31 is moved, being displaced downwardly producing the downward movement of carriage 18 and, consequently, the clockwise swing (Fig. 7) of link 23 and also of link 24 (this member swinging counterclockwise, as shown in Fig. 5), so that the stud 22a of shaft 22 is urged against the bottom of notch 34, at the same time finger 27 is pivoted in clockwise direction; and, continuing this downward displacement of carriage 18 by the actuation of piston rod 31, bumper 36 gets in contact with retaining lever 32, causing displacement thereof in clockwise direction (to the left in Fig. 7), until the stud 22a of shaft 22 disengages from notch 34 and is freed of the retaining action of lever 32. Thereby, finger 27 passes from its initial position I to position II. The pivotal movement of links 23 and 24 produce simultaneous revolution of shaft 22 to which they are affixed and, consequently, turning of cam 25 in counterclockwise direction, as shown in Fig. 5, which in turn pushes push rod 37 in counterclockwise direction, which urges movable blade 16 against stationary blade 17 (Figs. 5 and 6), thereby cutting the already preprinted leading label from the strip of labels; and subsequent to the displacement, carriage 18 together with finger 27 is lowered, of which the small catches 28 are applied against the label or eventually its appendix, introducing its central part into channel 20 of support plate 19 (thus adopting a channeled configuration in transverse section) and consequently traveling over the channel of its appendix 19a toward delivery of said label, position III, into the mouthpiece B of the container machine, for the fixation of said label to a bag which has already been filled with a desired product in said container machine. Figure 8 shows the pulling back of carriage 18, actuated by piston rod 31, which now moves upwardly During each return process finger 27 executes a pivotal movement in clockwise direction, passing from position III to an intermediate position such as position IV, and following the ascent of carriage 18 the stud 22a of shaft 22 comes in contact with the inclined plane 32a of retaining lever 32, displacing it in clockwise direction in Fig. 8 until said stud finally engages into notch 34, in which it remains held by virtue of the counter action of spring 35 (Fig. 1); and thus the process described for delivery of a new label into mouthpiece B can be initiated once again. It is appropriate to indicate that, during the return or rising movement of carriage 18, lever 25 is held in inactive position, as is shown in Fig. 5, whereby movable blade 16 is held open during all of this pulling back movement.

Claims: An automatic labelling machine for containers in form of bags of mesh or the like, having a bobbin of a continuous strip of labels to be fed one by one to a machine for filling said containers with products, further comprising: guide means (3) affixed in a frame (2) for guiding said strip, cutting means (16,17) to separate labels from said strip, control means and an anti-slip roller (6) driven by a power source (7) to move the strip and arranged transversely with respect to the guide means (3) and by which said strip is supported to be drawn toward the outlet of the labelling machine, a printer mechanism (10) for printing at predetermined and programmable locations when applied against the surface of the strip of labels in a zone in which the opposite surface of the strip of labels is supported by said roller (6), a carriage (18) which is arranged downstream of said roller (6) and is downwardly displaceable by virtue of actuation means (31) forth and back along a support plate (19) having a guide means (19b) to guide the strip of labels during its displacement, and a central, downwardly arranged longitudinal channel (20) having a shaped transverse profile, and further having an extension forming an appendix (19a) of the support plate (19) extending downwardly and also provided with said shaped profile, a shaft (22) passing through side portions (18a) on both sides of the carriage (18), links (23,24) being fixed to said shaft (22) on each side for co-rotation and being contiguous with respect to one another on each one of said side portions (18a), one end of said shaft (22) projecting beyond a first one (23) of said links (23,24) and forming a stud (22a), while the other end of the shaft (22) projects beyond the other link (24) and has a cam (25) affixed thereto for co-rotation with said shaft (22) to actuate the cutting means (16,17) upon forward movement of the carriage (18), a brace (26) joining the links (23,24) and having a finger (27) affixed to its middle portion, said finger (27) being provided with at least one small catch (28) to come face-to-face with the shaped profile of said channel (20) and to be inserted into said channel (20) with intercalation of a label already cut from the strip, to be drawn toward the outlet of the labelling machine, the actuation means (31) for the carriage (18) being articulated to said brace (26), a retaining lever (32) articulated to the frame (2) and provided with a lateral notch (34) into which said stud (22a) is engaged when the carriage (18) is in its position most proximate to the cutting means (16,17), said retaining lever (32) being biased against said stud (22a) by a resilient means (35) and comprising an inclined edge (32a) at its free end following a plane inclined to the inside and over which said stud (22a) is sliding during part of the forward and return travel of the carriage (18), the link (23) provided with said stud (22a) having a bumper (36) in forward position with respect to the stud (22a) which is brought into contact with the retaining lever (32) by a pivotal movement of said link (23) upon forward movement of the carriage (18) and pivotally displaces said retaining lever (32) so as to disengage the stud (22a) from said notch (34) thereby, said disengagement of the stud (22a) from said notch (34) causing a rotation of said brace (26) which makes said finger (27) to move upon the shaped profile of the appendix (19a) in order to engage a label to be delivered to a labelling point by a further downward movement of said carriage (18). An apparatus as set forth in claim 1, wherein said printer mechanism (10) is articulated on a longitudinal bar (11) pivotally mounted on a transverse shaft (13) affixed to the frame (2). An apparatus as set forth in claim 1 or 2, wherein the printer mechanism (10) is applied by resilient means (14) to the label to be printed.

Inventors: DAUDER GUARDIOLA AGUSTIN, DAUDER GUARDIOLA, AGUSTIN
Applicants: DAUMAR TALLERES, TALLERES DAUMAR S.A.
Application year: 1992
Main classification: B65C3
IPC codes: B65C9, B65C3, B65C5