Patent EP0118361A2 successfully refreshed from Google Patents.
EP0118361A2
Expired / Lapsed
EP
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Formation of nonwoven webs or batts from continuous filament tow or yarn strands
Assignee: Fram Corp
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Filing: 1984-02-29
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Granted: —
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Expires: 2004-02-29
Abstract
Abstract A method and machine for forming nonwoven batts containing refractory fibers such as carbon, glass, ceramic or metallic fibers, includes a conveying table (12) provided with scalloped rollers (90, 92) which separate tows of filaments (16) and spread the filaments on a conveying table. A feed roller (80) holds the filaments on the table so that they are conveyed to a rotating lickerin (60). The lickerin (60) is provided with teeth (62) which grasp the filaments so that a tensile force is applied thereto, thereby breaking the filaments at structurally weak points in the filaments. The fibers are mixed with textile fibers and transferred to a foraminous condenser (144) by blowing the fibers through a duct (112). The fibers are arranged on the conveyor (114) in a random fashion to form a batt.
Inventors
- 👤 Edward Allen Vaughn
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 10:35
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/72; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; D04H1/4234; D04H1/4242
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
55 words
Method of forming nonwoven batts of random fibers comprising the steps of breaking individual filaments into relatively short lengths by applying a tensile force on said filaments to break said filaments at a relatively weak point in the filament, and d e-positing the relatively short lengths of said filaments in random fashion on a condenser.
Claim 2
Dependent Claim
55 words
Method of forming nonwoven batts of random fibers comprising the steps of breaking individual filaments into relatively short lengths by applying a tensile force on said filaments to break said filaments at a relatively weak point in the filament, and d e-positing the relatively short lengths of said filaments in random fashion on a condenser.
Claim 3
Dependent Claim
31 words
Method as claimed in claim 1, wherein said filaments are bundled into tows, and said method includes the step of separating said tows into individual filaments before applying said tensile force.
Claim 4
Dependent Claim
25 words
Method as claimed in claim 2, wherein said method includes the step of arranging said filaments in a substantially parallel arrangement on a conveying table.
Claim 5
Dependent Claim
33 words
Method as claimed in claim 3, wherein said method includes the step of holding said filaments against said conveying table and using said conveying table to move said filaments toward a rotating lickerin.
Claim 6
Dependent Claim
47 words
Method as claimed in claim 4, wherein said tensile force is applied to said filaments by engaging said filaments with said lickerin while holding said filaments against said conveying table, and rotating said lickerin at a surface speed faster than the surface speed of said conveying table.
Claim 7
Dependent Claim
26 words
hethod as claimed in claim 1, wherein said short lengths of said filaments are deposited on said condenser by blowing said short lengths through a duct.
Claim 8
Dependent Claim
30 words
Method as claimed in claim 3, wherein said filaments are separated from the tows and arranged on said conveying table by feeding said tows through a pair of serrated rollers.
Claim 9
Dependent Claim
52 words
Method as claimed in claim 1, wherein said tensile force is applied to said filaments by feeding the filaments into a rotating lickerin, causing said lickerin to grasp the filaments, and rotating the lickerin at a surface speed greater than the surface speed at which said filaments are fed to the lickerin.
Claim 10
Dependent Claim
34 words
Method as claimed in claim 8, wherein said filaments are fed to the lickerin on a conveying table and are held against the conveying table as the latter feeds the filaments to the lickerin.
Claim 11
Dependent Claim
45 words
Method as claimed in claim 9, wherein said filaments are fed to the conveying table in tows and are separated into individual filaments as said tows are fed to the conveying table, said filaments being arranged on said conveying table substantially parallel to one another.
Claim 12
Dependent Claim
20 words
Method as claimed in claim 10, including the step of pneumatically conveying the fibers from the lickerin to said condenser.
Claim 13
Dependent Claim
95 words
Machine for forming a random web comprising a rotating lickerin, a conveying table driven at a predetermined surface speed for feeding filaments to said lickerin, a feed roll for holding the filaments against the table, means on said lickerin for grasping the filaments to apply a tensile force thereto as the filaments are fed to the lickerin to break said filaments at a structurally weak point in the filament between the lickerin and the grasping means, and means to drive said lickerin at a surface speed greater than the surface speed of the conveying table.
Claim 14
Dependent Claim
95 words
Machine for forming a random web comprising a rotating lickerin, a conveying table driven at a predetermined surface speed for feeding filaments to said lickerin, a feed roll for holding the filaments against the table, means on said lickerin for grasping the filaments to apply a tensile force thereto as the filaments are fed to the lickerin to break said filaments at a structurally weak point in the filament between the lickerin and the grasping means, and means to drive said lickerin at a surface speed greater than the surface speed of the conveying table.
Claim 15
Dependent Claim
38 words
Machine according to claim 12, wherein said filaments are fed to the conveying table in tows, and means for separating the tows into individual filaments and arranging the filaments in a substantially parallel relationship on said conveying table.
Claim 16
Dependent Claim
30 words
Machine according to c:ahn 13, wherein said filaments are made of carbon, and means to feed fibers other than carbon fibers to said lickerin to combine with the carbon filaments.
Claim 17
Dependent Claim
30 words
Machine according to c:ahn 13, wherein said filaments are made of carbon, and means to feed fibers other than carbon fibers to said lickerin to combine with the carbon filaments.
Claim 18
Dependent Claim
16 words
Machine according to claim 13, wherein said grasping means is a toothed surface on the lickerin.
Claim 19
Dependent Claim
43 words
Machine according to claim 13, further including a feed roller located over said conveying table and holding said filaments against said conveying table as the filaments are fed toward the lickerin to permit the lickerin to apply said tensile force to the filaments.
Claim 20
Dependent Claim
38 words
Machine according to claim 16, wherein said separating means includes a pair of serrated rollers, said tows being fed between said rollers which separate the individual filaments from one another and guide the latter onto the conveying table.
References Cited (Backward Citations)
No citation records indexed.
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