Stock material or miscellaneous articles – Structurally defined web or sheet – Nonplanar uniform thickness material
Patent
1985-04-05
1987-08-25
Kittle, John E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Nonplanar uniform thickness material
428183, 72177, 72179, 72180, B32B 328, B32B 1500, B21D 514, B21D 516, B21B 1500
Patent
active
046892613
ABSTRACT:
The present invention relates to rounded corrugated sheeting (4) whose profile exhibits crest portions (5), flanks (6), and bottom portions (7). The crest portions (5) are located on the concave side of the rounded sheet and are provided with grooves formed by pressing during rounding of the sheeting. The grooves form ribs (10) on the convex side of the sheet. In the rounding of the sheet, the material present in the crest-portions (5) of the sheet (4) is distributed in a manner which facilitates rounding and counteracts the formation of folds or wrinkles in the crest portions (5), and prevents other forms of damage.
REFERENCES:
patent: 3009511 (1961-11-01), Bouef, Sr.
patent: 3690137 (1972-09-01), Cookson
patent: 3859832 (1975-01-01), Siegwart
patent: 4080815 (1978-03-01), Foster
patent: 4144369 (1979-03-01), Wass
patent: 4154077 (1979-05-01), Cotter
patent: 4215488 (1980-08-01), Donabedian
Kittle John E.
Ryan Patrick J.
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