Apparatus and methods for using packs of flexible tubing in packaging

• US 4,869,049 A
• Filed: 02/23/1988
• Issued: 09/26/1989
• Est. Priority Date: 03/05/1987
• Status: Expired due to Term

• Current Assignee: Melrose Products Limited
• Original Assignee: Process Improvements Limited
• Inventors: Ward, Brian, Richards, David C., Williams, Maurice S.
• Primary Examiner(s): Spruill, Robert L.
• Assistant Examiner(s): Bianca, Beth
• Application Number:
  US07/159,173
• Time in Patent Office: 581 Days
• Field of Search: 17/49, 53/370, 53/451, 53/456, 53/459, 53/469, 53/483, 53/567, 53/576, 53/577
• US Class Current: 53/459
• CPC Class Codes: B65B 9/15 the preformed tubular webs being stored on filling nozzles
• CPC Class Codes: B65F 1/062 having means for storing or dispensing spare bags
• CPC Class Codes: B65F 1/12 with devices facilitating emptying
• CPC Class Codes: B65F 2210/1675 by twisting, e.g. of a flexible tube
• CPC Class Codes: B65F 2240/132 Diapers

Abstract

A pack comprising a core and pleated tubing is used to provide a series of packages each containing a disposable object such as a baby'"'"'s nappy along the tubing as it passes over the top edges of the core and then down through the core. The core is turned by means of a lid about a cylinder to twist the flexible material at locations between the adjacent packs to seal the packs at their ends thereby providing hygienic disposal of the waste. A safely located rotatable cutter in the lid is provided for severing the flexible tubing above the top twist.

Claims

1. Apparatus for packaging a series of objects respectively in individual packages distributed along a length of flexible, non-resilient tubing providing walls of the packages, the apparatus incorporating tubular guide means formed to present a peripheral edge at one end and arranged to receive a pack of said tubing when formed into a gathered tube surrounding said tubular guide means and to enable an end of said gathered tubing to be drawn from said pack, closed to form the base of a package and then passed over said peripheral edge to extend in the reverse direction through said tubular guide means;

the apparatus being characterized by the provision of a stationary support formed to support said tubular guide means and also formed with an opening located for the passage therethrough, in a direction away from said peripheral edge, of a closed package after formation thereof within said tubular guide means and consisting of an object contained in said flexible tubing, said tubular guide means and said support being arranged for said base to be thrust in a direction towards said opening as by an object to be packaged when passed through said peripheral edge to provide a space in said flexible tubing for such object while causing further tubing to be drawn from said pack over said edge, and manually rotatable means mounted for rotation with respect to said support adjacent said edge of said tubular guide means for engaging said tubing on the side remote from said opening of an object being packaged and for twisting said tubing to complete a package and thereby provide a base if required for a further package for a further object to be inserted within said tubular guide means.

2. Apparatus according to claim 1, in which said stationary support and said tubular guide means are arranged to receive a pack of said tubing when consisting of a pleated cylinder of flexible tubing formed with circumferential pleats and mounted on a cylindrical core which at least in part constitutes said tubular guide means.

3. Apparatus according to claim 2, in which said support is formed with an axially projecting cylinder surrounding said opening and arranged for said core to be rotatable thereon, and said rotatable means are formed to be secured in relation to said core to enable said core to be rotated thereby on said projecting cylinder for twisting said tubing, and the apparatus further comprises at least one element fixed in relation to said support for inhibiting a package against axial rotation during said twisting of said tubing.

4. Apparatus according to claim 2, comprising a manually rotatable cutter mounted adjacent the said edge of said tubular guide means for severing said tubing after it has been twisted to close a package, thereby to detach that package from any further packages.

5. Apparatus according to claim 2, comprising a manually rotatable cutter incorporated in said rotatable means and rotatable relatively thereto, said cutter being positioned for severing said tubing after it has been twisted to close a package, thereby to detach that package and any further and lower such packages formed with said tubing.

6. Apparatus according to claim 5, in which said rotatable means comprises an outer ring arranged to be detachably attached to said core and said rotatable cutter comprises a coaxial disc mounted to be manually rotatable in said ring and a shrouded blade unit fixed to said disc and formed so as first to pierce the material of said tubing and then sever said tubing peripherally on rotation of said disc.

7. Apparatus according to claim 6, in which said shrouded blade unit comprises a cutter blade and a two-armed member having an outer arm fixed along the surface of said disc and an inner arm shaped to pierce the material of said tubing, said blade being fixed to present a cutting edge between said two arms.

8. Apparatus according to claim 6, in which said disc is formed at its centre of transparent material of an area sufficient to enable the tubing to be observed.

9. Apparatus according to claim 6, in which said ring is formed with an annular flange shaped with a taper for locking with respect to said peripheral edge of said core.

10. A method of packaging a series of objects respectively in individual packages distributed along a length of flexible, substantially non-resilient tubing, the method comprising the step of arranging a pack of said tubing, when formed into a gathered cylinder, around tubular guide means, drawing one end of said tubing in said gathered pack from an end of said pack, closing said end of said tubing to provide the base of a first package having said tubing as its side wall, thrusting an object to be packaged against said base to push said base into said tubular guide means thereby drawing further tubing in a reverse direction from said pack over an edge of said tubular guide means until said object has been located beyond said edge of said tubular guide means;

said method being characterized by twisting said tubing adjacent said edge of said tubular guide means by manually operating twisting means to complete a package comprising the object while holding the package being completed against axial rotation and so provide the base for a further package for a further object to be thrust into said tubular guide means.

11. A method according to claim 10, in which said gathered cylindrical pack is arranged as a pleated cylinder of tubing formed with circumferential pleats mounted on a cylindrical core at least in part constituting said tubular guide means.

12. A method according to claim 10, in which said flexible tubing used is high density polyethylene tubing.

13. A method according to claim 10, in which the objects being packaged are a baby'"'"'s disposable nappies.

14. A method according to claim 11, in which said manual twisting of said tubing is effected by means of a cap detachably mounted on said core.

15. A method according to claim 11, including operating a rotatable cutter to sever said tubing beyond the twisted portion thereof after completion of said package so as to detach said package from remaining tubing.

16. A portable waste-receiving receptacle having means for forming separable, disposable packages therein, comprising:

a housing having first and second ends and defining a container therebetween;

means on said one end defining an opening through which objects to be packaged are placed;

guide means surrounding said opening and having means for rotatably supporting a supply of flexible tubing arranged in a gathered pack so that an end of said tubing may be grasped, pulled from said pack, closed and then pushed through said opening to define a tubular sleeve within said receptacle and having an open end and a closed end, whereby objects may be inserted through said opening and into said sleeve to form a package;

means on said receptacle for holding said package against rotation;

rotatable means on said first end of said receptacle for rotating said pack of tubing and that portion of tubing leading therefrom to the package containing the objects to thereby twist the tubing and close off that portion of the tubing containing the objects, forming a discrete package; and

means for severing said tubing between the twisted portion and the pack of gathered tubing to separate the package from the remainder of the tubing, thereby forming a separate package for disposal.

17. A portable receptacle for receiving waste material, such as used disposable diapers, and sealing same in closed packages for disposal, comprising:

a housing having a first end and a second end and defining a container therebetween, said first end having an opening therethrough leading to the interior of the container;

annular support means on the first end for rotatably supporting a supply of flexible tubing arranged in a gathered annular pack so that an end of said tubing may be grasped, pulled from the pack, closed and pushed through the annular support means, thus inverting the tubing to form a flexible tubular sleeve having a closed end within the container, whereby an object such as a used disposable diaper may be placed in the tubular sleeve;

means in the container for engaging and holding the sleeve and object contained therein against rotation relative to the container;

rotatable means on said first end for engaging and rotating said pack and flexible tubing relative to the container and to the sleeve and object contained therein, whereby said tubing is twisted to close the tubing and seal the object within the sleeve, forming a discrete package; and

means for severing the tubing between the twisted portion and the pack to form a separate, sealed package for disposal.

18. A receptacle as claimed in claim 17, wherein:

the rotatable means comprises a removable cap which is rotatable on said first end of the receptacle, said cap having means engaging the tubing to rotate it when the cap is rotated.

19. A receptacle as claimed in claim 17, wherein:

the supply of flexible tubing is removable and replaceable from the support means for providing a fresh supply of tubing when the supply held on the support means is exhausted.

20. A receptacle as claimed in claim 18, wherein:

said cap has an end wall and closes the opening formed through said first end of the receptacle when the cap is in place on the receptacle.

21. A receptacle as claimed in claim 20, wherein:

said second end of said receptacle has an openable closure thereon to permit removal of packages comprising said severed tubing and objects enclosed therein.