US3911554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bending a laminated building panel and a corner produced thereby
Assignee: ROBERTSON-CECO Corp A DE CORP
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Filing: 1974-12-02
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Granted: 1975-10-14
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Expires: 1994-12-02
Abstract
Abstract A method of bending a building panel along a selected line extending transversely or longitudinally of the panel, to provide a corner having a smooth bending edge. In accordance with the present method, a backing is applied to the hidden face of a facing sheet. The backing is notched to provide a V-notch extending parallel with the selected line and having an apex proximate to the hidden face. The facing sheet is indented along the selected line to produce a groove in the exposed face and a complementing bead in the hidden face. The panel is then shaped into sections having a common bending edge coincident with the selected line and such that the inside of the bending edge is formed from the bead and the outside of the bending edge is formed from the groove. The groove which is visible prior to bending the panel is substantially imperceptible visually as a concavity after bending the panel.
Inventors
- 👤 Joseph E Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/06; B29C53/063; B23; B23C; B23C3/00; B23C3/28; B23C3/30; B23C3/305; B26; B26D; B26D3/00; B26D3/06; B26D3/065; B29C44/00; B29C44/34; B29C44/56; B31; B31F; B31F1/00; B31F1/08; B31F1/10; E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0875; E04F13/0878; B29C37/00; B29C37/0053; B29C37/0057; B29L; B29L2031/00; B29L2031/10; B29L2031/22; Y; Y10; Y10S; Y10S29/00; Y10S29/033; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
156 words
A method of bending a building panel along a selected line, comprising providing a metal facing sheet having an exposed face and a hidden face; applying a backing to substantially the entire area of said hidden face; notching said backing to provide a V-notch extending parallel with said selected line and having an apex proximate to said hidden face; and then indenting said facing sheet segment along said selected line to produce a groove in said exposed face and a complementing bead in said hidden face; and bending said building panel about said selected line to provide angularly presented panel segments having a common bending edge and such that the inside of said common bending edge is formed from said complementing bead and the outside of said common bending edge is formed from said groove, said groove which is visible prior to bending said panel being substantially imperceptible visually as a concavity after bending said panel.
Claim 2
Independent Claim
156 words
A method of bending a building panel along a selected line, comprising providing a metal facing sheet having an exposed face and a hidden face; applying a backing to substantially the entire area of said hidden face; notching said backing to provide a V-notch extending parallel with said selected line and having an apex proximate to said hidden face; and then indenting said facing sheet segment along said selected line to produce a groove in said exposed face and a complementing bead in said hidden face; and bending said building panel about said selected line to provide angularly presented panel segments having a common bending edge and such that the inside of said common bending edge is formed from said complementing bead and the outside of said common bending edge is formed from said groove, said groove which is visible prior to bending said panel being substantially imperceptible visually as a concavity after bending said panel.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said backing comprises a foamed plastics composition.
Claim 4
Dependent Claim
68 words
The method of claim 1 wherein said facing sheet is indented by: placing said panel between spaced-apart linear die members presenting a forming bead extending parallel with said selected line and confronting said exposed face, and a complementing forming groove parallel with and confronting said apex; and forcibly moving said die members toward one another, thereby to form said groove and said complementing bead in said facing sheet.
Claim 5
Dependent Claim
39 words
The method of claim 1 wherein said facing sheet is indented by: passing said panel between forming rolls presenting a peripheral forming bead engaging said exposed face and a peripheral complementing forming groove engaging said backing at said apex.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein said backing is notched by: cutting said backing along first and second cutting planes which intersect proximate to said hidden face.
Claim 7
Dependent Claim
48 words
The method of claim 1 wherein said backing comprises a core of foamed plastic composition having one face secured to said hidden face of said facing sheet and an opposite face; and a liner sheet substantially coextensive with said opposite face of said core of formed plastic composition.
Claim 8
Dependent Claim
54 words
The method of claim 6 wherein said panel is notched by: severing said liner sheet along spaced-apart cut lines parallel with said selected line; removing that segment of said linear sheet between said cut lines to expose said core; and removing a portion of said core between said cut lines to provide said V-notch.
Claim 9
Dependent Claim
15 words
The method of claim 7 wherein said portion of said core is removed by routing.
Claim 10
Independent Claim
206 words
A method of bending a building panel along a selected line which extends longitudinally of said panel, comprising providing a metal facing sheet having an exposed face and a hidden face; applying a backing to substantially the entire area of said hidden face, said backing comprising a liner sheet and a foam core disposed between said facing sheet and said liner sheet; notching said backing to provide a V-notch having an apex parallel with said selected line and proximate to said hidden face; passing said panel between forming rolls presenting a peripheral forming bead engaging said exposed face and a complementing peripheral forming groove engaging said core at said apex, to indent said facing sheet along said selected line and thereby to produce a groove in said exposed face and a complementing bead in said hidden face; and bending said building panel about said selected line to provide angularly presented panel segments having a common bending edge and such that the inside of said common bending edges formed from said complementing bead and the outside of said common bending edge is formed from said groove, said groove which is visible prior to bending said panel beng substantially imperceptible visually as a concavity after bending said panel.
Claim 11
Independent Claim
206 words
A method of bending a building panel along a selected line which extends longitudinally of said panel, comprising providing a metal facing sheet having an exposed face and a hidden face; applying a backing to substantially the entire area of said hidden face, said backing comprising a liner sheet and a foam core disposed between said facing sheet and said liner sheet; notching said backing to provide a V-notch having an apex parallel with said selected line and proximate to said hidden face; passing said panel between forming rolls presenting a peripheral forming bead engaging said exposed face and a complementing peripheral forming groove engaging said core at said apex, to indent said facing sheet along said selected line and thereby to produce a groove in said exposed face and a complementing bead in said hidden face; and bending said building panel about said selected line to provide angularly presented panel segments having a common bending edge and such that the inside of said common bending edges formed from said complementing bead and the outside of said common bending edge is formed from said groove, said groove which is visible prior to bending said panel beng substantially imperceptible visually as a concavity after bending said panel.
Claim 12
Dependent Claim
54 words
The method of claim 9 wherein said panel is notched by: severing said liner sheet along spaced-apart cut lines parallel with said selected line; removing that segment of said linear sheet between said cut lines to expose said core; and removing a portion of said core between said cut lines to provide said V-notch.
Claim 13
Dependent Claim
15 words
The method of claim 10 wherein said portion of said core is removed by routing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |