Adhesive applicator device on perimetrical bands and bottom portions of shoes

Abstract: An adhesive applicator device on perimetrical edges of bottom portions of shoes comprises a first set (2a) of dispensing sectors (2) corresponding to the toe area and the side areas of a shoe, a second set (2b) of sectors (2) corresponding to the shoe arch region, hinging means (9) interposed between the dispensing sectors, actuating means (14) adapted to dispose the sectors (2) so as to make them take a plurality of continuously-varying positions, and means (15) for conveying adhesive at least to the dispensing sectors (2).

Description: The present invention relates to an adhesive-dispensing device of any king on perimetrical bands of bottom portions in shoes, comprising a plurality of dispensing sectors adapted to distribute an adhesive material and disposed consecutively after each other so as to define a dispensing strip corresponding to a perimetric band of a shoe, see EP-A-0 138 474. It is known that in making shoes, a step is provided in which perimetric bands of insoles and vamps corresponding to the toe area, the flanks and the arch junction region are to be joined by an adhesive material maintained in a liquid state by heating. For the purpose, in the traditional known art the use of adhesive applicator devices is provided which are adapted to form a dispensing strip of fixed conformation generally corresponding to a single and sole shoe pattern. As well known, shoes can vary not only as regards their longitudinal and transverse sizes, but also as regards the toe shape which can have a square, rounded or tapering configuration including a wide range of intermediate shapes and styles. Now, if the applicator device has a fixed dispensing strip, provision of a great number of such devices is required so as to cover the variety of shoe patterns, which will obviously bring about an increase in the installation costs. In order to overcome this drawback at least partly, some known techniques contemplate the use of devices equipped with dispensing strips or spreading areas having a partially variable outline, so as to conform at least partly to different shoe shapes. For example, in European Patent EP-B-0338725 an adhesive applicator device is disclosed which comprises two dispensing sectors at the toe which are articulated with each other and two leg sectors each articulated on the adjacent toe sector. This device has some limits that greatly impair practical use of same. Actually, first of all the adhesive-dispensing strip exclusively covers the toe and flank areas of a shoe and consequently does not enable adhesive to be spread at the arch junction region of the shoe itself. In addition, since only four dispensing sectors are provided which are articulated on each other by three pivot pins, limited possibilities exist of adapting them to the different shoe patterns, in particular as regards elongations occurring in shoe patterns involving tapering or pointed toe portions; as a result, availability of an important number of these devices is always necessary. Finally, due to the structure of the above device and to the fact that the dispensing sectors are such articulated that they cannot extend as far as the arch junction region, a thorough adhesive distribution is impossible along the above mentioned region defining and distinguishing a right shoe from a left shoe. Under this situation, the technical task underlying the present invention is to devise an adhesive applicator device on perimetrical bands of bottom portions in shoes capable of substantially obviating the above mentioned drawbacks. Within the scope of this technical task it is an important aim of the invention to conceive a dispensing device that not only allows distribution of adhesive material at the arch junction region of a shoe, but also is really universal, that is capable of being practically adapted to all shoe patterns. Actually, this device enables, on the one hand, the shape of the adhesive dispensing strip to be varied at the toe on passing from a square-toed shoe to a pointed shoe through all intermediate shapes and, on the other hand, it enables the same to be modified in width and length, above all in the case in which there is an increase in length from the toe to the arch region, as compared with a square-toed shoe of same size. Another important aim is to envisage a dispensing device capable of being adapted to the different shoe patterns by means of simple and quick adjusting operations to be carried out either manually or electronically. The technical task mentioned and the aims specified are substantially achieved by an adhesive applicator device on perimetrical bands and bottom portions of shoes which is characterized in that said distributing sectors comprise a first set of sectors corresponding to the toe area of a shoe and the side areas close to said toe area and a second set of sectors corresponding to the shoe arch junction region and comprising arch sectors, and in that said device comprises: hinging means interposed between the sectors of said first and second sets, actuating means active on said dispensing sectors and adapted to dispose the same at a plurality of positions capable of forming said dispensing strip into a plurality of shapes at least included between a first limit shape corresponding to a square-toed or large-toe shoe and a second limit shape corresponding to a pointed or tapering-toe shoe, and means for conveying an adhesive material at least to said dispensing sectors. The description of a preferred embodiment of an adhesive applicator device in accordance with the invention is now given hereinafter, by way of non-limiting example, with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of the dispensing device in accordance with the invention; Fig. 2 is a longitudinal side view, partly in section, of the device in reference; Fig. 3 is a bottom view of the device shown in Fig. 2, devoid of its supporting base; Figs. 4, 5 and 6 are top views of the device according to differentiated conformations and corresponding to large-, medium- and tapering-toe shoes; Fig. 7 is a plan view of an adhesive-feeding plate being part of the supporting base of the device; Fig. 8 is a plan view of a rear half-plate of the device; Figs. 9 and 10 diagrammatically show a top view and a bottom view of a lower plate-like element and an upper plate-like element intended for operatively mating with each other and being part of the adhesive-conveying means; and Fig. 11 is a plan view of the plate-like elements in Figs. 9 and 10 in a coupled position; Fig. 12 is a top view of an alternative embodiment of the device of the present invention; Fig. 13 is a longitudinal side view partly in section, of the device in Fig. 12. Referring to the drawings, the adhesive applicator device on perimetrical bands of bottom portions in shoes in accordance with the invention has been generally identified by reference numeral 1. It comprises a plurality of dispensing sectors generally denoted by 2 and each consisting of a body inside which one or more delivery cylinders 3 of known type are inserted, which cylinders are adapted to supply adhesive material when they are pressed against the surface to be cemented. The dispensing sectors 2 are disposed consecutively after each other so that, taken as a whole, they define a dispensing strip 4 identified in the drawings by the respective axis and adaptable to a perimetric band of a shoe. More particularly, the dispensing sectors 2 comprise a first set 2a of dispensing sectors corresponding to the toe area of a shoe and the side areas next to said toe area, and a second set 2b of sectors corresponding to the shoe arch junction. The first set 2a in turn comprises a pair of toe sectors 5 corresponding to the shoe toe area, a pair of intermediate sectors 6 and a pair of rear sectors 7 corresponding to the side or flank areas of said shoe. The second sector set 2b is comprised of a pair of arch sectors 8 of suitable upper profile so that they can adapt to the shoe arch junction region. Interposed between the above mentioned sectors are appropriate hinging means 9 (Fig. 4) practically enabling formation of an open and articulated chain consisting of said sectors in which the pair of arch sectors 8 defines the free ends of said chain. The hinging means 9 comprises a fixed front pivot pin 10 at which the toe sectors 5 terminate, two intermediate pivot pins 11 between the toe sectors 5 and intermediate sectors 6, two median pivot pins 12, located between the intermediate sectors and rear sectors 7, and two back pivot pins 13 included between the arch sectors 8 and rear sectors 7. Acting on the dispensing sectors 2 is actuating means 14 (Fig. 3) adapted to arrange said sectors in a plurality of positions capable of forming the dispensing strip 4 into a plurality of shapes differentiated from each other both longitudinally and transversely and in particular included between a first limit shape corresponding to a square-toed shoe (see Fig. 4) and a second limit shape, corresponding to a tapering-toe or pointed shoe (see Fig. 6). The device further comprises conveying means 15 (Fig. 2) for the adhesive material maintained in a liquid state by heating by means of resistors incorporated into a heating plate 16 defining a first portion of a supporting base 17 of the device itself. The actuating means 14 comprises first actuating means 18 (Fig. 3) adapted to move the dispensing sectors 2 in a prevailingly longitudinal direction and second actuating means 19 adapted to move at least part of said sectors in a prevailingly transverse direction. In more detail, the first actuating means 18 comprises a rear half-plate 20 movable longitudinally of the supporting base 17 for slide engagement with a pair of bar-shaped elements 21 fastened to a front half-plate 22, in turn made integral with the supporting base 17 by connecting screw means. The movable rear half-plate 20 and fixed front half-plate 22 have respective L-shaped end portions 20a and 22a (Fig. 1) disposed upon each other in a matching fit, for mutual sliding and abutment. The rear-plate 20 stroke is delimited by appropriate oblong slots 23, adapted to house socket head screws 24 inserted in the supporting base 17. The arch sectors 8 bear on the rear plate 20 and are slidably engaged therewith in a transverse direction, but restrained from moving in a longitudinal direction. This type of engagement is accomplished , for each of said sectors, by a transverse guide bar 25 (Fig. 2) integral at the upper part thereof with a corresponding arch sector 8 and housed at the lower part thereof into a transverse slide groove or seating 26 (Figs. 1 and 8) formed in the rear plate 20 itself. The toe sectors 5 slidably bear on the front half-plate 22 and are articulated on the front fixed pivot pin 10, integral with the front half-plate 22 itself. Joined to the lower part of each intermediate sector 6 is a substantially flattened adhesive-dispensing body 27 having a bearing surface also adapted to support, in addition to the respective intermediate sector 6 with which it is integral, the adjacent rear sector 7. Practically, in each side region, the adhesive-dispensing body 27 is interposed between two adjacent sectors, i. e. an intermediate sector 6 and a rear sector 7, and the front and rear half-plates on which it slidably bears. Each median pivot pin 12 is integral with the corresponding dispensing body 27 and the rear sector 7 can oscillate about this pin and slide on the dispensing body 27 itself. The latter is restrained in its movements by a downwardly-projecting guide pin fitted in a guide oblong slot 29 (Fig. 8) formed in the underlying rear half-plate 20. The longitudinal movement of the rear half-plate along the bar-shaped elements 21 is carried out by drive means 30 (Fig. 3) comprising a transverse block 31, integral with the rear ends 21a of the bar-shaped elements 21, and a longitudinal operating screw 32 to be rotated manually or, optionally, by an electric motor connected with electronic control units. The operating screw 32 terminates with a head 32a rotatably engaged with a crosspiece 33 integral with the rear half-plate 20 and axially fixed to the latter by a small plate 34. In addition, the operating screw 32 is coupled with a nut screw formed in the transverse block 31. The second actuating means 19, intended for carrying out displacements in a prevailingly transverse direction of at least part of the dispensing sectors 2 of the device comprises a transverse-displacement unit 35, as shown in the accompanying drawings, for the arch sectors 8, adapted to move these sectors close to or away from each other depending on the shoe size at the arch junction region and to orientate said sectors depending on whether the shoe being worked is a right shoe or a left shoe. Use of auxiliary transverse-displacement units, not shown in the accompanying drawings, may be also provided; they are capable of altering the distance between the median pivot pins 12 so that, practically, adjustment of the width of the adhesive-dispensing strip formed by the device is enabled substantially independently of the variations in length that the device is adapted to carry out by means of said first longitudinal-displacement actuating means 18. The transverse-displacement unit 35, active on the arch sectors 8 comprises, in addition to the transverse guide bars 25 integral with the last-mentioned sectors and the previously described related slide grooves 26, operating means 36 for moving the arch sectors 8 close to and away from each other and drive elements 37 to orientate said arch sectors so as to make them suited for a right or left shoe. The drive elements 37 in turn comprise a pair of plate-like elements 38 integral at their end with a first guide rod 39 slidable in a projection 40 (Fig. 2) joined to the rear half-plate 20. Connected to the ends of the plate-like elements 38 is said operating means 36 and more precisely a transverse operating screw 41 and a second guide rod 42. The transverse screw 41 has two opposite-hand screw threaded areas coupled with nut screws fitted in rear tail pieces 8a of the arch sectors 8, so that rotation of the screw itself may cause said sectors to move close to or away from each other. The second guide rod 42 is slidably coupled with said rear tail pieces 8a. Practically, the plate-like elements 38 and guide rods 39 and 42 constitute a slider transversely movable relative to the rear half-plate and for example operable either manually or by a fluid-actuated cylinder, or by an electronic-adjustment electric motor. The adhesive conveying means 15 comprises a plurality of channels, ducts and cavities capable of enabling distribution of adhesive material to the dispensing sectors 2 at some pivot pins between said sectors. More particularly, inflow of adhesive material from the heating plate 16 is carried out by a feeding plate 43 interposed between the heating plate 16 and front 22 and rear 20 half-plates so as to define an upper portion of the supporting base 17. The feeding plate 43 (Fig. 7) has, at a back area thereof, an inlet 44 from which two longitudinal channels 45 depart; they are formed in the thickness of the plate itself and their ends open into through holes 46, 47 passing through the front half-plate 22 too, so that they communicate both with the front fixed pin 10 which is internally pierced and with the pair of toe sectors 5. Feeding to the fixed pin 10 may take place directly from the heating plate 16. In this manner use of plate 43 can be eliminated. Since the toe sectors 5 are rotatable about the front pin 10, they are provided at the lower part thereof with an adhesive-collecting cavity of bowed conformation 48 the centre of curvature of which is at the front pin 10. For distribution of the adhesive material to the arch sectors 8 and intermediate and rear sectors, 6 and 7 respectively, the rear half-plate 20 has a rain collecting cavity 49 at the lower part thereof which extends longitudinally over a length corresponding to the longitudinal stroke of the half-plate itself. Conveying of adhesive material to the arch sectors 8 is carried out by means of auxiliary cavities 50 formed at the bottom of the transverse guide grooves 26 an, in communication with the main cavity 49. The auxiliary cavities 50, the extension of which corresponds to the stroke of the transverse displacements carried out by the arch sectors 8, are in turn in communication with hollows 51 and ducts 52 formed in the transverse guide bars 25, each integral with the respective arch sector 8. Conveying of adhesive material to the intermediate and rear sectors also departs from the main cavity 49 through a pair of main channels 53 formed in the rear half-plate 20 and diverging towards the lateral sides of said half-plate. Other conveying ducts internally formed in the pair of dispensing bodies 27 are provided in communication with the pair of main channels 53, by means of two holes 54. Due to the extension of the last-mentioned conveying ducts, they make a bridge between the rear half-plate 20 and front half-plate 22. Each dispensing body 27 comprises an upper plate-like element 55, integral with the corresponding intermediate sector 6, and a lower plate-like element 56 substantially matching with the upper plate-like element and integral therewith. The lower plate-like element 56 has a substantially longitudinal hollow 57 (Figs. 9 and 11) adapted to transfer adhesive material from the corresponding main channel 53 to a front area of the respective intermediate sector 6 and a median small channel 58 an end portion 58a of which corresponds with the median pivot pin 12. Said pin 12 is internally hollow and provided with a passageway 59 for feeding of the rear sector 7 with adhesive material. The upper plate-like element comprises a bridge cavity 60, adapted to bring the longitudinal hollow 57 into communication with the median small channel 58, as shown in Fig. 11, and a through cavity 61 coincident with the end portion 58a of the median small channel 58. Referring particularly to Figs. 12 and 13, in the device of the invention the arch sectors 8 are also provided to be adjusted and driven independently of each other, instead of being simultaneously driven in rotation by the transverse screw 41. Due to the possible independent adjustment of the two arch sectors 8, a better adaptation in the arrangement of the dispensing strip 4 at the arch junction region is enabled. Actually, since the starting point of the arch junction is varying depending on the shoe pattern and, in the same pattern, on the shoe size, if the arch sectors 8 are moved simultaneously, the cementing line at the arch junction region could be unable to conveniently follow the shoe shape or last profile. In the alternative embodiment shown in Figs. 12 and 13, each of the arch sectors 8 is divided into an upper portion 8b and a lower portion 8c. The lower portion 8c at the respective back pin 13 has a fork-shaped end 8d which is mounted on fulcrum 13; in addition the lower portion 8c is capable of sliding transversely along the transverse guide bar 25. On the left side of Fig. 12, the lower portion 8c of the arch sectors 8 has been shown in chain line, whereas on the right side thereof, shown by a chain line is the whole arch sector depicted in its maximum-retraction position in the arch region. Bearing on the lower portion 8c of each arch sector 8 is the upper portion 8b thereof which, in turn, is pivotally mounted on the back pin 13 relative to which said upper portion is free to rotate. The upper portion 8b can simultaneously move in a longitudinal direction over the lower portion 8c. The lower portion 8c of the arch sectors 8 has a driving arm 62 at the opposite end relative to the fork-shaped one 8a. Said arm 62 projects outwardly and its end 62a is slidably engaged in a longitudinal direction on a slider 63. This is due to the fact that the driving arm 62 must be in a position to slide longitudinally when the longitudinal operating screw 32 is acted upon, in order to adjust the overall length of the adhesive applicator device for passing from a tapering-toe shoe to a square-toed shoe. For displacement in a transverse direction of the arch sectors 8 drive means is provided, not shown in the figures, which acts on the part placed under the slider 63, so as to control displacement of the arch sectors 8 either individually, at the moment that a correct operating position of the device is to be determined, or simultaneously, when passage from a right shoe to a left shoe is required. By this solution elimination of the manual-adjustment transverse screw 41, plate-like elements 38 and first guide rod 39 is made possible. Operation of an adhesive applicator device described above mainly as regards structure, is as follows. In order to adapt the dispensing strip 4 to the shape of the shoe being worked, it is first of all possible to intervene on the transverse operating screw 41 and the plate-like elements 38 to define the mutual distance between the arch sectors 8 and orientation of same depending on whether a right shoe or a left shoe is being worked. When the step of intervening on the transverse displacement unit 35 has been completed, setting in rotation of the longitudinal operating screw 32 becomes possible. Said screw 32 moves the rear half-plate 20 longitudinally, which half-plate in turn causes the longitudinal displacement of the arch sectors 8. The back pivot pins 13, median and intermediate pins, 12 and 11, transmit motion from the arch sectors 8 to the other dispensing sectors connected at their end to the front fixed pin 10. During this intervention on the operating screw 32 the toe sectors 5 can rotate about the fixed pin 10 and slide on the front half-plate 22. The intermediate sectors 6 and related underlying adhesive-dispensing bodies 27 can rotate about the intermediate pins 11, partly sliding over the front half-plate 22 and partly sliding over the rear half-plate 20, depending on the displacement limits imposed by the guide slot 29 formed in the rear half-plate 20, to the guide pins 28 integral with the dispensing bodies 27. The rear sectors 7 can in turn rotate about the back pins 13 sliding over the rear half-plate 20. Thus a continuous passage from a square-toed shoe as shown in Fig. 4 to a medium-toe shoe(see Fig. 5), until a tapering-toe shoe (see Fig. 6) is made possible. The desired shape is locked by intervening on the socket head screws 24 fastening the rear half-plate 20 to the supporting base 17. When adaptation of the dispensing strip 4 to the shoe shape has been completed, one can begin the following step involving use of the device 1. The adhesive material from the heating plate 16 flows into the inlet 44 of the feeding plate 43 and is conveyed both to the longitudinal channels 45 of said feeding plate and to the main cavity 49 of the rear half-plate 20. From the longitudinal channels 45 the adhesive material is delivered to the toe sectors 5 and the front fixed pin 10. From the main cavity 49 the adhesive material is conveyed both to the arch sectors 8, through the auxiliary cavities 50 of the transverse slide grooves 26, the hollows 51 and ducts 52 of the transverse guide bars 25, and to the main channels 53 of the rear half-plate 20 itself. From the main channels 53 the adhesive flows, through passage holes 54, into the longitudinal hollows 57 of each lower plate-like element 56 and is admitted, through the bridge cavity 60 of the upper plate-like elements 55, to the intermediate sectors 6. Finally, the adhesive material by flowing through the median small channels 58 and passageways 59, reaches both the median pins 12 and rear sectors 7. The invention achieves important advantages. First of all the device in accordance with the invention enables the adhesive-dispensing strip to be adapted to any shoe shape by means of simple and quick adjustments and it can be easily interchanged with other devices of the traditional type as it has the same bulkiness as the latter. In addition, the device makes it possible to dispense glue at the arch junction region of a shoe as well, without additional interventions and operations. It is to point out that the device of the invention not only enables the dispensing strip to be efficiently elongated in the case of pointed shoes, but also makes it possible to vary the transverse distance between the arch sectors, as well as between other sectors, independently of possible variations in length, by means both of the transverse-displacement unit shown and of other displacement units that can be added with ease.

Claims: An adhesive applicator device on perimetrical bands of bottom portions in shoes, comprising a plurality of dispensing sectors (2) adapted to distribute an adhesive material and disposed consecutively after each other, so as to define a dispensing strip (4) corresponding to a perimetric band of a shoe, characterized in that said distributing sectors comprise a first set (2a) of sectors corresponding to the toe area of a shoe and the side areas close to said toe area and a second set (2b) of sectors corresponding to the shoe arch junction region and comprising arch sectors (8), and in that said device comprises: hinging means (9) interposed between the sectors of said first (2a) and second (2b) sets, actuating means (14) active on said dispensing sectors (2) and adapted to dispose the same at a plurality of positions capable of forming said dispensing strip (4) into a plurality of shapes at least included between a first limit shape corresponding to a square-toed or large-toe shoe and a second limit shape corresponding to a pointed or tapering-toe shoe, and means for conveying adhesive (15) at least to said dispensing sectors. A device according to claim 1, characterized in that said first set (2a) of dispensing sectors comprises: a pair of toe sectors (5) corresponding to the shoe toe area, a pair of intermediate sectors (6), and a pair of rear sectors (7), said intermediate (6) and rear (7) sectors corresponding to the side areas next to said toe area. A device according to claim 2, characterized in that said actuating means (14) comprises first actuating means (18) for moving said dispensing sectors (2) in a prevailingly longitudinal direction and second actuating means (19) for moving at least part of the same dispensing sectors (2) in a prevailingly transverse direction (19). A device according to claim 3, characterized in that it comprises a supporting base (17) and in that said first actuating means (18) comprises: a rear half-plate (20) movable longitudinally of said supporting base (17), adapted to support and engage said arch sector (8) in a longitudinal direction and to define a slidable support for a rear portion of said first sector set (2a), a front half-plate (22) integral with said supporting base (17) and engaging a fixed front pivot pin (10) adapted to mutually hinge said pair of toe sectors (5), said front half-plate (22) defining a slidable support for said pair of toe sectors (5) and a portion of said pair of intermediate sectors (6), and drive means (30) for said rear half-plate (20). A device according to claim 4, characterized in that it comprises bar-shaped elements (21) fastened to said front half-plate (22) and defining longitudinal slide guides for said rear plate (20), and in that said drive means (30) of the rear plate (20) are connected to rear free ends (21a) of said bar-shaped elements (21). A device according to claim 5, characterized in that said drive means of the rear half-plate (20) comprises: a transverse block (31) integral with said rear ends (21a) of said bar-shaped elements (21), and a longitudinal operating screw (32) rotatably engaged at its end with said rear half-plate (20) and coupled with a nut screw (31a) formed in said transverse block (31). A device according to claim 4, characterized in that said front half-plate (22) and rear half-plate (20) have respective L-shaped end portions (22a, 20a) disposed upon each other in a matching fit, for mutual sliding and abutment. A device according to claim 3, characterized in that said second actuating means (19) for movement in a prevailingly transverse direction of at least part of the dispensing sectors (2) comprises a unit (35) for transverse displacement of said arch sectors (8) adapted to move said sectors (8) close to and away from each other, depending on the shoe sizes at the arch junction region and to orientate said arch sectors (8) depending on whether a right or a left shoe is being worked. A device according to claim 8, characterized in that said transverse-displacement unit (35) comprises: at least one transverse guide bar (25) integral with each of said arch sectors (8), transverse slide grooves or seatings (26) for said guide bars (25) disposed in said rear half-plate (20), and operating means (36) active on said arch sectors (8). A device according to claim 4, characterized in that said adhesive-conveying means (15) comprises: a feeding plate (43) defining an upper portion of said supporting base (17) and having: an adhesive inlet (44) and longitudinal channels (45) communicating with said adhesive inlet (44) and formed in said plate (43), the ends (45a) of said channels being connected with said front fixed pivot pin (10) and said pair of toe sectors (5), a plurality of cavities formed in said rear half-plate (20) and communicating with said inlet (44) for adhesive distribution to said arch sectors (8), a pair of main channels (53) formed in said rear half-plate and communicating with said cavities for conveying adhesive to each side of the rear half-plate itself (20), and a pair of substantially flattened adhesive-dispensing bodies (27) each interposed at one of said side areas of a shoe between adjacent sectors comprising an intermediate sector (6) and a rear sector (7) and said front (22) and rear (20) half-plates, said dispensing bodies being internally provided, in communication with said main channels (53) of the rear half-plate, with adhesive-conveying ducts to respective intermediate (6) and rear (7) sectors. A device according to claim 10, characterized in that said pair of toe sectors (5), at said ends (45a) of the longitudinal channels (45) formed in the feeding plate (43), has adhesive-collecting cavities of bowed conformation (48) the centre of curvature of which is at said front fixed pivot pin (10). A device according to claim 10, characterized in that said cavities formed in said rear half plate comprise: a main cavity (49) extending longitudinally over a length corresponding to the longitudinal stroke of said rear half-plate (20), and auxiliary cavities (50) communicating with said main cavity (49) and formed in respective slide grooves (26) for the transverse guide bars (25) integral with said arch sectors (8), said guide bars (25) having hollows (51) and ducts (52) communicating with said auxiliary cavities (50). A device according to claim 12, characterized in that each of said dispensing bodies (27) comprises an upper plate-like element (55) integral with the corresponding intermediate sector (6) and a lower plate-like element (56) the shape of which substantially matches that of the upper plate-like element (55) and is integral therewith, said lower plate-like element (56) comprising: a substantially longitudinal hollow (57) adapted to transfer adhesive material from the corresponding main channel (49) of the rear half-plate (20) to a front area of the corresponding intermediate sector (6), and a median small channel having an end portion (58a) corresponding to a median and hollow pivot pin (12) interposed between said intermediate sector (6) and the adjacent rear sector (7), said median pivot pin (12) being integral with said matching upper and lower plate-like elements (55, 56) and defining an adhesive-feeding passage to said rear sector (7), and said upper plate-like element (55) comprising a bridge cavity (60) adapted to bring said longitudinal hollow (57) into communication with said median small channel (58) of the lower plate-like element (56) and feed said corresponding intermediate sector (6). A device according to claim 1, characterized in that each of said arch sectors (8) comprises a lower portion (8c) having a fork-shaped end (8d) slidably mounted on a corresponding rear pin (13) and the opposite end provided with an outwardly-directed driving arm having one end (62a) engaged in a slider (63) and an upper portion (8b) pivotally mounted on the back pin (13) and longitudinally slidable along the lower portion (8c), provision being made for independent drive means adapted to act on said slider (63) to make each of said arch sectors (8) carry out either independent or simultaneous displacements.

Inventors: CUCCHETTI CELESTINO, CUCCHETTI PIERO, CUCCHETTI, CELESTINO, CUCCHETTI, PIERO
Applicants: ORMAC SPA, ORMAC S.P.A.
Application year: 1997
Main classification: A43D25
IPC codes: A43D25