US3765989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for crosslaying web materials
Assignee: Kimberly Clark Corp
•
Filing: 1971-08-06
•
Granted: 1973-10-16
•
Expires: 1991-08-06
Abstract
Abstract A method and apparatus for efficiently handling and crosslaying webs of substantially alignd light-weight fibers in the production of non-woven materials incorporating such crosslaid fibers for two-dimensional strength. Webs of substantially aligned fibers are conveyed along a first permeable carrier with their fibers oriented in the direction of travel and are transferred to a second moving permeable carrier crossing in closely spaced parallel relation by directing an air flow through said permeable carriers when each web length reaches the position between the crossing carriers. The air flow causes the lightweight web length to be removed from the first carrier and to be positioned and held against the other moving carrier with the web fibers oriented thereon transversely to the direction of travel. The illustrated apparatus includes two such carrier systems for changing the orientation of web lengths with respect to their direction of travel, and these systems alternately present web lengths to a continuous moving fiber web to form an uninterrupted ply of crosslaid fibers thereon. Two adhesively coated cover sheets are then applied to contain the crosslaid fibers and form a composite non-woven material.
Inventors
- 👤 W Burger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:09
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/74; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
335 words
Apparatus for fabricating a nonwoven material having highly oriented crosslaid materials therein, means for separating into discrete lengths a fragile web of material having a principal strength component oriented substantially in the longitudInal direction of the material, a first moving carrier made of permeable material, means for placing lengths of said web on said first carrier at spaced intervals with said web strength components oriented in the direction of travel, another moving carrier cross parallel to first carrier made of permeable material, said first carrier being operable to convey each said web length to the position where said carriers cross, means for transferring said lengths from said first carrier to said other carrier when each said web length reaches said position, said other moving carrier receiving and conveying said transferred web lengths with their strength components oriented transversely to the direction of travel, means for placing other lengths of said web on a second moving carrier at spaced intervals with said web strength components oriented in the direction of travel, another moving carrier cross parallel to said second carrier made of permeable material, said second carrier being operable to convey each said other web length to the position where said carriers cross, means for transferring said other web lengths from said second carrier to said other crossing carrier when each web length reaches said position, each transferring means including an air pressure unit which creates an air flow through said crossing permeable carriers when each web length reaches the position where said carriers cross, said air flow causing each web length to be removed from the carrier on which it is conveyed and be held against the other crossing carrier, said second other carrier receiving and conveying said transferred web lengths with their strength components oriented transversely to the direction of travel of said other carrier, and a continuous moving medium receiving said lengths of web from said other carriers with the web strength components oriented transversely to the direction of travel of said medium.
Claim 2
Dependent Claim
335 words
Apparatus for fabricating a nonwoven material having highly oriented crosslaid materials therein, means for separating into discrete lengths a fragile web of material having a principal strength component oriented substantially in the longitudInal direction of the material, a first moving carrier made of permeable material, means for placing lengths of said web on said first carrier at spaced intervals with said web strength components oriented in the direction of travel, another moving carrier cross parallel to first carrier made of permeable material, said first carrier being operable to convey each said web length to the position where said carriers cross, means for transferring said lengths from said first carrier to said other carrier when each said web length reaches said position, said other moving carrier receiving and conveying said transferred web lengths with their strength components oriented transversely to the direction of travel, means for placing other lengths of said web on a second moving carrier at spaced intervals with said web strength components oriented in the direction of travel, another moving carrier cross parallel to said second carrier made of permeable material, said second carrier being operable to convey each said other web length to the position where said carriers cross, means for transferring said other web lengths from said second carrier to said other crossing carrier when each web length reaches said position, each transferring means including an air pressure unit which creates an air flow through said crossing permeable carriers when each web length reaches the position where said carriers cross, said air flow causing each web length to be removed from the carrier on which it is conveyed and be held against the other crossing carrier, said second other carrier receiving and conveying said transferred web lengths with their strength components oriented transversely to the direction of travel of said other carrier, and a continuous moving medium receiving said lengths of web from said other carriers with the web strength components oriented transversely to the direction of travel of said medium.
Claim 3
Dependent Claim
120 words
The apparatus of claim 1 in which said placing means includes a pair of juxtaposed screen rolls, said first carrier being movable about one of said screen rolls and said second carrier being movable about the other screen roll, said screen rolls forming a nip between said first and second carriers through which said web lengths pass, said screen rolls each having a suction pressure acting over a portion of their circumferences and said suction portions engage alternate lengths of said web and direct them along the respective carrier associated with that screen roll, and said moving medium receives said web lengths from said other carriers in alternate succession to form an uninterrupted ply of crosslaid webs on said medium.
Claim 4
Dependent Claim
98 words
The apparatus of claim 1 in which said separating means is a pair of juxtaposed screen rolls which form a nip through which said web is drawn, said screen rolls each having a suction pressure acting over half of their circumferences and being rotatable out of phase with each other so that said screen roll suction portions alternately engage said web and separate it into lengths corresponding to the circumferential length of the screen roll suction portion, and said first and second carriers each being operable about one of said screen rolls to receive said alternate web lengths.
Claim 5
Dependent Claim
50 words
The apparatus of claim 1 in which said separating means includes a rotatable knife roll and a juxtaposed rotatable anvil roll which form a nip, said web being drawn through said nip and being severed by said knife roll into equal lengths corresponding to the circumference of said knife roll.
Claim 6
Dependent Claim
79 words
The apparatus of claim 1 in which said web comprises substantially aligned multiple slivers of staple length fibers, said fibers being oriented in the longitudinal direction of the web and forming the principal strength component of said web, and said moving medium is a continuous web of fibers substantially aligned in the direction of travel, said continuous web successively receiving alternate web lengths from said other carriers to form an uninterrupted ply of crosslaid fibers over saiD continuous web.
Claim 7
Dependent Claim
39 words
The apparatus of claim 5 including a continuous moving sheet of cover material, means for applying an adhesive to said cover material and means for combining said adhesively coated cover sheet and said continuous web with crosslaid web lengths.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |