US4539057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing an elastic body with protective layer
Assignee: Individual
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Filing: 1984-03-15
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Granted: 1985-09-03
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Expires: 2004-03-15
Abstract
Abstract Hospital mattresses are generally made of foam plastic having predominantly open cell cores and are in the form of a parallel-epipedic block which is provided with a protective layer consisting of a plastic film which is easy to clean so that injurious substances and bacteria can be removed. Such mattresses have the drawback, however, that when used they produce sounds which are disturbing. These sounds are eliminated in accordance with the present invention by arranging a layer of fabric between the outer surface of the foam plastic block and the protective layer.
Inventors
- 👤 Lars Ahlm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:36
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/48; A61F5/485; A47; A47C; A47C27/00; A47C27/002; A47C27/005; A47C31/00; A47C31/10; A47C31/105; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530802; A61F2013/53445; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249982; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T442/00; Y10T442/20; Y10T442/2738; Y10T442/60; Y10T442/647
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A method for producing an integrated elastic body of increased noise suppression comprising a predominantly open cell foam plastic core having upper and lower surfaces, longitudinal surfaces and transverse surfaces, and an outer non-permeable plastic layer overlying and secured to said core, comprising the steps of: (A) positioning an inner, noise suppressing fabric layer overlying said upper and lower surfaces and said longitudinal surfaces of said core; (B) adhering said fabric layer to said core over at least a portion of the surface of said core; (C) positioning said outer layer overlying said adhered inner layer and adjacent said upper and lower surfaces and said longitudinal surfaces of said core; and (D) adhering said outer layer to said inner layer and said core over at least a portion of the surface of said core, thereby forming said integrated elastic body.
Claim 2
Independent Claim
140 words
A method for producing an integrated elastic body of increased noise suppression comprising a predominantly open cell foam plastic core having upper and lower surfaces, longitudinal surfaces and transverse surfaces, and an outer non-permeable plastic layer overlying and secured to said core, comprising the steps of: (A) positioning an inner, noise suppressing fabric layer overlying said upper and lower surfaces and said longitudinal surfaces of said core; (B) adhering said fabric layer to said core over at least a portion of the surface of said core; (C) positioning said outer layer overlying said adhered inner layer and adjacent said upper and lower surfaces and said longitudinal surfaces of said core; and (D) adhering said outer layer to said inner layer and said core over at least a portion of the surface of said core, thereby forming said integrated elastic body.
Claim 3
Dependent Claim
61 words
A method for producing an integrated elastic body according to claim 1, wherein said inner fabric layer is adhered to said core by the step of heating the surface of said core sufficiently to plasticize at least a portion of said core surface to adhere said fabric layer to said core by the plasticized portion of the core when is solidifies.
Claim 4
Dependent Claim
96 words
A method for producing an integrated elastic body according to claim 1, wherein the step of adhering said outer plastic layer to said inner fabric layer and said core is accomplished by the step of heating the surface of said core sufficiently to plasticize at least a portion of said core surface to cause at least a portion of the plasticized core surface to penetrate said inner fabric layer and contact said outer layer to adhere said outer layer to said inner fabric layer and said core upon solidification of the plasticized portion of the core.
Claim 5
Dependent Claim
81 words
A method for producing an integrated elastic body according to claim 1, wherein the step of adhering the inner noise suppressing fabric layer to said core is accomplished by the steps of providing an attachment strip coated on both sides with an adhesive; and interposing said adhesive coated strip between at least a portion of the surface of said core and said fabric layer to join at least a portion of the surface of said core and said fabric layer together.
Claim 6
Dependent Claim
81 words
A method for producing an integrated elastic body according to claim 1, wherein the step of adhering said outer layer to said inner fabric layer and said core is accomplished by the steps of providing an attachment strip coated on both sides with an adhesive; and interposing said adhesive coated strip between said outer layer and said inner fabric layer to join said outer layer, said inner fabric layer, and at least a portion of the surface of said core together.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |