Patent DE2529079C2 successfully refreshed from Google Patents.
US4439477A
Expired / Lapsed
US
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Fiber mat for producing a three dimensional molded molding by the dry process
Assignee: Lignotock GmbH
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Filing: 1982-12-20
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Granted: 1984-03-27
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Expires: 2002-12-20
Abstract
Abstract A fiber mat for producing a three-dimensional molded molding by the dry process. The fiber mat includes a prestrengthened layer containing cellulose fibers and deformable supporting layers with which the fibrous layer is joined. The fibrous layer is arranged as the central layer between two supporting layers. The supporting layers are formed of creped, low-extension foil material and are joined to the central layer surfaces while maintaining the pulling out properties of the creping.
Inventors
- 👤 Gunter H. Kiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:39
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/558; D04H1/559; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/24463; Y10T428/24628; Y10T428/24669; Y10T428/24686; Y10T428/24802; Y10T428/24917; Y10T428/24934; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
85 words
A fiber mat for producing three-dimensional molded moldings by means of the dry process comprising: a fibrous central layer; a pair of supporting layers joined to opposed sides of the central layer, the supporting layers being formed of creped foil material; and wherein the form and depth of creping of the supporting layers and the overlapping length of the fibers in the central layer are adjusted with respect to each other such that the local elongation of the creping does not interrupt the central layer.
Claim 2
Dependent Claim
85 words
A fiber mat for producing three-dimensional molded moldings by means of the dry process comprising: a fibrous central layer; a pair of supporting layers joined to opposed sides of the central layer, the supporting layers being formed of creped foil material; and wherein the form and depth of creping of the supporting layers and the overlapping length of the fibers in the central layer are adjusted with respect to each other such that the local elongation of the creping does not interrupt the central layer.
Claim 3
Dependent Claim
22 words
The fiber mat of claim 1 wherein the creping of the supporting layers causes less than 50% elongation of the supporting layers.
Claim 4
Dependent Claim
38 words
The fiber mat of claim 1 wherein the form of the creping is configured such that the elongation of the creping and the supporting layers corresponds with one-half of the length of the fibers in the central layer.
Claim 5
Dependent Claim
13 words
The fiber mat of claim 1 wherein the creping comprises juxtaposed parallel folds.
Claim 6
Dependent Claim
12 words
The fiber mat of claim 1 wherein the creping comprises cross-wise folds.
Claim 7
Dependent Claim
24 words
The fiber mat of claim 1 wherein the surfaces of the supporting layers facing the central layer is joined to the latter by adhesion.
Claim 8
Dependent Claim
26 words
The fiber mat of claim 1 wherein the supporting layers are joined together in a punctiform manner at equal intervals by sewing through the central layer.
Claim 9
Dependent Claim
13 words
The fiber mat of claim 7 wherein punctiform connections are dissolved in heat.
Claim 10
Dependent Claim
15 words
The fiber mat of claim 1 wherein the creped supporting layers are provided with perforation.
Claim 11
Dependent Claim
32 words
The fiber mat of claim 1 wherein the central layer has a high proportion of short fibers constituted by waste materials and is creped in the same way as the supporting layers.
Claim 12
Dependent Claim
27 words
The fiber mat of claim 10 wherein the central layer comprises at least one sheet of paper recovered from paper waste and impregnated with a binder material.
Claim 13
Dependent Claim
13 words
The fiber mat of claim 11 wherein the binder is a thermoplastic material.
Claim 14
Dependent Claim
13 words
The fiber mat of claim 11 wherein the binder is a duroplastic material.
Claim 15
Dependent Claim
23 words
The fiber mat of claim 10 wherein the central layer comprises at least one sheet of creped fabric impregnated with a binder material.
Claim 16
Dependent Claim
17 words
The fiber mat of claim 10 wherein the central layer comprises a thermoplastic material filled with cellulose.
Claim 17
Dependent Claim
16 words
The fiber mat of claim 10 wherein the central layer comprises a plurality of interconnected layers.
Claim 18
Dependent Claim
23 words
The fiber mat of claim 1 wherein the creped, foil material is selected from the group consisting of paper plastic and metal fabric.
Claim 19
Dependent Claim
44 words
The fiber mat of claim 1 where the supporting layers are connected to the central layer by means of a bonding agent disposed at predetermined locations between adjacent surfaces of the supporting and central layers, the bonding agent being dissolved during the molding process.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |