Machine for making bundles of sheets, and transferring them to a wrapping machine

Abstract: A machine for making bundles (3) of sheets (2), in particular signatures, wrapped by means of a wrapping machine (15), including: a first pusher (7) which moves said bundles (3) in the direction (A) against a stop (10); means (17, 20) suitable to keep the bundle (3) pushed against the stop (10) when the first pusher (7) moves away from the bundle (3) to return in the rear position; and a second pusher (13) which moves the bundle (3) in the direction (B) perpendicular to the groove (16) in which the wrapper of the wrapping machine (15) arranged side by side with the machine is housed.

Description: The present invention relates to a machine for making bundles of sheets, in particular signatures, wrapped by means of a wrapping machine. Machines for making and wrapping bundles of sheets are already known, in particular it is cited the US Patent 3,579,944 that refers to an apparatus and method for banding bundles of envelopes, with the following drawbacks: the bundles are not completely guided during the movement toward the banding station, with the negative consequence that the bundle is broken up. Furthermore the structure of this machine requires a large space. The object of the present invention is to eliminate the above drawbacks and to provide a machine, for making bundles of wrapped sheets, having the following characteristics : the bundles of sheets are always kept guided, so that when the bundles are pushed towards the wrapping machine they can freely slide without tripping and therefore without breaking up; one or more parallel wrappings can be effected on each bundle by means of a single wrapping machine; the bundle is correctly positioned at the wrapping machine without interfering with the wrapper by tearing it or by sticking into the wrapper guiding groove. These characteristics are all achieved by the present invention as pointed out in the enclosed claims. The following detailed description of the machine includes three preferred but non-limiting embodiments of the machine, illustrated for merely exemplificative and non-limitative purposes, in the annexed drawings wherein: Fig.1 is a schematic side view of the machine, in an intermediate step of the operating cycle; Fig.2 is a schematic side view of the machine, in a second step of the operating cycle; Fig.3 is a schematic plan view of the machine, in the step of the operating cycle of fig.2; Fig.4 shows an enlarged detail of fig.3; Fig.5 is a second embodiment alternative to the embodiment illustrated in the preceding figures; Fig.6 is a third embodiment alternative to the preceding ones; Fig.7 is a schematic side view of the wrapping machine with the bundle in a first position; Fig.8 is a schematic side view of the wrapping machine with the bundle in the wrapping position; and Fig.9 is a plan view of the wrapping machine. The present machine generically includes means for transporting said sheets, for making subsequent bundles of sheets and for positioning said bundles at a wrapping machine. With reference to the enclosed drawings, said means are defined in the following way, as an example: said transporting means consist in a feeder 1 of the sheets 2 and similarly the means for making the bundles 3 of sheets 2 consist in a support 4 which is progressively lowered by a piston 5 as the forming bundle 6 of sheets 2 grows, until support 4, consisting in horizontal bars, goes below a first pusher 7 shaped as a rack made up of horizontal and vertical bars 8. The bars of support 4 pass through bars 8 of support 7 while lowering, whereby !he incoming sheets are laid on the upper surface of pusher 7, which during the backstroke to its rearmost position, by means of piston 9, lays down a portion of the forming bundle 6 on support 4 which progressively lowers until it reaches the plane 11 of rollers 12, prior to the shifting of bundle 3 towards stop 10 in the direction of arrow A. As it may be seen in fig.1, which is an intermediate position of the cycle, the forming bundle 6 of sheets is formed on support 4 while piston 9, through pusher 7, pushes the previously formed bundle 3 against stop 10, reaching the position of fig.2. Support 4 returns from the lower position to the upper position of fig.1 by means of the piston 5, in order to collect other sheets coming in from feeder 1 when pusher 7 moves from the position of fig.2 to the rearmost position. The means for transporting said sheets and the means suitable for making subsequent bundles of sheets could be arranged even in a manner different from the one described above and given as a mere example. A second pusher 13 is provided, which pushes each bundle 3 by means of a piston 14 in the direction of arrow B, as in fig.3, perpendicular to arrow A until it is positioned at a wrapping machine 15 arranged side by side with the machine, as shown in fig.8, in a position suitable for wrapping bundle 3 with a wrapper placed in groove 16 of the wrapping machine 15, so as to wrap the bundle with the wrapper transversely with respect to the direction of motion of said second pusher 13. Pusher 13 is stopped in multiple positions during its travel for shifting bundle 3 towards the wrapping machine 15, in order to wrap the bundle with multiple wrappers. A further characteristic of the present invention is the provision of means suitable to keep the bundle pushed against said stop 10 even when the first pusher 7 moves away from the bundle to return in the rear position suitable to move subsequently a new bundle in the position against stop 10, as shown in fig.2. In a first embodiment, said means suitable to keep the bundle of sheets against said stop 10 consist in a series of cylindrical or rounded pegs 17, vertically pushed by a piston 18 as shown in figs.3 and 4, passing through the vertical bars 8 of the first pusher 7 so as to fill the spaces therebetween and thus achieve the free sliding of bundle 3, pushed by the second pusher 13 towards the wrapping machine 15, along said pegs 17 while keeping the bundle pushed against the stop wall 10 when pusher 7 returns to its rearmost position, according to arrow C. A second embodiment of the means suitable to keep the bundle pushed against said stop 10 is illustrated in fig.5, according to which the horizontal plane 11 formed by rollers 12, on which the bundle of sheets arrives, is inclined around a pivot 19 integrally with said stop 10 so that a vertical plane 20 can be raised without interfering with the bundle of sheets which is inclined integrally with said horizontal plane 11 during its inclination. Therefore, the vertical plane 20 keeps the bundle pushed against said stop 10 when the first pusher 7 moves away from the bundle to reach its rearmost position. In this way, the vertical plane 20 and stop 10 back in the vertical position form a channel along which bundle 3 is moved by said second pusher 13, after that said roller plane 11 pivoted in 19 has regained its original horizontal position from the inclined position. A third embodiment is illustrated in fig.6, according to which a plane 20', which may be solid or bar-shaped, is raised in an inclined position by piston 18' so as to avoid interference with bundle 3. When pusher 7 is returned according to arrow C, plane 20' resumes the dotted vertical position against bundle 3, during the shifting of bundle 3 towards the wrapping machine. A further feature of the machine is the provision for a plate 21 adjacent to the wrapping machine 15 and suitable to be inclined around pivot 22, by means of a piston 23, from the horizontal position to a position high on the side of the wrapping machine 15, as shown in fig.7. In this way, when the bundle 3 of sheets 2 is pushed by said second pusher 13 towards the wrapping machine 15, the bundle can freely slide with no hindrance and climb over groove 16, in its front portion, until the bundle is in the correct position, as shown in fig.8, to be wrapped by the wrapper of said wrapping machine 15 when plate 21 is taken back to the horizontal position. The wrapping machine 15 may also be moved parallelly in different positions, so that, if required, various parallel wrappers corresponding to the different positions reached by the wrapping machine 15 can be wrapped around the bundle.

Claims: A machine for making bundles (3) of sheets (2) wrapped by means of a wrapping machine (15), including: means (1) for transporting said sheets (2); gathering means (4) suitable to make subsequent bundles (3) of said sheets (2); a horizontal plane (11) on which said bundles (3) of sheets (2) arrive from said gathering means (4); and means (13) suitable to position said bundles (3) at a wrapping machine (15) arranged at an end of said horizontal plane (11), said machine being characterized in that it includes a first pusher (7) which moves an individual bundle (3) in a first direction (A) on said horizontal plane (11) against a stop (10) and a second pusher 13 which moves said individual bundle (3) in a second direction (B) perpendicular to the first direction (A) and to the wrapper of the wrapping machine (15) until the bundle (3) is positioned at the wrapping machine (15) arranged side by side with the machine in such a way as to wrap the bundle (3) with the wrapper transversely with respect to the second direction (B) and in that it includes guiding means (17) suitable to keep the bundle (3) pushed against said stop (10) during the movement in the second direction (B) even when the first pusher (7) moves away from the bundle (3) to return in the rear position along a third direction (C) reverse to said first direction (A) and to move subsequently a new bundle (3) in a position against the stop (10). thus to achieve the free sliding of a bundle (3), pushed by the second pusher (13), along said guiding means (17) towards the wrapping machine (15) and keeping the bundle (3) pushed against the stop (10). A machine according to claim 1, characterized in that the first pusher (7) is made up of spaced vertical bars (8) and in that the means (17) suitable to keep said bundle pushed against said stop (10) consist in a series of cylindrical or rounded pegs (17) vertically passing through said bars (8) so as to fill the spaces therebetween. A machine according to claim 1, characterized in that the horizontal plane (11) on which the bundle (3) arrives can be inclined integrally with said stop (10) and in that the means suitable to keep the bundle (3) pushed against the stop (10) consist in a vertical plane (20) which can be raised in such a way that said vertical plane (20), upon raising, does not interfere with the bundle (3) of sheets (2) which is inclined integrally with said horizontal plane (11) and keeps the bundle pushed against said stop (10) when the first pusher (7) moves away from the bundle (3) to reach its rear position, and in such a way that the vertical plane (20) and the stop (10) form a channel along which the bundle (3) is moved by said second pusher (13) after that said plane (11) has regained its original horizontal position from the inclined position. A machine according to claim 1, characterized in that a plane (20') can be raised in an inclined position so as to avoid interference with the bundle (3) and can reach the vertical position when the first pusher (7) moves away from the bundle (3). A machine according to any of claims 1 to 4, characterized in that the machine is provided with a plate (21) adjacent to the wrapping machine (15) and suitable to be inclined from the horizontal position to a position high on the side of the wrapping machine (15), whereby when the bundle (3) is pushed by said second pusher (13) towards the wrapping machine (15), the bundle (3) can freely slide with no hindrance and climb over groove (16), in its front portion, until the bundle is placed in the correct position to be wrapped by the wrapper carried by said wrapping machine (15) when said plate (21) is taken back to the horizontal position. A machine according to any of claims 1 to 5, characterized in that the second pusher (13) can be stopped in multiple positions so that the bundle (3) can be wrapped with multiple wrappers. A machine according to any of claims 1 to 5, characterized in that wrapping machine (15) can be moved parallelly in different positions, so that various parallel wrappers corresponding to the different positions reached by the wrapping machine (15) can be wrapped around the bundle (3).

Inventors: PEROBELLI ALDO, PESSINA GIORGIO, PEROBELLI, ALDO, PESSINA, GIORGIO
Applicants: OMG PESSINA PEROBELLI, O.M.G. DI GIORGIO PESSINA E ALDO PEROBELLI S.N.C.
Application year: 1995
Main classification: B65B35
IPC codes: B65B27, B65H31, B65B35