WO2007085298A2 - Procédé de fabrication d'un élément de verrouillage et élément de verrouillage - Google Patents

Procédé de fabrication d'un élément de verrouillage et élément de verrouillage Download PDF

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Publication number
WO2007085298A2
WO2007085298A2 PCT/EP2006/012633 EP2006012633W WO2007085298A2 WO 2007085298 A2 WO2007085298 A2 WO 2007085298A2 EP 2006012633 W EP2006012633 W EP 2006012633W WO 2007085298 A2 WO2007085298 A2 WO 2007085298A2
Authority
WO
WIPO (PCT)
Prior art keywords
shut
element according
color
bar
cross bar
Prior art date
Application number
PCT/EP2006/012633
Other languages
German (de)
English (en)
Other versions
WO2007085298A3 (fr
Inventor
Günter Richter
Original Assignee
Richter Guenter
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
Priority to EP06841232A priority Critical patent/EP1979146A2/fr
Application filed by Richter Guenter filed Critical Richter Guenter
Publication of WO2007085298A2 publication Critical patent/WO2007085298A2/fr
Publication of WO2007085298A3 publication Critical patent/WO2007085298A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
    • E01F13/02—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions free-standing; portable, e.g. for guarding open manholes ; Portable signs or signals specially adapted for fitting to portable barriers

Definitions

  • the invention relates to a method for producing a shut-off element. Furthermore, the invention relates to a shut-off.
  • shut-off elements which contain blow-molded plastic elements.
  • protruding formations for example for attaching warning lights, difficult to manufacture in the blow molding process, as a trimming of the circumferential Abquetschkante to projecting elements around difficult to perform and thus consuming.
  • protruding elements can be easily damaged during transport and in relatively rough construction site use, which then the entire shut-off is useless.
  • shut-off elements have vertical supports that are placed in openings of support elements to be fixed and stabilized by these support elements in a desired installation position.
  • blow-molded shut-off elements in the inserted state can bend off or break off at the point of exit from the support element even at low force.
  • blow-molded shut-off elements have a substantially uniform wall thickness.
  • a relatively small wall thickness offers the advantage that the entire shut-off then has a low weight, whereby its handling is facilitated.
  • the material consumption is lower at low wall thicknesses than thick wall thickness, whereby manufacturing costs are lower.
  • shut-off elements have a two-color surface coating which serves as a warning.
  • Such surface coatings are e.g. alternating red and white stripes or yellow and black stripes. This surface coating is subsequently applied to the shut-off elements by applying to them e.g. glued on colored foils.
  • the shut-off element is used in a coating process, e.g. Powder coating or painting, provided with the desired color.
  • the object of the invention is to provide stable shut-off that can be easily and inexpensively manufactured. Further, a method for To provide a shut-off indicate by the simple and inexpensive production of a shut-off is possible.
  • a non-foamed plastic layer and a foamed plastic layer of the same plastic material are connected to each other by extrusion and formed thermoplastic to the barrier.
  • shut-off element in which an adapter element can engage in a recess of the shut-off element, whereby elements connected to the shut-off element, such as e.g. Warning lights, can be easily attached to the shut-off.
  • Another aspect of the invention relates to a shut-off element with a blow-molded element made of plastic, which has at least two supports which are connected to each other by means of at least one connecting element.
  • the supports are at least partially enclosed in at least one area by a reinforcing element.
  • shut-off invention according to a reinforcement or stiffening of the supports in a simple manner possible, which in particular heavily stressed areas, such as the exit point of the support from a support element, are reinforced in a simple manner.
  • a shut-off element with improved quality properties of the supports can be produced relatively inexpensively. Due to the possibility of selectively reinforcing individual areas of the support, the total weight of the shut-off element can be kept relatively low. Furthermore, the supports be easily and inexpensively manufactured as a blow-molded element with a relatively low wall thicknesses with the connecting element inexpensively.
  • Another aspect of the invention relates to a method for producing a shut-off element in which an at least two-layer preform is produced.
  • the first layer of the preform contains a material of a first color and the second layer of the preform contains a material of a second color.
  • the preform is introduced into a mold and shaped by means of a thermoplastic molding process such that at least the outer layer of the shut-off element has the first color in a first region and the second color in a second region.
  • two-color shut-off elements can be produced in a simple manner.
  • Subsequent coloring for example by coating in a spraying or gluing process for coloring, is not required in the method according to the invention, as a result of which the overall production costs of the shut-off element can be considerably reduced.
  • Figure 1 is a side view of a shut-off element
  • Figure 2 is a sectional view of the shut-off of Figure 1 along the section line AA after removal from a blow mold.
  • Figure 3 shows the sectional view of the shut-off of Figure 2 with marked interfaces for post-processing;
  • Figure 4 shows the sectional view of the shut-off element according to Figures 2 and 3 after the completion of the shut-off element
  • Figure 5 is a sectional view of an alternative shut-off similar to the sectional view of Figure 2;
  • FIG. 6 is a sectional view of the shut-off element according to FIG. 5 with cut edges for post-processing
  • FIG. 7 is a sectional view of the shut-off according to the figures
  • FIG. 8 shows a detail of a joint of two adjacent ones
  • Figure 9 is a sectional view of a section of the shut-off of Figure 1 along the cutting plane B-B
  • Figure 10 is a plan view of a portion of the shut-off of Figure 1;
  • Figure 11 is a front view of an adapter element
  • Figure 12 is a side view of the adapter element of Figure 11;
  • Figure 13 shows a cross section through a shut-off element similar to Figure 1, but with a smooth convex cabinet bed.
  • Figure 14 is a two-layer structure of a wall for the molding with a foamed plastic layer
  • Figure 15 is a three-layer, sandwich-like wall structure; and FIG. 16 shows a longitudinal section through a shut-off element similar to that in FIG. 1, but with elliptical grating bars.
  • FIG. 1 shows a side view of a shut-off element 10 according to the invention, which is bounded laterally by vertical supports 12, 14.
  • the support 12 is inserted into a support element 16.
  • Such support elements may e.g. designed as cast from concrete cuboid support members 16, which have at least one hole for receiving the support 12.
  • Such support elements 16 preferably have at least two holes arranged next to one another transversely to the longitudinal axis in order to be able to simultaneously receive adjacent supports of two shut-off elements 10 arranged next to one another.
  • supporting elements are known which are made of plastic or have a steel frame for receiving the support 12, which may be weighted with other elements.
  • the shut-off element 10 comprises a blow molded part made of plastic and has an upper cross bar 18 and a lower cross bar 20. Below the upper cross bar 18 and above the lower cross bar 20, a full-area area 22, 24 is formed, respectively surface areas 26a to 26h or 28a to 28h, which are arranged alternately next to each other in a first color red and a second color white.
  • the area 22 is also referred to as a barrier leaf and the area 24 as a touch bar.
  • a warning mark is formed, which is clearly visible as a touch bar.
  • Touch strips are known for example from traffic signs, such as the traffic signs 600, 605, 610, 625 of the Highway Code.
  • the touch strips can also in the areas 26a to 26h or 28a to 28h arrow shapes include, so that thereby, for example, an evasion direction is indicated around the closed area around.
  • the basic color of the shut-off element can be, for example, white, whereby only the area areas 26a, 26c, 26e, 26g, 28a, 28c, 28e, 28g to be red-colored are subsequently coated with a material having a red surface color.
  • highly reflective red films can be glued to the basic body of the shut-off element 10 formed by the blow molding part in order to achieve the desired coloring.
  • a red-white colored foil in the areas 22 and 24 on the shut-off element 10 in order to produce the coloring of the touch bar.
  • This film then preferably contains highly reflective elements or pigments.
  • the front of the barrier 10 may be made of white plastic and its back made of red plastic.
  • bars 30a to 30h are formed bicoloured by means of the blow molding, as will be explained in more detail below in connection with Figures 2 to 7.
  • the potential wind load on the shut-off element 10 is reduced by the bars 30a to 30h and the openings therebetween.
  • the distances of the bars 30a to 30h are chosen so that the shut-off element 10 can not be passed through children in the areas between the bars 30a to 30h, whereby they are kept away from a locked area.
  • the supports 12, 14 continue to be connected in one piece directly to the barrier leaf formed by the transverse bars 18, 20 and the area lying between the transverse bars 18, 20 by a longitudinal slot in the sheet metal sleeve.
  • the sheet metal sleeve can thus easily be subsequently pushed over the support 12, 14 of the blow molding or already inserted into the blow mold.
  • the sheet metal sleeve in the region from the lower edge of the support 12 to the intersection point 34 have a fully closed, for example circular, cross-section, so that this area receives an even higher stability.
  • the sheet metal sleeve is preferably made of sheet steel, in particular of stainless steel.
  • FIG. 1 shows only the front side of the shut-off element 10, so that only the rectangular recesses 36a to 36h are visible.
  • adapter elements can be plugged in and secured if necessary, which can be connected to other elements, for example to warning lights. Accordingly, from the top edge of the crossbar 18, unlike the prior art, there are no longer any elements that are difficult to manufacture and hinder the handling of shut-off elements.
  • the cuboid recesses 36a to 36g have each been made as a groove in the crossbar 18 by using complementary shaped elements in the blow mold.
  • the recesses may also have other suitable shapes, in particular have a triangular or C-shaped cross-section and, for example, tapered down or be undercut.
  • securing means may be provided for siding the adapter elements in the recesses 36a-36h.
  • holes can be provided between opposing recesses through which fastening means, in particular screws or rivets, are introduced in order to secure the adapter element in the respective recess or in the respective recesses and to protect it against loss.
  • Such recesses 36a to 36h have the function of a holder for adapter elements and the function of a tapping of the plastic part, whereby the mechanical rigidity of this plastic part is increased.
  • FIG. 2 shows a sectional view of a section of the shut-off element 10 according to FIG. 1 along the section line AA.
  • the shut-off element 10 is made of a two-layer preform, whereby the front page 40 of the shut-off 10 in a first color and the back 42 of the shut-off 10 is shown in a second color.
  • the different colors are shown in FIGS. 2 to 7 by a different hatching of the layers of the shut-off element 10.
  • the front side 40 of the shut-off element 10 in the color white and the rear side 42 of the shut-off element 10 in the color red can be generated.
  • a two-layer preform is introduced into a mold and shaped by means of a thermoplastic molding process.
  • the first layer of the preform contains a material of a first color and the second layer a material of a second color.
  • a preform and a method and an apparatus for producing such a at least two-layer preform is known from the document DE 195 45 441 A1.
  • the embodiments of the preform and method and apparatus for making such a preform contained in this document are hereby incorporated by reference into the present specification.
  • the support 12 is connected via a web 44 with a hollow box profile 46. Between the box profile 46 and the grating bar 30a and between the other bars 30b to 30h open areas in the barrier sheet are present in the shut-off element 10 of Figure 1. After the blow molded part for the shut-off element 10 has been manufactured, a two-layer material layer is initially also present in these areas.
  • This material layer is cut out in sections after the blow molded part has been manufactured, so that openings are produced between the box profile 46 and the lattice bar 30a, between the lattice bars 30a to 30h and between the lattice 30h and the box profile connected to the support 14.
  • FIG. 3 shows a sectional view of the section of the shut-off element 10 according to FIG. 2, wherein the sectional positions of vertical sections for separating out specific areas from the blow-molded part are shown by means of vertical lines.
  • the already mentioned above sleeve is arranged as a part-circular reinforcing element 48, which serves to reinforce the support 12.
  • This reinforcing element 48 is made in the present embodiment of sheet steel, in particular stainless steel, wherein a tube with the length of the support 12 has been longitudinally separated and spread on the longitudinal slot, wherein the reinforcing member 48 elastically deformed. In this spread state, it has been pushed over the support 12.
  • the tubular reinforcing element 48 endeavors to return to its initial position so that it contracts again and establishes a frictional connection to the support 12.
  • the reinforcing element 48 has a smaller inner cross section than the outer cross section of the support 12.
  • the reinforcing element 48 can be connected to the support 12 with fastening means or connected to the support 12 by means of a positive connection.
  • the support 12 may also have other cross-sections, wherein the cross-sectional shape of the support 12 and the reinforcing member 48 need not match.
  • the reinforcing element 48 may be provided only in the region between the lower end of the support 12 and a point above the lower intersection point 34. This point above the point of intersection 34 is preferably in the range between 1 cm and 30 cm, in particular in the range between 7.5 cm and 15 cm above the point of intersection 34.
  • the reinforcing element may alternatively be made of plastic, for example by injection molding. Such a reinforcing element can also be welded to the support 12, 14.
  • the grating bars are preferably formed in such a bicolor that a color change is present in two juxtaposed bars 30a to 30h in a lateral plan view. As a result, an additional warning effect is achieved without the need for subsequent coloring.
  • FIG. 5 shows a sectional illustration of an alternative shut-off element 100 similar to the shut-off element 10 according to FIG.
  • the shut-off element 100 has a front side 140 and a rear side 142, which have different colors in the same way as the front side 40 and the rear side 42 of the shut-off element 10.
  • the grating bars 130a to 130h are designed as box profiles.
  • the box sections 130a to 130h are produced as an integral part of the blow molding of the shutoff element 100 by means of a blow molding process. The manufacture of the grating bars 130a to 130h thus takes place in the same way as the production of the solid material grid bars 30a to 30h of the shut-off element 10.
  • a reinforcing element 148 for reinforcing the support 112 is provided in the same way as described in connection with FIG. 4.
  • a further reinforcing element (not shown) can be introduced internally into the support 112.
  • FIG. 8 shows a detail of a connection point between the shut-off element 10 and an adjacent, similar shut-off element 90.
  • the reinforcing element 48 ends in the embodiment shown in Figure 8 about 10 cm below the upper edge 92 of the Absperrelements 10.
  • the reinforcing element 94 ends about 10 cm below the upper edge 96 of the Absperrides 90.
  • the web 44 is cut from above in such a way that between the remaining web rest and the support 12, a headband 98 can be firmly clamped.
  • the slot is tapered downwards.
  • the headband 98 may be secured by suitable means.
  • the web is cut between the support 99 and the barrier leaf of Absperrettis 90, whereby the headband 98 is clamped in this area.
  • the webs between the supports 12, 99 and the respective barrier leaf can be cut in different depths.
  • the webs have the same depth cuts, so that the headband 98 can also be aligned horizontally.
  • the front and rear sides of adjacent shut-off elements 10, 90 are arranged to each other such that the adjacent surfaces of the shut-off elements 10, 90 have different colors.
  • the front side of the shutoff element 10 has the base color white and the front side of the shutoff element 90 has the primary color red.
  • the warning effect of a chain consisting of several shutoff elements in the manner of the shutoff elements 10, 90 can be considerably increased.
  • FIG. 9 shows a sectional illustration of a section of the shut-off element 10 according to FIG. 1 along the section line B-B.
  • the recess 36b on the front side 40 of the shut-off element 10 opposite a recess 37b on the back 42 of the shut-off element 10 is provided.
  • the recesses 36b and 37b have a matching cuboidal basic shape, wherein the corners are provided with suitable radii.
  • the crossbar 18 is further formed as a box profile, wherein the region 22 is formed below the crossbar 18 as a relatively thin-walled plate. As already explained in connection with FIG. 1, suitable coatings are applied to the surface of this plate in order to produce a warning bar with alternating color areas 26a to 26h.
  • FIG. 10 shows a plan view of the blow-molded part for the shut-off element 10.
  • the recesses 36a to 36h are provided with identically shaped recesses 37a and 37b opposite one another.
  • FIG. 11 shows a side view of an adapter element 120 for mounting a warning light (not shown).
  • the adapter element 120 has a U-shaped connecting element 122, which is integrally connected to a cylindrical shaft 124.
  • the opening of the U-shaped element 122 is provided on the underside of the adapter element 120, so that the legs 126, 128 of the U-shaped connecting element 122 in two respective opposite recesses 36a, 37a; 36b, 37b can intervene.
  • the legs 126, 128 of the U-shaped connecting element 122 have one of the recesses 36a and 37a; 36b, 37b complementary shape and are inserted into this present in the latch 18 opposite recesses 36a, 37a and 36b and 37b.
  • the recesses 36a, 36b and the dimensions of the U-shaped connecting element 122 are dimensioned such that preferably the cross bar 18 in the region of the recesses 36a, 36b is elastically deformed and thereby a holding force is exerted on the U-shaped connecting element 122.
  • FIG. 12 shows a side view, rotated by 90 °, of the adapter element 120 according to FIG. 11.
  • FIG. 13 shows schematically a section approximately along the section line A'-A 'in the example of Figure 1.
  • the upper cross bar 18 is formed as in the example of Figure 9 as a box profile.
  • the barrier leaf 22 adjoining the transverse bar 18 is also designed as a hollow profile and has convex outer surfaces 50, 52. These surfaces 50, 52 are smooth on their surface and have no interruptions between the two-sided supports 12, 14. In particular, these surfaces 50, 52 have no taps or profilings which, as is known, would increase the rigidity of the region 22.
  • the smooth outer surfaces 50, 52 have the advantage that colored warning foils can be glued on them in a simple manner. If such surfaces 50, 52 would have a tapping structure, as is the case in the prior art, such films would easily form distortions at these nip sites or interruptions in the bonding process, which would result in increased handling expense. Also, the formation of the outer surfaces 50, 52 as a convex and possibly as a concave surfaces facilitates the application of adhesive films, since such an adhesive film comes into contact with the surface 50, 52 only with a relatively small area in adhesive contact, so that an alignment in this state still easily possible. If the surface 50, 52 were flat, the adhesive surface passing into contact with the impact would be very large and the risk of wrinkling would be increased.
  • a further cross bar 54 with a hollow box profile is provided.
  • the hollow profiles of the elements 18, 54 and the region 22 increase the mechanical stability of the Ab-locking member 10.
  • further cross bar 56 is formed as a box section.
  • the area 24 (touch bar) has in the same way as the area 22 (barrier sheet) smooth uninterrupted outer surfaces 58, 60 and carries no taps, so that in a simple way marking films can be adhered to the area 24.
  • reinforcing elements 48 and 148 are provided, preferably made of metal.
  • metallic reinforcing elements in tube form or in slotted tubular form increase the weight of the shut-off element and thus complicate its handling.
  • the subsequent arrangement of reinforcing elements is an additional step, which makes the entire manufacturing process more expensive.
  • damage to the reinforcing element such a shut-off can be addressed and repaired only at an increased cost.
  • the respective wall or the walls of the molding are constructed from two or three layers, which are extruded together, wherein between the walls of the molding at least in sections, a cavity is provided.
  • FIG. 14 shows a two-layer structure.
  • a layer 62 of the wall 64 has a foam structure, preferably foamed polyethylene or PE foam or foamed polypropylene or PP foam is used.
  • the second layer 66 is made of plastic, preferably polyethylene or PE or polypropylene.
  • the elements 18, 22, 54, 56, 24 and 20 as well as the grid bars are each formed from two walls in the manner of the wall 62 with a cavity between them, the foamed layer in each case being at the hollow profile of the elements 18, 22, 54, 56, 24, 20 is arranged inside.
  • the preform consists of two layers formed, wherein the layer 62 is added to the foam structure blowing agent which generates the closed foam pores.
  • FIG. 15 shows a three-layer structure of a wall 68, wherein the layer 70 with a foam structure is sandwiched centrally between two plastic walls 72, 74.
  • the outer plastic walls 72, 74 are preferably made of polyethylene or PE or polypropylene (PP).
  • the foam layer 70 is preferably made of polyethylene foam or PE foam or polypropylene foam.
  • the shaped body is shaped as a hollow profile using two walls 68 as in the example of FIG. Due to the
  • Foam structure of the walls 64, 68, the mechanical stiffness of the molded body and thus of the shutoff is increased, so that can be dispensed with additional stiffening elements, such as the described reinforcing elements and / or a tap.
  • FIG. 16 shows a section along the lines B'-B 'according to FIG. 1.
  • the bars 30a, 30b are not angular but have an elliptical shape. This elliptical shape reduces the wind resistance and thereby improves the stability of the shut-off.
  • the respective axis 78 of the bars 30a, 30b may be arranged parallel to the longitudinal axis 80 of the shut-off element; However, they can also be aligned at an angle up to 90 ° transverse to this longitudinal axis 80. In the present case, they have an angle of approximately 45 °.
  • the bars 30a to 30h can also have the layer structure of Figures 14 or 15, whereby their mechanical stiffness is increased, which is particularly advantageous for high wind loads.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Connection Of Plates (AREA)

Abstract

L'invention concerne un élément de verrouillage (10) comportant un élément moulé par soufflage réalisé en plastique au moyen d'un procédé de moulage par soufflage. L'élément moulé par soufflage comporte au moins deux montants (12, 14) et au moins un verrou transversal (18) essentiellement perpendiculaire aux montants (12, 14). Le verrou transversal (18) comporte au moins une cavité (36a à 36h) au travers de laquelle un élément adaptateur (120) conçu de façon complémentaire à la cavité (36a à 36h) dans au moins une zone peut être connecté à l'élément de verrouillage (10).
PCT/EP2006/012633 2006-01-25 2006-12-29 Procédé de fabrication d'un élément de verrouillage et élément de verrouillage WO2007085298A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06841232A EP1979146A2 (fr) 2006-01-25 2006-12-20 Procédé de fabrication d'un élément de verrouillage et élément de verrouillage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006003597A DE102006003597A1 (de) 2006-01-25 2006-01-25 Absperrelement und Verfahren zum Herstellen eines Absperrelementes
DE102006003597.6 2006-01-25

Publications (2)

Publication Number Publication Date
WO2007085298A2 true WO2007085298A2 (fr) 2007-08-02
WO2007085298A3 WO2007085298A3 (fr) 2007-09-27

Family

ID=37894427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/012633 WO2007085298A2 (fr) 2006-01-25 2006-12-29 Procédé de fabrication d'un élément de verrouillage et élément de verrouillage

Country Status (4)

Country Link
EP (1) EP1979146A2 (fr)
DE (1) DE102006003597A1 (fr)
RU (1) RU2008125562A (fr)
WO (1) WO2007085298A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1759160A1 (de) 1968-04-05 1971-01-14 Guenter Gubela Strassenleitpfosten
EP1403027A2 (fr) 2002-09-30 2004-03-31 JSP Corporation Article creux moulé en mousse de polypropylène et procédé pour le fabriquer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19600847A1 (de) * 1996-01-12 1997-07-17 Guenter Richter Verfahren und Vorrichtung zur Herstellung eines Formteiles aus thermoplastischem Kunststoff mit einer mehrschichtigen Wandung
GB9823528D0 (en) * 1996-05-01 1998-12-23 Colless Geoffrey M Crowd control barrier
US20030081998A1 (en) * 2001-10-18 2003-05-01 Yodock Leo J. Barrier device with foam interior
DE20311360U1 (de) * 2003-07-24 2004-12-02 Kwasny, Siegfried Absperrschranke

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1759160A1 (de) 1968-04-05 1971-01-14 Guenter Gubela Strassenleitpfosten
EP1403027A2 (fr) 2002-09-30 2004-03-31 JSP Corporation Article creux moulé en mousse de polypropylène et procédé pour le fabriquer

Also Published As

Publication number Publication date
WO2007085298A3 (fr) 2007-09-27
DE102006003597A1 (de) 2007-07-26
RU2008125562A (ru) 2010-02-27
EP1979146A2 (fr) 2008-10-15

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