Patent US5667869A successfully refreshed from Google Patents.
US5667869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Predrawn net particularly for geotechnical use
Assignee: Tenax SpA
•
Filing: 1995-04-10
•
Granted: 1997-09-16
•
Expires: 2015-04-10
Abstract
Abstract A predrawn net particularly for geotechnical use including an initial component that forms a first and a second layers that are respectively constituted by a first set of mutually substantially parallel filaments and by a second set of mutually substantially parallel filaments that lie transversely with respect to the filaments of the first set, so as to form a plurality of mutual joints. The filaments of the two sets mutually interpenetrate in the joints over a thickness that is less than 50% of one of the layers. The initial component is more than 8 mm thick. The filaments of at least one of the sets are drawn in the direction defined by the respective set of filaments so that the stretching action passes through the joints without substantially affecting the filaments of the other one of the sets.
Inventors
- 👤 Mario Beretta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:50
CPC Classifications
B; B29; B29D; B29D29/00; E; E02; E02D; E02D29/00; E02D29/02; E02D29/0225; E02D29/0241; Y; Y10; Y10S; Y10S264/00; Y10S264/81; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24124; Y10T428/24132; Y10T428/24273; Y10T428/24298; Y10T428/24306; Y10T428/24479; Y10T428/24562; Y10T428/24628; Y10T428/24661; Y10T428/24802; Y10T428/24826; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T442/00; Y10T442/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
213 words
Predrawn net particularly for geotechnical use, comprising first and a second layers that are respectively constituted by a first set of mutually substantially parallel filaments and by a second set of mutually substantially parallel filaments that lie transversely with respect to the filaments of said first set, so as to form a plurality of mutual joints, said first and second layers being formed from an initial substantially undrawn component in which said filaments of said sets mutually interpenetrate in said joints over a thickness that is less than 50% of the thickness of any one of said layers of the initial substantially undrawn component, said initial substantially undrawn component being more than 8 mm thick, at least the filaments of one of said sets of the predrawn net being drawn in the direction defined by the respective set of filaments so that the stretching action passes through said joints in the direction of the stretching action, so that a substantial part of the material of the joint added to said joint by the filaments of the other one of said sets is not orientated, and wherein the net comprises, at said joints of the predrawn net, a cavity that contains a gas and is surrounded by the plastic material that forms said filaments.
Claim 2
Dependent Claim
213 words
Predrawn net particularly for geotechnical use, comprising first and a second layers that are respectively constituted by a first set of mutually substantially parallel filaments and by a second set of mutually substantially parallel filaments that lie transversely with respect to the filaments of said first set, so as to form a plurality of mutual joints, said first and second layers being formed from an initial substantially undrawn component in which said filaments of said sets mutually interpenetrate in said joints over a thickness that is less than 50% of the thickness of any one of said layers of the initial substantially undrawn component, said initial substantially undrawn component being more than 8 mm thick, at least the filaments of one of said sets of the predrawn net being drawn in the direction defined by the respective set of filaments so that the stretching action passes through said joints in the direction of the stretching action, so that a substantial part of the material of the joint added to said joint by the filaments of the other one of said sets is not orientated, and wherein the net comprises, at said joints of the predrawn net, a cavity that contains a gas and is surrounded by the plastic material that forms said filaments.
Claim 3
Dependent Claim
46 words
Net according to claim 1, wherein the filaments of said other set of the predrawn net are drawn along the direction determined by the filaments of said other set, each one of said filaments being drawn, at said joints, in the direction determined by the filament.
Claim 4
Dependent Claim
56 words
Net according to claim 1, wherein, the gas bubble contained in said cavity of the joints of the predrawn net is adapted to act as a separator between the material that forms the joints of mutually transverse filaments; the joints between said filaments being internally provided with a separator element that is surrounded by plastic material.
Claim 5
Dependent Claim
169 words
Method for manufacturing a predrawn net, particularly for geotechnical use, comprising the steps of: extruding, by means of circular coaxial contrarotating spinnerets, an initial substantially undrawn product that is constituted by two sets of filaments in which the filaments of the respective sets are mutually parallel and are arranged transversely with respect to the filaments of the other set; and cutting said component, after extrusion, in a helical direction so as to obtain a layer element; wherein the filaments of the respective sets of said initial substantially undrawn product, in the regions where they mutually join, interpenetrate by less than 50% of the thickness formed by one of the sets of filaments; and wherein the total thickness of the initial substantially undrawn component is in excess of 8 mm; and wherein the method further comprises the step of providing cavities at the regions where the filaments of the respective sets join such that said cavities contain a gas and are surrounded by the plastic material that forms said filaments.
Claim 6
Dependent Claim
169 words
Method for manufacturing a predrawn net, particularly for geotechnical use, comprising the steps of: extruding, by means of circular coaxial contrarotating spinnerets, an initial substantially undrawn product that is constituted by two sets of filaments in which the filaments of the respective sets are mutually parallel and are arranged transversely with respect to the filaments of the other set; and cutting said component, after extrusion, in a helical direction so as to obtain a layer element; wherein the filaments of the respective sets of said initial substantially undrawn product, in the regions where they mutually join, interpenetrate by less than 50% of the thickness formed by one of the sets of filaments; and wherein the total thickness of the initial substantially undrawn component is in excess of 8 mm; and wherein the method further comprises the step of providing cavities at the regions where the filaments of the respective sets join such that said cavities contain a gas and are surrounded by the plastic material that forms said filaments.
Claim 7
Dependent Claim
47 words
Method according to claim 4, further comprising the step of drawing the filaments of a first set of filaments by drawing the material that passes through the joint regions and belongs to the material that is added to the joint by the filaments of said first set.
Claim 8
Dependent Claim
40 words
Method according to claim 5, further comprising the step of drawing the other set of filaments, the drawing of the filaments of one set substantially not affecting, in the joint regions, the drawing of the filaments of the other set.
Claim 9
Dependent Claim
96 words
Method according to claim 4 further comprising the step of drawing the filaments of a first set of filaments by drawing the material that passes through the joint regions and belongs to the material that is added to the joint by the filaments of said first set such that the gas bubble contained in said cavity after drawing is adapted to act as a separator between the material that joins the mutually transverse filaments and such that the joining region between said filaments is internally provided with a separator element that is surrounded by plastic material.
Claim 10
Dependent Claim
40 words
Method according to claim 7 further comprising the step of drawing the other set of filaments, the drawing of the filaments of one set substantially not affecting, in the joining regions, the drawing of the filaments of the other set.
References Cited (Backward Citations)
US3952127A
Cited
US4636419A
Cited
US4057449A
Cited
US4059713A
Cited
US4123491A
Cited
US4265956A
Cited
US4242295A
Cited
GB2073090A
Cited
US4303714A
Cited
US4374798A
Cited
GB2035191A
Cited
US4469738A
Cited
US5053264A
Cited
US5399411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-15 | 2001-03-17 | 2001-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-15 | 2005-03-17 | 2005-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-15 | 2009-03-17 | 2009-09-16 | $7700.00 | Window Closed / Lapsed |