CA1060851A - Thread dispenser spool with anti-overrun means - Google Patents
Thread dispenser spool with anti-overrun meansInfo
- Publication number
- CA1060851A CA1060851A CA276,340A CA276340A CA1060851A CA 1060851 A CA1060851 A CA 1060851A CA 276340 A CA276340 A CA 276340A CA 1060851 A CA1060851 A CA 1060851A
- Authority
- CA
- Canada
- Prior art keywords
- holder
- bobbin
- thread
- post
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 241000628997 Flos Species 0.000 abstract description 7
- 241000239290 Araneae Species 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/02—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package
- B65H59/04—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating delivery of material from supply package by devices acting on package or support
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
- B65H49/38—Skips, cages, racks, or containers, adapted solely for the transport or storage of bobbins, cops, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
Landscapes
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Brushes (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
Abstract
Abstract of the Disclosure A spool of thread, such as dental floss, i ?ed in a two-part shell or holder, preferably made of ic. In one embodiment, the top of the upper shell part includes at least one finger which depends far enough to drag, with pre-determined friction, against the top of the spool.
In another embodiment, the thread or floss is wound on a bobbin having a clutch molded in its hub area. The clutch comprises a split cylinder having a generally C-shaped cross section with three equally spaced ribs running along the inter-nal length thereof. The C-shaped of the split cylinder embraces the central post and the surfaces of the three ribs provide areas for friction gripping the central post. In both embodi-ments, the friction keeps the bobbin from unwinding; however, the friction is not so great that it keeps the thread or floss from pulling smoothly and evenly from the bobbin.
In another embodiment, the thread or floss is wound on a bobbin having a clutch molded in its hub area. The clutch comprises a split cylinder having a generally C-shaped cross section with three equally spaced ribs running along the inter-nal length thereof. The C-shaped of the split cylinder embraces the central post and the surfaces of the three ribs provide areas for friction gripping the central post. In both embodi-ments, the friction keeps the bobbin from unwinding; however, the friction is not so great that it keeps the thread or floss from pulling smoothly and evenly from the bobbin.
Description
" ` 11D60~35~L
This invention relates to holders for spools of thread and more particularly to clutch mechanisms for preventing unwanted unwinding of the thread.
The term "thread" generically designates any s~itable thread, dental floss, string, twine, rope or the like.
Holders of the inventîve type provide for a removal of any selected length of thread, cuttinc~, holding the cut end of thread, and preventing the spool from unwinding. The entire package should be as small as possible for the length of thread enclosed therein.
An object of the invention is to provide a new and improved holder and packaging system for a spool of thread, with a maximum-sized spool and minimum-sized holder. Another object is to provide a holder at a minimum cost.
In Xeeping with an aspect of the invention, there is provided an article comprising hobbin means; a post for supporting said bobbin means so that said bobbin means can rotate about said post, said bobbin means having a hub;
a split cylinder mounted within the hub of the bobbin means and running parallel to the axis of said hub, said split cylinder fitting over, contacting, and draggin~ against the post with predetermined friction, which is great enough to prevent an unwanted and random unwinding of said bobbin and yet small enough to preclude any substantial oppos~tion to a desired withdrawal of thread.
In a further aspect the invention provides a thread holder comprising a two-part shell, one part of the holder shell supporting a bobbin for rota~
tion inside said holder with a minimum amount of friction between the bobbin and the holdPr, the other part of the holder shell includes a central post coaxially locate~
c -~
This invention relates to holders for spools of thread and more particularly to clutch mechanisms for preventing unwanted unwinding of the thread.
The term "thread" generically designates any s~itable thread, dental floss, string, twine, rope or the like.
Holders of the inventîve type provide for a removal of any selected length of thread, cuttinc~, holding the cut end of thread, and preventing the spool from unwinding. The entire package should be as small as possible for the length of thread enclosed therein.
An object of the invention is to provide a new and improved holder and packaging system for a spool of thread, with a maximum-sized spool and minimum-sized holder. Another object is to provide a holder at a minimum cost.
In Xeeping with an aspect of the invention, there is provided an article comprising hobbin means; a post for supporting said bobbin means so that said bobbin means can rotate about said post, said bobbin means having a hub;
a split cylinder mounted within the hub of the bobbin means and running parallel to the axis of said hub, said split cylinder fitting over, contacting, and draggin~ against the post with predetermined friction, which is great enough to prevent an unwanted and random unwinding of said bobbin and yet small enough to preclude any substantial oppos~tion to a desired withdrawal of thread.
