Patent Number: 6,167,601

Title: Method for manufacturing ventilated sheet-metal floor members

Abstract: A method of manufacturing interlocking sheet metal floor members for use in a grain storage bin or like application requiring passage of fluid through the floor members without permitting passage of granular material therethrough. The method comprises the steps of forming a first interlocking section on a first side edge of a strip of sheet metal and a second interlocking section on a second side of the strip of sheet metal; shearing, opening and corrugating the strip of sheet metal in one roll forming stand which utilizes a pair of shearing and corrugation rollers, wherein the shearing step includes shearing rows of slits across a width of a central portion of the strip of sheet metal, wherein the opening step includes opening the slits to permit fluid flow therethrough, and wherein the corrugating step includes corrugating the strip of sheet metal along each of the series of the slits; and cutting the strip of sheet metal at selected transverse locations to form the sheet metal floor members. The first interlocking section of one sheet metal floor member is interlockable with the second interlocking section of another sheet metal floor member.

Inventors: Gollhofer; David (Mt. Pleasant, IA), Smithburg; Brad E. (Salem, IA)

Assignee: Conrad American

International Classification: B21D 31/00 (20060101); B21D 31/04 (20060101); B65D 88/74 (20060101); B65D 88/00 (20060101); B21D 031/04 ()

Expiration Date: 01/02/2018