CN1109015A

CN1109015A - Device for opening a foodstaff parkage

Info

Publication number: CN1109015A
Application number: CN94113290A
Authority: CN
Inventors: 莱福·约恩森; 托米·尼尔森
Original assignee: Tetra Laval Holdings and Finance SA
Current assignee: Tetra Laval Holdings and Finance SA
Priority date: 1993-12-22
Filing date: 1994-12-22
Publication date: 1995-09-27
Also published as: TW271427B; JPH07215354A; KR950017671A; BR9405157A; CA2138321A1; DE4343816A1; EP0663344A1

Abstract

An opening device for a liquid package which is attached to the top of the package is provided with a screw cap and a cylinder jacket shaped supporting ring. In order to improve such a device to the effect that it is easier to manufacture, simpler to open and in no respect affects the quality of sealing of the package,it is provided according to the invention that the cylinder jacket shaped supporting ring is attached to the top of the package by means of a fixing flange externally surrounding an opening disc, is provided on its inner surface with a raised thread and surrounds the external thread of the screw cap formed from plastics material and that a cutter is integrally moulded onto the free edge of the screw cap, which is provided with a front cutting edge which passes at an angle through the free edge.

Description

Device for opening a foodstaff parkage

The present invention relates to a kind of foodstaff parkage opening device, this device is loaded on the top of packing, has a blind nut and a cylindrical sleeve shape support ring.

The device of existing unlatching foodstaff parkage all is made up of the blind nut that a support ring and is twisted thereon, and wherein support ring is arranged in the prefabricated hole of package top.Because of the former of pre-hole self thereby there is sealing problem, it must solve by suitable seal between support ring and blind nut, so this kind opening device will be provided with the failure-free seal fitting inevitably, thereby have to the difficult problem of opening that faces more expensive manufacturing expense and may exist simultaneously.

Device inner had a kind of have in the folder cap of cutter.Yet, to consider to design a kind of special top for this reason, promptly to be provided for the surface of cutter by above-mentioned top, it can be cut wear.Bypass that cutter in the detachable cap are had to a suitable concealed manner setting so that processor and user can not hurt beyond this fact when running into packing, package top also must be limited to plastic wrapping, because have only the bump of plastic cylinder cover shape just may be made by deep-draw.

The object of the present invention is to provide a kind of foodstaff parkage opening device, it makes sealing property simple, that be easy to open and can not influence packing.

Above-mentioned purpose is finished by a kind of foodstaff parkage opening device of the present invention, wherein cylindrical sleeve shape support ring is centered around one by one and opens the top that the exterior attachment flange of circular disc is located at packing, be provided with the screw thread of a protuberance in the support ring and round the outside thread of the blind nut of making by plastic material, cutter are formed on the free edge of blind nut simultaneously, cutting sealing before these cutter have one, it passes through this free edge with an angle.Use this new opening device, before opening, that is to say after filling, in transportation with when storing, all can make packing keep sealing completely, like this, how the profile of opening device can not influence the airtight quality of bag.The major advantage of new opening device also is the variety of its application, not only most plastic wrapping, and open with the also all available this new opening device of packing that the bonded assembly material of paper is done.This new equipment needs out on the position of pour spout after only need being fixedly installed on the top of packing.Usually, the packing of foodstuff all have the surface of plastics, no matter be that whole top is made of plastics or bonding material has a thin plastic coatings.Even but under the situation of the heavy paperboard material that is not capped, the cylindrical sleeve shape support ring of new opening device of the present invention also can be installed by adhesion agent.Attachment flange around the support ring of opening circular disc is used for this purpose.Open circular disc and from the top that will open, be cut out at least in part, just formed the pour spout of packing after cutting open.For brevity, in this manual, be called as this unlatching circular disc with that part of top that forms pour spout by the cutter of new opening device to small part cutting.

