CA2105640A1 - Tube with fixed closure and replaceable closure - Google Patents
Tube with fixed closure and replaceable closureInfo
- Publication number
- CA2105640A1 CA2105640A1 CA002105640A CA2105640A CA2105640A1 CA 2105640 A1 CA2105640 A1 CA 2105640A1 CA 002105640 A CA002105640 A CA 002105640A CA 2105640 A CA2105640 A CA 2105640A CA 2105640 A1 CA2105640 A1 CA 2105640A1
- Authority
- CA
- Canada
- Prior art keywords
- tube
- closure
- nipple
- membrane
- replaceable
- 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
Links
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
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
- B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
-
- 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
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/44—Closures
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0006—Upper closure
- B65D2251/0015—Upper closure of the 41-type
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0087—Lower closure of the 47-type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Closures For Containers (AREA)
- Tubes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Closing Of Containers (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
ABSTRACT
The invention relates to a tube having a tube head which is provided with a fixed closure and a replaceable closure mountable on the tube head. The fixed closure is a membrane which completely closes the muzzle of the tube head, is integral with the tube head and made of the same material. At least the membrane and the adjoining portions of the tube head are made of a plastic material. A nipple is formed on the membrane in the shipping condition of the tube which is provided as an opening means for the rupturing of the fixed closure. The nipple protrudes from the muzzle end and is received in a recess in the replaceable closure mounted on the tube head. The nipple is constructed as a grip which loosely fits into the recess in the replaceable closure and, thus, is invisible in the shipping condition of the tube. This construction permits the fixed closure to be comfortably, reliably and completely removed from the tube head.
The invention relates to a tube having a tube head which is provided with a fixed closure and a replaceable closure mountable on the tube head. The fixed closure is a membrane which completely closes the muzzle of the tube head, is integral with the tube head and made of the same material. At least the membrane and the adjoining portions of the tube head are made of a plastic material. A nipple is formed on the membrane in the shipping condition of the tube which is provided as an opening means for the rupturing of the fixed closure. The nipple protrudes from the muzzle end and is received in a recess in the replaceable closure mounted on the tube head. The nipple is constructed as a grip which loosely fits into the recess in the replaceable closure and, thus, is invisible in the shipping condition of the tube. This construction permits the fixed closure to be comfortably, reliably and completely removed from the tube head.
Description
21()~40 TUBE WITH FIXED CLOSURE AND REPLACEABLE CLOSURE
The invention relates to a tube containers and more particularly to tubes having a fixed closure and a replaceable closure.
German Patent 26 53 993 discloses a tube which in the shipping condition has a fixed closure that hermetically seals the tube contents to the atmoQphere before first use of the tube and a replaceable closure that for a certain period of use fairly reliably seals the tube after removal of the Pixed closure and until the tube contents are exhausted.
It is especially important that the tube is hermetically sealed by the fixed closure in the shipping condition, more particularly for the time between fillin~ of the tube and use of its contents when the tube contents include volatile components or deteriorate at the air, i.e.
oxidize, attract humidity, or decompose. Thus, the field of use of tubes of this general type is widespread and includes for example tubes for foodstuffs or for pha maceutical, cosmetical or technical applications, for example adhesives conta~ning tubes.
In some conventional-tubes, the whole tube body is made of metal and the fixed enclosure is a metal membrane integral with the tube body which closes the tube opening. A screw-on cap for mounting on the tube head which cooperates with an appropriate outer thread on the tube head ls used as the replaceable closure. A thorn which is provided on the outer end face of the screw-on cap and i8 made of the cap's material is used for the piercing of the membrane. However, the resulting opening has a frayed shape and its size depends on the amount of pres3ure applied by the user which is hard to foresee. Purthermore, a screw-on cap having an exposed thorn is considered to be ~nesthetic.
A series of differently constructed tubes is known which all have a ; fixed and a replaceable closure but wherein the fixed closure is not a membrane. Metal or plastic tubes are known hav1ng special closure caps l~ which are ini~ially sealingly seated on the tube head as fixed closures.
- At least one nominal rupture zone is then provided in the body of such tubes 80 that upon exertion of a strong torque on the rup~ure zone, the fixed closure ls broken into a now functionally uselees part which remains on the tube neck and a cap portion which functions as replaceable I closure. A container of this general type made of soft plastic is known, ;1 ' .
. . . . - . , .
`-: ' : ' . ' ', ' . ' '', ' ' : . ' ', - , 210~640 for example, from Swiss Patent 566,904. The open end of the cap disclosed therein which is initially integral with the container body can be used as a replaceable closure after its severed and tightly fits onto a neck of the tube body, whereby a cylindrical protrusion which is integrally formed on the inside of the replaceable closure cap sealingly extends into and plugs the discharge opening in the neck of the tube body.
In other constructions, the cap which is initially integral w~th the container body is broken into more than two pieces. However, the useless, remaining parts of the originally fixed closure are considered ~nconvenient by the user who often maXes a special effort to remove the remaining parts from the tube body.
Other fixed seals for the discharge opening in the tube head of conventional plastic tubes are known which are placed after manufacture of the tube and before the filling thereof and are special mostly aluminum coated plastic plugs fastened by welding.
- Plastic tubes are also known which are provided with a molded-on tear-off closure, for example for coffee cream, small shampoo packages, etc. However, although the torn-off closure can be turned around and loosely pushed back into the tube head, a sufficiently tight re-closing 20 as with a reliable screw-on connection or with a tightly sealing pure plug-in connection is generally not possible.
German Patent 26 53 993 shows a tube container having a fixed and a replaceable closure in the shipping conditlon which is especially intended for single use. It is made of thin plastic, for example 25 polyethylene or polypropylene having a thicXnes~ of a few tenths of a millimeter, in order to be easily compressible. A con~cal container neck ha~ing the same wall thickness as the remainder of the container ends in ~ ~lat end fsce which can be regarded as a flat membrane having the s thickness of the container wall. An annular groove in the flat end face 30 provides a nominal rupture area. ~ pin-type nipple extends in axial dirçction of the tube and from the end face region surrounded by the aDnular groove into a central recess of a closure cap which is ~ade of the same material as the container neck and tightly surrounds the latter. DuriDg manufacture, the container and the closure cap ~re 35 combined into an integral part by achievement of a strong interference fit of the nipple in the recess of the closure cap. If tarque is then .
2la~6~0 exerted onto the nipple by rotation of the closure cap, it is broken-off or torn out of the end face of the container neck 80 that a discharge opening i8 created in the end face of the container neck for the emptying -of the container contents. The membrane-liXe end face of the container S neck i8 used as the fixed closure, even when the container is to be repeatedly used. The closure cap including the nipple can be slipped over the container neck after opening of the container and i~ used as the replaceable closure. Upon re-closing of the container, the nipple enigages the discharge opening of the container and functions as a plug lO ~ust as in the container of the Swiss Patent 566,904. However, since the discharge opening has been first broken or ripped open in contrast to the container of the Swis8 Patent 566,904, the discharge opening even when carefully manufactured tends to have an irregular circumferential contour 80 that when the nipple i8 pushed into the broken or ripped open 15 irregularly shaped discharge opening during re-closure of the container, the nipple ~ay be difficult to slip-on or ~am which can eventually impede rotation of the replaceable ~cre~-on closure.
It is now an ob~ect of the invention ~o provide a tube which is at least partly made of plastic and has a fixed closure and a replaceable 20 closure, wherein an opening means for the opening of the flxed closure is provided which is not visible when the replaceable cap is mounted and permits the fixed closure to be comfortably and reliably ripped out as in the last described conventional tube container, and wherein a trouble-free re-cloaing of the tube with the replaceable closure is 25 possible and any interference with the rotation of the replaceable closure is prevented.
This obJect is achieved in a tube of the above described general type whereln the f~xed closure is a plastic membrane onto which a nipple is fonmed. However, in contrast to the k~own containers, the-nipple 30 protrudes beyond the edge of the tube head openinig to provide an easily Z manipulated grip after removal of the replaceable closure. The size of the grip should be selected 80 that the user can comfortably hold the nipple shaped igrip and largely remove the membrane from the opening at ~ the tube muzzle therewith 80 that a controlled and relatively clean tube 3 35 muzzle is relisbly achieved. The nipple and the ad~oini~g ripped out, portions of the membrane are then thrown away. Thus, the nipple can no `1i -~ ,.. .. - .- ~- - .; ,. : . : : . . . , . ,, -210~640 longer lead to blockages or other trouble when the container i8 re-sealed with the replaceable closure. However, embodiments wherein the fixed closure i8 ruptured by the transmission of torque from the attached replaceable closure to the nipple by way of an irregularly shaped nipple loosely fitting into a complementarily shaped recess in the replaceable closure are not excluded from the scope of the present invention.
Accordingly, the invention provides a tube having a perma~ent closure which hermetically seals the tube contents towards the atmosphere in the shipping conditlon of the tube and a replaceable closure which 1s mountable on a head of the tube for re-closing the tube head after opening of the flxed closure, including a tube body having ~ tube head, a discharge muzzle in the tube head, a replaceable closure mountable on the tube head, and a membrane closing the mouth in the tube head, which is integral with the tube head and made of the ~ame material as a tube head, whereby at least the membrane and the adjoining portions of the tube head are made of a plaatic material, the membrane including an opening means for opening the fixed closure, the opening means being an integral, outwardly protruding nipple made of the same material as the membrane, ~hich i8 constructed a~ a grip, protrudes from the edge of the muzzle and, when the replaceable closure i8 mounted on the tube head, into a recess in the replaceable clo~ure and 1003ely fitæ into the recess of the replaceable closure in the shipping conditlon of the tube. Thus, in the shipping condition of the tube, the replaceable closure i~ lnvisible a8 in conventional containers, when the tube is shipped with the replaceable -closure installed on the tube head. ~owever, this does not exclude the possibility of s~ipping the replaceable closure separate from the tube body, for example for packaging reasons, leaYing the mounting of the replaceable closure to the user. The waste produced by ripp~ng out the membrane together with the nipple is insignificant.
It is possible and general b desired to manufacture the entire tube body including the membrane and the nipple formed thereon from plastic.
When a conventional replaceable closure, especially a screw-on cap or push-on cap is used, the plastic tube in accordance with the ~n~ention optically and esthetically appears as a "regular" tube. The arrangeme~t for the opening of the fixed closure appears only after the first removal of the removable closure placed thereover. Upon ripping out of the -, , ~ - - .
i .` . ' .
2~0~0 membrane by way of the nipple, the consumer then obtains the customary type of tube including negligible remains of the original fixed closure.
This tube can then be repeatedly opened and closed in the conventional way by using the replaceable closure. Thus, the tube appears like a conventional tube in the shipping condition when the replaceable cap is mounted and also later during use when ln the re-closed condition.
The fixed closure in accordance with the invention can also be easily and economically achieved by manufacturing the membrane and nipple together with the ad~oining portions of the tube head and preferably together with the whole tube body. When moldable plastics are used, at least the nipplej the membrane and the ad~oining regions of the tube head, but preferably the whole tube body with the exception of the replaceable closure, can be made in the form of a single molded piece.
