EP0232856B1 - Container - Google Patents
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- Publication number
- EP0232856B1 EP0232856B1 EP19870101544 EP87101544A EP0232856B1 EP 0232856 B1 EP0232856 B1 EP 0232856B1 EP 19870101544 EP19870101544 EP 19870101544 EP 87101544 A EP87101544 A EP 87101544A EP 0232856 B1 EP0232856 B1 EP 0232856B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- container
- main body
- cap member
- terminal end
- 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 - Lifetime
Links
Images
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
- This invention relates to a container of the type in that a neck portion of a container main body is threadedly engaged with a cap member, and more particularly to a container, in which the threaded engagement between the container main body and the cap member is prevented from becoming loose.
- An arrangement of the threaded engagement between the container main body and the cap member is described in the preamble of Claim 1, which arrangement is also known from prior art FR-A-1 399 727.
- Japanese utility model publication no. 56-42187 Japanese utility model publication no. 56-48057
- Japanese utility model publication no. 57-9239 Japanese utility model publication no. 59-42342
- Japanese utility model early laid-open publication no. 55-145459 Japanese utility model early laid-open publication no. 57-88750.
- Japanese utility model publication no. 56-42187 discloses a loosening prevention device in which a number of projections for pressing the terminal end portion of a female screw are vertically spacedly arranged on a lower edge of the terminal end portion of a male screw.
- Japanese utility model publication No. 56-48057 discloses a loosening prevention device in which a male screw is built up at its terminal end portion along its upper edge and spaces between adjacent screw threads are formed gradually narrower.
- Japanese utility model publication No. 57-9239 descloses a loosening prevention device in which a screw thread having a lead angle 0 o at the terminal end portion of a male screw, and this screw thread is made higher than other screw threads.
- Japanese utility model publication No. 59-42342 discloses a loosening prevention device in which a step portion is provided at the terminal end portion of a screw thread, which continuously extends in such a manner as to fill root threads between screw threads.
- Japanese utility model early laid-open publication No.55-145459 discloses a loosening prevention device in which the width of a screw thread is formed large at a terminal end portion of a male screw, a screw groove between adjacent screw threads is formed narrow.
- Japanese utility model early laid-open publication No.57-88750 discloses a manual-operated spray container in which a check knob is formed on a thread line of a male screw.
- the projections are readily worn or broken due to a number of repeated opening and closing operations and a loosening is readily taken place due to shock.
- a container having a container main body formed with a male screw on a neck portion of said container main body, and a cap member formed with a female screw is in threaded engagement with said male screw on said neck portion such that the width of a screw groove is small at the end of a screwing operation causing a pressure flank and a clearance flank of the male and female screws to be contacted to each other under pressure, characterized in that the screw groove of the male screw becomes gradually smaller at a decreasing rate as it goes toward the terminal end direction of the screw and both the male and female screw are of a buttress thread.
- Fig. 1 through 5 illustrate one embodiment of the present invention.
- 1 denotes a container main body and 2 denotes a cap member.
- the container main body 1 is formed around a neck portion 3 with a male screw 4.
- the cap member 2 is formed at its inner surface with a female screw 5 for threadedly engaging with the male screw 4.
- Both the male and female screws 4 and 5 are of buttress threads.
- the female screw 5, like common female screws, is formed as such that the width of thread ridge, the width of the screw groove and the pitch of the screws are constant.
- the male screw 4 is formed as such that the widths A1, A2 of the screw grooves become gradually smaller as it goes toward the terminal end direction of the screw (A1 > A2) and not only pressure flanks 6, 7 of the male and female screws 4, 5 but also clearance flanks 8, 9 are contacted under pressure at a portion where the width of the screw groove is small when the threading engagement between the male and female screws is almost finished. Since the male screw 4 is formed as such that the configuration of the thread ridge is constant but, as described in the foregoing, the width of the screw groove becomes gradually smaller as it goes toward the terminal end direction of the screw, the pitch of the thread becomes gradually smaller as it goes toward the terminal end direction of the screw.
- 10 denotes a neck ring (rachet structure for preventing a loosening to occur) provided at the outer peripheral portion of a basic portion (lower end portion) of the neck portion 3 of the container main body 1.
- 11 denotes an inner ring (rachet structure for preventing a loosening to occur) provided at the inner peripheral portion of a lower end portion of the cap member 2 in such a manner as to correspond to the neck ring 10.
- 12 denotes a contact ring provided on the ceiling portion of the cap member 2 in such a manner as to be vertically hung down from the ceiling portion and adapted to ensure a sealing between the cap member 2 and the container main body 1.
- 13 denotes a projection vertically formed on the outer peripheral portion of the cap member 2 and adapted to serve for threadedly engaging the cap member 2 with the container main body 1.
- the screwing operation can be easily started just as same as the case with the conventional one since the starting end portion of the male screw 4 on the container main body 1 and the starting end portion of the female screw 5 are formed same as the conventional male and female screws.
- the width of the screw groove of the male screw 4 of the container main body 1 is formed in such a manner as to become gradually smaller as it goes toward the terminal end portion, while the female screw 5 of the cap member 2 is not formed as such as mentioned but formed same as that of a usual female screw.
- the space between the clearance flank 9 at the starting end portion of the female screw 5 and the clearance flank 8 of the male screw 4 becomes gradually narrower, and the clearance flanks 8, 9 of the male and female screws 4, 5 are also caused to be contacted under pressure at the end of the screwing operation as the pressure flanks 6, 7 are. Finally, these are completely contacted under pressure as shown in Fig. 5, thereby to prevent an occurrence of a loosening of the cap member 2 from the container main body 1 with sure. And, simultaneously with the contact under pressure, the contact ring 12 of the cap member 2 is surely contacted under pressure with the top portion of the neck portion of the container main body 1, and the neck ring 10 of the container main body 1 is brought to be engagement with the inner ring 11 of the cap member 2. Accordingly, the sealing between the container main body 1 and the cap member 2 can be further ensured and a occurrence of the loosening of the cap member 2 from the container main body 1 can be more surely prevented.
- the container main body 1 and the cap member 2 are preferably molded of a thermoplastic synthetic resin material having somewhat elasticity such as polypropylene, polyethylene, etc.
- the materials of the container main body 1 and the cap member 2 are not limited to the above.
- the container main body 1 and the cap member 2 are molded of such thermoplastic synthetic resin material because the width of the screw groove at the terminal end portion of the male screw 4 is made smaller than the width of the thread ridge at the terminal end portion of the female screw 5 (the space between the clearance flanks 8, 9 is set minus at the terminal end portions of the male and female screws 4, 5) and the fastening can be achieved in the wider range than the prior art, thereby to more effectively prevent at occurrence of the loosening of the cap member caused by shock.
- Figs. 6 and 7 illustrate another embodiment of the present invention.
- the container of this embodiment has the same sturucture as that of the container shown in Figs. 1 through 5 except that the configuration of the male screw 4 of the container main body 1 is modified and that the neck ring 10 and inner ring 11 are not provided. More specifically, the male screw 4 of this embodiment is formed as such that, as with the embodiment of Figs. 1 through 5, the widths A1, A2 of the screw grooves are formed in such a manner as to become gradually smaller (A1 > A2) as it goes toward the terminal end portions of the screws. In order to obtain such screw grooves as mentioned, contrary to the embodiment of Figs.
- the pitch B1 of the clearance flank is made smaller than the pitch B2 of the pressure flank (B2 > B1) and the widths C1, C2, C3 of the thread ridges are formed in such a manner as to become gradually larger (C1 ⁇ C2 ⁇ C3) as it goes toward the terminal end portion of the screws.
- the dotted line of Fig. 6 shows thee conventional, commonly-used male screw 4.
- Fig. 8 illustrates a further embodiment of the present invention.
- the container of this embodiment is formed as such that the terminal end portion of the thread ridge of the male screw 4 of the container main body 1 of the embodiment shown in Figs. 1 through 5 is provided with step portions 14, 14 which are disposed in symmetric relation with respect to the central axis os the male screw 4 and continuously extending by partly filling the space between the screw threads (making the screw groove portion thick in wall), and at the end of the screwing operation, the thread ridge of a female screw (not shown) of the cap member is brought to be contacted under pressure with the step portions 14, 14, thereby to more effectively prevent an occurrence of the loosening of the cap member from the container main body 1.
- Fig. 9 illustrates a still further embodiment of the present invention.
- the container of this embodiment is formed as such that the terminal end portion of the thread ridge of the male screw 4 of the container main body 1 according to the embodiment of Figs. 6 and 7 are vertically spacedly provided at its lower and upper edges with a number of projections 15, 15... and at the end of the screwing operation, the thread ridge of a female screw (not shown) of the cap member is brought to be in point-contact with the projections 15, 15..., thereby to more effectively prevent an occurrence of the loosening of the cap member from the container main body 1.
- Fig. 10 illustrates a yet further embodiment of the present invention.
- the container according to this embodiment is formed as such that a trigger type sprayer 16 is detachably threadedly engaged with the container main body 1 through the cap member 2.
- a trigger type sprayer 16 is detachably threadedly engaged with the container main body 1 through the cap member 2.
- vibrations are readily taken place when the trigger type sprayer is operated and the cap member 2 is tended to be loosened.
- the width of the screw groove is formed in such a manner as to become gradually smaller as it goes toward the terminal end portion of the screw in this embodiment same as the case with the afore-mentioned embodiments, the cap member 2 is not loosened.
- the present invention is not limited to these embodiments.
- the widths of the screw grooves of both the male and female screws may be formed in such a manner as to become gradually smaller as it goes toward the terminal end portions of the screws.
- the embodiment of Figs. 1 through 5 may be provided with the projections 15, 15, 15 of Fig. 9, or otherwise the embodiment of Figs. 6 and 7 may be provided with the step portions 14, 14 of Fig. 8.
- the male and female screws 4, 5 may be formed of multiple thread screws.
- the container according to the present invention is constructed as such that the screws as a whole are gradually brought to be contacted under pressure according to advancement of the screwing operation. Accordingly, the container main body and cap member can be surely sealed.
- the container main body and cap member are formed of a thermoplastic synthetic resin material having somewhat elasticity. Accordingly, the fastening can be achieved in the wider range than the prior art utilizing elastic deformation of screw, thereby to prevent an occurrence of the loosening of the cap member caused by shock.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16231/86U | 1986-02-06 | ||
JP1986016231U JPH0426342Y2 (pt) | 1986-02-06 | 1986-02-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0232856A2 EP0232856A2 (en) | 1987-08-19 |
EP0232856A3 EP0232856A3 (en) | 1988-05-04 |
EP0232856B1 true EP0232856B1 (en) | 1992-05-06 |
Family
ID=11910775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870101544 Expired - Lifetime EP0232856B1 (en) | 1986-02-06 | 1987-02-05 | Container |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0232856B1 (pt) |
JP (1) | JPH0426342Y2 (pt) |
DE (1) | DE3778722D1 (pt) |
ES (1) | ES2031078T3 (pt) |
HK (1) | HK75995A (pt) |
PH (1) | PH25709A (pt) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2633903B1 (fr) * | 1988-07-08 | 1990-10-12 | Bouchons Plastiques | Systeme d'obturation combinant une capsule a vis et le goulot filete d'un recipient |
US5165559A (en) * | 1990-02-01 | 1992-11-24 | Owens-Illinois Closure Inc. | Child resistant closure and package |
JP2819071B2 (ja) * | 1990-12-17 | 1998-10-30 | オーエンス−イリノイ・クロージヤ・インコーポレーテツド | 包装具 |
US6854614B2 (en) | 1999-11-05 | 2005-02-15 | Rexam Medical Packaging, Inc. | Closure having an improved thread design |
JP2005289499A (ja) * | 2004-04-05 | 2005-10-20 | Toyo Seikan Kaisha Ltd | 容器の封鎖構造 |
JP5315098B2 (ja) * | 2009-03-11 | 2013-10-16 | 株式会社フレッシュ | ボトルセット |
CN102815447B (zh) * | 2012-09-06 | 2016-01-20 | 湖南乐福地医药包材科技有限公司 | 饮料包装 |
CN102795393B (zh) * | 2012-09-06 | 2015-10-21 | 湖南乐福地医药包材科技有限公司 | 瓶盖及具有该瓶盖的饮料包装 |
JP2021155107A (ja) * | 2020-03-30 | 2021-10-07 | 日本山村硝子株式会社 | 樹脂製キャップ |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1399727A (fr) * | 1964-04-09 | 1965-05-21 | J P Grussen Ets | Nouvelle capsule à double filetage |
JPS5681050U (pt) * | 1979-11-20 | 1981-07-01 | ||
US4434917A (en) * | 1981-05-26 | 1984-03-06 | Yoshino Kogyosho Co., Ltd. | Trigger-actuated atomizer |
JPS58113633U (ja) * | 1982-01-23 | 1983-08-03 | 興亜硝子株式会社 | 瓶体首部の構造 |
US4691833A (en) * | 1985-02-15 | 1987-09-08 | The Bridgeport Metal Goods Mfg. Co. | Cap alignment structure |
-
1986
- 1986-02-06 JP JP1986016231U patent/JPH0426342Y2/ja not_active Expired
-
1987
- 1987-02-05 DE DE8787101544T patent/DE3778722D1/de not_active Expired - Fee Related
- 1987-02-05 ES ES87101544T patent/ES2031078T3/es not_active Expired - Lifetime
- 1987-02-05 EP EP19870101544 patent/EP0232856B1/en not_active Expired - Lifetime
- 1987-02-05 PH PH34816A patent/PH25709A/en unknown
-
1995
- 1995-05-18 HK HK75995A patent/HK75995A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PH25709A (en) | 1991-09-18 |
JPH0426342Y2 (pt) | 1992-06-24 |
EP0232856A2 (en) | 1987-08-19 |
ES2031078T3 (es) | 1992-12-01 |
HK75995A (en) | 1995-05-26 |
DE3778722D1 (de) | 1992-06-11 |
JPS62127948U (pt) | 1987-08-13 |
EP0232856A3 (en) | 1988-05-04 |
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