US3766607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transferring and compacting fiber material
Assignee: Curlator Corp
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Filing: 1971-08-24
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Granted: 1973-10-23
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Expires: 1991-08-24
Abstract
Abstract The upper and lower walls of the air duct which conveys fibers from the lickerin to the condenser in a machine for forming random fiber webs are serrated; and the forward side of each serration is provided with apertures through which jets of air operate to compact, stabilize, and advance the airborne fibers which pass through the duct. The jet openings on the forward sides of successive serrations or teeth are preferably arranged in staggered fashion relative to one another.
Inventors
- 👤 W Jende
- 👤 K Krosswang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:15
CPC Classifications
D; D01; D01G; D01G25/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
In apparatus for forming a random fiber web, a duct through which fibers suspended in air may be conveyed, said duct having a top wall and a bottom wall, said walls diverging from one another longitudinally of the duct, each wall being serrated and having serrations extending crosswise of the duct, a rotary lickerin disposed adjacent the inlet end of the duct for combing fibers from a mat fed to the lickerin, a movable foraminous condenser disposed adjacent the outlet end of the duct, and means for directing an air stream tangentially of said lickerin so that fibers are doffed therefrom by centrifugal force and by the force of said air stream and the doffed fibers are conveyed through the duct by the air steam from the lickerin for deposit on said condenser, said serrations having nozzle openings through their front faces, and means for directing air through said openings forwardly of the duct for compacting and stabilizing the fibers as they flow through the duct.
Claim 2
Dependent Claim
166 words
In apparatus for forming a random fiber web, a duct through which fibers suspended in air may be conveyed, said duct having a top wall and a bottom wall, said walls diverging from one another longitudinally of the duct, each wall being serrated and having serrations extending crosswise of the duct, a rotary lickerin disposed adjacent the inlet end of the duct for combing fibers from a mat fed to the lickerin, a movable foraminous condenser disposed adjacent the outlet end of the duct, and means for directing an air stream tangentially of said lickerin so that fibers are doffed therefrom by centrifugal force and by the force of said air stream and the doffed fibers are conveyed through the duct by the air steam from the lickerin for deposit on said condenser, said serrations having nozzle openings through their front faces, and means for directing air through said openings forwardly of the duct for compacting and stabilizing the fibers as they flow through the duct.
Claim 3
Dependent Claim
22 words
Apparatus as claimed in claim 1, wherein the openings through the front faces of the serrations are staggered from serration to serration.
Claim 4
Dependent Claim
55 words
Apparatus as claimed in claim 1, wherein a by-pass is connected to said duct adjacent its inlet opening, and adjustable means is provided to control the amount of air exhausting from said duct through said by-pass, and means is provided connecting said by-pass at least with the jets in the bottom wall of said duct.
Claim 5
Dependent Claim
32 words
Apparatus as claimed in claim 3, wherein an atomizer is connected to said by-pass to supply atomized water droplets to at least the air supplied to the jets in said bottom wall.
Claim 6
Dependent Claim
150 words
In apparatus for forming a random fiber web, having a duct through which fibers are conveyed in an air stream, said duct having an inlet opening at one end and an outlet at its other end, means for directing an air stream with fibers suspended therein into said inlet opening, and a movable foraminate condenser disposed at the outlet end of said duct on which the fibers are deposited, said duct having at least its bottom wall serrated with the serrations extending crosswise of the duct, said serrations having air jet openings through their front faces for directing air streams forwardly of the duct for conveying fibers through the duct and for forming an air cushion on which the fibers ride as they flow with the stream through the duct, and by which the fibers are stabilized in a median position of the duct as they travel through the duct.
Claim 7
Dependent Claim
150 words
In apparatus for forming a random fiber web, having a duct through which fibers are conveyed in an air stream, said duct having an inlet opening at one end and an outlet at its other end, means for directing an air stream with fibers suspended therein into said inlet opening, and a movable foraminate condenser disposed at the outlet end of said duct on which the fibers are deposited, said duct having at least its bottom wall serrated with the serrations extending crosswise of the duct, said serrations having air jet openings through their front faces for directing air streams forwardly of the duct for conveying fibers through the duct and for forming an air cushion on which the fibers ride as they flow with the stream through the duct, and by which the fibers are stabilized in a median position of the duct as they travel through the duct.
Claim 8
Dependent Claim
23 words
Apparatus as claimed in claim 5, wherein the jet openings in the front walls of successive serrations are staggered, relative to one another.
References Cited (Backward Citations)
US1761493A
Cited
US3544414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |