US4253413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sewing apparatus for air cushions
Assignee: Motors Liquidation Co
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Filing: 1979-07-25
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Granted: 1981-03-03
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Expires: 1999-07-25
Abstract
Abstract An automatic sewing apparatus for air cushions that includes a carriage having four circular tables that are sequentially movable to a plurality of circumferentially spaced work stations for receiving a pair of circular sheets of fabric and for sewing the peripheral portion thereof. Each table is combined with a circular cover that pivots into engagement with the sheets of fabric located on the associated table so as to maintain the sheets in position while the peripheral portion is being sewn.
Inventors
- 👤 Stanley E. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:36
CPC Classifications
D; D05; D05B; D05B21/00; D05B21/007; D05D; D05D2207/00; D05D2207/02; D05D2207/04; D10; D10B; D10B2505/00; D10B2505/12; D10B2505/124
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A method of sewing a pair of equal diameter circular sheets of fabric together to form a restraint cushion for a vehicle, comprising the steps of placing one of said pair of sheets on a rotatable circular table having a diameter less than the diameter of said sheets so that the peripheral portion of said sheets extends uniformly beyond the circumferential edge of said table, placing the other of said pair of sheets onto said one of said sheets in concentric relationship therewith, moving a cover onto said pair of sheets so as to maintain the latter in a fixed position on said table while applying a restraining force to said table to prevent the latter from rotating, positioning the table adjacent a sewing machine and simultaneously releasing said restraining force so as to allow said table to freely rotate as the peripheral portion of said sheets is sewn together by said sewing machine.
Claim 2
Independent Claim
154 words
A method of sewing a pair of equal diameter circular sheets of fabric together to form a restraint cushion for a vehicle, comprising the steps of placing one of said pair of sheets on a rotatable circular table having a diameter less than the diameter of said sheets so that the peripheral portion of said sheets extends uniformly beyond the circumferential edge of said table, placing the other of said pair of sheets onto said one of said sheets in concentric relationship therewith, moving a cover onto said pair of sheets so as to maintain the latter in a fixed position on said table while applying a restraining force to said table to prevent the latter from rotating, positioning the table adjacent a sewing machine and simultaneously releasing said restraining force so as to allow said table to freely rotate as the peripheral portion of said sheets is sewn together by said sewing machine.
Claim 3
Independent Claim
218 words
A method of automatically sewing a pair of circular sheets of fabric together with a sewing machine to form a restraint cushion using a carriage supported for rotation about a vertical axis and having a plurality of circular tables mounted on the carriage for independent rotation, said method comprising the steps of depositing one of said pair of circular sheets on one of said circular tables so that the peripheral portion of said one of said circular sheets extends uniformly beyond the circumferential edge of said one of said circular tables, applying a restraining force to said one of said circular tables to prevent rotation thereof, moving said one of said circular tables to a first position spaced from said sewing machine and depositing the other of said sheets in concentric relationship with said one of said sheets, positioning a cover onto said pair of sheets so as to maintain said pair of circular sheets in a fixed position on said one of said circular tables, and moving said one of said circular tables to a second position adjacent said sewing machine while simultaneously releasing said restraining force so as to allow said one of said circular tables to freely rotate as said peripheral portion of said pair of circular sheets is sewn together by said sewing machine.
Claim 4
Independent Claim
218 words
A method of automatically sewing a pair of circular sheets of fabric together with a sewing machine to form a restraint cushion using a carriage supported for rotation about a vertical axis and having a plurality of circular tables mounted on the carriage for independent rotation, said method comprising the steps of depositing one of said pair of circular sheets on one of said circular tables so that the peripheral portion of said one of said circular sheets extends uniformly beyond the circumferential edge of said one of said circular tables, applying a restraining force to said one of said circular tables to prevent rotation thereof, moving said one of said circular tables to a first position spaced from said sewing machine and depositing the other of said sheets in concentric relationship with said one of said sheets, positioning a cover onto said pair of sheets so as to maintain said pair of circular sheets in a fixed position on said one of said circular tables, and moving said one of said circular tables to a second position adjacent said sewing machine while simultaneously releasing said restraining force so as to allow said one of said circular tables to freely rotate as said peripheral portion of said pair of circular sheets is sewn together by said sewing machine.
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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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |