CA2248681A1 - Container sealing cap - Google Patents
Container sealing cap Download PDFInfo
- Publication number
- CA2248681A1 CA2248681A1 CA002248681A CA2248681A CA2248681A1 CA 2248681 A1 CA2248681 A1 CA 2248681A1 CA 002248681 A CA002248681 A CA 002248681A CA 2248681 A CA2248681 A CA 2248681A CA 2248681 A1 CA2248681 A1 CA 2248681A1
- Authority
- CA
- Canada
- Prior art keywords
- closure cap
- guide path
- ridges
- horizontal section
- cap
- 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.)
- Abandoned
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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
- B65D51/00—Closures not otherwise provided for
- B65D51/16—Closures not otherwise provided for with means for venting air or gas
- B65D51/1672—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element
- B65D51/1688—Venting occurring during initial closing or opening of the container, by means of a passage for the escape of gas between the closure and the lip of the container mouth, e.g. interrupted threads
Abstract
The invention concerns a cap for sealing containers which have high internal pressure, the cap substantially consisting of a cap base (3) and a wall (4) secured thereto. Disposed on the inner side of the cap wall is a guide track (6), taking the form of a bayonet-type thread, by means of which the sealing cap (1) can be brought into engagement with retaining cams (7) on the outer surface (8) of a container opening (2). The guide track (6) comprises a locking edge (9) which restricts the unscrewing movement such that the guide track (6) is in engagement with the entire retaining surface (10) of the retaining cams (7) throughout the gas-discharge process while the container is being opened.
Description
PCC039u-/25 . 08 . 9~
A closure cap for closing a container The invention relates to a closure cap for closing a container, according to the preamble of patent claim 1. In particular with containers which have an increased inner pressure, for example on account of drinks containing carbon dioxide, it must be taken care that on removal of the closure cap the inner pressure may escape before the closure cap is completely separated from the opening of the container. With closure caps known up to now, for this purpose on the inner side of the closure cap bleeding slots have been incorporated which permit a gas outflow at a point in time at which the closure cap is still connected to an essential part of the container opening. If no such bleeding slots are provided there exists the danger that the closure cap prematurely pops off from the opening during the opening procedure on account of the increased inner pressure.
A disadvantage of such known closure arrangements lies in the fact that the thread formation on the inner side of the closure cap as well as on the outer side of the container opening requires large wall pieces and thus a larger use of material and thus entails high manufacturing costs. A further disadvantage lies in the fact that the closure cap must alway be partly opened and with that the thread partly comes out of engagement with the container opening by which means there exists the danger that the closure cap shoots off over the thread.
"
US 5,135,124 for reducing the material consumption suggests a closure cap which on its inner side is provided with two different types of retaining elements. With first retaining elements the closure is kept in a closed condition on the container. On opening, the closure is moved into a bleeding position in which it is held on the container by second retaining elements. This closure cap however has the PCC039u~/25 . 08 . 9~1 disadvantage that on transition from the sealing position into the bleeding position for a certain time it is only partly engaged with the retaining elements of the container opening. By way of this again there is the risk of a prema-ture shooting off of the closure cap before a complete pres-sure equalisation between the inner space of the container and the surroundings has taken place. Furthermore such clo-sure caps on account of the various types of retaining elements are complicated in their manufacture.
The object of the present invention lies in recognising the disadvantages of that which is known, thus in particular in providing a closure cap for closing a container with increased inner pressure which can be manufactured simply and with a small use of material and in spite of this prevents a premature shooting off of the closure cap during the opening procedure.
According to the invention these objects are achieved with a closure cap with the features of the characterising part of claim 1.
The closure cap for closing a container with an increased inner pressure consists essentially of a cap floor and a cap wall which on its inner side is provided with a guide path of a bayonet thread. The guide path can be brought into engagement with retaining cams on the outer side of the container opening and comprises a latching position for bleeding gas before the final screwing'off of the closure cap. The latching position of the guide path, according to the invention, is formed by at least one latching edge.