Support ring of the present invention does not resemble and comprises an outside thread the prior art, and the blind nut with negative thread of screwing on outside thread, but the screw thread of a protuberance is arranged on the surface within it, and it can be that a single screw thread also can be a plurality of spiral protruding back ofs the body.In the described hereinafter preferred embodiment, roughly the screw thread of the protuberance of 360 ° of extend throughs is just enough to form one on the inside face of support ring.Support ring is preferably used plastic, yet its also available other material manufacture goes up just passable as long as these materials can bond or be installed to the packing top in some other mode.According to version of the present invention, the protuberance screw thread of support ring is round the outside thread of blind nut, and wherein blind nut is preferably made with plastic material.Taking it by and large, need not any special sealing arrangement, opening device of the present invention only is made up of an outer branches pushing out ring, and its inner support blind nut.Blind nut has one downwards towards the free edge at the top of the packing of still closing, and described cutter preferably are integrally formed on it.The manufacturing technology of this cutter is simply and extremely economical.Packing maker can be in enormous quantities, low cost, make this blind nut in short time.Cutter are being made the contact of back discord package top, and promptly in the transportation and storage process before the user unpacks, cutter all have with package top and contact.At first, the purpose that blind nut is screwed in the support ring is that blind nut is maintained on the support ring, and at this moment, cutter are still above the packing top that is not unlocked.In this case, advantageously, according to preamble, cutter have one with the preceding cutting edge of an angle by free edge, cutting edge can be straight or crooked before this, and have towards the degree of dip of blind nut free edge, the user just can be similar to easily and use the such cutting action of pocket knife like this.If the user wishes to unpack really, he only needs along arrow or the indicated direction of other mark blind nut further to be screwed into support ring, makes the preceding cutting edge of cutter and package top engagement just passable.This engagement occurs on any position of periphery of unlatching circular disc of hereinbefore described package top.By rotating blind nut, the preceding cutting edge that is provided with diagonally of the central longitudinal axis of blind nut and support ring moves a segment distance along above-mentioned unlatching circular disc at least relatively, and circular disc is separated from support ring in-to-in package top.Package top just is opened like this, and the user is with regard to pourable article wherein.

In another preferred embodiment of the present invention, the axial height that the pitch of the protuberance screw thread on the support ring and cutter leave free edge along the direction of packing is fitted to each other, when blind nut is turned over about 270 °, and the plane that preceding cutting edge pushes up by packing fully.Preceding cutting edge has certain-length, and it is generally greater than described axial height.Be positioned at the end of preceding cutting edge of outermost and lowest part yes and enter package top at first, and penetrate the top of packing because of the further rotation of blind nut, the subsequent section of preceding cutting edge continues cutting, in the further rotation process at blind nut, preceding cutting edge passes completely through till the package top plane, and this moment, cutting operation stopped, even blind nut further rotates, because preceding cutting edge is arranged in packing fully, promptly below the top, so no longer carry out further cutting operation.When blind nut is transferred to about 270 ° and more during wide-angle, also be this situation, but must not surpass 350 °, so just can make and open circular disc and hang and fall into article atop and not.

Cutter leave the axial height of free edge along the packing direction, promptly leave the height on its top, be positioned on the central axial direction, and highly be the height that records in that this side up, Here it is is referred to as to call the reason of " axial height ".If see blind nut from the vertical section, perhaps from perpendicular to the blind nut central axis laterally see blind nut, package top just is shown as straight line, just as what see along the packing top surface, at this moment the blind nut free edge also is shown as straight line.If towards the front end of the preceding cutting edge on packing top as yet with the engagement of packing top, the blind nut free end from perpendicular to central axial direction, is exactly the height of described cutter from the distance at top.We can say that also the preceding cutting edge of cutter has a component in central axial direction, crossing that surface of the past cutting edge and free edge to the top, the axial component of cutting edge just in time is the size of described axial height before this.

If protuberance pitch of screw thread or the externally threaded pitch of blind nut are greater than the axial height of cutter then better.At this moment, cutter puncture the top required corner are less than 360 ° when the top is passed in the inner of preceding cutting edge from beginning to rotate, and preceding cutting edge inner end is called the end points of part circle cut surface when passing the packing top.The advantage of this measure is that the unlatching circular disc that is cut to or cuts the packing top can not cut from the top fully, just can not fall into the article in the packing yet, but, maintain the unlatching circular disc securely in the failure-free mode as a bridge at the connecting bridge that the reservation one of opening circular disc and its top of encirclement is not cut off.

According to the present invention, because the cutter only periphery of extend through blind nut or the part of free edge are supporting screw thread so guaranteed the reserve part of the periphery of blind nut free edge.Its advantage is, be not arranged in packing because preceding cutting edge meshes the top, if blind nut is further rotated, contiguous screw thread can be caught and open circular disc and make circular disc as the downward folding of a flanging, the zone of opening circular disc like this is empty, so pour spout is unlimited fully.

According to opening device of the present invention, before the cutter cutting, package top complete closed therefore packing is a leak free, the pour spout that forms by the rotation blind nut also is very favourable, because for example turn over about 270 °, when the unlatching circular disc was fully cut, circular disc bent downwards, and therefore disk can not become obstruction when pouring out article.

The present invention also has a further advantage to be, the base portion and that support ring is divided into a tool attachment flange by a default line of rupture have a supporting blind nut rotating element pivot flange shading ring or tear ring off.By these measures; can before open foodstaff parkage, blind nut be screwed into and protect on a position of determining; briefly; promptly remain on the cutter position at top of contact not as yet; this is that the supported flange of rotating element by blind nut supports, and makes it can not be more further rotate and realize to the top.The user at first will tear the rang ring with described support ring or tear ring off by breaking default line of rupture, just blind nut further can be screwed into the base portion that stays then, thereby make cutter pass the top.

By measure of the present invention, also use very easy because support ring is to be made by the plastic material that can be soldered to the top, and on the shading ring or tear off and be formed with one on the ring and be used for shading ring from the limit wing that base portion is torn or tear the wing.Plastic material is the easiest molding, even and complicated structure also can be and make at a low price by injection molded.On one side the wing or the molding of tearing the wing do not have difficulties yet.Default line of rupture also can make things convenient for and be formed on base portion and shading ring reliably or tear off between the ring, and to have the technology at the top of a frosting at least also be known and opening device is connected to one.Therefore, according to opening device of the present invention can be simply, convenient, and place reliably on the packing, so just can tear shading ring and unpack by flap.

In first preferred embodiment of the present invention, cutter have the packing one day and give prominence to, cross the cusp of free edge towards packing downwards.At this moment, previous described axial height is exactly now from the blind nut free edge, along the measured distance to this point of central axis of this point of cutter.It is very favourable with the plastic material identical with the rotating element of blind nut this cutting blade being moulded on blind nut, and they have just fused like this.

In this case, when blind nut have one radially bigger, and when placing the rotating element of an externally threaded cylindrical shape outshot radially less, that have a trapezoid cross section thereon, and when being sharp outside free edge at least a portion at its periphery of blind nut, it also is very favourable making sharp like this outline be positioned on the surface that forms the outside thread base portion.Plastic material, paper and have the paper of coating and other bonding material also can cut in mode described herein with this cutter, thus an opening device formed.Hollow circle tube screw thread outshot can be made its net shape with the injection moulding mode.In addition, can also make outside thread be configured as a trapezoid, perhaps point the free edge of hollow cylinder screw thread outshot in this way by rotating the symmetrical processing component of rotation.In the embodiment of the cutter that adopt plastic material, the convenient manner of the available this rotary processing of cutter itself is made.

Although for example cutting tool is just like the preceding described knife edge that is used for bonded assembly or paper material, and make it to be shaped in an injection moulding mode easily, but cutter can be made to such an extent that be used for plastic material, make that the preceding cutting edge of cutter is arranged on the externally threaded outer bump of blind nut according to the present invention.Preceding cutting edge is preferably straight.If a conical surface is the conical surface of a throw for example, then can cut the hollow cylinder screw thread outshot of making by plastic material as follows, be that the line of cut passes through externally threaded outshot and crossing with it, so just can just form the preceding cutting edge of cutter always, not form cutting knife and adopt the injection moulding measure again and be not required to be at bump outside blind nut externally threaded.

Skilled person in the art is appreciated that and adopts described embodiment can obtain an opening device that is used to pack that before being opened, it not only can not influence the sealing of packing in any case, and can open easily, even reclosable.

By below in conjunction with the description of accompanying drawing to preferred embodiment, can draw further advantage of the present invention, feature and possibility of its application, wherein:

Fig. 1 is the partial lateral of first embodiment of opening device before opening and the view of part vertical section.

Fig. 2 is the schematic partial sectional view by blind nut;

Fig. 3 is the dextrosinistral planar view of blind nut shown in Figure 2;

Fig. 4 is the view identical with Fig. 1, wherein, after tearing shading ring off, blind nut is screwed into enough degree of depth downwards by the internal direction along packing, so not only can carry out about 270 ° cutting, and can bend downwards in the mode of a flap along the circumference periphery of circular disc;

Fig. 5 is the planar view at top, wherein circular disc process cutting, but do not bend downwards or K/UP, a base portion also is shown among the figure simultaneously;

Fig. 6 be one with the similar view of Fig. 1, it shows another embodiment;

Fig. 7 is the longitdinal cross-section diagram that passes through the blind nut of second embodiment as shown in Figure 6, and its method for expressing is similar to Fig. 2.

See also Fig. 1, one only schematically and the supposition of the flexible package punch 2 that illustrates partly be on the flat top 1, by attachment flange 5, the 6 relative central axis 3 circle symmetrical plastics side support rings 4 of having burn-on.This support ring 4 is by base portion 7 and tear ring or shading ring 8 is formed, the line of rupture 9 that they are established by the top that is parallel to top 1 and spaced-apart.Shading ring 8 is provided with the pivot flange 10 that extends radially outwardly at its top, and has and tear the ring wing 11 and be welded in ring the right of 8.

On support ring 4, more particularly, on the rounded internal surface 12 of pedestal part 7, have one to extend 360 ° protuberance screw thread 13.

Blind nut 41 is made up of a radially bigger radially less comparatively speaking outshot with screw thread 15 of rotating part 14 and, the latter is a hollow cylindrical body, its radius is significantly less than the radius of rotating part 14, the outside thread 16 of threaded outshot 15, the outside thread 16 of blind nut 41 just, be coupled in the annulus 13 in rotation ingear process, the outer peripheral edges of rotating part 14 then are coupled in the pivot flange 10, are seated in that this is flat, on the gimbal.

Be provided with cutter 18 on the free edge 17 of blind nut 41, these cutter have preceding cutting edge 19 always, and 17 distances to 1 the least significant end 20 towards the top are called the axial height H of cutter 18 along central axis 3 from free edge.

In first embodiment of Fig. 1 to 5, the front end 20 of preceding cutting edge 19 is made into the shape of the knife edge 20, and these cutter 18 are used for cutting the material that comprises papery.In the embodiment shown in Fig. 6 and 7, the front end 20 of cutter 18 is more flat, is used for cutting the top 1 of being made by plastic material.

Cutting is to carry out on the outer peripheral edges of as shown in Figure 5 unlatching circular disc 21, and this opens circular disc 21 be circular, and is cut along line of cut 22, and cutting angle is 270 °.Shown in Figure 5 is has been cut but has not had the K/UP or the unlatching circular disc 21 of folding downwards, and it is still connected by base portion 7 and attachment flange 5.The inner most surface of protuberance screw thread 13 is expressed as a circle 23 in the drawings, on this circle 23 sightless cutter among Fig. 5 is arranged, because blind nut 41 also is not screwed in Fig. 5.

Fig. 1 and 6 shows the opening device before unlatching, at this state, the front end 20 or the knife edge of cutter 18 do not contact with the top as yet, this is that working in coordination of height by the axial length of the threaded outshot 15 of hollow circle tube and support ring 4 guarantees, the front end 20 of firmly depressing cutter 18 by force is impossible, because radially bigger rotating part 14 is maintained in the pivot flange 10 of support ring 4.

During unlatching, the user catches and tears the ring wing 11, tears shading ring or tears ring 8 along default circular line of rupture 9.Like this, blind nut 41 just can further be rotated by clockwise direction, and threaded outshot 15 with cutter 18 1 is moved along being directed downwards towards the top of central axis 3, like this, the knife edge of cutter 18 or front end 20 just may pass the top, for example, pass the top at point 24 places shown in Figure 5.When blind nut 41 along curved arrow 25(cw) when direction is further rotated, before cutting edge 19 turn over as shown in Figure 5 3/4ths circumference 22 along the circular periphery of opening circular discs 21, till point 26, along this figures between the

point

24 and 26, before cutting edge 19 to penetrate the top more and more darker, until preceding cutting edge 19 in, just stop to cut on the point 26 of rearmost end 27.If user after this along the direction of arrow 25 continue rotation a little, preceding cutting edge also no longer cuts, because it has inserted the inside of packing, is positioned at the below of top plan.And, adjacent threads has as shown in Figure 4 guaranteed the only 21 crooked acute angles that also are converted at least in part of the unlatching circular disc shown in the part in Fig. 4, if after this, that is to say after making pour spout, the words of back-outing blind nut 41, pour spout is exactly unimpeded, and the user can just pour out article wherein.

Claims

1, a kind of opening device that is used for foodstaff parkage, described device is installed on the top (1) of packing, have a blind nut (41) and a cylindrical sleeve shape support ring (4), it is characterized in that, described cylindrical sleeve shape support ring (4) is centered around the unlatching exterior attachment flange of circular disc (21) (5) by one and is installed on the package top (1), and the inside face (12) at support ring 4 is provided with a screw thread (13) that swells, and described support ring (4) is around the outside thread (16) of the blind nut of being made by plastic material (41); On the described blind nut (41) integratedly molding one cutter (18) are arranged, described cutter have one with the preceding cutting edge (19) of an angle by free edge (17).

2, opening device as claimed in claim 1, it is characterized in that, the pitch of the protuberance screw thread (13) on the described support ring (4) and cutter (18) axial height (H) from free edge (17) on the packing direction is fitted to each other so that described (41) when turning over about 270 ° before cutting edge (19) pass through the plane of package top (1) fully.

3, opening device as claimed in claim 1 or 2, it is characterized in that, described support ring (4) by a default line of rupture (9) that is parallel to attachment flange (5) be divided into a base portion (7) and with attachment flange (5) have the rotating part (14) that holds on blind nut (41) pivot flange (10) shading ring or tear ring (8).

As the described opening device of claim 1 to 3, it is characterized in that 4, described supporting ring (4) is made by the plastic material that can be soldered on the described packing top (1); One described shading ring or tear ring (8) and go up molding and be useful on shading ring or tear ring (8) and encircle the wing (11) from tearing of tearing of base portion (7).

As the described opening device of claim 1 to 4, it is characterized in that 5, described cutter (18) have the knife edge (20) that extends through free edge (17) downwards and point to described packing.

6, as the described opening device of claim 1 to 5, it is characterized in that, described blind nut (41) has a radially bigger part (14) and a position outshot (15) radially less, best hollow circle tube band outside thread (16) thereon, and the outside thread of described outshot 15 (16) has the trapezoid cross section; Periphery to the small part of the free edge (17) of described blind nut (41) is sharp, and this sharp outline (19) is positioned on the surface of the base portion that constitutes outside thread (16).

As claim 1 to 4 and 6 described opening devices, it is characterized in that 7, the preceding cutting edge (19) of described cutter (18) is arranged in the outer bumps part of outside thread (16) of described blind nut (41).

8, opening device as claimed in claim 1, it is characterized in that, the pitch of the protuberance screw thread (13) of described supporting ring (4) and cutter (18) axial height (H) along the packing direction from free edge (17) mates with each other, so that blind nut (41) described preceding cutting edge (19) when rotating about 270 °-350 ° passes completely through the plane at the top (1) of packing.