The person skilled in the art will then be readily able to select the appropriate material for the replaceable closure. Of course, it can also be made of plastics, for example the one of the tube body or the membrane and the nipple, howe~er this i~ not always neCeQsary. The replaceable clo~ure could even be made of metal. The plastics material of the -membrane and the nipple and, in the extreme case, of the whole tube body is preferably a thermoplastic plastics material, whereby cases where duroplastic materials are used are not excluded from the scope of the present inYention.
Minimal ma~erial cost and sufficient ~orm stability of the nipple can be achleved when the nipple is a hollow body which i8 connected with the tube interior. One can even go 80 far as to make the hollow body of the same thickness as the membrane without seriously interfering with the desired nipple function. The nipple 18 preferably positioned symmetrically to the axis of the tube to improve moldabllity and optical appearance. In general, the nipple is preferably centered on the membrane. In a preferred embodiment, a ma~or portion of the tube opening is covered by the nipple and only a minor portion by the membrane so that the rupture line on the membrane is automatically moved outward toward the edge of the tube opening. Furthermore, when a nominal rupture zone i8 provided between the tube head and the nipple in the remainin8 membrane, the ripping out of the membrane-is facilitated and the tube !' ` . ~ . .
210~0 opening after removal of the fixed closure i~ substantially clean, free of ridges and has a precisely predetermined size.
When the membrane is moved inward relative to the edge of the muzzle, the lever length of the nipple is increased but this has no influence on the nipple receiving recess in the replaceable closure. The edge of the muzzle in the tube head is then preferably rounded in order to avoid undesired sharp edges at the muzzle. To facilitate molding and to improve optical appearance, the curved muzzle edge continues into the recessed membrane at a constant radius. When the membrane is recessed and preferably when the edge of ~he muzzle is rounded, the nipple can be used not only as a handle or lever with undetermined force support but also as a pivoted lever which comes to rest against the muzzle edge at some point when it is laterally forced by the user æo that the rupturing of the membrane is initiated at a point radially opposite the point of engagement between the nipple and the muzzle edge. In the extr~e case, the user can be given a required direction of t11t for the nipple. An initial rupture zone adapted for the tipping effect can then be provided in the membrane in the opposite direction. However, normally the user will not be burdened with such special instructions, since rupturing forces can be achieved with an appropriate lever transmission of the pivoted le~er which are sufficiently large for rupturing a regular membrane and especially a membrane provided with a nominal rupture zone, for exa~ple by providing a short lever arm between the lever support and the point o~ rupture and a lon8 lever arm on the grip.
The outer ~urface of the nipple iB preferably provided with a fluted -gripping surface whlch facilitates handling by the user. When the tube muzzle is circular in cross-section, the body of the nipple i8 preerably of cylindrical shape. The free-end wall of the nipple is preferably concave in order to prevent the nipple excesqively pushing into or in~uring the hand of the user or causing other damage when the fixed closure is still in place and the nipple protrudes from the-muzzle in the tube head.
Finally, when the replaceable closure i8 constructed as a stand so that the tube when re-closed with the replaceable closure can be stored head-down, the in~ention can be used in connection with tubes which, for . .
. . - . . : . . - . ,. , , .: - :
- . , . , - .. . . : .
example, include viscous contents that are preferably collected at the tube mouth while the tube ~s not in use.
A preferred embodiment of the invention will now be further described in the following with reference to the attached drawings, wherein Figure 1 is an elevational view of a tube in accordance with the in~ention;
Figure 2 is an enlarged cross-section through the tube head and the replaceable closure;
Figure 3 i8 a cross-section through the upper region of the tube head showing the nipple;
Figure 4 is a top view of the tube body;
Figure 5 is a partial cross-section similar to the one shown in Figure 3 but including a mounted replaceable closure;
Figure 6 i8 a partial cross-section of the tube body with partly removed fixed closure; and Figure 7 is a cross-section through the tube head similsr to the one in Figure 3 but after removal of the fixed closure.
Figure 1 shows a tube as it will appear in the shipping condit1On and during use. It includes a tube body 2 and a conical, tapered æhoulder 4 which connects the-tube body with a tube head 6 (æee Figures 2 to 7). A screw-on cap is mounted on the tube head as replaceable closure 8. The cylindrical outer surface of the replaceable clo~ure 8 is thereby flush with the al~o cylindrical outer surface of the filled tube body 2.
The end of the tube opposite the tube head i8 hermetically closed in the conventional way in the region of a closure zone 10 which can be produced, for example, by compre~sing, welding or the like.
The material of the whole tube body 2 including the tube head 6 and preferably al~o the replaceable closure 8 is a moldable plastic and generally a thermoplastic material.
The following details of the tube are shown in Figures 2 to 7. The tube head 6 includeQ a cylindrical continuation 12 of shoulder 4 which on its outer surface is provided ~ith a thread 14 onto w~ich the replaceable closure is screwed. A conical intermediate portion 16 connects the cylinder 12 with a cylindrical ~uzæle 18 of the tube at the tube head 6.
The edge 20 of the muzzle 18 is rounded. In the shipping condition of .-: . " . . , : : . . . .
- ~ - : .. . , .:
"~ ' ' . ' ' ' ' 21056~0 the tube, the muzzle 18 is closed by a membrane 22 which is recessed into the muzzle by at least the curved portion of the muzzle edge 20, is an integral part of the muzzle 18 and i~ preferably formed together with the whole tube body 2 including the tube head 6 as a single molded part.
This single molded part also includes a nipple 24 which extends outward from the membrane, is a cylindrical hollow body 26 connected with the interior of the tube and has the same as, or a smaller or larger wall thicknesæ than as the membrane. The ma~or portion of the hollow body 26 of nipple 24 i8 located beyond the muzzle edge 20 and is domed at its free end 28. Both the domed end 28 and the outer surface of the hollow body 26 are provided with a gripping surface 30 such as a roughened, fluted or rippled surface or the like.
The nipple 24, the membrane 22, the mouth 18 and the whole tube head 6 are symmetrical to a common axis (not shown). The membrane 22 together with the hollow nipple 24 provides a fixed closure 32 which hermetically seals the tube contents towards the atmosphere. The nipple 24 thereby takes up the largest portion of the diameter of the free opening of the muzzle 18 and i8 connected with the inner ~all of the muzzle by only a narrow, annular membrane ring. The membrane ring is positioned perpendicular to the inner surface of the mouth 18, but can also ha~e a constant curvature and merge with the rounded muzzle edge 20. The small membra~e ring formed by the actual membrane 22 which in itself can be easily ruptured because of ~he rigidity of the nipple 24 can be further pro~ided, as desired, with a preferably annular, embossed weakness zone ant that preferably in the iLmediate or clo~ed vicinity of the inner surface of the mouth 180 The replaceable closure 8 is a tightly fitting push-on cap or a screw-on cap having a cylindrical cap mantle 34 and a cap end wall 36. An inner thread 38 is provided on the free-end of the cap mantle 34 ~hich is complementary to and cooperates with the thread 14 on the tube head 6 and seals the tube together therewith when the replaceable closure 8 i8 mounted on the tube head 6. The edge 40 of the - -cap mantle 34 which i8 beveled Oh the inside can cooperate with the shoulder 4 on the tube body 2 to provide a stop arrangement, if desired.
However, it is often sufficient to rotate the threads to the end position. The screw-on cap type replaceable closure 8 has such an axial length that the cap end wall 36 iæ positioned beyond t~e end face 28 of ' .- . i ,, .. .. ,.. ~ ., .~. :
2105~
the nipple 24. A cylindrical guard for the tube which surrounds the nipple 24 and protects it from deformation extends from the cap end wall 36 and even surrounds the cylindrical outer surface of the muzzle 18. A
region of tight fit between the inner surface of the guard 42 and the outer surface of the muzzle can be provided, if desired. Instead of the above described stop arrangement, the end of the guard 42 can be constructed to engage the intermediate portion 16 to stop the rotation of the replaceable closure 8, when fully mounted. The permanent closure 32 is opened by the user by pulling or tilting the nipple 24 (see Figure 6~, whereby the membrane is broken and~or completely ripped out. In the extreme case, the tilting can be carried out by supporting the nipple in a lever type arrangement on the muzzle edge 20 on the tube head 6. A
practically ridge and remains-free ruptured zone 44 (see Figure 7~
remains after rupturing of the fixed closure which no longer or only slightly reduces the free cross-sectional area of the tube muzzle.
The described construction of the fixed closure which is present in the shipping condition of the tube, not only provides for a good hermetic seal for the tube contents prior to use which is easily removable, but also has excellent optical identifying characteristics of an original seal which even from a distance indicates the integrity of the tube when the replacement closure is removed. For the average user, the tube has no unusual optical ha~dling or use characteristicq.
The outer end surface of the replaceable closure 8 can be constructed as a supporting surface 44 to allow storage of the tube on its head when the tube contents are viscous or, in general, when a complete drainage of the tube contents is deqired, since this manner of storage forces the tube contents to flow towards the tube opening. In this embodiment, the ~upporting surface 44 is a plane end surface which contin~es in a curve or bevel 46 into the outer surface of the replaceable closure ~ which is flush with the tube body 2. However, supporting surfaces of any other appropriate construction can also be used.
The invention relates to a tube containers and more particularly to tubes having a fixed closure and a replaceable closure.
German Patent 26 53 993 discloses a tube which in the shipping condition has a fixed closure that hermetically seals the tube contents to the atmoQphere before first use of the tube and a replaceable closure that for a certain period of use fairly reliably seals the tube after removal of the Pixed closure and until the tube contents are exhausted.
It is especially important that the tube is hermetically sealed by the fixed closure in the shipping condition, more particularly for the time between fillin~ of the tube and use of its contents when the tube contents include volatile components or deteriorate at the air, i.e.
oxidize, attract humidity, or decompose. Thus, the field of use of tubes of this general type is widespread and includes for example tubes for foodstuffs or for pha maceutical, cosmetical or technical applications, for example adhesives conta~ning tubes.
In some conventional-tubes, the whole tube body is made of metal and the fixed enclosure is a metal membrane integral with the tube body which closes the tube opening. A screw-on cap for mounting on the tube head which cooperates with an appropriate outer thread on the tube head ls used as the replaceable closure. A thorn which is provided on the outer end face of the screw-on cap and i8 made of the cap's material is used for the piercing of the membrane. However, the resulting opening has a frayed shape and its size depends on the amount of pres3ure applied by the user which is hard to foresee. Purthermore, a screw-on cap having an exposed thorn is considered to be ~nesthetic.
A series of differently constructed tubes is known which all have a ; fixed and a replaceable closure but wherein the fixed closure is not a membrane. Metal or plastic tubes are known hav1ng special closure caps l~ which are ini~ially sealingly seated on the tube head as fixed closures.
- At least one nominal rupture zone is then provided in the body of such tubes 80 that upon exertion of a strong torque on the rup~ure zone, the fixed closure ls broken into a now functionally uselees part which remains on the tube neck and a cap portion which functions as replaceable I closure. A container of this general type made of soft plastic is known, ;1 ' .
. . . . - . , .
`-: ' : ' . ' ', ' . ' '', ' ' : . ' ', - , 210~640 for example, from Swiss Patent 566,904. The open end of the cap disclosed therein which is initially integral with the container body can be used as a replaceable closure after its severed and tightly fits onto a neck of the tube body, whereby a cylindrical protrusion which is integrally formed on the inside of the replaceable closure cap sealingly extends into and plugs the discharge opening in the neck of the tube body.
In other constructions, the cap which is initially integral w~th the container body is broken into more than two pieces. However, the useless, remaining parts of the originally fixed closure are considered ~nconvenient by the user who often maXes a special effort to remove the remaining parts from the tube body.
Other fixed seals for the discharge opening in the tube head of conventional plastic tubes are known which are placed after manufacture of the tube and before the filling thereof and are special mostly aluminum coated plastic plugs fastened by welding.
- Plastic tubes are also known which are provided with a molded-on tear-off closure, for example for coffee cream, small shampoo packages, etc. However, although the torn-off closure can be turned around and loosely pushed back into the tube head, a sufficiently tight re-closing 20 as with a reliable screw-on connection or with a tightly sealing pure plug-in connection is generally not possible.
German Patent 26 53 993 shows a tube container having a fixed and a replaceable closure in the shipping conditlon which is especially intended for single use. It is made of thin plastic, for example 25 polyethylene or polypropylene having a thicXnes~ of a few tenths of a millimeter, in order to be easily compressible. A con~cal container neck ha~ing the same wall thickness as the remainder of the container ends in ~ ~lat end fsce which can be regarded as a flat membrane having the s thickness of the container wall. An annular groove in the flat end face 30 provides a nominal rupture area. ~ pin-type nipple extends in axial dirçction of the tube and from the end face region surrounded by the aDnular groove into a central recess of a closure cap which is ~ade of the same material as the container neck and tightly surrounds the latter. DuriDg manufacture, the container and the closure cap ~re 35 combined into an integral part by achievement of a strong interference fit of the nipple in the recess of the closure cap. If tarque is then .
2la~6~0 exerted onto the nipple by rotation of the closure cap, it is broken-off or torn out of the end face of the container neck 80 that a discharge opening i8 created in the end face of the container neck for the emptying -of the container contents. The membrane-liXe end face of the container S neck i8 used as the fixed closure, even when the container is to be repeatedly used. The closure cap including the nipple can be slipped over the container neck after opening of the container and i~ used as the replaceable closure. Upon re-closing of the container, the nipple enigages the discharge opening of the container and functions as a plug lO ~ust as in the container of the Swiss Patent 566,904. However, since the discharge opening has been first broken or ripped open in contrast to the container of the Swis8 Patent 566,904, the discharge opening even when carefully manufactured tends to have an irregular circumferential contour 80 that when the nipple i8 pushed into the broken or ripped open 15 irregularly shaped discharge opening during re-closure of the container, the nipple ~ay be difficult to slip-on or ~am which can eventually impede rotation of the replaceable ~cre~-on closure.
It is now an ob~ect of the invention ~o provide a tube which is at least partly made of plastic and has a fixed closure and a replaceable 20 closure, wherein an opening means for the opening of the flxed closure is provided which is not visible when the replaceable cap is mounted and permits the fixed closure to be comfortably and reliably ripped out as in the last described conventional tube container, and wherein a trouble-free re-cloaing of the tube with the replaceable closure is 25 possible and any interference with the rotation of the replaceable closure is prevented.
This obJect is achieved in a tube of the above described general type whereln the f~xed closure is a plastic membrane onto which a nipple is fonmed. However, in contrast to the k~own containers, the-nipple 30 protrudes beyond the edge of the tube head openinig to provide an easily Z manipulated grip after removal of the replaceable closure. The size of the grip should be selected 80 that the user can comfortably hold the nipple shaped igrip and largely remove the membrane from the opening at ~ the tube muzzle therewith 80 that a controlled and relatively clean tube 3 35 muzzle is relisbly achieved. The nipple and the ad~oini~g ripped out, portions of the membrane are then thrown away. Thus, the nipple can no `1i -~ ,.. .. - .- ~- - .; ,. : . : : . . . , . ,, -210~640 longer lead to blockages or other trouble when the container i8 re-sealed with the replaceable closure. However, embodiments wherein the fixed closure i8 ruptured by the transmission of torque from the attached replaceable closure to the nipple by way of an irregularly shaped nipple loosely fitting into a complementarily shaped recess in the replaceable closure are not excluded from the scope of the present invention.
Accordingly, the invention provides a tube having a perma~ent closure which hermetically seals the tube contents towards the atmosphere in the shipping conditlon of the tube and a replaceable closure which 1s mountable on a head of the tube for re-closing the tube head after opening of the flxed closure, including a tube body having ~ tube head, a discharge muzzle in the tube head, a replaceable closure mountable on the tube head, and a membrane closing the mouth in the tube head, which is integral with the tube head and made of the ~ame material as a tube head, whereby at least the membrane and the adjoining portions of the tube head are made of a plaatic material, the membrane including an opening means for opening the fixed closure, the opening means being an integral, outwardly protruding nipple made of the same material as the membrane, ~hich i8 constructed a~ a grip, protrudes from the edge of the muzzle and, when the replaceable closure i8 mounted on the tube head, into a recess in the replaceable clo~ure and 1003ely fitæ into the recess of the replaceable closure in the shipping conditlon of the tube. Thus, in the shipping condition of the tube, the replaceable closure i~ lnvisible a8 in conventional containers, when the tube is shipped with the replaceable -closure installed on the tube head. ~owever, this does not exclude the possibility of s~ipping the replaceable closure separate from the tube body, for example for packaging reasons, leaYing the mounting of the replaceable closure to the user. The waste produced by ripp~ng out the membrane together with the nipple is insignificant.
It is possible and general b desired to manufacture the entire tube body including the membrane and the nipple formed thereon from plastic.
When a conventional replaceable closure, especially a screw-on cap or push-on cap is used, the plastic tube in accordance with the ~n~ention optically and esthetically appears as a "regular" tube. The arrangeme~t for the opening of the fixed closure appears only after the first removal of the removable closure placed thereover. Upon ripping out of the -, , ~ - - .
i .` . ' .
2~0~0 membrane by way of the nipple, the consumer then obtains the customary type of tube including negligible remains of the original fixed closure.
This tube can then be repeatedly opened and closed in the conventional way by using the replaceable closure. Thus, the tube appears like a conventional tube in the shipping condition when the replaceable cap is mounted and also later during use when ln the re-closed condition.
The fixed closure in accordance with the invention can also be easily and economically achieved by manufacturing the membrane and nipple together with the ad~oining portions of the tube head and preferably together with the whole tube body. When moldable plastics are used, at least the nipplej the membrane and the ad~oining regions of the tube head, but preferably the whole tube body with the exception of the replaceable closure, can be made in the form of a single molded piece.
The person skilled in the art will then be readily able to select the appropriate material for the replaceable closure. Of course, it can also be made of plastics, for example the one of the tube body or the membrane and the nipple, howe~er this i~ not always neCeQsary. The replaceable clo~ure could even be made of metal. The plastics material of the -membrane and the nipple and, in the extreme case, of the whole tube body is preferably a thermoplastic plastics material, whereby cases where duroplastic materials are used are not excluded from the scope of the present inYention.
Minimal ma~erial cost and sufficient ~orm stability of the nipple can be achleved when the nipple is a hollow body which i8 connected with the tube interior. One can even go 80 far as to make the hollow body of the same thickness as the membrane without seriously interfering with the desired nipple function. The nipple 18 preferably positioned symmetrically to the axis of the tube to improve moldabllity and optical appearance. In general, the nipple is preferably centered on the membrane. In a preferred embodiment, a ma~or portion of the tube opening is covered by the nipple and only a minor portion by the membrane so that the rupture line on the membrane is automatically moved outward toward the edge of the tube opening. Furthermore, when a nominal rupture zone i8 provided between the tube head and the nipple in the remainin8 membrane, the ripping out of the membrane-is facilitated and the tube !' ` . ~ . .
210~0 opening after removal of the fixed closure i~ substantially clean, free of ridges and has a precisely predetermined size.
When the membrane is moved inward relative to the edge of the muzzle, the lever length of the nipple is increased but this has no influence on the nipple receiving recess in the replaceable closure. The edge of the muzzle in the tube head is then preferably rounded in order to avoid undesired sharp edges at the muzzle. To facilitate molding and to improve optical appearance, the curved muzzle edge continues into the recessed membrane at a constant radius. When the membrane is recessed and preferably when the edge of ~he muzzle is rounded, the nipple can be used not only as a handle or lever with undetermined force support but also as a pivoted lever which comes to rest against the muzzle edge at some point when it is laterally forced by the user æo that the rupturing of the membrane is initiated at a point radially opposite the point of engagement between the nipple and the muzzle edge. In the extr~e case, the user can be given a required direction of t11t for the nipple. An initial rupture zone adapted for the tipping effect can then be provided in the membrane in the opposite direction. However, normally the user will not be burdened with such special instructions, since rupturing forces can be achieved with an appropriate lever transmission of the pivoted le~er which are sufficiently large for rupturing a regular membrane and especially a membrane provided with a nominal rupture zone, for exa~ple by providing a short lever arm between the lever support and the point o~ rupture and a lon8 lever arm on the grip.
The outer ~urface of the nipple iB preferably provided with a fluted -gripping surface whlch facilitates handling by the user. When the tube muzzle is circular in cross-section, the body of the nipple i8 preerably of cylindrical shape. The free-end wall of the nipple is preferably concave in order to prevent the nipple excesqively pushing into or in~uring the hand of the user or causing other damage when the fixed closure is still in place and the nipple protrudes from the-muzzle in the tube head.
Finally, when the replaceable closure i8 constructed as a stand so that the tube when re-closed with the replaceable closure can be stored head-down, the in~ention can be used in connection with tubes which, for . .
. . - . . : . . - . ,. , , .: - :
- . , . , - .. . . : .
example, include viscous contents that are preferably collected at the tube mouth while the tube ~s not in use.
A preferred embodiment of the invention will now be further described in the following with reference to the attached drawings, wherein Figure 1 is an elevational view of a tube in accordance with the in~ention;
Figure 2 is an enlarged cross-section through the tube head and the replaceable closure;
Figure 3 i8 a cross-section through the upper region of the tube head showing the nipple;
Figure 4 is a top view of the tube body;
Figure 5 is a partial cross-section similar to the one shown in Figure 3 but including a mounted replaceable closure;
Figure 6 i8 a partial cross-section of the tube body with partly removed fixed closure; and Figure 7 is a cross-section through the tube head similsr to the one in Figure 3 but after removal of the fixed closure.
Figure 1 shows a tube as it will appear in the shipping condit1On and during use. It includes a tube body 2 and a conical, tapered æhoulder 4 which connects the-tube body with a tube head 6 (æee Figures 2 to 7). A screw-on cap is mounted on the tube head as replaceable closure 8. The cylindrical outer surface of the replaceable clo~ure 8 is thereby flush with the al~o cylindrical outer surface of the filled tube body 2.
The end of the tube opposite the tube head i8 hermetically closed in the conventional way in the region of a closure zone 10 which can be produced, for example, by compre~sing, welding or the like.
