Patent US3909891A successfully refreshed from Google Patents.
US3909891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needling Apparatus
Assignee: Oskar Dilo Maschinenfabrik KG
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Filing: 1974-07-08
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Granted: 1975-10-07
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Expires: 1994-07-08
Abstract
Abstract A non-woven multi-layered textile web having felt-like surface patterns is made by delivering a sequence of non-woven textile layers to a continuously rotating elongated drum. A plurality of needling units are angularly spaced about the circumference of the drum, each needling unit carrying a plurality of barbed needles arranged to impart a surface pattern upon reciprocation at predetermined intervals in a radial direction in a plane perpendicular to the drum axis for moving the needles into and out of peripheral grooves in the drum. In this manner, the needling units sequentially needle the layers and form the web with the patterns of superposed layers during the continuous rotation of the drum. The reciprocation of the needling units is preferably programmed.
Inventors
- 👤 Richard Dilo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:50
CPC Classifications
D; D04; D04H; D04H18/00; D04H18/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
225 words
An apparatus for making a non-woven textile web having feltlike surface patterns, comprising 1. a continuously rotating elongated drum having an axis and defining a multiplicity of adjacent circumferential grooves. 2. a plurality of needling units angularly spaced about correspondingly spaced arcuate circumferential sectors of the drum, each needling unit carrying a plurality of needles arranged to impart a surface pattern, 3. means for reciprocating each of the needling units at predetermined intervals in a radial direction in a plane perpendicular to the drum axis for moving the needles into and out of the circumferential grooves of the drum in the corresponding arcuate sector thereof, and 4. a like plurality of means arranged to deliver a sequence of non-woven textile layers tangentially to the continuously rotating drum and To respective ones of the arcuate sectors thereof, each delivery means being arranged ahead of a corresponding one of the drum, whereby the needling units sequentially needle the layers and form the web with felt-like surface patterns of superposed ones of said layers during the continuous rotation of the drum as the needles are moved through the layers into and out of the circumferential grooves of the drum supporting the layers. 2. The apparatus of claim 1, furhter comprising means for adjusting the radial distance of each of said needling units from the surface of the drum.
Claim 2
Dependent Claim
30 words
a plurality of needling units angularly spaced about correspondingly spaced arcuate circumferential sectors of the drum, each needling unit carrying a plurality of needles arranged to impart a surface pattern,
Claim 3
Dependent Claim
30 words
a plurality of needling units angularly spaced about correspondingly spaced arcuate circumferential sectors of the drum, each needling unit carrying a plurality of needles arranged to impart a surface pattern,
Claim 4
Dependent Claim
44 words
means for reciprocating each of the needling units at predetermined intervals in a radial direction in a plane perpendicular to the drum axis for moving the needles into and out of the circumferential grooves of the drum in the corresponding arcuate sector thereof, and
Claim 5
Dependent Claim
44 words
means for reciprocating each of the needling units at predetermined intervals in a radial direction in a plane perpendicular to the drum axis for moving the needles into and out of the circumferential grooves of the drum in the corresponding arcuate sector thereof, and
Claim 6
Dependent Claim
24 words
The apparatus of claim 2, wherein the reciprocating means comprises a pressure fluid operated motor mounted between the adjusting means and the needling unit.
Claim 7
Dependent Claim
118 words
a like plurality of means arranged to deliver a sequence of non-woven textile layers tangentially to the continuously rotating drum and To respective ones of the arcuate sectors thereof, each delivery means being arranged ahead of a corresponding one of the drum, whereby the needling units sequentially needle the layers and form the web with felt-like surface patterns of superposed ones of said layers during the continuous rotation of the drum as the needles are moved through the layers into and out of the circumferential grooves of the drum supporting the layers. 2. The apparatus of claim 1, furhter comprising means for adjusting the radial distance of each of said needling units from the surface of the drum.
Claim 8
Dependent Claim
15 words
The apparatus of claim 1, further comprising a programmed control for operating the reciprocating means.
Claim 9
Dependent Claim
110 words
The apparatus of claim 4, further comprising nip roller means arranged to remove the web continuously from the rotating drum, and a drive for rotating the nip roller means; the programmed control comprising an endless band, means for driving the endless band synchronously with the drive, and an array of programming cam means on the endless band; the reciprocating means comprising a pressure fluid operated motor and a hydraulic circuit for supplying hydraulic operating fluid to the motor; and the programmed control further comprising solenoid valve means in the hydraulic circuit and means for actuating the valve means in response to the programming cam means on the driven endless band.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |