CLADDING SHEETS

• US 3,824,664 A
• Filed: 12/11/1973
• Issued: 07/23/1974
• Est. Priority Date: 03/29/1972
• Status: Expired due to Term

• Current Assignee: Conder Group Plc
• Original Assignee: Morris Seeff
• Inventors: Seeff, Morris
• Primary Examiner(s): Larson, Lowell A.
• Application Number:
  US05/423,764
• Time in Patent Office: 224 Days
• Field of Search: 29/155,183,18SS 52/630 72/177,196,379,385
• US Class Current: 428/604
• CPC Class Codes: B21D 11/08 Bending by altering the thickness of part of the cross-section of the work B21D11/06 takes precedence
• CPC Class Codes: B21D 11/20 Bending sheet metal, not otherwise provided for
• CPC Class Codes: B21D 11/206 Curving corrugated sheets
• CPC Class Codes: B21D 13/10 into a peculiar profiling shape
• CPC Class Codes: Y10T 428/12417 Intersecting corrugating or dimples not in a single line [e.g., waffle form, etc.]
• CPC Class Codes: Y10T 428/12799 Next to Fe-base component [e.g., galvanized]

Abstract

A method of bending a corrugated sheet about an axis extending at right angles to the corrugations is disclosed wherein a plurality of rib formations are pressed in those corrugations having their apices nearest the axis, the rib formations all projecting from the same surface of the sheet relative to the axis and extending at an angle to the corrugations over at least part of the side portions and at least part of the intermediate portions of the corrugations. In one form of the invention the corrugated sheet comprises a metal cladding sheet. Also disclosed is a corrugated sheet bent about an axis extending at right angles to the corrugations including a plurality of rib formations projecting from the same surface of the sheet when viewed from the axis, the rib formations being at an angle to the corrugations and extending over at least part of the side portions and at least part of the intermediate portions of the corrugations.

Claims

2. A method of bending a corrugated sheet according to claim 1, wherein the pressing of rib formations into the sheet comprises the steps of:

a. providing a first die member having a generally planar base, raised formations projecting from said base and spaced and contoured for general mating engagement with the wall surfaces within said cavities, and upstanding formations projecting from said base and extending between adjacent ones of said raised formations;

b. causing said first die member to operatively engage said corrugated sheet on one side thereof such that spaced raised formations are inserted within said plurality of cavities and engage the inside walls thereof and such that said upstanding formations are in engagement with those corrugations having their apices nearest said axis;

c. causing a second die member of geometric configuration complimentary to said first die member to operatively engage said corrugated sheet in exact opposing relationship to said first die member such that said sheet is sandwiched therebetween; and

d. forcing said first and second die members toward mating engagement with one another with said corrugated sheet sandwiched therebetween such that said raised spaced formations and said upstanding formations impress said plurality of rib formation into said sheet.

3. A method of bending a corrugated sheet according to claim 1, comprising forming the rib formations in rows, each row being formed in one operation and extending across the entire sheet, and repeatedly forming said rows at spaced intervals along the sheet in a direction parallel to the corrugations to give the desired degree of bending.

4. A method of bending a corrugated sheet according to claim 1, comprising forming the rib formations in rows extending across the entire sheet, with a plurality of said rows being formed in one operation, and repeatedly forming said plurality of rows at spaced intervals along the sheet in a direction parallel to the corrugations to give the desired degree of bending.

5. A method of bending a corrugated sheet according to claim 1, comprising pressing into the side portions said rib formations which decrease in width and in height relative to the surface from which they project and in the direction away from the intermediate portions.

6. A method of bending a corrugated sheet according to claim 1, comprising pressing the rib formations so as to project from the sheet surface on that side of the sheet opposite the axis.

7. A method of bending a corrugated sheet according to claim 1, comprising discontinuing formation of the rib formations over at least part of the intermediate portions of the sheet, to define a drainage channel.

8. A method of bending a corrugated sheet according to claim 1, comprising forming the rib formations so as to extend at right angles to the corrugations.

9. A method of bending a corrugated sheet according to claim 1, including the step of feeding the sheet in a direction parallel to its corrugations between a pair of mating die members adapted to press the rib formations in the corrugations.

10. A method of bending a corrugated sheet according to claim 1, comprising forming the rib formation in the side portion of each corrugation and in each intermediate portion, so as to be continuous at least over that area where two adjacent side and intermediate portions meet.

11. A method of bending a narrOw ribbed sheet having a plurality of narrow rib corrugations longitudinally extending at least over that area of the sheet to be bent, each narrow rib corrugation having a pair of side portions joining at an apex and said sheet having intermediate portions continuously connecting adjacent side portions of different ones of said corrugations, said method being operable to bend the corrugated narrow ribbed sheet about an axis extending at right angles to the corrugations and positioned opposite that side of said sheet from which said narrow rib corrugation apices project, comprising:

pressing, by means of a tool operating within the cavities defined by said joined side portions of those narrow ribbed corrugations having their apices furthest away from the axis, a plurality of rib formations into said side portions of the narrow rib corrugations and into said intermediate portions of the narrow rib corrugations so as to project the pressed rib formations from the same surface of the sheet relative to the axis, and at an angle to the corrugations and continuously extending over at least part of each side portion and over at least part of each intermediate portion.

12. A continuous corrugated sheet having a plurality of corrugations each having a pair of side portions joining at an apex running longitudinally with the corrugation and having intermediate portions connecting the side portions of adjacent corrugations, said sheet being curved about an axis extending at right angles to the corrugations, and including a plurality of rib formations formed therein and projecting from the same surface of the sheet when viewed from the axis, each rib formation being at an angle to the corrugations and continuously extending over at least part of each side portion and at least part of each intermediate portion.

13. A continuous corrugated sheet according to claim 9, wherein the rib formations in the side portions of the corrugations, and in the direction away from the intermediate portions of the sheet, decrease in width and in height relative to the surfaces from which they project.

14. A continuous corrugated sheet according to claim 9, wherein the rib formations are discontinuous over at least part of the intermediate portions to define a drainage channel.

15. A continuous corrugated sheet according to claim 9, wherein the rib formations extend at right angles to the corrugations.

16. A method of bending a metal cladding sheet about an axis comprising:

a. providing the sheet with a plurality of corrugations longitudinally extending at right angles to a bending axis, each corrugation having a pair of side portions joining at an apex, with intermediate portions of the sheet connecting adjacent side portions of different ones of said corrugations; and

b. pressing into those corrugations having their apices nearest the axis, a plurality of rib formations so as to project the rib formations from the same surface of the sheet relative to the axis, and at an angle to the corrugations and continuously extending over at least part of each side portion and at least part of each intermediate portion.