The latching edge limits the screwing off movement in a manner such that the guide path during the whole gas bleeding procedure is in engagement with whole retaining surface of the retaining cams on the container opening. Thanks to the latching edge, given an opening procedure, it is not possible PCCo39u~tzs.08.98 to move the closure cap beyond the latching position before a complete pressure equalisation has taken place. Since the closure cap in the latching position is however still in complete engagement with the retaining cam on the outer side of the container opening, the danger of a premature popping off during the gas bleeding procedure is no greater than with a closed closure cap. With the correct dimensioning of the closure cap for preventing the popping off in the closed condition, also the popping off of the closure cap during the gas bleeding procedure is reliably prevented.
The guide path may for example be formed by two or several ridges projecting inwardly from the inner side of the cap wall. The surface of these ridges facing the cap floor forms the retaining surface with which the closure cap coop-erates with the retaining cam on the outer side of the con-tainer opening. Between this surface and the side of a neigh-bouring ridge, which is distant to the cap floor, there is defined the guide path.
In a particularly preferred embodiment example the guide path is defined by four ridges, i.e. that the guide path consists of four individual part paths. In each case one path is enclosed between two ridges. With such an arrangement the retaining cams on screwing on or with the opening procedure are guided in an exactly defined procedure. with this also the danger of jamming is reliably ruled out. Each ridge extends over an angular range of about 160-200~, preferably 180~. With a uniform arrangement of the four ridges on the circumference there results with this'an overlapping of in each case two neighbouring ridges by about 90~.
In a particularly preferred embodiment example each ridge is formed by four sections. Two of these sections comprise no gradient and run horizontally, i.e. parallel to the floor of the closure cap. The other two sections have a gradient. This gradient is necessary in order to press the PCC039ul~/25 . 08 . 98 closure from the opened position into a sealing position.
When the closure cap with the first horizontal section is in engagement with a retaining cam of a container opening a sealing position is defined. By way of the second horizontal section a gas bleeding position is defined. The two horizon-tal sections are connected to an obliquely running section so than on screwing on the closure cap between the gas bleeding position and the sealing position by way of the gradient the necessary sealing pressure is achieved. The second obliquely running section is arranged at the beginning of each ridge and permits a simple introduction of the retaining cam into the guide paths. The latching edge is preferably arranged at the end of the second horizontal section, this end being distant to the first horizontal section. So that the screwing off movement of the closure cap may be stopped until a com-plete pressure equalisation is achieved, the latching edge is arranged on the surface of at least one ridge, which faces the cap floor.
So that on placing on the closure cap no complications arise by way of jamming, the four ridges would each have to be formed equally. It is however conceivable only to provide a single ridge with a latching edge. In order to interrupt the screwing off movement as reliably as possible however preferably each individual ridge is provided with such a latching edge.
Advantageously the second horizontal section is formed longer than the first horizontal section. By way of the length of the second horizontal sectioh the angular range of the rotational movement is defined with which a bleeding of the gas takes place before the screwing off movement is interrupted. The longer the horizontal section is formed the more comfortable is the screwing off of the closure cap for the user. If the closure cap is screwed off with a relatively slow rotational movement, with a long second horizontal section the pressure equalisation is made before the retain-PCC039u-~25 . 08 . 98 ing cams of the container opening meet the latching edge. In this case the user hardly notices the limiting of the screw-ing off movement. A slight pressing down of the closure cap is sufficient in order to overcome the latching edge. If however the closure cap is quickly screwed off the retaining cams meet the latching edges before a complete pressure equalisation is made. By way of this the opening movement of the closure cap is stopped and the rotational movement of the hand of the user is likewise interrupted.
As long as a complete pressure equalisation has not been made, it is not possible to overcome the latching edge. On account of the still high inner pressure the closure cap may not at all be pressed downwards in order to overcome the latching. ~ompellingly one must wait until a complete or almost complete pressure equalisation is achieved. It has been shown that a second horizontal section which extends over an angular range of 55-70~, preferably 65~, with a normal screwing off speed of the closure hardly leads to an abrupt stop of the screwing on movement by the latching edge.
The distance between the neighbouring ridges is prefer-ably not kept constant over the whole length of the ridge. In particular the distance between the two horizontally running sections is selected smaller than the distance between the obliquely running sections. With this it is to be achieved that the guiding cams may be uniformly guided through the guide path formed between the ridges. By way of this there results a minimal distance between thè ridges in the region of the latching edge. The maximum dist?ance between two ridges is achieved in the region of the obliquely running sections.
This is necessary since the retaining cams on the outer side of the container opening may have a certain lateral exten-sion, and would otherwise would jam with oblique sections lying too close.
In a further embodiment example each ridge may be pro-PCC039u~/25 . 08 . 91~
vided with a relief on an underside distant to the cap floor in the region of the latching edge of the ridge lying there-under in each case. By way of this the guiding of the retain-ing cam in the guide path is additionally increased. In this manner the distance betwen the horizontal sections of two neighbouring ridges may be selected such that the intermedi-ate space corresponds to the thickness of the retaining cams of the container to be closed.
The invention is hereinafter described in more detail by way of the drawings and in embodiment examples. There are shown:
Fig. 1 a schematic representation of a closure cap accord-ing to the invention and of a container opening, Fig. 2 a cross section through the closure cap according to the invention, Fig. 3 a developed view of the inner side of the closure cap of Figure 2, Fig. 4 an enlarged cutout of the developed view of Figure 3, Fig. 5a a developed view with indicated retaining cams in the sealing position, Fig. 5b a developed view with indicatèd retaining cams in a bleeding position, and ' Fig. 6 a cutout from a developed view of an alternative embodiment example.
Figure 1 shows a closure cap 1 and a container opening 2 which can be closed with the closure cap 1. The closure cap 1 consists essentially of a cap floor 3 and a cap wall 4 incor-CA 0224868l l998-09-lO
PCC039u-/25 . 08 . sa porated on the outer edge of the cap floor 3. On the inner side 5 of the cap floor 4 there is provided a guide path which can be brought into engagement with retaining cams 7 on the outer side 8 of the container opening 2. The guide path 6 is limited by ridges 11. For limiting the screwing off move-ment and for defining a latching procedure for bleeding gas the guide path 6 comprises latching edges 9. The latching edges are incorporated onto each ridge 11 on the side of the ridge 11, which faces the cap floor 3. The whole arrangement is formed such that the closure cap 1 during the complete gas bleeding procedure is held by the entirety of the retaining surfaces 10 of the retaining cams 7. The number of ridges 11 may vary in the individual case although three to six ridges 11, but particularly four ridges as a rule lead to an optimal handling and a secure engagement.
Figure 2 shows a cross section through a closure cap according to the invention. In Figure 2 the latching edge 9 limiting the screwing off movement is clearly visible. The closure cap 1 also comprises a sealing lip 17.
Figure 3 shows a developed view of the inner side of the closure cap of Figure 2. The guide path 6 consists of four individual part guide paths which are formed by four ridges 11. Each ridge comprises a latching edge 9 which limits the screwing off movement. In Figure 4 the course of the ridges 11 is more accurately viewable. Each ridge 11 comprises two sections 13a, 13c with a gradient as well as two horizontal sections 13b, 13d running without a gradient. The first horizontal section 13d defines a sealing position and the second horizontal section 13b a gas bleeding position. The two horizontal sections 13b, 13d are connected amongst one another to the section 13c running with a gradient. The latching edge 9 is arranged at the end 14 of the second horizontal section 13b, which is distant from the first horizontal section 13d, on the surface of the ridge 11, which faces the cap floor. The section 13a running with a gradient , PCC039u~/25 . 08 . 98 defines the beginning of the thread and simplifies the intro-duction of the retaining cams at the beginning of the screw-ing on movement thanks to its oblique position. The obliquely running section 13c with a sealing means which is not shown in more detail (for example a sealing lip 17 as shown in Figure 2 and/or a liner seal which is not shown or an outer seal) produces the sealing pressure necessary for the seal-ing .
The distance between two neighbouring ridges 11 is not constant over their whole length. In a reqion 16 of the obliquely running sections 13a, 13c the distance between the ridges 11 is larger than in a region 15 with the horizontal sections 13b, 13d. This is necessary so that a somewhat elongate retaining cam (cam 7 as is shown in Figure 1) does not jam in the region 16 of the sections 13a, 13c running with a gradient. The minimum distance between two neighbour-ing ridges 11 is defined by the latching edge 9.
Figures 5a and 5c show a developed view of the inner side of a closure cap according to the invention with sche-matically shown retaining cams 7 of a container closure in a sealing position (Figure 5a) and in a gas bleeding position (Figure 5b). In the sealing position the horizontal sections 13d are in engagement with the retaining cams 7. So that the screwing on movement is limited in each case an end section 20 connects to the horizontal sections 13d. The end section 20 here is likewise formed as a slant so that together with the oblique section 13c lying thereunder there is formed an exactly defined guide path 6. Basicall~ it is however also conceivable to form the end section 20 vertically.
With the opening procedure the retaining cams 7 are guided from the sealing position shown in Figure 5a into the bleeding position shown in Figure 5b. By way of the sections 13c running with a gradient the complete closure cap, thus also the sealing means which is not represented here, is _ 9 _ PCC039u~ /25 . 08 . 98 lifted up by which means with an high inner pressure there results a bleeding of gas. The movement of the retaining cams 7 is limited by the latching edges 9. As long as there exists an increased inner pressure in the container closed by the closure cap, the ridges ll with their surface facing the cap floor are pressed by the inner pressure firmly against the retaining cams 7. Only with a complete reduction of the inner pressure can the closure cap be easily pressed downwards, which permits an overcoming of the latching edges 9.
In Figure 6 there is shown an alternative embodiment example of the formation of the guide path 6. The first horizontal section 13d on its side distant to the cap floor comprises a relief 18 which is vertically flush with the latching edge 9. With such a design the width of the guide path 6 between the two horizontal sections 13b, 13d may be reduced such that it corresponds to the thickness of the retaining cams on the outer side of a container. With such an arrangement these retaining cams are guided through the guide path 6 in an exactly fitting manner.
A closure cap for closing a container The invention relates to a closure cap for closing a container, according to the preamble of patent claim 1. In particular with containers which have an increased inner pressure, for example on account of drinks containing carbon dioxide, it must be taken care that on removal of the closure cap the inner pressure may escape before the closure cap is completely separated from the opening of the container. With closure caps known up to now, for this purpose on the inner side of the closure cap bleeding slots have been incorporated which permit a gas outflow at a point in time at which the closure cap is still connected to an essential part of the container opening. If no such bleeding slots are provided there exists the danger that the closure cap prematurely pops off from the opening during the opening procedure on account of the increased inner pressure.
A disadvantage of such known closure arrangements lies in the fact that the thread formation on the inner side of the closure cap as well as on the outer side of the container opening requires large wall pieces and thus a larger use of material and thus entails high manufacturing costs. A further disadvantage lies in the fact that the closure cap must alway be partly opened and with that the thread partly comes out of engagement with the container opening by which means there exists the danger that the closure cap shoots off over the thread.
"
US 5,135,124 for reducing the material consumption suggests a closure cap which on its inner side is provided with two different types of retaining elements. With first retaining elements the closure is kept in a closed condition on the container. On opening, the closure is moved into a bleeding position in which it is held on the container by second retaining elements. This closure cap however has the PCC039u~/25 . 08 . 9~1 disadvantage that on transition from the sealing position into the bleeding position for a certain time it is only partly engaged with the retaining elements of the container opening. By way of this again there is the risk of a prema-ture shooting off of the closure cap before a complete pres-sure equalisation between the inner space of the container and the surroundings has taken place. Furthermore such clo-sure caps on account of the various types of retaining elements are complicated in their manufacture.
The object of the present invention lies in recognising the disadvantages of that which is known, thus in particular in providing a closure cap for closing a container with increased inner pressure which can be manufactured simply and with a small use of material and in spite of this prevents a premature shooting off of the closure cap during the opening procedure.
According to the invention these objects are achieved with a closure cap with the features of the characterising part of claim 1.
The closure cap for closing a container with an increased inner pressure consists essentially of a cap floor and a cap wall which on its inner side is provided with a guide path of a bayonet thread. The guide path can be brought into engagement with retaining cams on the outer side of the container opening and comprises a latching position for bleeding gas before the final screwing'off of the closure cap. The latching position of the guide path, according to the invention, is formed by at least one latching edge.
The latching edge limits the screwing off movement in a manner such that the guide path during the whole gas bleeding procedure is in engagement with whole retaining surface of the retaining cams on the container opening. Thanks to the latching edge, given an opening procedure, it is not possible PCCo39u~tzs.08.98 to move the closure cap beyond the latching position before a complete pressure equalisation has taken place. Since the closure cap in the latching position is however still in complete engagement with the retaining cam on the outer side of the container opening, the danger of a premature popping off during the gas bleeding procedure is no greater than with a closed closure cap. With the correct dimensioning of the closure cap for preventing the popping off in the closed condition, also the popping off of the closure cap during the gas bleeding procedure is reliably prevented.
The guide path may for example be formed by two or several ridges projecting inwardly from the inner side of the cap wall. The surface of these ridges facing the cap floor forms the retaining surface with which the closure cap coop-erates with the retaining cam on the outer side of the con-tainer opening. Between this surface and the side of a neigh-bouring ridge, which is distant to the cap floor, there is defined the guide path.
In a particularly preferred embodiment example the guide path is defined by four ridges, i.e. that the guide path consists of four individual part paths. In each case one path is enclosed between two ridges. With such an arrangement the retaining cams on screwing on or with the opening procedure are guided in an exactly defined procedure. with this also the danger of jamming is reliably ruled out. Each ridge extends over an angular range of about 160-200~, preferably 180~. With a uniform arrangement of the four ridges on the circumference there results with this'an overlapping of in each case two neighbouring ridges by about 90~.
In a particularly preferred embodiment example each ridge is formed by four sections. Two of these sections comprise no gradient and run horizontally, i.e. parallel to the floor of the closure cap. The other two sections have a gradient. This gradient is necessary in order to press the PCC039ul~/25 . 08 . 98 closure from the opened position into a sealing position.
When the closure cap with the first horizontal section is in engagement with a retaining cam of a container opening a sealing position is defined. By way of the second horizontal section a gas bleeding position is defined. The two horizon-tal sections are connected to an obliquely running section so than on screwing on the closure cap between the gas bleeding position and the sealing position by way of the gradient the necessary sealing pressure is achieved. The second obliquely running section is arranged at the beginning of each ridge and permits a simple introduction of the retaining cam into the guide paths. The latching edge is preferably arranged at the end of the second horizontal section, this end being distant to the first horizontal section. So that the screwing off movement of the closure cap may be stopped until a com-plete pressure equalisation is achieved, the latching edge is arranged on the surface of at least one ridge, which faces the cap floor.
So that on placing on the closure cap no complications arise by way of jamming, the four ridges would each have to be formed equally. It is however conceivable only to provide a single ridge with a latching edge. In order to interrupt the screwing off movement as reliably as possible however preferably each individual ridge is provided with such a latching edge.