The material of the whole tube body 2 including the tube head 6 and preferably al~o the replaceable closure 8 is a moldable plastic and generally a thermoplastic material.
The following details of the tube are shown in Figures 2 to 7. The tube head 6 includeQ a cylindrical continuation 12 of shoulder 4 which on its outer surface is provided ~ith a thread 14 onto w~ich the replaceable closure is screwed. A conical intermediate portion 16 connects the cylinder 12 with a cylindrical ~uzæle 18 of the tube at the tube head 6.
The edge 20 of the muzzle 18 is rounded. In the shipping condition of .-: . " . . , : : . . . .
- ~ - : .. . , .:
"~ ' ' . ' ' ' ' 21056~0 the tube, the muzzle 18 is closed by a membrane 22 which is recessed into the muzzle by at least the curved portion of the muzzle edge 20, is an integral part of the muzzle 18 and i~ preferably formed together with the whole tube body 2 including the tube head 6 as a single molded part.
This single molded part also includes a nipple 24 which extends outward from the membrane, is a cylindrical hollow body 26 connected with the interior of the tube and has the same as, or a smaller or larger wall thicknesæ than as the membrane. The ma~or portion of the hollow body 26 of nipple 24 i8 located beyond the muzzle edge 20 and is domed at its free end 28. Both the domed end 28 and the outer surface of the hollow body 26 are provided with a gripping surface 30 such as a roughened, fluted or rippled surface or the like.
The nipple 24, the membrane 22, the mouth 18 and the whole tube head 6 are symmetrical to a common axis (not shown). The membrane 22 together with the hollow nipple 24 provides a fixed closure 32 which hermetically seals the tube contents towards the atmosphere. The nipple 24 thereby takes up the largest portion of the diameter of the free opening of the muzzle 18 and i8 connected with the inner ~all of the muzzle by only a narrow, annular membrane ring. The membrane ring is positioned perpendicular to the inner surface of the mouth 18, but can also ha~e a constant curvature and merge with the rounded muzzle edge 20. The small membra~e ring formed by the actual membrane 22 which in itself can be easily ruptured because of ~he rigidity of the nipple 24 can be further pro~ided, as desired, with a preferably annular, embossed weakness zone ant that preferably in the iLmediate or clo~ed vicinity of the inner surface of the mouth 180 The replaceable closure 8 is a tightly fitting push-on cap or a screw-on cap having a cylindrical cap mantle 34 and a cap end wall 36. An inner thread 38 is provided on the free-end of the cap mantle 34 ~hich is complementary to and cooperates with the thread 14 on the tube head 6 and seals the tube together therewith when the replaceable closure 8 i8 mounted on the tube head 6. The edge 40 of the - -cap mantle 34 which i8 beveled Oh the inside can cooperate with the shoulder 4 on the tube body 2 to provide a stop arrangement, if desired.
However, it is often sufficient to rotate the threads to the end position. The screw-on cap type replaceable closure 8 has such an axial length that the cap end wall 36 iæ positioned beyond t~e end face 28 of ' .- . i ,, .. .. ,.. ~ ., .~. :
2105~
the nipple 24. A cylindrical guard for the tube which surrounds the nipple 24 and protects it from deformation extends from the cap end wall 36 and even surrounds the cylindrical outer surface of the muzzle 18. A
region of tight fit between the inner surface of the guard 42 and the outer surface of the muzzle can be provided, if desired. Instead of the above described stop arrangement, the end of the guard 42 can be constructed to engage the intermediate portion 16 to stop the rotation of the replaceable closure 8, when fully mounted. The permanent closure 32 is opened by the user by pulling or tilting the nipple 24 (see Figure 6~, whereby the membrane is broken and~or completely ripped out. In the extreme case, the tilting can be carried out by supporting the nipple in a lever type arrangement on the muzzle edge 20 on the tube head 6. A
practically ridge and remains-free ruptured zone 44 (see Figure 7~
remains after rupturing of the fixed closure which no longer or only slightly reduces the free cross-sectional area of the tube muzzle.
The described construction of the fixed closure which is present in the shipping condition of the tube, not only provides for a good hermetic seal for the tube contents prior to use which is easily removable, but also has excellent optical identifying characteristics of an original seal which even from a distance indicates the integrity of the tube when the replacement closure is removed. For the average user, the tube has no unusual optical ha~dling or use characteristicq.
The outer end surface of the replaceable closure 8 can be constructed as a supporting surface 44 to allow storage of the tube on its head when the tube contents are viscous or, in general, when a complete drainage of the tube contents is deqired, since this manner of storage forces the tube contents to flow towards the tube opening. In this embodiment, the ~upporting surface 44 is a plane end surface which contin~es in a curve or bevel 46 into the outer surface of the replaceable closure ~ which is flush with the tube body 2. However, supporting surfaces of any other appropriate construction can also be used.
Claims (20)
1. A tube having a permanent closure which hermetically seals the tube contents towards the atmosphere in the shipping condition of the tube and a replaceable closure which is mountable on the tube for re-closing the tube after opening of the fixed closure, comprising a tube body, a tube head having a discharge muzzle in the tube head, a replaceable closure mountable on the tube head, and a membrane closing the muzzle in the tube head, which membrane is integral with the tube head and made of the same material as the tube head, whereby at least the membrane and the adjoining portions of the tube head are made of a plastic material, the membrane including an opening means for the opening of the fixed closure, the opening means being an integral, outwardly protruding nipple made of the same material as the membrane, which nipple is constructed as a grip, protrudes from the edge of the mouth of the tube head and when the replaceable closure is mounted on the tube head into a recess in the replaceable closure and loosely fits into the recess of the replaceable closure in the shipping condition of the tube.
2. A tube as defined in claim 1, wherein the replaceable closure is a cap mountable on the tube head and the membrane is an integral part of the tube body.
3. A tube as defined in claim 1, wherein the nipple is a hollow body which is open towards the interior of the tube.
4. A tube as defined in claim 3, wherein the hollow body has the same wall thickness as the membrane.
5. A tube as defined in claim 1, wherein the nipple is symmetrical to a longitudinal axis of the tube.
6. A tube as defined in claim 5, wherein the nipple protrudes from the center of the membrane.
7. A tube as defined in claim 6, wherein the nipple takes up to 90% and preferably 80 to 85% of the diameter of the muzzle opening in the tube head.
8. A tube as defined in claim 1, wherein the membrane is provided with a nominal rupture portion, preferably an annular weakened zone, between the nipple and the tube head.
9. A tube as defined in claims 1, wherein the membrane is recessed into the muzzle to a position behind the end of the muzzle.
10. A tube as defined in claim 9, wherein the end of the muzzle is rounded.
11. A tube as defined in claim 10, wherein the rounded muzzle end has a constant curvature and continuous into the recessed membrane.
12. A tube as defined in claim 9, wherein the nipple, the amount of recess of the membrane relative to the mouth end and the three-dimensional positioning of the membrane are selected so that the nipple acts as a pivoted lever which is supported on the muzzle end for rupturing the membrane in an area diametrically opposite the pivot point of the nipple.
13. A tube as defined in claims 1, wherein the replaceable closure is a screw-on cap.
14. A tube as defined in claim 1, wherein the replaceable closure is a push-on cap.
15. A tube as defined in claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, wherein the outer surface of the nipple is provided with a fluted gripping surface.
16. A tube as defined in claim 1, wherein the body of the nipple is cylindrical.
17. A tube as defined in claim 1, wherein the end surface of the nipple is convex.
18. A tube as defined in claims 1, wherein at least the nipple, the membrane and the adjoining portions of the tube head are combined in a single molded part.
19. A tube as defined in claim 1, wherein the whole tube body excluding the replaceable closure is one single molded part.
20. A tube as defined in claim 1, wherein the replaceable closure is a stand for supporting the tube head-down and in an upright position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9212026U DE9212026U1 (en) | 1992-09-07 | 1992-09-07 | Tube with permanent closure and operating closure |
| DEG9212026.1 | 1992-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2105640A1 true CA2105640A1 (en) | 1994-03-08 |
Family
ID=6883495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002105640A Abandoned CA2105640A1 (en) | 1992-09-07 | 1993-09-07 | Tube with fixed closure and replaceable closure |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0586979B1 (en) |
| AT (1) | ATE152415T1 (en) |
| CA (1) | CA2105640A1 (en) |
| DE (2) | DE9212026U1 (en) |
| DK (1) | DK0586979T3 (en) |
| ES (1) | ES2109405T3 (en) |
| GR (1) | GR3024335T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257430B1 (en) | 1997-02-07 | 2001-07-10 | Dental-Kosmetik Gmbh Dresden | Twist-on closure mechanism for container |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3617732B2 (en) * | 1996-07-10 | 2005-02-09 | 大和製罐株式会社 | Retort sterilizable container |
| DE29902258U1 (en) * | 1999-02-09 | 1999-07-15 | Linhardt GmbH & Co. KG, 94234 Viechtach | Tube and locking nipple for such a tube |
| FR2817241B1 (en) * | 2000-11-30 | 2003-03-07 | Cebal | ALUMINUM TUBE WITH SPLITABLE END |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1327190A (en) * | 1917-03-15 | 1920-01-06 | Bigoney Thomas Warnock | Container and process for making the same |
| DE7732972U1 (en) * | 1977-10-26 | 1978-02-09 | Teroson Gmbh | pipette |
| DE8301345U1 (en) * | 1983-01-20 | 1983-07-28 | Cebal Verpackungen | Tube for sensitive filling goods |
| DE8504383U1 (en) * | 1985-02-16 | 1985-03-28 | Bayer Ag, 5090 Leverkusen | Tube-shaped container |
| AT398954B (en) * | 1988-08-18 | 1995-02-27 | Greiter Ag | TUBE |
-
1992
- 1992-09-07 DE DE9212026U patent/DE9212026U1/en not_active Expired - Lifetime
-
1993
- 1993-08-26 AT AT93113691T patent/ATE152415T1/en not_active IP Right Cessation
- 1993-08-26 ES ES93113691T patent/ES2109405T3/en not_active Expired - Lifetime
- 1993-08-26 DE DE59306323T patent/DE59306323D1/en not_active Expired - Fee Related
- 1993-08-26 EP EP93113691A patent/EP0586979B1/en not_active Expired - Lifetime
- 1993-08-26 DK DK93113691.5T patent/DK0586979T3/en active
- 1993-09-07 CA CA002105640A patent/CA2105640A1/en not_active Abandoned
-
1997
- 1997-07-31 GR GR970401980T patent/GR3024335T3/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257430B1 (en) | 1997-02-07 | 2001-07-10 | Dental-Kosmetik Gmbh Dresden | Twist-on closure mechanism for container |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2109405T3 (en) | 1998-01-16 |
| DE9212026U1 (en) | 1992-12-17 |
| EP0586979A1 (en) | 1994-03-16 |
| DK0586979T3 (en) | 1997-09-29 |
| ATE152415T1 (en) | 1997-05-15 |
| DE59306323D1 (en) | 1997-06-05 |
| EP0586979B1 (en) | 1997-05-02 |
| GR3024335T3 (en) | 1997-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |