Patents Assigned to Metalgrafica Rojek LTDA.
  • Patent number: 6442991
    Abstract: “CAN BODY STRETCHING AND MOLDING DEVICE” comprised by a hard and solid forming block (1) in steel or any other harder material, generally cylindrical which presents the biggest part of its height with a larger diameter corresponding to the inner diameter of the can already stretched having on its upper part a conic section (3) topped by a short cylindrical section with smaller diameter corresponding to the inner diameter of the can body to be stretched; said forming block (1) receives from below, where it seats, a flange forming tool at the lower part of the can body, said tool formed by a steel disk (5) having a circular groove (6) in fluting section, susceptible to be reached and taken by the lower end of the can body on its stretching and molding process; it is further provided a flange forming tool on the upper part of the can formed by a steel disk (10) provided on its lower face with a circular groove (11) of fluting section and having a small circular and salient section (12) which surround
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: September 3, 2002
    Assignee: Metalgrafica Rojek LTDA.
    Inventor: Arnaldo Rojek
  • Patent number: 5881897
    Abstract: A can is formed by an overall cylindrical body with a nailed bottom wall and presenting on its superior part and close to an aperture thereof a round fillet which is outwardly turned. The closure of the can is by a metallic, easy-opening lid, formed essentially by a circular panel with a short descending skirt which is provided with a narrow peripheral fillet. The lid includes a sealing gasket on its internal surface and presenting, in the middle of its panel, a circular basin-shaped depression with a central hollow which is closed by a resinous, thermoplastic, detachable seal. The present improvements provide a new configuration for the superior part of the can body, by which the referred skirt of the lid and its respective fillet are inwardly spaced in relation to the side wall of the cylindrical body of the can, in such a way to eliminate any possibility of mounting or overlapping of the peripheral fillets of adjacent cans, whenever the cans are grouped or placed side by side.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: March 16, 1999
    Assignee: Metalgrafica Rojek Ltda
    Inventor: Arnaldo Rojek
  • Patent number: 5833090
    Abstract: The present invention comprises a metal lid constituted by a circular panel, endowed with downward short turned rim or skirt and provided in its inner peripheral circumference a circular groove containing a sealing gasket and having a circular concave depression disposed preferably in a central portion of the panel, wherein there is formed a central hole and wherein in a lateral portion or sector of this circular depressed area is applied a film of high-adherence varnish, being furthermore filled up with an adherent thermoplastic and melting material-former of the seal that penetrates in the hole, forming a short vertical rod, which does not extravasate the hole and remains with its end close and at the same plane of the internal and inferior surface of the panel of the lid without forcing any portion or residue of the material in the inferior part of the hole and further wherein, the film of high-adherence varnish, applied in a lateral part or sector of the circular depression, allows the partial retention o
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: November 10, 1998
    Assignee: Metalgrafica Rojek Ltda.
    Inventor: Arnaldo Rojek
  • Patent number: 5566568
    Abstract: The present invention relates to a method of manufacturing a can to receive and to be closed by an easily removable cover merely by the action of vacuum and without the help of any mechanical means. The cover is provided with a sealing gasket, a relief hole and a detachable seal. The upper end of the can is provided with an outwardly wound cord. The upper part of the can is retracted with a marked reduction in diameter as compared to the remaining portion of the can. The upper part of the can is retracted such that an external border of the cord is kept in the same vertical alignment with the remaining portion of the can. This upper part is retracted in this manner so that when the cover is placed on the can, the internal face of its flange is in touch with the external face of the remaining portion of the can. This produces a can which can be closed by an easily removable cover having an unclinched sealing gasket.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: October 22, 1996
    Assignee: Metalgrafica Rojek Ltda.
    Inventor: Arnaldo Rojek
  • Patent number: 5566854
    Abstract: The present invention provides a can for foodstuff packing having a bottom, a cylindrical body and a cover. The cylindrical body includes an upper part, a lower part and a lateral external wall therebetween and the lower part is attached to the bottom. The upper part includes an end extending beyond the lateral external wall. The upper part reduces in diameter from the diameter of the lateral external wall to the end of the upper part. An outwardly wound cord having a lateral external border is disposed on the end of the upper part. The lateral external border of the cord is in vertical alignment with the lateral external wall of the cylindrical body. The cover includes a circular panel, a sealing gasket and a lower flange. The sealing gasket is disposed on an interior surface of the circular panel. The lowering flange includes an outwardly wound cord at its lower end and an internal surface, which abuts a portion of the lateral external wall beyond the upper part of the can.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 22, 1996
    Assignee: Metalgrafica Rojek Ltda.
    Inventor: Arnaldo Rojek
  • Patent number: 5439724
    Abstract: A lid for sealing a container. The lid adheres to the container by a vacuum formed within the container. The lid is formed of a substantially circular panel having a flanged perimeter and a concave depression on an upper side of the circular panel. A pressure release hole extends through the concave depression of the circular panel and sanitary coating is disposed on a lower side of the circular panel. A first adhesive material is applied to the lower side of the lid by fusion to the sanitary coating to form a thin film over the release hole, and a second adhesive material is disposed in the concave depression on the upper side of the lid to form a removable seal. The second adhesive material has the same properties as the first adhesive material.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: August 8, 1995
    Assignee: Metalgrafica Rojek Ltda.
    Inventor: Arnaldo Rojek
  • Patent number: 5275679
    Abstract: A a lid for sealing a container. The lid adheres to the container by no more than a vacuum formed within the container. The lid is formed of a substantially circular panel having a flanged perimeter and a concave depression on an upper side of the circular panel. A pressure release hole extends through the concave depression of the circular panel and sanitary varnish is disposed on a lower side of the circular panel. A first adhesive material is applied to the lower side of the lid by fusion to the sanitary varnish to form a thin film over the release hole, and a second adhesive material is disposed in the concave depression on the upper side of the lid to form a removable seal. The second adhesive material has the same properties as the first adhesive material.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: January 4, 1994
    Assignee: Metalgrafica Rojek Ltda.
    Inventor: Arnaldo Rojek