In a further aspect the invention provides a thread holder comprising a two-part shell, one part of the holder shell supporting a bobbin for rota~
tion inside said holder with a minimum amount of friction between the bobbin and the holdPr, the other part of the holder shell includes a central post coaxially locate~
c -~
2 ~ ~
therein to enable a rotation of a bobbin mounted on said post, and bobbin means having a hub region containing a split cylinder with a C-shaped cross section, said C-shaped cross section embracing said central post, whereby friction occurs responsive to the C-shaped cylinder contacting and .
dragging with predetermined friction against the central post, the friction being great enough to prevent an unwanted and random unwinding of the bobbin of thread and yet small enough to.preclude any substantial opposition to a desired .
withdrawal of thread.
In a still further aspect the invention provides a thread holder comprising a two-part shell, one part of the holder shell inclu~ing an integral central post coaxially located therein to enable a rotation of a bobbin mounted on said post, bobbin means having a hub region containing a split cylinder with a C-shaped ~ross section, said cross section embracing said central post, and means in said cross section for contacting and dragging with predeter-mined friction against the central post, the friction beîng great enough to prevent an unwanted and random unwinding of the thread from said bobbin and yet small enough to preclude any substantial opposition to a desired withdrawal of thread.
In drawings Which illustrate embodiments of the invention:
Fig. 1 is a perspective view of the inventive thread holder;
Fig. 2 is a perspective and exploded view of one embodiment of the holder of Fig. 1 and of the spool of thread enclosed therein;
- 2a -- ~6~85~
Fig. 3 is a cross-sectional view of the lower housing pa~t taken along line 3-3 of Fig. 2;
Fig. 4 is a cross-sectional view of the upper housing part taken along line 4-4 of Fig. 2 - 2b -185~ l Fig. 5 is a cross-sectional view, similar to Fig. 3, showing an alternative lower housing par-t;
Fig. 6 is a perspective and exploded view of a second embodiment of the holder of Fig. l;
Fig. 7 is a cross-sectional vi~w of the upper housing part taken along line 7-7 of Fig. 6;
Fig. 8 is a plan view of the bobbin; and -Fig. 9 is a cross-sectional view, taken along line 9-9 of Fig. 8.
The holder comprises upper and lower, generally cylindrical, ~- holder shells or parts 10, 11. A spool 12 of thread (especially dental floss~ is enclosed within the holder, with the loose end 13 leaving through hole 14. Closure plate 15 closes the upper part 10 and has at least one semi-pierced detent 16 for cutking and anchoring -the loose end 13 of the thread.
The lower holder part 11 comprises a generally cylindrical container having an embossed or raised platform 20 with a de-pressed central section 21, forming a minimum fric~ion bearing surface.
The rim of the lower shell part flares outwardly (at 22) for telescopingly receiving the bottom of the upper part 10.
Key 25 fits into hole 14 for indexing the upper and lower parts 10, 11, when they are snapped together.
The lower edge of upper part 10 has a bead 30, a neck 31 of reduced diameter, and a gripping portion 33 of slightly larger diameter for snapping into section 22. The lower portion 11 has an internal bead 34 which snaps over the gripping portion 33. To provide resistance to separation, parts 10 and 11 may be connected by sonic welding.
In the upper interior surface of part 10, spaaed embossments (e.g., 35, 36, and 37) establish an upper stop position for the closure plate 15.
~ ~L060851 : i Depressions 40 enable the loose end 13 of the thread to be brought under semi-pierced cletents 16, 17, cut, and anchored.
Inside the top portion of the upper par-t 10 is a spider assembly 45 forming a clutch for preventing any unwanted or random unwinding o-f the spool 12 Preferably, this spider 45 is integrally molded into the housing itself, although it could also be a separate piece part.
The spider assembly 45 has three bowed arms 46, 47, 48 which support three dependent fingers 49, 50, 51 extending downwardly to bear against the top surface of the spool 12. The ends of the fingers curve gently upwardly in all directions to avoid snagging the thread as the spool turns. The friction between fingers 49, 50, 51 and the top of the spool 12 is sufficient to prevent unwanted or random rotation and unwinding of the spool 12 while enabling a quick and easy withdrawal of the thread The second embodiment of the invention lS seen in Fig. 6, which shows a centrally located post 6Q secured by means of a bulkhead 61. The central post 60 depends into the region of the housing which receives a bobbin 63 of thread or dental floss.
The bobbin 63 comprises a hub region 66 terminated at either end by flanges 68, 69. The interior of hub 66 has a split cylinder 70 having a generally C-shape cross section. Running down the length of split cylinder 70 are three longitudinal ribs 74, 75, 76, equally spaced around the internal circumference of the C-shape.
When the bobbin 63 is placed over the center post 60, the C-shaped cross section embraces the post, and the friction be-tween the bobbin and post is distributed over the rubbing surfaces of three ribs 74, 75, 76. The resulting frictional forces are suf-ficient to prevent the floss on the bobbin 63 from unwinding at random, but not so great that it cannot be pulled smoothly and evenly from the bobbin.
therein to enable a rotation of a bobbin mounted on said post, and bobbin means having a hub region containing a split cylinder with a C-shaped cross section, said C-shaped cross section embracing said central post, whereby friction occurs responsive to the C-shaped cylinder contacting and .
dragging with predetermined friction against the central post, the friction being great enough to prevent an unwanted and random unwinding of the bobbin of thread and yet small enough to.preclude any substantial opposition to a desired .
withdrawal of thread.
In a still further aspect the invention provides a thread holder comprising a two-part shell, one part of the holder shell inclu~ing an integral central post coaxially located therein to enable a rotation of a bobbin mounted on said post, bobbin means having a hub region containing a split cylinder with a C-shaped ~ross section, said cross section embracing said central post, and means in said cross section for contacting and dragging with predeter-mined friction against the central post, the friction beîng great enough to prevent an unwanted and random unwinding of the thread from said bobbin and yet small enough to preclude any substantial opposition to a desired withdrawal of thread.
In drawings Which illustrate embodiments of the invention:
Fig. 1 is a perspective view of the inventive thread holder;
Fig. 2 is a perspective and exploded view of one embodiment of the holder of Fig. 1 and of the spool of thread enclosed therein;
- 2a -- ~6~85~
Fig. 3 is a cross-sectional view of the lower housing pa~t taken along line 3-3 of Fig. 2;
Fig. 4 is a cross-sectional view of the upper housing part taken along line 4-4 of Fig. 2 - 2b -185~ l Fig. 5 is a cross-sectional view, similar to Fig. 3, showing an alternative lower housing par-t;
Fig. 6 is a perspective and exploded view of a second embodiment of the holder of Fig. l;
Fig. 7 is a cross-sectional vi~w of the upper housing part taken along line 7-7 of Fig. 6;
Fig. 8 is a plan view of the bobbin; and -Fig. 9 is a cross-sectional view, taken along line 9-9 of Fig. 8.
The holder comprises upper and lower, generally cylindrical, ~- holder shells or parts 10, 11. A spool 12 of thread (especially dental floss~ is enclosed within the holder, with the loose end 13 leaving through hole 14. Closure plate 15 closes the upper part 10 and has at least one semi-pierced detent 16 for cutking and anchoring -the loose end 13 of the thread.
The lower holder part 11 comprises a generally cylindrical container having an embossed or raised platform 20 with a de-pressed central section 21, forming a minimum fric~ion bearing surface.
The rim of the lower shell part flares outwardly (at 22) for telescopingly receiving the bottom of the upper part 10.
Key 25 fits into hole 14 for indexing the upper and lower parts 10, 11, when they are snapped together.
The lower edge of upper part 10 has a bead 30, a neck 31 of reduced diameter, and a gripping portion 33 of slightly larger diameter for snapping into section 22. The lower portion 11 has an internal bead 34 which snaps over the gripping portion 33. To provide resistance to separation, parts 10 and 11 may be connected by sonic welding.
In the upper interior surface of part 10, spaaed embossments (e.g., 35, 36, and 37) establish an upper stop position for the closure plate 15.
~ ~L060851 : i Depressions 40 enable the loose end 13 of the thread to be brought under semi-pierced cletents 16, 17, cut, and anchored.
Inside the top portion of the upper par-t 10 is a spider assembly 45 forming a clutch for preventing any unwanted or random unwinding o-f the spool 12 Preferably, this spider 45 is integrally molded into the housing itself, although it could also be a separate piece part.
The spider assembly 45 has three bowed arms 46, 47, 48 which support three dependent fingers 49, 50, 51 extending downwardly to bear against the top surface of the spool 12. The ends of the fingers curve gently upwardly in all directions to avoid snagging the thread as the spool turns. The friction between fingers 49, 50, 51 and the top of the spool 12 is sufficient to prevent unwanted or random rotation and unwinding of the spool 12 while enabling a quick and easy withdrawal of the thread The second embodiment of the invention lS seen in Fig. 6, which shows a centrally located post 6Q secured by means of a bulkhead 61. The central post 60 depends into the region of the housing which receives a bobbin 63 of thread or dental floss.
The bobbin 63 comprises a hub region 66 terminated at either end by flanges 68, 69. The interior of hub 66 has a split cylinder 70 having a generally C-shape cross section. Running down the length of split cylinder 70 are three longitudinal ribs 74, 75, 76, equally spaced around the internal circumference of the C-shape.
When the bobbin 63 is placed over the center post 60, the C-shaped cross section embraces the post, and the friction be-tween the bobbin and post is distributed over the rubbing surfaces of three ribs 74, 75, 76. The resulting frictional forces are suf-ficient to prevent the floss on the bobbin 63 from unwinding at random, but not so great that it cannot be pulled smoothly and evenly from the bobbin.
Claims (13)
1. A thread holder comprising a two-part shell, one part of the holder shell supporting a bobbin for rota-tion inside said holder with a minimum amount of friction between the bobbin and the holder, the other part of the holder shell includes a central post coaxially located therein to enable a rotation of a bobbin mounted on said post, and bobbin means having a hub region containing a split cylinder with a C-shaped cross section, said C-shaped cross section embracing said central post, whereby friction occurs responsive to the C-shaped cylinder contacting and dragging with predetermined friction against the central post, the friction being great enough to prevent an unwanted and random unwinding of the bobbin of thread and yet small enough to preclude any substantial opposition to a desired withdrawal of thread.
2. The holder of claim 1 wherein each of said parts comprises a generally cylindrical container, said containers being joined together at their open ends.
3. The holder of claim 1 wherein said C-shaped cross section includes a plurality of longitudinally extend-ing ribs for gripping said central post.
4. The holder of claim 3 wherein there are three of said longitudinal ribs spaced at equidistances around said C-shaped cross section.
5. A thread holder comprising a two-part shell, one part of the holder shell including an integral central post coaxially located therein to enable a rotation of a bobbin mounted on said post, bobbin means having a hub region containing a split cylinder with a C-shaped cross section, said cross section embracing said central post, and means in said cross section for contacting and dragging with predeter-mined friction against the central post, the friction being great enough to prevent an unwanted and random unwinding of the thread from said bobbin and yet small enough to preclude any substantial opposition to a desired withdrawal of thread.
6. The holder of claim 5 wherein said C-shaped cross section includes a plurality of longitudinally extend-ing ribs for gripping said central post.
7. The holder of claim 6 wherein each of said holder parts comprises a generally cylindrical container, said containers snapping together at their open ends, and said post depends from a closed end of one of said parts.
8. The holder of claim 7 wherein the rim of one part flares outwardly to form a cylindrical section and the rim of the other part telescopingly fits into said cylindrical section, and an opening formed in the rim of at least one of said parts to enable the thread to pass out of said holder at a point where said sections fit together.
9. The holder of claim 6 wherein there are three of said longitudinal ribs spaced at equidistances around said C-shaped cross section.
10. An article comprising bobbin means; a post for supporting said bobbin means so that said bobbin means can rotate about said post, said bobbin means having a hub;
a split cylinder mounted within the hub of the bobbin means and running parallel to the axis of said hub, said split cylinder fitting over, contacting, and dragging against the post with predetermined friction, which is great enough to prevent an unwanted and random unwinding of said bobbin and yet small enough to preclude any substantial opposition to a desired withdrawal of thread.
a split cylinder mounted within the hub of the bobbin means and running parallel to the axis of said hub, said split cylinder fitting over, contacting, and dragging against the post with predetermined friction, which is great enough to prevent an unwanted and random unwinding of said bobbin and yet small enough to preclude any substantial opposition to a desired withdrawal of thread.
11. The article of claim 10 wherein said post is enclosed within a holder and said post depends coaxially from one end of said holder.
12. The article of claim 10 wherein said split cylinder internally includes a plurality of longitudinally extending ribs for gripping said central post.
13. The article of claim 12 wherein there are three of said longitudinal ribs spaced equidistantly around the internal cross section of said split cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA312,269A CA1074268A (en) | 1976-04-19 | 1978-09-28 | Thread storage and dispensing system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/678,138 US4073419A (en) | 1976-04-19 | 1976-04-19 | Thread storage and dispensing system |
| US05/743,693 US4050648A (en) | 1976-11-22 | 1976-11-22 | Thread storage and dispensing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060851A true CA1060851A (en) | 1979-08-21 |
Family
ID=27101965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,340A Expired CA1060851A (en) | 1976-04-19 | 1977-04-18 | Thread dispenser spool with anti-overrun means |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS52128435A (en) |
| CA (1) | CA1060851A (en) |
| SE (2) | SE7704332L (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3612427A (en) * | 1970-03-02 | 1971-10-12 | Conolon Corp | Filament dispenser |
-
1977
- 1977-04-15 SE SE7704332A patent/SE7704332L/en unknown
- 1977-04-18 CA CA276,340A patent/CA1060851A/en not_active Expired
- 1977-04-19 JP JP4416677A patent/JPS52128435A/en active Pending
-
1984
- 1984-11-07 SE SE8405584A patent/SE464979B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE7704332L (en) | 1977-10-20 |
| SE464979B (en) | 1991-07-08 |
| JPS52128435A (en) | 1977-10-27 |
| SE8405584D0 (en) | 1984-11-07 |
| SE8405584L (en) | 1984-11-07 |
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