US4382758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing cellulosic fibrous material which can be pressed into molded parts
Assignee: Casimir Kast GmbH and Co KG
•
Filing: 1981-05-18
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Granted: 1983-05-10
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Expires: 2001-05-18
Abstract
Abstract An apparatus for manufacturing cellulosic fibrous material suitable for future compressing into a molded article which comprises a prepulverizing apparatus for cutting cellulosic material, a mixing chamber for mixing the prepulverized cellulosic material with a bonding material, a forming head for receiving the mixture from the mixing chamber and for dispensing the cellulosic fibrous material/binder mixture as a mat upon a moving carrier, a heating apparatus for heating the mat and a pressing apparatus for compacting and bonding the heated fibers in the mat.
Inventors
- 👤 Herbert Nopper
- 👤 Wolfgang Knoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:54
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/04; D; D21; D21H; D21H27/00; D21H5/00; D21H5/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
An apparatus for manufacturing a dry-shaped cellulosic fibrous transportable mat suitable for future compressing into a molded article, comprising: (a) a pre-pulverizing apparatus for cutting and forming cellulosic waste material in dry form into pre-pulverized material, (b) a mixing chamber and grinder for mixing said pre-pulverized material with a bonding material in dry form comprised of at least one thermoplastic bonding agent and one thermosetting bonding agent, (c) a forming head for receiving said mixture from said chamber and for dispensing the mixture as a layer upon a moving carrier, (d) a heating means for plasticizing the thermoplastic bonding agent in said layer without setting of the thermosetting bonding agent therein, (e) a pressure roller for compacting and bonding the layer into a transportable mat, (f) a cooling means for cooling said transportable mat, and (g) a cutter for cutting said transportable mat to select sizes.
Claim 2
Independent Claim
146 words
An apparatus for manufacturing a dry-shaped cellulosic fibrous transportable mat suitable for future compressing into a molded article, comprising: (a) a pre-pulverizing apparatus for cutting and forming cellulosic waste material in dry form into pre-pulverized material, (b) a mixing chamber and grinder for mixing said pre-pulverized material with a bonding material in dry form comprised of at least one thermoplastic bonding agent and one thermosetting bonding agent, (c) a forming head for receiving said mixture from said chamber and for dispensing the mixture as a layer upon a moving carrier, (d) a heating means for plasticizing the thermoplastic bonding agent in said layer without setting of the thermosetting bonding agent therein, (e) a pressure roller for compacting and bonding the layer into a transportable mat, (f) a cooling means for cooling said transportable mat, and (g) a cutter for cutting said transportable mat to select sizes.
Claim 3
Dependent Claim
35 words
The apparatus according to claim 1, wherein said grinder is a jaw grinder comprising friction jaws arranged on the inside of a rotational surface and concentric with striking bars positioned inside of said rotational surface.
Claim 4
Dependent Claim
32 words
The apparatus according to claim 1, wherein said forming head comprises a sieve in the form of a cylinder segment and a brush which is rotatably mounted concentrically inside of said sieve.
Claim 5
Dependent Claim
44 words
The apparatus according to claim 1, wherein said heating apparatus comprises a pressure chamber and a suction chamber, said chambers being positioned on an opposite side of said moving carrier in a manner producing a heated air current for passing through the layer therebetween.
References Cited (Backward Citations)
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US3927235A
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US4167378A
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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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |