Support bar and roll assembly with a coreless roll and a support bar

Abstract

A support bar has a central region for a material web wound to a coreless roll and a first and a rotatable second bearing journal each projecting beyond the roll. The support bar includes a first and a second part. The first part extends throughout the roll. A first end of the first part forms the first bearing journal. A second part, formed as a rotary body that is rotatable relative to the first part has a second end that forms the second bearing journal. A second end of the first part is formed with an axial bore and a first end of the second part is latched in the axial bore within the roll.

Claims

1. A support bar, comprising: a first part and a second part; a central region for a material web wound to form a coreless roll; said first part extending throughout the roll and having a first end and a second end; said first end of said first part forming a first bearing journal disposed to project beyond the roll; said second part being a rotary body rotatably mounted relative to said first part and having a first end and a second end; said second end of said second part forming a rotatable, second bearing journal disposed to project beyond the roll; and said second end of said first part being formed with an axial bore and said first end of said second part being latched in said axial bore within the roll; and wherein said rotatable second bearing journal is provided with non-rotational surfaces.

2. The support bar according to claim 1, wherein said rotary body has an undercut configuration, and wherein at least one latching nose is provided at said first part, which at least one latching nose projects into said axial bore and engages into said undercut configuration.

3. The support bar according to claim 2, wherein at least one resilient tongue is disposed on said first part and said latching nose is provided on said at least one resilient tongue.

4. The support bar according to claim 1, wherein said axial bore is a blind bore.

5. The support bar according to claim 1, wherein said second end of said first part comprises a flange forming an abutment for defining an insertion depth of said first part.

6. The support bar according to claim 1, wherein said rotatable second bearing journal is formed with a groove, and two side surfaces of said groove form said non-rotational surfaces.

7. The support bar according to claim 1, wherein said rotatable second bearing journal is formed with a diametral leg, and two side surfaces of said diametral leg form said non-rotational surfaces.

8. The support bar according to claim 1, configured to support a coreless roll of toilet paper formed with tear-off perforations.

9. The support bar according to claim 1, configured to support a coreless roll of paper towel paper.

10. A roll assembly, comprising a corelessly wound roll of a material web and a support bar according to claim 1.

11. The roll assembly according to claim 10, wherein the material web is toilet paper formed with tear-off perforations.

12. The roll assembly according to claim 10, wherein the material web is paper towel paper.

13. A support bar, comprising: a first part and a second part; a central region for a material web wound to form a coreless roll; said first part extending throughout the roll and having a first end and a second end; said first end of said first part forming a first bearing journal disposed to project beyond the roll; said second part being a rotary body rotatably mounted relative to said first part and having a first end and a second end; said second end of said second part forming a rotatable, second bearing journal disposed to project beyond the roll; and said second end of said first part being formed with an axial bore and said first end of said second part being latched in said axial bore within the roll; wherein said rotary body has an undercut configuration, and wherein at least one latching nose is provided at said first part, which at least one latching nose projects into said axial bore and engages into said undercut configuration.

14. The support bar according to claim 13, wherein at least one resilient tongue is disposed on said first part and said latching nose is provided on said at least one resilient tongue.

15. The support bar according to claim 13, wherein said axial bore is a blind bore.

16. The support bar according to claim 13, wherein said second end of said first part comprises a flange forming an abutment for defining an insertion depth of said first part.

17. The support bar according to claim 13, wherein said rotatable second bearing journal is provided with non-rotational surfaces.

18. The support bar according to claim 17, wherein said rotatable second bearing journal is formed with a groove, and two side surfaces of said groove form said non-rotational surfaces.

19. The support bar according to claim 17, wherein said rotatable second bearing journal is formed with a diametral leg, and two side surfaces of said diametral leg form said non-rotational surfaces.

20. The support bar according to claim 13, configured to support a coreless roll of toilet paper formed with tear-off perforations.

21. The support bar according to claim 13, configured to support a coreless roll of paper towel paper.

22. A roll assembly, comprising a corelessly wound roll of a material web and a support bar according to claim 13.

23. The roll assembly according to claim 22, wherein the material web is toilet paper formed with tear-off perforations.

24. The roll assembly according to claim 22, wherein the material web is paper towel paper.

25. A support bar, comprising: a first part and a second part; a central region for a material web wound to form a coreless roll; said first part extending throughout the roll and having a first end and a second end; said first end of said first part forming a first bearing journal disposed to project beyond the roll; said second part being a rotary body rotatably mounted relative to said first part and having a first end and a second end; said second end of said second part forming a rotatable, second bearing journal disposed to project beyond the roll; and said second end of said first part being formed with an axial bore and said first end of said second part being latched in said axial bore within the roll; wherein said axial bore formed in said first part has an undercut configuration, and said rotary body is formed with at least one latching nose that engages into said undercut configuration; wherein said rotary body has at least one resilient tongue on which said at least one latching nose is provided; and wherein said rotary body is formed with a through opening which is delimited at mutually opposite sides by two resilient tongues.

26. The support bar according to claim 25, wherein said two resilient tongues together form a forked insertion end of said rotary body.

27. The support bar according to claim 25, wherein said axial bore is a blind bore.

28. The support bar according to claim 25, wherein said second end of said first part comprises a flange forming an abutment for defining an insertion depth of said first part.

29. The support bar according to claim 25, wherein said rotatable second bearing journal is provided with non-rotational surfaces.

30. The support bar according to claim 29, wherein said rotatable second bearing journal is formed with a groove, and two side surfaces of said groove form said non-rotational surfaces.

31. The support bar according to claim 29, wherein said rotatable second bearing journal is formed with a diametral leg, and two side surfaces of said diametral leg form said non-rotational surfaces.

32. The support bar according to claim 25, configured to support a coreless roll of toilet paper formed with tear-off perforations.

33. The support bar according to claim 25, configured to support a coreless roll of paper towel paper.

34. A roll assembly, comprising a corelessly wound roll of a material web and a support bar according to claim 25.

35. The roll assembly according to claim 34, wherein the material web is toilet paper formed with tear-off perforations.

36. The roll assembly according to claim 34, wherein the material web is paper towel paper.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) FIG. 1 is a perspective, exploded view of a first exemplary embodiment of a support bar according to the invention with a rotatable bearing journal;

(2) FIG. 2 is a similar view of a second exemplary embodiment of the support bar according to the invention;

(3) FIG. 3 is a similar view of a third exemplary embodiment of the support bar according to the invention;

(4) FIG. 4 shows a longitudinal section through an embodiment of a support bar without bearing journal;

(5) FIG. 5 is a view of a longitudinal section through the embodiment of the support bar of FIG. 2 with an inserted rotatable bearing journal;

(6) FIG. 6 is a view of a longitudinal section through the embodiment of FIG. 4 with two rotatable bearing journals;

(7) FIG. 7 is a plan view of the two parts of the support bar of FIG. 3; and

(8) FIG. 8 shows a diagrammatic perspective view of a dispenser for dispensing web material from a roll.

DETAILED DESCRIPTION OF THE INVENTION

(9) Referring now to the figures of the drawing in detail and first, particularly, to FIG. 1 thereof, there is shown a support bar 1 for a corelessly wound roll 3. The roll 3 is indicated in broken lines in FIGS. 4 through 6. It is, in particular, a paper roll. The support bar 1 has, as shown in FIG. 1, a narrowing portion 6 that can be axially fitted into the roll 3. Bearing journals 4, 5 are preferably provided at the ends on the axis 2 of the roll 3.

(10) The part 6 of the support bar 1 represents a core portion which in FIGS. 1, 2, 3, 5 and 7 embraces the entire length of the roll 3. In FIGS. 4 and 6 the part 6 extends over more than half the roll 3 and is in particular non-releasably latched to a second part 7 which is in the form of a sleeve and which is axially inserted from the other end. Both parts 6, 7 taper towards the respective insertion end and at the other outer end preferably have a respective flange 10, 11 which bears from the outside against the end face of the roll 3 or is slightly pressed into same. The first part 6 has an end bore 14 which is surrounded by the flange 10.

(11) Both parts 6, 7 are provided at the periphery each with between two and six longitudinal ribs 8, 9 which rise towards the flange 10, 11 and which are each of a length of maximum of 40 percent of the support bar 1. The longitudinal ribs 8, 9 extend from the ends approximately equally far into the innermost windings of the roll 3 and provide an approximately well-balanced holding action until used up, which in particular can be felt in the central region 21, as can be seen from FIG. 4, insofar as a free space remains between the innermost winding of the roll 3 and the support bar 1.

(12) As shown in FIGS. 1, 2 and 5 the insertion end of the first part 6, that faces away from the flange 10, projects beyond the roll 3, wherein that region is of the smallest diameter, and forms a cylindrical bearing journal 4 which can be provided with a bore 23 for receiving an insert, for example a perfume capsule or the like. Provided on the first part 6 at somewhat of an axial spacing from the bearing journal 4 is an annular bead 19 which has an inclined, rising surface and a latching surface disposed approximately perpendicularly to the axis 2 of the support bar 1.

(13) The second part 7 which can be pushed on to the first part 6 as shown in FIGS. 2, 5 and 6 has a bore 22 whose portion which is closer to the flange 11 is of a larger diameter than the portion extending towards the insertion end. The transition between the two bore portions forms an annular shoulder 18 at which the surface of the annular bead 19, that is perpendicular to the axis 2, latches when the second part 7 is fitted on to the first part 6.

(14) A support bar 1 whose insertion end forms a cylindrical bearing journal 4 (FIGS. 1, 2, 3) can be fitted without a second bearing journal 5 into a dispenser if the dispenser has at one side a receiving means and at the other side a mounting projection which engages into the bore 14 in the first part 6. If the dispenser has two mounting projections it is then possible to use the support bar as shown in FIG. 4 without bearing journal, which there, as described, comprises only the two parts 6, 7 which are latched together.

(15) If the dispenser 25 does not have a mounting projection but as shown in FIG. 6 is provided at both sides with guide paths 27, a support bar 1 as shown in FIG. 1 or FIG. 2 which has a bearing journal 4 is fitted with a rotary body 12 provided with a second bearing journal 5. The rotary body 12 is fitted into the bore 14 in the first part 6, in which there is provided an annular groove 15 of an undercut configuration, which is open outwardly between the longitudinal ribs 8. The rotary body 12 is provided h latching noses 17 which latch at the annular groove 15.

(16) The rotary body 12 is apertured or hollow in the region of the latching noses 17 and has at least two resilient tongues 16 which can deflect inwardly when the rotary body 12 is pushed into the bore 14 in the first part 6.

(17) In a second configuration as shown in FIG. 6, if the dispenser 25 does not have a mounting projection, it is also possible to use a support bar 1 as shown in FIG. 4, which in both parts 6, 7 has a respective end bore 14, 22. Here, a respective rotary body 12, 12 carrying a bearing journal is fitted into the two bores and rotatably latched. The rotary body 12 is of the same configuration as the rotary body 12. The bore 22 in the second part 7 has an enlarged central portion so that this forms on the one hand closer to the flange 11 the annular shoulder 15 and on the other hand the annular shoulder 18. The annular bead 19 of the first part 6 in turn latches at the annular shoulder 18 and the latching noses 17 of the rotary body 12 latch at the annular shoulder 15, the latching noses 17 in turn being provided on tongues 16 formed yieldingly by a central hollow space. As can be seen from FIG. 6 rotary bodies 12, 12 with similar or different bearing journals can be fitted into the two bores 14, 22. The rotary body 12 can also be provided with a cylindrical bearing journal 4, similarly to that shown in FIGS. 1 and 2.

(18) The support bar shown in FIGS. 3 and 7 has a peripheral groove 31 in the rotary body 12 and a mushroom-shaped knob 32 at the insertion tip each defining an undercut configuration. Latching projections 35, 36 provided at the inside of the bore 14 of the first part can latch at both elements 31, 32. Openings in the region of the bore 14 leave free in the first part 6 displaced material curved portions 37 which have the necessary elasticity for latching engagement of the rotary body 12.

(19) In matching relationship with the rotatable bearing journal 5 with a non-rotational surface, in particular a groove 20, the guide path 27 in the dispenser 25 can be of a similar configuration throughout between the insertion position 28 and the dispensing position 29, for example in the form of a leg or rib, in which case removal of the material web 26 from the dispenser 25 (FIG. 6) is possible without any problem by unrolling the support bar 1 on the rotary body 12.