Patents by Inventor Kjell M. Jakobsen

Kjell M. Jakobsen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4991734
    Abstract: A container (30d) of polyethylene terephthalate or similar thermoplastic material has a container body (32d), a mouth portion (37d) and a central bottom part (34d). The central bottom part consists of chiefly amorphous and/or thermocrystallized material and forms a bulge directed towards the interior of the container. A ring-shaped or band-shaped standing surface (36d) is arranged adjacent the transition of the bottom part into the container wall (32d). Adjacent to the standing surface the container has a circumferential area of material (35d) which through stretching and/or reshaping has undergone flow and through heating has acquired built-in stresses which tend to contract it. The surrounding circumferential area of material prevents the inward bulge of the central bottom part from straightening out and/or turning inside out when the pressure in the container is increased and/or when the temperature of the container material is raised.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: February 12, 1991
    Assignee: PLM, AB
    Inventors: Torsten Nilsson, Kjell M. Jakobsen
  • Patent number: 4929168
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of the type polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one single or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner materials along the blank and elongates simultaneously the blank in the moving direction of the transitional zone. After the last re-shaping operation the thinner material has preferably an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: May 29, 1990
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4758452
    Abstract: An article of a thermoplastic of polyester or polyamide type, preferably of polyethylene terephthalate, manufactured from an element consisting of an edge part which surrounds a body in an arrangement in which the latter is sunk relative to the edge part. The element is formed from a blank of mainly amorphous material or from a material having a crystallinity of less than 10%. The blank consists, for example, of a flat plate, a blank shell or the like. The body or parts thereof are shaped by stretching the blank until that material flows which is located within the material sections of the blank, which form the edge part in the element, the material stretched up to flowing in the body assuming a crystallinity of between 10% and 25%, while the crystallinity in the material in the edge part and in the unstretched parts retains its original value of less than 10%. At least the body of the element is expanded against warm mould walls until the final shape of the particular article is obtained.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: July 19, 1988
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4725219
    Abstract: Apparatus for stretching a parison or a preform which is formed by a blank and where the preform is preferably intended to be reshaped into a container. In accordance with the invention the wall of the blank is provided with two laterally displaced material regions. A mechanical moulding device reduces the material thickness in the material of the wall with commencement in the region thereof where the two material regions are laterally displaced relative to one another.Lateral displacement of the material regions and reduction by the moulding device of the material thickness are selected in order to allow, respectively achieve a reduction in thickness equivalent to that the thermoplastic material obtains when it is stretched so that material flow occurs. In one embodiment the lateral displacement is achieved by the moulding device.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: February 16, 1988
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Torsten Nilsson
  • Patent number: 4721223
    Abstract: A container assembly comprising a container of plastic material adapted for receiving a liquid and including a bottom of convex shape in the central portion of which the material is thicker and less oriented than in the outer portion and the side wall. A stabilizing foot supports the container and for this purposes is welded to the container in the central portion of the bottom thereof whereat the material is less oriented. The foot includes an annular projection extending downwardly from the portion welded to the container. The projection is hollow and forms an annular support foot including a rim which extends upwardly from the projection into smooth peripheral sliding engagement with the bottom of the container. The support foot is welded to the container while the middle portion of the projection is held against the middle portion of the bottom of the container.
    Type: Grant
    Filed: February 18, 1987
    Date of Patent: January 26, 1988
    Assignee: Aktiebolaget Platmanufaktur AB
    Inventor: Kjell M. Jakobsen
  • Patent number: 4704243
    Abstract: A container (30d) of polyethylene terephthalate or similar thermoplastic material has a container body (32d), a mouth portion (37d) and a central bottom part (34d). The central bottom part consists of chiefly amorphous and/or thermocrystallized material and forms a bulge directed towards the interior of the container. A ring-shaped or band-shaped standing surface (36d) is arranged adjacent the transition of the bottom part into the container wall (32d). Adjacent to the standing surface the container has a circumferential area of material (35d) which by stretching and/or reshaping has undergone flow and by heating has acquired built-in stresses which tend to contract it. The surrounding circumferential area of material prevents the inward bulge of the central bottom part from straightening out and/or turning inside out when the pressure in the container is increased and/or when the temperature of the container material is raised.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: November 3, 1987
    Assignee: PLM AB
    Inventors: Torsten Nilsson, Kjell M. Jakobsen
  • Patent number: 4701121
    Abstract: Apparatus for producing a container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least approximately 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mold (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mold (11) is moved towards the orifice (22) of the final container.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: October 20, 1987
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4631163
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of the type polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one single or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and elongates simultaneously the blank in the moving direction of the transitional zone. After the last re-shaping operation the thinner material has preferably an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: December 23, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4595550
    Abstract: A method of forming a preform having crystallized thermoplastic material from a blank of orientable thermoplastic material, such as polyethylene terephthalate, which comprises laterally displacing first and second regions of a blank, preferably tubular, of orientable thermoplastic material to form an intermediate region between the displaced regions having outer surfaces facing in opposite directions. Pressure is applied to the outer surfaces of the intermediate region to relatively displace these outer surfaces longitudinally of the blank while concurrently reducing the thickness of one of the first and second regions to the value of the thickness that the material would obtain if freely stretched to flow to achieve crystallization of the material in the aforesaid one region. The material in the one region, during the reduction of thickness thereof flowing from the orientable material thereof to a transition zone to form the one region which is reduced in thickness and is elongated in length.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: June 17, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Torsten Nilsson
  • Patent number: 4587073
    Abstract: A method of producing a container of plastic material from a blank comprising a plurality of layers in tubular form in which the inner layer consists of new material and the adjacent layer consists of previously used plastic material which has been recycled for re-use. One end of the blank is created and closed on a bowl-shaped support and thereat the inner layer penetrates to the outer surface of the blank to form a region which consists completely of new and not previously used material. The blank is then blow-molded to form the container.
    Type: Grant
    Filed: May 2, 1984
    Date of Patent: May 6, 1986
    Assignee: Platmanufaktur AB
    Inventor: Kjell M. Jakobsen
  • Patent number: 4584158
    Abstract: A method and a device for production of a temperature-stable, biaxially oriented container of thermoplastic material. In a first moulding stage a blank (40) is placed in a blow mould (12) after which a mandrel (15) extends the blank in its axial direction to a length exceeding the axial length of the future container. The length of the stretched material, in an axial section through the stretched blank, is then reduced at a predetermined temperature, and the reduction being made to a profile length substantially agreeing with the profile length for corresponding material portions in an axial section through the future container. In a second moulding stage the stretched blank is expanded to abut against the walls of the mould. The expansion takes place at a point in time for and/or at a speed allowing the reduction of the length of the stretched material, due to shrinkage to have time to be concluded before the material comes into contact with the walls of the mould.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: April 22, 1986
    Assignee: Petainer S.A.
    Inventors: Claes T. Nilsson, Kjell M. Jakobsen
  • Patent number: 4580968
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and simultaneously elongates the blank in the moving direction of the transitional zone while reducing the thickness. After the last re-shaping operation the thinner material preferably has an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: April 8, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4569866
    Abstract: An object is produced from a tubular blank (10,15,17) of thermoplastic material of polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker and thinner material along the blank and simultaneously elongates the blank in the moving direction of the transitional zone while reducing the thickness. After the last re-shaping operation the thinner material preferably has an oriented state. During the re-shaping operation the temperature of the material in the transitional zone (13,14,113) is controlled at a level which, immediately before the re-shaping operation, is within or close to the range of the glass transition temperature (TG).
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: February 11, 1986
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4564495
    Abstract: A method of producing a container of polyethylene terephthalate or similar thermoplastic material from a tubular blank of amorphous material. A mechanical forming element moves a transitional zone between amorphous (thicker) material and thinner oriented material stretched to flow during simultaneous elongation of the blank in the direction of movement of the transitional zone. The stretched and oriented material is heated to a temperature higher than the temperature of the material immediately before stretching. As a result, the internal stresses produced in the material during earlier stretching are relieved. Heating causes the length of the material in the direction of stretching also to be reduced. Each subsequent forming stage for shaping the container takes place at a temperature lower than the temperature at the immediately preceding forming stage.
    Type: Grant
    Filed: November 23, 1982
    Date of Patent: January 14, 1986
    Assignee: PLM AB
    Inventors: Torsten Nilsson, Kjell M. Jakobsen
  • Patent number: 4540544
    Abstract: A method for producing a container from a tubular blank of polyethylene terephthalate or similar material, according to which a polyethylene terephthalate blank is stretched at least approximately 3-fold to produce a preform (20). In an axial section through the preform, the contour length substantially corresponds to the contour length in an axial section through the final container. The preform (20) is heated to a temperature above the glass transition temperature (TG) and is converted to the container (21) in a blow mold (12). In doing so, the contour length of the material is maintained through successive reduction of the axial length of the body (23) which the preform constitutes during the conversion to the container. In order to achieve this, the base portion of the blow mold (11) is moved towards the orifice (22) of the final container.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: September 10, 1985
    Assignee: PLM AB
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4530811
    Abstract: A process of producing a tubular pre-moulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: July 23, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4518340
    Abstract: Apparatus for producing a tubular premoulding of a thermoplastic material, suitable for subsequent shaping to form containers by a rolling process. The material in a part of a tube is axially oriented as a result of reducing the wall thickness by applying an external pressure which causes the material to flow. The oriented material is moulded by a blow-moulding process into future mouth parts and parts of adjacent neck sections, preferably from two blank parts, joined to one another, of pre-mouldings, the blank parts in the transition between the two mouth parts being severed in order to form two separate blank parts, so that, after closing one end and, if necessary, reworking in order to obtain the requisite closing faces at the other end, the two blank parts each form a tubular pre-moulding.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: May 21, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson
  • Patent number: 4512735
    Abstract: A mold, for forming a container by fluid pressure, having two mold halves and two axially movable plungers, the plungers forming the bottom of the container therebetween, an inner plunger or mandrel having a concave end and a second plunger, hereafter called "the bottom part", having a convex end.
    Type: Grant
    Filed: November 23, 1982
    Date of Patent: April 23, 1985
    Assignee: PLM AB
    Inventors: Torsten Nilsson, Kjell M. Jakobsen
  • Patent number: 4511322
    Abstract: Apparatus for the manufacture of articles from a thermoplastic of polyester or polyamide type, preferably of polyethylene terephthalate, the element consisting of an edge part which surrounds a body in an arrangement in which the latter is sunk relative to the edge part. The element is formed from a blank of mainly amorphous material or from a material having a crystallinity of less than 10%. The blank consists, for example, of a flat plate, a blank shell or the like. The body or parts thereof are shaped by stretching the blank until that material flows which is located within the material sections of the blank, which form the edge part in the element, the material stretched up to flowing in the body assuming a crystallinity of between 10% and 25%, while the crystallinity in the material in the edge part and in the unstretched parts retains its original value of less than 10%. At least the body of the element is expanded against warm mould walls until the final shape of the particular article is obtained.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: April 16, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Clees T. Nilsson
  • Patent number: 4493633
    Abstract: Apparatus for moulding an article (11) of thermoplastic material from a parison (10) in which certain parts (17,16) of the parison are re-formed while other parts (13,12,20) retain their shape. A difference in pressure is applied to the wall of the parison during the re-forming process. Material in the parison is also moved in the direction of those parts of the parison which are to be re-formed, whereby attenuation of the material may be avoided entirely, if so desired, also in those parts which are to be re-formed. The invention enables the parison for a bottle to be re-formed to an extent which is small by comparison with the thickness of the material, for example the so-called "neck support" ring and the so-called "pilfer proof" ring, starting with a tube of oriented material. In a device for the application of the invention the elements (22,21,25) are in contact with the parts (13,12,20) of the parison.
    Type: Grant
    Filed: January 14, 1983
    Date of Patent: January 15, 1985
    Assignee: PLM Aktiebolag
    Inventors: Kjell M. Jakobsen, Claes T. Nilsson, Lars G. Larsson