Patents Assigned to Korstrask Mekaniska, G Naslund
  • Method and device for bending section-sheet, plate, strip and like material
    Patent number: 4380573
    Abstract: A corrugated sheet has a bend formed by one or more straight lines of impressions extending transversely across the corrugation valleys upwardly into the valleys and adjacent portions of the side walls between the valleys and the corrugation crests, and at the ends of the impressions the side walls have indents extending outwardly away from the impressions. The number of indents and impressions depends on the extent of the bend.
    Type: Grant
    Filed: January 30, 1980
    Date of Patent: April 19, 1983
    Assignee: Korstrask Mekaniska, G. Naslund
    Inventor: Gustav Naslund
  • Apparatus for bending section-sheet, plate strip and the like
    Patent number: 4195511
    Abstract: A corrugated metal sheet is incrementally bent perpendicularly with respect to its corrugations, by repeatedly transversely indenting upwardly the bottoms of the corrugation valleys so that the indentations extend in lines transversely across the sheet and extend into the corrugation sides which interconnect the valleys and ridges of the sheet. Each line of indentation causes the sheet to bend to some degree without detrimental stretching or drawing of the sheet.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: April 1, 1980
    Assignee: Korstrask Mekaniska, G. Naslund
    Inventor: Gustav Naslund
  • Roofing sheet
    Patent number: 4143499
    Abstract: A corrugated roofing sheet has special elevations formed in the wave crest of the sheet, the elevations being contoured to increase the sheet's rigidity while permitting the elevations to function as a ladder. The elevations provide effective rigidfying while leaving the valleys of the sheet corrugations free for drainage.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: March 13, 1979
    Assignee: Korstrask Mekaniska, G Naslund
    Inventor: Gustav Naslund