Advantageously the second horizontal section is formed longer than the first horizontal section. By way of the length of the second horizontal sectioh the angular range of the rotational movement is defined with which a bleeding of the gas takes place before the screwing off movement is interrupted. The longer the horizontal section is formed the more comfortable is the screwing off of the closure cap for the user. If the closure cap is screwed off with a relatively slow rotational movement, with a long second horizontal section the pressure equalisation is made before the retain-PCC039u-~25 . 08 . 98 ing cams of the container opening meet the latching edge. In this case the user hardly notices the limiting of the screw-ing off movement. A slight pressing down of the closure cap is sufficient in order to overcome the latching edge. If however the closure cap is quickly screwed off the retaining cams meet the latching edges before a complete pressure equalisation is made. By way of this the opening movement of the closure cap is stopped and the rotational movement of the hand of the user is likewise interrupted.
As long as a complete pressure equalisation has not been made, it is not possible to overcome the latching edge. On account of the still high inner pressure the closure cap may not at all be pressed downwards in order to overcome the latching. ~ompellingly one must wait until a complete or almost complete pressure equalisation is achieved. It has been shown that a second horizontal section which extends over an angular range of 55-70~, preferably 65~, with a normal screwing off speed of the closure hardly leads to an abrupt stop of the screwing on movement by the latching edge.
The distance between the neighbouring ridges is prefer-ably not kept constant over the whole length of the ridge. In particular the distance between the two horizontally running sections is selected smaller than the distance between the obliquely running sections. With this it is to be achieved that the guiding cams may be uniformly guided through the guide path formed between the ridges. By way of this there results a minimal distance between thè ridges in the region of the latching edge. The maximum dist?ance between two ridges is achieved in the region of the obliquely running sections.
This is necessary since the retaining cams on the outer side of the container opening may have a certain lateral exten-sion, and would otherwise would jam with oblique sections lying too close.
In a further embodiment example each ridge may be pro-PCC039u~/25 . 08 . 91~
vided with a relief on an underside distant to the cap floor in the region of the latching edge of the ridge lying there-under in each case. By way of this the guiding of the retain-ing cam in the guide path is additionally increased. In this manner the distance betwen the horizontal sections of two neighbouring ridges may be selected such that the intermedi-ate space corresponds to the thickness of the retaining cams of the container to be closed.
The invention is hereinafter described in more detail by way of the drawings and in embodiment examples. There are shown:
Fig. 1 a schematic representation of a closure cap accord-ing to the invention and of a container opening, Fig. 2 a cross section through the closure cap according to the invention, Fig. 3 a developed view of the inner side of the closure cap of Figure 2, Fig. 4 an enlarged cutout of the developed view of Figure 3, Fig. 5a a developed view with indicated retaining cams in the sealing position, Fig. 5b a developed view with indicatèd retaining cams in a bleeding position, and ' Fig. 6 a cutout from a developed view of an alternative embodiment example.
Figure 1 shows a closure cap 1 and a container opening 2 which can be closed with the closure cap 1. The closure cap 1 consists essentially of a cap floor 3 and a cap wall 4 incor-CA 0224868l l998-09-lO
PCC039u-/25 . 08 . sa porated on the outer edge of the cap floor 3. On the inner side 5 of the cap floor 4 there is provided a guide path which can be brought into engagement with retaining cams 7 on the outer side 8 of the container opening 2. The guide path 6 is limited by ridges 11. For limiting the screwing off move-ment and for defining a latching procedure for bleeding gas the guide path 6 comprises latching edges 9. The latching edges are incorporated onto each ridge 11 on the side of the ridge 11, which faces the cap floor 3. The whole arrangement is formed such that the closure cap 1 during the complete gas bleeding procedure is held by the entirety of the retaining surfaces 10 of the retaining cams 7. The number of ridges 11 may vary in the individual case although three to six ridges 11, but particularly four ridges as a rule lead to an optimal handling and a secure engagement.
Figure 2 shows a cross section through a closure cap according to the invention. In Figure 2 the latching edge 9 limiting the screwing off movement is clearly visible. The closure cap 1 also comprises a sealing lip 17.
Figure 3 shows a developed view of the inner side of the closure cap of Figure 2. The guide path 6 consists of four individual part guide paths which are formed by four ridges 11. Each ridge comprises a latching edge 9 which limits the screwing off movement. In Figure 4 the course of the ridges 11 is more accurately viewable. Each ridge 11 comprises two sections 13a, 13c with a gradient as well as two horizontal sections 13b, 13d running without a gradient. The first horizontal section 13d defines a sealing position and the second horizontal section 13b a gas bleeding position. The two horizontal sections 13b, 13d are connected amongst one another to the section 13c running with a gradient. The latching edge 9 is arranged at the end 14 of the second horizontal section 13b, which is distant from the first horizontal section 13d, on the surface of the ridge 11, which faces the cap floor. The section 13a running with a gradient , PCC039u~/25 . 08 . 98 defines the beginning of the thread and simplifies the intro-duction of the retaining cams at the beginning of the screw-ing on movement thanks to its oblique position. The obliquely running section 13c with a sealing means which is not shown in more detail (for example a sealing lip 17 as shown in Figure 2 and/or a liner seal which is not shown or an outer seal) produces the sealing pressure necessary for the seal-ing .
The distance between two neighbouring ridges 11 is not constant over their whole length. In a reqion 16 of the obliquely running sections 13a, 13c the distance between the ridges 11 is larger than in a region 15 with the horizontal sections 13b, 13d. This is necessary so that a somewhat elongate retaining cam (cam 7 as is shown in Figure 1) does not jam in the region 16 of the sections 13a, 13c running with a gradient. The minimum distance between two neighbour-ing ridges 11 is defined by the latching edge 9.
Figures 5a and 5c show a developed view of the inner side of a closure cap according to the invention with sche-matically shown retaining cams 7 of a container closure in a sealing position (Figure 5a) and in a gas bleeding position (Figure 5b). In the sealing position the horizontal sections 13d are in engagement with the retaining cams 7. So that the screwing on movement is limited in each case an end section 20 connects to the horizontal sections 13d. The end section 20 here is likewise formed as a slant so that together with the oblique section 13c lying thereunder there is formed an exactly defined guide path 6. Basicall~ it is however also conceivable to form the end section 20 vertically.
With the opening procedure the retaining cams 7 are guided from the sealing position shown in Figure 5a into the bleeding position shown in Figure 5b. By way of the sections 13c running with a gradient the complete closure cap, thus also the sealing means which is not represented here, is _ 9 _ PCC039u~ /25 . 08 . 98 lifted up by which means with an high inner pressure there results a bleeding of gas. The movement of the retaining cams 7 is limited by the latching edges 9. As long as there exists an increased inner pressure in the container closed by the closure cap, the ridges ll with their surface facing the cap floor are pressed by the inner pressure firmly against the retaining cams 7. Only with a complete reduction of the inner pressure can the closure cap be easily pressed downwards, which permits an overcoming of the latching edges 9.
In Figure 6 there is shown an alternative embodiment example of the formation of the guide path 6. The first horizontal section 13d on its side distant to the cap floor comprises a relief 18 which is vertically flush with the latching edge 9. With such a design the width of the guide path 6 between the two horizontal sections 13b, 13d may be reduced such that it corresponds to the thickness of the retaining cams on the outer side of a container. With such an arrangement these retaining cams are guided through the guide path 6 in an exactly fitting manner.
Claims (10)
1. A closure cap (1) for closing a container opening (2), with a cap floor (3) and with a cap wall (4) which on its inner side (5) is provided with a guide path (6) of a bayonet thread formed by ridges projecting radially inwardly, wherein the guide path (6) can be brought into engagement with retaining cams (7) on the outer side (8) of the container opening (2), wherein the guide path has a latching position for bleeding gas before the final screwing off of the closure cap (1), and wherein the latching position of the guide path (6) is formed by at least one latching edge (9) which limits the screwing off movement in a manner such that the guide path (6) during the complete gas bleeding procedure is in engagement with the complete retaining surface (10) of the retaining cams (7), characterised in that each bulge (11) comprises four sections (13a, 13b, 13c, 13d) of which sections two horizontal sections (13b, 13d) have no gradient so that a first horizontal section (13d) defines a sealing position and a second horizontal section (13b) a gas bleeding position, wherein the latching edge (9) is arranged on at least one ridge (11) at the end (14) of the second horizontal section (13b), which is distant to the first horizontal section (13d), on the surface facing the cap floor (3).
2. A closure cap according to claim 1, characterised in that the guide path (6) is formed by at least two ridges (11) projecting radially inwardly from the inner side (5) of the cap wall (4), wherein through the intermediate space between in each case two neighbouring ridges (11) a retaining cam (7) of a container opening can be guided.
3. A closure cap according to claim 2, characterised in that the guide path is formed by four ridges.
4. A device according to claim 3, characterised in that each ridge (11) extends over an angular range of 160-200°, preferably 180°.
5. A closure cap according to one of the claims 3 or 4, characterised in that two neighbouring ridges (11) overlap in an angular range of about 90°.
6. A closure cap according to claim 1, characterised in that the second horizontal section (13b) is formed longer than the first horizontal section (13d).
7. A closure cap according to claim 6, characterised in that the second horizontal section (13b) extends over an angular range of 55° to 70°, preferably 65°.
8. A closure cap according to one of the claims 1 to 7, characterised in that the distance between two neighbouring ridges (11) in a region (15) of the horizontal sections (13b, 13d) is smaller than in a region (16) of the sections (13a, 13c).
9. A closure cap according to one of the claims 1 to 8, characterised in that the distance between two neighbouring ridges (11) in the region of the latching edge (9) has a minimum value.
10. A closure cap according to one of the claims 2 to 9, characterised in that each ridge (11) on the lower side facing the cap floor (3) comprises a relief (18) which is flush with the latching edge (9) of the ridge (11) lying thereunder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH88096 | 1996-04-04 | ||
| CH880/96 | 1996-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2248681A1 true CA2248681A1 (en) | 1997-10-16 |
Family
ID=4197335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002248681A Abandoned CA2248681A1 (en) | 1996-04-04 | 1997-03-26 | Container sealing cap |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0894071A1 (en) |
| AU (1) | AU1920297A (en) |
| CA (1) | CA2248681A1 (en) |
| WO (1) | WO1997037901A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7523839B2 (en) * | 2004-04-08 | 2009-04-28 | The Glad Products Company | Ventable spin lock container |
| JP6456216B2 (en) * | 2015-02-27 | 2019-01-23 | 株式会社吉野工業所 | Threaded cap container |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3741421A (en) * | 1971-05-10 | 1973-06-26 | J Wittwer | Safety locking cap |
| US4553678A (en) * | 1984-06-21 | 1985-11-19 | Thorsbakken Arden L | Tamper indicating container safety cover |
| DE8903630U1 (en) * | 1989-03-22 | 1989-08-24 | Coolike-Regnery Gmbh, 6140 Bensheim, De | |
| US5135124A (en) * | 1991-05-09 | 1992-08-04 | Hoover Universal, Inc. | Pressure lock bayonet closure |
| GB9316834D0 (en) * | 1993-08-13 | 1993-09-29 | Beeson & Sons Ltd | Container closure assembly |
| GB9407501D0 (en) * | 1994-04-15 | 1994-06-08 | Birkett Harold | Improved closure for pressure & non-pressurised container |
-
1997
- 1997-03-26 WO PCT/CH1997/000126 patent/WO1997037901A1/en not_active Application Discontinuation
- 1997-03-26 EP EP97906974A patent/EP0894071A1/en not_active Withdrawn
- 1997-03-26 AU AU19202/97A patent/AU1920297A/en not_active Abandoned
- 1997-03-26 CA CA002248681A patent/CA2248681A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO1997037901A1 (en) | 1997-10-16 |
| AU1920297A (en) | 1997-10-29 |
| EP0894071A1 (en) | 1999-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20010326 |