Patent US3643308A successfully refreshed from Google Patents.
US3643308A
Expired / Lapsed
US
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Method for manufacturing mattresses
Assignee: France Bed Co Ltd
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Filing: 1970-06-24
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Granted: 1972-02-22
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Expires: 1990-06-24
Abstract
Abstract A method for manufacturing mattresses including a cushion member wrapped in a cover which comprises receiving the cushion member in the cover initially having a larger inner capacity than the volume of the cushion member and formed of fabric woven from heat shrinkable fibers and subjecting the cover to heat shrinkage until the inner capacity of the cover becomes slightly smaller than the volume of the cushion member.
Inventors
- 👤 Haruhiko Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
B; B68; B68G; B68G7/00; B68G7/05; Y; Y10; Y10S; Y10S297/00; Y10S297/01; Y10S297/02; Y10T; Y10T29/00; Y10T29/48; Y10T29/481
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
A method for manufacturing mattresses consisting of a cushion member wrapped in a cover so as to be compressed thereby, which comprises the steps of inserting the cushion member into the cover which initially has a larger inner capacity than the volume of the cushion member and is formed of heat shrinkable fabric, heating the cover to a sufficient temperature to effect its shrinkage until the inner capacity of the fabric finally becomes smaller than the volume of the cushion member.
Claim 2
Independent Claim
81 words
A method for manufacturing mattresses consisting of a cushion member wrapped in a cover so as to be compressed thereby, which comprises the steps of inserting the cushion member into the cover which initially has a larger inner capacity than the volume of the cushion member and is formed of heat shrinkable fabric, heating the cover to a sufficient temperature to effect its shrinkage until the inner capacity of the fabric finally becomes smaller than the volume of the cushion member.
Claim 3
Dependent Claim
22 words
A method according to claim 1 wherein the cover fabric is woven from warps and woofs having substantially the same heat shrinkability.
Claim 4
Dependent Claim
29 words
A method according to claim 2 wherein the warps and woofs constituting the cover fabric respectively consist of a plurality of fibers prepared from a single kind of material.
Claim 5
Dependent Claim
30 words
A method according to claim 2 wherein the warps and woofs constituting the cover fabric are respectively formed of a plurality of fibers prepared from two or more different materials.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |