Patent US5076771A successfully refreshed from Google Patents.
Patent US3909918A successfully refreshed from Google Patents.
US3909918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining the edge portions of two sheets
Assignee: Nissan Motor Co Ltd
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Filing: 1974-01-29
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Granted: 1975-10-07
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Expires: 1994-01-29
Abstract
Abstract To provide reinforcement to a lock joint between sheet metal members which are seamed together, at least one raised portion and a suitably configured protuberance are formed respectively in the sheet metal parts, wherein the raised portion and the protuberance are held in close engagement with each other so that the sheet metal members are, once combined together, prevented from being displaced from their respective relative positions.
Inventors
- 👤 Hideo Takizawa
- 👤 Hiroyuki Aida
- 👤 Yoshiyuki Miyabayashi
- 👤 Norihiro Tsuneishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:39
CPC Classifications
F; F16; F16B; F16B5/00; 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
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
278 words
A method of joining two sheets at their edges, comprising the steps of: a. bending an edge of one sheet to form a first predetermined angle with a reference surface of the one sheet; b. placing the sheets together so that an edge portion of the other sheet extends beyond the bent edge of the one sheet; c. folding the edge portion of the other sheet back over the first sheet so that mating surfaces of the two sheets are in tight contact and the bent edge of the one sheet is enclosed by the folded over edge portion of the other sheet; d. bending an edge of the other sheet to form a second predetermined angle with a reference surface of the other sheet; prior to performing step b; and in which the sheets are relatively oriented during step b so that when step c is performed, the bent edge of the one sheet will be folded over the bent edge of the other sheet, and the bent edge of the other sheet will be folded over the bent edge of the one sheet; and e. forming a raised portion on the one sheet near the bent edge thereof extending normally from the one sheet in the same direction as the bent edge thereof; the raised portion being spaced from the bent edge of the one sheet so that when step c is performed, the folded bent edges of the sheets will be spaced between the raised portion and the folded back end of the other sheet, and the raised portion will engage with the folded bent edge of the other sheet to prevent relative movement thereof.
Claim 2
Independent Claim
278 words
A method of joining two sheets at their edges, comprising the steps of: a. bending an edge of one sheet to form a first predetermined angle with a reference surface of the one sheet; b. placing the sheets together so that an edge portion of the other sheet extends beyond the bent edge of the one sheet; c. folding the edge portion of the other sheet back over the first sheet so that mating surfaces of the two sheets are in tight contact and the bent edge of the one sheet is enclosed by the folded over edge portion of the other sheet; d. bending an edge of the other sheet to form a second predetermined angle with a reference surface of the other sheet; prior to performing step b; and in which the sheets are relatively oriented during step b so that when step c is performed, the bent edge of the one sheet will be folded over the bent edge of the other sheet, and the bent edge of the other sheet will be folded over the bent edge of the one sheet; and e. forming a raised portion on the one sheet near the bent edge thereof extending normally from the one sheet in the same direction as the bent edge thereof; the raised portion being spaced from the bent edge of the one sheet so that when step c is performed, the folded bent edges of the sheets will be spaced between the raised portion and the folded back end of the other sheet, and the raised portion will engage with the folded bent edge of the other sheet to prevent relative movement thereof.
Claim 3
Independent Claim
223 words
A method of joining first and second sheets at their edges, comprising the steps of: a. bending an end portion of a first sheet to form an angle with respect to a mating surface of the first sheet and bending an end portion of a second sheet to form an angle with respect to a mating surface of the second sheet; b. forming a raised portion on the first sheet near the bent edge thereof extending normally from the first sheet in the same direction as the bent edge thereof; c. overlaying the first sheet and second sheet mating surfaces on each other so that the bent end portions of the first and second sheets are coextensive with and spaced from each other; d. bending a portion of the second sheet adjacent the bent end portion of the first sheet back over so that the bent end of the second sheet engages with the bent end of the first sheet; And e. pressing the engaged both ends of the first and second sheets so that said engaged both ends fold together and form a folded portion which abuts the raised portion in a manner that the folded portion is located between the raised portion and the outer edge of the folded portion to prevent the relative movement of the first and second sheets.
Claim 4
Independent Claim
223 words
A method of joining first and second sheets at their edges, comprising the steps of: a. bending an end portion of a first sheet to form an angle with respect to a mating surface of the first sheet and bending an end portion of a second sheet to form an angle with respect to a mating surface of the second sheet; b. forming a raised portion on the first sheet near the bent edge thereof extending normally from the first sheet in the same direction as the bent edge thereof; c. overlaying the first sheet and second sheet mating surfaces on each other so that the bent end portions of the first and second sheets are coextensive with and spaced from each other; d. bending a portion of the second sheet adjacent the bent end portion of the first sheet back over so that the bent end of the second sheet engages with the bent end of the first sheet; And e. pressing the engaged both ends of the first and second sheets so that said engaged both ends fold together and form a folded portion which abuts the raised portion in a manner that the folded portion is located between the raised portion and the outer edge of the folded portion to prevent the relative movement of the first and second sheets.
Claim 5
Dependent Claim
27 words
A method as claimed in claim 2, in the step a of which, the two angles respectively formed on said first and second sheets are generally rectangular.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |