US3858759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for volumeric feeding of fibrous material
Assignee: LUBENOW ROBERT W
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Filing: 1971-12-17
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Granted: 1975-01-07
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Expires: 1991-12-17
Abstract
Abstract A method for the controlled volumetric feeding of fibrous materials such as fiber glass and asbestos which comprises the steps of forming a feed reservoir of the fibrous material; compressing the fibrous material in the reservoir; moving pronged conveying means through the compressed material at the reservoir discharge, thereby entraining the fibrous material on the pronged conveying means; confining the entrained fibrous material on the pronged conveying means; and removing the entrained material. Apparatus for use in the method includes at least one hopper for the fibrous material, having an open bottom; means for applying a compressive force to the fibrous material in the hopper; conveying means for receiving the fibrous material from the hopper having a plurality of prongs for entraining the fibrous material; means for driving the conveying means past the open hopper bottom whereby said fibrous material is forced by said compressive force onto the prongs; confining means for holding the entrained material on the prongs after advancing past the open hopper bottom; and means for removing the entrained fibrous material from the prongs.
Inventors
- 👤 Lewis W Lubenow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:57
CPC Classifications
D; D01; D01G; D01G23/00; D01G23/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
Apparatus for the volumetric feeding of fibrous materials comprising at least one hopper for said fibrous material, said hopper having an open bottom; means for appLying a compressive force to said fibrous material in said hopper; conveying means for receiving said fibrous material from said hopper, said conveying means including a plurality of prongs for entraining said fibrous material; means for driving said conveying means past said open hopper bottom whereby said fibrous material is forced by said compressive force onto said prongs; confining means for forming and holding a layer of said entrained material on said prongs after advancing past said open hopper bottom, said confining means being a plate pivoted at one end and having a surface corresponding to the shape of said conveying means; and means for removing said entrained fibrous material from said prongs.
Claim 2
Dependent Claim
138 words
Apparatus for the volumetric feeding of fibrous materials comprising at least one hopper for said fibrous material, said hopper having an open bottom; means for appLying a compressive force to said fibrous material in said hopper; conveying means for receiving said fibrous material from said hopper, said conveying means including a plurality of prongs for entraining said fibrous material; means for driving said conveying means past said open hopper bottom whereby said fibrous material is forced by said compressive force onto said prongs; confining means for forming and holding a layer of said entrained material on said prongs after advancing past said open hopper bottom, said confining means being a plate pivoted at one end and having a surface corresponding to the shape of said conveying means; and means for removing said entrained fibrous material from said prongs.
Claim 3
Dependent Claim
63 words
Apparatus in accordance with claim 1 wherein said means for applying said compressive force are adjustable and said plate is operatively linked to an automatic control means adapted to increase or decrease the pressure medium to said compressive means in response to changes in the position of said pivoted plate whereby the volumetric rate of flow of said fibrous material is substantially constant.
Claim 4
Dependent Claim
57 words
Apparatus in accordance with claim 1 wherein said means for driving is adjustable and said plate is operatively linked to an automatic control means adapted to increase or decrease the speed of said driving means in response to changes in position of said plate whereby the volumetric rate of flow of said fibrous material is substantially constant.
Claim 5
Dependent Claim
27 words
Apparatus in accordance with claim 1 wherein said conveying means comprise a rotatable drum with a flexible belt having spaced projecting prongs secured to said drum surface.
Claim 6
Dependent Claim
27 words
Apparatus in accordance with claim 1 wherein said conveying means comprise a flexible belt having spaced projecting prongs and a flexible, perforated belt overlying said pronged belt.
Claim 7
Dependent Claim
31 words
Apparatus in accordance with claim 1 wherein said conveying means comprises an endless belt having spaced prongs projecting from its outer surface throughout the entire length and width of said belt.
Claim 8
Dependent Claim
23 words
Apparatus in accordance with claim 1 wherein said discharge means is a scraper having longitudinal slots to allow said prongs to pass therethrough.
Claim 9
Dependent Claim
53 words
Apparatus in accordance with claim 1 wherein the speed of said means for driving is adjustable and said fibrous material is discharged onto a weigh belt having a continuously operative load cell which is operatively connected to control said speed to maintain a substantially constant weight of fibrous material on said weigh belt.
Claim 10
Dependent Claim
42 words
Apparatus is accordance with claim 1 wherein said means for applying a compressive force comprises a hydraulic or pneumatic cylinder capable of applying a variable force to material in said hopper whereby a gradually diminishing force can be applied to said material.
References Cited (Backward Citations)
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US2403384A
Cited
US2938239A
Cited
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |