US5237734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of interlocking hemmed together panels
Assignee: Motors Liquidation Co
•
Filing: 1992-05-15
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Granted: 1993-08-24
•
Expires: 2012-05-15
Abstract
Abstract A method for interlocking the hemmed together flanges of the inner and outer panels comprises the steps of forming a plurality of raised beads at spaced intervals along the length of the edge of the inner panel; placing the inner panel inside the outer panel with the raised beads facing away from the outer panel; and hemming the edge of the outer panel over the edge of the inner panel by a hemming punch having a plurality of slots therein located to register with the raised beads of the inner panel so that the outer panel is coined into interlocking engagement with the raised beads to thereby interlock the inner and outer panels together against relative movement. The raised beads preferably have a height generally equal to the thickness of the inner panel, and are preferably elongated in shape with the elongation extending in the direction either parallel or perpendicular to the edge of the panel. The slots in the hemming die preferably have a length longer than the mating raised bead of the inner panel to allow at least one millimeter of clearance between the panels at each end of the beads.
Inventors
- 👤 Mario A. Polon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:07
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/02; B21D39/021; B21D39/026; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49922; Y10T29/49936; Y10T29/53; Y10T29/53709; Y10T29/53787; Y10T29/53791
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A method of interlocking hemmed together edges of inner and outer panels and preventing disortion of the outer panel, comprising the steps of: forming a plurality of raised beads at spaced intervals along the edge of only the inner panel; placing the outer panel on a flat platen; placing the inner panel inside the outer panel with the raised beads facing away from the outer panel; and hemming the edge of the outer panel over the edge of the inner panel by hemming punch means having a plurality of slots therein located to register with the raised beads of the inner panel so that the edge of the outer panel is coined into interlocking engagement with the raised beads of the inner panel and forms a raised bead on the outer panel which overlies and closely fits around the raised bead of the inner panel to thereby interlock the inner and outer panels together against relative movement.
Claim 2
Independent Claim
157 words
A method of interlocking hemmed together edges of inner and outer panels and preventing disortion of the outer panel, comprising the steps of: forming a plurality of raised beads at spaced intervals along the edge of only the inner panel; placing the outer panel on a flat platen; placing the inner panel inside the outer panel with the raised beads facing away from the outer panel; and hemming the edge of the outer panel over the edge of the inner panel by hemming punch means having a plurality of slots therein located to register with the raised beads of the inner panel so that the edge of the outer panel is coined into interlocking engagement with the raised beads of the inner panel and forms a raised bead on the outer panel which overlies and closely fits around the raised bead of the inner panel to thereby interlock the inner and outer panels together against relative movement.
Claim 3
Dependent Claim
38 words
The method of claim 1 further characterized by the raised bead having a height, and the inner panel having a thickness, and the height of the raised bead being generally equal to the thickness of the inner panel.
Claim 4
Dependent Claim
28 words
The method of claim 1 further characterized by the raised bead being elongated to provide an elongated shape extending in a direction parallel with edge of the panel.
Claim 5
Dependent Claim
29 words
The method of claim 1 further characterized by the raised bead being elongated in shape with the elongation extending in a direction perpendicular to the edge of the panel.
Claim 6
Dependent Claim
28 words
The method of claim 1 further characterized by only a portion of the edge of the outer panel being hemmed over the raised bead of the inner panel.
Claim 7
Dependent Claim
54 words
The method of claim 3 further characterized by the hemming being performed by a hemming die having slots and the slots in the hemming die having a length longer than the raised bead of the inner panel to allow about 1 millimeter of clearance between the panels at each end of the raised beads.
Claim 8
Independent Claim
227 words
A method of interlocking hemmed together edges of inner and outer panels and preventing distortion of the outer panel, comprising the steps of: stamping the inner panel to a desired size and shape including forming a plurality of raised beads at spaced intervals along the edge of the inner panel; stamping the outer panel to a desired size and shape with the outer panel having a flange forming edge portion adapted to be hemmed over the edge of the inner panel to hem flange the panels together; placing the outer panel on a flat platen; marrying the inner and outer panel by placing the inner panel inside the outer panel with the raised beads facing away from the outer panel and with fixtures which hold the panels against movement relative one another; and hemming the edge of the outer panel over the edge of the inner panel by hemming punch means having a plurality of slots therein located to register with the raised beads of the inner panel so that the edge of the outer panel is coined into interlocking engagement with the raised beads of the inner panel and forms a raised bead on the outer panel which overlies and closely fits around the raised bead of the inner panel of the inner panel to thereby interlock the inner and outer panels together against relative movement.
Claim 9
Independent Claim
227 words
A method of interlocking hemmed together edges of inner and outer panels and preventing distortion of the outer panel, comprising the steps of: stamping the inner panel to a desired size and shape including forming a plurality of raised beads at spaced intervals along the edge of the inner panel; stamping the outer panel to a desired size and shape with the outer panel having a flange forming edge portion adapted to be hemmed over the edge of the inner panel to hem flange the panels together; placing the outer panel on a flat platen; marrying the inner and outer panel by placing the inner panel inside the outer panel with the raised beads facing away from the outer panel and with fixtures which hold the panels against movement relative one another; and hemming the edge of the outer panel over the edge of the inner panel by hemming punch means having a plurality of slots therein located to register with the raised beads of the inner panel so that the edge of the outer panel is coined into interlocking engagement with the raised beads of the inner panel and forms a raised bead on the outer panel which overlies and closely fits around the raised bead of the inner panel of the inner panel to thereby interlock the inner and outer panels together against relative movement.
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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) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |