Packaging machine former

Abstract

A former assembly (10) for a packaging machine. The assembly (10) includes a frame (11) including a frame member (12) of U-shaped configuration. The frame (11) supports a former (17) having a former surface (18) over which stripped bag materials passes to be formed into a tubular configuration.

Claims

1. A former assembly for a packaging machine, the assembly comprising: a frame configured to be fixed relative to the packaging machine so that the assembly delivers tubular bag material to the packaging machine; a former mounted on the frame, the former being configured to receive strip bag material and reconfigure the strip material into the tubular bag material into which product to be packed is delivered, the former comprising a former surface configured for the strip material to pass over the former surface to thereby be reconfigured, the former surface converging upwardly to a former opening; and a product delivery chute extending downwardly to adjacent the opening and configured for product to be delivered to the interior of the tubular bag material via the product delivery chute; wherein the former includes a tubular portion extending down from the former opening, with the tubular portion receiving the tubular bag material, and the frame comprises an elongated frame member having a central elongated base having opposite end portions, and an arm extending from each end portion with the former being supported by the arms, and a support member extending inwards from each arm to the tubular portion to support the former, wherein said elongated frame member is hollow to thereby provide for the delivery of a gas to the interior of the tubular bag material through the elongated frame member.

2. The former assembly of claim 1, wherein said elongated frame member is U-shaped in plan view so as to provide said base and arms.

3. The former assembly of claim 2, wherein each arm extends from the base so as to terminate at an end extremity spaced from the base, with the former at least partly supported adjacent the end extremities.

4. The former assembly of claim 3, wherein said former has a lower periphery, with at least a portion of the periphery being bent, which periphery portion extends between the end extremities.

5. The former assembly of claim 4, wherein said frame includes an upwardly extending chute support having a lower portion attached to the base and an upper portion attached to said product delivery chute.

6. The former assembly of claim 5, wherein said chute support is formed of tubular material.

7. The former assembly of claim 2, further comprising a gas coupling disposed on at least one of the arms, wherein the gas coupling is configured to provide the gas to the frame member.

8. The former assembly of claim 1, wherein each arm extends from the base so as to terminate at an end extremity spaced from the base, with the former at least partly supported adjacent the end extremities.

9. The former assembly of claim 8, wherein said former has a lower periphery, with at least a portion of the periphery being bent, which periphery portion extends between the end extremities.

10. The former assembly of claim 1, wherein said frame includes an upwardly extending chute support having a lower portion attached to the base and an upper portion attached to said product delivery chute.

11. The former assembly of claim 10, wherein said chute support is formed of tubular material.

12. The former assembly of claim 1, wherein said surface has a plurality of ridges radiating outwardly and downwardly from said opening.

13. The former assembly of claim 1, wherein said former has an annular edge of arcuate transverse cross-section surrounding said opening and from which said surface diverges downwardly.

14. The former assembly of claim 13, wherein said edge is a bead.

15. The former assembly of claim 1, wherein said surface has a plurality of ridges projecting from said surface and radiating outwardly and downwardly from said opening.

16. The former assembly of claim 15, wherein said former has an annular edge of arcuate transverse cross-section surrounding said opening and from which said surface diverges downwardly.

17. The former assembly of claim 16, wherein said edge is a bead.

18. The former assembly of claim 1, wherein the frame member is tubular.

19. The former assembly of claim 1, further comprising a gas coupling disposed on at least one of the arms, wherein the gas coupling is configured to provide the gas to the frame member.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) A preferred form of the present invention will now be described by way of example with reference to the accompanying drawings wherein:

(2) FIG. 1 is a schematic isometric view of a former assembly for a packaging machine;

(3) FIG. 2 is a schematic vertical sectioned isometric view of the assembly of FIG. 1; and

(4) FIG. 3 is a schematic isometric enlarged view of portion of the assembly of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(5) In the attached drawings there is schematically depicted a former assembly 10 for a packaging machine, such as that described in U.S. Pat. Nos. 5,622,032, 7,159,376 and 4,753,336.

(6) The former assembly 10 includes a frame 11 including a first frame member 12 that is of a U-shaped configuration so as to have a base 13 from which there extends diverging arms 14. As best seen in FIG. 1, the frame member 12 is horizontally oriented so that the arms 14 extend horizontally from the base 13. The frame member 12 is tubular in construction so as to have a longitudinally extending passage to which a gas may be delivered.

(7) The frame 11 further includes transverse support members 16 fixed to end portions 15 of the arms 14, the member 16 extending inwardly.

(8) Supported by the frame 11 is a former 17 having a former surface 18 over which strip bag material passes to be formed into a tubular configuration. The surface 18 generally surrounds an upright axis 19 and converges upwardly towards the axis 19 to form an annular former opening 20 surrounding the axis 19 passes. Extending toward the opening 20 is a product delivery tubular chute 21 having an interior 22 to which product is delivered for delivery to the interior of the tubular bag material from which bags of product are formed.

(9) The opening 20 is located at the lower end the chute 21 so that bag material engaged with and moving upwardly over the surface 18 is allowed to be redirected downwardly through the opening 20 to then extend in the direction 34 to the packaging machine below.

(10) The surface 18 extends upwardly and terminates at the opening 20 with an annular bead 23 adjacent the opening 20. The bead 23 is in the form of an arcuate edge. A tubular portion 24 of the former 17 extends downwardly from the bead 23. The tubular bag material slides downwardly inside the tubular portion 24 of the chute 21 for delivery to the packaging machine below.

(11) The former 17 is supported by the members 16 by being fixed to the tubular portion 24 of the former 17.

(12) The frame 11 further includes a central mounting 25 fixed to the base 13 so as to extend upwardly therefrom. Fixed to the mounting 25 is an upwardly extending support 26 fixed at its upper end to the product delivery chute 21 to support the chute 21. The chute 21 may also be attached to the mounting 25 so as to be further supported thereby.

(13) The former 17 has a peripheral transverse length 31 that is folded so as to aid in increasing the rigidity of the former 17. This transverse length 31 is secured to a transverse member 27 fixed to the end portions 15. A roller 28 is located adjacent to but spaced from the transverse portion 26 to aid in the delivery of the sheet bag material to the surface 18. The former 17 is therefore supported by the arms 14.

(14) One or both of the arms 15 is provided with a coupling 29 via which a gas can be delivered to the interior of the member 12. As the member 12 is of a tubular construction, the gas can be delivered to the mounting portion 25 from where it is delivered to a backing member 30 (extending from the tubular portion 24) for delivery of gas to the interior of the tubular bag material. If so required, the member 26 may also be tubular for the delivery of a gas to the interior of the product delivery chute 21.

(15) The surface 18 has ridges 32 radiating outwards and downwards from the opening 20 and projecting from the surface 18.

(16) The tubular portion 24 has a recess 33 that provides access to the film when the film is initially being fed into the tubular portion 24.