DE1532532A1 - Closing head for attaching closing lids to containers - Google Patents

Description

Thomas Hunter Limited, Rugby, Warwickshire, England

Closing head for attaching caps

Containers.

The invention relates to the application of with a rim provided closure lids on containers, such as jam jars or the like. Which around the Container mouth have a retaining profile against which the lid edge in the course of the closing process to Formation of a Poraschlusßes is pressed. Closing heads for performing this deformation of the lid edge directly on the container itself are already known.

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In contrast, it is the object of the invention to provide a closing head of the ./effect.veise with a new body, the production and maintenance costs of which are significantly lower than with the previously known locking heads. In detail, a closing head of the aforementioned type is to be created, which has an extremely small number of moving parts and is easy to keep clean, especially as far as those areas are concerned, which are directly in get close to the container mouth and consequently easily through the container contents, for example jam or the like., can become dirty.

In its simplest form, a closing head usually takes the form of a ring or a metal u'll ^ e, the inner surface of which is provided with suitable 7or, ';pr':ni.; En, by means of which the lid edge is attached to L s '', irr; ·: ί; οη places along the circumference of the lid inwards gear ';.; /: tv / should be earthed. This ring or this sleeve is us! After the dachshund is placed on the container mouth, it is simply pushed over the lid and, due to its special dimensions, presses the v / ulst on the lid edge:

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container mouth. As already mentioned, this outer wall can have a geoimetes holding profile, which cooperates with the De eic eirund bead and in turn the shape of a simple one surrounding the container mouth V / ulstes has. This relatively primitive form of a Closing head does not work very satisfactorily, however, because of the dimensions of the to be closed Containers have to adhere to strict tolerances, especially when it comes to glass vessels. For example, if the mouth of the container is slightly oversized or the container mouth is not precisely circular so that its diameter is larger in one direction than is permissible, when inserting the container mouth together with the closure placed on it Broken lid in the sleeve part of the closing head of the glass container.

In order to overcome this difficulty, resilient elements have generally been arranged in the closing head. These can be in the form of pressure fingers. Regardless of the particular shape of the spring elements used, however, these closing heads generally work such that first the closing head with reference

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is aligned with the lid placed on the container mouth, .before a device comes into operation, '.velclie certain parts of the closing head are moved radially inwards so that they press the lid edge, -this device has the necessary spring properties must have. Thereafter, the movement carried out is reversed, so that the lid is ψ released and the sealed container of dom closing head retracted v can sraen /. In certain cases, the part of the closing head that comes into contact with the container lid is also in the form of a rubber sleeve, the inner diameter of which is greater than the outer diameter of the lid and which in turn is pressed inwards for the purpose of pressing the lid edge inside.

It is also known to equip a closing head with elements that act resiliently on the container lid, without actuating devices for moving these elements radially inward. In this case the locking head is more like the primitive locking head design described above, but with the difference, that now the metallic sleeve with longitudinal slots

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is provided, which divide this sleeve into a wreath of cantilever-like pressure fingers. The container mouth with the lid placed on it is then reinserted into the sleeve part of the closing head, which is tapered in such a way that the relevant Container lid in a certain movement & phase the pressure finger rests on the inside of the wreath. The further movement of the lid into the sleeve part leads to that the pressure fingers are urged outwards and a corresponding, radially inwardly directed counterforce Exercise on the edge of the lid, creating the desired locking effect. This kind of locking head, too does not work satisfactorily because of the lack of an actuator to release the Lid made of the deforming elements of the closing head there is a risk that the lid will come back when the container in question is removed from the closing head is deducted.

All these difficulties are now overcome by means of the closing head according to the invention, which works extremely satisfactorily.

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The invention is based on a closing head iiun of hand-provided locking lids - '; uf along the mouth H'ilteprofile on v / iron BeLhI υ ·; ΐ · from, which with an inner hollow cone-like shape-in, annular sleeve part ao.vie with an actuating device to generate an axial relative movement between the sleeve part and the one to be closed Container attached closure lid is to be provided, by means of which its lid rim l'orrrischlüssig pressed against the container. The .- ^ rui. Additional Structure of the closing head according to the invention thus resembles the primitive shape of the closing head described at the beginning.

The above task will be exactly the; 2rf solved by the ring-shaped helical part consists of a tough, resilient plastic.

This plastic adapts itself to deviations in the band of the container mouth, of the sleeve profile located thereon at. Plastics suitable for the stated purpose preferably have a coefficient of friction opposite. "etali. Here, in particular, are Hylori and

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Polytetrafluoroethylene as particularly suitable see below

The essential advantage of the closing head e.: ± l ± n lor.-irtic'sr Jchloßvor &i'n ^ would, if he nusq-efüiirted by means of a rigid LIeti 11-H'ilsteiles -, would, be ^ 'i ^ licli of the dimensions of the thread lead to almost insurmountable difficulties, since in those places where the thread runs under the lid bead, this edge bead between the thread and the closing head itself is inevitably squeezed out. This ago ^ '- number of ^Zusammendr: ckunc found in normal 3ehält <-> rn on the type de - Mariiieladegläser which Ulst around the Behälterniindung have a jl "ichförniGen V /, non-st-tt because of the latter case Edge bead is simply pressed inwards below the container mouth bead. In contrast, by means of a closing head according to the invention, which is equipped with a sleeve part made of Ilylon or a similar material, a sealing lid provided with a beaded edge can be applied to containers which have multiple screw threads.

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point. Application to containers is also possible continuous screw thread as well as on containers in the manner of normal jam jars.

Another major advantage of a closing head according to the invention consists in the easy interchangeability -or- interchangeability and the extraordinary low cost of the essential part that comes into contact with the sealing cap, in addition, can also closure lids can be applied in a simple manner, which deviate from the circular shape. The interior lining the sleeve part according to the invention can be smooth or provided with suitable teeth, that the lid on certain, spaced apart Adjusting the circumference of the lid is pressed inwards ο For container mouths with a circular cross-section the sleeve part made of plastic preferably has essentially the shape of a hollow cylinder, whose light widens conically on one side.

In the following, the invention is illustrated by means of some embodiments with reference to the enclosed

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Drawings described for example. In the drawings show:

Figure 1 is a partially sectioned side view of a locking head according to the invention and a container to be closed,

Figure 2 is a perspective view of the

lower end of a closing head sleeve part according to the invention and '

Figure 3 ■ a similar perspective view another embodiment of a closing head sleeve part according to the invention.

The closing head according to the invention has a spring-loaded pressure plate 1, which is arranged at the lower end of a stamp 2 and for holding one with a beaded edge (this beaded edge can inwardly

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or rolled outwards) provided locking dachshund, 3 - on the mouth 4- of a ■■■ glass container a during a .7er 3, in front of the whole-serves ·· In addition, the locking head is a tubular piece 5 ' iuf, on the lower part of which a sleeve part-'7 made of liylon.beafreaindes is spun on by means of a screw socket 6. This Hülsonbail has at its upper end a sohraubmuffe 5 "cooperating with dex * and is funneled at its lower end 3 funnel-ji ^ <for the purpose already mentioned above. During the closing process, the locking head slides via the 3ehülterm ^; .bnung ^Z K (or the container is moved upwards).

Hierbai first presses the pressure plate Ί onto the cap 3 and holds it on the container, whereupon the punch 2 recedes during a further downward movement of the closing head, so that the sloping parts of the 'sleeve part 8 Diber the' / erschluß-; ■ ceiling irand ^ '- ^^ 3 can slide Durcii · more ^ ^ -i Vorwartsbe ⁷ 7 / ath.' of the closing head it comes gegebanenfails the loading ■: ■; ■? n> rich S- des ifllsenteiiesmi ^ dem Bördaliaimd · 9- des. ¥ er ^ ..; - I closing cover ih touch, so-'that- -this Bö'rdelrand. ^. with a subsequent lowering'. ^ s' Closing head. "

due to the wedge effect of the sleeve part radially inwards pressed v / ird. There, v / o the screw thread 10 of the Bell al term '.radung runs under the flange 9, is the latter pressed flat, while he bent in the other places under the overlying threads will.

In Figure 2 of the drawings, the lower part of a sleeve part is shown similar to the sleeve part 7 according to the figure of the drawings, which has a SahnuiiG 11 in the area 8, while Figure 3 of the drawings shows such a sleeve part in which these teeth are missing. A sleeve part according to Fig. 2 of the drawings can be used, for example, ¹ to apply a Versehlußdeckis on a smooth jam smooth with a bead around the container mouth, so that the beaded edge of the closure lid inward only at certain points spaced apart from each other on the circumference of the lid is pressed. The resulting toothed arrangement of indentations facilitates the removal of the closure cover (in the case of a so-called "pry-off" closure cover) compared to a cover closure in which the entire

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Beaded edge is pushed under the beaded edge. Simultaneously the toothing profiles facilitate ventilation of the closure cover to a certain extent during of the process.

The closing head according to the invention can relate to the surfaces acting on the lid to be applied not only have small irregularities in the container mouth adapt, but can also be withdrawn from the attached and closed lid are without this being removed from the relevant, just closed container again, wherein at the same time there is a risk of damage to a possibly located on the cover in question Order or imprint is significantly reduced. The nylon sleeve part (and the same applies of course for sleeve parts made of plastics with similar mechanical properties) has a certain, but limited Extensibility in the circumferential direction, which means that there is a certain oversize of each to be closed Container neck in which normally as a tolerance deviation can adapt to the expected degree «In addition, however, it is a characteristic property of the

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Mylon sleeve part that relatively low forces are necessary to bring the same into a form slightly deviating from the normal form, without doing so significant changes in scope arise. From the manufacturing process For glass containers it turns out that the most common and most pronounced error is a troughness or ovality of the container, although the The circumferential length of the container mouth is more or less dimensionally stable, while the diameter in a Direction is larger and smaller in a direction substantially perpendicular thereto. In this case they are circumferential tensions of the I ^ rlon sleeve part in all parts of the same essentially the same, even if this sleeve part over one to one up to A certain degree of faulty container mouth is pushed onto the lid. The corresponding to Deformation of the lid rim bead required and forces acting against the glass wall, which are caused by the radial components of the mentioned peripheral stresses are formed, are therefore also along the entire circumference more or less the same size. With a rigid sleeve part and also with a sleeve part from individual spring-loaded In contrast, these forces are pressure fingers

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a function of the prevailing at a given point Durohameter differences between the sleeve part on the one hand and the container mouth on the other hand. In this case, the maximum forces can therefore be the permissible Exceed values, so that it comes to glass breakage, while on the other hand not even the smallest forces can be sufficient to deform the lid rim bead.

The advantages of the locking head according to the invention just described occur in particular when used in connection with containers and lids, which intentionally have an oval mouth cross-section, since in this case it is even more difficult to produce the glass container, the exact oval Maintain shape than is the case with containers with a circular mouth cross-section. The more elongated In addition, the container is oval, the greater the bending moment that is created in the container edge by the im Area of the smaller axis of the oval v / acting radial force is generated, so that such containers are significantly more fragile for this reason. The advantage a simple and M-IIigen structure of the invention

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proper closing head is also of particular value in application to containers and lids, which are on purpose oval or otherwise of circular cross-section are designed differently. Closing heads made of metal for such shapes of the container mouth are very expensive to manufacture and it is very difficult to to adhere to the required tolerances, so that additional problems with this type of container closure * On the other hand, locking heads can occur are made relatively easy according to the invention for such containers and these closing heads work significantly more reliable in operation.

The dimensions of the sleeve part and the hardness of the The material used depends of course up to to a certain extent on the wall thickness of the to be applied Lid and the wall thickness of the one to be closed From the container. In general, however, all plastics which have similar mechanical properties are suitable like nylon.

While the locking head according to the invention above in Disgusting connection with the application of closure

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has been described with an a beaded edge, the Invention ■ also for applying lids with corrugated Hand ("crown cork cap"), for example Aluminum, find use.

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Claims (1)

Claims 1 »Closing head for applying edged Closing lids on retaining profiles along their mouths having container, with a hollow cone-like inside trained, annular sleeve part and with a Actuating device for generating an axial relative movement between the sleeve part and the closure lid placed on the container to be closed, by means of a soft whose lid edge is pressed positively against the container, characterized by ».. that said sleeve part (7) consists of a tough, resilient Made of plastic. 2. Closing head according to claim 1, characterized in that that the sleeve part (7) "made of nylon or polytetrafluoroethylene consists" 3. Closing head according to claim 1 or 2, characterized in that that the sleeve part (7) has a smooth inner wall has (Figure 5). '4. Closing head according to claim 1 or 2, characterized .- ■ _ ■■ '■■ -_ ■ "" ■ -; ■. rs ■ ■ ". '■ - .." _ ■' ■ ■ _ - 17 -
901886/0 091 draws that the interior of the sleeve part '?) with a tooth bz;?. Zigzag profile (11) is provided, ά ·· ίΙ the lid edge is pressed inward during the closing process at starry, spaced apart points of the Unf ^ n.-ea ni-Qh (Figure 2). 5 · Closing head according to one of claims 1 to 4, characterized characterized in that the sleeve part (7) in the .vealichen has the shape of a hollow cylinder3, the light of which 3 It widens conically on one side (8). 6. Closing head according to one of claims 1 ois 5 »characterized in that the plastic sleeve part (?) Is held in an outer metal ring (6), which the sleeve part outside only up to a certain axial distance from the conical sleeve mouth (8) located ' 3telle surrounds (Figure 1). - 18 - 909886/0099