EP0414860A1 - Schraubkappe aus kunststoffmaterial. - Google Patents
Schraubkappe aus kunststoffmaterial.Info
- Publication number
- EP0414860A1 EP0414860A1 EP90903756A EP90903756A EP0414860A1 EP 0414860 A1 EP0414860 A1 EP 0414860A1 EP 90903756 A EP90903756 A EP 90903756A EP 90903756 A EP90903756 A EP 90903756A EP 0414860 A1 EP0414860 A1 EP 0414860A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- braking element
- screw cap
- cap
- thread
- cap according
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims description 6
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000011324 bead Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/0471—Threaded or like caps or cap-like covers secured by rotation with means for positioning the cap on the container, or for limiting the movement of the cap, or for preventing accidental loosening of the cap
Definitions
- Screw cap made of plastic material
- the invention relates to a screw cap made of plastic material according to the preamble of claim 1.
- screw caps are manufactured in very large numbers by injection molding and are used to close containers of all kinds. Screw caps made of plastic material have become established particularly in the area of soft drinks. The screw caps are automatically screwed onto the filled bottles in a fast-running filling line.
- a problem with known screw caps is that they have to be screwed on with a certain torque in order to ensure a tight seal.
- the screw-on movement is usually limited by the fact that the bottle mouth is on the bottom of the cap.
- the cap will be unscrewed with too great a torque, so that it can then almost no longer be unscrewed by hand.
- Overtightening of the threads can also occur in certain cases, since the bottle mouths have large tolerance fluctuations, particularly in the case of glass bottles.
- the standstill of the screw cap can be brought about with a delay. It is particularly advantageous if the brake element has a run-up flank that runs approximately parallel to the central axis of the cap. In addition, the run-up flank can be inclined to a plane running through the central axis of the cap. The run-up flank is then designed like a ramp on which the external thread runs with increasing radial tension.
- the braking element can be integrated in the thread of the internal thread, or it can be formed separately from the thread of the internal thread.
- the braking element can also have a wall section designed as a thread flank for the internal thread. In this way, the braking element receives an additional function. This function can be expanded if the screw cap has one or more support ribs close to the cap base for holding an inserted sealing washer, and if the braking element has a wall section which runs in the plane of the support ribs. As a result, part of the sealing washer rests on the brake element.
- the multiple functions of the braking element mentioned can be achieved in a particularly simple manner in that it has the shape of a wedge in plan view, which extends over one Sector extends from at least 90 °.
- the run-up flank is arranged on the narrow side of the wedge, which must have a certain minimum width so that the thread start of the external thread always runs onto the braking element even in the event of tolerance fluctuations.
- FIG. 1 shows a cross section through a screw cap according to the invention
- FIG. 2 shows a cross section through the screw cap screwed onto a container mouth according to FIG. 1,
- FIG. 3 shows a partial cross section through the closure arrangement according to FIG. 2,
- FIG. 4 shows a development of the inner wall of the cap on a somewhat reduced scale
- 5 and 6 are plan views of modified exemplary embodiments of brake elements
- FIG. 7 shows a braking element designed as a circumferential rib
- Figure 8 shows a modified embodiment of a cap with a tear-off guarantee tape
- FIG. 9 shows a section through the plane I-I according to FIG. 8.
- a screw cap 1 which consists essentially of a cap base 2 and an adjoining, approximately cylindrical cap wall 3. in the Transition area 5 between cap base 2 and cap wall 3, the screw cap is rounded.
- the internal thread 4 is arranged, which has approximately left thread turns. These are interrupted by ventilation slots 11, which bring about a rapid reduction in pressure when the cap is unscrewed if there is excess pressure in the container.
- Support ribs 13 are arranged on the cap wall 3 close to the cap base 2 or at the transition region 5. These support ribs serve to hold a sealing washer 12 made of elastic material. As can be seen from FIG. 2, this sealing washer is pushed upwards when the cap is screwed on, whereby it lies sealingly around the mouth region.
- the brake element 15 At the threaded end 7 of the internal thread 4 there is a brake element 15 which is somewhat less deep than the flanks of the internal thread 4. As FIG. 4 shows, the brake element is designed as an elongated wedge in plan view. It is not connected to the threaded end 7, but begins immediately after a ventilation slot 11. The braking element extends over the sector from A to B over a little more than 180 °.
- the braking element has a run-up flank 16 which is inclined at an angle alpha to a plane running through the central axis of the cap, as can be seen from FIG. 3.
- the run-up flank runs parallel to the central axis, so that a radial force component in the direction of the arrow X is formed when the thread start 10 runs up.
- the braking element has a wall section 14 which is inclined at the pitch angle of the internal thread 4 and which practically fulfills the function of a thread flank.
- the braking element also has a wall section 15, which in the level of the support ribs 13 lies.
- the wall section 15 forms a continuation of the support ribs 13 on which the sealing washer 12 rests.
- the support ribs 13 are interrupted at the ventilation slots 11 in order to ensure optimum pressure reduction.
- the wedge-shaped braking element 6 shown in FIG. 4 obviously has a multiple function in that it serves as a stop for the external thread, as a thread flank and as a support shoulder for the sealing disk. This configuration is also particularly advantageous in terms of injection molding and tooling and can be easily removed from the mold.
- the braking element 6 does not necessarily have to have the wedge shape shown in the exemplary embodiment.
- the wall section 15 can easily be omitted or assume a different relative position.
- the configuration of the braking element must always be such that it is always in the area of the screw line for the external thread.
- Figures 5 and 6 show alternative configurations of brake elements.
- the radial depth can be approximately the same as in the exemplary embodiment according to FIGS. 1 to 4.
- the braking element 6 is integrally connected to the threaded end 7 of the internal thread and extends like a flag in the helix of the external thread.
- the thread start 10 of the external thread also runs frontally on the braking element 6.
- the braking element 6 is U-shaped and arranged completely separately. The lower leg could theoretically also form the continuation of the internal thread.
- the thread start 10 of the external thread does not run frontally here, but on the two flanks on the braking element.
- the braking element 6 is designed as a rib, which can extend over the entire circumference of the cap wall 3 or only over a specific sector. When screwing on, the underside 17 of the rib runs onto the beginning of the external thread 9. In contrast to the previously described, radially acting ramp flank 16, the underside 17 exerts an axial braking force.
- the rib could also serve, for example, to reinforce the transition area from the cap base 2 to the cap wall 3.
- FIGS. 8 and 9 An alternative embodiment of a screw cap according to the invention is shown in FIGS. 8 and 9.
- the screw cap 1 on the cap base 2 has an olive-shaped inner seal 21 which is pressed into the bottle mouth when screwed on.
- a guarantee tape 18 is arranged over tear-off webs, which is provided on the inside with at least one retaining element.
- a circumferential bead 19 is provided at the container mouth 8, under which the retaining element 20 engages when the cap is screwed on for the first time.
- the guarantee band is completely or partially separated from the lower edge of the cap, so that a first-time opening is indicated.
- the retaining elements having different shapes, e.g. Can have cams, tongues, beads, etc.
- the braking element 6 is now particularly advantageously arranged in such a way that its braking action begins when the cap is screwed on for the first time immediately after the retaining element 20 engages under the bead 19.
- the braking element 6 could also be arranged in such a way that the braking effect begins before the retaining element snaps into place and that when the braking process is ended, ie when the screw cap is at a standstill, the latching position has just been reached.
- the braking element consists of a rib or a thickening in the transition region 5 of the cap.
- the rib extends over an angle beta of approximately 75 °.
- the inner radius r of the rib is smaller than half the diameter d of the external thread 9.
- the thread start 10 of the external thread thus runs on the run-up flank 16, presses the rib 6 radially outwards and, due to the increased friction after a certain arc length the standstill of the screw cap.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES19898900826U ES1009616Y (es) | 1989-03-14 | 1989-03-14 | Dispositivo de tope para roscas de tapones. |
| CH184189 | 1989-05-17 | ||
| CH1841/89 | 1989-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0414860A1 true EP0414860A1 (de) | 1991-03-06 |
| EP0414860B1 EP0414860B1 (de) | 1993-09-01 |
Family
ID=25688811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90903756A Expired - Lifetime EP0414860B1 (de) | 1989-03-14 | 1990-03-09 | Schraubkappe aus kunststoffmaterial |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0414860B1 (de) |
| KR (1) | KR100197824B1 (de) |
| AT (1) | ATE93803T1 (de) |
| BR (1) | BR9005774A (de) |
| CA (1) | CA2027537A1 (de) |
| ES (1) | ES2043360T3 (de) |
| FI (1) | FI905643A7 (de) |
| WO (1) | WO1990010581A2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4126418C2 (de) * | 1991-08-09 | 2002-08-29 | Michael Hertrampf | Schraubkappe zum Verschließen einer Flasche oder dergleichen |
| EP0662427B1 (de) * | 1994-01-05 | 1999-11-10 | Ewit Ag | Maschinell aufsetzbarer Kunststoff-Schraubverschluss |
| IL112387A (en) * | 1994-02-01 | 1997-07-13 | Crown Cork Ag | Screwable closure cap with security against over- tightening |
| GB2321053A (en) * | 1997-01-08 | 1998-07-15 | Massmould Holdings | Screw cap with liner |
| EP1097877A1 (de) * | 1999-11-08 | 2001-05-09 | Crown Cork & Seal Technologies Corporation | Verschlusskappe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435978A (en) * | 1967-01-23 | 1969-04-01 | John C Wittwer | Bottle cap with interlocking threads |
| US4464316A (en) * | 1982-07-23 | 1984-08-07 | Baxter Travenol Laboratories, Inc. | Non-refillable humidifier container |
| FR2569661B1 (fr) * | 1984-09-03 | 1986-09-19 | Mayet Ets | Dispositif de bouchage a orientation definie |
| US4741447A (en) * | 1987-04-27 | 1988-05-03 | American National Can Company | Linerless cap closure |
-
1990
- 1990-03-09 EP EP90903756A patent/EP0414860B1/de not_active Expired - Lifetime
- 1990-03-09 ES ES90903756T patent/ES2043360T3/es not_active Expired - Lifetime
- 1990-03-09 KR KR1019900702457A patent/KR100197824B1/ko not_active Expired - Fee Related
- 1990-03-09 AT AT90903756T patent/ATE93803T1/de not_active IP Right Cessation
- 1990-03-09 BR BR909005774A patent/BR9005774A/pt not_active IP Right Cessation
- 1990-03-09 WO PCT/CH1990/000060 patent/WO1990010581A2/de not_active Ceased
- 1990-03-09 CA CA002027537A patent/CA2027537A1/en not_active Abandoned
- 1990-03-09 FI FI905643A patent/FI905643A7/fi not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9010581A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FI905643A0 (fi) | 1990-11-14 |
| KR100197824B1 (ko) | 1999-06-15 |
| FI905643A7 (fi) | 1990-11-14 |
| WO1990010581A3 (de) | 1990-11-29 |
| BR9005774A (pt) | 1991-08-06 |
| ATE93803T1 (de) | 1993-09-15 |
| CA2027537A1 (en) | 1990-09-15 |
| ES2043360T3 (es) | 1993-12-16 |
| EP0414860B1 (de) | 1993-09-01 |
| KR920700152A (ko) | 1992-02-19 |
| WO1990010581A2 (de) | 1990-09-20 |
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