Claims
- 1. A dispenser for wound rolls of flexible sheet material that have supporting spindles projecting outwardly from the roll core ends comprising:
- a dispenser housing to receive the rolls to be dispensed having inwardly facing tracks on the opposite inner side walls of said housing for the rolls to move downwardly within said tracks with the lower end section of each track slanting away from the longitudinal axis of the main length of the track,
- roll driving guide means pivotally mounted adjacent the lower end of each said track with means biasing said guide means inwardly toward the center of the track, each said guide means providing a friction surface along each slanting track section to engage the periphery of the roll spindle within the track and promote roll rotation during said downward movement of the roll,
- a feed roller rotatably mounted within said dispenser housing adjacent the lowermost ends of said tracks so that the periphery of a roll having the spindle therefor engaged by said guide means will engage and be driven by rotation of said feed roller, and
- means for leading sheet material leaving said feed roller out of said dispenser housing to a user.
- 2. A dispenser as recited in claim 1 wherein said friction surface on each said guide means is constructed from material having a high coefficient of friction to induce roll rotation when moving down said tracks.
- 3. A dispenser as recited in claim 1 wherein each said guide means is provided by a driving guide pivotally connected adjacent the bottom end of each said track with said friction surface forming the lower side of the track section slanting away from the main track length.
- 4. A dispenser as recited in claim 3 wherein the upper end of each said guide has a projection and an inclined cam area above said projection such that the roll core spindle cams said guide out from its inwardly biased position within the track upon moving down in said tracks to engage said friction surface.
- 5. A dispenser as recited in claim 1 wherein one of said tracks is provided with inwardly extending flange means along the inner face of said one track spaced from the outer wall of said one track, said flange means being disposed adjacent the upper end of said one track whereby a roll core spindle having a peripheral groove inwardly of the spindle outer end can enter said one track with the groove passing said flange means to assure that the wound roll is inserted in said dispenser housing in the proper direction.
- 6. A dispenser as recited in claim 1 wherein each said slanting track section is inclined down and away from the rotation axis of said feed roller.
- 7. A dispenser as recited in claim 6 wherein the lower side of each said slanting track section lies on a line that is generally tangent to the periphery of said feed roller.
- 8. A dispenser as recited in claim 1 wherein a pressure roller is biased into rotating engagement with said feed roller for material from a roll to drivingly pass between the nip of said rollers.
- 9. A dispenser as recited in claim 8 wherein said pressure roller has provided thereon resiliently deformable means disposed eccentric to the axis of said pressure roller to pick up the leading free end of sheet material upon a full roll engaging said rollers to carry this free end into the nip between said rollers.
- 10. A dispenser as recited in either of claims 8 or 9 wherein said pressure roller carries axially spaced conical resilient portions along the length thereof with each of said conical portions facing inwardly toward the mid-point of said pressure roll.
- 11. A dispenser for wound rolls of flexible sheet material that have supporting spindles projecting outwardly from the roll core ends comprising:
- a dispenser housing to receive the rolls to be dispensed having inwardly facing tracks on the opposite inner side walls of said housing for the rolls to move downwardly within said tracks,
- a roll driving guide means pivotally mounted adjacent the lower end of each said track with means biasing said guide means inwardly toward the center of the track, each said guide means providing a friction surface to engage the periphery of the roll spindle within the track and promote roll rotation during said downward movement of the roll,
- a feed roller rotatably mounted within said dispenser housing adjacent the lowermost ends of said tracks so that the pheriphery of a roll having the spindle thereof engaged by said guide means will engage and be driven by rotation of said feed roller, and
- means for leading sheet material leaving said feed roller out of said dispenser housing to a user.
- 12. A dispenser as recited in claim 11 in combination a roll is provided with a mandrel extending through the core of said roll with the ends of said mandrel forming spindles extending beyond said core to slideably engage in said inwardly facing tracks, said mandrel having fins extending outwardly from the perimeter of the mandrel portion fitting within said core at one end of said mandrel, one end of said roll being slotted outwardly from said core into the roll sheet material and said fins engaging in said slotted one roll end to key the mandrel and roll together against relative rotation therebetween.
- 13. A dispenser combination as recited in claim 12 wherein one end portion of said mandrel forming a spindle has a peripheral groove formed inwardly of the outer end of said one end portion, one of said tracks is provided with inwardly extending flange means along the inner face of said one track spaced from the outer wall of said one track, said flange means being disposed adjacent the upper end of said one track whereby said one end portion of said mandrel enters said one track with said peripheral groove passing said flange means to assure that the wound roll is inserted in said dispenser housing in the proper direction.
- 14. A dispenser for wound rolls of flexible sheet material comprising:
- a dispenser housing to receive the rolls to be dispensed having means for supporting a roll therein in a position for sheet material dispensing,
- a feed roller rotatably mounted within said dispenser housing adjacent the lower end of said housing for the roll to engage and be driven by said feed roller in dispensing sheet material from the roll,
- a pressure roller biased into rotating engagement with said feed roller for the sheet material to pass between the nip of said rollers, said pressure roller having resiliently deformable means disposed eccentric to the axis of said pressure roller to pick up the leading free end of sheet material upon the outer roll surface engaging said rollers to carry this free end into said nip, and
- means for leading sheet material leaving said rollers out of said dispenser housing to a user.
- 15. A dispenser as recited in claim 14 wherein said resiliently deformable means comprises at least one resiliently deformable segment secured to rotate with said pressure roller, said segment being resilient and projecting outwardly throughout a peripheral part of the pressure roller circumference.
- 16. A dispenser as recited in claim 15 wherein said segment is formed by generally radiating resilient fingers projecting generally radially outwardly of the axis of said pressure roller.
- 17. A dispenser as recited in claim 15 wherein said segment is formed by an outwardly projecting arcuate resilient wall which is eccentric to the axis of said pressure roller and provides a curved wall surface to engage and pick up the leading free end of sheet material upon the outer roll surface.
- 18. A dispenser as recited in claims 15, 16 or 17 wherein said pressure roller carries axially spaced resilient portions along the length thereof with each providing a cylindrical perimeter pressing against the feed roller surface to define the nip between said rollers.
- 19. A dispenser as recited in claim 18 wherein said axially spaced resilient portions on said pressure roller are conical in configuration with each conical portion facing inwardly toward the mid-point of said pressure roller to promote spreading out the sheet material passing through the nip of said rollers.
- 20. A dispenser as recited in claim 18 wherein said feed roller includes axially spaced cylindrical sections which engage with said pressure roller, at least two of said sections being spaced to accommodate passage therebetween of said resiliently deformable segment on said pressure roll incident rotation of said pressure roller.
- 21. A dispenser as recited in claim 18 wherein said feed roller has a serrated cutting knife pivotally mounted therewithin, said feed roller has an elongated external opening for projection of said knife therethrough, stationary cam means is mounted relative to said feed roller to cam said knife out through said opening incident rotation of said rollers to sever the sheet material, and the serrations on said knife are spaced to accommodate therebetween said resiliently deformable segment on said pressure roller.
- 22. A dispenser as recited in claim 14 wherein said resiliently deformable means comprises resiliently deformable eccentric segments spaced along said pressure roller, axially spaced conical resilient portions are spaced along the length of said pressure roller disposed on opposite sides of said eccentric segments, each said conical portion facing inwardly toward the mid-point of said pressure roller, said feed roller has a serrated cutting knife pivotally mounted therewithin with an elongated external opening in said feed roller for projection of said knife therethrough, and stationary cam means is mounted relative to said feed roller to cam said knife out through said opening incident rotation of said rollers to sever the sheet material.
- 23. A dispenser as recited in claim 22 wherein said stationary cam means is operatively positioned relative to said pivotally mounted knife to initiate camming of said knife out through said opening immediately before the nip of said rollers, and the serrations on said knife are spaced to accommodate therebetween said eccentric segments and said conical resilient portions.
- 24. A dispenser for wound rolls of flexible sheet material that have supporting spindles projecting outwardly from the roll core ends comprising:
- a dispenser housing to receive the rolls to be dispensed having inwardly facing tracks on the opposite inner sidewalls of said housing for the rolls to move downwardly within said tracks,
- movably mounted roll driving guide means positioned adjacent the lower end of each said track with means biasing said guide means inwardly toward the center of the track, each said guide means providing a friction surface to engage the periphery of the roll spindle within the track and promote roll rotation during said downward movement of the roll,
- a feed roller rotatably mounted within said dispenser housing adjacent the lowermost ends of said tracks so that the periphery of a roll having the spindle therefor engaged by said guide means will engage and be driven by rotation of said feed roller, and
- means for leading sheet material leaving said feed roller out of said dispenser housing to a user.
- 25. A dispenser for wound rolls of flexible sheet material comprising:
- a housing,
- means mounted within said housing for rotatably supporting a roll therein,
- a feed roller rotatably mounted within said housing adjacent said supporting means and arranged so that the periphery of a roll held by said supporting means will engage and be driven by said feed roller, and
- a pressure roller rotatably mounted within said housing and engaging said feed roller, said feed and pressure rollers defining a nip therebetween through which the sheet material passes, said pressure roller including means for picking up the leading free end of the sheet material on the outer surface of a full roll engaging said feed and pressure rollers to carry said free end into said nip.
- 26. A dispenser for wound rolls of flexible sheet material comprising:
- a housing,
- means mounted within said housing for rotatably supporting a roll therein,
- a feed roller rotatably mounted within said housing adjacent said supporting means and arranged so that the periphery of a roll held by said supporting means will engage and be driven by said feed roller, and
- a pressure roller rotatably mounted within said housing and engaging said feed roller, said feed and pressure rollers defining a nip therebetween through which sheet material passes, said pressure roller including means for urging the sheet material axially outwardly of said feed roller to spread the material along the surface of said feed roller as the material passes through said nip.
- 27. A dispenser as recited in claim 26 wherein said urging means comprises a plurality of resilient, spaced, substantially conical portions positioned along the length of said pressure roller with the apex end of each of said portions oriented toward the axially central, transverse mid-plane of said pressure roller and the periphery of each of said portions engaging the periphery of said feed roller.
- 28. A dispenser as recited in claim 26 wherein said pressure roller further includes means for picking up the leading free end of the sheet material on a full roll engaging said feed and pressure rollers to carry said free end into said nip.
- 29. An article of manufacture comprising:
- a roll of flexible sheet material having an internal passageway therethrough,
- a slot extending from said passageway into the roll at one end of the roll, and
- roll mounting means disposed in said passageway and having a rib extending into said slot to rotatably lock said roll and said mounting means together, said mounting means further having portions extending axially outwardly beyond the ends of the roll and adapted to be rotatably mounted in a dispenser, one of said portions having a smaller minimum transverse cross-sectional dimension than the other of said portions, whereby said one portion is adapted to be received in a similarly dimensioned dispenser supporting structure and said other portion is too large to be received in said supporting structure so that said portions can be mounted in the dispenser with the roll axially oriented in one direction only.
- 30. An article of manufacture as recited in claim 29 wherein said one portion comprises an axially inner section having said smaller minimum transverse cross-sectional dimension and an axially outer section contiguous to said inner section and having a minimum transverse cross-sectional dimension larger than said smaller dimension.
- 31. An article of manufacture as recited in claim 30 wherein said inner and outer sections have circular transverse cross-sections.
- 32. An article of manufacture as recited in claim 29 wherein said mounting means comprises a one-piece spindle extending through said passage-way.
Parent Case Info
This is a continuation of application Ser. No. 897,431 filed Apr. 18, 1978, now abandoned.
US Referenced Citations (8)
Continuations (1)
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Number |
Date |
Country |
Parent |
897431 |
Apr 1978 |
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