US4288903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing stuffing for a spring-type mattress
Assignee: Aisin Corp
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Filing: 1979-08-22
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Granted: 1981-09-15
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Expires: 1999-08-22
Abstract
Abstract A method for producing stuffing for a spring-type mattress, including the steps of forming grooves on the whole circumference of edge portions of upper and lower mold members, fixing dense and sparse seats on flat surfaces of the upper and lower mold members, respectively, bending whole edge portions of both seats into the grooves, inserting and fixing elastic plates into the grooves, pouring a certain predetermined quantity of an undiluted solution of foaming plastics onto the flat surface of the lower mold member and tight contacting both mold member before forming the undiluted solution, horizontally and symmetrically cutting and dividing the stuffing into two parts, turning over the two parts and assembling them so as to cover a spring assembly thereonto thereby covering the two parts by an outer decorative member as a mattress unit.
Inventors
- 👤 Tamio Matsuda
- 👤 Sakuichi Tanikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:36
CPC Classifications
B; B68; B68G; B68G11/00; B68G11/04; B68G11/06; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/5654; B29C33/00; B29C33/42; B29L; B29L2031/00; B29L2031/751; Y; Y10; Y10T; Y10T29/00; Y10T29/48; Y10T29/481; Y10T29/49; Y10T29/49789; Y10T29/49796
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
239 words
A method for producing stuffing to form a spring-type mattress assembly including at least one spring member utilizing upper and lower mold members, which comprises: forming grooves along the entire circumferential edge portions of said upper and lower mold member; fixing a dense seat member on a flat surface of said lower mold member and a relatively less dense seat member on a flat surface of said upper mold member; bending edge portions of each of said seat members into said grooves of said upper and lower mold members; inserting and fixing elastic plates within said grooves of said upper and lower mold members; pouring a predetermined quantity of an undiluted solution of plastics to be foamed onto said flat surface of said lower mold; tightly contacting said upper and lower mold members together for therein expanding and forming said undiluted solution of plastics into a resulting mass, thereby forming a stuffing member integrally composed of said resulting mass, each of said seat members and said plates; horizontally and symmetrically cutting and dividing said stuffing member into a first part and a second comparatively hard part; turning said first and second parts of said stuffing member over and assembling them so as to engage respective elastic plates of said first and second parts and cover said at least one spring; and covering said two parts of said stuffing member by an outer decorative member to form said mattress assembly.
Claim 2
Independent Claim
239 words
A method for producing stuffing to form a spring-type mattress assembly including at least one spring member utilizing upper and lower mold members, which comprises: forming grooves along the entire circumferential edge portions of said upper and lower mold member; fixing a dense seat member on a flat surface of said lower mold member and a relatively less dense seat member on a flat surface of said upper mold member; bending edge portions of each of said seat members into said grooves of said upper and lower mold members; inserting and fixing elastic plates within said grooves of said upper and lower mold members; pouring a predetermined quantity of an undiluted solution of plastics to be foamed onto said flat surface of said lower mold; tightly contacting said upper and lower mold members together for therein expanding and forming said undiluted solution of plastics into a resulting mass, thereby forming a stuffing member integrally composed of said resulting mass, each of said seat members and said plates; horizontally and symmetrically cutting and dividing said stuffing member into a first part and a second comparatively hard part; turning said first and second parts of said stuffing member over and assembling them so as to engage respective elastic plates of said first and second parts and cover said at least one spring; and covering said two parts of said stuffing member by an outer decorative member to form said mattress assembly.
Claim 3
Dependent Claim
33 words
A method for producing a stuffing for a spring-type mattress assembly as set forth in claim 1, which further comprises: forming sloped portions on said grooves of said upper and lower mold member.
Claim 4
Dependent Claim
41 words
A method for producing a stuffing for a spring-type mattress as set forth in claim 2, which further comprises: forming said elastic plates so as to have substantially the same length and slightly larger widths than bottom portions of said grooves.
Claim 5
Dependent Claim
55 words
A method for producing a stuffing for a spring-type mattress as set forth in claim 3, which further comprises: forming concave portions along edge portions of said stuffing member by providing corresponding convex portions on bottom portions of said grooves of said upper and lower mold members prior to pouring said undiluted solution of plastics.
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |