US20070187408A1 - Receptacle comprising a lid - Google Patents

Receptacle comprising a lid Download PDF

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Publication number
US20070187408A1
US20070187408A1 US11/660,120 US66012005A US2007187408A1 US 20070187408 A1 US20070187408 A1 US 20070187408A1 US 66012005 A US66012005 A US 66012005A US 2007187408 A1 US2007187408 A1 US 2007187408A1
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US
United States
Prior art keywords
shell
holding
sheath
form tool
edge
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
Application number
US11/660,120
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English (en)
Inventor
Hans Franzen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huhtamaki Alf Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG
Original Assignee
Huhtamaki Alf Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huhtamaki Alf Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG filed Critical Huhtamaki Alf Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG
Assigned to HUHTAMAKI ALF ZWEIGNIEDERLASSUNG DER HUHTAMAKI DEUTSCHLAND GMBH reassignment HUHTAMAKI ALF ZWEIGNIEDERLASSUNG DER HUHTAMAKI DEUTSCHLAND GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRANZEN, HANS
Publication of US20070187408A1 publication Critical patent/US20070187408A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0225—Removable lids or covers without integral tamper element secured by rotation
    • B65D43/0231—Removable lids or covers without integral tamper element secured by rotation only on the outside, or a part turned to the outside, of the mouth of the container
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/00351—Dome-like
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00953—Sealing means
    • B65D2543/0099—Integral supplemental sealing lips

Definitions

  • the invention relates to a top shell and a bottom shell made from a deep-drawn molded plastic part as well as a receptacle, which is composed of the two joined shells.
  • the invention also comprises a method and a device for producing a top shell or a bottom shell.
  • Such receptacles serve to store and transport small parts of all sorts, in particular food, such as for example cream cheese, yogurt, and the like, and with the latter also comprising salad compositions provided with dressing or to which dressing remains to be added.
  • a receptacle of a different type produced therein by injection molding is disclosed in U.S. Pat. No. 5,638,976.
  • the injection molding process offers the advantage that the containers can be produced in a greater number of varieties with regard to their geometry. The disadvantage of this production process lies in its relatively high production costs per item.
  • a receptacle produced from a deep-drawn plastic material with two halves that can be screwed to each other is described in U.S. Pat. No. 3,322,262.
  • the first half is provided with an exterior thread and the second half with an interior thread for a screwed connection.
  • this structural design with two complementary adjusted threads requires an expensive production process.
  • the seal of the receptacle screwed together is solely implemented by the connected threads, which leads to considerable leaks due to the unavoidable irregularities resulting from the deep-drawing method. This is particularly unacceptable for packaging food.
  • Conventional resealable receptacles for example for yogurt, using a closing or sealing means as simple and cheap as possible, comprise a bottom shell with a corresponding top shell, with the top shell in the area of the opening edge comprise a so-called lid apron with snapping elements, which engage below the edge of the shell.
  • the lid aprons When opening the receptacle the lid aprons are pulled over the opening edge.
  • the lid apron must be engaged from below and the snapping connection must be loosened, in order to lift the lid. This is not only awkward, but it also presents the risk that the fingers come into contact with the content of the receptacle.
  • the invention is based on the object to provide a first and a second shell, which can be produced cost-effectively as disposable units, on the one hand, and on the other hand, allow a largely tightly sealed container by connecting a tight but easily separable lock.
  • Additional partial objects comprise the development of a method and a device for producing the first shells.
  • a first shell for example a lid shell
  • a mounting means being arranged for creating a threaded connection
  • the mounting means comprising a reducing collar embodied between the holding edge and the pot-type central part and at least two threads arranged on the inside of the holding edge having the same incline, with the reducing collar limiting at least two threads on one side and the at least two threads each having an open thread inlet.
  • Each thread is limited by the reducing collar like a flange, so that in the transitional area from the thread to the reducing collar a conically merging wedge is formed, in which elements of a second shell cooperating complementary to the thread are fixed by a clamping action.
  • the reducing collar is embodied circularly with a constant width.
  • the threads are each arranged diametrically.
  • the threads are provided with an incline ranging from 5° to 30°.
  • an incline ranging from 5° to 30°.
  • the first shell may be provided with a seal.
  • the seal may for example be embodied as a concentrically encircling sealing edge on the bottom of the first shell between the pot-type central part and the reducing collar.
  • the sealing cone is supported on the second shell at its transitional area from the opening edge to the interior wall and thus creates a sealing effect.
  • the encircling sealing cone this may also be waived and a sealing sheeting may be welded to the opening edge.
  • the second shell is provided with a cup wall, which is embodied at its upper section with a circular opening edge and in its lower section it is permanently closed by a bottom plate.
  • a fastening means for creating a threaded connection is arranged at the second shell, with the fastening means comprising at least two radially protruding stiff holding wings at the circular opening edge.
  • stiff used here is defined as a stiffness allowing a functionally appropriate opening and closing of the second shell without any reversible or irreversible deformation of the holding wings.
  • the holding wings of the second shell cooperate with the threads of the first shell such that the holding wings in the connected state protrude into the threads and the first and second shells are mutually guided during the rotary motion.
  • the essential advantage in reference to the known threaded connection lies the fact that a complex thread, complementary to the thread of the first shell, can be waived on the second shell, which considerably reduces the expense during production.
  • the holding wings shall be arranged diametrically around the opening edge. This, together with the holding wings also being distributed evenly over the circumferential direction, achieves a surface pressure evenly distributed over the circumferential direction between the first and the second shell. This contributes to a good seal and prevents an unintended separation of the top shell from the bottom shell.
  • the holding wings are provided with a front and rear edge extending radially in reference to the second shell, which are connected to each other via exterior edges arced concentrically in reference to the second shell.
  • the holding wings may also provide a front edge extending radially in reference to the second shell and a convexly arced rear edge.
  • the holding wings It has also proven advantageous for the holding wings to be formed from a holding surface protruding rectangularly or squarely from the opening edge.
  • holding wings may also be formed as holding cams.
  • a resealable receptacle comprising a first shell and a second shell that can be mounted thereto with a reducing collar being embodied between the holding edge and the pot-type central part, and by which the first and the second shell can be screwed together via a threaded connection, with the thread connection at the first shell, on the inside of the holding edge having at least two threads of identical incline, limited on one side by the reducing collar, and having an open thread inlet each, and at the second shell comprising at least two holding wings protruding radially from the circular opening edge.
  • Combining the first shell with a second shell creates a largely sealed receptacle. Being a complementary component to the above-described at least two threads they are engaged by radially protruding holding wings arranged at the second shell.
  • the number of holding wings is smaller or equal to the number of threads. This facilitates the connection of the first to the second shell without holding wings blocking the corresponding thread and causing a blockage during threading.
  • At least two threads are provided with a width larger than the holding wings in the circumferential direction of the holding edge. This allows a secure introduction of the holding wings into the respective threads particularly in the inlet area of the threads.
  • the first shell can be provided with a nominal diameter slightly larger than the full-circle diameter of the holding wings in the area of the holding edge and between the opposite threads.
  • first shell may be provided with an interior diameter slightly larger than the exterior diameter of the opening edge in an area between the thread cams of the threads.
  • the first shell By the larger interior diameter of the holding edge in reference to the opening edge the first shell is allowed to grab over the second shell.
  • the interior diameter in the area of the threads should only be selected slightly larger than the full-circle diameter of the holding wings so that an overlapping as much as possible develops between the flank of the respective thread and the holding wing guided therein.
  • the partial object is attained in a deep-drawing process, using a form tool with a torque-proof arranged holding sheath and a threaded sheath pivotal in the circumferential direction in reference to the holding sheath, in which first in an original position of the holding sheath and the threaded sheath a sheeting is moved over the form tool, the sheeting is entered into the form tool in order to form a first shell, clamped, and formed, the threaded sheath is brought into the end position by spindling, and the shell is removed from the holding sheath.
  • the method according to the invention relates exclusively to the forming process for producing a shell comprising a thread, for example a top shell.
  • the sheeting After positioning the sheeting over the form tool the sheeting is preferably impinged on its upper side with pressurized air and molds to the form tool.
  • the shell is formed with threads.
  • the threaded sheath is spindled off. This is a process similar to a nut and bolt, with the nut representing the first shell and the bolt being the threaded sheath. By screwing the bolt out of the nut and/or the threaded sheath out of the first shell the threaded sheath loses its contact to the first shell and thus releases it so that the first shell can be lifted upwards off the form tool.
  • the shell is held by the holding sheath and/or the sheeting during the spindling off.
  • the first shell it is possible for the first shell to be fixed exclusively via the sheeting during the spindling off, in order to prevent that the shell rotates together with the threaded sheath.
  • this is particularly problematic in soft or thin materials, because the sheeting cannot compensate the forces occurring during spindling off and deformations develop at the first shell. For this reason it is advantageous for the first shell also to be held at least additionally by the holding sheath.
  • the shell can be removed off the holding sheath together with the sheeting.
  • the sheeting molded into the first shell is fed to another conventional punching machine and the shells are separated from the sheeting.
  • a concentric molding even more precisely in quality can be achieved when the shell is already punched on the form tool prior to spindling the threaded sheath off the sheeting.
  • the first shell may be fixed against rotating with the threaded sheath exclusively by the holding sheath, because prior to spindling off it has already been separated from the sheeting.
  • the holding sheath is provided with a geometric structure, which is formed complementary in the first shell after the molding process and allows a form-fitting transfer of force.
  • the first shell is punched off the sheeting only partially and to leave residual bars between the sheeting and the shell.
  • This process relates to hoop-steel cutting.
  • forces are still compensated by the sheeting during the spindling off and still very precisely concentrated parts are produced.
  • the residual bars are broken in the subsequent stacking process.
  • the lower production costs in reference to blanking are an essential advantage.
  • a disadvantage in reference to blanking lies in the potentially remaining bars not completely broken off having dangerous cutting edges.
  • the third partial object is attained in a form tool for producing a first shell with a fixed holding sheath and a threaded sheath pivotal in reference to the holding sheath in the circumferential direction out of the original position into an end position, with contours being embodied in the threaded sheath for forming at least two threads.
  • an interior die is arranged centered inside the holding sheath.
  • the interior die serves to form the interior pot-type central part and can be displaceable in the axial direction in a particular embodiment alone or together with the holding sheath. Based on the ability for displacement it is possible to lift and remove the first shell off the form tool after the threaded sheath has been spindled off.
  • the threaded sheath is arranged concentrically around the holding sheath so that the threaded sheath rotates symmetrically around the holding sheath during spindling off.
  • the holding sheath should be located at the inside and the threaded sheath at the outside.
  • the holding sheath is provided with an inclined wall section in which holding ribs are arranged.
  • the holding ribs can be aligned in the axial or radial direction of the holding sheath.
  • the holding ribs shall be aligned perpendicular, if possible, to the rotational direction of the threaded sheath, so that a torque resulting from the pivotal motion of the threaded sheath unto the shell is compensated by the holding ribs.
  • the holding device may comprise, for example, a fixed punching thrust bearing and a holding plate that can be lowered.
  • a holding and punching device may be arranged around the threaded sheath.
  • the blanking can be preformed particularly advantageous using a holding and punching device, which comprises a separating plate, a cutting plate that can be lowered, and a fixed knife sheath concentrically surrounding the threaded sheath, with the separating plate and the knife plate being displaceable in the vertical direction.
  • a holding and punching device which comprises a separating plate, a cutting plate that can be lowered, and a fixed knife sheath concentrically surrounding the threaded sheath, with the separating plate and the knife plate being displaceable in the vertical direction.
  • the knife sheath is arranged between the threaded sheath and the separation plate.
  • the sheeting is clamped between the knife plate after it has been moved over the form tool. Subsequently to the forming process and after the threaded sheath has been spindled off said sheath is moved upwards and thus cuts the sheeting with the knife plate.
  • the holding and punching device may comprise a punching thrust bearing, a holding plate that can be lowered, and a hoop-steel knife that can be lowered to the punching thrust bearing.
  • the hoop-steel knife comprises a unilaterally or bilaterally sharpened steel band, which is circularly closed in the circumferential direction and embodied with recesses for accepting residual bars on its sharpened bottom.
  • the holding plate for holding the sheeting and the steel band knife are here two separate structural parts so that each worn steel band knife can easily and individually be exchanged. Here, particularly advantageous production costs are possible.
  • Ventilation bores are arranged in the holding sheath.
  • the form tool is usually impinged from above with pressurized air so that the sheeting molds to the form tool and accepts a cup shape. This molding is supported by the ventilation bores. It is also possible to connect a vacuum line to the ventilation bores and to suction the sheeting to the form tool.
  • the threaded sheath travels distance from 10% to 25% of its circumference between the original and the end position.
  • FIG. 1 a perspective exterior view of a first shell being a top shell with an encircling sealing cone;
  • FIG. 2 a side view of the first shell according to FIG. 1 ;
  • FIG. 3 a cross-section of the first shell according to FIG. 1 ;
  • FIG. 4 a partially enlarged cross-section of the holding edge, reducing collar, sealing cone, and pot-type central part of the first shell embodied as a top shell;
  • FIG. 5 a perspective exterior view of a first shell embodied as a top shell without a sealing cone
  • FIG. 6 a perspective exterior view of a first shell embodied as a top shell with an exclusively interior ruffled structure
  • FIG. 7 a perspective exterior view of a second shell embodied as a bottom shell with symmetrically formed holding wings;
  • FIG. 8 a top view to a second shell according to FIG. 7 ;
  • FIG. 9 a side view to a second shell according to FIG. 7 ;
  • FIG. 10 a top view of a second shell embodied as a bottom shell with asymmetrically formed holding wings
  • FIGS. 11 a - c a partial cross-section through a form tool in various functional positions
  • FIGS. 12 a - c a partial cross-section through a form tool in various functional positions for blanking
  • FIG. 13 a partial top view of the form tool according to FIGS. 12 a - c;
  • FIGS. 14 a - d a partial cross-section through a form tool in various functional positions for hoop-steel cutting.
  • FIG. 1 shows a first shell in the form of a top shell 1 .
  • the top shell 1 has a convex pot-type central part 3 arced outward, with its circumferential wall 29 transferring into a holding edge 4 .
  • a step like reducing collar 5 is located between the pot-type central part 3 and the holding edge 4 .
  • the circumferential wall 29 is provided with a ruffled structure 30 also protruding on the interior 29 a (see FIG. 4 ).
  • the holding edge 4 is provided with mounting means 47 in the form of a total of four threads 7 a, 7 b, 7 c, 7 d, their contours being embodied both on the inside 6 a (see FIG. 3 ) as well as on the outside 6 b of the holding edge 4 .
  • a second shell (see FIG. 7 ) embodied as a bottom shell 2 , for example, can be fastened to the top shell 1 .
  • the holding edge 4 is also surrounded at the outside by an encircling punched edge 49 .
  • Said edge has a larger diameter than the top shell 1 , because it has been separated from a sheeting 23 during the production, for example using a holding and punching device 43 described in greater detail in FIG. 12 , with the holding and punching device 43 surrounding the top shell 1 in a sheath-like manner.
  • FIG. 2 In a side view of FIG. 2 , the progression of the threads 7 a, 7 b, 7 d is discernible in particular.
  • the thread 7 c is not visible in this view because it is located at the back of the top shell 1 .
  • the four threads 7 a, 7 b, 7 c, 7 d protrude towards the outside and are separated from each other by thread teeth 17 a, 17 b, 17 c, 17 d.
  • the thread teeth 17 a, 17 b, 17 c, 17 d protrude on the inside 6 a (see FIG. 3 ) of the holding edge 4 towards the inside and form a tread for complementarily embodied elements of the bottom shell 2 .
  • the elements can be embodied as holding wings 11 a, 11 b, 11 c, 11 d according to FIG. 5 , for example.
  • each thread 7 a, 7 b, 7 c, 7 d there is one thread inlet 48 each, which widens funnel-shaped in the direction of the inlet side 31 in order to allow an easier acceptance of a holding wing 11 a, 11 b, 11 c, 11 d, for example. Furthermore, thread teeth 17 a, 17 b, 17 c, 17 d located in the rotational direction are respectively rounded on the inlet side 31 .
  • All threads 7 a, 7 b, 7 c, 7 d feather out in reference to the reducing collar 5 at an acute angle of less than 45°.
  • This area represents a clamping area 32 , in which for example holding wings 11 a, 11 b, 11 c, 11 d are fixed with their front edge 12 (see FIGS. 7 through 10 ) in the mounted state of the top and the bottom shells 1 , 2 .
  • FIG. 3 shows a cross-section extending through the center of the round top shell 1 and the sizing of the threads 7 a, 7 b, 7 d as well as the arrangement of the seal 8 embodied as a sealing cone 8 a.
  • the interior diameter 18 of the holding edge 4 is defined by the clear distance between two opposite thread teeth 17 a, 17 b, 17 c, 17 d. In FIG. 3 , the interior diameter 18 is defined by the distance between the thread teeth 17 b, 17 d.
  • the clear diameter inside two opposite threads 7 a, 7 b, 7 c, 7 d is called the nominal diameter 15 of the holding edge 4 . In FIG. 3 , the nominal diameter 15 is discernible, for example, between the threads 7 b, 7 d. The nominal diameter 15 is always larger than the interior diameter 18 .
  • Sealing cones 8 a protruding in the direction of the bottom 9 are visible between the reducing collar 5 and the circumferential wall 29 of the pot-type central part 3 , extending closed around the pot-type central part 3 .
  • the sealing cone 8 a contacts an opening edge 10 ( FIGS. 7, 9 ) from the inside and/or the upper section 34 a ( FIG. 9 ) of the cup wall 33 of the bottom shell 2 and thus develops a seal.
  • FIG. 4 shows the area around the holding edge 4 according to the sectional level in FIG. 3 .
  • the thread 7 a shown in this illustration is provided with a largely rectangular profile, open towards the inside 6 a.
  • the reducing collar 5 extends horizontally and is thus essentially perpendicular to the upper section 34 a of the cup wall 33 (see FIG. 9 ). Between the reducing collar 5 and the circumferential wall 29 there is a sealing cone 8 a, in the shown embodiment protruding the clamping area 32 downwards.
  • top shell 1 is shown without any surrounding sealing cone 8 a.
  • This embodiment is used for bottom shells 2 , whose opening edge 10 shall be sealed with a sealing foil.
  • a sealing cone 8 a in the mounted state of top shell 1 and the bottom shell 2 engaging below the opening edge 10 of the bottom shell 2 would pierce a sealing foil stretched over the opening edge 10 and is therefore unsuitable for such an embodiment.
  • top shell 1 shown in FIG. 5 is provided with a total of six threads 7 a, 7 b, 7 c, 7 d, 7 e, 7 f, which are evenly distributed over the interior 6 a (see FIG. 3 ).
  • Such a top shell 1 can be screwed onto a bottom shell 2 (not shown) having six holding wings 11 a, 11 b, 11 c, 11 d.
  • FIG. 6 shows another embodiment of the top shell 1 with a cylindrical circumferential wall 29 vertically positioned on the reducing collar 5 .
  • the pot-type central part 3 is shown without a central cover.
  • the ruffled structure 30 does not extend through the circumferential wall 29 .
  • the exterior 29 b of the circumferential wall 29 is rather provided with a smooth surface. Due to the ruffled structure 30 aligned in the axial direction of the top shell 1 it is possible to compensate torque acting in the circumferential direction on the top shell 1 and a complementary embodied form tool 20 during the production process.
  • FIG. 7 shows a bottom shell 2 as the second shell, with a slightly conical opening but essentially a cylindrical cup wall 33 , transferring in its upper section 34 a into an opening edge 10 .
  • the lower section 34 b of the cup wall 33 transfers into an even more conically merging base section 35 .
  • the bottom shell 2 is unilaterally closed by a bottom plate 36 .
  • the opening edge 10 of the second shell has mounting means 47 in the form of a total of four holding wings 11 a, 11 b, 11 c, 11 d evenly protruding towards the outside.
  • These holding wings 11 a, 11 b, 11 c, 11 d can engage correspondingly embodied threads 7 a, 7 b, 7 c, 7 d, 7 e, 7 f, as shown in FIGS. 1 through 6 , and be fixed by a rotary motion of the top shell 1 in reference to the bottom shell 2 in the treads 7 a, 7 b, 7 c, 7 d, 7 e, 7 f.
  • the fastening occurs by the holding wings 11 a, 11 b, 11 c, 11 d, having commonly used clockwise threads at their frontal edge 12 .
  • the holding wings 11 a, 11 b, 11 c, 11 d are in a common level in reference to each other and end at the top plainly with the opening edge 10 .
  • the distance from the exterior edge 14 of a holding wing 11 b to the exterior edge 14 of the opposite holding edge 11 d is called full-circle diameter.
  • the full-circle diameter 16 is selected slightly smaller than the nominal diameter 15 of the top shell 1 .
  • the exterior diameter 19 of the opening edge 10 is measured at the exterior of the holding wings 11 a, 11 b, 11 c, 11 d. In order for the top shell 1 to engage around the bottom shell 2 the exterior diameter 19 is selected slightly smaller than the interior diameter 18 of the holder edge 4 (cf. FIG. 3 ).
  • the symmetrical distribution of the holding wings 11 a, 11 b, 11 c, 11 d is also discernible in the top view according to FIG. 8 .
  • the symmetrical embodiment of each holding wing 11 a, 11 b, 11 c, 11 d is discernible. Originating from a rounded exterior edge 14 , adjusted to the curve of the opening edge 10 , the front edge 12 and the rear edge 13 of each holding wing 11 a, 11 b, 11 c, 11 d extend at the same angle in the direction of the opening edge 10 .
  • FIG. 9 shows the bottom shell 2 in a side view.
  • a conically opening base area 35 engages the bottom plate 36 , transferring into an essentially cylindrical, only slightly conically opening cup wall 33 .
  • said wall transfers into a counter-conical wall, which in turn ends in the opening edge 10 and/or the holding wings 11 a, 11 b, 11 c, 11 d arranged thereto.
  • the holding wings 11 a, 11 b, 11 c, 11 d are provided with the same material thickness as the opening edge 10 .
  • the holding wings 11 a, 11 b, 11 c, 11 d are also located in a horizontal level with the opening edge 10 .
  • the holding wings 11 a, 11 b, 11 c, 11 d may then also be provided at their bottom with a ramp-like incline similar to the incline of the thread.
  • FIG. 10 shows a bottom shell 2 with four holding wings 11 a, 11 b, 11 c, 11 d radially extending from the opening edge 10 .
  • the holding wings 11 a, 11 b, 11 c, 11 d have an asymmetrical shape compared to the embodiment shown in FIGS. 8 and 9 .
  • the front edge 12 steeply inclines in the radial direction. The angle amounts to approx. 45 to 60 degrees.
  • An evenly convexly arced common exterior and rear edge 13 , 14 abuts to the front edge 12 , immediately transferring into the subsequently front edge 12 .
  • FIGS. 11 through 14 the production of a first shell using the deep-drawing method is described with a thread as well as different embodiments of the forming tool 20 according to the invention.
  • the shell is the top shell 1 .
  • FIGS. 11 a through 11 c show a form tool 20 in three different functional positions with a sheeting 23 already formed to a top shell 1 .
  • FIG. 11 a an interior die 39 , a holding sheath 21 , and a threaded sheath 22 are located in an original position in reference to each other.
  • the threaded sheath 22 surrounds the holding sheath 21 and the interior die at the outside, both of which being arranged torque-proof in the form tool 20 .
  • the threaded sheath 22 is supported pivotally around the holding sheath 21 .
  • a contour 25 is formed inside the threaded sheath 22 for creating a thread 7 a, 7 b, 7 c, 7 d, 7 e, 7 f, so that a heated sheeting 23 is adjusted according to the shape of the form tool 20 and, in particular, the contours 25 of the threaded sheath 22 .
  • a multi-part form tool 20 comprising a holding sheath 21 and a threaded sheath 22 , it is possible to first form in a first processing step according to FIG. 11 a at least two threads 7 a, 7 b, 7 c, 7 d, 7 e, 7 f and subsequently to release the top shell 1 from the form tool 20 .
  • the sheeting 23 is fixed over a holding device 40 concentrically arranged around the form tool 20 .
  • the holding device 40 comprises a locally fixed punching thrust counter bearing 41 and a holding plate 42 that can be lowered in the direction of the punching thrust bearing 41 .
  • the sheeting 23 it is clamped between the punching thrust bearing 41 and the holding plate 42 .
  • the holding sheath 21 is provided with holding ribs 26 at its wall section 28 , particularly well discernible in FIG. 13 .
  • the holding ribs 26 are formed in the circumferential wall 29 of the top shell 1 as a ruffled structure 30 and allow a form-fitting force transmission.
  • the holding sheath 21 is moved back in the axial direction together with the interior die 39 and the holding plate 42 that can be lowered is raised so that the sheeting 23 with the top shell 1 embodied there is released from the form tool 20 and can be removed.
  • the top shell 1 can be separated from the sheeting 23 .
  • FIG. 12 Different functional positions of a form tool 20 for blanking are also shown in FIG. 12 in a partial cross-section.
  • the construction comprises, to a large extent identical to the form tool 20 shown in FIG. 11 , the centrally arranged interior die 39 , the holding sheath 21 , and the threaded sheath pivotal around it.
  • the form tool 20 is concentrically surrounded by a holding and punching device 43 , by which the top shell 1 can be immediately minted from the sheeting on the form tool 20 .
  • the holding and minting device 43 comprises the knife sheath 24 , immediately adjacent to the threaded sheath 22 , the separating plate 44 arranged around the knife sheath 24 , and the knife plate 45 located above the separating plate 44 . Both the separating plate 44 as well as the knife plate 45 can be moved vertically.
  • the forming of the top shell 1 in the sheeting 23 occurs according to the position of the form tool 20 in FIG. 12 a.
  • the sheeting is fixed in a clamping fashion by the knife plate 45 lowered in the direction of the separating plate 44 .
  • the separating and knife plate 44 , 45 are lowered together so that a step forms in the sheeting 23 at the transfer from the separating plate 44 to the knife sheath 24 .
  • the threaded sheath is spindled off in the direction of motion 37 and a thread 7 a is discernible in the top shell 1 .
  • the knife sheath 24 Prior to the spindling the knife sheath 24 was moved upwards, causing the sheeting 23 to be cut off over its entire exterior circumference at the knife plate 45 .
  • the torque transferred to the sheeting loosely supported on the from tool 20 during the spindling process is compensated only by the ruffled structure 30 formed at the circumferential wall 21 and the holding ribs 26 complementary formed in the holding sheath 21 , and thus any complementary rotation of the top shell 1 already released from the sheeting 23 is avoided during spindling off.
  • the interior die 39 is axially pushed forward in reference to the fixed holding sheath 21 and the holding and punching device 43 is opened.
  • the top shell 1 can easily be removed from the form tool 20 by the interior die 39 being pushed forward.
  • the knife sheath 24 is returned to a lowered position.
  • FIG. 13 shows in a partial top view, the form tool 20 , holding ribs 26 arranged in the holding sheath 21 , which allow the fastening of the top shell 1 already separated completely from the sheeting 23 , or a fastening of the top shell 1 still connected to the sheeting 23 .
  • the holding ribs 26 are aligned in their axial direction perpendicular to the direction of motion 37 of the threaded sheath 22 .
  • the holding ribs 26 are located in an inclined wall section 28 of the holding sheath 21 . After the production process, the holding ribs 26 are again found as the ruffled structure 30 of the finished formed top shell 1 .
  • the holding sheath 21 is provided with several ventilation bores 27 , through which air located between the sheeting 23 and the form tool 20 can exit or be suctioned off.
  • FIG. 14 shows another alternative concerning the holding and support device 43 arranged around the form tool 20 in a partially cross-sectioned view for performing hoop-steel cutting.
  • the central component of the form tool 20 also comprises an interior die 39 , the holding sheath 21 , and the threaded sheath 22 .
  • the form tool 20 is surrounded by the holding and supporting device 43 comprising a fixed punching thrust bearing 41 , a holding plate 42 that can be lowered, and a hoop-steel knife 46 guided at the holding plate 42 .
  • the sheeting 23 is moved over the mold 20 and fixed circularly around the form tool 20 , in which the holding plate 24 is lowered and thus the sheeting 23 is clamped, supported on the minting counter bearing 41 .
  • the threaded sheath 22 is spindled off in the direction of motion 37 .
  • the sheeting 23 is held by both the holding sheath 21 and the sheeting compound.
  • FIG. 14 c Another processing step shown in FIG. 14 c comprises the lowering of the hoop-steel knife 46 to the sheeting 23 , thus separating the top shell 1 circumferentially from the sheeting 23 .
  • the hoop-steel knife 46 is embodied at its bottom with recesses at discrete distances, so that the top shell 1 remains connected to the sheeting 23 via residual bars 38 . These residual bars 38 are broken in a controlled manner in the subsequent stacking process.
  • the holding plate 42 is raised and the interior die 39 is moved together with the holding sheath 21 downwards to the same level as the punching thrust bearing 41 and the lowered threaded sheath 22 ( FIG. 14 d ). In this position the sheeting 23 can be removed in a simple manner horizontally out of the form tool 20 together with the top shell 1 and the holding and punching device 43 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Table Devices Or Equipment (AREA)
US11/660,120 2004-08-12 2005-08-12 Receptacle comprising a lid Abandoned US20070187408A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004039814A DE102004039814A1 (de) 2004-08-12 2004-08-12 Behälter mit Deckel
DE102004039814.3 2004-08-12
PCT/EP2005/008779 WO2006018239A1 (de) 2004-08-12 2005-08-12 Behälter mit deckel

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US20070187408A1 true US20070187408A1 (en) 2007-08-16

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US11/660,120 Abandoned US20070187408A1 (en) 2004-08-12 2005-08-12 Receptacle comprising a lid

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US (1) US20070187408A1 (de)
EP (1) EP1776286B1 (de)
CA (1) CA2576591A1 (de)
DE (1) DE102004039814A1 (de)
EA (1) EA010245B1 (de)
MX (1) MX2007001771A (de)
WO (1) WO2006018239A1 (de)

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US10011401B2 (en) 2011-06-28 2018-07-03 Rpc Bebo-Plastik Gmbh Method for producing a thermoformed item, and such an item

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DE102016119818B3 (de) * 2016-10-18 2017-09-14 Marbach Werkzeugbau Gmbh Mehrteilige Verpackung

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US3322262A (en) * 1965-06-01 1967-05-30 Leaming Plastics Inc Moisture-tight container
US3782574A (en) * 1970-08-20 1974-01-01 R Rumble Tamperproof closure for containers
US5542532A (en) * 1995-10-27 1996-08-06 Mitchell; David C. Compact disc holder
US5638976A (en) * 1995-11-15 1997-06-17 Arnold; Bruce Douglas Container with rotatable locking lid

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DE7037497U (de) * 1971-01-07 Illig A Maschinenbau Vorrichtung zur Herstellung von Gegen standen wie Deckeln und Boden aus thermo plastischer Kunststoff Folie
DE1704804B2 (de) * 1967-12-15 1975-05-22 Josef Krauss Und Rudolf Lensing Maschinenfabrik Gmbh, 5000 Koeln Verfahren und Vorrichtung zur Herstellung von Kunststoff-Gewindekappen für Flaschen und sonstige Behälter
JPS58220703A (ja) * 1982-06-18 1983-12-22 Toumei Kagaku Kogyo Kk 金型装置
JPH0948444A (ja) * 1995-08-09 1997-02-18 Chugoku Pearl Hanbai Kk 蓋嵌合容器
SE518637C2 (sv) * 1999-04-21 2002-11-05 Christer Ljungqvist Termoformad behållare och lock av tunnväggig plast samt metod för framställning av behållaren och lock
DE10230001A1 (de) * 2002-07-03 2004-01-22 Sig Technology Ltd. Deckel für Getränkekartonverbundpackungen sowie Werkzeuge und Verfahren zur Herstellung eines solchen Deckels sowie damit versehene Getränkekartonverbundpackungen

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US3322262A (en) * 1965-06-01 1967-05-30 Leaming Plastics Inc Moisture-tight container
US3782574A (en) * 1970-08-20 1974-01-01 R Rumble Tamperproof closure for containers
US5542532A (en) * 1995-10-27 1996-08-06 Mitchell; David C. Compact disc holder
US5638976A (en) * 1995-11-15 1997-06-17 Arnold; Bruce Douglas Container with rotatable locking lid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10011401B2 (en) 2011-06-28 2018-07-03 Rpc Bebo-Plastik Gmbh Method for producing a thermoformed item, and such an item

Also Published As

Publication number Publication date
EA010245B1 (ru) 2008-06-30
MX2007001771A (es) 2007-09-11
CA2576591A1 (en) 2006-02-23
DE102004039814A1 (de) 2006-02-23
WO2006018239A1 (de) 2006-02-23
EP1776286B1 (de) 2013-06-19
EA200700218A1 (ru) 2007-06-29
EP1776286A1 (de) 2007-04-25

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